In order to decrease precision forming force of spur gear, in this paper, the new warm extruding forming method has been brought forward on the base of the common closed-die forming method,which is the technology of 2 steps forging of spur gears utilizing radius direction leaded flow and constrained divided-flow method.3D elastic-plastic finite-element is used to simulate the forging process in detail.The effective stress distribution and the load-stroke curve of the whole process are got.The results of the simulation show that compared with closed-die forming, 2 steps forging can evidently decrease the forming force, improve metal flow , ensure completely filled gear teeth , meliorate the stress state of die and improve the quality of the formed spur gear.
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The experimental results show that isothermal precision forming technology with local loading is effective to control metal flow and improve forming quality of rib-web parts.
实验结果表明局部加载等温成形技术可以有效地控制金属的变形流动，提高筋板类锻件的成形质量。
The invention realizes the continuous adjustment for variable flow of rolling oil so as to improve the control level for cooling of rolling mill and satisfy the machining demand for nonferrous metal.
本发明实现了对轧制油连续变流量调节，有利于提高轧机冷却控制水平，满足有色金属加工之要求。
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