During the hardware processing, the production and processing stages of hardware processing are divided into the following stages:
(1) Ensure the processing quality of hardware accessories
During rough machining of hardware parts, the metal layer cut out is thick, the cutting force and tightening force are large, and the cutting temperature is high, which will cause large deformation. According to the processing stage, the processing error caused by rough processing can be corrected by semi finishing and finishing, so as to ensure the processing quality of parts.
(2) It is convenient to find the defects of hardware parts processing blanks in time
Various defects of the blank (such as porosity, sand inclusion and insufficient allowance of the casting) are found after rough machining, which is convenient for timely repair or scrapping to avoid unnecessary waste caused by further processing.
(3) Easy to arrange heat treatment process
After rough machining, stress relief heat treatment shall be arranged to eliminate internal stress. Before finishing, final heat treatment such as quenching shall be arranged. The deformation caused by heat treatment can be eliminated by finishing.
(4) Reasonable use of hardware accessories processing equipment
The rough machining allowance is large and the cutting amount is large. The machine tool with high power, good rigidity, high efficiency and low accuracy can be used. The precision machining has small cutting force and little damage to the machine tool. High precision machine tools are adopted. This gives full play to the respective characteristics of the equipment, which can not only improve productivity, but also prolong the use of precision equipment
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