As for the new generation of high-quality punching pins (punch dies), Tungsten carbide materials should be used as the key production raw materials, so that the overall performance of the resulting product is higher, that is, the density is higher, and the wear resistance is better. ,Does not rust. Tungsten carbide is made by powder metallurgy with tungsten carbide and cobalt powder as the main raw materials. It is worth noting that if the ratio of raw materials is different, the properties of Tungsten carbide products such as hardness or toughness will also be different, so the punch should be selected according to actual needs.
Picture of Tungsten carbide Material for Punching pin
The punch is mainly used in stamping dies. The die is processed into parts in the cold stamping process. Stamping is a pressure processing method in which the parts of the mold installed on the press, such as a punch, are used to apply pressure to the material at room temperature to cause separation or plastic deformation to obtain the required parts.
In the extrusion process, the punch will undergo permanent deformation, such as upsetting and bending, which are called plastic deformation. The main reasons for the deformation of the punch are: (1) Excessive extrusion force exceeds the yield strength of the punch material; (2) The strength and hardness of the punch are low; (3) The hardness of the blank material is too high; (4) 1) The blank volume is too large, and the excess material cannot be eliminated; (5) The punch material is improperly selected.
Picture of Tungsten carbide Material for Punching pin
In order to prevent the punch from bending and deforming, the punching pin should be made of Tungsten carbide material with good thermal hardness and high compressive strength. In addition, the manufacturer should also improve the guiding accuracy and installation accuracy of the mold to ensure that the male and female molds are coaxial during extrusion. At present, typical Tungsten carbide products are Tungsten carbide round bars, which are commonly used to make drill bit mold thimbles, mold centers, etc.; Tungsten carbide strips, which are commonly used to make woodworking knives, wear-resistant parts, etc.; Tungsten carbide plates, which are commonly used to make anti-theft plates , X-ray radiation shields, special-shaped parts, etc.; Tungsten carbide discs, often used to make round blades, etc.
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