​The characteristics of thinning and deep drawing process

The thinning and deep drawing process is usually a forming process after the deep drawing process or the cold extrusion process. In the deep drawing process, thinning and deep drawing is also a common process. The thinning and deep drawing is carried out at room temperature, and the materials usually used for thinning and stretching are: copper, oxygen-free copper, phosphor bronze, aluminum, aluminum alloy, low carbon steel, stainless steel, etc. INVITECH Precision—For more than 30 years, we have been engaged in the custom processing of precision metal stamping and drawing parts, and can customize various complex precision stamping and drawing parts according to customer requirements. Next, we introduce the characteristics of the thinning and deep drawing process of stamping parts.

(1) The gap between the die and the punch is smaller than the thickness of the blank; the straight wall of the blank is compressed when passing through the gap, resulting in obvious thinning and increasing the height of the side wall, so it is called thinning and deep drawing.

(2) The quality of the thinning and deep drawing parts is high, the wall thickness is relatively uniform, the wall thickness deviation is less than 0 ± within the range of 0.01mm, and the surface roughness Ra value is less than 0.2um. And because of the two-way compression, the crystal grains are small and compact, and the strength is improved.

(3) After the drawn part becomes thinner, the residual stress is relatively large, and even cracks appear during storage, which can be removed by low-temperature tempering.

(4) There is no wrinkle problem (compared with constant thin drawing), no need for blank holder.