Things to pay attention to when processing parts in mechanical processing plants

When the mechanical processing plant is processing mechanical parts, if the workpiece is too high, it should be roughed with different length cutters in layers. After roughing with a big knife, the remaining material should be removed with a small knife. Flat-bottomed knives are used to machine planes, and ball knives are used less in order to reduce the processing time; if there is an inclination and it is an integer, the oblique knife is used for machining.
At the same time, the tolerances are set reasonably to balance the machining accuracy and computer calculation time. Do more procedures to reduce the time of empty cutter; if the rough material is high in hardness, choose up-cut milling; if the rough material is low in hardness, choose down milling. Rough machining, up-cut milling, fine machining down milling; tool materials have good toughness and low hardness, suitable for rough machining, and tool materials have poor toughness and high hardness for fine machining.

The clamping method of the machined parts on the CNC machine tool processing of the mechanical processing plant should also reasonably choose the positioning datum and the clamping plan. When selecting the precise datum, it is generally necessary to follow the two standards of 'standard unification' and 'standard overlap'. This principle, in addition to these two principles, it is also necessary to consider as far as possible to complete the processing of all surfaces in one positioning and clamping. Therefore, it is necessary to choose a positioning method that is convenient for each surface to be processed.

When the workpiece is clamped at one time, it should be able to complete the processing of all surfaces of the workpiece; when determining the placement position of the workpiece on the worktable, consideration should be given to the processing of each station, the length of the tool and the rigidity of the tool. The impact of processing quality. The fixtures used in the control processing should be assembled from common components as much as possible, and can be adjusted to shorten the production preparation cycle.

Machinery processing plants must follow the basic principles when arranging the processing sequence, including 'face first, hole secondIt is processed according to the tool centralized process, avoiding repeated use of the same tool multiple times, and reducing the number of tool changes and time.

For the hole system that requires high coaxiality, after one positioning, the processing of the hole system should be completed, and then the hole system of other coordinate positions should be processed, which can eliminate the error caused by repeated positioning. Improve the coaxiality of the hole system. Choose to determine the tool point and tool change point, once determined, it is not suitable to change.