Stamping Die Structure Instruction Guide

This guide is designed to help beginners who are new to punch press or die-related operations understand the basic die structure and the functions of each component, enabling smoother production operations and easier maintenance troubleshooting in the future.

1. Basic Concept of Dies

A punch press die is a tooling system that utilizes the up-and-down motion of a press machine to perform cutting, punching, and forming operations through the precise matching of the upper and lower dies.

The die generally consists of two main sections: the upper die and the lower die. They are mounted on the press ram and bed, and alignment is maintained by guide posts to ensure accurate positioning.

2. Main Components of a Standard Die

1. Upper Die Set
   Function: Serves as the supporting structure of the entire upper die assembly. It is fixed to the press ram and transmits the pressing force to the lower die system.

2. Backing Plate / Spacer Plate
   Function: Acts as a buffer and thickness compensation layer between the punch plate and the upper die set. It is typically made of harder material to support the back of the punch and prevent bending or damage under load.

3. Punch Plate / Punch Holder
   Function: The main structure for securing punches and guide posts, firmly mounting these components inside the die.

4. Stripper Plate
   Function 1: Prevents the work material from sticking to the punch after penetration.
   Function 2: Keeps the material flat and prevents deformation caused by pulling or distortion.
   It is commonly equipped with springs and guide support to ensure close contact with the lower die.

5. Die / Die Insert
   Function: Works together with the punch to perform accurate cutting and provides the forming cavity that shapes the finished product.

6. Lower Backing Plate
   Function: When punches are installed in the lower die according to design requirements, this plate acts as a buffer and thickness compensation layer between the die insert and the lower die set. It is usually made of hardened material to support the punch and prevent bending or damage.

7. Lower Die Set / Lower Plate
   Function: Supports the entire lower die system and receives the impact force transmitted from the upper die.