CN101927578A - Servo electro-hydraulic composite pressure method and press thereof - Google Patents

Abstract

The invention discloses a servo electro-hydraulic composite pressure method, which comprises the following steps: 1) arranging a frame; 2) an upper hydraulic device is arranged on the frame; 3) a closed-loop servo electro-hydraulic control system is arranged and is connected with the upper hydraulic device and controls the working state of the upper hydraulic device; it also discloses a press for implementing the method; the method provided by the invention adopts a servo electro-hydraulic technology to replace the traditional hydraulic control technology, is simple to manufacture, high in efficiency, low in energy consumption and high in control precision, the position control precision can reach 0.01-0.02 mm, the functions of pressing, stretching, demolding, general cutting and the like can be realized at the same time, and the method has quite high processing flexibility; the press provided by the invention has the advantages of reasonable structure, small volume, stable work, high performance, low noise and wide application range, integrates the advantages of a mechanical press, a hydraulic press and numerical control, and has the advantages of multiple functions, low cost, large pressure tonnage and the like.

Description

Servo-electro-hydraulic composite pressure method and its press

technical field

The invention belongs to the field of presses, and in particular relates to a servo electro-hydraulic composite pressure method and a press.

Background technique

Hydraulic machinery is more and more widely used in practical applications, which involves all walks of life, such as hardware, clocks, glasses, electronics, automobile manufacturing, jewelry, printing, rubber, furniture, construction, powder metallurgy and other manufacturing industries. Stretching, embossing, molding, electronic component pressing, furniture bending, embossing, powder metallurgy parts production, rubber vulcanization, construction machinery, etc. are all applied to hydraulic technology, which is inseparable in our life. Hydraulic technology has very good characteristics and advantages that cannot be replaced by other technologies. Hydraulic technology plays a very important role in national scientific research and is an indispensable driving force for my country's economic progress.

However, in the existing hydraulic machinery, due to its traditional structural design, it is bulky and heavy, and the manufacturing cost is high; and its own control is limited by the characteristics of the drive motor and oil pump, so it inevitably inherits the traditional hydraulic power control. Disadvantages, such as low control precision, low efficiency and high energy consumption, and it is widely applicable, and the function is monotonous, and functions such as pressing, stretching, demoulding, and president cannot be realized at the same time; in addition, there are large heat generation, poor stability, and loud noise, etc. question.

Contents of the invention

In view of the above-mentioned deficiencies, one of the purposes of the present invention is to provide a servo-electro-hydraulic composite pressure method with simple manufacture, high control precision, high performance, high efficiency and multiple functions;

The object of the present invention is also to provide a press machine with reasonable structure, small volume, reliable operation, high efficiency, multiple functions and wide application range.

To achieve the above object, the technical solution provided by the present invention is:

A servo electro-hydraulic composite pressure method, comprising the following steps:

(1) A frame is provided, and the frame includes a support part and an upper convex part symmetrically arranged on the top of the support part, and a lower convex part at the bottom, wherein the upper convex part and the lower convex part protrude to the same side, and the whole The outline is in a "]" shape, and a workbench is provided on the upper surface of the protruding part of the lower convex part;

(2) An upper hydraulic device is arranged on the protruding part of the upper convex part of the frame, and the upper hydraulic device faces the workbench for providing downward pressure or upward pulling force;

(3) A closed-loop servo electro-hydraulic control system is provided, and the closed-loop servo electro-hydraulic control system is connected with the upper hydraulic device and controls its working state.

Described step (2), it specifically comprises the following steps:

(21) A plunger type hydraulic cylinder is provided to generate downward pressure or upward pulling force;

(22) A mounting frame is provided for fixing the plunger type hydraulic cylinder on the upper convex portion of the frame;

(23) An upper press seat is provided for clamping the mould, and the upper press seat is fixed on the piston rod of the plunger type hydraulic cylinder;

(24) Four guide columns are set to guide the upward or downward movement track of the upper pressure seat, these guide columns are symmetrically arranged on the periphery of the upper pressure seat, and correspond to each guide column in the installation Each frame is provided with a corresponding guide hole;

(25) When installing, fix the upper pressure seat on the piston rod of the plunger hydraulic cylinder, and make the guide post on the upper pressure seat extend into the corresponding guide hole, and can follow the The piston of the plunger hydraulic cylinder slides up and down correspondingly due to the telescopic action.

Described step (3), it specifically comprises the following steps:

(31) A hydraulic supply unit is provided for driving fluid to generate hydraulic pressure; the hydraulic supply unit includes a servo valve, a constant pump, a pressure sensor, a servo motor, a rotary encoder and a servo driver; the The servo driver is used to control the working state of the servo motor; the servo motor is used to drive the quantitative pump; the quantitative pump is used to drive the fluid to flow in the pipeline; the rotary encoder is used to monitor the rotation speed of the servo motor and the flow rate of the fluid Flow rate, and feed back the corresponding speed information and flow information; the servo valve is used to monitor the flow of fluid in the pipeline; the pressure sensor is used to detect the pressure of the plunger hydraulic cylinder, and feed back pressure information;

(32) A position detection device is provided to detect the position of the upper press seat and feed back the corresponding position coordinate information; A pull rod, the shape of which is an "L" shape, the upper end of which is connected to the magnetic scale, and the lower end is fixed on the upper pressure seat of the upper hydraulic device;

(33) A programmable controller is provided for receiving and processing the information fed back by the hydraulic supply unit and the position detection device, and correspondingly controlling the working state of the hydraulic supply unit according to preset technical parameter requirements;

(34) Composing a closed-loop servo electro-hydraulic control system: the servo driver drives the servo motor to drive the quantitative pump to output hydraulic pressure, and the rotary encoder monitors the rotational speed of the servo motor and the flow rate of the fluid to form a feedback source to form the first closed-loop control; The pressure sensor detects the pressure of the plunger hydraulic cylinder, and feeds back the pressure information to the servo driver to form a second closed-loop control; the servo valve monitors the flow of fluid flowing out of or into the plunger hydraulic cylinder, Form the third closed-loop control; the servo valve controls the plunger hydraulic cylinder to drive the upper pressure seat to move downward or upward, which is detected by the position detection device, and its position coordinate information is fed back to the programmable controller to form a fourth Closed-loop control.

It also includes the steps of:

(4) a protection device that is connected with the closed-loop servo electro-hydraulic control system to realize emergency shutdown or safety alarm is provided; the protection device is made up of a light emitter, a light receiver and a controller; the light emitter is composed of Composed of several light-emitting units, used to emit infrared rays, these light-emitting units are arranged on a strip-shaped support rod A in sequence, and the strip-shaped support rod A is vertically arranged on the front end side of the workbench; the light-receiving unit The device is composed of several light-receiving units for receiving infrared rays, and these light-receiving units are sequentially arranged on a strip-shaped support rod B, and the strip-shaped support rod B is vertically arranged on the other side of the front end of the workbench, And corresponding to the light emitter, a protective light curtain is formed to generate light-through and light-shielding signals, which are transmitted to the controller through the signal cable; the controller supplies power to the light-emitting device and the light receiver, and processes the light-through, The shading signal generates a control signal and transmits it to the closed-loop servo electro-hydraulic control system.

(5) A lower hydraulic device connected to the closed-loop servo electro-hydraulic control system is provided at the bottom of the protruding part of the lower convex part, which is used to eject the mold or workpiece on the workbench; the lower hydraulic device The device includes a top seat, a fixed frame and a plunger hydraulic cylinder, the plunger hydraulic cylinder is fixed on the frame through the fixed frame, and the top seat is fixed on the piston of the plunger hydraulic cylinder on the rod, and correspondingly the top seat is placed on the workbench to be provided with an opening for it to protrude;

(6) Set up a control panel for pre-inputting relevant technical parameter requirements and real-time monitoring of the working status of the closed-loop servo electro-hydraulic control system;

(7) An operating console is set up to realize manual control of the working state of the closed-loop servo electro-hydraulic control system;

(8) Turn on the power supply, initialize the closed-loop servo electro-hydraulic control system, input the required relevant technical parameters through the control panel, and select the automatic mode or manual mode; The above-mentioned hydraulic supply unit drives the upper hydraulic device to realize the corresponding stamping action; after the stamping action is completed, the lower hydraulic device automatically ejects the workpiece or mold on the workbench; The programming controller issues a starting command to realize the corresponding stamping action. After the stamping action is completed, the operating platform is manually operated to start the lower hydraulic device to eject the workpiece or mold on the working platform;

The steps (4), (5), (6) and (7) are in no sequence, and the step (8) is repeated to realize the continuous cycle stamping action.

A press for implementing the above-mentioned servo-electro-hydraulic composite pressure method, which includes a frame, and also includes an upper hydraulic device and a closed-loop servo-electro-hydraulic control system that is connected to the upper hydraulic device and controls its working state. The frame includes a support part, an upper convex part symmetrically arranged on the top of the support part, and a lower convex part at the bottom, wherein the upper convex part and the lower convex part protrude to the same side, and the overall outline is a "]" shape A workbench is provided on the upper surface of the protruding part of the lower convex part, and the upper hydraulic device is arranged on the protruding part of the upper convex part and faces the workbench.

The upper hydraulic device includes an upper pressure seat, a mounting frame and a plunger type hydraulic cylinder, and the plunger type hydraulic cylinder is fixed on the upper convex part of the frame through the mounting frame, and makes the piston The rod faces the workbench, the upper press seat is arranged on the piston rod, and at least one guide post is provided on it, the installation frame is provided with a guide hole matching the guide post, and the guide post Stretch into this guide hole, and can slide up and down.

The bottom of the lower convex portion of the frame is provided with a lower hydraulic device connected to and controlled by the closed-loop servo electro-hydraulic control system. The lower hydraulic device includes a top seat, a fixed frame and a plunger type A hydraulic cylinder, the plunger hydraulic cylinder is fixed on the frame through the fixing frame, the top seat is fixed on the piston rod of the plunger hydraulic cylinder, and the top seat is placed on the workbench correspondingly An opening is provided to allow it to protrude.

The closed-loop servo electro-hydraulic control system includes a programmable controller, a hydraulic supply unit connected to the programmable controller, a position detection device, an operating table, and a control panel, and the control panel is arranged on the upper protrusion of the frame. The operating table is arranged at the middle position of the front end surface of the workbench, and the position detecting device is arranged at the supporting part side of the frame.

The hydraulic supply unit includes a servo valve, a fixed volume pump, a servo motor and a servo driver, the servo driver is connected to the servo motor, the drive shaft of the servo motor is connected to the quantitative pump, and the pipeline of the quantitative pump The servo valve is respectively connected to the upper hydraulic device and the lower hydraulic device, and a pressure sensor is provided on the pipeline, and the pressure sensor is connected to the servo driver. A rotary encoder for monitoring its rotational speed and the flow rate of the fluid in the pipeline, the rotary encoder is connected with the programmable controller.

The position detection device includes a magnetic scale and a pull rod that adopts 40Cr quenching and tempering heat treatment and is plated with hard chrome on the surface. The upper pressure seat of the upper hydraulic device is connected.

It also includes a protection device connected to the closed-loop servo electro-hydraulic control system, the protection device includes a controller and a light emitter and a light receiver respectively connected to the controller, the light emitter includes a strip A And a number of light-emitting units arranged on the strip-shaped pole A and arranged in sequence along its long side direction, the strip-shaped pole A is vertically arranged on the front end side of the workbench; the light receiver includes a strip-shaped pole The rod B and several light-receiving units arranged on the strip-shaped pole B and arranged in sequence along the long side direction, the strip-shaped pole B is vertically arranged on the other side of the front end of the workbench.

The beneficial effects of the present invention are: the method provided by the present invention adopts the servo electro-hydraulic technology to replace the traditional hydraulic control technology, which is simple in manufacture, high in efficiency, low in energy consumption, high in control accuracy, and the position control accuracy can reach 0.01-0.02 mm, and can simultaneously Realize functions such as pressing, stretching, demoulding, president, etc., and have quite high processing flexibility; the press provided by the invention has reasonable structure, small volume, stable operation, high performance, low noise, and wide application range. The advantages of hydraulic press and numerical control are integrated, and it has the advantages of multiple functions, low cost and large pressure tonnage. The overall outline of the frame is in the shape of a "]", the overall structure is ingeniously designed, and the structure is strong, which is conducive to improving stability and is small in size and low in manufacturing cost; the closed-loop servo electro-hydraulic control system is controlled by four closed loops to achieve position, pressure , Speed and high-precision control, and make the output power change with the load change, no overflow energy consumption, almost in a shutdown state during pressure holding and standby, power consumption is close to 0, there is no waste of excess energy, and no cooling system is required. The energy-saving parameters can be automatically set according to different products, models and working methods. Compared with traditional hydraulic presses and mechanical punching presses, it can save 20%-80% of electricity consumption, and the economic benefits are significant; the use of servo motors greatly improves the response of presses Compared with the traditional asynchronous motor, the response speed is significantly faster, and the pressurization speed is faster, which effectively shortens the working cycle and improves production efficiency; it is equipped with a position detection device to effectively ensure the stability of product quality and reduce the defective rate. The pull rod adopts 40Cr quenching and tempering heat treatment, and the surface treatment is hard chrome plating. Good strength, small force deformation, make the machine more precise, higher safety factor, more anti-fatigue, anti-alternating load, anti-wear, prolong the service life of the machine. Adopting plunger type hydraulic cylinder and combining with the overall structure, the response speed is fast, and it can be pressurized quickly. Its pressing speed can reach more than 400 mm/s, and its pressing effect is better than that of ordinary mechanical punching machines. It can be widely used in hardware products or The suppression of non-metallic products not only improves production efficiency, but also protects product quality. In addition, the operation is more stable and smooth, and the maintenance is easy and the cost is lower. It is equipped with an operation table, which is convenient for manual operation and meets individual needs.

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Description of drawings

Fig. 1 is a side view structural representation of the present invention;

Fig. 2 is a front view structural schematic diagram of the present invention;

Fig. 3 is a schematic diagram of a three-dimensional structure of the present invention;

Fig. 4 is a schematic block diagram of the structure of the present invention.

Detailed ways

Embodiment: Referring to Fig. 1 to Fig. 4, this embodiment provides a servo-electro-hydraulic composite pressure method, which includes the following steps:

(1) A frame 1 is set, and the frame 1 includes a support portion 11 and an upper convex portion 12 symmetrically arranged on the top of the support portion 11, and a lower convex portion 13 at the bottom, wherein the upper convex portion 12 and the lower convex portion 13 protrudes to the same side, and the overall outline is a "]" shape, the overall structure is ingeniously designed, the structure is strong, it is beneficial to improve stability, the volume is small, and the manufacturing cost is low; the protruding part of the lower convex part 13 A workbench 14 is provided on the upper surface;

(2) An upper hydraulic device 2 is arranged on the protruding position of the upper convex part 12 of the frame 1, and the upper hydraulic device 2 faces the direction of the workbench 14 to provide downward pressure or upward pressure. pulling force;

Described step (2), it specifically comprises the following steps:

(21) A plunger-type hydraulic cylinder 21 is set to generate downward pressure or upward pulling force; the plunger-type hydraulic cylinder 21 is adopted to move quickly, improve production efficiency, make the movement more stable and smooth, and be easy to maintain, and The cost is lower.

(22) A mounting frame 22 is provided for fixing the plunger type hydraulic cylinder 21 on the upper convex portion 12 of the frame 1;

(23) An upper press seat 23 is provided for clamping the mould, and the upper press seat 23 is fixed on the piston rod of the plunger type hydraulic cylinder 21;

(24) Four guide posts 24 are set to guide the upward or downward movement track of the upper press seat 23, these guide posts 24 are symmetrically arranged on the periphery of the upper press seat 23, and correspond to each guide post 24. Each of the mounting brackets 22 is provided with a corresponding guide hole;

(25) During installation, the upper pressing seat 23 is fixed on the piston rod of the plunger type hydraulic cylinder 21, and the guide post 24 on the upper pressing seat 23 is stretched into the corresponding guide hole, and The piston of the plunger hydraulic cylinder 21 can slide up and down accordingly.

(3) A closed-loop servo electro-hydraulic control system is provided, and the closed-loop servo electro-hydraulic control system is connected with the upper hydraulic device 2 and controls its working state.

Described step (3), it specifically comprises the following steps:

(31) A hydraulic supply unit is provided for driving fluid to generate hydraulic pressure; the hydraulic supply unit includes a servo valve, a constant pump, a pressure sensor, a servo motor, a rotary encoder and a servo driver; the The servo driver is used to control the working state of the servo motor; the servo motor is used to drive the quantitative pump; the quantitative pump is used to drive the fluid to flow in the pipeline; the rotary encoder is used to monitor the rotation speed of the servo motor and the flow rate of the fluid flow rate, and feed back corresponding speed information and flow information; the servo valve is used to monitor the flow of fluid in the pipeline; the pressure sensor is used to detect the pressure of the plunger hydraulic cylinder 21, and feed back pressure information;

(32) A position detection device 3 is provided to detect the position of the upper press seat 23, and feed back the corresponding position coordinate information; A pull rod 32 plated with hard chrome, whose profile is an "L" shape, its upper end is connected to the magnetic scale 31, and its lower end is fixed on the upper pressure seat 23 of the upper hydraulic device 2; the pull rod 32 adopts 40Cr quenching and tempering heat treatment, hard chrome plating surface treatment. Good strength, small force deformation, make the machine more precise, higher safety factor, more anti-fatigue, anti-alternating load, anti-wear, prolong the service life of the machine.

(33) A programmable controller is provided for receiving and processing the information fed back by the hydraulic supply unit and the position detection device 3, and correspondingly controlling the working state of the hydraulic supply unit according to preset technical parameter requirements;

(34) Composing a closed-loop servo electro-hydraulic control system: the servo driver drives the servo motor to drive the quantitative pump to output hydraulic pressure, and the rotary encoder monitors the rotational speed of the servo motor and the flow rate of the fluid to form a feedback source to form the first closed-loop control; The pressure sensor detects the pressure of the plunger hydraulic cylinder 21, and feeds back the pressure information to the servo drive to form a second closed-loop control; the servo valve monitors the flow of fluid flowing out of or into the plunger hydraulic cylinder 21. The flow rate forms the third closed-loop control; the servo valve controls the plunger hydraulic cylinder 21 to drive the upper pressure seat 23 to move downward or upward, which is detected by the position detection device 3, and its position coordinate information is fed back to the programmable control device, forming a fourth closed-loop control. With four closed-loop controls, it achieves high-precision control of position, pressure, and speed, and makes the output power vary with load changes, without overflow energy consumption. It is almost in a shutdown state during pressure maintaining and standby, and the power consumption is close to 0. There is a waste of excess energy and no cooling system is required. Energy-saving parameters can be automatically set according to different products, models and working methods. Compared with traditional hydraulic presses and mechanical punch presses, it can save 20%-80% of electricity consumption, and the economic benefits are significant;

(4) set one and link to each other with described closed-loop servo electro-hydraulic control system, be used for realizing the protection device 4 of emergency shutdown or safety alarm, guarantee the safety of operator; A controller; the light emitter 41 is composed of several light-emitting units for emitting infrared light, and these light-emitting units are sequentially arranged on a strip-shaped pole A, and the strip-shaped pole A is vertically arranged on the The front end side of the workbench 14; the photoreceiver 42 is made up of several photoreceiving units for receiving infrared light, and these photoreceiving units are arranged on the strip B in turn, and the strip B is vertical It is arranged on the other side of the front end of the workbench 14 and corresponds to the light emitter 41 to form a protective light curtain to generate light-through and light-shield signals, which are transmitted to the controller through a signal cable; The device 41 and the light receiver 42 supply power, and process the light-passing and light-shielding signals generated by the light receiver 42 to generate control signals and transmit them to the closed-loop servo electro-hydraulic control system.

(5) A lower hydraulic device 5 connected to the closed-loop servo electro-hydraulic control system is provided at the bottom of the protruding part of the lower convex part 13, and is used for ejecting the mold or workpiece on the workbench 14; The lower hydraulic device 5 includes a top seat 51, a fixed frame 52 and a plunger type hydraulic cylinder 53, the plunger type hydraulic cylinder 53 is fixed on the frame through the fixed frame 52, and the top seat 51 It is fixed on the piston rod of the plunger hydraulic cylinder 53, and an opening is provided on the workbench 14 corresponding to the position of the top seat 51 to allow it to protrude;

(6) A control panel 6 is set, which is used for inputting relevant technical parameter requirements in advance and monitoring the working state of the closed-loop servo electro-hydraulic control system in real time;

(7) An operation console 7 is provided to realize manual control of the working state of the closed-loop servo electro-hydraulic control system and meet individual requirements;

(8) Turn on the power supply, initialize the closed-loop servo electro-hydraulic control system, input the required relevant technical parameters through the control panel 6, and select the automatic mode or manual mode; The hydraulic supply unit drives the upper hydraulic device 2 to realize the corresponding stamping action; after the stamping action is completed, the lower hydraulic device 5 automatically ejects the workpiece or mold on the workbench 14; when the manual mode is selected, the manual operation is performed. The console 7 enables the programming controller to issue a starting command to realize the corresponding stamping action. After the stamping action is completed, the console 7 is manually operated to start the lower hydraulic device 5 to eject the workpiece or mold on the table 14. ;

The steps (4), (5), (6) and (7) are in no sequence, and the step (8) is repeated to realize the continuous cycle stamping action.

A press for implementing the above-mentioned servo electro-hydraulic composite pressure method, which includes a frame 1, which also includes an upper hydraulic device 2 and a closed-loop servo electro-hydraulic control that is connected to the upper hydraulic device 2 and controls its working state system, the frame 1 includes a support portion 11, an upper convex portion 12 symmetrically arranged on the top of the support portion 11, and a lower convex portion 13 at the bottom, wherein the upper convex portion 12 and the lower convex portion 13 protrude to the same side , the overall outline is a "]" shape, a workbench 14 is provided on the upper surface of the protruding part of the lower convex part 13, and the upper hydraulic device 2 is set on the protruding part of the upper convex part 12. and facing the workbench 14.

The upper hydraulic device 2 includes an upper pressure seat 23, a mounting frame 22 and a plunger type hydraulic cylinder 21, and the plunger type hydraulic cylinder 21 is fixed on the upper protrusion of the frame 1 through the mounting frame 22. part 12, and make its piston rod towards the workbench 14, the upper press seat 23 is arranged on the piston rod, and at least one guide column 24 is arranged on it, and the mounting frame 22 is provided with the The guide hole that the guide post 24 is adapted to, the guide post 24 extends into the guide hole, and can slide up and down.

The bottom of the lower convex part 13 of the frame 1 is provided with a lower hydraulic device 5 which is connected with the closed-loop servo electro-hydraulic control system and controlled by it. The lower hydraulic device 5 includes a top seat 51 and a fixed frame. 52 and a plunger type hydraulic cylinder 53, the plunger type hydraulic cylinder 53 is fixed on the frame 1 through the fixed frame 52, and the top seat 51 is fixed on the piston rod of the plunger type hydraulic cylinder 53, And corresponding to the position of the top seat 51, an opening for it to protrude is provided on the workbench 14 .

The closed-loop servo electro-hydraulic control system includes a programmable controller and a hydraulic supply unit connected to the programmable controller, a position detection device 3, an operating table 7, and a control panel 6, and the control panel 6 is arranged on the machine. On one side of the upper convex part 12 of the frame 1, the operating platform 7 is arranged in the middle of the front end of the workbench 14, which is convenient for manual operation and meets individual needs; the position detection device 3 is arranged on the frame 1 side of the support part 11.

The hydraulic supply unit includes a servo valve, a fixed volume pump, a servo motor and a servo driver, the servo driver is connected to the servo motor, the drive shaft of the servo motor is connected to the quantitative pump, and the pipeline of the quantitative pump The servo valve is respectively connected to the upper hydraulic device 2 and the lower hydraulic device 5, and a pressure sensor is provided on the pipeline, and the pressure sensor is connected to the servo drive, and a pressure sensor is provided on the servo motor. A rotary encoder used to monitor its rotational speed and the flow rate of the fluid in the pipeline, and the rotary encoder is connected with the programmable controller. The servo motor is used to greatly improve the response time of the press. Compared with the traditional asynchronous motor, the response speed is significantly faster, the pressurization speed is faster, the working cycle is effectively shortened, and the production efficiency is improved; the position detection device 3 is equipped to effectively ensure the stability of product quality. and reduce the defect rate.

The position detection device 3 includes a magnetic scale 31 and a pull rod 32 that adopts 40Cr quenching and tempering heat treatment and is plated with hard chrome on the surface. , the lower end is connected with the upper press seat 23 of the upper hydraulic device 2 . It also includes a protection device 4 connected to the closed-loop servo electro-hydraulic control system to effectively protect the safety of the operator. When a human hand enters the range of the workbench 14, it will automatically alarm or emergency stop, which is highly safe. The protection device 4 comprises a controller and a light emitter 41 and a light receiver 42 which are respectively connected to the controller. The light emitter 41 comprises a strip pole A and a number of strip poles A are arranged, and along its long side The light-emitting units arranged in sequence in the direction, the strip-shaped pole A is vertically arranged on the front end side of the workbench 14; the light receiver 42 includes a strip-shaped pole B and several are arranged on the strip-shaped pole B, and The light receiving units are arranged in sequence along the long side direction, and the strip-shaped support rod B is vertically arranged on the other side of the front end of the workbench 14 .

When working, set relevant technical parameters through the control panel 6 in advance, such as requirements such as speed and pressure process, and select automatic mode or manual mode; 14 Clamp the corresponding lower die or directly place the workpiece to be stamped; when the automatic mode is selected, the programmable controller will automatically issue a control command, and the hydraulic supply unit will drive the upper hydraulic device 2 to realize the corresponding stamping action; after the stamping action is completed , the lower hydraulic device 5 automatically ejects the stamped workpiece or the lower mold on the workbench 14, which is convenient for repositioning the stamped workpiece or changing the mold; The device issues a starting command to realize the corresponding stamping action. After the stamping action is completed, the console 7 is manually operated to start the lower hydraulic device 5 to push out the stamped or lower mold on the workbench 14, which is convenient for re-pressing. Place workpieces to be stamped or replace molds to meet different functional uses and individual needs. Servo electro-hydraulic technology is used to replace traditional hydraulic control technology. It has reasonable structure, simple manufacture, small size, stable work and high efficiency. It can simultaneously realize functions such as pressing, stretching, demoulding, and president. It has high processing flexibility and consumes less energy. Less power, less noise, high control accuracy, position control accuracy can reach 0.01-0.02 mm, it combines the advantages of mechanical punch press, hydraulic punch press and numerical control, and has the advantages of multiple functions, low cost and large pressure tonnage.

As described in the above embodiments of the present invention, other pressing methods and presses obtained by adopting the same or similar technical features are within the protection scope of the present invention.

Claims (10)

1. servo electrohydraulic composite pressure method is characterized in that it may further comprise the steps:

(1) frame is set, this frame comprises a support portion and is symmetricly set on the upper convex portion at the top of this support portion, the following protuberance of bottom, wherein upper convex portion and following protuberance protrude to the same side, the monnolithic case profile is one "] " shape, the upper surface in the position that described protuberance is down protruded is provided with a workbench;

(2) on the position that the upper convex portion of described frame is protruded hydraulic means on is set, hydraulic means is used to provide downward pressure or the pulling force that makes progress towards the direction of described workbench on this;

(3) a closed loop servo electrohydraulic control system is set, this closed loop servo electrohydraulic control system links to each other with the described hydraulic means of going up, and controls its duty.

2. servo electrohydraulic composite pressure method according to claim 1 is characterized in that, described step (2), and it specifically comprises the steps:

(21) plunger-type cylinder is set, is used for producing downward pressure or the pulling force that makes progress;

(22) installing rack is set, is used for described plunger-type cylinder is fixed on the upper convex portion of described frame;

(23) upper pressure seat is set, is used for the clamping mould, this upper pressure seat is fixed on the piston rod of described plunger-type cylinder;

(24) four leads are set, the movement locus up or down of the described upper pressure seat that is used for leading, those leads are symmetricly set on the periphery of described upper pressure seat, and corresponding each lead respectively is provided with a guide hole suitable with it on described installing rack;

When (25) installing, described upper pressure seat is fixed on the piston rod of described plunger-type cylinder, and makes the lead on this upper pressure seat stretch into guide hole corresponding, and can correspondingly slide up and down with the piston expanding-contracting action of described plunger-type cylinder with it.

3. servo electrohydraulic composite pressure method according to claim 2 is characterized in that, described step (3), and it specifically comprises the steps:

(31) hydraulic pressure supply unit is set, is used for drive fluid, to produce hydraulic pressure; Described hydraulic pressure supply unit comprises a servo valve, a certain amount of pump, a pressure sensor, a servo motor, a rotary encoder and a servo-driver; Described servo-driver is used for controlling the duty of servo motor; Described servo motor is used for driving constant displacement pump; The drive fluid that is used for described constant displacement pump flows in pipeline; Described rotary encoder is used for monitoring the rotating speed of servo motor and the flow of fluid, and feedback corresponding rotating speeds information and flow information; Described servo valve is used for the flow of fluid in the monitored pipeline; Described pressure sensor is used for detecting the pressure of plunger-type cylinder, and the feedback pressure information;

(32) position detecting device is set, is used for detecting the position of described upper pressure seat, and the corresponding location coordinate information of feedback; This position detecting device comprises that a magnetic railings ruler and adopts the pull bar of the modified heat treatment of 40Cr, plating hard chromium on surface, and this pull bar appearance profile is one " L " shape, and its upper end is connected with described magnetic railings ruler, and the lower end is fixed on the upper pressure seat of described upward hydraulic means;

(33) Programmable Logic Controller is set, is used for receiving, handling the information of described hydraulic pressure supply unit and the feedback of position detecting device institute, and require the duty of corresponding this hydraulic pressure supply unit of control according to the technical parameter that sets in advance;

(34) form the closed loop servo electrohydraulic control system: described servo driver drives servo motor drives constant displacement pump output hydraulic pressure, by the rotating speed of described rotary encoder monitoring servo motor and the flow of fluid, forms the feedback source and constitutes first closed-loop control; Described pressure sensor detects the pressure size of plunger-type cylinder, and this pressure information of feedback constitutes second closed-loop control to described servo-driver; The flow of the fluid of described plunger-type cylinder is flowed out or enters in described servo valve monitoring, forms the 3rd closed-loop control; Described servo valve control plunger-type cylinder drives upper pressure seat and moves downward or upward, is detected by described position detecting device, and its location coordinate information is fed back to Programmable Logic Controller, forms the 4th closed-loop control.

3, servo electrohydraulic composite pressure method according to claim 1 is characterized in that, it also comprises the steps:

(4) be provided with one and link to each other, be used for realizing the protective device of emergency shutdown or security alarm with described closed loop servo electrohydraulic control system; This protective device is made up of a photophore, a light-receiving device and a controller; Described photophore is made up of plurality of luminescence units, is used for launching IR, those luminescence units is successively set on the strip pole A, and this strip pole A is vertically set on described front end one side of stating workbench; Described light-receiving device is made up of some light receiving units, be used for receiving IR, those light receiving units are successively set on the strip pole B, and this strip pole B is vertically set on the described front end opposite side of stating workbench, and it is corresponding with described photophore, form protection light curtain, produce logical light, shielding signals, be transferred to controller by signal cable; Described controller is photophore, light-receiving device power supply, and handles logical light, the shielding signals that light-receiving device produces, and produces control signal, and is transferred to described closed loop servo electrohydraulic control system.

(5) be provided with a following hydraulic means that is connected with described closed loop servo electrohydraulic control system in the bottom at the position that described protuberance is down protruded, be used for workpiece on the workbench or mould are ejected; This time hydraulic means comprises a footstock, a fixed mount and a plunger-type cylinder, this plunger-type cylinder is fixed on the described frame by described fixed mount, described footstock is fixed on the piston rod of this plunger-type cylinder, and to being provided with an opening that allows it stretch out in described workbench in the footstock position;

(6) control panel is set, is used for being provided with the duty of technical parameter requirement and real-time monitoring closed loop servo electrohydraulic control system;

(7) operating desk is set, realizes the manually duty of control closed loop servo electrohydraulic control system;

(8) connect power supply, the initialization of closed loop servo electrohydraulic control system is imported required correlation technique parameter by control panel, and automatic mode or manual mode are established in choosing; When being elected to automatic mode, Programmable Logic Controller sends control instruction automatically, goes up hydraulic means by described hydraulic pressure supply unit driving and realizes corresponding punching press action; After the punching press action finished, following hydraulic means ejected workpiece on the workbench or mould automatically; When being elected to manual mode, then, make programmable controller send enabled instruction by the described operating desk of people's hand operated, realize corresponding punching press action, after the punching press action finishes,, start described hydraulic means down workpiece on the workbench or mould are ejected again by this operating desk of people's hand operated;

Described step (4), (5), (6), (7) no sequencing, repeating step (8) is realized continuous circulation punching press action.

4. forcing press of implementing the described servo electrohydraulic composite pressure method of claim 1, it comprises a frame, it is characterized in that, it also comprises on one hydraulic means and links to each other with hydraulic means on this, and control the closed loop servo electrohydraulic control system of its duty, described frame comprises a support portion and is symmetricly set on the upper convex portion at the top of this support portion, the following protuberance of bottom, wherein upper convex portion and following protuberance protrude to the same side, the monnolithic case profile is one "] " shape, upper surface in the position that described protuberance is down protruded is provided with a workbench, the described hydraulic means of going up is arranged on the position that described upper convex portion protrudes, and towards described workbench.

5. forcing press according to claim 4, it is characterized in that, the described hydraulic means of going up comprises a upper pressure seat, an installing rack and a plunger-type cylinder, this plunger-type cylinder is fixed on the upper convex portion of described frame by described installing rack, and make its piston rod towards described workbench, described upper pressure seat is arranged on this piston rod, and on this its, be provided with a lead at least, described installing rack is provided with the guide hole suitable with this lead, described lead stretches into this guide hole, and can slide up and down.

6. forcing press according to claim 4, it is characterized in that, the bottom of the following protuberance of described frame is provided with one and is connected with described closed loop servo electrohydraulic control system and is subjected to the following hydraulic means of its control, this time hydraulic means comprises a footstock, a fixed mount and a plunger-type cylinder, this plunger-type cylinder is fixed on the described frame by described fixed mount, described footstock is fixed on the piston rod of plunger-type cylinder, and to being provided with an opening that allows it stretch out in described workbench in the footstock position.

7. forcing press according to claim 6, it is characterized in that, described closed loop servo electrohydraulic control system comprises a Programmable Logic Controller and the hydraulic pressure supply unit, position detecting device, operating desk, the control panel that link to each other with this Programmable Logic Controller respectively, this control panel is arranged on upper convex portion one side of described frame, described operating desk is arranged on the centre position of the front end face of described workbench, and described position detecting device is arranged on support portion one side of described frame.

8. forcing press according to claim 7, it is characterized in that, described hydraulic pressure supply unit comprises a servo valve, a certain amount of pump, one servo motor and a servo-driver, this servo-driver links to each other with described servo motor, the driving shaft of described servo motor is connected with constant displacement pump, the pipeline of this constant displacement pump by described servo valve respectively with the described hydraulic means of going up, following hydraulic means links to each other, and be provided with a pressure sensor in its pipeline, this pressure sensor links to each other with described servo-driver, one rotary encoder that is used for monitoring the flow of fluid in its rotating speed and the described pipeline is set on described servo motor, and this rotary encoder links to each other with described Programmable Logic Controller.

9. forcing press according to claim 7, it is characterized in that, described position detecting device comprises that a magnetic railings ruler and adopts the pull bar of the modified heat treatment of 40Cr, plating hard chromium on surface, this pull bar appearance profile is one " L " shape, its upper end is connected with described magnetic railings ruler, and the lower end is connected with the described upper pressure seat of going up hydraulic means.

10. forcing press according to claim 4, it is characterized in that, it also comprises a protective device that is connected with described closed loop servo electrohydraulic control system, this protective device comprises a controller and the photophore and the light-receiving device that link to each other with this controller respectively, described photophore comprises a strip pole A and some the setting on this strip pole A, and the luminescence unit that is arranged in order along its long side direction, described strip pole A is vertically set on front end one side of described workbench; Described light-receiving device comprises a strip pole B and some the setting on this strip pole B, and the light receiving unit that is arranged in order along its long side direction, and described strip pole B is vertically set on the front end opposite side of described workbench.

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