Mold standard parts processing, a general guiding principle is according to the different materials, different shapes, different technical requirements for processing adaptability, it has certain plasticity, can through the control of processing, to achieve the good processing effect.

According to the different parts of the appearance and shape, can be roughly the parts can be divided into three categories: shaft, plate and special-shaped parts. The common process of roughly: rough machining, heat treatment (quenching and tempering), fine grinding, EDM - fitter (surface is dealt with) - group with processing.

Parts heat treatment

Parts of the heat treatment process, in the parts to obtain the required hardness, but also need to control the internal stress, to ensure that the size of the parts processing stability, different materials have different processing methods. With the rapid development of mold industry in recent years, the kinds of materials used in increased, in addition to the Cr12, 40Cr, Cr12MoV, hard alloy, of strength big, force strict convex and concave mold, selection of new materials of powder alloy steel, such as V10 and asp23, this material has higher thermal stability and good organization.

For Cr12MoV for parts of the material, after the rough machining is quenched, quenched workpiece has a lot of remaining stress, easily lead to cracking the finishing or work and quenched parts should be while it is hot tempered, eliminate quenching stress. Quenching temperature control in 900-1020 deg.c, and then cooled to 200-220 DEG C released air cooling, then quickly melted down to 220 DEG C tempering. This method called for a hardening process can obtain high strength and abrasion resistance, the wear is the main failure form of die effect better. In the production of some of the more corners, the shape of the complex workpiece, tempering is not enough to eliminate the quenching stress, before finishing the need to go to stress annealing or multiple aging treatment, fully release the stress.

For powder alloy steel parts, V10, APS23. Because it can withstand high temperature tempering, quenching can be the secondary hardening process, quenching of 1050 and 1080 DEG C, and then 490-520 DEG C high temperature tempering and many, can obtain higher impact toughness and stability, on to edge collapse is the main failure forms of mold is applicable. The cost of powder alloy steel is high, but its performance is good, and it is forming a trend.