No matter what we do, we need a standard so that we can do things well, especially when machining precision parts. According to Xiaobian, on the lathe, the shape and size of the blank can be changed by the rotational motion of the workpiece and the linear or curvilinear motion of the cutter, and it can be processed to meet the requirements of the drawings.
Ordinary machine tools are increasingly difficult to meet the needs of processing fine parts. Together, because of the progress of production level, the price of CNC machine tools is declining. CNC fine parts processing mainly includes ultra-fine turning, mirror grinding and grinding.
The primary condition of CNC fine parts processing is the accuracy of its technological datum. The datum on mechanical drawings is indicated by a special datum symbol with a ring in capital letters A, B, C, D, etc. When the datum mark is aligned with the extension line of the face or the scale limit of the face, it indicates that the datum is based on the face. When the datum mark is aligned with the scale line, it indicates that the entity center line indicated by the scale is the datum line. The process precision mentioned earlier for you is a more abstract point of view.
Installation datum refers to the accuracy of locating parts in parts or products during installation. Measuring datum refers to the specification of dimension and orientation used to measure the appearance of the machined parts when they are inspected. Positioning datum refers to the datum used to locate a workpiece in a machine tool or fixture during processing.
Post time: Sep-30-2019