What are the forming methods of metal stamping parts?

The application of drawn metal stamping parts is more and more extensive, not only in industry, but also in life, because its drawing process can be made into various shapes, such as cylindrical, rectangular, stepped, spherical and other irregular shapes. So do you all know what are the forming methods of metal stamping parts?

Metal parts are the most widely used parts in daily life, and their main processing materials are metals. Drawing is a stamping process in which a slab or hollow part of a certain shape is made into a hollow part with various openings through a drawing die.

Precautions for the processing of pressed and drawn parts:

1. The shape of the metal stamping die should be as simple and symmetrical as possible, and it should be drawn and formed at one time;

2. For parts that need to be stretched many times, under the premise of ensuring the necessary appearance quality, there should be possible stretch marks on the appearance;

3. In order to ensure the installation requirements, the side wall of the extension piece should have a certain angle of inclination;

4. The distance from the bottom surface of the telescopic piece or the hole edge of the flange to the side wall should be appropriate;

5. The bottom-wall surface of the drawing piece, the flange and the wall surface, and the corner radius of the four corners of the rectangular piece should be appropriate;

6. The scale, inner and outer shape of metal punching and drawing parts cannot be marked uniformly.

Stamping equipment used in the stretch forming process of the product includes:

Tension treatment: A plate pressing device is used, and part or all of the plate is pulled into the cavity of the cavity by the punch of the punch to make it a bottomed container. For the drawing process of conical (or pyramidal) containers, hemispherical containers and parabolic containers, the side walls are parallel to the drawing direction, and the expansion process is also included.

Drawing back processing: That is to say, for deep drawn products that cannot be completed by one drawing processing, the shaped products after drawing processing need to be drawn again to increase the depth of the forming container.

Reverse drawing processing: Reverse drawing of the tension punch in the previous process, so that the inner wall of the workpiece becomes the outer side and the outer diameter is reduced.

Thin-type drawing processing: use a punch to extrude the forming container into a cavity that is slightly smaller than the outer diameter of the container, so that the outer diameter of the container with the bottom becomes smaller, the wall thickness becomes thinner, the offset is eliminated, and the surface of the container is smooth.