Mold parts processing process

Position accuracy mainly refers to the coaxiality of the support shaft neck of the assembly drive as opposed to the support shaft neck of the assembly bearing, usually expressed by the radial round run-out of the support shaft neck with the matching shaft neck, and according to the requirements of use, the high precision shaft is specified to be 0.0010.005mm, while the general precision shaft is 0.010.03mm. In addition, there are coaxiality of the inner and outer cylindrical faces and the verticality requirements of the axial positioning end face and the pivot line.
Surface roughness Depending on the surface working part of the part, there can be different surface roughness values, such as the surface roughness of the ordinary machine shaft support shaft neck is Ra0.160.63um, and the surface roughness of the shaft neck is Ra0.632.5um, with the increase of machine running speed and precision, the surface roughness value of shaft parts will be smaller and smaller
Dimensional accuracy The shaft neck is the main surface of the shaft part, which affects the swing accuracy and working state of the shaft. The straight diameter accuracy of the shaft neck is usually IT69 according to its use requirements, and the precision shaft neck can reach IT5.
Geometry Accuracy The geometry accuracy of the shaft neck (roundness, cylindrical degree), mold parts should generally be limited to the diameter of the common range. When geometry accuracy is required, the tolerances allowed can be specified separately on the part diagram.