Cold-bending processing equipment and method of steel pipe

Abstract

The invention relates to cold-bending processing equipment and method of a steel pipe. The cold-bending processing equipment comprises an operation platform and is characterized in that a mould backup plate is vertically arranged on the operation platform, reinforcing plates are uniformly distributed on the back part of the mould backup plate, a circular arc-shaped mould is fixed on the front part of the mould backup plate through uniformly distributed reinforcing pull ribs, the concave surface on the circular arc-shaped mould is outwards arranged in the direction parallel to the operation platform, and the concave surface is the cross section of the circular arc-shaped mould; and at least three hydraulic oil cylinders are arranged in a position which corresponds to the position of the concave surface on the operation platform, and the front end of a hydraulic push rod is also fixedly provided with a push rod arc-shaped mould, wherein a concave-surface lamp on the push rod arc-shaped mould horizontally corresponds to the concave surface of the circular arc-shaped mould. A straight pipe is processed into a bent pipe by adopting the steps of mould fabrication and operation. The cold-bending processing equipment has the advantages of simple structure, convenient operation and low cost, ensures that the bent steel pie is out of round in the range of the specified quality requirement, reduces the production cost, and ensures the mechanical strength of raw materials.

Description

Technical field [0001] The invention relates to the technical field of steel structure processing, in particular to a cold bending processing equipment and method for steel pipes in a truss building structure. Background technique [0002] With the continuous development and progress of the steel structure industry, the aesthetic and diversified architectural steel structure design will be popularized. Among them, the tube truss building has a unique shape and beautiful appearance, and has been widely used in the construction of large-span structures. Because the manufacturing process of the tube truss is relatively complicated, especially the arc-shaped tube truss is an indispensable production process in the production of the upper and lower chords, and it is also a relatively complicated processing process. At present, the traditional arc bending process of steel pipe mainly includes the following mechanical cold bending method and high frequency heating bending method. [0003...

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Problems solved by technology

[0003] Mechanical cold bending method: Mechanical stretch bending or top bending is used, but the diameter and wall thickness of the pipe and the required bending radius have certain limitations in the traditional cold bending method, that is, when the diameter of the steel pipe is greater than 300 mm, When the radius of the arc is less than 5 meters, the quality of the arc cannot be controlled by the above-mentioned cold bending method, and only the high-frequency heating bending method can be used

[0004] High-frequency heating bending method: mainly the steel pipe is bent after high-frequency heating. First, the processing cost is high; Applications are limited

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