Design And Reliability Research Of The Label-Carrying Mechanism In The Label-Hanging Device For Wire Rods

The proposal of China Manufacturing 2025 announced that intelligence has become the primary goal of Chinese industry.Judging the merits of an automation device,in addition to achieving its basic functions,its reliability is another criterion.In the actual operating state of mechanical equipment,due to the existence of various influencing factors,whether it is design error or manufacturing error,mechanical equipment has the possibility of work failure.The demand for wire rods is increasing in all walks of life.However,the hanging labels on the wires are manually completed,which cannot meet the demand.In this paper,the Label-carrying Mechanism is taken as the object,and the mechanism design and reliability analysis are carried out.The main research work is as follows:Based on the design requirements of the Label-carrying Mechanism,the design scheme of the cam-link combination mechanism was determined.The curve of the swing kinematic suitable for the cam mechanism was analyzed,and the theoretical contour equation of the cam was obtained.The innovation of the six-bar mechanism was realized by the comprehensive method.The six-bar mechanism was scaled by combining the rigid body guidance and function generation method.The kinematics and dynamics analysis mathematical model of the six-bar mechanism was constructed by the pole group method.The kinematics and dynamics were solved,and the relative velocity and radial force at each kinematic pair were obtained,which provided data for subsequent wear calculations.Based on the ProE skeleton model,combined with the mechanism diagram of the Label-carrying Mechanism,the parameterized model of the Label-carrying Mechanism was programmed.The key kinematic parameters in the Label-carrying Mechanism were determined through the kinematic simulation analysis.Based on the sensitivity analysis of the Label-carrying Mechanism,the influence of the main design parameters on the Label-carrying Mechanism was carried out.The skeleton model was optimized for the Label-carrying Mechanism,which reduced the end angular acceleration of the execution by 13.61%.Considering the influence of basic size error,kinematic pair clearance and wear,the reliability mathematical model of the Label-carrying Mechanism is constructed.Under the condition of error,the kinematic accuracy and reliability of the Label-carrying Mechanism are calculated by numerical method;Based on ADAMS programming,the parametric model of the Label-carrying Mechanism is constructed.The sensitivity of the cam parameters and the link parameters to the end displacement of the Label-carrying Mechanism is studied.The Monte Carlo test is used to simulate the kinematic accuracy and reliability of the Label-carrying Mechanism,obtained the allowable limit error which is the minimum clearance between the wire and the label hole.