Improve the application requirements of wire harness products for connection technology

As the requirements of today's applications continue to increase, they are on the wiring. Requirements are also gradually approaching the limits of wiring, so the accuracy testing of test equipment is becoming more and more important. Inaccurate or impractical test equipment will cause serious damage to the normal operation of the entire system in the future.

Wire harness product process design is the input and output process of the product. The whole design plan is built around quality, cost, and operability, and finally meets various requirements of product characteristics, and at the same time controls manufacturing costs. When the process design is unfolded, first consider the product quality, ensure that the joint positions do not overlap, but large, not designed on the branch; secondly, consider the operability of the workers, minimize the difficulty of work; finally, according to the principle of nearby iron, Try to save wire. Determine the position of the centralized crimping point inside the wire harness of the ground wire, the centralized connection mode of the internal connection point, and formulate technical requirements. Due to the different branch positions, sizes, electrical functions, location and number of grounding points in different automotive wiring harnesses, the internal connection of the grounding wires is diversified.

With the increase of the functions of automobiles, the universal application of electronic control technology, coupled with the increasing requirements for safety, comfort, and economy of automobiles, the more and more electrical appliances and electrical functions on automobiles; There are more and more electrical components and more and more wires; the wiring harness connecting the various electrical components is becoming more and more complicated and the wiring harness of the automobile becomes thicker and heavier. Therefore, advanced cars have introduced bus configurations using multiplex systems.

The tools need to be fully prepared, and the construction personnel should be familiar with the use, inspection and precautions of various tools. Prepare the required heat-shrinkable materials and supporting materials, check whether the materials are qualified, and determine the type of heat-shrinkable materials used according to the wire harness structure and specifications. The construction site should be kept clean and dry, and safety technical measures should be taken when using the blowtorch. The quality of the wire harness crimping directly affects the service life of the connector and the safe operation of the wire harness.

Filled with inorganic flame retardants, the mechanical strength and elongation at break are much worse than non-flame retardant polyolefin sheathing materials. The flame retardant polyolefin sheathing material has low mechanical strength, and the commonly used flame retardant polyolefin sheathing material has an oxygen index of 25 - 28. The flame retardant effect is not very good, and it is only suitable for applications where the temperature is low, the movement or bending is appropriate, and the flame retardancy requirements are not too high, and it is not suitable for application in an electronic wire harness requiring high flame retardancy. The halogen-free, low-smoke flame-retardant polyolefin sheathing material has better flame retardancy and charcoal during combustion and is suitable for use in an electron beam bundle having low halogen, low smoke and high flame retardancy requirements.

When the wire is separated from the wire harness and connected to the electrical equipment, if the rated current of the electrical equipment is small, the cross section should also be small. At this time, it is mainly considered whether the wire can withstand the vibration of the vehicle during the driving process. may.

It realizes the computerization and standardization of the process card design of the wire harness manufacturers in the automotive supply chain in the decentralized network environment, and can effectively manage all kinds of process graphic information and quickly and accurately retrieve, thus reducing the labor intensity of the process personnel and shortening the process. Design cycle, lifting the efficiency and quality of process design and enhancing the competitiveness of enterprises.

Instead, the push model requires the developer to write code that is connected to the database, execute SQL commands to create a recordset or dataset that matches the fields in the report and pass the object to the report. This method can share the connection in the application and filter the data before receiving the data.

At present, the detection system adopted by domestic automobile wire harness manufacturers can only complete the detection of wire harness continuity and does not have the wire harness impedance quantitative detection function. Many wire harnesses that pass the test at the factory are faulty when used for a while. The cause of the problem is that the impedance of the wire harness does not meet the technical requirements, and the wire harness is heated or burned out for a long time.