Welding robot application technology is a fusion of robot technology, welding technology and system engineering technology. Whether welding robot can be applied in actual production and exert its superiority depends on the common improvement of these technologies, system engineering technology is robot technology and Adhesive for welding technology. Taking the MOTOMAN robot of Yaskawa Electric as an example, in the development of robots of the past generations, it has completed the development of a number of special welding functions around the welding equipment, such as the gradient adjustment function of welding parameters and the use of TIG welding. The intermittent filler wire welding function, arc welding sensor (arc tracking) function and real-time welding monitoring function of the pendulum welding synchronization technology are all driven by the demand of the welding process. It can be said that MOTOMAN leads the development of the world arc welding robot.
Similarly, in order to realize robotic automatic welding, welding equipment manufacturers have also made many considerations for robot matching in the design of welding power source. Among them, robot control of welding power source is especially important, usually digital I/O mode and bus mode. The digital I/O control method is relatively simple, but the advantages of the welding power supply itself are difficult to fully exert. In recent years, the development of digital welding power supply has improved the control of the welding process. The influence of different working objects and working environment on the welding quality has been summarized by the welding equipment manufacturer as welding expert data stored in the welding power source. Obviously, such a large amount of data has been difficult to reflect the superiority of the new technology of the welding power source through the digital I/O method, so the bus control method is favored by more customers who are pursuing higher requirements.
In this context, the MOTOMAN robot manufacturer, which is known for its arc welding, cooperated with Fronius, which is mainly engaged in welding power supply for robots, to develop an Ethernet communication control method between the robot and the welding power source, as shown in the following figure. The robot control cabinet can control up to 3 welding power sources.
In conjunction with the Ethernet communication interface of the Fronius welding power supply, Yaskawa Electric has specially developed the robot system software, and uses the welding method of the robot teaching box to call the expert system of the welding power source.
MOTOFRO Ethernet communication software, like the MOTOMAN standard arc welding port, also provides welding arcing condition files and arc-extinguishing condition files.
On the window of the teaching box, there is a screen as shown below to synchronize the welding production process.
Through MOTOFRO Ethernet communication software, it is convenient to realize MOTOMAN's control of Fronius welding power supply, and also maximize the utilization of expert system data of welding power source, which truly reflects the design concept of “good horse with good saddleâ€, Fronius welding power supply and The combination of MOTOMAN further enriches the application of MOTOMAN in the field of arc welding.
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