bulging die

What is a forming die

What is a forming die

The mold that directly copies and forms the blank or semi-finished workpiece according to the shape of the convex and concave mold, and the material itself only produces local plastic deformation is called the forming die (as shown in Figure 1-5, it is the bulging die in the middle of the cylindrical part). The forming process can be divided into Burring, flanging, bulging, necking, expanding, undulating forming and sizing, as shown in table 1-4.It’s basic process for metal stamping and deep drawing.

Figure 1-5 bulging die

bulging die

1-punch in the middle of cylindrical part; 2,3 – female die: 4 – unloader: 5 – Ejector

Table 1-4 Forming process

Process Sketch Characteristics and application
Burring Burring Punch the pre punched semi-finished sheet metal or the non punched sheet metal into a vertical edge
Flanging Flanging Shape the edges of semi-finished sheet metal into vertical edges according to curves or arcs
Bulging Bulging Deformation is realized under the action of bidirectional tensile stress to form parts with various spatial surface shapes
Necking Necking On a certain part of a hollow blank or tubular blank, its radial size is reduced
Flaring Flaring On a certain part of a hollow blank or tubular blank, its radial size is expanded
Concave-Convex concave-convex Bulges or depressions of various shapes are made on the surface of blank or workpiece by local forming
Shape correction Shape correction Correct the manufacturing shape to improve the dimensional accuracy of the formed products or obtain a smaller fillet radius.