Large-diameter radian bending method of steel pipe and large-bend pipe bender

Abstract

The invention discloses a large-diameter radian bending method of a steel pipe and a large-bend pipe bender. A propelling oil cylinder is adopted to push a steel pipe clamping device to move horizontally; one end of the steel pipe is clamped by the steel pipe clamping device, and the other end of the steel pipe is clamped by a locating piece on a top bending mechanism; a bent part of the steel pipe is heated by utilizing a heating device; a lateral movement distance and a longitudinal movement distance of the steel pipe are tested through a distance measurement control system; the distance measurement control system comprises two distance measuring instruments; and one distance measuring instrument is mounted on a slide rail seat of the top bending mechanism to test data of the lateral movement distance of the steel pipe, and the other distance measuring instrument is mounted above the steel pipe to test data of the longitudinal movement distance of the steel pipe. After the lateral and the longitudinal movement distances and the set diameter of the steel pipe are operated by using a mixed logic, up-down movement of the locating piece and / or left-right horizontal movement of the top bending mechanism are timely adjusted, and finally, a set bend radius radian is achieved and accurate bending of the large-diameter radian of the steel pipe is completed.

Description

technical field [0001] The invention relates to a pipe bending method and device, in particular to a large-diameter, thick-walled large-radius arc bending method and device thereof. Background technique [0002] The pipe bending equipment currently on the market mainly includes cold bending pipe bending machines and intermediate frequency heating pipe bending machines. The cold bending machine cannot bend steel pipes with a diameter of φ219mm or more and a wall thickness greater than δ10.0mm. Although the traditional intermediate frequency heating pipe bending machine can make up for this shortcoming, it uses the rocker arm to clamp and rotate to complete the bending of the pipe fittings. The radius of the steel pipe bending depends on the length of the movable radius of the rocker arm. The radius of the pipe is about 10 meters, and the floor area is large, so the operation is very inconvenient. [0003] With the construction of large-scale truss structures such as aircraf...

AI Technical Summary

Problems solved by technology

The cold bending machine cannot bend steel pipes with a diameter of φ219mm or more and a wall thickness greater than δ10.0mm

Although the traditional intermediate frequency heating pipe bending machine can make up for this shortcoming, it uses the rocker arm to clamp and rotate to complete the bending of the pipe fittings. The radius of the steel pipe bending depends on the length of the movable radius of the rocker arm. The radius of the pipe is about 10 meters, and it occupies a large area, so it is very inconvenient to operate

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