Square steel pipe cold-drawing repairing device and method

Abstract

The invention provides a square steel pipe cold-drawing repairing device and method. The repairing device comprises a clamp, a die holder, an outer die, hollow pulling rods and a plurality of connecting sleeves, a plurality of square steel pipes are connected in a supporting fit mode through the connecting sleeves, and the ends of the sides, away from the clamp, of the hollowing pulling rods are provided with the connecting sleeves. The guiding sections of the connecting sleeves at the ends enable the to-be-repairedsquare steel pipes at the tail ends to be mounted on the pulling rods in limited and sleeving mode, one end of each to-be-repaired square steel pipe is sleeved with the locking section of the corresponding connecting sleeve, and the other end of the each to-be-repaired square steel pipe is sleeved with the guiding section of the corresponding connecting sleeve. Therefore, in the drawing repairing process of the large-curvature square steel pipes, the size is released in theprocess from bending to straightening, the tail ends of the square steel pipes extend, the distance can exactly enable the tail ends of the square steel pipes in the repairing process to freely extend, and the technological problems that the surfaces of the steel pipes wrinkle in the drawing repairing process and materials are stacked at the tail ends are solved; and the technological effects thatbatch repairing of the square steel pipes is achieved, the repairing range is wide, and the repairing effect is good are achieved.

Description

Technical field [0001] The invention relates to the technical field of steel pipe repair, in particular to a square steel pipe cold drawn repair device and a repair method. Background technique [0002] Steel pipes will inevitably be deformed and bent during use, so it is often necessary to repair steel pipes. At present, the methods of repairing steel pipes mainly include multi-roll straightening, mold correction, and drawing repair. For longer steel pipes, most of them are repaired by drawing. In the prior art, since one end of the steel pipe needs to be fixed with clamps during cold drawing, the size of this section of steel pipe will change after cold drawing, and the shape It will also change. This section of material will be removed as scrap, causing a certain amount of material loss; another repair method is to weld one end of the steel pipe as a cold drawn chuck, which will cause the mechanical properties of the steel pipe in the weld area due to welding heating Signific...

AI Technical Summary

Problems solved by technology

[0008] The invention provides a square steel pipe cold-drawn repair device and repair method, which solves at least the following technical problems in the prior art square steel pipe repair device and repair method: In other words, since one end of the steel pipe needs to be fixed with clamps during cold drawing, the size and shape of this section of steel pipe will change after cold drawing, and this section of material will be cut off as waste, resulting in a certain amount of waste. damage; for welding a section of steel pipe at one end of the steel pipe as a cold-drawn chuck, the mechanical properties of the steel pipe in the weld area will change significantly due to welding heating, which will affect the product quality; In terms of pushing the steel pipe through the drawing die, it is easy to cause the material of the pipe to accumulate at the end of the push force, which affects the dimensional accuracy of the end of the pipe. Wrinkles are prone to occur under the bottom, and because the curvature changes from curved to straight after being pushed into the mold, the size becomes significantly larger, and it is even difficult to correct and repair during the push-in process

Images