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English for Die & Mould Design and Manufacturing

Categories: Ahead NewsStars: 3Stars Visit: - Release time: 2015-11-17 11:07:00
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English for Die & Mould Design and Manufacturing --- Aheadmold

Chapter 1    Stamping Forming and Die Design

Introduction

Metal processing is a branch of engineering science, which deals with the manufacturing of metallic parts and structures through the processes of plastic forming, machining, welding and casting. This part focuses on the stamping forming technology and its die design in metal processing. Stamping is mainly used in sheet plate forming, which can be used not only in metal forming, but also in non-metal forming. In stamping forming, under the action of dies, the inner force deforming the plate occurs in the plate. When the inner force reaches a certain degree, the corresponding plastic deformation occurs in the blank or in some region of the blank. Therefore the part with certain shape, size and characteristic is produced.
Stamping is carried out by dies and press, and has a high productivity. Mechanization and automatization for stamping can be realized conveniently owing to its easy operation. Because the stamping part is produced by dies, it can be used to produce the complex part that may be manufactured with difficulty by other processes. The stamping part can be used generally without further machining. Usually, stamping process can be done without heating. Therefore, not only does it save material but also energy. Moreover, the stamping part has the characteristics of light weight and high rigidity.
Stamping processes vary with the shape, the size and the accuracy demands, the output of the part and the material. It can be classified into two categories: cutting process and forming process. The objective of cutting process is to separate the part from blank along a given contour line in stamping. The surface quality of the cross-section of the separated part must meet a certain demand. In forming processes, such as bending, deep drawing, local forming, bulging, flanging, necking, sizing and spinning, plastic deformation occurs  in the  blank without fracture  and wrinkle, and the part with the required shape and dimensional accuracy is produced.
The stamping processes widely used are listed in Table 1-1.

Table 1-1  Classification of the Stamping Processes and Their Characteristics
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