What are the extra long machine screws quality inspection methods?

The first test of an electrical screw should be made from the wire of the screw. The quality of fine extra long machine screws is directly related to the wire used to produce them. Good screws, wires and opening screws are more beautiful. What screw head blowout, what bad dental floss. Good thread screws usually do not find this condition.

Next is the test of extra long machine screws head forming. In the screw forming aspect, the first is to test the production screw mold. With good forming ability, can be made into high-quality screw products. Screw machine detection in production is conducive to safe and stable production. Inspect the appearance of the forming screw for burrs and check the size and length of the forming screw. Check to see if these dimensions meet national standards or specific customer requirements.

Screw friction test. Of course, the head of the extra long machine screws is a toothed plate. All the teeth that come out of a good dental lamina must be able to pass the rule or not. No, no, no. The other is to test the pitch. It is also necessary to meet the national standards and specifications of screws or customer requirements. Color detection and salt spray testing are performed on electroplated screws. Check the color of the electroplating screws. The smoothness of the screw surface. Salt spray test to determine how long the screw will rust or how many hours the salt spray screw will rust. After that, we checked the delivery of the screws. The solution is to pick out the defective screws. To provide customers with the best quality screws. Ensure screw quality.

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