Circumferential feeding device of splicing pipeline welding system

Abstract

The invention relates to the technical field of welding, and provides a circumferential feeding device of a splicing pipeline welding system. The circumferential feeding device comprises a bottom pallet, a power and rotating device and a tensioning and releasing device, wherein the power and rotating device comprises a driving motor, a worm gear reducer and a rotating platform; the tensioning and releasing device comprises a tensioning handle, an upper tensioning disk, a lower tensioning disk and a tensioning block; the rotating platform is arranged on the bottom pallet; the worm gear reducer is arranged on the rotating platform; the worm gear reducer is connected with the driving motor; the tensioning handle is arranged above the worm gear reducer; notches are formed in the upper tensioning disk and the lower tensioning disk; the side surfaces of the tensioning block are respectively clamped in the notches in the upper tensioning disk and the lower tensioning disk. The circumferential feeding device disclosed by the invention has the beneficial effects that three-axis association for ensuring a geometric position of motion of a welding gun during welding of a splicing pipe is converted into two-axis association so as to be completed, the mechanical structure is simplified, and the weight of a mechanism is reduced.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a circumferential feed device for a welding system for plugged pipes. Background technique [0002] At present, there are mainly four methods of welding for plug-in pipes: (1) manual welding: flexible operation, but the quality of the weld is not easy to guarantee, the progress of the welding work is difficult to control, the labor intensity of the workers is high, and it is difficult to train senior welders; (2) the welding robot is fully integrated positional welding, the equipment cost is high and a large working space is required; (3) it is difficult to realize the welding of the pipeline work site by using a positioner for plug-in pipeline welding; (4) Ren Fushen et al. designed a new type of 5-freedom welding High-degree welding robot (Ren Fushen, Research on special welding robot system for pipe plugging based on PC+DSP mode [D], Beijing University of Technology, 2009), r...

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Problems solved by technology

[0002] At present, there are mainly four methods of welding for plug-in pipes: (1) manual welding: flexible operation, but the quality of the weld is not easy to guarantee, the progress of the welding work is difficult to control, the labor intensity of the workers is high, and it is difficult to train senior welders; (2) the welding robot is fully integrated positional welding, the equipment cost is high and a large working space is required; (3) it is difficult to realize the welding of the pipeline work site by using a positioner for plug-in pipeline welding; (4) Ren Fushen et al. designed a new type of 5-freedom welding High-degree welding robot (Ren Fushen, Research on special welding robot system for pipe plugging based on PC+DSP mode [D], Beijing University of Technology, 2009), realized robot anchoring, motion mechanism, welding torch attitude adjustment mechanism and wire feeding mechanism, designed A 2-degree-of-freedom automatic centering wrist mechanism was developed to realize the independent control of the position and attitude of the welding torch, and a kinematics model of a special welding robot was established. The working principle is as follows: the servo motor is fixed to the welding robot box, and the box is connected The supporting spindle is rigidly connected, and the supporting spindle is rigidly connected with the rising tension disc of the anchoring mechanism. The upper and lower tensioning discs are fixed to the inner side of the pipe wall of the insertion pipe during work, so the relative position of the servo motor and the insertion pipe is fixed

After the rotation of the servo motor shaft is decelerated by the gear box, the motion is transmitted to the rotating main shaft, and the rotating main shaft rotates with the rotating table to realize the rotating movement of the robot's waist. Other moving parts on the welding robot are installed on the rotating table, so during the welding process It also rotates with the rotary table, but the entire system of this rotary mechanism has a longitudinal feed and a welding torch clamping mechanism in addition to the rotating part. They all rotate together with the rotary table during welding. The weight of this part is difficult to be effectively balanced. Therefore, the center of gravity of the whole device will change continuously during welding, which will affect the stability and reliability of the entire welding equipment during welding, and affect the quality of the weld to a certain extent. In addition, the motion transmission part adopts gear reduction transmission , the deceleration ratio is relatively small, it is difficult to exert the performance of the motor itself, and it is difficult to use a stepping motor, which is not conducive to reducing the cost of the equipment

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