The division of precision machining stages should not be absolute, and should be flexibly controlled based on the quality requirements, structural characteristics, and production guidelines of the parts. Pudson focuses on precision machining and specializes in precision range of 0.005-0.002mm. We have mature and complete solutions for various aluminum alloys, engineering plastics, stainless steel, titanium alloys, high-temperature resistant materials, and high hardness materials.

1. To ensure the quality of processing. When rough machining workpieces, the removed metal layer is thick, the cutting and clamping forces are high, and the cutting temperature is high, which can cause significant deformation. If the machining stages are not divided and rough machining and precision machining are mixed together, machining errors caused by the above reasons cannot be avoided. According to the processing stage, machining errors caused by rough machining can be corrected through semi precision machining and precision machining to ensure the machining quality of the parts.

2. Reasonable use of equipment. The rough machining allowance is large, the cutting amount is large, and machine tools with high power, good rigidity, high efficiency but low precision can be used. Precision machining has low cutting force and minimal damage to the machine tool. Use high-precision machine tools. This fully utilizes the respective characteristics of the equipment, which can not only improve the productivity of precision parts processing, but also extend the service life of precision equipment.

3. Easy to detect defects in the blank in a timely manner. Various defects in the blank, such as porosity, sand inclusions, and insufficient allowance in castings, can be detected after rough machining, making it easy to repair or decide to scrap in a timely manner to avoid further processing and waste.

4. Easy to arrange the heat treatment process. After rough machining, it is generally necessary to arrange stress relief heat treatment to eliminate internal stress. Before precision machining, final heat treatment such as quenching should be arranged, and its deformation can be eliminated through precision machining.

When the machining quality of precision parts is not high, the rigidity of the workpiece is good, the precision of the blank is high, the machining allowance is small, and the production program is not large, there is no need to divide the machining stages. For heavy workpieces with good rigidity, due to the time-consuming clamping and transportation, all rough and fine machining are usually completed in one clamping. For workpieces that have not been divided into machining stages, in order to reduce the impact of various deformations generated during rough machining on machining quality, after rough machining, the clamping mechanism is released and held for a period of time to completely deform the workpiece. Then, after heating, the clamping force is reduced, and the machining is completed by re clamping the clamping force.