阅读说明：本技术 锻造液压机的多工位工作台定位控制系统及控制方法 (Multi-station workbench positioning control system and control method of hydraulic forging press ) 是由 计鑫 解勇 张建民 于 2020-05-20 设计创作，主要内容包括：本发明涉及一种锻造液压机的多工位工作台定位控制系统及控制方法,包括位置传感器,用于采集工作台移动位置数据；左侧压力传感器,用于采集左侧工作台压强数据；右侧压力传感器,用于采集右侧工作台压强数据；主泵电机,用于为工作台提供移动的动力；泵出口电磁溢流阀,用于控制主油路的油液流向；高频响应方向阀,用于控制工作台移动的方向和工作台的移动速度；左侧比例溢流阀,用于控制左侧推动缸压力控制,同时为工作台右移提供背压；右侧比例溢流阀,用于控制右侧推动缸压力控制,同时为工作台左移提供背压；PLC,用于接收检测数据,并输出控制指令。本发明实现上料、镦粗、冲孔、落料、终冲、下料位等多工位工作台的精准定位控制。(The invention relates to a multi-station workbench positioning control system and a multi-station workbench positioning control method of a forging hydraulic press, which comprise a position sensor, a positioning sensor and a positioning control module, wherein the position sensor is used for acquiring moving position data of a workbench; the left side pressure sensor is used for acquiring pressure data of the left side workbench; the right side pressure sensor is used for acquiring pressure data of the right side workbench; the main pump motor is used for providing moving power for the workbench; the pump outlet electromagnetic overflow valve is used for controlling the oil flow direction of the main oil way; the high-frequency response directional valve is used for controlling the moving direction of the workbench and the moving speed of the workbench; the left proportional overflow valve is used for controlling the pressure control of the left pushing cylinder and providing back pressure for the right movement of the workbench; the right proportional overflow valve is used for controlling the pressure control of the right pushing cylinder and providing back pressure for the left movement of the workbench; and the PLC is used for receiving the detection data and outputting a control command. The invention realizes the accurate positioning control of the multi-station working table for feeding, upsetting, punching, blanking, final punching, blanking, and the like.)

1. The utility model provides a multistation workstation positioning control system of hydraulic forging press which characterized in that includes at least:

the position sensor is used for acquiring the moving position data of the workbench;

the left side pressure sensor is used for acquiring pressure data of the left side workbench;

the right side pressure sensor is used for acquiring pressure data of the right side workbench;

the main pump motor is used for providing moving power for the workbench;

the pump outlet electromagnetic overflow valve is used for controlling the oil flow direction of the main oil way;

the high-frequency response directional valve is used for controlling the moving direction of the workbench and the moving speed of the workbench;

the left proportional overflow valve is used for controlling the pressure control of the left pushing cylinder and providing back pressure for the right movement of the workbench;

the right proportional overflow valve is used for controlling the pressure control of the right pushing cylinder and providing back pressure for the left movement of the workbench;

and the PLC is used for receiving the detection data of the position sensor, the left pressure sensor and the right pressure sensor and further controlling the working states of the main pump motor, the pump outlet electromagnetic overflow valve, the high-frequency response directional valve, the left proportional overflow valve and the right proportional overflow valve by analyzing and judging the detection data.

2. The multi-station workbench positioning control system of the hydraulic forging press as claimed in claim 1, wherein the multi-stations comprise a feeding station, an upsetting station, a punching station, a blanking station, a final punching station and a blanking station.

3. A multi-station table positioning control system for a forging press according to claim 1 or 2, wherein said forging press is provided with a positioning pin device.

4. The multi-station workbench positioning control system of hydraulic forging presses of claim 3, wherein the PLC is pre-stored with a position information module, a process flow module and a PID control module of each station.

5. The multi-station table positioning control system for a hydraulic forging press of claim 4, wherein the position information module includes reference position information and error position information.

6. The multi-station table positioning control system of a hydraulic forging press as claimed in claim 4, wherein the hydraulic forging press includes an operation control knob for each process.

7. A control method of a multi-station workbench positioning control system of a hydraulic forging press based on the above claim 6 is characterized by at least comprising the following steps:

selecting a specific operation control knob according to process requirements;

step two, pressing down a 'workbench positioning' button, controlling the electromagnetic overflow valve at the outlet of a pump to suck, driving a main pump motor, giving a high-frequency response direction valve opening according to a set speed open loop, controlling a left proportional overflow valve according to a set left pressure, and controlling a right proportional overflow valve opening according to a set right pressure; when the workbench moves to a closed-loop control point LX1 or LX2 in the closed-loop control area [ -X, X ], entering a third step;

thirdly, the workbench moves into a closed-loop control area < -X, X > of the PLC, the PLC reads position data of the position sensor, and the opening of the high-frequency response directional valve is controlled in a closed-loop manner through a PID control algorithm according to comparison between a set allowable deviation ex0 and an actual deviation so as to drive the workbench to move;

and step four, the worktable moves to gradually approach the positioning position LX0, and the positioning is finished after the position sensor data is within the allowable positioning range [ -Y, Y ] for a certain time.

8. The control method of the multi-station workbench positioning control system of the hydraulic forging press according to claim 7, wherein X is 5mm, and Y is 15 mm.

9. The control method of the multi-station workbench positioning control system of the hydraulic forging press as claimed in claim 7, wherein: after the workbench is positioned, the pressure in the left side pushing cylinder and the pressure in the right side pushing cylinder are 5-6MPa, and the pressures on the two sides are unequal.

Technical Field

The invention belongs to the technical field of forging hydraulic presses, and particularly relates to a multi-station workbench positioning control system and a multi-station workbench positioning control method of a forging hydraulic press.

Background

In recent years, with the development of the fields of aerospace, nuclear power, wind power and the like in China, the demand of the hydraulic forging press is continuously increased along with the increase of ring parts required by the fields. Meanwhile, the tonnage of the hydraulic forging press is continuously increased, the process is more complex, the length of a workbench with multiple stations such as feeding, upsetting, punching, blanking, final punching, blanking and the like is also continuously increased, and the design and control method of the workbench of the traditional small-tonnage hydraulic forging press are different. Therefore, it is very important to design a novel multi-station workbench positioning control system and a control method of the hydraulic forging press.

Disclosure of Invention

The invention provides a multi-station workbench positioning control system and a multi-station workbench positioning control method of a hydraulic forging press for solving the technical problems in the prior art, and realizes the accurate positioning control of the workbench at multiple stations of feeding, upsetting, punching, blanking, final punching, blanking position and the like.

The first purpose of the invention is to provide a multi-station workbench positioning control system of a hydraulic forging press, which comprises:

the position sensor is used for acquiring the moving position data of the workbench;

the left side pressure sensor is used for acquiring pressure data of the left side workbench;

the right side pressure sensor is used for acquiring pressure data of the right side workbench;

the main pump motor is used for providing moving power for the workbench;

the pump outlet electromagnetic overflow valve is used for controlling the oil flow direction of the main oil way;

the high-frequency response directional valve is used for controlling the moving direction of the workbench and the moving speed of the workbench;

the left proportional overflow valve is used for controlling the pressure control of the left pushing cylinder and providing back pressure for the right movement of the workbench;

the right proportional overflow valve is used for controlling the pressure control of the right pushing cylinder and providing back pressure for the left movement of the workbench;

and the PLC is used for receiving the detection data of the position sensor, the left pressure sensor and the right pressure sensor and further controlling the working states of the main pump motor, the pump outlet electromagnetic overflow valve, the high-frequency response directional valve, the left proportional overflow valve and the right proportional overflow valve by analyzing and judging the detection data.

Further, the multiple stations comprise a feeding station, an upsetting station, a punching station, a blanking station, a final punching station and a blanking station.

Furthermore, the hydraulic forging press is provided with a positioning pin device.

Furthermore, a position information module, a process flow module and a PID control module of each station are prestored in the PLC.

Still further, the position information module includes reference position information and error position information.

Still further, the forging press includes an operation control knob for each process.

The second purpose of the invention is to provide a control method of a multi-station workbench positioning control system of a hydraulic forging press, which at least comprises the following steps:

selecting a specific operation control knob according to process requirements;

step two, pressing down a 'workbench positioning' button, controlling the electromagnetic overflow valve at the outlet of a pump to suck, driving a main pump motor, giving a high-frequency response direction valve opening according to a set speed open loop, controlling a left proportional overflow valve according to a set left pressure, and controlling a right proportional overflow valve opening according to a set right pressure; when the workbench moves to a closed-loop control point LX1 or LX2 in the closed-loop control area [ -X, X ], entering a third step;

thirdly, the workbench moves into a closed-loop control area < -X, X > of the PLC, the PLC reads position data of the position sensor, and the opening of the high-frequency response directional valve is controlled in a closed-loop manner through a PID control algorithm according to comparison between a set allowable deviation ex0 and an actual deviation so as to drive the workbench to move;

and step four, the worktable moves to gradually approach the positioning position LX0, and the positioning is finished after the position sensor data is within the allowable positioning range [ -Y, Y ] for a certain time.

Further, X is 5mm, and Y is 15 mm.

Further: after the workbench is positioned, the pressure in the left side pushing cylinder and the pressure in the right side pushing cylinder are 5-6MPa, and the pressures on the two sides are unequal.

The invention has the advantages and positive effects that:

by adopting the technical scheme, the positioning of the workbench is controlled in a closed loop manner, so that the positioning precision of the workbench is improved, and the mechanical abrasion between the positioning bolt and the workbench is reduced;

the pressure in the left side pushing cylinder and the right side pushing cylinder is 5-6MPa, back pressure is oppositely arranged in the moving process of the workbench, the movement inertia is reduced, the overtaking in the positioning process of the workbench is reduced, the positioning time is shortened, and the phenomenon that the workbench slides in the working process of the hydraulic press is avoided.

Drawings

FIG. 1 is a hydraulic schematic of a preferred embodiment of the present invention;

FIG. 2 is a diagram of a stage control method for positioning the stage of the workbench in accordance with a preferred embodiment of the present invention;

Detailed Description

In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings:

as shown in fig. 1 to 2, the technical solution of the present invention is:

a multi-station workbench positioning control system of a forging hydraulic press comprises:

PLC, a core control unit of a multi-station workbench positioning control system; the PLC is used for receiving the detection data of the position sensor, the left pressure sensor and the right pressure sensor and further controlling the working states of the main pump motor, the pump outlet electromagnetic overflow valve, the high-frequency response directional valve, the left proportional overflow valve and the right proportional overflow valve through analyzing and judging the detection data; a position information module, a process flow module and a PID control module of each station are prestored in the PLC; the position information module comprises reference position information and error position information;

the BQ1 is a position sensor and is used for collecting the moving position data of the workbench;

BP1, pressure sensor, used to collect left side workbench pressure data;

BP2, pressure sensor, used to collect the pressure data of the right workbench;

m1, a main pump motor for providing moving power for the workbench;

YA1, an electromagnetic overflow valve at the outlet of the pump, which is used for controlling the flow direction of the oil in the main oil way;

YAA, a high-frequency response direction valve, which is used for controlling the moving direction of the workbench and the moving speed of the workbench;

YAB, a left proportional overflow valve, which is used for controlling the pressure control of the left pushing cylinder and providing back pressure for the right movement of the workbench;

YAC, right side proportion overflow valve for control right side pushing cylinder pressure control moves left for the workstation simultaneously and provides the backpressure.

A control method of a multi-station workbench positioning control system of a hydraulic forging press comprises the following steps:

step one, a user selects a knob to one of the positions of feeding, upsetting, punching, blanking, final punching and blanking according to process requirements, such as the position of final punching.

And step two, a user presses a 'workbench positioning' button, the PLC controls YA1 to suck, the M1 main pump motor drives, the YAA opening is given through open loop according to the set speed, the YAB is controlled according to the set left pressure, and the YAC opening is controlled according to the set right pressure. When the worktable moves to the closed-loop control point LX1 or LX2 within the closed-loop control area [ -X, X ] (e.g., [ -20,20] mm, the positioning position is LX0 is 6500mm, the rightward movement starting point LX1 is 6450mm, and the rightward movement starting point LX2 is 6550mm), the next step is proceeded.

And step three, the workbench moves to a closed loop control area [ -X, X ] of the PLC, the PLC reads the BQ1 position data, and the workbench is driven to move through closed loop control of the YAA opening through a PID control algorithm according to comparison between the set allowable deviation ex0 and the actual deviation. As shown in fig. 2.

And step four, the worktable moves to gradually approach the positioning position LX0, and the positioning is completed after the BQ1 data is within the allowable positioning range [ -Y, Y ] for a certain time (for example, the allowable positioning range [ -1,1] mm, and the worktable is maintained within the range of 6499mm to 6501mm for 1s of time).

Preferably, the method comprises the following steps: the hydraulic press is provided with a positioning pin device, the plug pin positioning can be realized when the workbench operates within +/-5 mm of the station positions of the feeding position, the upsetting position, the punching position, the blanking position, the final punching position and the blanking position, the closed-loop control is adopted to control the positioning deviation of the workbench to be [ -1,1] mm, and the mechanical abrasion of the workbench and the positioning plug pin is reduced.

After the workbench is positioned, the pressure in the left side pushing cylinder and the pressure in the right side pushing cylinder are 5-6MPa and are not equal.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.