A. ensure the quality
Rough cutting allowance, cutting force, cutting heat and clamping force are also big, blank itself has internal stress, stress redistribution within the process, will have effect for large deformation of the workpiece. Divide the processing stage, errors and deformation of rough, through correct semi-finishing and finishing, and gradually increase the part accuracy and surface quality.
B. Organization of production
Each processing phase requires different production conditions, such as precision machining requires constant cleaning of the production environment. Divide the processing stage, can be arranged in various stages between heat treatment processes. Precision parts, arrange for stress aging treatment after roughing can reduce the effect of internal stress on finishing; arrangements after the semi-finish quenching is not only easy to reach parts of the performance requirements, and quenching deformation can be amended by finishing operations.
C. rough defects found
Rough surfaces most of the margin has been removed, when found to be defective can be discarded or patched in a timely manner, to avoid loss of finishing work. Precision mechanical machining turning, boring, precision milling, grinding and polishing processes, parts the use of this method.
