Cold stamping processing has been widely used in mass production, and it plays an important role in modern industrial production. It is an indispensable processing method in the defense industry and civil industrial production. basic introduction
In the trial production of new products and the production of stamped parts in small batches, a simple die structure has been widely adopted. The die is not only simple in structure, but also has convenient manufacturing, low cost, and can meet certain processing quality requirements.
Recently, the simple die mainly includes rubber die, polyurethane rubber die, steel die, thin die, low melting alloy die, zinc alloy die and combined die.
In the cold stamping production, research and development of these simple dies has great practical value. This is because the simple die has a faster production time and lower manufacturing cost than the conventional die, which provides a more economical and effective way for the trial production of some new products and the production of some stamping parts with less batch requirements. Therefore, strengthening the research and development of simple dies will strongly promote the upgrading and production of industrial products, and has important practical significance for further improving economic efficiency and improving the existing industrial production technology.
The production process of the die in the production process is from the raw materials through casting, forging, cutting and special processing, processing into the die parts required by the design drawings, and then assembling the die parts into the whole process of the die according to the technical requirements of the design and the process specification.
A qualified mold should meet the following basic requirements:
1. The mold parts can meet the design requirements of the materials in terms of material properties, forming die processing and heat treatment quality;
2. Assembly quality and performance after meeting the design requirements after the mold is assembled;
3. The quality of the test parts is qualified and meets the requirements;
4. The die has a high service life and durability;
5. The production cycle of die manufacturing is short, the cost is low, and there are good economic and technical benefits.
Processing characteristics
Cold stamping processing has been widely used in mass production, and it plays an important role in modern industrial production. It is an indispensable processing method in the defense industry and civil industrial production.
1. High stamping productivity and high material utilization rate;
2. The manufactured parts have high precision, high complexity and high consistency;
Stamping and forming must have the corresponding mold, and the mold is a technology-intensive product. Its manufacture is single-piece and small-volume production. It has difficult processing, high precision, high technical requirements and high production cost (about 10% to 30% of product cost). %)specialty. Therefore, only in the case of large batch production of stamping parts, the advantages of stamping forming processing can be fully reflected, thereby obtaining good economic benefits.
Die form
1. Classified according to process properties
(1) The blanking die creates a separate mold along the closed or open contour. Such as blanking die, punching die, cutting die, slit die, trimming die, cutting die and so on.
(2) The bending die causes the sheet blank or other blank to be bent and deformed along a straight line (curved line), thereby obtaining a mold of a workpiece of a certain angle and shape. Cold die
(3) The drawing die is a die in which the blank of the sheet is made into an open hollow member, or the hollow member is further changed in shape and size.
(4) The forming die is a mold in which a blank or a semi-finished workpiece is directly copied and formed in the shape of a convex or concave die, and the material itself produces only a partial plastic deformation. Such as bulging die, shrinking die, flaring die, undulating forming die, flanging die, shaping die and the like.
2. Classified according to the degree of process combination
(1) Single-step mold In the one stroke of the press, only one mold of the stamping process is completed.
(2) The composite mold has only one working position, and in the one stroke of the press, two or more stamping processes are simultaneously completed at the same working position.
(3) Progressive die (also called continuous die) There are two or more stations in the feeding direction of the blank, and two or two successively in different positions in the one stroke of the press The mold of the stamping process above the road.
3. Classification according to the deformation characteristics of the material
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