Since cold forging manufacturing processes is widely used in the mechanical
manufacturing process which including hammer forging services, forging machine
parts. I continue to tell you the advantages about it.
4. Improve the mechanical properties of parts
In the cold extrusion process, the metal material in the next three to
varying compressive stress. After extrusion, the grain structure of the metal
material is more dense metal flow lines will not be cut off and become a
continuous distribution along the contour of the extruded metal flow lines.
Meanwhile, the use of cold extrusion of metal material properties of cold
deformation hardening, the strength of the cold extrusion of greatly improved,
thereby providing the possibility of using low-strength steel instead of high
5. A high dimensional accuracy can be obtained and a small part of surface
By cold extrusion parts surface quality is very good. In the cold extrusion
process, the metal surface by a smooth surface screed mold under high pressure,
the surface roughness of small parts, surface strength has been greatly
improved. Usually cold extrusion parts surface roughness Ra of at least 0.63 ~
1.25μm or more. Visible, cold extrusion processing components, some parts may
remain small allowance, leave allowance can not even meet the technical
requirements on product design.
6. Reduce the process, shortening the production cycle
Cold extrusion process is carried out in a closed plastic deformation of the
metal mold cavity, resulting extrusion is no burr, it is no longer needed
trimming (or punching) subsequent step, thereby shortening the production
7. Reduce equipment investment
Compared with the forging process, due to the cold extrusion no flash, it can
save a trimming die and trimming presses, significantly reducing the investment
in equipment. In addition, cold extrusion processing, on a dedicated cold
extrusion presses may be performed on a universal hydraulic machine can also be
designed specifically for the cold extrusion press in the non-conventional
progressive, such as general press or friction press .
8. Reduce production costs of parts
Since the cold extrusion can greatly reduce raw materials and metal cutting
working hours, it will inevitably reduce the manufacturing cost of the parts.
For example, the production of automotive piston pin in three ways: cold
extrusion, bar cutting and machining seamless steel pipe. Cold extrusion piston
pin lowest cost relative to bar cutting costs by 45%, compared with the seamless
steel pipe as a raw material and processing costs by 29%.