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Method for quality inspection of precision stamping parts

source:[seo:selfurl]    release time : 2018-11-18 11:39

Precision stamping parts are commonly used in the industrial field for the processing and production of automotive products. Nearly 60%-70% of the parts in the automobile are stamped parts. Therefore, the stamping technology has a great influence on the overall quality of the car, and at the same time, the productivity And production costs will have a certain impact. Method of testing quality:
1. Inspection of the appearance of stamping parts
The visual inspection of stampings includes the following: burrs, wrinkles, scratches, impacts, mold crushes, indentations, ridge lines, pits, convex hulls, rust, pitting, cracks, thinning, punching Collapse, rounded smoothness, waves, continuous waves, ripples, etc.
2, performance test
The performance test consists of two aspects, one is the rigidity test and the other is the material confirmation. Rigidity test: It is generally carried out by a professional laboratory as a project carried out by the R&D department in a key laboratory. If there is no laboratory, it can be verified by the vehicle road test. Material determination: The material used for stamping parts is defined by the engineering research department, and the process department confirms and modifies the process during the process development, and then executes it after delivery.
The stamping parts production department purchases according to the determined materials, and the materials are tested and performance tested after entering the factory. The materials are qualified for production; the production is determined according to the materials used in the process cards.
Under normal circumstances, the material and material thickness of the stamping parts can be guaranteed without changing, and the performance is not checked during the production process, but the performance of the stamping parts needs to be calibrated within a fixed time.

3. Geometrical inspection of stamping parts
The geometrical dimension inspection of the stampings refers to the geometrical dimensions of the parts on the gage. The parts without the gage are inspected using conventional tools such as steel rulers, vernier calipers, and angle gauges.
4. There is no inspection method for precision stamping parts: For parts without inspection tools, the parts are placed on the platform, the general tools are used for inspection and the relevant data is recorded, and the parts are determined according to the tolerance requirements of the drawings. Whether it meets the standard. There are inspection methods for inspection tools: in the natural state, after the parts are completely positioned by the main and auxiliary positioning pins, it is recorded whether the parts are in close contact with the reference surface. The tolerance of the reference hole is tolerantly managed in accordance with the requirements of the inspection reference book. In the clamped state, confirm that the part is in close contact with the reference surface, and record the gap measurement value in the inspection record when the gap is found. The data collected after the measurement is recorded in the checklist according to the position of the inspection point of the inspection reference book.


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