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Extrusion, extrusion and extrusion are the three most widely used methods in cold extrusion technology.
The precision cold extrusion part is to put the metal blank in the cold extrusion die cavity, at room temperature, through the press on the convex mold to put pressure on the blank, so that the metal blanks produce plastic deformation and the processing method of parts.
1 positive extrusion: the flow direction of the metal is consistent with the direction of the movement of the punch. Positive extrusion can produce various shapes of solid pieces and hollow parts.
2 anti extrusion: when the anti extrusion, the flow direction of the metal is opposite to the direction of movement of the punch. Anti extrusion can obtain a variety of shapes of cup shaped parts.
3 composite extrusion: when a part of the metal flow direction is same as the direction of the movement of the punch, and the other part of the metal flow direction is opposite to the direction of the punch movement. Composite extrusion can be made all kinds of cup, rod, tube parts.
4 radial extrusion; extrusion, the flow direction of the metal is perpendicular to the direction of the movement of the punch. Radial extrusion can be divided into the radial extrusion and centrifugal extrusion, radial extrusion used to manufacture helical gears, flower and other parts of the keyboard.
5: upsetting forging, metal blank radial outward flow. The upsetting for cup shaped parts manufacturing flanged shaft or flange.
Extrusion, extrusion and extrusion are the three most widely used methods in cold extrusion technology. Their metal flow direction is parallel to the axis of the convex mold. Therefore, there are a lot of information on these three methods for axial extrusion pressure. As mentioned before, the axial compression can make various kinds of solid and hollow parts, such as ball pin, bobbin shell, shell etc.. The radial extrusion is developed in recent ten years, mainly for the number plate of the communication equipment, the bicycle and the keyboard.
Above is a few basic cold extrusion deformation, with the development of cold extrusion technology, and sometimes the cold volume die forging, etc. belong to cold extrusion.
Precision cold extrusion parts in the automotive, high-speed rail, aircraft, tractors, bearings, telecommunications equipment, instrumentation and other mechanical and electrical manufacturing, or in the bicycle, sewing machine and other light industry, as well as the defense industry system has a wide range of applications, which is because it has obvious advantages.