Automotive wiring harness production process Quality control points in the manufacturing process of automotive wiring harnesses

The primary process of automotive wiring harness production includes: (1) offline; (2) Terminal crimping; (3) Pull-off force detection; (4) Terminal plug-in; (5) Equipment assembly; (6) Power-on detection; (7) Several primary processes such as appearance inspection. The production of automobile wiring harness is carried out on the basis of labor-intensive industries. On the basis of traditional industries, the processes are mostly operated manually. Because of the technical differences of workers and the instability of manual operation, it is very important to do a good job in the production process of automobile wiring harness and draw up operating specifications for different production processes. Only when each worker strictly implements the operating specifications during the production process can the yield rate of automobile wiring harness equipment be ensured. The off-line process is called "stripping" in the industry, that is, workers cut the wires centrally according to the process specifications. During the stripping process, the cutting length and method of the insulating skin should reduce the wire diameter, length and core error of the wires to below millimeter level. During the stripping process, the stripping length should meet the quality requirements, the cutting of the wire insulation skin should be kept flat, and there is no loose wire or oxidation in the wire core, so as to prevent misconnection and virtual connection during wiring. After the stripping is completed, the stripping head should be equipped with a protective cover to prevent core oxidation and core bifurcation due to storage problems. Before waiting for the next process, the wires should be placed on the wire frame during transportation to reserve space for terminal plugging.

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As the carrier of automotive electronic signal transmission, automotive wiring harness plays a vital role in the coordination between automotive power equipment and various systems. 1. Introduction: As a typical industrial product since the second industrial revolution, the automobile industry has been developed for more than a hundred years, and its production technology has been very mature. With the advancement of electrification and informatization of industrial equipment in the new era, the automobile wiring harness manufacturing process as the automobile neural system has attracted more and more attention from people. Exploring the key to quality control of automobile wiring harness manufacturing process is of great significance to improve the electrification level of automobile industry and ensure the qualified rate of automobile equipment. 2. Basic classification of automobile wiring harness assembly: Automobile wiring harness assembly is mainly divided into main harness, top harness, tail harness, engine harness, etc. Among them, main harness is the most complicated, branched and comprehensive wiring harness in automobile wiring harness assembly, which spreads around with the driver's instrument panel as the center, and combines all electronic equipment and power system of automobile in a hierarchical manner through the connection of instrument panel. The wiring harness system includes generator, fuse, relay and splitting and splitting harness switch. The top wiring harness of the automobile is connected with the main wiring harness, and the electrical system is connected with the upper electrical appliances of the automobile. When in use, the electrical signal enters the main wiring harness to supply electricity for the top lighting, skylight and other equipment. The operating principle of the tail wiring harness and the top wiring harness is the same. After being connected with the top wiring harness, the electrical signal enters the main wiring harness during use, and supplies electricity to the rear windows, wipers, trunk and other equipment of the car body. Generally, the engine wiring harness is connected with the main wiring harness, and serves as the electrical signal transmission of EFI fuel controller, engine sensor, ignition system and other equipment. Together, these wiring harnesses form the assembly produced by today's automobile wiring harness and are the carrier of electrical system transmission at all levels.

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