Bending method for producing metal bent pipe

Abstract

The invention discloses a bending method for producing a metal bent pipe. The bending method is characterized by comprising the following processing steps: (1) a drawing of the qualified metal bent pipe is tailored at the ratio of 1: 1; (2) the tailored drawing is bonded on a working platform; (3) one end of a metal straight pipe blank is fixed on the working platform, and the fixed end of the metal straight pipe blank is overlapped with one end of the metal bent pipe drawing on the working platform; (4) external force is applied to a free end of the metal straight pipe blank, meanwhile, the bent part of the metal straight pipe blank is acidized through use of concentrated acid, and the acidizing direction is accordant with the bending direction of the metal straight pipe blank until the bending shape of the metal straight pipe blank is overlapped with the bending shape of the drawing on the working platform, so that the metal bent pipe is obtained; and (5) the residual concentrated acid on the bent pipe is cleaned by alkali solution. The bending method needs no pipe bending machine, only adopts manual operation to finish the pipe bending process, and can conveniently and quickly bend a small amount of metal pipes.

Description

technical field [0001] The invention relates to a processing method for metal pipes, in particular to a bending method for making metal bent pipes. Background technique [0002] Various pipe bends are required in the field of mechanical processing, especially the connection parts of various parts. At present, pipe benders are mostly used for large and small batches of pipe bends. Single-piece trial production adopts tire molds, pipes are filled with water and frozen, and pipes are frozen. The method of sand filling is used to bend pipes. For single-piece production, the use of pipe benders and the above methods for pipe bending not only has high equipment costs, but also takes a long time to design pipe bending molds, which often cannot meet the production schedule and development schedule. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a metal pipe bending method, which can bend a small amount of metal pipes co...

AI Technical Summary

Problems solved by technology

[0002] Various pipe bends are required in the field of mechanical processing, especially the connection parts of various parts. At present, pipe benders are mostly used for large-scale and small-batch pipe bends. Single-piece trial production uses tire molds, pipes are filled with water and frozen, and pipes are frozen. The method of sand filling is used to bend pipes. For single-piece production, pipe bending machines and the above methods are used to bend pipes. Not only the equipment cost is high, but also the time period for designing pipe bending molds is long, which often cannot meet the production schedule and development schedule.