Improved annular jaw splice piece of hydraulic draw-bench

Abstract

The invention discloses an improved annular jaw splice piece of a hydraulic draw-bench. The improved annular jaw splice piece of the hydraulic draw-bench comprises two or three fan rings. The fan rings are equal parts of a base. Each one of the fan rings has a cylindrical upper part and a conical lower part and is provided with a screwed round hole in a middle part. Square lugs are arranged on centers of top surfaces of the fan rings along inner circumferences and are distributed along the same circle locus. The screwed round holes are concentrically arranged closely to outer sides of the square lugs. The square lugs and the screwed round holes match with a hydraulic draw-bench grip. The improved annular jaw splice piece of the hydraulic draw-bench is designed into a fan ring contacting with an external diameter line of a steel pipe so that a clamping force is greatly increased; deformation of the steel pipe is effectively avoided; a cost rate is improved; and use is convenient.

Description

technical field [0001] The invention relates to a clamping device on a hydraulic pulling machine, in particular to an improved annular jaw insert of a hydraulic pulling machine. Background technique [0002] At present, the hydraulic inserts of hydraulic drawing machines on the market generally have two sheet structures. When the inserts clamp the head of the steel pipe, because only two sides are clamped, the head of the steel pipe must be forged to make the head forged. The punching and the insert fit each other to clamp the steel pipe. Due to forging, the head of the steel pipe is deformed, and the deformed head of the processed steel pipe needs to be cut off, so that the yield of the steel pipe is reduced, and the forging of the steel pipe head is increased. Hitting, cutting process, the overall product cost has also increased. Contents of the invention [0003] Aiming at the disadvantages of the prior art, the invention provides an improved annular jaw insert of a hy...

AI Technical Summary

Problems solved by technology

[0002] At present, the hydraulic inserts of hydraulic drawing machines on the market generally have two sheet structures. When the inserts clamp the head of the steel pipe, because only two sides are clamped, the head of the steel pipe must be forged to make the head forged. The punching and the insert fit each other to clamp the steel pipe. Due to forging, the head of the steel pipe is deformed, and the deformed head of the processed steel pipe needs to be cut off, so that the yield of the steel pipe is reduced, and the forging of the steel pipe head is increased. Beating and cutting processes, the overall product cost has also increased

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