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Pipe bends are steel control products formed by a complete set of bending molds, which are divided into two categories according to the process: cold simmering and hot pushing, mainly used in oil transmission, gas transmission, infusion pipelines and bridges and other engineering fields, and the main production area is Mengcun, Cangzhou City, Hebei Province. Its production needs to control the bending radius, wall thickness change and other parameters, the rotary bending method can optimize the forming of thin-walled pipes, the production parameters of cold-bent pipes need to be determined by test and in line with the "Technical Specifications for Cold-bent Pipes of the Second Line of West-to-East Gas Transmission Pipeline Engineering", and the hot-boiled bending pipes adopt the sand filling heating process but the efficiency is low.
Pipe bending machines are divided into CNC type and hydraulic type, the materials cover carbon steel, stainless steel and other materials, and the bending radius is graded according to the long radius (1.5D) and short radius (1.0D).
our country has independently developed large-diameter hot-boiled pipe bending and pipe fittings processing equipment, and built an automatic pipe bending anti-corrosion operation line to achieve mechanized construction.
The cold bending pipe needs to be detected by the anti-corrosion layer one by one, and the pipe mouth is protected by a pipe cap and marked with production information.
The optimal parameters of the thin-walled pipe push bending process were determined by orthogonal experiments, and the error of forming quality was controlled within 4.5% in combination with finite element model analysis.
YSSPipeBend software supports pipe bending feature recognition, NC code generation and processing simulation, and is compatible with mainstream pipe bending machine tools
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