Vibratory positioning and search of automatically assembled parts on a horizontally vibrating plane

Part motion on a horizontal plane, which is excited in perpendicular directions according to harmonic law, is analyzed in this paper, considering an unconstrained part on the plane and a part having elastic and damping constraints. Motion trajectories of the part were investigated, when the plane vibrates along a circular, elliptical or complex trajectory, which is obtained by subjecting the plane to excitation of different frequency. Based on the character of motion trajectories and taking into account the parameters of the dynamic system, 5 regimes of body motion were defined. Zones of existence of these regimes were established. Characteristics of body motion were determined as functions of coefficient of friction between the part and the plane, excitation amplitude, frequency and phase shift of the excitation signal

Experimental investigation of interference fit connection of mechanical components

The experimental setup was mounted, that allows monitoring and analyzing the vibratory connection process of a shaft and the bushing, when they are joined with interference. While changing the parameters of oscillations, the shaft and bushing connection time may be significantly reduced. Increasing the amplitude and frequency of vibrations also allows bigger penetration of the shaft into the bushing. The increase of pressing force allows reliable shaft connection in a wider frequency and amplitude range. It also helps to shorten the insertion time under constant parameters of vibrations

Mutual positioning of the being assembled cylindrical parts under controlled dry friction

Applied for automated assembly the displacement of the part under controlled dry friction is analyzed. The paper deals with vibrational non - impact displacement of a mobile - based body when the body is subjected to kinematical excitement. Based on a simplified dynamic model of vibratory displacement under controlled dry friction the areas of the system and excitation parameters sets exist with different motion regimes and when controlling dry friction at particular time intervals. There were formed dependencies of vibratory displacement from dynamic system and excitation parameters. Based on performed part–to–part positioning analysis were designed schemas of vibratory assembly devices under controlled of the dry friction those may be used for joining of the cylindrical part

Analysis of insertion process for robotic assembly

Insertion process of cylindrical parts with clearance for robotic assembly using vibratory excitation is analyzed in the paper. Mathematical model of vibratory parts insertion process, which determines peg contact with the chamfer of the bush, peg one point and two point contact with the bush hole, was formed. Simulation of cylindrical parts insertion process was performed. The influence of vibrations on the insertion process, when mobile based peg is kinematically excited in axial direction, was determined. The combinations of excitation and system parameters, under which insertion process duration is the shortest and the process is the most reliable, were detecte

Analysis of insertion process for robotic assembly

Insertion process of cylindrical parts with clearance for robotic assembly using vibratory excitation is analyzed in the paper. Mathematical model of vibratory parts insertion process, which determines peg contact with the chamfer of the bush, peg one point and two point contact with the bush hole, was formed. Simulation of cylindrical parts insertion process was performed. The influence of vibrations on the insertion process, when mobile based peg is kinematically excited in axial direction, was determined. The combinations of excitation and system parameters, under which insertion process duration is the shortest and the process is the most reliable, were detecte

Mutual positioning of the being assembled cylindrical parts under controlled dry friction

Applied for automated assembly the displacement of the part under controlled dry friction is analyzed. The paper deals with vibrational non - impact displacement of a mobile - based body when the body is subjected to kinematical excitement. Based on a simplified dynamic model of vibratory displacement under controlled dry friction the areas of the system and excitation parameters sets exist with different motion regimes and when controlling dry friction at particular time intervals. There were formed dependencies of vibratory displacement from dynamic system and excitation parameters. Based on performed part–to–part positioning analysis were designed schemas of vibratory assembly devices under controlled of the dry friction those may be used for joining of the cylindrical part

Mutual positioning of the being assembled cylindrical parts under controlled dry friction

Applied for automated assembly the displacement of the part under controlled dry friction is analyzed. The paper deals with vibrational non - impact displacement of a mobile - based body when the body is subjected to kinematical excitement. Based on a simplified dynamic model of vibratory displacement under controlled dry friction the areas of the system and excitation parameters sets exist with different motion regimes and when controlling dry friction at particular time intervals. There were formed dependencies of vibratory displacement from dynamic system and excitation parameters. Based on performed part–to–part positioning analysis were designed schemas of vibratory assembly devices under controlled of the dry friction those may be used for joining of the cylindrical part

Experimental analysis of the robotized assembly applying vibrations

Main stages of the vibratory assembly, i.e. part-to-part alignment and joining of the cylindrical parts are considered in the presented paper. The shaft is movably based in the remote compliance center device, which is attached to robotic gripper, while the bushing is immovably located on the platform of the vibrator and provided with vibratory excitation along the joining axis direction. The experimental setup and research technique are presented. Vibratory alignment duration dependences on bushing excitation frequency, amplitude of the acceleration and on the axial misalignment of parts were established. The areas of excitation and system parameters sets for reliable part-to-part alignment were determined. Dependences of shaft and bushing joining stages durations on bushing excitation frequency, amplitude and axial misalignment of the parts were analyzed. It was determined that vibratory excitation during the joining provides possibility to avoid jamming of the part

Vibratory positioning and search of automatically assembled parts on a horizontally vibrating plane

Part motion on a horizontal plane, which is excited in perpendicular directions according to harmonic law, is analyzed in this paper, considering an unconstrained part on the plane and a part having elastic and damping constraints. Motion trajectories of the part were investigated, when the plane vibrates along a circular, elliptical or complex trajectory, which is obtained by subjecting the plane to excitation of different frequency. Based on the character of motion trajectories and taking into account the parameters of the dynamic system, 5 regimes of body motion were defined. Zones of existence of these regimes were established. Characteristics of body motion were determined as functions of coefficient of friction between the part and the plane, excitation amplitude, frequency and phase shift of the excitation signal

Kūno pagal harmoninį dėsnį virpančios oro pagalvės dinamika

Vibrations of a part on a compressible and in-compressible air-cushion vibrating at harmonical fre-quency are analysed and applied to automatic assembling. The equations of pressure distribution in air-cushion be-tween the part and the supporting track surface are given. To solve them a finite elements model is set up. The pressure distribution equations are co-solved with the equation of motion of the part based on air-cushion vibrating ac-cording to harmonic law. The areas of the parameter com-binations of air supply and part excitation are determined at constant amplitude vibrations, at slightly and strongly modulated vibrations, at abruptly changing amplitude vi-brations and beating. The dependences of part vibrations amplitudes, beating period on frequency and amplitude of track excitation and air blow parameters are determined