Horizontal NC cold bending machine for large size components and its NC cold bending method

Abstract

The invention discloses a horizontal-type numerical control cold bending machine and a numerical control cold bending method thereof for large-size members. A mounting beam, a loading device, a supporting device, a displacement measuring device and a feeding device are arranged inside a forming assembly jig; to-be-bent members are fed from the back of the forming assembly jig and put on the feeding device, a member clamping mould clamps the to-be-bent members, and a loading oil cylinder is controlled to conduct loading; whether a real-time forming load is equal to a standard forming load or not is determined, and if yes, a programmable logic controller (PLC) controls the loading oil cylinder to perform unloading; whether the real-time forming load is zero or not is determined by the PLC according to data which are fed back by a pressure sensor of the loading oil cylinder in the unloading process, and if yes, the PLC determines actual measurement deformation of the members at the moment, the segmental lengths of the members during continuous forming and the moving distance of the members after forming each time; a servo motor of a main driving wheel is controlled to work, the members move forwards from the back of the forming assembly jig, and therefore the members are continuously segmented, pushed to be bent and formed. Linkage control over loading, deformation measurement and feeding can be achieved.

Description

technical field [0001] The invention relates to the technical field of mechanical equipment, in particular to secondary cold-bending forming equipment for large-diameter steel pipes or large-size steel components. The formed products are mainly used in the fields of building steel structures and pipeline engineering. The diameter or maximum size of the section can exceed 1500mm. Background technique [0002] Arc members of large-size steel pipes and section steel are widely used in the field of construction steel structures and pipeline engineering. Such members are mainly formed by cold bending, and the cold bending process adopted is segmental continuous forming. Before the member is bent, it needs to go through a lot of trial bending to determine the forming load, and then according to the existing experience, the member is divided into several segments with a fixed segment length as the unit, and each segment is bent to the predetermined Then move the unformed segment t...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems existing in the existing forming equipment, to provide a horizontal CNC cold bending machine for large-scale components and its CNC cold bending method, which adopts a horizontal layout during forming, and introduces component clamping molds, displacement measuring devices and The feeding device realizes the linkage control of forming actions such as forming loading, component deformation measurement and component movement, and improves the forming accuracy of products

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