Numerical control cutting process of steel tube arch bridge pipe joint steel plate intersecting line

Abstract

The invention relates to a numerical control cutting process of a steel tube arch bridge pipe joint steel plate intersecting line. The numerical control cutting process comprises a numerical control flame cutting machine and comprises the following steps that (1) a curve graph of the steel tube arch bridge pipe joint steel plate intersecting line is drawn through a geometric method and led into the numerical control flame cutting machine; (2) an angle turning device is installed at the numerical control flame cutting machine, and steering cutting of the numerical control flame cutting machine in four directions can be realized through the angle turning device; and (3) curve cutting of a required process groove containing welding is carried out on a steel plate so as to obtain parts which meet a requirement on an arch rib abutting joint curve. The numerical control cutting process has the advantages that firstly, the steel plate is formed by adopting numerical control cutting for one time, so that a production organization is smoother; secondly, raw materials are saved; thirdly, operating time that a welder carries out the welding is reduced; fourthly, a welded joint is uniform and attractive in appearance, fifthly, an integrated one-time cutting process is adopted, a working procedure is less, a cutting surface and a line are smooth and continuous, and quality is high, sixthly, the quality of a cut curve and a flame cutting surface are both improved, seventhly, the operating time that the welder carries out the welding is reduced, eighthly, production efficiency is high, and ninthly, working efficiency is improved.

Description

technical field [0001] The invention belongs to the manufacture of bridge engineering steel structures, relates to a numerical control cutting process method for steel plates in the manufacturing process of arch rib pipe joints of steel pipe arch bridges, and belongs to the field of numerical control cutting. Background technique [0002] There are two commonly used methods for making the arch rib curve of steel pipe arch bridges: one is to make the straight pipe joints butt to the required length, and then deform it through hot simmering to meet the curve requirements. In the production, special equipment is required to use infrared ceramic electric heating technology The other is to divide the pipe joint into about two meters according to the design requirements and the corresponding process formulated by the manufacturing unit for steel plate blanking, circle making, cutting intersecting lines, assembly and other processes, so as to realize the requirements of the arch rib...

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Problems solved by technology

[0003] Design purpose: to avoid the deficiencies in the background technology, to provide a steel pipe arch bridge pipe section steel plate intersecting line numerical control cutting process, to solve the steel pipe arch bridge arch rib curve quality problem and pipe joint processing quality in the existing process, to improve work efficiency, and to provide Lay the foundation for improving the automation level of steel pipe arch bridge manufacturing

This application aims at the problems of low cutting precision, rough cutting surface, and unsmooth curve transition in the original process of "substituting bending instead of bending", and adopts a new process to cut the curve of the steel plate once, that is, to ensure the curve of the arch rib The requirements of intersecting lines can also meet the requirements of welding process grooves

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