Experimental Study on Torque Separation and Torque Reduction Mechanism of Reciprocating Manual Tappinge
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摘要: 小直径内螺纹攻丝存在扭矩大、丝锥易折断、螺纹质量差等问题, 目前仍以手动攻丝为主要加工手段。本文分析了手动攻丝往复式进退对攻丝扭矩的作用机理, 建立了考虑切削、挤压摩擦与切屑阻力的攻丝过程扭矩模型。通过试验测试获得了手动攻丝过程扭矩变化规律与攻丝扭矩的分离, 研究了往复式手动攻丝熨压次数与切屑碾压折断对摩擦扭矩及切屑阻力扭矩的影响规律。结果表明挤压摩擦扭矩与往复熨压次数呈指数减小规律, 切屑阻力扭矩随连续攻丝时间呈线性增长, 建立的攻丝扭矩公式可准确预测攻丝过程扭矩的变化趋势, 为实现自动仿人攻丝运动策略提供了依据。Abstract: There are some problems in small diameter internal thread tapping, such as large torque, easy to break tap and poor thread quality. In this paper, the effect mechanism of reciprocating advance and retreat of manual tapping on tapping torque is analyzed, and a torque model of tapping process considering cutting, extrusion friction and chip resistance is established. The effect of ironing times and chip rolling breaking on friction torque and chip resistance torque is studied by experiments and analysis. The results show that the extrusion friction torque and the number of reciprocating ironing times decrease exponentially, and the chip resistance torque increases linearly with the continuous tapping time. The established tapping torque formula can accurately predict the changing trend of the tapping torque, which provides a basis for the realization of automatic humanoid tapping motion strategy.
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表 1 调质45钢的物理机械特性参数
密度ρ/
(g·cm-3)弹性模量
E/GPa泊松比υ 抗拉强度
σb/MPa伸长率
δ/%收缩率
Ψ/%屈服强度
σs/MPa7.85 210 0.31 600 16 40 355 
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[1] 夏伟, 李元元, 周泽华. 梯形槽切削的切削力数学模型[J]. 华南理工大学学报(自然科学版), 1997, 25(3): 7-11 doi: 10.3321/j.issn:1000-565X.1997.03.002XIA W, LI Y Y, ZHOU Z H. Mathematical model of cutting force formed in trapezoid groove cutting[J]. Journal of South University of Technology (Natural Science), 1997, 25(3): 7-11 (in Chinese) doi: 10.3321/j.issn:1000-565X.1997.03.002 [2] 唐艳丽, 韩荣第, 鞠加彬. 难加工材料攻丝摩擦扭矩的试验研究[J]. 工具技术, 2007, 41(11): 61-64 doi: 10.3969/j.issn.1000-7008.2007.11.019TANG Y L, HAN R D, JU J B. Experimental investigation of friction torque for tapping hard-to-cut materials[J]. Tool Engineering, 2007, 41(11): 61-64 (in Chinese) doi: 10.3969/j.issn.1000-7008.2007.11.019 [3] 张德远. 振动攻丝抑制表面回弹的研究[J]. 航空工艺制技术, 1997(1): 12-15 https://www.cnki.com.cn/Article/CJFDTOTAL-HKGJ199701004.htmZHANG D Y. Studies on spring back of machined surface in vibration Tapping[J]. Aeronautical Manufacturing Technology, 1997(1): 12-15 (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-HKGJ199701004.htm [4] 张德远. 振动切削的精密微细切削特性[J]. 北京航空航天大学学报, 1993(4): 61-68 https://www.cnki.com.cn/Article/CJFDTOTAL-BJHK199304008.htmZHANG D Y. The mechanism of precision cutting in vibration cutting[J]. Journal of Beijing University of Aeronautics and Astronautics, 1993(4): 61-68 (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-BJHK199304008.htm [5] WAN M, MA Y C, FENG J, et al. Mechanics of tapping process with emphasis on measurement of feed error and estimation of its induced indentation forces[J]. International Journal of Machine Tools and Manufacture, 2014, 114: 8-20 [6] 穆金成, 谷美林, 谷国海, 等. 螺旋槽丝锥切削模型建立及切削过程模拟[J]. 工具技术, 2017, 51(1): 88-91 doi: 10.3969/j.issn.1000-7008.2017.01.023MU J C, GU M L, GU G H, et al. Spiral groove tap cutting modeling and simulation of cutting process[J]. Tool Engineering, 2017, 51(1): 88-91 (in Chinese) doi: 10.3969/j.issn.1000-7008.2017.01.023 [7] 陈志同, 王彦丰, 韩小刚, 等. 手动攻丝扭矩降低效果的实验研究[J]. 航空精密制造技术, 2002, 38(3): 32-34 https://www.cnki.com.cn/Article/CJFDTOTAL-HJZJ200203010.htmCHEN Z T, WANG Y F, HAN X G, et al. Study on the torque decreasing effect in hand tapping[J]. Aviation Precision Manufacturing Technology, 2002, 38(3): 32-34 (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-HJZJ200203010.htm [8] SAITO Y, TAKIGUCHI S, YAMAGUCHI T, et al. Effect of friction at chip-tool interface on chip geometry and chip snarling in tapping process[J]. International Journal of Machine Tools and Manufacture, 2016, 107: 60-65 doi: 10.1016/j.ijmachtools.2016.05.004 [9] DOGRA A P S, KAPOOR S G, DEVOR R E. Mechanistic model for tapping process with emphasis on process faults and hole geometry[J]. Journal of Manufacturing Science and Engineering, 2002, 124(1): 18-25 doi: 10.1115/1.1430237 [10] CAO T Y, SUTHERLAND J W. Investigation of thread tapping load characteristics through mechanistics modeling and experimentation[J]. International Journal of Machine Tools and Manufacture, 2002, 42(14): 1527-1538 doi: 10.1016/S0890-6955(02)00108-6 [11] 韩荣第, 殷宝麟, 崔永鹏. 难加工材料小孔振动攻丝试验研究[J]. 哈尔滨工业大学学报, 2008, 40(1): 50-53 https://www.cnki.com.cn/Article/CJFDTOTAL-HEBX200801015.htmHAN R D, YIN B L, CUI Y B. Investigation of small-hole vibration tapping in difficult-to-Cut materials[J]. Journal of Harbin Institute of Technology, 2008, 40(1): 50-53 (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-HEBX200801015.htm [12] 韩凤起, 张德远. 低频扭转振动攻丝促进排屑的机理研究[J]. 航空精密制造技术, 2008, 44(2): 13-15 https://www.cnki.com.cn/Article/CJFDTOTAL-HJZJ200802012.htmHAN F Q, ZHANG D Y. Study on the mechanism of chip Remomal of low-frequency torsional vibration tapping[J]. Aviation Precision Manufacturing Technology, 2008, 44(2): 13-15 (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-HJZJ200802012.htm [13] 李光军, 张德远. 难加工材料的低频振动攻丝研究[J]. 中国机械工程, 2004, 15(6): 494-497 doi: 10.3321/j.issn:1004-132X.2004.06.008LI G J, ZHANG D Y. Investigation of low-frequency vibration tapping in difficult-cutting matierals[J]. China Mechanical Engineering, 2004, 15(6): 494-497 (in Chinese) doi: 10.3321/j.issn:1004-132X.2004.06.008 [14] OEZKAYA E, BIERMANN D. Segmented and mathematical model for 3D FEM tapping simulation to predict the relative torque before tool production[J] International Journal of Mechanical Sciences, 2017, 128-129: 695-708 doi: 10.1016/j.ijmecsci.2017.04.011 [15] MA Y C, WAN M, YANG Y, et al. Dynamics of tapping process[J]. International Journal of Machine Tools and Manufacture, 2019, 140: 34-47 [16] 叶贵根, 薛世峰, 仝兴华, 等. 金属正交切削模型研究进展[J]. 机械强度, 2012, 34(4): 531-544 https://www.cnki.com.cn/Article/CJFDTOTAL-JXQD201204014.htmYE G G, XUE S F, TONG X H, et al. Advances in orthogonal cutting models[J]. Journal of Mechanical Strength, 2012, 34(4): 531-544 (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-JXQD201204014.htm -
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