1991-11-01

The Single Stroke Cold Forming Technique in One Station 912603

:First Automobile Works (FAW) has successfully developed two kinds of cold forming techniques by a single, stroke in one station.One is called punch-and-close extrusion technique, by using this process we can produce cup parts with flangs. For example, wheel hub nuts of trucks are used to be extruded four times on a multi-station extruder, but now it can be done by a single stroke in one station. The investment on equipments for the new technique is only one-tenth of that multi-station extruder, and the quality of the products is improved a lot.The other is called spline forming technique by a single axial extrusion stroke.These cold forming techniques have the following advantages, the simple equipments required, high efficiency and good product quality. So they will be widely used in auto manufacturing industry.

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