Oil circuit system of main oil cylinder of tube bending machine

Abstract

The invention discloses an oil circuit system of a main oil cylinder of a tube bending machine. The oil circuit system comprises the main oil cylinder; the main oil cylinder comprises a cylinder barrel, a first piston and a second piston; the first piston and the second piston are slidably arranged in the cylinder barrel and are connected with each other through a connecting rod; and the first piston approaches the head of the main oil cylinder and is connected with a piston rod which extends out of the main oil cylinder. The oil circuit system also comprises a first contraction force application pipeline, a second contraction force application pipeline, an extension force application pipeline, an oil pump and a three-position four-way electromagnetic valve, wherein the first contraction force application pipeline is communicated with a cavity between the first piston and the second piston; the second contraction force application pipeline is communicated with a cavity between the first piston and the head of the cylinder barrel; the extension force application pipeline is communicated with the cavity between the first piston and the second piston; the oil pump is communicated with an oil supply port of the three-position four-way electromagnetic valve; both the first contraction force application pipeline and the second contraction force application pipeline are communicated with a contraction force application port of the three-position four-way electromagnetic valve; the extension force application pipeline is communicated with an extension force application port of the three-position four-way electromagnetic valve; and an overflow port of the three-position four-way electromagnetic valve is communicated with an overflow barrel. The oil circuit system of the main oil cylinder can meet requirements on tube bending force of the large tube bending machine with the oil cylinder, and is fast in bending speed, so that production efficiency is improved.

Description

technical field [0001] The invention relates to an oil circuit system, in particular to an oil circuit system for a main oil cylinder of a pipe bending machine. Background technique [0002] Generally, large-scale hydraulic pipe bending machines require a large bending force, so the supporting main oil cylinder is large in size to meet the bending force, which makes the volume of the whole machine appear bloated and large, and the bending speed is slow, which restricts the entire machine production efficiency. Contents of the invention [0003] The technical problem to be solved by the present invention is: to provide a main oil cylinder oil circuit system of a pipe bender, which can meet the bending force of a large oil cylinder pipe bender, and at the same time, push the bending speed fast, thereby improving production efficiency . [0004] In order to solve the above technical problems, the technical solution of the present invention is: a pipe bending machine main oi...

AI Technical Summary

Problems solved by technology

[0002] Generally, large-scale hydraulic pipe bending machines require a large bending force, so the supporting main cylinder must be large to meet the bending force, which makes the volume of the whole machine appear bloated and large, and the bending speed is slow, which restricts the entire machine production efficiency

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