2 holes sewing design metal plate for quality check

Checking the quality of 2 holes sewing design metal plate requires a number of key aspects to ensure that they meet design specifications and usage requirements. The following are systematized inspection steps and key points. 2 holes sewing design metal plate for quality check.

I. Appearance Quality Inspection

Surface Defect Detection

Scratches and Knocks: Use visual inspection or magnifying glass to observe whether there are obvious scratches, dents or knock marks on the surface.

Corrosion and oxidation: check the surface of the metal plate whether there is corrosion, oxidation layer or coating peeling phenomenon, especially around the edges and holes.

Flatness and deformation: Place the metal plate on a flat countertop and observe whether there is warping, wavy or local deformation.

Hole Processing Quality

Hole Wall Smoothness: Check whether the inner wall of the hole is smooth and free of burrs, cracks or processing marks.

The edge quality of hole: the edge of the hole should be free of flying edge, curled edge or sharp edges, if necessary, you can use your fingers to feel lightly.

Hole consistency: Compare the diameter, shape and position of two holes to ensure that there is no obvious difference.

II. Dimension and Tolerance Check

Overall Dimension Measurement

Use vernier calipers, micrometers or Coordinate Measuring Machine (CMM) to measure the length, width and thickness of the metal plate to ensure compliance with the tolerance requirements of the design drawings.

Hole Size and Positional Accuracy

Hole Diameter Measurement

Measure the diameter of a hole using a hole gauge or inside micrometer and compare it to the design value.

Hole Distance Measurement

Measure the center distance between two holes to ensure compliance with design tolerances.

Hole position deviation

Check the position deviation of the holes relative to the edge of the metal plate or the datum line to ensure that it is within the allowable range.

III. Material and Performance Inspection

Composition and Properties Of

Material Verification

Please confirm that the material of the metal plate meets the design requirements through spectral analysis or chemical composition testing.

Mechanical Properties

Conduct tensile test, hardness test or impact test on metal plate to evaluate its strength, toughness and ductility.

Corrosion Resistance Test

Salt Spray Test

Place the metal plate in a salt spray test chamber to simulate a corrosive environment and observe its corrosion resistance.

Coating adhesion test

If there is a coating on the surface of the metal plate, it is necessary to carry out the scratch test or tape peeling test to ensure that the coating adhesion is up to standard