Precision steel pipe chuck-free cold drawing repairing device and method

Abstract

The invention discloses a precision steel pipe chuck-free cold drawing repairing device and method. The precision steel pipe chuck-free cold drawing repairing device comprises a clamp cylinder, a mold base and an outer mold. One end of a pull rod is fixed to the clamp cylinder, and the other end of the pull rod is externally sleeved with a plurality of to-be-repaired steel pipes. The multiple to-be-repaired steel pipes are connected through intermediate connecting sleeves in a supported and matched mode. A back cover is fixedly installed at the other end of the pull rod. The tail section of to-be-repaired steel pipe is limited and installed on the pull rod in a sleeving mode through the back cover. When cold drawing repairing is conducted through the repairing tool, a chuck does not need to the manufactured, thus, the performance of the steel pipes cannot be changed, and the repairing rate and the yield of the steel pipes can be greatly increased.

Description

technical field [0001] The invention belongs to the field of lubrication systems, and in particular relates to a clamp-free cold-drawn repair device and method for precision steel pipes. Background technique [0002] With the higher requirements for steel pipes in construction machinery, marine oil and other industries, high-precision, high-performance cold-drawn steel pipes have begun to be widely used. When the steel pipe is cold-drawn by the conventional method, since one end of the steel pipe needs to be fixed with a clamp 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 used as The waste is cut off, causing a certain amount of material loss. Especially for steel pipes that have been sawn to the target length, if size or shape problems are found and need to be repaired, since the steel pipes have no margin to be wasted, they often need to be remade into shorter lengths or other spe...

AI Technical Summary

Problems solved by technology

When the steel pipe is cold-drawn by the conventional method, since one end of the steel pipe needs to be fixed with a clamp 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 used as The waste is cut off, causing a certain amount of material loss

Especially for the steel pipes that have been sawed to the target length, if the size or shape problems need to be repaired, since the steel pipes have no allowance to be wasted, they often need to be remade into shorter lengths or other specifications, resulting in certain losses

[0003] Another repair method is to weld a steel pipe at one end of the steel pipe as a cold-drawn chuck, so that the mechanical properties of the steel pipe in the weld area will change significantly due to welding heating, which will affect product quality.

Images