Research On Process System Of Plasma Beam Surface Strengthening Based On Long Rod Parts

Compared with lasers,plasma beam energy density is relatively low,but because of its large energy beam heat source radius,large nozzle diameter,high processing efficiency,and process stability,it has been widely used in quenching,cladding,alloying,and on the actual production process.In the process of installation and use of long rod parts,excessive wear will cause the deformation to increase,reduce the overall accuracy of the system,and the wear form is difficult to detect in real time.Therefore,the surface of the parts is usually treated with special treatment during the processing to increase the service life of the workpiece.Taking into account the controllability and stability of the plasma beam surface strengthening process,the plasma beam surface quenching automated processing technology is introduced into the surface strengthening process system of long rod parts to meet the processing and use requirements of long rod parts.In order to verify the feasibility of this technology,the following contents are mainly studied.First,the development process and research results of plasma beam surface strengthening technology are analyzed,and the characteristics and advantages of plasma beam surface strengthening technology are summarized.Combining with the geometric characteristics of the long rod parts model,the definition of the temperature field and the classification of the heat source model in the surface strengthening process of the part are analyzed,and the basic parameter setting based on the workbench simulation environment and the simulation heat source movement path are introduced,and different sets of process parameters are defined to study the physical properties of the parts after surface strengthening by the plasma beam.Secondly,in actual production,it is necessary to achieve full surface quenching of long rod parts,but the overlapping area of the quenching zone is too large to easily cause tempering,resulting in uneven hardness distribution of the quenching zone,which is not conducive to storage of lubricating oil,use workbench to establish a simulation environment,by simulating the temperature field distribution in the plasma beam surface strengthening process,studying the temperature distribution of the quenching surface at different scanning speeds and heat flux densities,and assuming that the temperature of the quenching area is related to the distribution of the hardened zone,a hardened zone based on the scanning speed and heat flux is obtained.Width,depth distribution curve of hardened zone and full coverage conditions,and the formation of hardened zone and different influencing factors are studied.Furthermore,for the use of plasma beam to perform full surface quenching of long rod parts to improve the hardness and lubrication performance of the quenched surface,but during the quenching process,long rod parts are prone to thermal deformation due to the temperature rise of the quenched surface,use workbench to establish the simulation environment simulates the degree of elastic and plastic deformation of long rod parts strengthened by the plasma beam surface and the distribution of plastic deformation in the x,y,and z directions,and further studies the effects of different process parameters on the plastic deformation of the parts and in the x,y,and z directions the law of deformation influence.Finally,through the different sets of results obtained from the above simulation data,the multi-parameter regression algorithm and the BP neural network algorithm are used to fit,and the process parameter prediction model based on the surface strengthening process system of long rod parts is obtained,to combine and optimize the two algorithms,and finally get a more accurate prediction model.The ABB IRB 4600 robot is selected as the robotic arm to complete the path processing,and Robot Studio is used to build a process system simulation workstation to simulate the automated processing process.