Needle punch、Double section thimble、Mould Manager、Die pin、Flat thimble supplier

1. Wire drawing and cutting

The raw materials that have passed the laboratory test are drawn into the required diameter size through a wire drawing machine, and then cut into a rod-shaped blank with a fixed length.

2. Heat treatment

Before the heat treatment, the blank of the punching needle is adjusted and straightened on the straightening platform with a dial indicator, and then it is heated to 800-1300 degrees Celsius in a high-frequency electric furnace or a salt bath furnace, and stays for 2-5 minutes After oil-cooling hardening, the needle tip hardness can reach Hv590-800 after fine quenching heat treatment. Then, it is subjected to low temperature tempering treatment.

3. Grinding

Clamp the punching needle on the spring chuck of the machine tool, and perform grinding and forming according to the size requirements of the various tip base angles of the punching needle.

4. Polishing

Polishing is to clean up the oil stains and rust on the surface to clean the surface.

5. Inspection and storage

Inspection is carried out according to the required index, and qualified ones can be packed into storage.