阅读说明：本技术 一种用于折弯机的电液比例位置同步控制系统 (Electro-hydraulic proportional position synchronous control system for bending machine ) 是由 陈立娟 凌家胜 高伟 姚静 董兆胜 尹钰鑫 陈毅 鲁影影 张延康 葛杰 彭泽钦 于 2020-06-02 设计创作，主要内容包括：一种用于折弯机的电液比例位置同步控制系统,是由油箱,过滤器,定量泵,溢流阀,节流阀,中央三位四通电磁换向阀,插装阀,二位二通电磁换向阀,二位三通电磁换向阀,信号放大器,液控单向阀,单向阀,液压缸,三位四通电磁比例换向阀及各元件之间的连接管路构成,通过折弯机电液比例位置同步控制系统,实现了计算机控制折弯机的快下、慢下、工下、卸压、回程工序的同步控制,优势在于结构简单,外形体积小,操作控制精确简单,大大提高了工作的效率和消减了生产成本,通过计算机远程控制,解决了操作人员人工操作带来的安全隐患。(The utility model provides an electricity liquid proportion position synchro control system for bender, by the oil tank, the filter, the constant delivery pump, the overflow valve, the choke valve, central tribit four-way electromagnetic directional valve, the cartridge valve, two-position two-way electromagnetic directional valve, two-position three-way electromagnetic directional valve, signal amplifier, the pilot operated check valve, the pneumatic cylinder, the connecting line between three-position four-way electromagnetic proportional directional valve and each component constitutes, through bender electricity liquid proportion position synchro control system, realized the quick-down, slow-down, the worker of computer control bender, the synchronous control of release, the return stroke process, the advantage lies in simple structure, the appearance is small, the operation control is accurate simple, the efficiency of work has been improved greatly and the manufacturing cost has been subductd, through computer remote control, the potential safety hazard that operating personnel manual operation brought has been.)

1. The utility model provides an electro-hydraulic proportional position synchro control system for bender which characterized in that: the hydraulic control system comprises an oil tank (1), a filter (2), a dosing pump (3), an overflow valve (4), a throttle valve (5), a central three-position four-way electromagnetic directional valve (6), a cartridge valve (7), a two-position two-way electromagnetic directional valve (8), a first two-position three-way electromagnetic directional valve (9-1), a second two-position three-way electromagnetic directional valve (9-2), a first signal amplifier (10-1), a second signal amplifier (10-2), a third signal amplifier (10-3), a hydraulic control one-way valve (11), the overflow valve (12), a one-way valve (13), a first hydraulic cylinder (14-1), a second hydraulic cylinder (14-2), a first hydraulic control one-way valve (15-1), a second hydraulic control one-way valve (15-2), a first three-position four-way electromagnetic proportional directional valve (16-1), a second three-position four-way electromagnetic proportional directional valve (16, A first position sensor (17-1) and a second position sensor (17-2), wherein the fixed displacement pump (3) is connected with the oil tank (1) through the filter (2), the other end of the fixed displacement pump (3) is respectively connected with the overflow valve (4) and the central three-position four-way electromagnetic directional valve (6), the central three-position four-way electromagnetic directional valve (6) is respectively connected with the first three-position four-way electromagnetic proportional directional valve (16-1), the second three-position four-way electromagnetic proportional directional valve (16-2) and the cartridge valve (7), the cartridge valve (7) is connected with the two-position two-way electromagnetic directional valve (8), the first three-position four-way electromagnetic proportional directional valve (16-1) and the second three-position four-way electromagnetic proportional directional valve (16-2) are connected with each other, and the first three-position four-way electromagnetic proportional directional valve (16-1) is respectively connected with the first hydraulic cylinder (14) A rodless cavity of the first-position four-way electromagnetic proportional reversing valve (1) is connected with the first-position hydraulic one-way valve (15-1), the second-position three-way electromagnetic proportional reversing valve (16-2) is connected with the rodless cavity of the second-position hydraulic cylinder (14-2) and the second-position hydraulic one-way valve (15-2) respectively, the first-position hydraulic cylinder (14-1) and the second-position hydraulic cylinder (14-2) are connected with each other and are connected with the overflow valve (12) respectively, the one-way valve (13) is connected to one side of the overflow valve (12) in parallel, the other end of the overflow valve (12) is connected with the first-position three-way electromagnetic proportional reversing valve (16-1) and the second-position three-way electromagnetic proportional reversing valve (16-2) through the hydraulic one-position one-way valve (11), and the first-position three-way electromagnetic proportional reversing valve (16-1) is connected with the first-position operational amplifier, The second operational amplifier (10-2) is connected with the first position sensor (17-1) on the piston rod of the first hydraulic cylinder (14-1), the second three-position four-way electromagnetic proportional directional valve (16-2) is connected with the second position sensor (17-2) on the piston rod of the second hydraulic cylinder (14-2) through the third operational amplifier (10-3), the first hydraulic control one-way valve (15-1) and the second hydraulic control one-way valve (15-2) are respectively connected with the quantitative pump (3) through the second two-position three-way electromagnetic directional valve (9-2), and the hydraulic control one-way valve (11) is connected with the quantitative pump (3) through the first two-position three-way electromagnetic directional valve (9-1).

2. An electro-hydraulic proportional position synchronous control system for a bending machine according to claim 1, characterized in that: the central three-position four-way electromagnetic directional valve (6) is connected with the throttle valve (5) through a pipeline.

3. An electro-hydraulic proportional position synchronous control system for a bending machine according to claim 1, characterized in that: the first hydraulic cylinder (14-1) is connected to the upper oil tank through a first hydraulic control one-way valve (15-1); the second hydraulic cylinder (14-2) is connected to the upper oil tank through a second hydraulic control one-way valve (15-2).

4. An electro-hydraulic proportional position synchronous control system for a bending machine according to claim 1, characterized in that: the oil outlets of the first three-position four-way electromagnetic proportional reversing valve (16-1) and the second three-position four-way electromagnetic proportional reversing valve (16-2) which are connected in parallel are connected with the central three-position four-way electromagnetic reversing valve (6).

5. An electro-hydraulic proportional position synchronous control system for a bending machine according to claim 1, characterized in that: the central three-position four-way electromagnetic directional valve (6) is connected with the cartridge valve (7), and the cartridge valve (7) is connected with the two-position two-way electromagnetic directional valve (8).

Technical Field

The invention relates to an electro-hydraulic proportional position synchronous control system, in particular to an electro-hydraulic proportional position synchronous control system for a bending machine.

Background

The bending machine is a precise general device for bending and forming metal plates, and is widely applied to various fields. At present, most bending machines in China mainly adopt modes such as torsion shaft synchronous stop block positioning and machine-liquid synchronous stop block positioning to carry out synchronous control, and the defects of the bending machines are that hydraulic cylinders are slow in response, not beneficial to control, hydraulic transmission is adopted, the structure is complex, and the use and maintenance cost is high. From the effect of using, because can not adopt remote control, under some dangerous operating mode, need personnel's manual regulation, brought the potential safety hazard for operating personnel's work.

Disclosure of Invention

Technical problem to be solved

The invention provides an electro-hydraulic proportional position synchronous control system, which adopts the combination of a proportional cartridge valve and an integrated hydraulic control system and solves the problems of low precision, complex structure, high failure rate, large hydraulic impact, inconvenient maintenance, potential safety hazard caused by incapability of remote control and the like of synchronous control of a bending machine through computer control.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: an electro-hydraulic proportional position synchronous control system for a bending machine comprises an oil tank, a filter, a proportioning pump, an overflow valve, a throttle valve, a central three-position four-way electromagnetic directional valve, a cartridge valve, a two-position two-way electromagnetic directional valve, a first two-position three-way electromagnetic directional valve, a second two-position three-way electromagnetic directional valve, a first signal amplifier, a second signal amplifier, a third signal amplifier, a hydraulic control one-way valve, an overflow valve, a one-way valve, a first hydraulic cylinder, a second hydraulic cylinder, a first hydraulic control one-way valve, a second hydraulic control one-way valve, a first three-position four-way electromagnetic proportional directional valve, a second three-position four-way electromagnetic proportional directional valve, a first position sensor and a second position sensor, wherein the proportioning pump is connected with the oil tank through the filter, the other end of the proportioning pump is respectively connected with the overflow valve and the central three-position four-way electromagnetic directional valve, and the central three-position four-, The second three-position four-way electromagnetic proportional reversing valve is connected with the cartridge valve, the cartridge valve is connected with the two-position two-way electromagnetic reversing valve, the first three-position four-way electromagnetic proportional reversing valve is connected with the second three-position four-way electromagnetic proportional reversing valve, the first three-position four-way electromagnetic proportional reversing valve is respectively connected with the rodless cavity of the first hydraulic cylinder and the first hydraulic control one-way valve, the second three-position four-way electromagnetic proportional reversing valve is respectively connected with the rodless cavity of the second hydraulic cylinder and the second hydraulic control one-way valve, the first hydraulic cylinder and the second hydraulic cylinder are connected with each other and are respectively connected with the overflow valve, one side of the overflow valve is connected with the one-way valve in parallel, and the other end of the overflow valve is respectively connected with the first three-position four-way electromagnetic proportional reversing valve and the second three-position four-way electromagnetic proportional reversing valve through the hydraulic control one, no. one tribit four-way electromagnetic proportional directional valve passes through a fortune is put, No. two fortune put with on the pneumatic cylinder piston rod a position sensor links to each other, No. two tribit four-way electromagnetic proportional directional valve pass through No. three fortune put with No. two position sensor on the pneumatic cylinder piston rod two links to each other, a liquid accuse check valve with No. two liquid accuse check valve passes through respectively No. two three-way electromagnetic directional valve with the constant delivery pump is connected, the liquid accuse check valve pass through No. one two three-way electromagnetic directional valve with the constant delivery pump is connected.

Furthermore, the central three-position four-way electromagnetic directional valve is connected with the throttle valve through a pipeline.

Furthermore, the first hydraulic cylinder is connected to the upper oil tank through a first hydraulic control one-way valve; the second hydraulic cylinder is connected to the upper oil tank through a second hydraulic control one-way valve.

Furthermore, the oil outlets of the first three-position four-way electromagnetic proportional reversing valve and the second three-position four-way electromagnetic proportional reversing valve which are connected in parallel are connected with the central three-position four-way electromagnetic reversing valve.

Furthermore, the central three-position four-way electromagnetic directional valve is connected with the cartridge valve, and the cartridge valve is connected with the two-position two-way electromagnetic directional valve.

(III) advantageous effects

The invention provides an electro-hydraulic proportional position synchronous control system for a bending machine, which has the advantages of simple structure, small appearance volume, accurate and simple operation control, greatly improved working efficiency and reduced production cost. Through computer remote control, the potential safety hazard brought by manual operation of operators is solved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a diagram of a bender station operation;

FIG. 2 is a schematic structural view of the present invention;

in the drawings, the components represented by the respective reference numerals are listed below:

the hydraulic control system comprises an oil tank 1, a filter 2, a dosing pump 3, an overflow valve 4, a throttle valve 5, a central three-position four-way electromagnetic directional valve 6, a cartridge valve 7, a two-position two-way electromagnetic directional valve 8, a first two-position three-way electromagnetic directional valve 9-1, a second two-position three-way electromagnetic directional valve 9-2, a first signal amplifier 10-1, a second signal amplifier 10-2, a third signal amplifier 10-3, a hydraulic control one-way valve 11, an overflow valve 12, a one-way valve 13, a first hydraulic cylinder 14-1, a second hydraulic cylinder 14-2, a first hydraulic control one-way valve 15-1, a second hydraulic control one-way valve 15-2, a first three-position four-way electromagnetic proportional directional valve 16-1, a second three-position four-way electromagnetic proportional directional valve 16-2, a first position sensor 17-1 and a second position sensor.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, the bending machine utilizes fluid transmission to drive the double-cylinder driving slide block to move up and down, and the working conditions are as follows: fast descending, slow descending, working descending, pressure maintaining, pressure relief and return stroke.

Referring to fig. 2, the electro-hydraulic proportional position synchronous control system of the bending machine is composed of an oil tank 1, a filter 2, a constant delivery pump 3, an overflow valve 4, a throttle valve 5, a central three-position four-way electromagnetic directional valve 6, a cartridge valve 7, a two-position two-way electromagnetic directional valve 8, a first two-position three-way electromagnetic directional valve 9-1, a second two-position three-way electromagnetic directional valve 9-2, a signal amplifier 10, a hydraulic control one-way valve 11, an overflow valve 12, a one-way valve 13, a first hydraulic cylinder 14-1, a second hydraulic cylinder 14-2, a first hydraulic control one-way valve 15-1, a second hydraulic control one-way valve 15-2, a first three-position four-way electromagnetic proportional directional valve 16-1, a second three-position four-way electromagnetic proportional directional valve 16-2.

The electro-hydraulic proportional position synchronous control system of the invention adopts a computer to control the bending machine to carry out the execution operations of fast descending, slow descending, working descending, pressure maintaining, pressure relief, return stroke and the like. The working process is as follows: and in the fast descending stage, a fast descending loop is formed by the first two-position three-way electromagnetic directional valve 9-1, the second two-position three-way electromagnetic directional valve 9-2, the second two-position two-way electromagnetic directional valve 8, the hydraulic control one-way valve 11, the first hydraulic control one-way valve 15-1, the second hydraulic control one-way valve 15-2, the first hydraulic cylinder 14-1, the second hydraulic cylinder 14-2 and connected pipelines thereof. The central three-position four-way electromagnetic directional valve 6 is electrified at the left position, the first three-position four-way electromagnetic proportional directional valve 16-1 is electrified at the left position, the second three-position four-way electromagnetic proportional directional valve 16-2 is electrified at the left position, the first two-position three-way electromagnetic directional valve 9-1 is electrified, the second two-position three-way electromagnetic directional valve 9-2 is not electrified, and the second two-position two-way electromagnetic directional valve 8 is electrified, so that the hydraulic rod can drive the sliding block to rapidly descend, when the hydraulic rod runs to a designated position, the rapid descending stage is switched to the slow descending stage, and the cartridge valve 7, the two-position two-way electromagnetic directional valve 8 and a pipeline thereof form a slow. In the working stage, the left position of the central three-position four-way electromagnetic directional valve 6 is kept electrified, the left position of the first three-position four-way electromagnetic proportional directional valve 16-1 is kept electrified, the left position of the second three-position four-way electromagnetic proportional directional valve 16-2 is kept electrified, the first two-position three-way electromagnetic directional valve 9-1 is electrified, the second two-position three-way electromagnetic directional valve 9-2 is also electrified, and the second two-position two-way electromagnetic directional valve 8 is not electrified. Pressure maintaining is needed to be carried out in the bending process due to the influence of elastic deformation of materials, in the pressure maintaining stage, the central three-position four-way electromagnetic directional valve 6 is powered off, the first three-position four-way proportional electromagnetic directional valve 16-1 is powered off, the second three-position four-way electromagnetic proportional directional valve 16-2 is powered off, the first two-position three-way electromagnetic directional valve 9-1 is not powered on, the second two-position three-way electromagnetic directional valve 9-2 is powered on, the second two-position two-way electromagnetic directional valve 8 is powered off, and at the moment, the loop is in the pressure maintaining state. The fixed displacement pump and the overflow valve 4 form an unloading loop. And in the return stage after the pressure maintaining is finished, the right position of the central three-position four-way electromagnetic directional valve 6 is kept electrified, the right position of the first three-position four-way electromagnetic proportional directional valve 16-1 is kept electrified, the right position of the second three-position four-way electromagnetic proportional directional valve 16-2 is kept electrified, the two-position two-way electromagnetic directional valve 8 is electrified, the first two-position three-way electromagnetic directional valve 9-1 is not electrified, and the second two-position three-way electromagnetic directional valve 9-2 is electrified. The above processes realize the effect of controlling the quick-falling, slow-falling, working, pressure maintaining, pressure relief and return procedures of the bending machine by the computer.