Built-in wire clamping device

Abstract

The invention discloses a built-in welding wire clamping device. The built-in welding wire clamping device comprises a front end cover, an auxiliary cylinder, a front support, an auxiliary piston, a chuck, a main cylinder, a rear support, a main piston and a rear end cover which are all annular and are arranged coaxially; the auxiliary piston and the main piston apply backward force to the chuck together, so that the front end of the chuck retracts to clamp a welding wire. According to the built-in welding wire clamping device, the chuck and the external wall of the wiring wire are in surface contact; the welding wire is clamped by clamping force and is subject to common thrust of the front piston and the rear piston, so that the clamping force is great and the welding wire cannot be deformed. In addition, the built-in welding wire clamping device has the appearance of a rotating body and a very small radial size, and is suitable for being mounted in a hollow wrist arm of a welding robot for use and is small in occupied space; the arm action of the welding robot is more flexible after the built-in welding wire clamping device is mounted and used.

Description

technical field [0001] The invention relates to a welding wire clamping device of a welding robot, in particular to a built-in welding wire clamping device. Background technique [0002] At present, the welding wire clamping mechanisms used by welding robots are all external cylinder structures. like figure 1 As shown, this structure is that the clamping cylinder 13 is placed on the outside of the cable, the piston movement direction of the clamping cylinder 13 is perpendicular to the movement direction of the welding wire 15, and the welding wire 15 is braked by the clamping force of the cylinder. Because this clamping device is to rely on the radial force of the line contact of top wire 14 end face and welding wire 15 to provide the frictional force of clamping welding wire, thereby the clamping force that provides is limited, and welding wire 15 slides easily relative to top wire 14; And if If the jacking force is too large, the welding wire 15 will be deformed, which w...

AI Technical Summary

Problems solved by technology

Because this clamping device is to rely on the radial force of the line contact of top wire 14 end face and welding wire 15 to provide the frictional force of clamping welding wire, thereby the clamping force that provides is limited, and welding wire 15 slides easily relative to top wire 14; And if Excessive tightening force will cause the welding wire 15 to deform, which will affect the wire feeding, which is not conducive to welding

In addition, the external cylinder structure requires a large installation space, so this welding wire clamping device is not suitable for installation on the welding arm of a welding robot with a hollow wrist, so that the cooperation between the welding arm and the welding wire clamping part The structure is complicated, taking up more space and affecting the flexibility of movement

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