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Production process of stainless steel self tapping screws

Production process of stainless steel self tapping screws

1. First of all, the production of stainless steel screws should first have raw materials. The raw materials of screws can be purchased directly from the wire rod factory, because the wire rod factory has already coiled the wire rod. The wire rod can be used directly after the screw manufacturer purchases it. Therefore, the first step in production is to select the wire grade and specification of stainless steel tapping screws. Different specifications of stainless steel tapping screws use different stainless steel screw wires. So we should choose the screw wire according to the screw diameter. At present, wire rods mainly include stainless steel, copper and iron!

2. Annealing: in order to eliminate the internal stress of stainless steel screw wire processing and increase its castability, annealing refers to the annealing of screw wire. It can make the screw wire better to produce screws, so that the screw wire has better upsettability

3. Heading and rolling of stainless steel self tapping screws, the process of which is mainly to complete the shape of the screws and to shape the teeth. Heading refers to the cold heading forming of the screw head. Generally, stainless steel screw manufacturers use a heading machine to complete this work. It is important to know that not all screws can be produced with a single tapping machine, and different specifications of stainless steel self tapping screws use different tapping machines.

4. Tooth rubbing is also called thread rubbing. Put the stainless steel tapping screw with the head into the tooth rubbing machine for tooth rubbing, so that the stainless steel tapping screw has tooth lines. For example, stainless steel self tapping screws are rolled into self tapping teeth, while machine thread screws will be rolled into machine thread teeth.

5. Heat treatment process. Generally, only carbon steel screws will use the heat treatment process to strengthen the hardness of the screws. This is also the process that can be carried out only when customers have requirements. Some customers have high requirements for the strength grade of the screws, that is, they have requirements for the hardness of the screws. At this time, we need to know about the surface heat treatment of carbon steel screws. The purpose of hardening is to strengthen the tensile capacity of screws

6. Electroplating is mainly carried out according to the needs of customers. Generally, stainless steel self tapping screws do not undergo any electroplating treatment without special requirements. In order to make the screws more beautiful, or change the color of the screws to match the appearance of the products, or increase the rust resistance of the screws, the surface treatment process is required. The common surface treatment of stainless steel self tapping screws include environment-friendly zinc plating, nickel plating, Dacromet, etc,

7. After surface treatment and electroplating treatment, the whole stainless steel self tapping screws have basically completed the manufacturing process. Packaging shall be carried out according to the manufacturer's standards or the customer's requirements. In order to quickly obtain all the information about the screws outside the packaging, the screw manufacturer will generally write the corresponding information on the screw packaging bag, such as the screw specification, head size, head thickness, screw material, strength grade, and surface treatment process. This is not only helpful for screw manufacturers to store excess screw inventory, but also convenient for customers to learn about screw information