Automatic welding method of roof cover of passenger car

Abstract

The invention discloses an automatic welding method for the top cover of a passenger car, which belongs to the field of welding technology and comprises the following steps: A. Hoisting the top cover skeleton onto the tire membrane for positioning and clamping, and sequentially putting on the top side skin and the top middle cover skin, and positioned fixedly; B. One side of the skin passes through the CO 2 Intermittent welding is connected to the first beam in front of the roof frame, and the other side of the skin is clamped by the clamping device of the hydraulic tension mechanism to stretch; the skin and the first beam behind the roof frame are connected by CO 2 The plug welding connection is fixed; C. The automatic welding equipment of the gantry structure is adopted, the gantry moves intermittently from front to back, and the resistance welding machine is started at the same time for spot welding; after the spot welding is completed, the gantry moves back continuously, and the CO is started at the same time 2 Welding; D. Check welding quality, manual repair welding. It reduces the workload on the assembly line, meets the requirements of mass production, is easy to operate, and makes it easier to ensure the production process and product quality.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to an automatic welding method for a passenger car roof. Background technique [0002] At present, most bus factories use manual CO on the production line 2 Gas-shielded welding, on-site welding of large and medium-sized passenger cars—top cover skin; spot welding is used between the skin and the longitudinal beams on both sides of the top inner frame after simple stretching, and full welding is used between the skin and the skin. Apply sealant after welding. The main advantages of this method are simple and flexible operation, less investment in equipment, low power consumption, and strong adaptability to different models; the disadvantages are poor welding quality, insufficient skin tension, high labor intensity for welders, and grinding work after spot welding. The volume is large and the working environment is harsh. For this reason, the bus roof of a few manufacturers has a...

AI Technical Summary

Problems solved by technology

The main advantages of this method are simple and flexible operation, less investment in equipment, low power consumption, and strong adaptability to different models; the disadvantages are poor welding quality, insufficient skin tension, high labor intensity for welders, and grinding work after spot welding. Large volume, harsh working environment

For this reason, the bus roof of a few manufacturers has achieved low-level operation and adopted resistance welding. Although the use of resistance welding is the trend of bus skin welding, compared with most bus manufacturers, single- and double-sided single-point resistance welding The large energy consumed and the large water cooling system required are still the main problems