Pipe bending equipment and bent pipe machining method for inhibiting bent pipe from becoming elliptic

Abstract

The invention discloses pipe bending equipment and a bent pipe machining method for inhibiting a bent pipe from becoming elliptic. The pipe bending equipment comprises a guide seat and a plurality of movable joint pressing blocks, the guide seat is installed on a rack, the movable joint pressing blocks are distributed side by side and installed on the guide seat in a sliding mode, and semicircular grooves are formed in the right end faces of the movable joint pressing blocks. The semicircular grooves in the movable joint pressing blocks are matched to form a first semicircular groove. Before pipe bending operation is carried out, the first semicircular groove is linear and can be attached to the outer side wall of the linear part of the guide pipe. According to the technical scheme, when pipe bending operation is carried out, part of the movable joint pressing block can slide out of the guide seat, the first semi-circular groove can be bent along with the guide pipe, and then the first semi-circular groove can be attached to the outer side wall of the bent part of the guide pipe. The outer side wall of the bent part of the guide pipe is sufficiently supported, furthermore, the ellipticity of the bent part of the guide pipe is further reduced, and the outer side wall of the bent part of the guide pipe can be effectively prevented from being stretched and fractured.

Description

technical field [0001] The invention relates to the technical field of pipe material processing, in particular to a pipe bending device and a pipe bending processing method for suppressing the ellipse of the bent pipe. Background technique [0002] Aircraft and rocket tubes are responsible for important tasks such as fuel input, mechanism opening, pressure control, and environmental regulation during preparation. Failure or damage to any part may lead to "plane crash" and rocket "arrow destruction". Death" is a major tragedy, and it is directly related to the life safety of officers, soldiers and passengers. [0003] There are many metal hollow tube components on airplanes and rockets, commonly known as "ducts". The conduits are mainly used to transmit various liquids and gases, to support the fuel and power required for the flight of airplanes and rockets, and to complete various tasks. The rocket is a very important part. Due to the hollow structure of the duct, and the ...

AI Technical Summary

Problems solved by technology

Due to the limitation of the installation environment of aircraft and rockets, the shape of the catheter is complicated to bend. Many catheter bending parts have a small bending radius, which leads to serious deformation during the bending process, and it is extremely easy to become an ellipse, or even become unstable and wrinkled. This is a common technology in the catheter bending processing industry. problem, which has not yet been completely resolved

[0004] In the early stage of the aircraft and rocket start-up stage in China, due to the weak manufacturing base, manual methods such as filling fine sand and rosin in the hollow tube were used to ensure the roundness of the bending process. Quantitative development needs. Therefore, with the development of industrialization, hydraulic pipe benders and CNC pipe benders are gradually used to bend and process pipes. In the bending process, due to the influence of the structural characteristics of the process equipment, the bending part of the pipe is always in the bending process. It is in a semi-closed state. Under such bending conditions, there is no protection during the bending process of the catheter, and it is easy to aggravate the deformation at the bending part, reducing the roundness of the catheter bending to an ellipse (there are common technical problems in this industry all over the world), due to the lack of sufficient constraints , which also aggravates the technical defects of buckling and wrinkling in the bending process of the bent pipe, affects the quality of aircraft and rocket products, and reduces the reliability and safety of aircraft and rockets

[0005] With the development of pipe bending technology, in the process of high-precision pipe bending, the mandrel is often used to support the inner wall of the catheter, thereby reducing the ellipticity of the curved part of the catheter and effectively avoiding wrinkles on the inner wall of the catheter And damage; but for the outer wall of the catheter, due to lack of sufficient support, there is still a certain degree of ellipticity and a certain risk of being stretched and broken

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