Tube bending machine

Abstract

The invention relates to a tube bending machine. The tube bending machine comprises a rack, wherein a loading mechanism capable of outputting front-and-back linear displacement actions is arranged on the rack, a prop-bending die is in transmission connection with a power output end of the loading mechanism, two support wheels matched with the prop-bending die to bend corresponding metal tubes are also rotationally arranged on the rack, metal tube limiting mechanisms are arranged in positions, which are located on left and right sides of each support wheel, of the rack, each metal tube limiting mechanism is provided with a limiting channel which extends linearly and laterally and is penetrated through by the corresponding end of each metal tube, and the limiting channels are located on back sides of the corresponding support wheels respectively and provided with channel walls which are in stop fit with the corresponding ends of the metal tubes in the front-and-back direction and in sliding friction guide fit with the corresponding ends of the metal tubes bilaterally when the prop-bending die and the support wheels prop and press the metal tubes. The tube bending machine is not required to be manually held by an operator during usage and can bend R angles.

Description

technical field [0001] The invention relates to a pipe bending machine. Background technique [0002] The bending and forming of metal pipes occupies an important position in various mechanical fields. For example, a lot of U-shaped bends are needed in the manufacture of gas path connection of high-voltage electrical equipment. During the installation and operation of high-voltage electrical equipment, U-shaped bends Used to compensate for pipe size changes caused by installation, thermal expansion and contraction, and operational vibration. Existing pipe benders such as the "new hydraulic pipe bender" disclosed in Chinese patent document CN201046475Y, this pipe bender includes a frame on which a hydraulic cylinder capable of outputting linear movements in the front and rear directions is housed, and the piston rod of the hydraulic cylinder is equipped with a For the top bending die, the frame is also rotatably provided with two support wheels whose rotation axes extend in ...

AI Technical Summary

Problems solved by technology

The problem with the existing pipe bending machine is that when the metal pipe is bent, due to the lack of a structure for limiting the two ends of the metal pipe, it is necessary to first clamp the metal pipe in the groove of the top bending die, and then The operator manually supports the two ends of the metal pipe so that the metal pipe moves forward together with the top bending die. In this process, manpower is wasted, and the two ends of the metal pipe are tilted to the rear side during the bending process, and it is easy to injure the operator; in addition, because the metal pipe will touch the two supporting wheels after moving forward with the top bending die for a certain distance, At this time, the metal pipe has a certain initial velocity, that is, the metal pipe will produce a certain amount of impact on the support wheel, which reduces the service life of the support wheel; in addition, the existing pipe bender can only bend "V "shaped tube or "U" shaped tube, and "V" shaped tube or "U" shaped tube that cannot be bent out of the R angle

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