A kind of pliers for bar upsetting

Abstract

The invention discloses a pair of pliers for bar upsetting. The pliers comprises a first plier rod and a second plier rod, wherein the first plier rod comprises an end part and a handle part, and theend part is semicircular arc-shaped; and the first plier rod is hinged with the second plier rod at the joint of the end part and the handle part. After the first plier rod and the second plier rod are merged, the end part of the first plier rod and the end part of the second plier rod form an empty chamber for containing a bar in a surrounding mode. One or multiple clamping mechanisms are arranged at the end part of the first plier rod, and each clamping mechanism comprises a clamping rod and an elastic piece. The clamping rod is embedded into the end part of the first plier rod and points tothe central axis of the empty chamber, and the elastic piece is supported between the clamping rod and the end part of the first plier rod. The pliers clamp the bar from the side face by the clampingmechanisms at the end part of the plier rod, so that the pliers have dual functions of positioning and fixing for the vertical bar, and all bars can maintain a good vertical degree on a platform of aforging press and are not affected by the condition whether the end faces of the bars are even or not.

Description

technical field [0001] The invention relates to the field of mechanical processing equipment, in particular to a pliers for bar upsetting. Background technique [0002] Bar upsetting is the basic process of many mechanical parts processing. The general operation steps of this process are: the worker uses pliers to take out the bar that has been burned to the red hot state in the electric furnace, and clamps the cylindrical surface of the bar so that the bar stands upright on the forging press. On the platform of the forging press, the punch of the forging press repeatedly strikes the end face of the bar, making the bar gradually thicker. [0003] In the prior art, the pliers used by workers to upset the bar are ordinary iron tongs, and the pliers only play an auxiliary role in fixing the bar. The verticality of the bar itself on the platform depends on whether the end face of the bar blank is sufficient smooth. If the end face of the bar blank has a certain degree of incli...

AI Technical Summary

Problems solved by technology

If the end face of the bar blank has a certain degree of inclination, the bar is easy to bend or become S-shaped during the upsetting process. This kind of bar needs to be further adjusted by workers in the subsequent process, which affects production efficiency.

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