Top pulling device in pipe bender

Abstract

The invention discloses a pushing device in a pipe bending machine, which can cause the pipe bending machine to bend short pipes; the pushing device comprises a pushing pipe, an oil cylinder base and a dual-outlet type pushing oil cylinder which is arranged on the oil cylinder base; a piston of the pushing oil cylinder and piston rods which are arranged at the left side and the right side of the piston are provided with perforated operation holes; the end part of the piston rod at the left side is provided with the pushing pipe; the internal hole of the pushing pipe is communicated with the operation hole; the end part of the piston rod at the right side is provided with a position limit nut by a thread; the oil cylinder base is movably arranged on a sliding plate which is movably arranged on a rack; the rack is provided with a positioning tooth; the side part of one side of the positioning tooth is embedded in the positioning concave trough of the sliding plate. A pushing connecting pipe with a hollow structure is also arranged between the pushing pipe and the piston rod. The pipe bending machine installed with the pushing device of the invention can be used for processing the short pipes, especially for the short pipes with the bending radius which is equal to or less than 1.5 times of the external diameter of the pipe.

Description

technical field [0001] The invention relates to a pipe bending machine, in particular to a pushing device in the pipe bending machine. Background technique [0002] As we all know, when the pipe bender bends small-radius pipes, it needs to use a pushing device, such as figure 1 As shown, its structure usually includes: a push cylinder 1 arranged on a push seat 2 and a double-outlet grab cylinder 3, and one end of the piston rod 4 of the grab cylinder 3 is provided with a tapered grip claw die 5. The other end of the piston rod 4 of the material grabbing cylinder 3 is set together with the piston rod of the jacking oil cylinder 1, and one side of the material grabbing cylinder 3 is also provided with a taper sleeve 6 matched with the material grabbing claw mold 5. When bending the pipe, the material grabbing cylinder 3 moves first, so that the cylinder body of the material grabbing cylinder 3 moves backward with the taper sleeve 6, so that the grabbing claw mold 5 is clamped...

AI Technical Summary

Problems solved by technology

When the grabbing claw die 5 in this push device grabs the pipe, the length of the pipe is required not to be too short, because the pipe is too tube, and the grabbing claw die 5 will touch the pipe bending die when bending the pipe, and the pipe cannot be bent. conduct

Therefore, the current pipe bending machine cannot process short pipes, that is, short pipes with a short rear end, especially short pipes with a bending radius ≤ 1.5 times the outer diameter of the pipe.

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