Custom Metal Drawing Fabrication Services

When using stamping equipment to process metal stamping Drawings, it includes the following 16 types:

01 Round drawing

Drawings Forming of cylindrical products with flanges (flanges). The flange and the bottom are both flat, the side wall of the cylinder is axisymmetric, and the deformation is evenly distributed on the same circumference, and the blank on the flange produces deep drawing deformation.

02 Ellipse drawing

The deformation of the blank on the flange is the Drawings Forming deformation, but the amount of deformation and the deformation ratio change accordingly along the contour shape. The larger the curvature, the greater the plastic deformation of the blank; conversely, the smaller the curvature, the smaller the plastic deformation of the blank.

03 Rectangular drawing

A low rectangular piece formed by Drawings Forming at one time. When Drawings Forming, the drawings forming resistance at the rounded corners of the flange deformation zone is greater than the drawings forming resistance at the straight edges, and the deformation at the rounded corners is greater than that at the straight edges.

04 1-Hill drawing

When the side wall of the stamping part is inclined, the side wall is suspended during the stamping process and is not attached to the mold. The mold is not attached until the end of forming. The deformation characteristics of different parts of the side wall are not completely the same during forming.

05 2-Hill drawing

The deformation of the blank of the dome-shaped cover plate during the forming process is not a simple Drawings Forming deformation, but a composite forming in which Drawings Forming and bulging deformation exist at the same time. The deformation of the blank on the blanking surface is Drawings Forming deformation (tensile stress in the radial direction and compressive stress in the tangential direction), while the deformation of the blank inside the contour (especially the central area) is bulging deformation (both radial and tangential) Is tensile stress).

06 With flange hemisphere drawing

When the spherical part is Drawings Forming, the blank is in partial contact with the spherical top of the punch, and most of the rest are in a suspended and unconstrained free state. Therefore, the main process problem of Drawings Forming of this kind of spherical parts is the serious thinning of the local contact part, or the instability and wrinkling of the curved part.

07 Flange drawing

Perform shallow Drawings Forming processing on the flange part of Drawings Forming products. The stress and strain situation is similar to compression flanging. Due to the tangential compressive stress, it is easy to wrinkle, so the forming limit is mainly limited by the compression wrinkle.

08 Flange drawing

The flange part of the previous Drawings Forming product is processed into an angle shape and then Drawings Forming. This kind of processing requires the material to have good plasticity.

09 Deep drawing

Drawings Forming processing products that exceed the processing limit of Drawings Forming can be completed after more than two Drawings Forming processes. The products processed by Drawings Forming in the depth direction of the front station are processed again in the Drawings Forming direction in the depth direction. For Drawings Forming parts with wide flanges, the required flange diameter will be changed to the required flange diameter during the first Drawings Forming, and the flange diameter will remain unchanged during subsequent Drawings Forming.

10 Taper drawing

For deep taper parts with h/d>0.8 and α=10°～30°, due to the large depth, the deformation of the blank is greater. Only the local area of ​​the blank contacting the punch transfers the forming force, which can easily cause local blanks. Excessive thinning or even rupture requires multiple transitions to gradually take shape. Ladder Drawings Forming method is to first form the blank Drawings Forming into a stepped transition piece, the stepped shape is tangent to the inner shape of the tapered part, and finally a cone is formed. The number of Drawings Forming times and processes of the stepped transition piece are the same as the Drawings Forming of the stepped cylindrical piece.

11 Rectangular redrawing

The deformation of the tall rectangular part formed by multiple Drawings Forming is not only different from the Drawings Forming of the deep cylindrical part, but also very different from the deformation of the low box-shaped part. The picture shows that when a multi-station automatic conveying press is used to process high rectangular box parts, the shape and size of the part will change with the height of the Drawings Forming during multiple Drawings Forming processes.

12 Surface forming

Curved Surface Drawings Forming makes the outer flange part of the metal flat blank shrink and the inner flange part elongates, which becomes a stamping forming method for hollow products with non-straight walls and non-flat bottom curved surfaces.

13 Step drawing

Re-Drawings Forming is performed on the initial Drawings Forming product on the left to form a stepped bottom on the right. The deeper part is deformed in the early stage of Drawings Forming, and the shallower part is deformed in the later stage of Drawings Forming. The side wall of the step change part is easy to induce shear stress and deform.

14 Reverse drawing

Reverse Drawings Forming is performed on the workpiece processed by Drawings Forming in the previous process, which is a kind of Drawings Forming. The reverse Drawings Forming method can increase the radial tensile stress, and can achieve better results in preventing wrinkles. It is also possible to increase the Drawings Forming coefficient of Drawings Forming.

15 Ironing

Different from ordinary Drawings Forming, thinning of Drawings Forming is mainly to change the thickness of the cylinder wall of Drawings Forming during the process of Drawings Forming. The gap between the convex and concave dies is smaller than the thickness of the blank. When the straight wall part of the blank passes through the gap, it is under a large uniform compressive stress. While the wall thickness becomes thinner during the Drawings Forming process, the wall thickness deviation of the container is eliminated and the surface of the container is increased. Smoothness improves accuracy and strength.

16 Panel drawing

Panel products are sheet metal stamping parts with complex surface shapes. In the Drawings Forming process, the deformation of the blank is complicated, and its forming properties are no longer simple Drawings Forming forming, but a composite forming with simultaneous deep drawing and bulging.