Automation welding system method of hollow stationary blades of steam turbine

Abstract

The invention provides an automation welding system method of hollow stationary blades of a steam turbine. By adopting the method, the existing manual welding method is replaced, the labor intensity of workers is reduced, the working efficiency is improved, the difficulty that welding equipment is hard to recognize and adjust a welding position owning to consistency difference before groove welding of an inner arc sheet and a back arc sheet of the hollow stationary blade is overcome, the problem that common automatic welding equipment can not adjust the welding position in real time accordingto the features of a groove of a workpiece is effectively solved, the process flow of the existing manual welding is improved, the number of welding seams is reduced and welding deformation is reduced. The inner arc sheet and the back arc sheet of the hollow stationary blade of the steam turbine are assembled on a fixture and fixed. The automation welding system method is characterized in that preprocessing is carried out to a groove of a steam outlet edge of the hollow stationary blade firstly, then balance arc process welding is carried out to the steam outlet edge and a steam inlet edge ofthe hollow stationary blade of the steam turbine by adopting a welding robot system with arms and gas shielded arc welding equipment with a consumable electrode, a laser tracker with a scanning function is arranged in front of a welding gun of the arm of a welding robot, and in welding, the laser tracker is utilized to scan the groove corner lines of the hollow stationary blade with thin sheets, and the position of the welding gun can be automatically adjusted according to the change of the features of the groove so as to finish the welding operation finally.

Description

technical field [0001] The invention relates to the technical field of welding processing of hollow stator blades of steam turbines, in particular to an automatic welding system method of hollow stator blades of steam turbines. Background technique [0002] The hollow vane of the steam turbine is welded by two stamped inner and back arc thin plates. Due to the deviation of the thin plates in the process of stamping and groove milling, the grooves of the inner and back arc plates of the hollow vane are in the There are large consistency differences before welding, such as groove position deviation, groove angle deviation, and groove depth deviation, which are not conducive to the identification and adjustment of welding positions by automatic welding equipment, and because the robot system design After setting the program, the position of the welding torch remains unchanged. When the position, angle or depth of the welding groove deviates due to the deviation of the workpiece...

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Problems solved by technology

[0003] In view of the above problems, the present invention provides an automatic welding system method for the hollow stator blade of a steam turbine, which can replace the previous manual welding method for such blades, reduce the labor intensity of workers, improve the processing efficiency, and at the same time overcome the problems of the inner and back of the hollow stator blade. Due to the difference in the consistency of the groove before welding, the arc thin plate is not conducive to the difficulty of identifying and adjusting the welding position by the welding equipment, and can effectively solve the problem that the general automatic welding equipment cannot real-time determine the welding position according to the shape of the workpiece groove during the welding process. The problem of adjustment; and the inventive method improves the technological process of manual welding in the past, reduces the number of welding passes of welding seam, reduces welding distortion

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