The Resistance Brazing Technology Of Titanium Starting Sheet And Copper Ears

In order to achieve the overlap link of the larger area between titanium plate and copper plate,we conducted some experiments to study resistance brazing technology of Ti and red copper,whose overlap area is larger,using the good performance of silver-based brazing filler metal and flux which was completed on the numerical control AC resistance welding machine.Taking advantage of orthogonal analysis,furthermore conducting repeatedly experiments,welding for specimen of larger overlap area was successfully realized.In the meanwhile,The temperature field simulation of the weld process is made by ANSYS software.It had the impetus function to develop the welding between titanium plate and copper plate and the apply of resistance brazing technology.By means of orthogonal test and field testing repeatly,the optimized processing parameters for the specimen of 15mm×15mm×3mm was determined.It was shown by the result that,under argon shield circumstances,when the welding current was 8KA,the welding time was 90 cycle,the welding pressure was 0.4 MPa,shear strength of the single-lap joint was good performance,whose averages was over 90 Mpa.At the same time,we also weld the larger ones,whose overlap area was 70mm×50mm.The results show that we would achieve greater overlap area of workpiece and the mechanical property was good performance as long as the power of welding machine meet requirements.The combination of weld joint was studied through OM,EPMA etc.The analysis results show that the connection between titanium plate and copper plate was good performance, diffudion and fusing happened between the main metal atoms of solder and the base metal Ti and Cu,reached microscopic connection and without defects.We also analyse the influence of welding parameters such as current,time and pressure on the mechanical properties of the joints.The temperature field in the weld process was simulated by ANSYS software.The resistance brazing is a complicated process that relate to electricity,heat,mechanics, magnetism and metallurgy etc.The weld zone was modeled by SolidWorks,then the temperature field in the weld process was simulated of by ANSYS.In the result,the simulation of the temperature change in the weld process was inosculated with the experiment value.We plan to make a special resistance welding machine to weld Ti and red copper.We have done the original design by SolidWorks,and achieve virtual assemblage by the SolidWorks. At the same time,we accomplish dynamic simulation of welding process by animator.