往复式手动攻丝扭矩分离与降扭机理试验研究  

Experimental Study on Torque Separation and Torque Reduction Mechanism of Reciprocating Manual Tappinge

作　　者：陈婷 郑建明[1] 胡亚卿 曹超 赵晨 CHEN Ting;ZHENG Jianming;HU Yaqing;CAO Chao;ZHAO Chen(School of Mechanical and Mechanical Instrument Engineering, Xi′an University of Technology, Xi′an 710048, China)

机构地区：[1]西安理工大学机械与精密仪器工程学院,西安710048

出　　处：《机械科学与技术》2022年第2期239-245,共7页Mechanical Science and Technology for Aerospace Engineering

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。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.

关 键 词：往复手动攻丝 攻丝扭矩模型 挤压摩擦扭矩 切屑阻力扭矩 

分 类 号：TG5[金属学及工艺—金属切削加工及机床]