Impact testing is a primary method to evaluate the impact property of resistance spot welding,which is an important quality index in automotive industry.For testing impact properties of spot welds,many customized test...Impact testing is a primary method to evaluate the impact property of resistance spot welding,which is an important quality index in automotive industry.For testing impact properties of spot welds,many customized testers have been developed.This paper summarized some of the impact testers reported in open literatures and the emphasis was placed on the equipment structures,functions,technical parameters,advantages and disadvantage,etc.Some key issues about the development of the testers such as kinematic energy input mode,fixture design,combined load testing,sensor and data acquisition were discussed.Finally,the problems and prospects in the research and development of impact testers for spot welds were pointed out.展开更多
To solve the problems of mechanical cam, tracking in an automatic welding machine, a new method of programmable logic controller ( PLC) tracking is presented. Based on analyzing the forming of welding tracking, a math...To solve the problems of mechanical cam, tracking in an automatic welding machine, a new method of programmable logic controller ( PLC) tracking is presented. Based on analyzing the forming of welding tracking, a mathematical model of position control is set up. The experiments show that using a modified machine, PLC makes little welding positional error and can meet the product requirements.展开更多
The bonding process of space solar cells is a very complicated task undertaken by manual labor before.An automatic approach based on robot technology is presented to deal with the difficult problem.The architecture of...The bonding process of space solar cells is a very complicated task undertaken by manual labor before.An automatic approach based on robot technology is presented to deal with the difficult problem.The architecture of the bonding robot for space solar cells is described.The two processes carried out by the robot,adhesive dispensing and cover-glass bonding,are studied.Based on the mechanical model,the flow velocity field of the adhesive in needles is obtained and the cover-glass bonding theory is interpreted.According to the studies,the thickness of the adhesive can be controlled accurately by robot and bubbles can be avoided coming about inside the adhesive.展开更多
文摘Impact testing is a primary method to evaluate the impact property of resistance spot welding,which is an important quality index in automotive industry.For testing impact properties of spot welds,many customized testers have been developed.This paper summarized some of the impact testers reported in open literatures and the emphasis was placed on the equipment structures,functions,technical parameters,advantages and disadvantage,etc.Some key issues about the development of the testers such as kinematic energy input mode,fixture design,combined load testing,sensor and data acquisition were discussed.Finally,the problems and prospects in the research and development of impact testers for spot welds were pointed out.
文摘To solve the problems of mechanical cam, tracking in an automatic welding machine, a new method of programmable logic controller ( PLC) tracking is presented. Based on analyzing the forming of welding tracking, a mathematical model of position control is set up. The experiments show that using a modified machine, PLC makes little welding positional error and can meet the product requirements.
文摘The bonding process of space solar cells is a very complicated task undertaken by manual labor before.An automatic approach based on robot technology is presented to deal with the difficult problem.The architecture of the bonding robot for space solar cells is described.The two processes carried out by the robot,adhesive dispensing and cover-glass bonding,are studied.Based on the mechanical model,the flow velocity field of the adhesive in needles is obtained and the cover-glass bonding theory is interpreted.According to the studies,the thickness of the adhesive can be controlled accurately by robot and bubbles can be avoided coming about inside the adhesive.
