The current drawing die includes a die sleeve, a base layer, and a drawing hole. From the outside to the inside, it is the die sleeve, the base layer, and the drawing hole. The drawing hole is the entrance area, the working area, the sizing area, and the exit area from the front to the back. The base layer is tungsten. Steel layer or synthetic diamond layer. When the drawing die of this structure is drawn, the deformation stress of the metal wire is too large during the drawing process, the drawn metal wire is not smooth, and the surface is easily scratched. When used for drawing, the smoothness is very demanding. When the welding wire is high, the quality requirement of the product cannot be met. So, what structural regulations must high-quality drawing dies comply with?
The high-quality drawing die has a small deformation stress of the metal wire during the drawing process, and the smoothness of the drawn metal wire is obviously improved. The structure includes die sleeve, base layer, and wire drawing holes. From outside to inside, there are die set, base layer, and wire drawing holes. From front to back, the wire drawing holes are entrance area, working area, sizing area, exit area, base layer and wire drawing. The transition of the hole and the area corresponding to the working area are diamond coated. The base layer is a tungsten steel layer or a diamond layer.
The cone angle of the inlet zone is 50°-70°, and the cone angle of the inlet zone is preferably 60°.
The cone angle of the working area is 20°-30°, and the cone angle of the working area is preferably 24°
The cone angle of the outlet zone is 65°-85°, and the cone angle of the outlet zone is preferably 75°.
There is a diamond coating on the base layer corresponding to the working area and sizing area of the wire drawing hole. Due to the high hardness of the diamond, when the wire comes out of the wire drawing hole, the smoothness of the wire is significantly improved, and the deformation stress during the drawing process With further reduction, the metallurgical structure of the metal wire is further optimized during the drawing process. When drawing welding wire, the drawing effect is more prominent.
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