Resistance spot welding is considered to be the most important joining process in automotive body construction. Despite new technologies such as laser beam welding and adhesive bonding, spot welding still retains its solid position in the manufacture of automotive bodies. Since many factors affect the quality of spot welding and the quality standards for spot welding are high, it is necessary to systematically check the quality of the spot welds.
To this end, the past practice is to use random testing methods for random testing. Because of this method, there are some shortcomings, such as: the test sample will be destroyed or deformed, the test time is long, the workpiece will be damaged and loosened during the gouge, and the method of using the chisel will be used when using the "zinc binder". No bonding points can be found, so it is no longer suitable for modern manufacturing techniques and cost accounting. Here is a remedy - "dotted line ultrasonic test", in which solder joint inspection can be performed during the soldering process.
The “IQR System†is a new control process for online quality testing and optimization during resistance spot welding. This method can compensate for disturbances in some parameters of the control, such as changes in sheet thickness, changes in coating thickness, and wear loss of the electrodes, based on the U-I characteristic evaluation. Thanks to its simple operation, the IQR controller guarantees stable and reliable high quality spot welding and saves time and costs.
In the field of resistance spot welding, one can clearly see the obvious trend of using servo motor drives in welding equipment. At the International Essen Welding Exhibition in 2001, no fewer than 12 manufacturers demonstrated welding equipment using servo motor drive technology (mounted on micro spot welders, manual and robotic welding guns, and pedestal spot welders). ). According to experts' predictions, pneumatic welding equipment will be more and more replaced by servo-driven welding equipment due to good welding quality and short welding cycle. In addition, some manufacturers show that the welding torch is driven by an air-cooled servo motor, which has broad application prospects for welding tasks where the electrode needs force and the welding cycle time is required.
The micro spot welding device with the piezoelectric linear drive of the welding head has the ideal characteristics of resetting parameters and can easily program the moving route. Due to its robust mechanical structure and the use of piezoelectric drive technology, the time required to position the weld before and after is very short. Therefore, it is possible to switch from the work cleaning stage to the work stage without losing the opportunity to accumulate the power of welding. Thanks to its rugged construction and the use of a highly dynamic drive system, the torch tip is more suitable for use in automatic welding equipment and has a high welding efficiency.
Conventional welding torches for punch riveting and spot welding are challenged by more demanding high-productivity robots in terms of speed and accuracy. In order to achieve a large working range with the least degree of bending, a new generation of robotic welding torches has been carefully designed and manufactured using a very lightweight carbon fiber reinforced plastic (CFRP). According to the research results, a torch sample was produced after careful experimentation. The recently developed structure has a longitudinally reinforced, very strong curved arm and provides a powerful reaction force that can compensate for angular offset by online control. This application has spurred the potential for further development of better modern fiber materials for the manufacture of lightweight structures.
To this end, the past practice is to use random testing methods for random testing. Because of this method, there are some shortcomings, such as: the test sample will be destroyed or deformed, the test time is long, the workpiece will be damaged and loosened during the gouge, and the method of using the chisel will be used when using the "zinc binder". No bonding points can be found, so it is no longer suitable for modern manufacturing techniques and cost accounting. Here is a remedy - "dotted line ultrasonic test", in which solder joint inspection can be performed during the soldering process.
The “IQR System†is a new control process for online quality testing and optimization during resistance spot welding. This method can compensate for disturbances in some parameters of the control, such as changes in sheet thickness, changes in coating thickness, and wear loss of the electrodes, based on the U-I characteristic evaluation. Thanks to its simple operation, the IQR controller guarantees stable and reliable high quality spot welding and saves time and costs.
In the field of resistance spot welding, one can clearly see the obvious trend of using servo motor drives in welding equipment. At the International Essen Welding Exhibition in 2001, no fewer than 12 manufacturers demonstrated welding equipment using servo motor drive technology (mounted on micro spot welders, manual and robotic welding guns, and pedestal spot welders). ). According to experts' predictions, pneumatic welding equipment will be more and more replaced by servo-driven welding equipment due to good welding quality and short welding cycle. In addition, some manufacturers show that the welding torch is driven by an air-cooled servo motor, which has broad application prospects for welding tasks where the electrode needs force and the welding cycle time is required.
The micro spot welding device with the piezoelectric linear drive of the welding head has the ideal characteristics of resetting parameters and can easily program the moving route. Due to its robust mechanical structure and the use of piezoelectric drive technology, the time required to position the weld before and after is very short. Therefore, it is possible to switch from the work cleaning stage to the work stage without losing the opportunity to accumulate the power of welding. Thanks to its rugged construction and the use of a highly dynamic drive system, the torch tip is more suitable for use in automatic welding equipment and has a high welding efficiency.
Conventional welding torches for punch riveting and spot welding are challenged by more demanding high-productivity robots in terms of speed and accuracy. In order to achieve a large working range with the least degree of bending, a new generation of robotic welding torches has been carefully designed and manufactured using a very lightweight carbon fiber reinforced plastic (CFRP). According to the research results, a torch sample was produced after careful experimentation. The recently developed structure has a longitudinally reinforced, very strong curved arm and provides a powerful reaction force that can compensate for angular offset by online control. This application has spurred the potential for further development of better modern fiber materials for the manufacture of lightweight structures.
Cable Thimble,Thimble,Galvanized Wire Factory
Zhongji Rigging Co., Ltd. , http://www.carbon-steelrigging.com