Briefly describe how to control the quality of the pressure riveting process

1. The processing content of the pressure riveting process: pressure riveting nuts, screws, studs and customized hardware pressure riveting parts (guide pins, positioning support columns, etc.), electrostatic hand bowl holders, pressure riveting wrenches, etc.;

2. For pressure riveting parts close to the edge of the product or the periphery of the hole, the edge of the product or the periphery of the hole will be significantly deformed after being riveted. According to the deformation and expansion of the material, take corresponding measures (such as shaping/or polishing) To meet the drawing size and appearance requirements.

3. After pressing riveting, there must be no crimping or deflection, and it must be ensured that the thread and the corresponding hole are concentric.

4. The material, specifications and models of the pressure riveting parts must be consistent with the drawings, and the specifications must not be pressed;

5. After pressure riveting, the surrounding area of u200bu200bthe pressure riveting part shall not be obviously deformed or convex or concave, and there shall be no obvious imprinting or stamping that cannot be covered by the obvious surface treatment.

6. After pressure riveting, the pressure riveting parts shall not be slanted and shall not be loose or falling off, and their firmness must be tested; the push-pull force and torque value must meet the requirements of the PEM regulations of the pressure riveting parts. (Guide: Failure Analysis of Cylinder Head Bolt Fracture)

7. Before pressing riveting, it is necessary to confirm in time whether the external markings of the pressing riveting parts used in the production line and the physical objects (materials, specifications and models) in the packaging bag meet the requirements of the drawings, and whether there is mixing in the packaging bag.

8. Pay attention to the pressure riveting parts that are near the bending edge or the mold forming edge, especially the thread and appearance (deformation).

9. After pressing riveting, conduct random sampling inspections on the material, specifications, models and threads of the pressure riveting parts on the product, whether they meet the requirements of the drawings, whether there is pressure leakage, wrong pressure, wrong position pressure, pressure mixing and other phenomena.

10. After the pressure riveting, the thread of the pressure riveting parts must be qualified, pass the regulation, and stop the regulation.

11. After the pressure riveting is completed, it is necessary to check whether the flatness is within the range. If it exceeds the standard, it needs to be transferred to the fitter for shape correction.

12. There are a large number of pressure riveting studs and screws for a single product. Some products will make special jigs for pressure riveting, and a special inspection jig is required to check whether there are any defects such as leakage or wrong pressure.

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