The quality inspection of screws

For the inspection of screw head forming, in the process of screw forming, the first is the inspection of the die for producing screws. Good screw products can only be made with good molds. It is to test the machine for producing screws, which is conducive to safe and smooth production. The appearance of the formed screw shall be inspected to see if there are burrs, and the size and length of the formed screw shall be inspected. See if these dimensions and lengths meet the national standards or the specific requirements of customers.

The second is the detection of screw rubbing. Screw rubbing teeth first, of course, is the tooth plate. All the teeth rubbed out by a good dental plate should pass the go no go gauge. Go gauge, go, no go gauge. There is also the detection of thread pitch. We should also meet the screw national standard or customer requirements.

Finally, color detection and salt spray test are carried out on the screws returned from electroplating. Look at the color of the screws from electroplating. How smooth is the surface of the screw. The salt spray test detects the rust time of the screw or how many hours the salt spray screw will rust. After that, the shipment inspection of screws was carried out. The method is to select unqualified screws. Send the best screws to customers. Ensure the quality of screws.