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Electro-hydraulic mix-drive pipe bender

A technology of electro-hydraulic mixing and pipe bending machine, which is applied in the field of hydraulic drive, can solve the problems of high cost and complex structure, and achieve the effects of convenient operation, high control precision and simple structure

Active Publication Date: 2018-10-16
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is complex and expensive

Method used

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  • Electro-hydraulic mix-drive pipe bender
  • Electro-hydraulic mix-drive pipe bender
  • Electro-hydraulic mix-drive pipe bender

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Such as figure 1 As shown, an electro-hydraulic hybrid driven pipe bender includes a pushing cylinder 3, a waist drum roller 32, an induction coil 31, a rocker arm 30, a clamping motor 5 and a second hydraulic drive circuit 2.

[0050] Such as figure 2 and 6 As shown, the pushing cylinder is an electro-hydraulic mechanical cylinder, and the electro-hydraulic mechanical cylinder includes: the first variable pump / motor 8, the first servo motor 9, the first transmission pair 7 and the first lead screw 6, the first servo The output end of the motor is connected in series with the input end of the first variable pump / motor, the output shaft of the first variable pump / motor is mechanically connected with the first transmission pair, and the first lead screw is mechanically connected with the first transmission pair.

[0051] Such as Figure 6 As shown, the second hydraulic drive circuit includes: power source 19, main hydraulic pump 18, first filter 17, oil tank 16, first...

Embodiment 2

[0054] Such as figure 1 As shown, an electro-hydraulic hybrid driven pipe bender includes a pushing cylinder 3, a waist drum roller 32, an induction coil 31, a rocker arm 30, a clamping motor 5 and a first hydraulic drive circuit 1.

[0055] Such as image 3 and 7 As shown, the pushing cylinder is a hydraulic mechanical cylinder, and the hydraulic mechanical cylinder includes: the second variable pump / motor 12, the second transmission pair 11 and the second lead screw 10, the output end of the second variable pump / motor and the second The input end of the transmission pair II is connected in series, and the second lead screw and the second transmission pair are mechanically connected.

[0056] Such as Figure 7 As shown, the first hydraulic drive circuit includes: power source 19, main hydraulic pump 18, first filter 17, oil tank 16, first relief valve 20, first one-way valve 21, second relief valve 23. Pressure switch valve 22, II accumulator 25, III overflow valve 26, II...

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Abstract

The invention discloses a pipe bender with constant pressure hydraulic circuit system. An existing pushing hydraulic cylinder is replaced by an electro-hydraulic mechanical cylinder or a hydraulic mechanical cylinder; a constant pressure network based on secondary regulation is adopted by a hydraulic circuit, a pushing cylinder and a clamping device are connected between a high-pressure oil passage and a low-pressure oil passage in parallel, and control over the pushing cylinder and the clamping device is achieved through displacement of a variable displacement motor. An existing mechanical structure of the pipe bender does not need to be changed, only the hydraulic circuit needs to be changed, the hydraulic cylinder needs to be replaced, thus, the control precision and the operation efficiency can be improved, and resources are saved.

Description

technical field [0001] The invention relates to the technical field of hydraulic drive, in particular to an electro-hydraulic hybrid drive pipe bender. Background technique [0002] The requirements of the hydraulic system for the hydraulic pipe bending machine are that the idle travel and return speed of the actuator must be fast, and the propulsion speed must be slow and stable. The traditional hydraulic system mainly adjusts the speed of the hydraulic cylinder by controlling the hydraulic valve, and then drives the actuator to complete the corresponding action, which has a large throttling loss. In addition, if the hydraulic valve-controlled cylinder wants to obtain higher control accuracy and multi-level working speed, it will inevitably increase the complexity of the control system. [0003] The Chinese invention patent with the application number CN202239111U discloses "a dual-power-driven numerical control pipe bending machine". The power drive device of this pipe b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D7/025
CPCB21D7/025
Inventor 权龙葛磊孟科张旭飞李泽鹏王鹤
Owner TAIYUAN UNIV OF TECH
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