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摘要：
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介绍两种自由锻工艺:改制大剪刃,由一件改为两件,采用修磨、均分料、局部预热进行气割然后两火锻造;锻制垫铁时采用反变形工艺,预先锻出与成形方向相反的变形量,自然成形后达到合格尺寸,并节约了大量的原材料。
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Two kinds of free forging technologies were introduced.The one was to reform the big scissor blade into two.The forged pieces went through the processes of abrading,averagely distributing weight and warming-up locally,gas cutting dividing and two stages forging.Secondly, the forging mat iron employed the reverse deformation technology.A certain deformation was preformed,which was in the reverse direction with that of forming. After natural figuration,it got qualified size and saved a large quantity of raw material.
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基金项目：
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作者简介：
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参考文献：
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[1]中国机械工程学会锻压学会.锻压手册(第一卷)[M].北京:机械工业出版社,1993.
[2]王全聪,郭会光.大型锻造的模拟研究[J].锻压机械,2002,(3):34-37.
[3]刘助柏.塑性成型新技术及力学原理[M].北京:机械工业出版社,1995.
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