Technical specifications of
Finished heading and cold punching dies
Tolerances of cavity sizes
|
Diameters（㎜）（d）
|
Diameters tolerances（㎜）
|
Non. -circularity （f）
|
|
＜1.20
|
0.00～0.005
|
＜0.005
|
|
1.21～2.00
|
0.00～0.01
|
＜0.010
|
|
2.01～3.50
|
0.00～0.02
|
＜0.010
|
|
3.51～6.00
|
0.00～0.02
|
＜0.010
|
|
6.01～20.0
|
0.00～0.03
|
＜0.015
|
|
20.01～30.0
|
0.00～0.04
|
＜0.020
|
|
30.01～60.0
|
0.00～0.05
|
＜0.025
|
|
60.01～72.0
|
0.00～0.06
|
＜0.030
|
|
72.01～115.0
|
0.00～0.08
|
＜0.040
|
Reference for selection of reduction rate
|
Materials to be drawn
|
Reduction rate %
|
|
Alloy Steel
|
10～25
|
|
Copper
|
15～35
|
|
Aluminum
|
20～40
|
|
Steel
|
Q8＜45
|
20～30
|
|
Q8＞45
|
15～25
|
The basic using regulation of the mould
To develop the excellent capability of the carbide mould, get the longest using-life, produce the high quality metal product, you’d better obey below regulation
1. Select the grade properly according to the drawing and punching raw material’s physical mechanical capability and size.
2. Before drawing and punching, you should check if the drawing and punching machine are steady when running and without jumpiness, otherwise the carbide mould is easy to be hurt.
3. Before drawing and punching, you should clean the surface of the punching and drawing material carefully. If not, the carbide mould’s using-life will be shorter and formed the nick on the metal and bad quality of the surface.
4. Select the lube correctly could longer the using-life of the carbide mould, improving the quality of the drawing wear and punching accessory。
5. When drawing and punching in high speed, the good lubricate to the working area and cooling to the carbide mould could longer the using-life of the carbide mould.
6. To select the compressibility according to the size and capability of the drawing and punching material could longer the using-life of the carbide mould and improve the production efficiency.
7. During the process of drawing and punching, please note to control the surface of the material. If find form the nick on the surface because of attached metal powder on the mould inner hole, you should stop the machine and get rid of the metal powder and polishing the mould’s inner hole. So before using, you should clean the metal powder attached in the mould inner hole.
8. The properly using way of the carbide mould is, before appeared the metal powder on the mould’s inner hole, checked it timely to find the abnormality and treat it on time.
Keep the carbide mould proper, wipe the rust-resistant oil to protect the mould that is not use presently.
