Tips for reducing defects in mold processing

In order to improve the performance of molds, many manufacturers will perform appropriate processing on their molds. Mold processing refers to the processing of forming and blank making tools, as well as shear molds and die-cutting molds. However, in many cases, the completion of mold processing will also reflect processing defects, leading to a decrease in mold performance. So how to build mold processing defects? Below, the editor will explain to you.
Reasonable selection and dressing of grinding wheels, using white corundum grinding wheels is better. Its performance is hard and brittle, and it is easy to generate new cutting edges. Therefore, the cutting force is small, and the grinding heat is small. It is better to use medium grain size, such as 46-60 mesh, in the hardness of the grinding wheel, use medium soft and soft (ZR1, ZR2, R1, R2), that is, coarse grain and low hardness grinding wheels. Good self excitation can reduce cutting heat. It is important to choose an appropriate grinding wheel during precision grinding. For the high vanadium and high molybdenum conditions of mold steel, it is more suitable to choose GD single crystal corundum grinding wheel. When processing hard alloys and materials with high quenching hardness, diamond grinding wheels with organic binders are preferred. The organic binder grinding wheel has good self grinding performance, and the roughness of the ground workpiece can reach Ra0.2 μ m. In recent years, with the application of new materials, CBN (cubic Boron nitride) grinding wheel has shown a very good machining effect, which is superior to other types of grinding wheels in precision machining on CNC forming grinder, coordinate grinder, CNC internal and external grinder. In grinding processing, it is important to promptly trim the grinding wheel to maintain its sharpness. When the grinding wheel is passivated, it may slip and squeeze on the surface of the workpiece, causing surface burns and reduced strength.
Reasonably use cooling lubricating fluid to play the three major roles of cooling, washing, and lubrication, maintain clean cooling and lubrication, and control grinding heat within the allowable range to prevent thermal deformation of the workpiece. Improve the cooling conditions during grinding, such as using oil immersed grinding wheels or internally cooled grinding wheels. The Cutting fluid is introduced into the center of the grinding wheel, and the Cutting fluid can directly enter the grinding area to play an effective cooling role and prevent the workpiece surface from burning.