Peg-bush alignment under elastic vibrations. Issue 4 (19th August 2014)

• Record Type: Journal Article
• Authors: Sadauskas, Edvardas; Baksys, Bronius
• Editors: Loughlin, Clive; Loughlin, Clive
• Is Part Of: Assembly automation. Volume 34:Issue 4(2014)
• Publication Date: 2014-08-19
• Subjects: Automation -- Periodicals; Automatic machinery -- Periodicals; Assembly-line methods -- Periodicals; Industrial engineering -- Periodicals; 670.42705
• DOI: 10.1108/AA-05-2014-031
• Languages: English
• ISSNs: 0144-5154

Abstract

Abstract : Purpose: The paper theoretically and experimentally investigates vibratory peg-bush alignment using elastic vibrations of the peg, when the peg is axially excited by a pressed piezoelectric vibrator on the upper end Design/methodology/approach: Experimental research of part alignment using elastic vibrations was performed and dependencies of alignment duration on excitation signal parameters and initial pressing force were defined for rectangular and circular cross-section parts. Mathematical model of two-mass dynamic systems with elastic contact model representing alignment process was created. Dependencies of system parameters on the alignment duration were obtained by numerically solving systems differential equations. Findings: Theoretical and experimental investigation approved the usage of elastic vibrations for alignment of chamferless circular and rectangular cross-section parts. This novel method of part alignment compensates axial misalignment between mating parts by directional displacement of movably based bush. Research limitations/implications: Impact and non-impact interaction between bush and peg is possible however only non-impact regime was investigated. Static and dynamic coefficient of friction between the parts is equivalent and do not depend on relative velocity of parts. Practical implications: The results are useful in designing reliable and effective assembly equipment with vibratory assistance alignment for peg-to-bush operations which do not require auxiliary sensors and feedback systems. Use of piezoelectric resonator for peg excitation makes this system easy adaptable to the existing automated assembly equipment. Originality/value: The proposed method is a new approach to vibratory alignment. The data obtained during investigation expands the insight of the physical processes that drive bush to the axial alignment direction.