Simulation And Analysis Of Process Process Of Plasma Beam Surface Strengthening Robot

As an important technical means of material surface heat treatment,plasma beam surface hardening has been widely used in production practice.At the same time,because of its flexibility,versatility and programmability,the industrial robot control technology and plasma beam surface hardening technology combined operation platform has a broader development prospects.Due to the comprehensive influence of actual quenching equipment,properties of metal materials and various parameters,the universality of plasma beam quenching process is very poor,and it still needs a lot of experiments to obtain better process parameters,which makes the processing cost too high.Therefore,it is of great significance to simulate and analyze the temperature and hardening layer of plasma beam surface quenching process by means of computer-aided technology for formulating reasonable process parameters.In order to improve the surface quality of plasma beam quenching,the motion simulation of plasma beam quenching driving equipment and the temperature field simulation of quenching process are analyzed in this paper.Firstly,a 6-DOF robot is used as the driving equipment of plasma spray gun.Based on the characteristics of plasma beam surface texture quenching,the end trajectory of the robot is planned in Cartesian space,and the motion simulation of the robot is carried out by ADAMS software.The trajectory of the end-effector and the variation curves of the angle,angular velocity and angular acceleration of each joint are obtained.Stable processing of four-channel plasma beam surface quenching track.Secondly,based on ANSYS Workbench platform,the transient temperature field of plasma beam local and complete quenching process is simulated by using Gauss heat source model,and the variation characteristics of temperature field and the distribution law of hardened layer are studied.The influence of different quenching parameters(arc power,heat source radius,scanning speed and workpiece thickness)on temperature field is analyzed,and the single work is studied.Based on the influence of process parameters on the processing technology,the orthogonal test method was used to design the three main factors,and the optimum parameter matching scheme was obtained by taking the depth of hardened layer as the inspection index.Finally,the influence of track spacing on the stability of temperature field in quenching process is studied.In the process of complete plasma beam quenching,the cumulative superposition of residual temperature in quenched area of workpiece results in the increase of subsequent quenching temperature field,which makes the peak temperature of each quenched zone different.The surface temperature field of workpiece under different scanning spacing is studied by contrast.The influence of scanning spacing on peak temperature of quenching zone is analyzed.The optimum spacing range is obtained,which makes the temperature field stable and ensures the stability of quenching process.