What is non-standard parts machining process

In non-standard parts machining process, is based on the most important, precision machinery parts processing, too, is always first processing benchmark, then other surface processed with fine reference positioning. Next, we came to me in detail. For body parts, generally in the main hole of crude benchmark processing plane, take the essence of plane datum processing hole system; For shaft parts, general is outside the circle for the benchmark crude processing center hole, again with center hole cylindrical benchmark for fine processing, face and other surface. If you have several benchmark, it should be in accordance with the order of the datum transformation and gradually improve the machining accuracy of the principle to arrange on the surface of the base and the main processing. For a artifacts, such as enclosure, stents and connecting rod should be flat after machining hole. Because flat contour level off, the area is large, first machining plane to plane positioning hole, processing can be ensured when the hole has a stable and reliable positioning benchmark, and to ensure the position accuracy of hole and the plane. A component usually consists of multiple surface, the surface processing is generally need in stages. When arranging precision machinery parts processing and processing order, should be set up on the surface of the rough machining, according to need to arrange in turn among semi-finishing, finally arrange finishing and light the whole processing. For high accuracy requirement of the workpiece, in order to reduce the influence of deformation caused by rough machining to finish machining, rough and finish machining usually should not be continued, and in every stage, the appropriate time interval. Non-standard parts processing cutting process to arrange the total principle is: to prepare the work must be in front of the back of the work, lay a solid foundation, completes the service. Non-standard parts processing specific work principle can be divided into four aspects: part of the main surface is generally the surface of the processing precision and surface quality request is higher, their processing quality had a great influence on the quality of parts, the machining process is often more, so should be arranged on the surface of the main processing, and other surface processing properly arrange alternate between among them. Assembly base level, the working surface is considered the main surface, and the keyway, the light of the fastener hole and screw hole as a secondary surface.
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