What are the classification of stamping dies according to the processing method of the product?

Stamping die - in cold stamping processing, a special process equipment that processes materials (metal or non-metal) into parts (or semi-finished products), called cold stamping die (commonly known as cold stamping die). Stamping is a pressure processing method that uses a die mounted on a press to apply pressure to the material at room temperature to produce separation or plastic deformation, so as 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 design and manufacture of molds. The level of mold design and manufacturing technology is one of the important indicators to measure the level of product manufacturing in a country, which determines the quality, efficiency and development ability of new products to a large extent.

There are many forms of stamping dies, which can generally be classified according to the following main characteristics:

1. Classification according to the nature of the process:

1) Punching die along a closed or open contour line to create a separate mold for the material. Such as blanking die, punching die, cutting die, cutting die, cutting die, trimming die, cutting die, etc.

2) Bending die A mold that makes the sheet blank or other blanks produce bending deformation along a straight line (bending line), so as to obtain a workpiece with a certain angle and shape.

3) Drawing die is a mold that makes the blank blank into an open hollow part, or makes the hollow part further change its shape and size.

4) Forming die is a mold that directly copies the blank or semi-finished workpiece according to the shape of the convex and concave die in the drawing, and the material itself only produces local plastic deformation. Such as expansion die, shrinking die, flaring die, undulating forming die, flanging die, shaping die, etc.

2. Classification according to the degree of process combination:

1) Single-process die In a stroke of the press, only one stamping process is completed in the mold.

2) Composite die There is only one station, and in one stroke of the press, two or more stamping processes are completed at the same time on the same station.

3) Progressive die (also known as progressive die) In the feeding direction of the blank, there are two or more stations, in one stroke of the press, in different stations to complete two or more stamping processes one by one. Generally speaking, the types of molds mainly include hot work dies (including die-casting dies, hot extrusion dies, machine forging dies, hammer forging dies, hot stamping dies - also known as hot cutting dies), cold work dies (including cold punching dies, cold drawing dies, cold extrusion dies, cold heading forging dies, etc.), plastic molds, powder metallurgy pressing molds, glass molds, etc. Mold is a kind of process equipment necessary to complete product production.

According to the different materials formed, molds can be divided into hardware molds, plastic molds, and their special molds.

Hardware molds are divided into:

Including stamping dies (such as punching dies, bending dies, drawing dies, turning dies, shrinkage molds, undulating dies, bulging dies, shaping dies, etc.), forging dies (such as die forging dies, upsetting forging dies, etc.), extrusion dies, extrusion dies, die-casting dies, forging dies, etc.

Non-metallic molds are also divided into:

Plastic molds and inorganic non-metallic molds.

According to the different materials of the mold itself, the mold can be divided into:

Sand molds, metal molds, vacuum molds, paraffin molds and so on. Among them, with the rapid development of polymer plastics, plastic molds are closely related to people's lives.

Plastic molds can generally be divided into: injection molding molds, extrusion molding molds, gas-assisted molding molds and so on.

The forming mold has a forming die chamber to complete the forming billet step module, which is called the forming die. The guide mold is called the guide plate mold in which the guide plate is guided. Due to the difficulty of manufacturing the guide plate for punching complex shapes and the easy deformation of heat treatment, this type of mold is only suitable for parts with simple shapes and small sizes.

The guide pillar mold is used for the guide pillar, and the mold for the guide sleeve to guide is called the guide pillar mold, which is reliable, the parts are of high precision, the mold life is also high, the installation is convenient, and it is suitable for mass production. However, the mold processing and manufacturing are complex and the cost is high. Low Melting Alloy Die Die SteelThe working part is a mold made of a low melting point alloy (mainly bismuth-tin alloy), which is called a low melting point alloy mold.

This kind of mold has the characteristics of remelting and remanufacturing. The compound mold uses a stroke of the press to complete more than two processes at the same position of the mold, which is called a composite mold.

The main parts of the stamping die are: punch, die, punch fixed plate, base, upper support, backing plate, and stripper.

The punch is used to punch the hole or inner shape of the part; The die is used to punch the shape of the part; The punch fixing plate is used to fix the punch; The base is used to fix the die; The upper support is used to fix the punch, and is also used to connect the die to work together with the punch slider; The stripper is used to remove the stamped parts from the die. The backing plate is used to pad the back of the punch to prevent the punch from sitting back and increase the punching force of the punch.