Sheet metal forming is the process of obtaining products or pieces of sheet …
Sheet metal forming is the process of obtaining products or pieces of sheet material by deforming it with the help of the presses with dies.
With sheet metal forming it is possible to get products not only from metal, but also from leather, cardboard, plastics.
Cold sheet stamping is one of the most progressive and cost-effective manufacturing of the parts.
Parts of sheet stampings have inaccurate dimensions, interchangeability, and, in most cases, does not require further machining, have high strength and stiffness with low weight and low material consumption.
Forging of sheet material to produce a variety of items – housing, flanges, caps, wall, chassis, frames, boards, gear and other flat and curved parts.
Cold pressing comprises a large number of operations that are divided into two large groups by the nature of deformation of the metal:
1. Operations with division (sharp) of the material;
2. Operations with plastic deformation of the material.
More specifically, all operations of cold stamping are divided into the following main types according to the type of deformation:
- Cutting – is separation of one part of the material or workpiece from another in a closed or open loop;
- Bending – is the transformation of a flat blank into the curved part;
- Extract – is the transformation of a flat blank into a hollow part of any form;
- Forming – is the change of the shape of the part or workpiece by local deformations of various kinds.
In turn, almost every one of the main types of operations is divided into a number of specific operations, characterized by a singularity and the appointment of produced work, as well as by the type of stamp.
Considering the main types of cold stamping operations, it should be borne in mind that during manufacturing of parts, they can be produced jointly by combining (with one stamp) of several types of deformities or consistently by different stamps.
Hot forging – is a way of metal forming, in which the product is given the required shape using a special tool – the stamp.
The part formed by die forging, called forgings.
While die forging, metal is deformed simultaneously throughout the volume, and its moving stream is realized in the cavity of the die shape and dimensions of which correspond to the future parts.
Compared with the forging, stamping has several advantages.
1. it has higher productivity;
2. it provides less consumption of material;
3. due to higher accuracy, it allows to significantly reduce the amount of subsequent machining.
Disadvantages:
1. For die forging much more effort for deformation is required;
2. Stamp is an expensive tool and it is only suitable for making one specific forging.
Therefore hot forging is economically appropriate to use in large series and mass production in the manufacture of forgings from a few grams to 20 kilograms.
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Posted on September 21, 2010
at 10:32 am
Written / posted by: admin
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