By Ada Chen | 13 November 2020 | 0 Comments

Help you understand stamping die by flash

What is a stamping die
Stamping die is a special process equipment for processing materials (metal or non-metal) into parts (or semi-finished products) in cold stamping processing, called cold stamping die.
Stamping is a pressure processing method that uses a mold installed on a press to apply pressure to the material at room temperature to cause separation or plastic deformation to obtain the required parts.

Classification of stamping die process properties
1. Blanking die A die that separates materials along a closed or open outline. Such as blanking die, punching die, cutting die, slitting die, trimming die, cutting die, etc.
2. Bending mold It is a mold that makes the sheet blank or other blanks bend and deform along a straight line (bending line) to obtain a certain angle and shape of the workpiece.
3. The drawing die is a die for making the blank of a sheet into an open hollow part, or to make the hollow part further change its shape and size.
4. Forming mold is a mold that directly replicates the blank or semi-finished workpiece according to the shape of the convex and concave molds, and the material itself only generates local plastic deformation. Such as bulging die, necking die, flaring die, undulating forming die, flanging die, shaping die, etc.
5. The riveting mold is to use external force to connect or overlap the participating parts in a certain order and manner to form a whole

Classification of stamping die processing methods
According to different product processing methods, the molds can be divided into five categories: punching and shearing molds, bending molds, drawing molds, forming molds and compression molds.
1. Punching and shearing die: the work is done by shearing. Common forms include shearing die, blanking die, punching die, trimming die, edge die, punching die and punching die.
2. Bending mold: It is the shape of bending the flat blank into an angle. Depending on the shape, precision and production volume of the part, there are many different forms of molds, such as ordinary bending punches, cam bending punches, and curling Die, arc bending die, bending punching die and twisting die, etc.
3. Drawing mold: Drawing mold is to make flat blank into seamless container with bottom.
4. Forming die: refers to the use of various local deformation methods to change the shape of the blank. Its forms include convex forming die, curling edge forming die, necking forming die, hole flange forming die, and round edge forming die.
5. Compression die: It uses strong pressure to make the metal blank flow and deform into the required shape. The types include extrusion die, embossing die, embossing die, and end pressure die.

Basic knowledge of stamping die terminology
1. Crimping
 Hemming is a stamping process in which the edge of the process part is rolled into a closed circle. The axis of the curled circle is straight.
2. Curled edge
 Crimping is a stamping process in which the upper edge of the hollow part is rolled into a closed circle.
3. Drawing
 Drawing is a stamping process that transforms flat wool or process parts into a curved surface. The curved surface is mainly formed by the extension of the material at the bottom of the punch.
4. Pull bend
 Stretch bending is a stamping process in which bending deformation is realized under the combined action of tensile force and bending moment, so that the entire bending cross section is subjected to tensile stress.
5. Bulging
 Bulging is a punching process in which hollow or tubular parts are expanded radially outward. Sectioning Sectioning is a stamping process that divides the forming process into several pieces.
6. Leveling
 Leveling is a stamping process to improve the flatness of partial or overall planar parts.
7, ups and downs
 It is a stamping process that relies on the extension of the material to form partial depressions or protrusions in the process parts. The change in the thickness of the material in the undulating forming is unintentional, that is, a small change in the thickness is naturally formed during the deformation process, and is not a requirement specified by the design.
8, bending
 Bending is a stamping process that uses pressure to plastically deform a material, thereby being bent into a shape with a certain curvature and a certain angle.
9. Chiseling
 Chiseling is a process of blanking or punching using a sharp-edged chiseling die. There is no lower die for chiseling, only a flat plate is under the material, and most of the material being punched is non-metal.
10. Deep hole punching
 Deep hole punching is a punching process when the hole diameter is equal to or smaller than the thickness of the material being punched.
11. Blanking
 Blanking is a stamping process that separates materials along a closed contour. The separated materials become workpieces or process parts, most of which are flat.
12. Neck
 Neck is a stamping process that pressurizes the opening of a hollow or tubular member to shrink it.
13, plastic surgery
 Shaping is a stamping process that depends on the flow of materials and changes the shape and size of the process parts in a small amount to ensure the accuracy of the workpiece.
14. Renovation
 Refurbishment is a stamping process that cuts a small amount of material along the outer or inner contour to improve the edge finish and perpendicularity. The refurbishment process generally also improves the dimensional accuracy at the same time.
15. Flip holes
 Hole turning is a punching process that turns the material into side flanges around the inner hole.
16. Flanging
 Flanging is a stamping process in which materials are turned into short sides along the contour curve.
17, deep drawing
Deep drawing is a stamping process in which straight wool or process parts are turned into hollow parts, or the hollow parts are further changed in shape and size. During deep drawing, the hollow part is mainly formed by flowing the material outside the bottom of the punch into the concave mold.
18. Continuous deep drawing
Continuous drawing is a stamping method that uses the same mold (continuous drawing die) to gradually form the desired shape and size through multiple drawing on the strip (coil).
19. Thinning and deep drawing
Thinning and deep drawing is a kind of drawing process in which the hollow process part is further changed in shape and size, and the side wall is intentionally thinned.
20, reverse deep drawing
Reverse drawing is a drawing process in which the inner wall of the hollow process part is turned outward.
21. Differential temperature drawing
Differential temperature drawing is a drawing process that uses heating and cooling means to make the temperature of the material to be deformed far higher than the temperature of the material that has been deformed, thereby increasing the degree of deformation.
22. Hydraulic deep drawing
Hydraulic drawing is a drawing process that uses liquid contained in a rigid or flexible container to replace a punch or die to form a hollow part.
23. Beading
Beading is a kind of undulation. When local undulations appear in the form of ribs, the corresponding undulation forming process is called beading.

Below the flash to understand more about stamping die and stamping process:

Overall stamping process

Round punching
rounding punching process

Group hole punching
group hole punching process

Bending deformation
bending deformation process


calendering process

Simple stretch forming

Round workpiece bending

Pendulum type workpiece bending
bending process

Fold-shaped workpiece bending
bending process on staming tooling

Continuous bending die / Progressive bending die
progressive stamping tooling

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