What are the processing characteristics of metal automobile stamping parts in the market?

2020-01-07 10:21:27

The welding method of stamping parts is generally determined by their volume, welding position and structure of welding stamping parts, generally including overhead welding, flat welding, vertical welding and horizontal welding. Among the four welding methods, the complicated one of Zui is overhead welding. In the process of overhead welding, Zui short arc and small diameter electrode are used, so it is very difficult.

When the metal stamping parts are flat welded, the general weld is on the horizontal line, the operation is relatively simple, and the diameter of the welding rod can also be larger, the production efficiency is greatly improved, the only defect is that the molten iron and slag are easily mixed together.

In the process of vertical welding and horizontal welding of stamping parts, because the molten metal flows down, there will be defects, so at this time we have to choose small-diameter electrodes and use a shorter arc to weld stamping parts, and the welding current is also one tenth smaller than usual.

Compared with castings and forgings, metal stamping parts are thin, uniform, light and strong. Metal automobile stamping parts can be made into workpieces with stiffeners, ribs, undulation or flanging which are difficult to be manufactured by other methods, so as to improve their rigidity. Due to the use of precision die, the precision of workpiece can reach micron level, and the repetition precision is high, the specification is consistent, and the hole and socket, boss, etc. can be punched.

Generally, the cold stamping parts are no longer machined, or only need a small amount of metal stamping parts machining. The accuracy and surface state of hot stamping parts are lower than that of cold stamping parts, but they are still better than castings and forgings, and the machining amount is less.

The surface and internal properties of metal stamping parts have a great influence on the quality of stamping products, which requires that the thickness of stamping materials is accurate and uniform; the surface is smooth without spot, scar, scratch, surface crack, etc.; the yield strength is uniform without obvious directionality; the uniform elongation is high; the yield ratio is low; the work hardening is low.

Stamping is an efficient production method. By using compound die, especially multi position progressive die, multiple stamping processes can be completed on a press, realizing the full-automatic production from uncoiling, leveling, blanking to forming and finishing. It has high production efficiency, good working conditions and low production cost. Generally, it can produce hundreds of pieces per minute.

Stamping is mainly classified by process, which can be divided into separation process and forming process. The purpose of the separation process is to separate the stamping parts from the sheet along a certain contour line and ensure the quality requirements of the separation section. The purpose of forming process is to make the sheet metal plastic deformation without breaking the blank, and to make the required shape and size of the workpiece. In actual production, it is often a variety of processes applied to a workpiece.