Processing method of small-curvature and small-angle bent pipe

Abstract

The invention discloses a processing method of a small-curvature and small-angle bent pipe, which is characterized by comprising the following steps of: firstly replacing each straight pipe-section shrimp pipe by a circular-arc section, and segmenting the processed bent pipe into straight-pipe sections; marking a projection center line a, an outer side contour line b1, an inner side contour line b2 and a port line c of each straight pipe-section shrimp pipe for assembling the bent pip by using the processed member on a steel plate platform; sequentially positioning each straight pipe-section shrimp pipe from middle to both sides by using an angle rule; finally welding the neighboring straight pipe-section shrimp pipes in the integrally positioned straight pipe-section shrimp pipes to accomplish the connection between the neighboring straight pipe-section shrimp pipes; and then polishing edges of welding lines into smooth transition. In the method, the plurality of straight pipe-section shrimp pipes replace the circular-arc sections, the assembly of the small-curvature and small-angle bent pipe is accomplished by cutting, scribing and positioning, therefore the method is simple and rapid, and the processed small-curvature and small-angle bent pipe is especially suitable for serving as a transition section at the crossed position of two small-angle steel pipes.

Description

technical field [0001] The invention relates to a processing method for a small-curvature and small-angle elbow. Background technique [0002] Such as figure 1 As shown, small-curvature and small-angle bends in steel members generally refer to pipe fittings that are made of Q345B and below, with a radius of curvature R≤500mm and an angle of ≤50°, which cannot be bent by existing pipe benders. [0003] Existing pipe bending machines can only process bends with a radius of curvature R≥1500mm, and cannot process bends with small curvatures and small angles; customization must be cast into steel castings with molten steel, but this method has a long period of time and high costs. Contents of the invention [0004] In order to avoid the shortcomings of the above-mentioned prior art, the present invention provides a method for processing bends with small curvature and small angle, so that in specific occasions, the processing of bends with a radius of curvature R≤500mm and an a...

AI Technical Summary

Problems solved by technology

[0003] Existing pipe bending machines can only process bends with a radius of curvature R≥1500mm, and cannot process bends with small curvatures and small angles; customization must be cast into steel castings with molten steel, but this method has a long cycle and high cost

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