Automobile wiring harness sheath structure type adjustment

Polyethylene should have excellent rheological properties, and good polyethylene has a uniform stable melt index. Suitable for different cable diameters, can achieve a certain extrusion speed. Stable extrusion flow ensures product geometry and appearance integrity, that is, the product does not appear rough, wrinkles, slubs, blistering, localized and so on. In order to accommodate large-scale production, the stability of the inter-batch performance of the sheath material as a wire harness is also critical, because frequent adjustment of the extrusion process due to instability between batches is bound to affect the final performance of the automotive wiring harness. Poor quality of the sheath material, especially the recovery of the sheath material in each batch and between batch and batch is difficult to ensure its performance stability, so when extruding the sheath, it is necessary to constantly adjust the process parameters, so Will ultimately affect the stability of the car wire harness quality.

To modify the product information by operating the graphic, the graphics information is also required to correspond to the product structure information stored in the database. When AutoCAD is not running, the graphics are stored in the file system. The objects contained in the DWG file are recognized by their handles. After the graphics are opened, the graphics information can be accessed through the graphics database, and the handles of the graphics remain unchanged.

There are several reasons for this problem: first, the operator's experience in wiring and welding is insufficient; secondly, the operator's sloppy, the main reason is the lack of means for testing the integrated wiring of the whole system, although the inspection is carried out. But failed to find the problem in time. Therefore, in addition to improving the actual operating level of operators and strengthening process management, improving detection technology is one of the main factors to improve the reliability of the whole machine.

For automotive wire harness sheathing, mechanical properties need to be considered for yield strength, tensile strength, elongation at break, and abrasion resistance. Also of particular concern is the batch stability of the mechanical properties of PE sheathing materials and the rate of change before and after aging.

In polyethylene sheathing materials, carbon black is usually added to absorb ultraviolet rays. Its UV blocking effect is related to the carbon black content, the appropriate particle size and type, and the degree of dispersion.

The market structure refers to the market linkage characteristics of enterprises within the industry, that is, the status and characteristics of the commodity trading relationship between buyers, sellers, and buyers and sellers that constitute the industrial market. The main factors affecting the market structure are market concentration, economies of scale, barriers to entry and exit, and product differentiation. Market concentration is the most basic concept and indicator reflecting market competition and monopoly. It refers to the number of sellers and their relative size in the market and generally refers to the market concentration of sellers.

Using the above method, combined with the process characteristics of the automotive wiring harness. Designed and developed the automotive wiring harness CAPP system for the enterprise. Taking the wire harness of the light vehicle CNC control system as an example, for the partial view of the product structure after the product information input is completed, the length between the nodes, the surface coating mode, the terminal type, the part drawing number, the receiving node, and the jack circuit number can be determined. And other information. This information is always consistent with the product information in the database. Artists can easily understand the input of product information through graphics, and can also change product information through graphical interaction.