How to produce screws?

1. Wire drawing machine: used to process the raw materials into the initial shape of the screw through the wire drawing process.

2. Annealing furnace: annealing the processed screw raw materials to improve their mechanical properties.

3. Cold heading machine (large-size bolts, such as M8 and above external hexagon)/heading machine (small-size self-tapping screws, such as 3~6): used to form the head of the screw. Mainly using carbide molds

4. Thread rolling machine: thread rolling the screw head to form threads. Screw tungsten carbide mold

5. Pickling tank: used to pickle the screws to remove surface oxides and detect quality.

Inspection equipment includes:

1. Projector: used to check the size and shape of the screws.

2. Optical sorting machine: select screws of qualified quality through optical detection technology.

3. Salt spray spray machine: used to conduct salt spray corrosion tests on  to evaluate their corrosion resistance.

4. Metallographic microscope: used to observe the microstructure of the screw material.

5. Tensile machine: used to test the mechanical strength and durability of screws.

In the process of producing screws, first of all, special screw production equipment and tungsten carbide screw molds are needed. Ordinary heading machines can be used for heading, but in the thread rolling stage, special thread rolling machines are needed to handle combination screws, because they need to combine screw. with spring washers and flat washers for thread rolling. At this time, the automatic washer inserting machine is particularly important. It can insert spring washers and flat washers on the screws, and roll the threads through the automatic mechanism to ensure that the spring washers are fastened to the screws to form a complete combination screw.