All posts by China Cnc Parts

Analysis of the corrosion resistance of carbon fiber composites


As an excellent structural material, carbon fiber has been used in many fields. In addition to the excellent properties of light weight and high strength, the corrosion resistance of carbon fiber composite materials is also more prominent than other structural materials. What makes carbon fiber have excellent performance? What about corrosion resistance? Let’s find out together.
It can be seen from the production process of carbon fiber that carbon fiber is a structure similar to graphite crystal formed by high temperature carbonization and graphitization at 2000-3000 °C. This structure itself has high resistance to medium corrosion. In some chemical media , its strength and modulus remain basically unchanged. However, in practical applications, carbon fiber is usually fused with matrix materials such as resin to form carbon fiber composite materials, so the corrosion resistance of carbon fiber products will be different from that of carbon fiber itself.
In different environments, carbon fiber products also have different corrosion resistance performance, because the comprehensive effect of ultraviolet rays, oxygen and moisture in the aging effect of the environment on epoxy resin composites is stronger than the unilateral effect, and the aging process Generally, it starts from the surface, and then gradually develops to the inside. With the development of carbon fiber composite product application technology, in many working scenarios with harsh environments, the good corrosion resistance of carbon fiber composite materials has won more and more application opportunities.
China Be-cu Prototype Material Technology Co., Ltd. is a professional manufacturer of carbon fiber products. The company has advanced fiber-reinforced composite material sheet, pipe, molding, autoclave, Cnc machining and other production lines. It has rich production experience and insists on bringing customers High quality carbon fiber products.
Analysis of the corrosion resistance of carbon fiber composites

ISO 9001 certified. BE-CU Prototype Offering CNC machining carbon fiber and other manufacturing services for carbon fiber marterial. Various capabilities include notching, labeling, drilling carbon fiber, grinding, laser cutting carbon fiber, finishing, plating, marking, CNC milling carbon fiber and turning carbon fiber.We stock high quality 3k carbon fiber sheet in a variety of thickness, types and finish. Its a great material used in applications where light weight and strength are needed such as drones. Unlike other workshops, we have no min order and are often filling orders with a single part. We also don’t make you pay for the full sheet and you only get charged for what is used. With a large selection of material, you should find everything you need to make your project come to life. We are also able to handle larger production runs and provide a competitive pricing. If we don’t have the material or finish you require, we are more the willing to look at bringing it in for you.

What Is Carbon Fiber?Carbon fiber is made of polyacrylonitrile (PAN) (or pitch, viscose) and other organic fibers by carbonization (removal of most elements except carbon) by pyrolysis method under inert gas at high temperature above 1,000 °C. Inorganic polymer fibers with a carbon content of more than 90%.

Spindle Components Of CNC Machining Centers


The role and function of the spindle The spindle component is one of the execution components of the forming movement of the machining center, and the spindle component of the machining center is required to have high running accuracy, long-term accuracy retention and long-term accuracy stability.

The machining center is usually used as a precision machine tool, and the running accuracy of the spindle components determines the machining accuracy of the machine tool. There are generally two methods for evaluating the running accuracy of machine tools: dynamic inspection and static inspection. Static inspection refers to the inspection of the runout of each positioning surface and working surface of the main shaft components under the condition of low speed or dynamic rotation of the main shaft. The dynamic inspection needs to use a certain instrument under the rated speed of the machine tool main shaft, and use a non-contact detection method to test the rotation accuracy of the main shaft.
 
Since the machining center usually has the function of automatic tool change, the tool is fastened by the tensioning mechanism installed inside the spindle of the machining center through the special tool holder, so the rotation accuracy of the spindle should consider the error caused by the machining error of the positioning surface of the tool holder. Machining center spindle bearings usually use C-class bearings. In the two-support spindle components, 41 and 22 are mostly used in combination, that is, four radial thrust bearings and one radial ball bearing are used for the front support and the rear support respectively. The supports use two radial thrust bearings to form the support system of the main shaft components. For light-duty high-precision machining centers, there is also a support system in which a radial thrust bearing is used for the front and rear supports to form the spindle components. This structure is suitable for high-precision and high-speed spindle components. The spindle accuracy is lost due to assembly errors and heat conduction, but the bearing capacity of the spindle will be greatly reduced.
 
When ordering the spindle bearings, you can choose single use order or paired use order. Paired use When ordering, the supplier will match the inner and outer rings of the paired bearings so that they have the specified axial interference after preloading on the main shaft. The optimal installation position of the paired bearings in the circumferential direction of the main shaft will also be marked by the supplier to meet the working performance requirements after the main shaft is installed.
 

 


At Be-cu.com,we use advanced equipment to offer you Unparalleled precision for producing metal and plastic machining parts

  • We combine the latest CNC milling and turning processes with proprietary technology to deliver high quality, on-demand parts.
  • Our team of engineers and machinists program the equipment to optimize cutting time, surface finish, and final tolerance to meet your design specifications
  • We specialize in cnc precision machining, single part prototyping, short to medium production runs, manufacture parts on time, every time, so you can stay ahead of schedule
  • CNC machining can create very similar parts to series parts. It is often more efficient and faster than other rapid prototyping technologies for the manufacture of a quantity of prototypes between 1 and 10 parts . We also recommend CNC machining for parts with large sizes (greater than 600 mm).

Matters Needing Attention In Machining Center Programming


Designing the machining process of the machining center is actually designing the machining steps of each surface. When designing the working steps of the machining center, it is mainly considered from the two aspects of accuracy and efficiency. The following are the main principles for the design of machining steps in the machining center;
 
The machined surface is completed in the order of roughing, semi-finishing, and finishing, or all the machined surfaces are carried out separately according to roughing first, semi-finishing and fine-graining later. When the machining dimensional tolerance requirements are high, the former can be used considering factors such as part size, accuracy, and deformation of the rigidity of the parts; when the machining position tolerance requirements are high, the latter is used.
 
For parts with both milling surfaces and boring holes, you can mill first and then boring. Dividing the steps in this way can improve the machining accuracy of the hole. When milling, the cutting force is large, and the workpiece is easily deformed. Boring the hole after milling the surface to allow it to recover for a period of time, reducing the impact on the accuracy of the hole caused by deformation. On the contrary, if the hole is boring first and then the surface is milled, then during milling, burrs and burrs will inevitably be generated at the hole, thus destroying the accuracy of the hole.
 
When the positional accuracy of a design datum and hole machining is close to the machine tool positioning accuracy and profit positioning accuracy, the principle of centralized processing of the same design datum is adopted, which can solve the problem of machining accuracy when there are more than one design dimensional reference for the same station .
In the centralized processing of the same station, the processing should be done according to the nearest position as much as possible to shorten the moving distance of the tool and reduce the dry running time.
 
Divide the steps according to the tools used. For example, the rotation time of some machine tools is shorter than the tool change time, without affecting the accuracy, in order to reduce the number of tool changes, reduce the idle time, and reduce unnecessary positioning errors, the tool concentration process can be adopted, that is, the same tool is used. Finish machining the same parts on the knife handle part, and then change the second knife.
 
Considering the repeated positioning error in the processing, the principle cannot be adopted for the hole system with high coaxiality requirements. After one positioning, through sequential continuous tool change, after processing all the holes of the coaxial hole system continuously, add other coordinate position holes to improve the coaxiality of the hole system.
In one positioning set-up, complete as much as possible all surfaces that can be machined.

At Be-cu.com,we use advanced equipment to offer you Unparalleled precision for producing metal and plastic machining parts

  • We combine the latest Cnc milling and turning processes with proprietary technology to deliver high quality, on-demand parts.
  • Our team of engineers and machinists program the equipment to optimize cutting time, surface finish, and final tolerance to meet your design specifications
  • We specialize in cnc precision machining, single part prototyping, short to medium production runs, manufacture parts on time, every time, so you can stay ahead of schedule
  • CNC machining can create very similar parts to series parts. It is often more efficient and faster than other rapid prototyping technologies for the manufacture of a quantity of prototypes between 1 and 10 parts . We also recommend CNC machining for parts with large sizes (greater than 600 mm).

Research on 5G Network Interconnection Scheme and Regulatory Issues

Abstract: With the in-depth development of 5G network construction in my country, 5G inter-network interconnection has become the focus of attention of operators and telecom authorities. 5G inter-network services include voice/video, rich media messages, inter-network roaming, etc. Both the program and the regulation put forward new requirements. This paper introduces the inter-network interconnection scheme of 5G services, and analyzes the issues that need to be paid attention to in interconnection supervision.

Key words: 5G; interconnection; IMS; RCS; inter-network roaming

1 Introduction

As a new type of infrastructure, 5G can provide key support for the digital, networked and intelligent transformation of society, and has become an important link in the strategic layout of my country’s information modernization construction. Currently in the critical period of centralized construction of 5G network, it is necessary to coordinate the layout, increase policy support and implementation, and further give full play to the role of telecom operators as the main body of construction and operation. Entering 2020, the 5G construction process has accelerated significantly. As an important part of network construction, inter-network interconnection has received attention from all parties. On the one hand, 5G service interconnection puts forward new requirements for the network construction of telecommunications companies; on the other hand, the service quality, settlement plan, and security guarantee of 5G service interconnection have also become important issues that telecommunications authorities pay attention to.

2 5G voice/video interworking

At present, the voice network of each operator is gradually evolving to the full IMS target network. VoLTE has been activated on 4G networks. Each operator is deploying the core network of 5G independent networking architecture, and will provide VoNR voice and video services in the future. At this stage, the calls between users within each operator’s network can use the high-definition voice/video and various audio and video CRBT services provided by the IMS, but the inter-network calls still use the circuit domain gateway office to communicate. When calls between users of different operators pass through the gateway office in the inter-network circuit domain, the signaling is converted into ISUP, and the media encoding is converted into PCM, so the inter-network calls cannot provide high-definition voice and video services.

In order to meet the needs of 4G/5G business development, the Ministry of Industry and Information Technology organized China Telecom, China Mobile and China Unicom to carry out IMS network interconnection pilot projects in Hunan and Sichuan provinces in 2019, and verified IMS services on 4G networks. Interoperability between networks. With the deployment of 5G independent networking architecture and the implementation of VoNR, 5G network audio and video services will also be interconnected through IP interworking gateway offices, providing high-definition voice/video, video color ringtones and other services between networks.

2.1 IMS Inter-Network Interworking Scheme

2.1.1 IMS Inter-Network Interworking Architecture

The interworking architecture of IMS networks is shown in Figure 1, following YD/T 3369-2018 “Technical Requirements for Interworking Between IMS Networks of Different Operators”[1]The IP bearer network is used for interconnection between the networks, and the intercommunication is carried out through the IBCF/TrGW. The Ici interface between the IBCFs is responsible for the forwarding of SIP signaling between the networks, and the TrGW completes the media channel establishment, media streaming, and media encoding and decoding under the control of the IBCF. Conversion, etc., the Izi interface between TrGWs is responsible for media forwarding between networks.

Figure 1 Interworking architecture between IMS networks of different operators

2.1.2 IMS Inter-Network Interworking Point Settings

Interconnection points between IMS networks are constructed on a provincial basis. IBCF is deployed in provincial capital cities, and TrGW is deployed in provincial capital cities or sinks to various cities according to the volume of interworking media traffic.

2.1.3 IMS inter-network routing

When a user dials the user number of another network, if the calling user and the called user belong to the same province, they will communicate within the province. .

2.2 Analysis of IMS Interworking Supervision Issues

Compared with the traditional circuit domain interconnection, the interconnection between IMS networks has changed in terms of interconnection protocols, interconnection point settings, service types, and billing and settlement. Corresponding adjustments need to be made in interconnection and interconnection supervision strategies.

2.2.1 Quality of Service

The monitoring of the quality of service of inter-network calls is the key content of interconnection supervision. As early as 2003, the telecommunications authority built an inter-network settlement and interconnection order monitoring system based on No.7 signaling. With the migration of the inter-network gateway office from the circuit domain to the IP network, the technical means of interconnection supervision have also changed accordingly. First, the collected signaling becomes IP data, and the monitoring points are changed from scattered collection in various cities to centralized collection at a single point in the province. Secondly, since the inter-network communication command is changed from ISUP to SIP, the signaling monitoring system needs to be transformed accordingly to realize the functions of SIP protocol analysis and analysis and processing. In addition, due to the best-effort feature of the IP network, attention should also be paid to the operation quality of the IP bearer network, such as packet loss, delay, and jitter.

2.2.2 Inter-network settlement

The original circuit domain gateway offices are deployed in various cities, and the inter-network call settlement distinguishes between local calls and long-distance calls, among which long-distance calls are further divided into inter-provincial long-distance and intra-provincial long-distance. IMS intercommunication gateways are deployed in provincial capital cities, and single-point intercommunication is adopted within the province, so the concept of intra-provincial long-distance disappears. In order to adapt to the changes in the IMS network interoperability architecture, the inter-network settlement rules can be simplified, and a unified settlement rate is set within the province, and no distinction is made between local calls within the province and long-distance calls within the province.

2.2.3 Management of fraudulent calls and harassing calls

In recent years, the governance of fraudulent calls and harassing calls has been deepened, and bad information on the Internet has also become one of the contents of the governance work. Each operator shall transmit calling numbers between networks in accordance with industry standards and relevant management regulations, and manage and control illegal calls initiated within the network. In terms of identifying and intercepting fraudulent calls and harassing calls on the Internet, operators should unify rules to avoid arbitrarily intercepting calls from the Internet.

3 5G message exchange

On April 8, 2020, China Telecom, China Mobile, and China Unicom jointly released the “5G Message White Paper”[2], the white paper proposes the concept of 5G messaging, and introduces the requirements of 5G messaging in terms of services, terminals, and networks. The 5G message service not only supports multimedia message interaction between individual users, but also enables industry customers to provide their users with new digital interactive services based on rich media. In terms of standardization, 5G messages are based on the Rich Communication Suite (RCS) mature standard (GSMA Universal Profile 2.4). After more than ten years of development, there has been extensive standard accumulation and practice accumulation, and it has a good technical foundation. my country’s 5G message standardization work is in progress, and the formulation of communication industry standards such as the overall technical requirements for 5G messages and terminal technical requirements has been basically completed.

Similar to short messages, each operator builds a 5G message center to provide services for users of its own network, and users of different operators need to use the inter-network interworking function to realize the interaction of 5G messages.

3.1 5G message network interworking solution

The industry standard for 5G message interworking is in the process of being formulated, which mainly stipulates the network architecture, routing organization, interworking function, interworking protocol, security and inter-network settlement requirements for 5G message interworking between users of different operators. The operator sets up a 5G message interworking gateway, which is responsible for the interworking of the 5G message signaling plane and media plane. The gateways are connected by dedicated lines or VPNs (see Figure 2).

  

Figure 2 Interoperability architecture between different operators’ 5G message networks

The following differences exist between 5G message interworking and short message interworking.

(1) Multimedia message transmission: Traditional short message gateways carry text information through signaling. 5G message interworking requires signaling and media layers to complete the transmission of multimedia messages. The protocols used include SIP, MSRP, and HTTP. Therefore, it is necessary to define the interworking interface to achieve message interaction.

(2) The focus of group chat messages is shifted: Different from traditional short messages, 5G messages provide group chat functions. When establishing a group, the 5G message center of one operator needs to establish a group focus, which is responsible for maintaining the user list and historical message content in the group. Users who create a group can transfer the group focus to other operators’ 5G messages Center, which involves the process of inter-network interaction.

3.2 Analysis of 5G Message Interworking Regulatory Issues

5G messaging is a new type of messaging service. Due to the introduction of rich media functions, it faces new challenges in terms of message transmission service quality and content security.

3.2.1 Quality of Service

5G messages are mainly multimedia data, including voice, image, video and other formats. The Internet transmission of various data should meet specific performance indicators. The competent telecommunications department can establish a monitoring system to monitor the transmission delay, delivery rate and other indicators of inter-network messages to ensure that the business meets the corresponding service quality requirements.

3.2.2 Inter-network settlement

Traditional short messages are billed and settled by piece. 5G messages introduce multimedia content. When interconnecting, they should have the ability to bill messages between networks based on traffic, number of pieces, and duration. The 5G message charging field should include charging type, calling and called party identification, media type, message content length, etc. The specific settlement rules and rates can be determined by the operator through negotiation.

3.2.3 Spam governance

The 5G message format has been upgraded from text to multimedia, posing new challenges to the governance of spam messages such as harassment and marketing. While carrying out 5G messaging services, operators will also provide technical means to prevent spam messages. Internet messages may become a blind spot for spam management, and telecommunications authorities need to coordinate the deployment of operators in advance to prevent the spread of spam and purify the cyberspace.

4 5G core network inter-network roaming

my country’s 5G networks are mostly constructed in high frequency bands, the network sites are dense, and the construction investment is huge; 5G network bandwidth is large, maintaining the same power spectrum density, 5G base stations need higher transmit power, resulting in increased base station power consumption; 5G active antenna units and The 2G/3G/4G passive antennas on the existing network need to be deployed independently of each other, which increases the rent of base stations and puts pressure on operating costs.To this end, the Ministry of Industry and Information Technology released the 5G development strategy[3]guide basic telecommunications companies to strengthen coordination and cooperation, give full play to market mechanisms, integrate advantageous resources, carry out 5G network sharing and inter-network roaming, accelerate the formation of a network pattern with multiple networks coexisting in hotspot areas and one network in remote areas, and create resource-intensive and operational Efficient 5G network.

4.1 5G Core Network Inter-Network Roaming Solution

5G core network inter-network roaming refers to the construction of a complete 5G network by an operator, and users of other operators access the network through roaming and use mobile communication services. In remote areas where the economy is underdeveloped, the number of users is small, and the demand for services is small, building a 5G underpinning network, and users of other operators can access the 5G network through core network roaming, which can greatly save construction investment and improve network efficiency. The specific technical requirements for inter-network roaming in the 5G core network are as follows.

(1) Technical system: Priority is given to realizing 5G inter-network roaming under the independent networking architecture, and it can also provide inter-network roaming with non-independent networking architecture.

(2) Equipment capabilities: network equipment and terminals should support 5G inter-network roaming with independent networking architecture, terminals should support automatic network selection mode, support 5G network priority network selection strategy, and support the simultaneous Display of two operator logos.

(3) Operator identification: In the roaming state, the terminal simultaneously displays the identification of the home network and the visited network to remind the user that the user is in a roaming state of different networks.

(4) Service realization: The voice, data and short message services provided by the operator to the users of this network and roaming users shall ensure the same communication quality. With VoNR as the 5G voice target solution, you can fall back/switch to the 4G network for calls if necessary.

(5) Routing mode: The home routing mode is preferred, that is, the roaming data is sent to the home network, and the user service is handled by the home network; the local routing mode can also be selected, that is, the user service is handled by the visited network.

4.2 Analysis of 5G Core Network Inter-Network Roaming Supervision Issues

Inter-network roaming in the 5G core network involves coordination between different operators at the technical and management levels. The business process is complex, and there are many issues to be paid attention to in terms of supervision.

4.2.1 Quality of Service

Operators providing roaming services should ensure that roaming users have the same quality of service as users on their own networks, so that roaming users can have a good 5G service experience. The competent telecommunication department may establish a monitoring system to monitor the service quality of inter-network roaming.

4.2.2 Inter-network settlement

Both parties opening roaming services should sign a settlement agreement, and the settlement rate should adhere to the principle of market dominance, and should be negotiated by each operator; if an agreement cannot be reached through negotiation, the telecommunications authority should intervene in coordination, refer to the comprehensive tariff level of roaming operators, and put forward coordination opinions or make an administrative decision. According to the market development, the competent telecommunications department shall regularly evaluate and adjust the settlement policies and settlement standards for different network roaming in a timely manner.

4.2.3 Network Security

Core network inter-network roaming needs to be connected to core networks of different operators, and there is a lot of data exchanged between the two parties, including user authentication information and service data. When establishing a roaming interworking link, the interface for the division of network security responsibilities should be clarified, a network security assurance plan should be proposed simultaneously, and a technical plan for preventing fraudulent calls and harassing calls should be made on the Internet.

5 Conclusion

my country has carried out 5G network construction in an all-round way. In order to cope with the new situation of 5G service development and enable users to obtain better service experience, operators have begun to deploy 5G service-oriented inter-network interconnection infrastructure. The competent telecommunications department needs to strengthen the supervision and coordination of interconnection between networks, and formulate interconnection policies that conform to the current situation of my country’s network, so as to effectively promote the construction of 5G networks and industrial development.

The Links:   FZ1200R12KF1 LP064V1-F

NC Tool Selection Points


The characteristics and requirements of Cnc tools (divided into two major systems: turning system and milling and boring system).CNC tools require high precision, good rigidity, convenient clamping and adjustment, strong cutting performance and high durability. Reasonable selection can not only improve processing efficiency but also improve product quality.

The main factors that should be considered in tool selection

  • 1. The material and performance of the workpiece to be processed: metal, non-metal, and its hardness, stiffness, plasticity, toughness and wear resistance.
    2. Processing technology categories; turning, drilling, milling, boring or roughing, semi-finishing, finishing and super-finishing, etc.
    3. The geometry of the workpiece, the machining allowance, and the technical and economic indicators of the parts.
    4. The cutting amount that the tool can bear.
    5. Auxiliary factor: operation interruption time, vibration, power fluctuation or sudden interruption, etc., how much does a CNC lathe cost.

Turning System (Integral Tool System)

1. Composition: It consists of a blade (tool), a tool body, a handle (or handle body), a cutter head, etc.
2. Codes and parameters of indexable inserts
3. The chip breaker geometry of the indexable insert: free chip breaking and smooth chip evacuation
4. Clamping methods of indexable inserts: wedge-up type, lever type, screw-up type Requirements: reliable clamping, accurate positioning, smooth chip removal, simple structure, and easy operation

5. Selection of indexable inserts

  • 1), blade material selection: high speed steel, cemented carbide, coated cemented carbide, ceramics, cubic boron carbide or diamond
  • 2), blade size selection: effective cutting toughness length, the amount of the knife to be eaten, the main declination angle, etc.
  • 3), insert shape selection: according to surface shape, cutting method, tool life, number of indexing, etc.
  • 4), the choice of the nose radius of the blade:
  • A. When roughing, the workpiece diameter is large, the strength of the blade is required to be high, and the rigidity of the machine tool is large, and the large tool nose arc is selected.
  • B. Finishing, small depth of cut, slender shaft machining, small machine tool stiffness, small tool nose arc

Tool system (modular tool system)

1. Composition; blade (tool), tool holder (or handle body), spindle or blade (tool), working head, connecting rod, main handle, and spindle

2. Selection of CNC milling tools

1), the choice of milling cutter type:

  • A. Select face milling cutter for processing larger plane,
    B. Machining bosses, grooves, facet end mills,
    C. Select the carbide corn milling cutter for machining the rough surface and roughing holes.
    D. Select ball end milling cutter for surface processing,
    E. Select the mold milling cutter for the surface of the mold cavity and the punch surface in the processing space,
    F. Select keyway milling cutter for machining closed keyway, etc.

2), the selection of milling cutter parameters

  • A. Main parameter selection of face milling cutter
    a) The diameter of the standard indexable face milling cutter is Φ16-Φ630): choose a small diameter for rough milling, and choose a large diameter for fine milling.
    b) Determine its geometric parameters according to the workpiece material, tool material and processing properties: milling cutters with small rake angle are usually selected, materials with high strength and hardness are selected with negative rake angle, and workpiece material hardness is not large. Small clearance angle, small clearance angle for coarse-tooth milling cutters, and large clearance angle for fine-tooth milling cutters. The edge inclination angle of the milling cutter is usually -5–15 degrees, and the main declination angle is 45-90 degrees.

B. Selection of main parameters of end mills

  • a), the tool radius r should be less than the minimum curvature radius ρ of the inner contour of the part
    b), the processing height of the part
    c), no through hole or deep groove selection
    d), select when processing shape and through groove
    e), the tool diameter when machining ribs is
    f) When roughing the inner contour surface, the maximum diameter of the milling cutter

3. Selection of machining center tools

The machining center tool is usually composed of two parts: cutting tool and tool holder. The cutting edge has various milling cutters for surface processing and various drill bits, reaming drills, boring tools, reamers and taps for hole processing. The tool holder should meet the requirements of the machine tool. The spindle is automatically loosened and clamped for positioning, and can accurately install various cutting tools and adapt to the clamping requirements of the tool changing manipulator.
1), the basic requirements for machining center tools
A. The tool should have high rigidity
B, high repeat positioning accuracy

 


At Be-cu.com,we use advanced equipment to offer you Unparalleled precision for producing metal and plastic machining parts

  • We combine the latest CNC milling and turning processes with proprietary technology to deliver high quality, on-demand parts.
  • Our team of engineers and machinists program the equipment to optimize cutting time, surface finish, and final tolerance to meet your design specifications
  • We specialize in cnc precision machining, single part prototyping, short to medium production runs, manufacture parts on time, every time, so you can stay ahead of schedule
  • CNC machining can create very similar parts to series parts. It is often more efficient and faster than other rapid prototyping technologies for the manufacture of a quantity of prototypes between 1 and 10 parts . We also recommend CNC machining for parts with large sizes (greater than 600 mm).

Overview Of Carbon Fiber Pultrusion


Pultrusion and winding are both important forming processes for fiber materials. The pultrusion process can produce products with light weight, corrosion resistance and low conductivity, which are suitable for mass production. It was originally used to produce glass fiber composite materials. With the development of technology, it is gradually used in carbon fiber and Kevlar fiber. Now, both civilian and industrial products of carbon fiber can be manufactured by this method. It has penetrated into many fields such as transportation, sporting goods, medical equipment and so on.
 
Pultrusion consists of three sequential, continuous automated processes, preforming of reinforcement material, resin infusion of the molded body and conversion of the preform into a solid layer and board peak resin curing. These three processes can be seen as three independent technical steps. The first stage is the formation of carbon fiber bundles with a properly oriented structure, and the second stage is the impregnation of the resin into the fiber preform. These two stages can be performed in parallel, saving time. The third stage is to complete the setting, curing and forming the final solid part in the heat setting mold. The whole process is affected by conditions such as tensile force, thermal expansion coefficient, and temperature. The pultrusion equipment itself is not an important factor in determining the success of machining and forming, it can be any kind of machinery that can realize clamping and drawing to make the material pass through the above three processes.
 
This article is just about telling you about the pultrusion technology of carbon fiber. China Be-cu official website will continue to update other content about carbon fiber, you can always pay attention to our website to check, if you need carbon fiber materials, you can find China Be-cu Carbon Fiber Composite Materials Co., Ltd.

 

ISO 9001 certified. BE-CU Prototype Offering CNC machining carbon fiber and other manufacturing services for carbon fiber marterial. Various capabilities include notching, labeling, drilling carbon fiber, grinding, laser cutting carbon fiber, finishing, plating, marking, CNC milling carbon fiber and turning carbon fiber.We stock high quality 3k carbon fiber sheet in a variety of thickness, types and finish. Its a great material used in applications where light weight and strength are needed such as drones. Unlike other workshops, we have no min order and are often filling orders with a single part. We also don’t make you pay for the full sheet and you only get charged for what is used. With a large selection of material, you should find everything you need to make your project come to life. We are also able to handle larger production runs and provide a competitive pricing. If we don’t have the material or finish you require, we are more the willing to look at bringing it in for you.

What Is Carbon Fiber?Carbon fiber is made of polyacrylonitrile (PAN) (or pitch, viscose) and other organic fibers by carbonization (removal of most elements except carbon) by pyrolysis method under inert gas at high temperature above 1,000 °C. Inorganic polymer fibers with a carbon content of more than 90%.

What Are The Carbon Fiber Connection Methods?


Carbon fiber composite materials are usually used in the manufacture of automobiles, rail vehicles and various mechanical equipment in the form of parts. Glue connection. Different connection methods have their own advantages and disadvantages. Let’s take a look at them together in this article.
 
For components whose thickness, length or overall volume account for a large proportion of the entire equipment, mechanical connection is usually used, because heavier or larger mechanical equipment tends to generate greater vibration and friction during operation. The mechanical connection is more conducive to the transmission of larger concentrated loads, and this method is more reliable. Moreover, if the parts need to be disassembled and replaced, it is more convenient to use a mechanical connection.
 
For components with light weight and small volume, they can be connected by gluing, because compared with mechanical connection, gluing is not only easy to obtain a smooth transition shape that meets the requirements of aerodynamics, but more importantly, it will not significantly increase the size of the body. Self-weight, and self-weight has a great influence on small, especially precision equipment, but because the bonding strength changes with environmental changes such as temperature and humidity, the reliability is reduced compared to mechanical connections. Not suitable for parts with high strength requirements.
 
China Be-cu Prototype Material Technology Co., Ltd. is a private technology enterprise engaged in the research and development of carbon fiber-based high-performance fiber-reinforced composite materials and the development and manufacture of advanced equipment parts such as rail transit, automobile industry, medical equipment, robots, etc. Rich production experience and multiple machining equipment are committed to bringing high-quality carbon fiber products to customers.

 

ISO 9001 certified. BE-CU Prototype Offering CNC machining carbon fiber and other manufacturing services for carbon fiber marterial. Various capabilities include notching, labeling, drilling carbon fiber, grinding, laser cutting carbon fiber, finishing, plating, marking, CNC milling carbon fiber and turning carbon fiber.We stock high quality 3k carbon fiber sheet in a variety of thickness, types and finish. Its a great material used in applications where light weight and strength are needed such as drones. Unlike other workshops, we have no min order and are often filling orders with a single part. We also don’t make you pay for the full sheet and you only get charged for what is used. With a large selection of material, you should find everything you need to make your project come to life. We are also able to handle larger production runs and provide a competitive pricing. If we don’t have the material or finish you require, we are more the willing to look at bringing it in for you.

What Is Carbon Fiber?Carbon fiber is made of polyacrylonitrile (PAN) (or pitch, viscose) and other organic fibers by carbonization (removal of most elements except carbon) by pyrolysis method under inert gas at high temperature above 1,000 °C. Inorganic polymer fibers with a carbon content of more than 90%.

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Small form factor 3D stereo depth sensing camera for robotics

eCapture has introduced a small form factor stereoscopic 3D depth-sensing camera. The new LifeSense G53 is just 50mm x 14.9mm x 20mm and is created for depth capture and object tracking for industrial, robotics and other applications driven by AI. The company plans to launch a full range of depth map cameras to meet the expanding demand for stereo imaging equipment over the next quarter.

The first in the cost-effective line, the G53 offers a 50-degree FOV. It comprises two Mono sensor pairs for multiple resolutions of stereo, mono and depth disparity/distance map output via USB. The camera is perfect for the development of Robots, AGV and AMR, G2P delivery, and fast-motion depth capture.

“The surging industrial market opportunity provides immense opportunities for the eCapture line of 3D depth-sensing cameras. Applications such as robotics, drones, facial recognition, smart retail, 3D scene learning, and autonomous guided vehicles all are growing and require the type of high-quality cameras we create,” said James Wang, chief strategy officer of eYs3D.

This very small form factor camera provides a clean depth map output and needs only minimal host computing support. It is ideal for an extensive range of depth applications in fast-moving systems with excellent indoor and outdoor depth output performance. The device includes the eCapture SDK supporting Windows, Linux, and Android OS environments. Different programming language support and wrapper APIs are also offered.

GeneSiC Semiconductor MBR30040CT

MBR30040CT

#MBR30040CT GeneSiC Semiconductor MBR30040CT New MBR30040CT Rectifier Diode, Schottky, 1 Phase, 2 Element, 150A, 40V V(RRM), Silicon,; MBR30040CT , MBR30040CT pictures, MBR30040CT price, #MBR30040CT supplier
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Email: sales@shunlongwei.com sales@shunlongwei.com

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Manufacturer Part Number: MBR30040CT
Part Life Cycle Code: Contact Manufacturer
Ihs Manufacturer: GENESIC SEMICONDUCTOR INC
Package Description: R-PUFM-X2
ECCN Code: EAR99
HTS Code: 8541.10.00.80
Manufacturer: GeneSic Semiconductor Inc
Risk Rank: 5.72
Application: POWER
Case Connection: CATHODE
Configuration: COMMON CATHODE, 2 ELEMENTS
Diode Element Material: SILICON
Diode Type: RECTIFIER DIODE
Forward voltage-Max (VF): 0.65 V
JESD-30 Code: R-PUFM-X2
Non-rep Pk Forward Current-Max: 2500 A
Number of Elements: 2
Number of Phases: 1
Number of Terminals: 2
Operating Temperature-Max: 175 °C
Operating Temperature-Min: -40 °C
Output Current-Max: 150 A
Package Body Material: PLASTIC/EPOXY
Package Shape: RECTANGULAR
Package Style: FLANGE MOUNT
Rep Pk Reverse Voltage-Max: 40 V
Reverse Current-Max: 8000 µA
Surface Mount: NO
Technology: SCHOTTKY
Terminal Form: UNSPECIFIED
Terminal Position: UPPER
Rectifier Diode, Schottky, 1 Phase, 2 Element, 150A, 40V V(RRM), Silicon,

Japan’s largest property insurance company hit by ransomware attack: the insurance industry has become the main target

Japan’s highest-earning property and casualty insurance group Tokio Marine disclosed that its Singapore branch was attacked by ransomware;

Several large insurance companies have been hit by ransomware this year, and a representative of the REvil ransomware group said insurance companies have become attractive targets for ransomware attackers.

A few days ago, Japanese multinational insurance company Tokio Marine Holdings disclosed that its Singapore subsidiary, Tokio Marine Insurance (TMiS), was hit by a ransomware attack.

The announcement, made earlier this week, contained few details of the incident other than disclosing the response.

The attack has little impact

As Japan’s highest-paid property and casualty insurance group, Tokio Marine is undoubtedly an attractive target for cybercriminals. They have also been looking for viable loopholes, hoping to squeeze money out of Tokio Marine’s customers.

Tonkin Marine pointed out that the ransomware attack mainly affected its Tokio Marine Insurance branch in Singapore, and other companies of the group in Singapore were not affected.

It is unclear when or how the attack was launched or what the consequences were. But the Singapore branch implemented a network isolation immediately after discovering the problem, and notified local government agencies.

The parent company said it could “confirm that there is no indication that any of the group’s customer or confidential information has been compromised.”

Currently, most ransomware attacks are also accompanied by data breaches, with more and more attackers stealing sensitive files from victim networks before encryption.

However, Tonkin Marine has brought in a third-party agency to conduct systematic analysis and assess the impact of the attack.

The company disclosed the incident in Japanese and English on its official website, and apologized to its customers for “all inconveniences and concerns caused”.

  Insurance companies are major targets

Tim Starks of foreign media CyberScoop said that Tokio Marine is the second insurance company to announce a cyber attack this week. On Monday, Ryan Specialty Group said it detected unauthorized access to some employee accounts in April.

In addition, several other large insurance companies fell victim to ransomware attacks earlier this year.

In March, CNA Financial Corporation, the seventh-largest commercial insurer in the United States, was hit by the Phoenix CrypotoLocker ransomware attack, which also stole files containing customer information.

In May, the Avaddon ransomware gang attacked AXA branches in Thailand, Malaysia, Hong Kong and the Philippines and claimed to have successfully stolen 3 terabytes of data.

Earlier, a representative of the REvil ransomware gang was also interviewed by Recorded Future intelligence analyst Dmitry Smilyanets, and admitted that insurance companies have become attractive targets for ransomware attackers.

The representative, codenamed “Unknown,” declared that insurance companies were “the most tender and juicy delicacy.” They can reach the insurance company’s customer base through hacking attacks, and use the customer as a threat to put pressure on the insurance company.

“Yes, they are the most tender and juicy delicacy. The best way is to hack the insurance company first, reach their customer base and collect targeted attacks accordingly. Once you have a strategy in place, you can launch the insurance company. impact.”

 

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