This pressure riveting screw nut phenomenon not normally
There are two reasons: first because the fastener product itself quality problems;
Second because the installation fasteners damaged screw thread, the thread of the phenomenon to appear.
For one, the quality problem of pressure riveting screws fastener itself
We need to monitor what:
1 our products materials and specifications, whether it meets our requirements of the drawings.
Thread 2 products whether thread chaos, thread of turbulence situation.
3 for the thread of the inner diameter and outer diameter, we measured with micrometer, see its accuracy whether standard.
4 for screw fasteners products for the thread, we need to measure 6h regulatory teeth, to see when the precision standard.
5 detect the smoke test index time standard, we need to be tested for smoke machine.
Two, the pressure riveting screws during installation, whether produced damage to the product thread
We need to pay attention to:
1 of our fastener pressure riveting, whether there is pressure slanting or flattening phenomenon.
2 in the riveting operation is completed, the surrounding pressure riveting piece whether there is convex or concave phenomenon.
3 in the riveting operation is completed, whether due to pressure riveting piece applied pressure is too large, caused by the external thread of the screw of turbulence phenomenon.
4 we in pressure riveting ago whether take the wrong does not comply with the screw thread specification or material products.