High-accuracy straightening machine for tantalum-niobium alloy pipe

Abstract

The invention relates to a high-accuracy straightening machine for a tantalum-niobium alloy pipe, comprising a straightening main machine, a hydraulic servo system and an electrical control system, wherein the straightening main machine adopts a structure of 2-2 (12) composite rolls and is provided with 6 pairs of straightening rolls which are symmetrically arranged up and down in all, wherein the first pair of straightening rolls, the second pair of straightening rolls and the third pair of straightening rolls are large rolls, the fourth pair of straightening rolls, the fifth pair of straightening rolls and the sixth pair of straightening rolls are small rolls, the shapes of the straightening rolls are all segmental equal-curvature reverse bending roll shapes, and roll spacings are differential roll spacings; and the hydraulic servo system and the electrical control system carry out closed-loop control on the displacement quantities of the straightening rolls and the pressure of the straightening main machine and carry out stepless speed regulation on a straightening speed. The high-accuracy straightening machine can achieve the diameter ratio of a straightened pipe at 1:5; the diameter of the straightened pipe is phi 15-phi 70 mm, a wall thickness is 0.254-0.381 mm, and the straightening accuracy can achieve 0.3 mm / m; in addition, the high-accuracy straightening machine can also be used for straightening the pipes made of high-strength alloy materials, such as high-quality alloy steel and the like.

Description

technical field [0001] The invention belongs to the technical field of machinery, and relates to a pipe straightening machine, in particular to a high-precision straightening machine for rare metal alloy pipes, especially suitable for high-precision straightening of tantalum-niobium alloys, large pipe diameters, and thin pipe walls. straightener. Background technique [0002] At present, rare metals and their alloy materials are more and more widely used in aerospace, electronic communication, nuclear power generation and other industrial fields, and higher requirements are put forward for the straightness (curvature) of pipes and rods, especially for high High-quality alloy materials require a straightness of less than 0.3mm / m. The pipe straightening machines of the prior art at home and abroad have been able to make alloy pipes reach a straightness of ≤0.3mm / m. For example, the Chinese patent No. ZL200820010643.4 and the application date are February 3, 2008 (the patent ...

AI Technical Summary

Problems solved by technology

The straightening accuracy of the straightening machine for alloy round pipes has reached 0.3mm / m", but the straightening machine can straighten high-strength alloy pipes with large diameters and thin walls, especially for straightened pipes with a diameter of Straightening of tantalum-niobium alloy tubes with a diameter of 15-70mm and a wall thickness of 0.254-0.381mm is still difficult to achieve

Images