Classification of Stamping Dies

How many types of metal stamping molds are classified by process
The metal stamping molds are mainly divided into the following types according to the process:

1. Single process mold - refers to the mold completed in one stamping process of a press;

2. Composite mold - always at the same workstation in press manufacturing;

3. Continuous die - In the stroke of a press, two or more workstations sequentially complete two or more stamping processes in a mold. In one stamping stroke, the press uses strip stamping raw materials and completes multiple stamping processes on a cold stamping die using several different workstations on a mold. The die completes each stamping process, and the strip moves at a fixed distance once until the product is completed.

4. Multi station die - a rated die for stamping workpieces on a stamping production chain using a mechanical arm or other automated facilities with different stamping processes, using molds or parts to move and complete the stamping process.

What are the types of stamping dies?
The classification of stamping molds can generally be simply divided into two types: engineering molds and continuous molds;

Engineering molds can be divided into composite molds, stretching molds, riveting molds, etc. Below is a brief introduction to the structure and function of these molds;

Engineering Model: Also known as a "single process mold", it refers to a mold that can only complete one stamping process in one stroke of stamping. After this project is completed, the product needs to be manually or mechanically removed from the mold, and then placed in the next station's mold to continue production until the next process of the mold is completed, and the entire product is considered complete. This type of mold is easy to maintain, but production is time-consuming and labor-intensive, requiring a significant amount of labor and time costs, resulting in a high product scrap rate.

Composite mold: Common composite mold structures include composite cutting, composite stretching, etc., which are slightly different from other engineering mold structures. The convex mold (also known as the male mold or punch) is designed on the lower mold, and the other templates are sequentially the lower clamp plate (fixed convex mold punch), the lower stop plate, and the lower stripper plate (outer stripper). The upper mold is composed of the female mold (or blade), the inner stripper plate, and the upper cushion plate. The inner stripper is hung on the upper cushion plate using an equal height sleeve, and then supported by a driving rod or spring. For example, in composite molds used for cutting, the internal detachment of the mold is generally 0.50mm from the mother mold, and cannot be lower than the mother mold, otherwise the blade of the mother mold is prone to breakage or failure to detach. The force of internal detachment needs to be strong enough to push the product out of the mother mold. Generally, if the material is relatively thick, we install nitrogen springs on top.

Continuous die, also known as "progressive die," refers to a mold that completes two or more stamping processes simultaneously at different workstations during a single stamping process. This type of mold is difficult to maintain and requires experienced fitters to operate. However, it has high production efficiency and can produce thousands of products in an hour at a fast speed, saving labor and time costs. The product scrap rate is low

How many types of stamping molds are there? Humbly seek advice!
Stamping molds are divided into single die (simple die), composite die, and continuous die according to the mold structure. There are only these three types, but there are more subdivisions, mainly based on the needs of the process, so it is not so easy to strictly distinguish. These classifications upstairs are actually included in these three categories.

Single punch die: Generally, it consists of one convex die and one concave die, and can also have multiple convex dies and multiple concave dies, but only one punching process can be completed in a single punch line.

Continuous die refers to a cold stamping die in which a press machine uses strip stamping raw materials in a single stamping stroke, and uses several different workstations on a set of molds to simultaneously complete multiple stamping processes. The mold completes each stamping process, and the strip moves at a fixed distance once until the product is completed.

The material strip of the continuous die always moves in one direction during the stamping process; A progressive mold is a type of mold where the material strip inside the mold is cut and moves in two or more directions; The automatic continuous mold is used to complete the feeding of materials inside the mold; On a stamping production chain, using different stamping molds with different processes, using a robotic arm or other automated facilities, and using molds or parts to move to complete workpiece stamping processing, the rated mold is called a multi station mold.

Composite mold: A mold that completes multiple processes in one stamping process at a workstation.

I hope it will be helpful to you.

What are the types of molds for sheet metal stamping? What are their characteristics?
Sheet metal stamping molds are divided into single punch molds and skip step molds, composite molds, bending molds, stretching molds, etc. A single punching mold can only press one process at a time, such as punching holes or cutting materials; Jump step molds, also known as progressive molds, can process multiple processes simultaneously through multiple stamping processes on a set of molds, such as punching, cutting, and bending; Composite molds can simultaneously complete processes such as punching, cutting, and stretching in one go; Bending mold, as the name suggests, is to bend a flat sheet metal into the desired shape; A stretching die is a component that stamping a sheet metal into a cylindrical or box shape. For example: rice bowl, tea cup, basin, etc.

What are the classification methods for stamping molds?
There are many forms of stamping molds, which can generally be classified according to the following main characteristics:

1. Classification based on process properties

(1) A die that separates materials along a closed or open contour line. Such as material cutting die, punching die, cutting die, cutting die, edge cutting die, cutting die, etc.

(2) A bending die is a mold that causes the blank or other blank to bend and deform along a straight line (bending curve), thereby obtaining a workpiece with a certain angle and shape.

(3) A deep drawing die is a mold that turns a blank sheet into an open hollow part, or further changes the shape and size of the hollow part.

(4) A forming die is a mold that directly replicates a rough or semi-finished workpiece into a convex or concave shape according to the drawing, while the material itself only produces local plastic deformation. Such as bulging molds, necking molds, expanding molds, undulating forming molds, flanging molds, shaping molds, etc.

2. Classification based on the degree of process combination

(1) A single process mold is a mold that completes only one stamping process in one stroke of a press.

(2) A composite mold has only one workstation, and in one stroke of the press, it is a mold that completes two or more stamping processes simultaneously on the same workstation.

(3) Progressive die (also known as continuous die) has two or more workstations in the direction of raw material feeding. It is a mold that completes two or more stamping processes on different workstations in one stroke of the press.

3. Classification based on the deformation characteristics of materials

What are the types of stamping molds
There are many types of stamping molds, commonly used including punching molds, bending molds, forming molds, stretching molds, etc. In terms of stamping process methods, they can be summarized into two categories: separation process and forming process. The molds for the separation process include: material cutting, punching, cutting, edge cutting, sectioning, etc; The molds used in the forming process include bending, rounding, twisting, deep drawing, thinning and stretching, flipping, flanging, bending, bulging, undulating, expanding, necking, spinning, and shaping.