Simulation And Testing Of Temperature Field And Stress Field Of Metal Parts

With the rapid development in the field of machinery manufacturing in China,in some key areas have been under the foreign technical blockade,in order to break down technical barriers,domestic began to increase research on advanced manufacturing,in advanced manufacturing,metal processing temperature field and stress field detection is one of the key technologies to solve the processing accuracy.Thermal stress generated by metal parts temperature field and forming residual stress will affect the processing quality and precision,hence we have to improve the processing quality and processing precision of the workpiece,optimize processing process,improve the level of advanced manufacturing industry,it is hightime to conduct in-depth research on the temperature field and metal parts processing stress field.This project first establishes a 3 D solid model of drilling simulation tools and workpiece,According to the actual drilling and processing parameters,The simulation experimental scheme of drilling and processing is designed,The drilling and processing of metal parts was simulated by ABAQUS finite element analysis software,The temperature field and stress field after drilling,For the simulation data under different drilling parameters,Data and data analysis was performed,According to the variation characteristics of the temperature field and the stress field,Optimize the drilling and processing parameters,The results show that when the average stress is used as the processing quality index of the hole surface,To improve the processing quality of the inner surface of the hole,reduce the speed and appropriately increase the feed speed under the effective drilling parameters;The average stress value of the hole increases under the influence of the temperature field,Maximum stress value is decreased.Secondly,in order to improve the temperature field detection accuracy,according to the actual processing environment,the infrared radiation propagation mechanism is in-depth analyzed,establish the infrared temperature measurement mathematical model,and simulate the processing environment containing atomization cutting liquid,an experimental platform is built,and the infrared temperature measurement mathematical model is verified.The atmospheric transmission rate in the infrared temperature measurement model is the main use parameter.Using the single image dark channel algorithm to solve the atmospheric transmission rate,the actual surface temperature of the measured object can be calculated according to the solution results.Based on the availability of the model,the metal drilling experiment,using the infrared temperature measurement,obtain the real temperature field,according to the finite element simulation analysis and verify the reliability of ABAQUS finite element simulation.Finally,in order to realize the synchronous measurement of the temperature field and the stress field,the temperature field and the stress field detection system were built according to the requirements of the project,and the hardware design and software programming were designed.In the hardware design,this project selects the infrared thermometer,X-ray stress detector,force sensor,data acquisition card and other instruments for the design;in the software design,this project uses Lab VIEW and MATLAB for hybrid programming,designs the front-end page of the software system,and realizes the measurement,data display and data preservation of the temperature field,stress field and its related physical quantities.This paper analyzes the temperature field and stress field based on ABAQUS drilling finite element simulation,and improves the temperature field measurement accuracy through theoretical model and experiment.Finally,the temperature field and stress field realize the simulation and effective test of metal field.