Experimental investigation of the three-component forces in finish dry hard turning of hardened tool steel at different hardness levels
Experimental investigation of the three-component forces in finish dry hard turning of hardened tool steel at different hardness levels
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DOI：
10.1007/s00170-013-5423-x
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发表时间：
2013-10
期刊：
影响因子：
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通讯作者：
L. Tang;Chengxiu Gao;J. Huang;Xiaojun Lin;Junping Zhang
中科院分区：
文献类型：
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作者：
L. Tang;Chengxiu Gao;J. Huang;Xiaojun Lin;Junping Zhang
利用PCBN刀片对AISID2硬化工具钢进行了切削速度、切深、进给量、工件硬度(51、55、58、62和65 ± 1HRC)、刀具后刀面磨损和刀尖半径对干硬车削三分力的影响试验研究。实验结果表明，在AISI D2的三分力中，进给力最小，而切削参数对进给力的影响小于其他两个分力。切削速度、切深和进给量分别为0.10~0.40和0.05~0.20 mm时，径向力的值大于切削力的值，而在0.8~1.6 mm的刀尖半径范围内，径向力的值小于切削力的值。当工件硬度在51~58 ± 1 HRC范围内变化时，切削力的值大于径向力的值，而在62~65 ± 1 HRC范围内，切削力的值小于径向力的值。此外，三分力的变化规律与切屑的软化效应、刀具-切屑结合区的内聚效应、工件表面金属的软化效应有关。高后刀面磨损的形成增加了与工件表面的接触，从而在瞬时高温下产生撕拉和焊接效应。
In this paper, the effects of cutting speed, depth of cut, feed, workpiece hardness (51, 55, 58, 62, and 65 ± 1 HRC), tool flank wear, and nose radius on three-component forces in finish dry hard turning (FDHT) of the hardened tool steel AISI D2 were experimentally investigated by utilizing the PCBN inserts. Experimental results showed that the feed force is the lowest in three-component forces and influence of cutting parameters on it is less than two others in the FDHT of AISI D2. Values of the radial force are higher than those of the cutting force when cutting speed, depth of cut, and feed range from 75 to 301 m/min, and 0.10 to 0.40 and 0.05 to 0.20 mm, respectively, but lower in the range between 0.8- and 1.6-mm nose radius. Values of the cutting force are higher than those of the radial force as the workpiece hardness varies from 51 to 58 ± 1 HRC while lower in the range between 62 and 65 ± 1 HRC. Besides, there are relations between the changing laws of three-component forces and the softening effect of chip, cohesion effect in the tool–chip junction zone, and intenerating effect of metal in the workpiece surface. The high flank wear formation increases the contact with workpiece surface and hence induces tearing–drawing and welding effect duo to instantaneous high temperature.