(1)
For example, the processing accuracy is gradually improved according to the order of the rough car-semi-essence-stainless car. The rough car will process most of the processing waste on the surface of the workpiece on the surface (cut off. On the one hand, the metal resection rate is increased, and on the other hand, it meets the amount of the remaining vehicle's balance uniformity. When the uniformity of the remaining amount cannot meet the requirements of the precision processing, semi -semi -semi -stalls are arranged to prepare for the stainless vehicle. To ensure the processing accuracy of the stainless vehicle, cut out the contour of the part according to the size of the pattern.
(2) Closer first and far away
Under normal circumstances, processing in modern parts of the knife point is processed first, and then processed after the part of the pairing knife point, so as to shorten the moving distance of the tool and reduce the air schedule. For driving, the first and then the distant sea is conducive to maintaining the stiffness of the blank or semi -finished products and improved its cutting conditions.
(3) The principle of cross -interior and external cross
For parts that have both inner surfaces (inner cavities) and parts that need to be processed on the outer surface. When the processing sequence is arranged, the inner and outer surface should be carried out first, and then the inner and outer surface should be processed. Do not process the part of the part of the part (outside or inner surface), and then process other surfaces (inner surfaces or surfaces).
(4) Principles of the base surface first
Preferential processing should be used as the surface of precision. This is because the more jing is jing because the surface of the positioning benchmark, the smaller the fiber error.
(5) The principle of the first master and then
The main working surface and assembly of the parts should be processed first, so that the main surface of the rough may occur early in the rough. The secondary surface can be interspersed. After the main processing surface is processed to a certain degree, it is carried out before the final processing.
(6) Principles of the holes first
The plane contour size of the box and stent parts is large. Generally, the plane is processed first, and then processed holes and other sizes. In this way, arrange the processing sequence, on the one hand, use the processed plane positioning to be stable and reliable; on the other hand, the processing holes of the processing plane are easy and the processing accuracy of the hole can be improved. Partial.
