How to ensure the dimensional tolerance of parts processing

How to ensure the dimensional tolerance of parts processing

The function of each part on each machine must be unique, just like airplanes, ships, cars, robots, etc., if one of the parts fails, it will cause it to fail to operate. Therefore, the quality and accuracy of parts must be well controlled in order to play a role for the entire machine.

SHD Precision attaches great importance to this point, and has very strict requirements on the quality and accuracy of parts processing. On the premise of complying with the selection standards for parts processing tolerances, follow-up inspections are added, 6 inspection procedures + three-dimensional full inspection and shipment, and the processing of parts The quality provides a guarantee!

One. Tolerance selection principle

The essence of selecting the tolerance level is to correctly solve the contradiction between the use requirements of machine parts and the manufacturing process and cost. The principle of selecting the tolerance level is to choose the lower tolerance level as much as possible under the premise of meeting the requirements of the parts. Accuracy requirements should be coordinated with the possibility of production, that is, reasonable processing technology, assembly technology and existing equipment should be adopted. However, if necessary, methods of improving equipment accuracy and improving the process should be adopted to ensure the accuracy of the product. It is extremely important to select the appropriate tolerance class for the matching dimensions. Because in many cases, it will determine the working performance, service life and reliability of the matching parts, and at the same time determine the manufacturing cost and production efficiency of the parts.

Two. The six inspection procedures of SHD precision parts processing are:

1. Incoming material inspection (the spectrometer detects the composition of the material to control the defect at the source)

2. Operator self-inspection during processing (each operator self-inspects each size of the product he processes)

3. Submit the first batch of parts for inspection (after the first part is passed by a professional quality engineer, the subsequent batch processing can be carried out)

4. Inspection by quality inspectors (quality inspectors conduct sampling inspections on products processed by machines from time to time)

5. Full inspection before surface treatment (after mechanical processing, conduct a comprehensive inspection of the product, and then carry out surface treatment after passing)

6. Full inspection before shipment (after surface treatment, the quality inspection engineer will conduct a full inspection and issue a test report)

Three. High-Technology testing equipment

SHD’s precision parts processing not only has 6 inspection procedures, but also is equipped with high-end inspection equipment. For products with high requirements from customers or high product precision, three-dimensional full inspection will be arranged. In addition to spectrometers and three-dimensional elements, Zhuanxin Precision also has two-dimensional elements, height gauges, hardness testers, needle gauges, micrometers, etc., and arranges regular inspections, maintenance, and debugging for each type of testing equipment, and strives to achieve the best accuracy requirements.