A kind of welding tongs

Abstract

The invention relates to an electrode holder, belongs to the field of welding and solves the problem that existing C-shaped electrode holders are difficult to rotate and operate due to the fact that centroids of the electrode holders seriously deviate from rotation axes when the throat width is larger. The electrode holder comprises a rotating disc and a support frame which is mounted on the rotating disc and can rotate relative to the rotating disc, wherein the length of the support frame is larger than the width of the rotating disc, the rotating disc is connected to the middle of the support frame, a first electrode holder arm and a second electrode holder arm are connected onto the support frame, the first electrode holder arm is C-shaped, the second electrode holder arm can be driven by a drive cylinder to cooperate with the first electrode holder arm, the drive cylinder is connected onto the support frame, and the first electrode holder arm and the drive cylinder are mounted in positions, located on two sides of the rotating disc, of the support frame. The rotating disc is arranged in the middle of the support frame, the first electrode holder arm and the drive cylinder are arranged on two sides of the rotating disc respectively, so that the rotation axis is closer to the centroid of the electrode holder, the effect on rotation is smaller, and the electrode holder is more convenient to operate.

Description

technical field [0001] The invention relates to the field of welding, in particular to a welding tongs. Background technique [0002] Existing spot welding tongs, as patent document CN202278301 discloses a kind of water-cooled spot welding tongs, such as image 3 As shown, the water-cooled spot welding tongs has a cylinder 1, and the drive shaft 12 of the cylinder passes through the cylinder body of the cylinder. The power output end of the drive shaft 12 , that is, the front end of the drive shaft is fixedly connected to the first welding tip 2 . A cylinder flange 3 is installed near the front end of the drive shaft on the cylinder body. A water ring 4 is set on the cylinder flange 3 . A "C"-shaped welding bow 5, one end of the welding bow is fixedly connected to the second welding tip 6, the other end of the welding bow is connected to the cylinder flange 3 through an adjustable flange clamp, the second welding tip is connected to the first welding tip The welding nozzl...

AI Technical Summary

Problems solved by technology

[0003] The cylinder of welding tongs with this structure is set in the turntable. Because the cylinder needs to cooperate with the welding tip, it must be arranged at the end of the welding arm. Due to the limitation of the size of the turntable, the turntable can only be installed at the end of the welding arm. When the throat width of the welding arm is large, the eccentricity of the welding arm relative to the turntable is relatively serious, resulting in a large eccentricity between the rotation axis of the turntable and the center of mass of the welding arm rotation. When the angle of the welding arm needs to be adjusted, a large force is required to turn the welding arm. It is inconvenient, and it will also lead to difficult operation, and the welding tongs are not easy to stabilize, etc.

Images