A process for forging a metal blank by a forging die on a die forging hammer or a press. The die forging process has high production efficiency, low labor intensity, accurate size, small machining allowance, and forging forgings with complex shapes; suitable for mass production. However, the cost of the mold is high, and special die forging equipment is required, which is not suitable for single or small batch production. Die forging is defined as a forging method in which a blank is molded by a mold on a special die forging device to obtain a forged piece.
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According to different equipment, die forging is divided into hammer forging, crank press forging, flat forging die forging, friction press forging and so on.
[Precision die forging]
Developed on the basis of die forging, it is possible to forge parts with complex shapes and high dimensional accuracy, such as bevel gears, blades, and aerospace parts.
Brief introduction of the process of forging and forming a metal blank by a forging die on a die forging hammer or a press. The die forging process has high production efficiency, low labor intensity, accurate size, small machining allowance, and forging forgings with complex shapes; suitable for mass production. However, the cost of the mold is high, and special die forging equipment is required, which is not suitable for single or small batch production.
The forging die for die forging is composed of two upper and lower modules, and the die 4 is the working part of the forging die, and each of the upper and lower dies is half. The dovetail and wedges 1, 2 are fixed on the anvil and the workbench; and guided by the lock 3 or the guide post to prevent the upper and lower modules from being misaligned. The metal blank is deformed in the shape of the mold.
The steps of die forging are blanking, pre-forging and final forging. The die of the final forging die is determined by the size and shape of the forging, plus the margin and deviation. Die forging is generally divided into open die forging and closed die forging: the open die forging die has a burr groove 5 around it, and the excess metal flows into the groove after forming, and finally the burr is cut off; the closed die forging is only small at the end. The burrs, if the billet is accurate, can also be free of burrs.
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