Precision parts machining possibilities and convenience
What are the parts of the
precision parts machining technology? Precision parts machining technology involves a wide range, only from the processing of the possibility and convenience of both aspects of analysis. Mainly on the part processing pattern size data should be consistent with the principle of programming convenience (1), constitute the contours of the geometric elements of the conditions should be sufficient (2).
(1) Dimension drawing on parts drawing should be adapted to the characteristics of
CNC machining. On
precision machining drawings, the same reference size should be used or the coordinate size should be given directly.
1. This annotation method is easy to program and easy to coordinate with each other. It is very convenient to maintain the consistency of design basis, process benchmark, test reference and programming origin.
2. As the parts designers generally in the size of the assembly to consider the use of more features such as assembly, and had to use the local decentralized labeling method, which will arrange for the process and CNC processing a lot of inconvenience.
3. Because precision machining precision and repeat positioning accuracy are very high, will not produce a large accumulation of errors and damage the use of characteristics, so the local decentralized labeling method can be changed to the same reference size or directly given the size of the coordinates The labeling method.
(2) in the manual programming to calculate the base point or node coordinates. In automatic programming, the precision part processing to define the contours of all the geometric elements to define. Therefore, in the analysis of the parts diagram, to analyze the geometric elements of the given conditions are sufficient.
Such as arc and straight line, arc and arc tangent on the pattern, but according to the size given in the figure, in the calculation of tangent conditions, into a phase or phase separation. Due to the composition of precision parts processing parts geometric elements of the conditions are not sufficient, so that programming can not start. When this happens, you should consult with the part designer.
