Stamping elbow forming is the forming process, first used in mass production of elbow at present, in the common specifications of seamless elbow production has been hot forming process or other alternatives, but in some specifications of the elbow due to the production quantity and the wall thickness is too thick or products with special requirements are still in use. Stamping elbow tube and the elbow is equal to the outer diameter of the mold forming press use directly.
Before stamping tube placed in the mold, the mold is arranged in the inner core and end tube, upper die downward movement began to suppress, supported by constraints and internal model of the external die stamping elbow forming.
Compared with the hot stamping process, the appearance quality is inferior to the former; stamping elbow when formed outside the arc in tension, no other metal parts of excess compensation, so the outer arc wall thickness thinning of about 10%. But because suitable for single piece production and low cost, so the process of stamping elbow used for the manufacture of small batch, thick wall elbow.
Stamping elbow cold stamping and hot stamping two, usually according to the selection of cold stamping or hot stamping material properties and equipment capacity.
The cold extrusion forming process is the use of special elbow bend forming machine, tube into the outer mold, lower mold clamping, driven by the push rods, tubes reserved along the inner mold and the external mold of the clearance and finish forming process.
The cold extruding die for elbow shape, wall thickness, the manufacturing process of small size deviation, the stainless steel elbow especially thin-walled stainless steel elbow forming by the manufacturing process. By using this model and precision stamping elbow process requirements; on the tube wall thickness deviation requirements are more demanding.
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