How to determine the form and position of the parting surface for wheel forgings?

2024-08-14 15:21:57

closed die forging and open die forging can be used on the flat forging machine for the subdivision of wheel forgings.

closed die forging uses front baffle positioning to control the volume of deformed metal, so closed die forging is mostly used. The advantage is that it does not require a trimming process, but it is generally prone to longitudinal burrs, which must be removed by grinding with a grinder.

The advantage of setting the parting surface at the forefront of the maximum contour is that the convex mold structure is simple, and the head and rod of the wheel forging are not eccentric. For non rotating wheel forgings, it simplifies mold manufacturing, installation, and adjustment work. The disadvantage is that longitudinal burrs are easily pulled out during the trimming process.

The advantage of setting the parting surface in the middle of the maximum contour is that the flying edge is cleanly cut during trimming, and the flying edge position is generally 10-15mm away from the convex mold direction. The disadvantage is that improper adjustment of the convex and concave molds can easily lead to errors, and it requires good concentricity in the manufacturing of the final forging die chamber and the trimming die chamber.

The advantage of setting the parting surface at the rear end of the maximum contour is that the wheel forgings are formed inside the convex mold, and the inner and outer diameters of the wheel forgings and the concentricity of the front and rear steps are good. The disadvantage is that it is difficult to locate the wheel forgings in the trimming die chamber, and errors are prone to occur between the wheel forgings and the billet, which are rarely used. However, wheel forgings are often used, and their burrs are cold cut on the press.