Reduction in Axial Forging Load by Low-Frequency Torsional Oscillation in Cold Upsetting
Reduction in Axial Forging Load by Low-Frequency Torsional Oscillation in Cold Upsetting
复制标题
通过冷镦中的低频扭转振动减少轴向锻造载荷
DOI：
10.1007/s00170-017-0553-1
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
H. Utsunomiya
中科院分区：
文献类型：
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作者：
R. Matsumoto;J. Kou;H. Utsunomiya
在冷镦过程中，将最大频率为1.5Hz的扭转振动与轴向锻造载荷叠加，以降低轴向锻造载荷。在最大压缩速度为0.1mm/s的冷镦过程中，通过下模绕z轴旋转，以22.5°的最大交变振幅和0.5rpm的最大角速度扭转圆柱形铝工件。根据理论和实验结果确定了减载时的扭振条件。结果表明，在旋转/压缩速度大于15°/mm，扭转振幅大于1°的条件下，轴向锻造载荷降低5%以上。在旋转/压缩速度约为1700°/mm的镦粗中，轴向锻造载荷的最大减小约为80%。
Torsional oscillation with a maximum frequency of 1.5 Hz was superposed with axial forging load to reduce the axial forging load in cold upsetting process. A cylindrical aluminum workpiece was twisted by rotating the lower die around thez-axis with a maximum alternating amplitude of 22.5° and a maximum angular speed of 0.5 rpm during cold upsetting process with a maximum compression speed of 0.1 mm/s. The torsional oscillation conditions for the load reduction were determined from theoretical and experimental results. It was found that the axial forging load was reduced by larger than 5% under the following conditions: rotation/compression speeds larger than approximately 15°/mm and torsion amplitudes larger than approximately 1°. A maximum reduction in the axial forging load of approximately 80% was obtained in upsetting with a rotation/compression speed with approximately 1700°/mm.