Description on the Quality Detection of Combination Screw

source：    Author：Catherine    views：206    Release time：2014-12-04

First, the quality detection of combination screw should begin from wire rod of the screw. The quality of precision screw have a direct relationship with the wire rod of screw. The screw made by good screw wire rod looks more beautiful. Good screw wire rods are generally not found this situation, such as the broken screw head, bad thread, and so on.

The second is about the detection of screw heading forming. In the process of the bolt forming, the mold that produce the screw should be detected firstly. Only good mold can make a good screw products. And then is about the detection of the machine that produce the screw, which is helpful for the safety and smooth production. The appearance test of forming screw is to see if there are any burrs. The size and length of the forming screw should also be tested, in order to see if the size is accord with the national standard or the customer's specific requirements.

Third, the quality detection of combination screw should on the screw thread rolling. Of course, the first of screw thread rolling is the tooth plate. And then the thread pitch should be tested, too. It also should be accord with the national standard or the customer's specific requirements.

Finally, the quality detection of combination screw should on the color test and salt spray test for the plated screw. And then is the combination screw shipment detection. The method is to pick out the unqualified screw. We should give customers the best quality screws and ensure the quality of the screws.