Stamping forming
Stamping elbow is the earliest forming process applied to batch production of seamless elbow. It has been replaced by hot pushing method or other forming processes in the production of elbow with common specifications. However, in some elbow specifications, the production quantity is small, the wall thickness is too thick or too thin.
The product is still used in case of special requirements. The pipe blank with the same outer diameter as the elbow shall be used for the stamping forming of the elbow, and the press shall be used for direct pressing in the die.
Before stamping, the tube blank is placed on the lower die, the inner core and end die are installed into the tube blank, the upper die moves downward and starts to press, and the elbow is formed by the constraint of the outer die and the support of the inner die.
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