Brief Introduction

Stamping die-in cold stamping, the material (metal or non-metallic) processing parts ( or semi-finished products) of a special process equipment, known as cold stamping die ( commonly known as cold die). Stamping is a method of pressing a material at room temperature by applying pressure on the material on the mold of the press to produce a separation or plastic deformation so as to obtain the required parts.

Stamping die is a necessary process equipment for stamping production, and it is a technology intensive product. The quality of stamping parts, production efficiency and production cost are directly related to die design and manufacture. The level of mold design and manufacturing technology is one of the important signs to measure the manufacturing level of a country’s products, and to a great extent, it determines the quality, efficiency and development ability of new products.

Two classification

Stamping mold in many forms, the die is also based on the nature of the work, mold construction, mold materials three categories.

Generally, the following main features can be classified:

1. Classification according to process properties
A. Blanking die is made of a closed or open contour to separate the material from the mold. Such as blanking die, punching die, cutting die, trimming die, etc..
B. A die for bending or deforming a sheet blank or other billet along a straight line (bending curve) so as to obtain a workpiece with a definite angle and shape.
C. Drawing die is a mold made of sheet blank into open hollow parts or hollow parts to further change shape and size.
D. Forming die is to make the blank or semi-finished workpiece be copied and formed directly according to the shape of the convex and concave die, and the material itself produces only the partial plastic deformation of the mold. Such as bulging die, necking die, expanding die, fluctuation forming die, flanging die, shaping die, etc..

2. Classify according to the degree of process combination
A. Single process die, in a stroke of the press, only complete a stamping process of the mold.
B. Compound die has only one working position. During the stroke of the press, the die of two or more than two stamping processes is completed on the same station simultaneously.
C. Progressive die ( continuous mode) in the feeding direction rough, with two or more of the station in a press tour, successively completed two or more than two die stamping process in different stations.

3. Classification according to the processing methods of the products.
According to the different processing methods, can be divided into mould die, bending die, drawing die, mold and compression mold five categories.
A. Die is to finish the work to shear, commonly used form of cutting die, blanking die, punching and trimming die, broaching die and punching die.
B. Bending die: is the smooth hair Peiwan and angle shape, depending on the shape, accuracy and the amount of production, but there are many different forms of mold, such as bending die, flanging die cam, arc bending die, bending die punching seams and distortion die etc..
C. Drawing: drawing die mold is the plane blank made of a seamless container.
D. Forming die: refers to the method of changing the shape of the embryo with various local deformation methods. The forms include punch forming die, flanging forming die, necking forming die, hole flanging forming die and round edge forming die.
E. Compression mold: the use of a strong pressure to make the metal wool flow deformation, and become the required shape, and its types are extrusion die, embossing die, stamping die, end pressure die.

Mold Typical Structure

A stamping die is usually made up of two parts:
The first type is the process parts, which are directly involved in the process and have direct contact with the blank, including working parts, positioning parts, unloading and pressing parts, etc..

The second type is the structural parts, which are not directly involved in the completion of the process, and do not have direct contact with the blank.

Only to ensure the completion of the mold process, or to improve the function of the mold, including guiding parts, fastening parts, standard parts and other parts. It should be pointed our that not all dies must have the above six parts, especially the single process die, but the working parts and the necessary fixed parts are indispensable.