Home >  News

Why does the Aluminum Stamping Lids surface have defects?

Dec. 04, 2019

Sixty to seventy percent of the world's steel is a plate, and most of them are finished products by stamping. The car body, chassis, fuel tank, radiator sheet, boiler drum, container shell, motor, and iron core silicon steel sheet of electrical appliances are all stamped. There are also a large number of stamped parts in instruments, household appliances, bicycles, office machinery, household utensils and other products.

Compared with castings and forgings, Metal Stamping has the characteristics of being thin, uniform, light and strong. Stamping can make workpieces with stiffeners, ribs, undulations or flanging that are difficult to manufacture by other methods to improve its rigidity. Due to the use of precision molds, the precision of the workpiece can reach the micron level, and the repeatability is high, the specifications are consistent, and holes and bosses can be punched out.

Stamping parts are mainly formed by pressing metal or non-metal sheets through the use of the pressure of a press through a stamping die. It has the following characteristics:

Stamping parts are manufactured by stamping on the premise of low material consumption. The parts are light in weight and rigid, and after the sheet is plastically deformed, the internal structure of the metal is improved, which increases the strength of the stamped parts.

⑵The stamping parts have higher dimensional accuracy, are uniform in size with the mold parts, and have good interchangeability. No further machining is required to meet general assembly and use requirements.

⑶During the stamping process, because the surface of the material is not damaged, it has a good surface quality and a smooth and beautiful appearance, which provides convenient conditions for surface painting, plating, phosphating, and other surface treatments.

Aluminum Stamping Lids

Aluminum Stamping Lids

With the development of society, stamping products have been popularized in all walks of life. It is very important to process stamping parts of good quality. In stamping processing, there will be many defects on the product surface. What is going on?

In the processing of stamping parts, problems such as impact lines, slip lines, collapse, hidden pits, surface distortion, etc. sometimes occur. For Aluminum Stamping Lids, defects on the outer surface are not allowed. ?

First, the impact line and slip line are mainly due to surface scratches caused by friction at the stress concentration point after the sheet material and the mold contact during the stamping process. Collapse, pit,

Second, the surface distortion is mainly due to insufficient deformation of the part, local material strain is small, and defects that occur after the external force is released;

So how to eliminate these defects?

1. Eliminate the impact line, you can change the stamping fillet, die fillet, increase the drawing depth, change the blanking surface and other methods.

2. Eliminate the slip line, you can change the shape of the product (left-right symmetry), increase resistance and other methods.

3. To eliminate the collapse and surface distortion, you should understand the level of the stress gradient generated by the part in the deformation area, and try to ensure the uniformity of the plastic deformation of the product. At the same time, by increasing the resistance and improving the local shape and strain.

We are Aluminum Stamping Lids Supplier, welcome to consult.

Contact Us
Follow Us