Structure and Characteristics of Punch in Stamping Die Manufacturing

In the field of metal processing, stamping die is an important tool that can form the metal material into the desired shape and size by pressure. As the core component of the mold, the structure of the punch and its characteristics have a decisive influence on the whole processing process.

The punch is the main working part of the stamping mold, which is in direct contact with the material to be processed and causes plastic deformation of the material under pressure. The design of the punch must meet the precision requirements of the product, and at the same time, it should also take into account the characteristics of the material, the characteristics of the stamping process and the use of the environment and other factors.

The structure of punch usually includes head and shank. The head is the part of the punch directly involved in stamping, and its shape and size depend on the shape and size of the product. The material selection and heat treatment process of the head are also important factors to be considered in the design, because they directly affect the wear resistance and service life of the punch. The shank is the part of the punch that connects with the stamping equipment, and its structural design needs to take into account the interface requirements of the equipment and the force transmission effect.

The characteristics of punches are mainly reflected in the following aspects:

1. High precision: in order to ensure the precision of processed products, the design and manufacture of punches must achieve very high precision. This includes not only the shape and dimensional accuracy of the head, but also the concentricity and perpendicularity of the head and the shank.

2. High hardness: punches need to withstand great pressure when working, so its material must have enough hardness and strength. At the same time, the increase of hardness also helps to improve the wear resistance of the punch, thus prolonging its service life.

3. Wear-resistant: Since the punch is in direct contact with the material to be processed, it will be worn out in the course of use. In order to minimize such wear, the material of the punch usually needs special heat treatment process, such as carburizing, quenching, etc., to increase the wear resistance of its surface.

4. High temperature resistance: punches working in some high temperature environments also need to have good high temperature resistance. This is usually achieved by selecting special materials or special heat treatment processes.

5. Easy to replace: In order to facilitate maintenance and replacement, the shank of the punch is usually designed as a removable type, so that when the punch is damaged or need to replace the shape of the product, the punch can be quickly replaced without the need to replace the entire mold.

Punch is a key component in the stamping die, and its structure and characteristics directly affect the performance and service life of the die. Therefore, the design and manufacture of punches need to take into account a variety of factors, including the precision requirements of the product, the characteristics of the material, the characteristics of the process and the use of the environment. Only in this way can we manufacture punches with excellent performance and long service life, so as to improve the production efficiency and quality of products.