Wed Mar 08 22:43:52 CST 2023
They can generally be classified according to the following main characteristics.
1. Classification according to the nature of the process
a. Punching die: a die that separates materials along a closed or open contour line. Such as drop die, punching die, cutting die, notching die, cutting edge die, cutting die, etc.
b. Bending die: make the plate blank or other blanks along the straight line (bending line) to produce bending deformation, so as to obtain a certain angle and shape of the workpiece of the mold.
c. Deep drawing die: is the sheet blank into open hollow parts, or hollow parts to further change the shape and size of the mold.
d. Forming die: is the blank or semi-finished workpiece according to the shape of the convex and concave mold directly copy forming, and the material itself only produce local plastic deformation of the mold. Such as expansion moulds, indentation moulds, flaring moulds, undulation moulds, flanging moulds, shaping moulds, etc..
2. according to the process combination degree classification
a. Single process die: In one stroke of the press, only one stamping process is completed in the die.
b. Compound die: a die with only one work station, in which two or more stamping processes are completed at the same work station in one stroke of the press.
c. Progressive die (also called continuous die): a die with two or more stations in the direction of feeding the blank, in which two or more stamping processes are completed at different stations in one stroke of the press, one after the other.
3. Classification according to the processing method of the product
According to the different processing methods of the products, the moulds can be divided into five categories: punching and shearing moulds, bending moulds, drawing moulds, forming moulds and compression moulds.
a. Punching and shearing moulds: is to shear the role to complete the work, commonly used forms of shear punching die, under the material punching die, punching die, trimming die, the whole edge of the punching die, pulling hole punching die and punching die.
b. Bending die: is the flat embryo bending into an angle shape, depending on the shape of the parts, precision and production volume, there are a variety of different forms of die, such as ordinary bending die, cam bending die, rolled edge die, arc bending die, bending punching die and twist punching die.
c. Extraction moulds: Extraction moulds are used to make flat blanks into seamless containers with a bottom.
d. Forming dies: These are used to change the shape of the blank by various methods of local deformation, and take the form of a convex forming die, a rolled edge forming die, a necking forming die, a hole flange forming die and a round edge forming die.
e. Compression dies: These are used to deform the metal blank into the desired shape by using strong pressure.