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What surface defects are there in the manufacturing process of screw fasteners

Release time:

2023-01-30 15:34

What surface defects are there in the manufacturing process of screw fasteners

We can see the screw fasteners in all products. Most of the screw fasteners are head type, with uniform threads without burrs and bright appearance. But are all screw fasteners like this? Of course not. During the production of screw fasteners, poor technology or machine adjustment will cause many surface defects. The most common surface defects of screw fasteners are as follows:

1. The screw fastener is eccentric. This error is usually caused by the problem during the second punch installation or the adjustment error of the screw production machinery.

2. The phenomenon of skewed head often occurs, which is the most troublesome problem for screw technicians. It is mainly caused by the error of machine adjustment and the installation error of one punch, which leads to the phenomenon of screw fastener skewing.

3. The head is out of round. The main reason for the head out of round is that there is a problem in the punching and grinding. The material quality of the punching and grinding tool is poor. The grinding tool is worn after some screws are tightened, resulting in the head out of round.

4. Cracks and double layers, most of which are caused by the work not done well during molding. The second link is that there is a problem in the process of tooth formation,

The main performance is as follows: First, there are cracks in the processing. In addition to the problem of adjustment, there are also problems with the tooth plate. Second, when the fire is burning, the spacing is too large, and the time is not controlled properly. The tail is skewed or broken, and the debugging machine is too tight or too loose. Such operations are problematic, which can easily cause surface defects of screw fasteners. Phenomenon 4: skewed rod or rough tooth base. This needs to see whether the distance between the dental plates is not adjusted properly or whether there is a correction problem.