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When it comes to punching needles, I have to explain the stamping die. Punching needles are indispensable accessories when the stamping die is working. They are replaceable die consumables. They are installed on the stamping die for continuous punching and punching operations, so that they are The processed materials are separated or plastically deformed to obtain the required finished or semi-finished products.

Punch pin is also known as punch punch. The English name is punch-pin, which is installed on the stamping die to perform continuous punching and punching operations to separate or plastically deform the processed material to obtain the required finished or semi-finished products.

Stamping dies and various

Stamping die

In the cold stamping process, stamping dies process materials (metal or non-metal) into parts (or semi-finished products). Stamping is a pressure processing method that uses a mold installed on a press to apply pressure to the material at room temperature to cause separation or plastic deformation to obtain the required parts.

After the mold installed on the press is equipped with mold parts such as a punching pin, it directly contacts the material (metal or non-metal), causing the material to separate or plastically deform to obtain the required parts.

Stamping die is an indispensable process equipment for stamping production and is a technology-intensive product. The quality, production efficiency and production cost of stamping parts are directly related to the precision and quality of mold design and mold parts.

Punching needle type

According to different material selection, the punching needle can be divided into SKD punching needle\SKH punching needle\ASP punching needle

SKD punching needles are made of SKD special mold steel, which can have various shapes according to the needs of production.

SKH punching needles, ASP punching needles, tungsten steel punching needles and high-speed steel punching needles are different in appearance because of different materials. Tungsten steel punching needles look darker in color, while high-speed steel punching needles are brighter.

The guide punch is also called the guide punch for short. According to the needs of the punching machine, it can have various shapes, such as A type B type HB type TAPP type TBPP type and so on.

The son-mother punch is also called the son-mother punch for short. There is a small protrusion on the top of the punch. I dont know the origin of the name. Perhaps it is because of the protrusion on the top of the punch. Letter punching needles can be divided into standard type A type JSBP type and other models.

There are also tooth-drawing punches, inspection tips, hexagonal punches, oval punches, forming punches, fan-shaped punches, special-shaped punches, high-speed steel punches, tungsten steel punches, etc. You can search for these products through Baidu search The picture can be understood.

Processing and manufacturing of punch needles

Punching needles are similar to other mechanical tools and parts. They basically undergo physical changes and deform but the material remains unchanged.

The manufacturing process of the punching needle

1. Wire drawing and cutting

The raw materials that have passed the laboratory test are drawn into the required diameter size by 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 put into a high-frequency electric furnace or a salt bath furnace and heated to 800~1300 degrees Celsius, staying for 2~5 minutes, After oil-cooled hardening, the needle tip hardness can reach Hv590-800 after fine quenching and 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 shaping according to the requirements of the angle and size of the various tip bases 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.