Speed requirements of parts processing

Generally speaking, the following methods are used by the mold parts processor:

1. Washing and cutting: mainly use milling cutter to mill the plane. 2. Grinding: mainly use grinding wheel to grind the surface of workpiece
2. Planing: it is mainly used for planing the surface of workpiece with planer.
3. Special processing: is the direct use of electrical energy, chemical energy and other processing methods.
4. CNC machining: mainly through digital information to control the machine tool, so that the parts and cutting tools to produce the required relative movement, from the surface to achieve parts processing.

The following methods are generally used in the processing of die parts:

1. Geometric accuracy the geometric accuracy of the Journal (roundness, cylindricity) should be limited within the range of diameter tolerance points. When the accuracy of geometric shape is high, the allowable tolerance can be specified on the part drawing.
2. The surface roughness can have different surface roughness values according to the different surface working parts of the parts. For example, the surface roughness of the bearing journal of the main shaft of the ordinary machine tool is ra0.160.63um, and the surface roughness of the matching journal is ra0.632.5um. With the increase of the machine speed and the improvement of the precision degree, the requirements of the surface roughness value of the shaft parts will become smaller and smaller
3. Dimension accuracy journal is the main surface of shaft parts, which affects the rotation accuracy and working state of shaft. The diameter accuracy of journal is usually it69 according to its application requirements, and the precision journal can reach it5.
4. Position accuracy mainly refers to the coaxiality of the matching Journal of the assembly transmission parts relative to the supporting Journal of the bearing, which is usually expressed by the radial circular runout of the matching journal to the supporting journal; according to the use requirements, the high-precision shaft is 0.0010.005mm, while the general precision shaft is 0.010.03mm. In addition, the coaxiality of the inner and outer cylindrical surface and the perpendicularity requirements of the axial positioning end face and the axis line are also included.