If the workpiece does not need to be displaced during the whole welding process, it can be positioned on the workbench with a fixture, which is the simplest system. However, in actual production, more workpieces need to be displaced during welding, so that the weld can be welded in a better position (posture). In this case, the positioner and the robot can move separately, that is, the robot is welded again after the positioner is displaced; It can also move at the same time, that is, the positioner moves while the robot is welding, which is often said that the positioner and the robot move in coordination. At this time, the movement of the positioner and the robot are combined, so that the movement of the welding torch relative to the workpiece can meet the requirements of both the weld trajectory and the welding speed and the posture of the welding torch. In fact, at this time, the axis of the positioner has become a part of the robot. This welding robot system can have as many as 7-2 axes, or more. The latest robot control cabinet can be a group of two robots cooperating with 12 axes to coordinate movement. One of them is a welding robot, and the other is a handling robot used as a positioner.
If the welding robot workstation is further subdivided, the following four types can be obtained:
1.1 Box welding robot workstation is a special equipment specially developed for box welding with high production capacity and high welding quality and size requirements in the box industry.
The box welding robot workstation consists of an arc welding robot, a welding power supply, a welding torch wire feeder, a rotary double-position positioner, a fixture and a control system. This workstation is suitable for welding all kinds of box-like workpieces. In the same workstation, automatic welding of various boxes can be realized by using non-stop fixtures, and the welding position is high. Due to the adoption of the dual-position positioner, while welding, other stations can disassemble and assemble the workpiece, which greatly improves the welding efficiency. Because MIG pulse transition or CMT cold metal transition welding process is adopted for welding, the heat input in the welding process is greatly reduced, and the product is not deformed after welding. By adjusting the welding specification and robot welding posture, the weld quality of the product is good and the weld is beautiful, especially for stainless steel gas chambers with high sealing requirements, the gas in the gas chamber is not leaked after welding. By setting the variety selection parameters in the control system and changing the working fixture, the automatic welding of multiple variety boxes can be realized.
With arc welding robots with different working ranges and positioner with corresponding size, the workstation can meet the welding requirements of various boxes with weld length of about 2 mm.. The welding speed is 3-1 mm/s. According to the basic material of the box, different types of gas shielded welding are used in the welding process. The workstation is also widely used in electric power, electricity, machinery, automobile and other industries.
1.2 stainless steel gas chamber robot flexible laser welding processing equipment is a flexible robot laser welding processing equipment developed for welding box-type workpieces with large welding deformation and high sealing requirements. The processing equipment is composed of a robot, a laser generator set, a water cooling set, a laser scanning and tracking system, a flexible positioner, a fixture, a safety guardrail, a dust suction device and a control system, etc. By setting the variety selection parameters in the control system and replacing the fixture, automatic welding of multiple varieties of stainless steel air chamber workpieces can be realized.
1.3 axis welding robot workstation is a special equipment specially developed for rotating shaft welding in universal circuit breaker in low-voltage electrical appliance industry, and a set of special rotating shaft welding robot workstation is introduced.
The workstation of shaft welding robot is composed of arc welding robot, welding power supply, welding torch wire feeder, rotary double-position positioner, fixture and control system. This workstation is used for welding all kinds of workpieces based on rotating shaft (with several cantilevers on it), and various kinds of rotating shafts can be automatically welded by using different fixtures in the same workstation. The welding position accuracy is very high. Due to the adoption of the double-position positioner, while welding, other stations can disassemble and assemble the workpiece, which greatly improves the efficiency.
technical indicators: the diameter of the rotating shaft is Ф 1-5 mm, the length is Ф 3-9 mm, the welding speed is 3-5 mm/s, the welding process adopts MAG mixed gas shielded welding, the positioner rotates, and the positioning accuracy reaches .5 mm.
it is widely used for welding various workpieces with rotating shafts with high quality and precision, and is suitable for industries such as electric power, electricity, machinery and automobile. If manual arc welding is used to weld the rotating shaft, the labor intensity of workers is extremely high, the consistency of products is poor, and the production efficiency is low, only 2-3 pieces per hour. After using automatic welding workstation, the output can reach 15-2 pieces/hour, and the welding quality and product consistency are also greatly improved.
shaft welding robot workstation low-voltage electrical rotating shaft
1.4 robot welding stud workstation
robot welding stud workstation is used to weld studs with different specifications on complex parts to workpieces by robots. The workstation is mainly composed of robot, stud welding power supply, automatic nail feeder, robot automatic stud welding gun, positioner, fixture, automatic gun changing device, automatic detection software, control system and safety guardrail, etc. The studs are sent to the robot automatic welding gun through the automatic nail feeder, and the studs with different specifications are welded to the workpiece by programming the path taught by the robot on the workpiece. Energy storage welding or arc welding can be used to weld the stud firmly to the workpiece to ensure welding accuracy and welding strength. The welding efficiency is about 3-1 pieces/minute, and the specification of stud is 3-8mm in diameter and 5-4mm in length. The production line of welding robot is relatively simple to connect multiple workstations (units) with workpiece conveying lines to form a production line. This production line still maintains the characteristics of single station, that is, each station can only weld the predetermined workpiece with the selected workpiece fixture and welding robot program, and this line cannot weld other workpieces for a period of time before changing the fixture and program.
the other is welding flexible production line (FMS-W). The flexible line is also composed of several stations, but the difference is that the welded parts are all clamped on a unified pallet, and the pallet can be matched with the positioner of any station on the line and automatically clamped. Firstly, the welding robot system identifies the number of the pallet or the workpiece, and automatically calls up the procedure for welding this workpiece for welding. In this way, each station can weld different workpieces without any adjustment. Generally, the welding flexible line has a rail car, which can automatically take the fixed workpiece out of the storage station and send it to the positioner of the welding robot workstation with vacancies. You can also remove the welded workpiece from the workstation and send it to the outflow position of the finished product. The whole flexible welding production line is controlled by a scheduling computer. Therefore, as long as enough workpieces are assembled during the day and put on the storage station, no one or fewer people can produce at night.
which automatic welding production form the factory chooses must be determined according to the actual situation and requirements of the factory. The special welding machine is suitable for products with large batch and slow modification, and the number of welds on the workpiece is small and long, and the shape is regular (straight line, round); The welding robot system is generally suitable for medium and small batch production, and the welds of the workpiece to be welded can be short and many, and the shape is more complicated. Flexible welding line is especially suitable for the situation that there are many kinds of products and the quantity of each batch is very small. At present, foreign enterprises are vigorously promoting the management mode of JIT without (less) inventory. In this case, it is more appropriate to adopt flexible welding line. At present, welding robots have been widely used in automobile manufacturing industry, such as automobile chassis, seat frame, guide rail, muffler and hydraulic torque converter, especially in automobile chassis welding production. Toyota has decided to use spot welding as a standard to equip all its spot welding robots in Japan and overseas. This technology can improve the welding quality, and even try to use it to replace some arc welding operations. The movement time in a short distance is also greatly shortened. The company recently introduced a low-altitude spot welding robot, which is used to weld the lower parts of the car body. This short spot welding robot can also be assembled with a taller robot to process the upper part of the car body, thus shortening the length of the whole welding production line. Domestic production of Santana, Passat, Buick, Sail, Polo and other rear axle, sub-frame, rocker arm, suspension, shock absorber and other car chassis parts are mostly stress-bearing safety parts based on MIG welding process. The main components are stamped and welded, with an average thickness of 1.5 ~ 4 mm, and the welding is mainly in the form of lap joint and fillet joint, which requires high welding quality, and its quality directly affects the safety performance of cars. After robot welding, the appearance and internal quality of welded parts are greatly improved, the stability of quality is ensured, the labor intensity is reduced and the working environment is improved.
as an important part of marine engineering equipment technology, marine welding has now become an indispensable foundation and supporting technology for marine resources development and marine engineering construction. After a lot of process tests and formula adjustments, the welding materials and special equipment for underwater welding have been successfully applied to offshore oil production platforms in Shengli Oilfield, Hong Kong-Zhuhai-Macao Bridge and other offshore projects.