Stamping Dies Basic: The Complete Guide  

1. What is the Stamping Die?
2. Types and Applications of Stamping Die
3. Single Die vs Progressive Die vs Compound Die
4. The Structure and Function of Stamping Die
5. The Materials of Stamping Die
6. The Design Processes of Stamping Die
7. The Processing Methods of Stamping Die

What is the Stamping Die?

Stamping die is a common type of die, in which metal or non-metal sheets are put into the die at room temperature and pressed by a press machine to separate or deform the sheet and eventually make the required parts.

Types of Stamping Die

According to the classification of process combination degree, a stamping die can be divided into four categories: single tool, compound tool, progressive tool andtransfer tool.

Applications of Stamping Die

Custom metal die stamp is the basic process equipment for industrial production. In electronics, automobiles, motors, electrical appliances, instruments, meters, household appliances and communications products, 60% to 80% of mirco metal parts are formed by high precision stamping dies.

Single Tool vs Progressive Tool vs Compound Tool

Single Stamping Die

Definition: A tool that can only complete one stamping process in one stroke of a press, such as punching, blanking, bending, deep drawing, etc.

Features: Simple structure, low cost, suitable for small or large batch production of automobile panels.

Progressive Tool

Definition: A tool that completes several stamping processes simultaneously at different positions of the die in one stroke of the press. The different die stamping process of the same part completed by the continuous tool is arranged in a certain order in the feeding direction of the die at certain step distance, and one or several stamped sheet parts are obtained in one stroke of the press.

Features: Multi-process die; It can include multiple proces

ses such as punching, bending, forming ,etc in a die with higher production efficiency than composite die.

Compound Tool

Definition: A tool with two or more stations in the feed direction of the blank that complete several die stamping processes at the same position in one stroke of the press.

Features:

• High precision of punching parts and the relative position of the inner and outer shape are consistent;
• Can make full use of short materials and leftover materials.

According to the classification of process properties, it is divided into blanking die, bending die, drawing die, forming die, riveting die.

• Blanking Die: It is a die that separate the materials along aclosed or open contour. Such as blanking die, punching die, cutting die, incision die, trimming dies,
• Bending Die: It is a die that bends and deforms sheet blanks or other blank along a straight line (bending line) to obtain a workpieces with a certain angle and shap
• Deep Drawing Die: It is a die that make the blank of the sheet into an open hollow part, or further change the shape and size of hollow parts.
• Forming Die: It isa die that directly copies and forms the blank or semi-finished workpiece according to the shape of the convex and concave die, and the material itself only produce local plastic deformation. Such as bulging die, shrinkage die, flaring die, undulating forming die, flanging die, plastic die and so on.
• Riveting Die: It is a die that useexternal forces to connect or overlapthe participating parts in a certain order and way to form a whole.

The Materials of Stamping Dies

The selection of precison stamping die material should consider the batch production of stamping parts. If the batch is not large, there is no need to choose a die material with a long life; Thus, We should consider the material of stamping parts. Different materials are suitable for different mould materials.

At present, most of the materials for manufacturing stamping die are mainly steel. The kinds of materials commonly used for working parts of the die are:

• Carbon tool steel
• Low alloy tool steel
• High carbon high chromium or medium chromium tool steel
• Medium carbon alloy steel
• High speed steel
• The matrix steel
• Carbide
• Steel bonded carbide and so on.

The Design Process of Stamping Dies

Specifically, We can divided into four main stages: process design, layout, outline design, structure design and parts design.

• Process Design: It is to analyze the forming processes of the product parts one by one to determine the processing technology scheme of the product parts.
• The layout and outlinedesign are based onthe premise that the process design is feasible,specifically determine the process plan and basic structure of the mold when processing parts.
• Structural design and parts design are specifically designed for the formal production of the progressive mold.

The Methods of Stamping Dies Processing

• Turning processing: Used for processing rotating parts, such as guide posts, guide sleeve, brace head, flange, thread and so on.
• Drilling processing: Used for processing threaded bottom holes, positioning pin holes, thimble holes, etc.
• Milling processing: It is mainly use a milling cutter to milling the plane.
• Grinding: It is mainly use grinding wheel to grind the surface of the workpiece.
• Planing processing: It is mainly planing the surface of the workpiece with a planing knife.
• Special processing: It is use of electrical energy, chemical energy and other mold processing methods directly.
• CNC processing: Control the machine tool through digital information to, so that the relative movement between the machined parts and tool meets the requirements.

Conclusion

There are still many problems in stamping dies. In actual project, we have to choose different stamping die according to the actual needs of the product. Such as part size, dimensional accuracy requirements, parts complexity, actual demand, etc. The production process of die is complex.

The Best Precision Metal Stamping Manufacturer in China

With 30 years of experience in the precision metal stamping industry, Heju Stamping has helped many industries to solve stamping problems around the world. Therefore, If you have a project under development or production problems, please contact us. We will use years of stamping experience and the most advanced stamping die technology for your service.