Screw Insertion Method in Peg-in-Hole Assembly for Axial Friction Reduction
Zhi Liu,
Libin Song,
Zhimin Hou,
Ken Chen,
Shaoli Liu,
Jing Xu
Affiliations
Zhi Liu
Department of Mechanical Engineering, Beijing Key Laboratory of Precision/Ultra-Precision Manufacturing Equipment Control, State Key Laboratory of Tribology, Tsinghua University, Beijing, China
Libin Song
Department of Mechanical Engineering, Beijing Key Laboratory of Precision/Ultra-Precision Manufacturing Equipment Control, State Key Laboratory of Tribology, Tsinghua University, Beijing, China
Zhimin Hou
Department of Mechanical Engineering, Beijing Key Laboratory of Precision/Ultra-Precision Manufacturing Equipment Control, State Key Laboratory of Tribology, Tsinghua University, Beijing, China
Ken Chen
Department of Mechanical Engineering, Beijing Key Laboratory of Precision/Ultra-Precision Manufacturing Equipment Control, State Key Laboratory of Tribology, Tsinghua University, Beijing, China
Shaoli Liu
School of Mechanical Engineering, Beijing Institute of Technology, Beijing, China
Department of Mechanical Engineering, Beijing Key Laboratory of Precision/Ultra-Precision Manufacturing Equipment Control, State Key Laboratory of Tribology, Tsinghua University, Beijing, China
Peg-in-hole is one of the most frequent mating features between parts, where the large friction resistance and poor contact situations result in the failure of part mating. To address this problem, this paper proposes a screw insertion method in peg-in-hole assembly for axial friction reduction. First, the effect of screw motion on axial friction reduction is analyzed with point contact and face contact. Second, the screw insertion method in clearance-fit peg-in-hole assembly with point contact is discussed; this method works better than the conventional linear insertion method for jamming prevention; the reciprocate screw insertion strategy is also investigated to reduce the influence of axis offset on screw insertion. Third, the screw insertion method in interference-fit peg-in-hole assembly with face contact is discussed. Finally, axial friction reduction is validated with experiments of point contact with screw motion and experiments of screw insertion in clearance-fit and interference-fit peg-in-hole assembly.
