The key points of quality control during the processing of stainless steel precision parts

Dimensional accuracy control:

     Measurement and adjustment during processing: During the processing of stainless steel precision parts, the dimensions of the parts should be measured regularly. For example, during turning or milling, after every few processing steps, the key dimensions of the parts are measured using measuring tools, and the processing parameters or tool compensation are adjusted in time according to the measurement results. For high-precision dimensional requirements, an online measurement system can be used to monitor the dimensional changes of the parts in real time during the processing and automatically adjust the processing parameters.

    Tolerance control strategy: According to the design requirements of the parts, the dimensional tolerances are set reasonably. For the matching dimensions, the tolerance range should be strictly controlled to ensure good matching between the parts. For example, when manufacturing the inner and outer rings of stainless steel precision bearings, the dimensional tolerances of the inner and outer rings should be controlled within a very small range to ensure the rotation accuracy and service life of the bearings.

    Shape accuracy control:

    Process planning and optimization: Before processing, the shape accuracy requirements of the parts should be analyzed and a reasonable processing technology should be formulated. For example, for stainless steel precision parts with complex curved surfaces, CNC processing technology is used to ensure the surface shape accuracy of the parts through precise programming and tool path planning. During the processing, attention should be paid to controlling the cutting force and processing deformation to avoid distortion of the part shape.

     Detection and correction methods: Use precision measuring equipment to detect the shape accuracy of parts, such as using a roundness meter to detect the roundness of shaft parts, and using a profiler to detect the contour shape of parts. If it is found that the shape accuracy of the parts does not meet the requirements, mechanical processing (such as fine grinding, fine milling) or special processing (such as electrolytic processing) can be used to correct it.

   Surface quality control:

   Cutting parameter optimization: Reasonable cutting parameters are the key to ensuring the surface quality of stainless steel precision parts. The roughness of the part surface can be reduced by reducing the cutting speed, feed rate and cutting depth. For example, when milling the surface of stainless steel precision parts, appropriately reducing the cutting speed and feed rate can reduce the surface roughness from Ra1.6μm to Ra0.8μm.

    Surface treatment process: After the processing is completed, the surface treatment process can be used to further improve the surface quality of the parts. For example, polishing stainless steel precision parts, through mechanical polishing, chemical polishing or electrolytic polishing, remove the tiny flaws on the surface of the parts, so that the surface roughness meets higher requirements. At the same time, surface coating technology, such as chrome plating and nickel plating, can also be used to improve the wear resistance and corrosion resistance of parts.

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