Spot welding apparatus

Abstract

A spot welding apparatus includes a stationary frame having a housing formed therein. An upper welding gun is mounted to a length direction of a pressing unit disposed in the housing of the stationary frame. A plurality of lower welding guns are mounted on an outside of the stationary frame and ends of the plurality of lower welding guns selectively face one end of the upper welding gun in a length direction of the lower welding guns by the plurality of lower welding guns. A plurality of actuators are mounted on the outside of the stationary frame. A plurality of link units are disposed between the actuators and the lower welding guns, connect the actuators and the lower welding guns, respectively, and rotate as the actuators are operated.

Description

[0001] Cross-references to related applications [0002] This application claims the benefit of priority from Korean Patent Application No. 10-2014-0095819 filed on Jul. 28, 2014, the entire contents of which are incorporated herein by reference for all purposes. technical field [0003] The present disclosure relates to a spot welding device. More particularly, the present disclosure relates to a spot welding apparatus for selecting a lower welding gun to fit a welding point of a welding object. Background technique [0004] Typically, the vehicle manufacturing process incorporates a number of structural sub-processes, including a welding process for press-formed body panels and a finishing process for painting the body surface. [0005] Then, in the assembly process, powertrain components and components of systems such as suspension systems, steering systems, braking systems are assembled, and then doors, trunk lids, hoods, and the like are assembled. [0006] In the bod...

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Problems solved by technology

[0010] However, spot welding of the related art has disadvantages in that it takes a long period of time to perform a required number of welds, and the productivity and efficiency are poor because a set of spot welding units is installed on the robot arms of each set of robots, This allows the robotic arm to form a spot weld per movement

[0011] In addition, spot welding of the related art requires a lower welding torch whose shape varies with the position and shape of the welding spot, so that equipment investment expenditure is increased, and particularly, because such a plurality of robots are required, that is, the A plurality of robots each have a spot welding unit with a lower welding gun of a special shape applied thereto, so welding of the related art has disadvantages in that equipment costs and maintenance costs increase, energy is excessively used, and the occupancy rate of robots increases

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