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

Punching needle is similar to other mechanical tools and parts, basically through physical changes, resulting in deformation, but the material remains unchanged

Manufacturing process of punching needle

1. Wire drawing and cutting

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

2. Heat treatment

Before heat treatment, the punching needle blank is straightened on the straightening platform with a dial indicator, and then it is put into a high frequency electric furnace or salt bath furnace to heat to 800 ~ 1300 ℃ for 2 ~ 5 minutes. After oil quenching and fine quenching, the hardness of the needle tip can reach hv590-800. Then it is tempered at low temperature.

3. Grinding

The punching needle is clamped on the spring collet of the machine tool, and the grinding process is carried out respectively according to the angle and size requirements of various sharp bases of the punching needle.

4. Polishing

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

5. Inspection and warehousing

According to the required index for inspection, qualified can be put into storage.