Expansion Fixture

Abstract

The invention discloses an expansion fixture. The expansion fixture comprises a base, a longitudinal beam which is movably arranged on the base in a back and force mode and an expansion part located on the side of the longitudinal beam, and the expansion part is connected to the longitudinal beam through a hinge component; the expansion fixture further comprises an operation part which drives the longitudinal beam to move back and forth, the operation part drives the longitudinal beam to move forwards to make the expansion part stretch out in the mode of being perpendicular to the longitudinal beam along a straight line and be locked on a working position, and the operation part drives the longitudinal beam move backwards to make the expansion part unlocked and retract to the original position. Due to the fact that for the whole welding process, expansion of a workpiece is achieved through the stretching motion of the expansion part, manipulation is easy, the welding efficiency is improved, the working intensity is reduced, the time and the labor are saved, welding and removing of a positioning piece such as a tool partition plate in a box-type workpiece inner cavity are not needed, therefore, the quality of the workpiece can be effectively guaranteed, and the defects that the workpiece is scratched, and the rejection rate is high are overcome.

Description

technical field [0001] The present invention relates to the field of clamping, in particular to an expansion clamp. Background technique [0002] Some long-length box-shaped, "U"-shaped, "H"-shaped and "I"-shaped workpieces, such as the outrigger slides and first-level outriggers inside the pump truck support platform, are generally "mouth"-shaped structures. Among them, the length of the first-level outrigger is generally 3.3 meters, and some are as long as 3.5 meters. [0003] When the box-shaped workpiece is assembled and welded, several partition plates are usually arranged in the inner cavity of the box-shaped workpiece along the length direction to ensure the distance between the two side plates and the upper and lower plates. After welding, steel pipes are used again. Push the divider down and hook it out. In this way, after welding, only the distance between the left and right side plates and the upper and lower plates can be guaranteed, but the straightness of up ...

AI Technical Summary

Problems solved by technology

In this way, after the welding is completed, only the distance between the left and right side plates and the upper and lower plates can be guaranteed, but the straightness up to 3 meters and the coaxiality of each partition cannot be guaranteed, which will cause the box-shaped workpiece to form A certain deflection will cause the outriggers and the outrigger slides of the support platform to not slide normally. Due to the high cost of the pump truck support platform, try not to scrap it. You can only repair the outriggers continuously, or make concessions to accept them, and the outriggers of the support platform will slip. The gap between the channel and the legs is uneven, which will cause quality degradation. In addition, when taking out the partition, it is labor-intensive and time-consuming, it is easy to scratch the workpiece, the quality is difficult to guarantee, and the scrap rate of the workpiece is high.

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