CN101927578B - Servo electrohydraulic composite pressure method and press machine thereof - Google Patents
Servo electrohydraulic composite pressure method and press machine thereof Download PDFInfo
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- CN101927578B CN101927578B CN201010260933.6A CN201010260933A CN101927578B CN 101927578 B CN101927578 B CN 101927578B CN 201010260933 A CN201010260933 A CN 201010260933A CN 101927578 B CN101927578 B CN 101927578B
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Abstract
The invention discloses a servo electrohydraulic composite pressure method, comprising the following steps: 1) arranging a stander; 2) arranging an upper hydraulic device on the stander, 3) arranging a closed ring servo electrohydraulic control system, wherein the closed ring servo electrohydraulic control system is connected with the upper hydraulic device, and controls the work situation of the upper hydraulic device; the invention further discloses a press machine which implements the method; the method provided by the invention uses a servo electrohydraulic technology to replace the traditional electrohydraulic control technology, which has simple manufacturing, high efficiency, little power consumption and high control precision; the position control precision can reach to 0.01 to 0.02 millimeters; the pressing, the tensioning, the de-molding, the full deciding and other functions can be realized simultaneously, so the method has a comparatively high processing flexibility; the press machine provided by the invention is rational in structure, little in volume, stable in work, high in capacity, little in noise, and wide in application range. The advantages of a mechanical punching machine, a hydraulic punching machine and a numerical control are integrated, so the press machine has the advantages of multi-function, low cost, large pressure tonnage, etc.
Description
Technical field
The invention belongs to the forcing press field, be specifically related to a kind of servo electrohydraulic composite pressure method and forcing press thereof.
Background technology
Hydraulic machinery is more and more wider in actual applications, it relates to all trades and professions, control the manufacturings such as gold as five metals, clock and watch, glasses, electronics, automobile making, jewellery, printing, rubber, furniture, building, powder, have that material during tensile, impression, moulding, electronic component press-fit, furniture Qu Mu, embossing, powder control metal parts and make, the vulcanization of rubber, engineering machinery etc. are applied to hydraulic technique, must be inseparable in our life.It is that other technology is irreplaceable that hydraulic technique has very good characteristic advantage.Hydraulic technique has the indispensable power of considerable status ，Shi China economic progress in national scientific research.
But in existing hydraulic machinery, due to its traditional structural design, cause bulkyly and heavy, manufacturing cost is high; And itself controls the characteristic that is limited to drive motors and oil pump, thereby inevitably inherited the shortcoming that the traditional oils pressure power is controlled, and as low as control accuracy, efficiency low and energy consumption is large, and widely applicable little, the function dullness can not realize the functions such as compacting, stretching, the demoulding, president simultaneously; The problem such as also have in addition that caloric value is large, poor stability, noise are large.
Summary of the invention
For above-mentioned deficiency, one of the object of the invention is, provides that a kind of manufacture is simple, high control precision, high-performance, high efficiency and multi-functional servo electrohydraulic composite pressure method;
The object of the invention also is, provide a kind of rational in infrastructure, volume is little, reliable operation, efficiency is high and function is many, forcing press applied widely.
For achieving the above object, technical scheme provided by the present invention is:
A kind of servo electrohydraulic composite pressure method, it comprises the following 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 lower protuberance of bottom, wherein upper convex portion and lower protuberance protrude to the same side, the monnolithic case profile is one "] " shape, the upper surface at the position of protruding in described lower protuberance is provided with a workbench;
(2) hydraulic means on is set on the position of protruding in the upper convex portion of described frame, and on this, hydraulic means, towards described workbench, is used to provide downward pressure or the pulling force made progress;
(3) a closed loop servo electrohydraulic control system is set, this closed loop servo electrohydraulic control system is connected with described upper hydraulic means, and controls its duty.
Described step (2), it specifically comprises the steps:
(21) plunger-type cylinder is set, is used for producing downward pressure or the pulling force made 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 clamping mold, 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;
(25), while 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 thereto, and can correspondingly slide up and down with the piston expanding-contracting action of described plunger-type cylinder.
Described step (3), 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 the corresponding rotary speed information of feedback and flow information; Described servo valve is used for the flow of fluid in 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 lower end is fixed on the upper pressure seat of described upper hydraulic means;
(33) Programmable Logic Controller is set, is used for receiving, processing 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 set in advance;
(34) form the closed loop servo electrohydraulic control system: described servo driver drives servo motor drives the 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 forms the first closed-loop control; Described pressure sensor detects the pressure size of plunger-type cylinder, and this pressure information of feedback forms the 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 to move 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.
It also comprises the steps:
(4) arrange one and be connected with described closed loop servo electrohydraulic control system, be used for realizing the protective device of emergency shutdown or security alarm; This protective device is comprised of a photophore, a light-receiving device and a controller; Described photophore is comprised of some luminescence units, is used for launching IR, those luminescence units is successively set on to a strip pole A upper, and this strip pole A is vertically set on to described front end one side of stating workbench; Described light-receiving device is comprised of some light receiving units, be used for receiving IR, those light receiving units are successively set on a strip pole B, and this strip pole B is vertically set on to the described front end opposite side of stating workbench, and corresponding with described photophore, form protection light curtain, produce logical light, shielding signals, by signal cable, be transferred to controller; Described controller is photophore, light-receiving device power supply, and processes 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) bottom at the position of protruding in described lower protuberance is provided with a lower hydraulic means be connected with described closed loop servo electrohydraulic control system, is used for the mould on workbench or workpiece are ejected; This time hydraulic means comprises a footstock, a fixed mount and a plunger-type cylinder, this plunger-type cylinder is fixed on 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 pre-entering the duty of correlation technique parameter request and real-time monitoring closed loop servo electrohydraulic control system;
(7) operating desk is set, realizes the duty of manual Control loop servo electrohydraulic control system;
(8) switch on power, the closed loop servo electrohydraulic control system initializes, and by control panel, inputs required correlation technique parameter, and automatic mode or manual mode are established in choosing; During elected automatic mode, Programmable Logic Controller sends control instruction automatically, by described hydraulic pressure supply unit, drives upper hydraulic means to realize corresponding punching press action; After the punching press action, lower hydraulic means is automatically by the workpiece on workbench or mould ejection; During elected manual mode,, by the described operating desk of people's hand operated, make programmable controller send enabled instruction, realize corresponding punching press action, after the punching press action, then, by this operating desk of people's hand operated, start described lower hydraulic means by the workpiece on workbench or mould ejection;
Described step (4), (5), (6), (7) are without sequencing, and repeating step (8), realize continuous circulation punching press action.
A kind of forcing press of implementing above-mentioned servo electrohydraulic composite pressure method, it comprises a frame, it also comprises on one hydraulic means and is connected 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 lower protuberance of bottom, wherein upper convex portion and lower protuberance protrude to the same side, the monnolithic case profile is one "] " shape, the upper surface at the position of protruding in described lower protuberance is provided with a workbench, described upper hydraulic means is arranged on the position that described upper convex portion protrudes, and towards described workbench.
Described upper hydraulic means 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 at least be provided with a lead on this its, described installing rack is provided with the guide hole suitable with this lead, and described lead stretches into this guide hole, and can slide up and down.
The bottom of the lower protuberance of described frame is provided with one and is connected with described closed loop servo electrohydraulic control system and is subject to the lower 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 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.
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 are connected 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.
Described hydraulic pressure supply unit comprises a servo valve, a certain amount of pump, one servo motor and a servo-driver, this servo-driver is connected 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 described upper hydraulic means, lower hydraulic means is connected, and be provided with a pressure sensor in its pipeline, this pressure sensor is connected with described servo-driver, one rotary encoder that is used for monitoring the flow of fluid in its rotating speed and described pipeline is set on described servo motor, this rotary encoder is connected with described Programmable Logic Controller.
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, and this pull bar appearance profile is one " L " shape, and its upper end is connected with described magnetic railings ruler, and lower end is connected with the upper pressure seat of described upper hydraulic means.
It also comprises a protective device be connected with described closed loop servo electrohydraulic control system, this protective device comprises a controller and the photophore and the light-receiving device that are connected with this controller respectively, described photophore comprises a strip pole A and some the setting on this strip pole A, and the luminescence unit be 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 be 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.
Beneficial effect of the present invention is: method provided by the invention adopts the servo electrohydraulic technology to replace the conventional hydraulic control technology, manufacture simple, efficiency is high, power consumption less, control accuracy is high, position control accuracy can reach the 0.01-0.02 millimeter, and can realize the functions such as compacting, stretching, the demoulding, president simultaneously, there is quite high processing flexibility; Press structure provided by the invention is reasonable, and volume is little, working stability, and performance is high, and noise is little, and applied range gathers the advantage of mechanical punch, hydraulic press and numerical control, has that function is many, cost is low and the advantage such as the pressure tonnage is large.Frame monnolithic case profile is one "] " shape, overall construction design is ingenious, structural strength is large, is beneficial to raising stability and volume little, low cost of manufacture; The closed loop servo electrohydraulic control system is by four closed-loop controls; realization reaches position, pressure, the high-precision control of speed; and power output is changed with load variations; there is no the overflow energy consumption; when pressurize and standby almost in stopped status; power consumption approaches 0, does not have the waste of excess energy, without cooling system.Can, according to different products, type and working method Lookup protocol joint source parameter, compare traditional hydraulic press and mechanical punch and can save electricity consumption 20%-80%, remarkable in economical benefits; Adopt servo motor, greatly improve the forcing press response time, compare the response speed of conventional asynchronous motor and obviously accelerate, pressing speed is faster, effectively shortens the work period, enhances productivity; Be provided with position detecting device, effectively guarantee the stability of product quality, reduce fraction defective.Its pull bar adopts the modified heat treatment of 40Cr, hard chrome plating surface treatment.Intensity is good, and stress deformation is little, makes machine more accurate, and safety coefficient is higher, and antifatigue, anti-alternate load, wear-resistant, extend machine service life more.Adopt plunger-type cylinder and be combined with overall structure; fast response time; but Quick-pressing; more than its pressing speed can reach 400 mm/second, and its pressing result is better than standard machinery punch press, can extensively apply to the compacting of hardware or on-metallic article; not only improved production efficiency; and the protection product quality, operation is more steady, smooth and easy in addition, and maintenance is easy, cost is lower.Be provided with operating desk, facilitate people's hand operated, meet individual requirements.
Below in conjunction with drawings and Examples, the invention will be further described.
The accompanying drawing explanation
Fig. 1 is side-looking structural representation of the present invention;
Fig. 2 is main TV structure schematic diagram of the present invention;
Fig. 3 is perspective view of the present invention;
Fig. 4 is structural representation block diagram of the present invention.
The specific embodiment
Embodiment: referring to Fig. 1 to Fig. 4, the present embodiment provides a kind of servo electrohydraulic composite pressure method, and it comprises the following steps:
(1) frame 1 is set, this frame 1 comprises a support portion 11 and is symmetricly set on the upper convex portion 12 at 11 top, this support portion, the lower protuberance 13 of bottom, wherein upper convex portion 12 and lower protuberance 13 protrude to the same side, the monnolithic case profile is one "] " shape, overall construction design is ingenious, structural strength is large, be beneficial to raising stability and volume little, low cost of manufacture; The upper surface at the position of protruding in described lower protuberance 13 is provided with a workbench 14;
(2) hydraulic means 2 on is set on the position of protruding in the upper convex portion 12 of described frame 1, and on this, hydraulic means 2, towards the direction of described workbench 14, is used to provide downward pressure or the pulling force made progress;
Described step (2), it specifically comprises the steps:
(21) plunger-type cylinder 21 is set, is used for producing downward pressure or the pulling force made progress; Adopt plunger-type cylinder 21, action is fast, has improved production efficiency, moves more steady, smooth and easy, safeguard easily, and cost is lower.
(22) installing rack 22 is set, is used for described plunger-type cylinder 21 is fixed on the upper convex portion 12 of described frame 1;
(23) upper pressure seat 23 is set, is used for clamping mold, this upper pressure seat 23 is fixed on the piston rod of described plunger-type cylinder 21;
(24) four leads 24 are set, the movement locus up or down of described upper pressure seat 23 is used for leading, those leads 24 are symmetricly set on the periphery of described upper pressure seat 23, and corresponding each lead 24 respectively is provided with a guide hole suitable with it on described installing rack 22;
(25) while installing, described upper pressure seat 23 is fixed on the piston rod of described plunger-type cylinder 21, and make the lead 24 on this upper pressure seat 23 stretch into guide hole corresponding thereto, and can correspondingly slide up and down with the piston expanding-contracting action of described plunger-type cylinder 21.
(3) a closed loop servo electrohydraulic control system is set, this closed loop servo electrohydraulic control system is connected with described upper hydraulic means 2, and controls its duty.
Described step (3), 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 the corresponding rotary speed information of feedback and flow information; Described servo valve is used for the flow of fluid in monitored pipeline; Described pressure sensor is used for detecting the pressure of plunger-type cylinder 21, and the feedback pressure information;
(32) position detecting device 3 is set, is used for detecting the position of described upper pressure seat 23, and the corresponding location coordinate information of feedback; This position detecting device 3 comprises that a magnetic railings ruler 31 and adopts the pull bar 32 of the modified heat treatment of 40Cr, plating hard chromium on surface, these pull bar 32 appearance profiles are one " L " shape, its upper end is connected with described magnetic railings ruler 31, and lower end is fixed on the upper pressure seat 23 of described upper hydraulic means 2; Pull bar 32 adopts the modified heat treatment of 40Cr, hard chrome plating surface treatment.Intensity is good, and stress deformation is little, makes machine more accurate, and safety coefficient is higher, and antifatigue, anti-alternate load, wear-resistant, extend machine service life more.
(33) Programmable Logic Controller is set, is used for receiving, processing the information of described hydraulic pressure supply unit and 3 feedbacks of position detecting device, and require the duty of corresponding this hydraulic pressure supply unit of control according to the technical parameter set in advance;
(34) form the closed loop servo electrohydraulic control system: described servo driver drives servo motor drives the 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 forms the first closed-loop control; Described pressure sensor detects the pressure size of plunger-type cylinder 21, and this pressure information of feedback forms the second closed-loop control to described servo-driver; The flow of the fluid of described plunger-type cylinder 21 is flowed out or enters in described servo valve monitoring, forms the 3rd closed-loop control; Described servo valve control plunger-type cylinder 21 drives upper pressure seat 23 to move downward or upward, is detected by described position detecting device 3, and its location coordinate information is fed back to Programmable Logic Controller, forms the 4th closed-loop control.By four closed-loop controls, realize reaching position, pressure, the high-precision control of speed, and power output is changed with load variations; there is no the overflow energy consumption, when pressurize and standby, almost in stopped status, power consumption approaches 0; there do not is the waste of excess energy, without cooling system.Can, according to different products, type and working method Lookup protocol joint source parameter, compare traditional hydraulic press and mechanical punch and can save electricity consumption 20%-80%, remarkable in economical benefits;
(4) arrange one and be connected with described closed loop servo electrohydraulic control system, be used for realizing the protective device 4 of emergency shutdown or security alarm, guarantee operating personnel's safety; This protective device 4 is comprised of a photophore 41, a light-receiving device 42 and a controller; Described photophore 41 is comprised of some luminescence units, is used for launching IR, those luminescence units is successively set on to a strip pole A upper, and this strip pole A is vertically set on to described front end one side of stating workbench 14; Described light-receiving device 42 is comprised of some light receiving units, be used for receiving IR, those light receiving units are successively set on a strip pole B, and this strip pole B is vertically set on to the described front end opposite side of stating workbench 14, and corresponding with described photophore 41, form protection light curtain, produce logical light, shielding signals, by signal cable, be transferred to controller; Described controller is photophore 41, light-receiving device 42 power supplies, and processes logical light, the shielding signals that light-receiving device 42 produces, and produces control signal, and is transferred to described closed loop servo electrohydraulic control system.
(5) bottom at the position of protruding in described lower protuberance 13 is provided with a lower hydraulic means 5 be connected with described closed loop servo electrohydraulic control system, is used for the mould on workbench 14 or workpiece are ejected; This time hydraulic means 5 comprises a footstock 51, a fixed mount 52 and a plunger-type cylinder 53, this plunger-type cylinder 53 is fixed on described frame by described fixed mount 52, described footstock 51 is fixed on the piston rod of this plunger-type cylinder 53, and to being provided with an opening that allows it stretch out in described workbench 14 in footstock 51 positions;
(6) control panel 6 is set, is used for pre-entering the duty of correlation technique parameter request and real-time monitoring closed loop servo electrohydraulic control system;
(7) operating desk 7 is set, realizes the duty of manual Control loop servo electrohydraulic control system, meet individual requirements;
(8) switch on power, the closed loop servo electrohydraulic control system initializes, and by the required correlation technique parameter of control panel 6 input, and automatic mode or manual mode are established in choosing; During elected automatic mode, Programmable Logic Controller sends control instruction automatically, by described hydraulic pressure supply unit, drives upper hydraulic means 2 to realize corresponding punching press action; After the punching press action, lower hydraulic means 5 is automatically by the workpiece on workbench 14 or mould ejection; During elected manual mode,, by the described operating desk 7 of people's hand operated, make programmable controller send enabled instruction, realize corresponding punching press action, after the punching press action, then, by this operating desk 7 of people's hand operated, start described lower hydraulic means 5 by the workpiece on workbench 14 or mould ejection;
Described step (4), (5), (6), (7) are without sequencing, and repeating step (8), realize continuous circulation punching press action.
A kind of forcing press of implementing above-mentioned servo electrohydraulic composite pressure method, it comprises a frame 1, it also comprises on one hydraulic means 2 and is connected with hydraulic means on this 2, and control the closed loop servo electrohydraulic control system of its duty, described frame 1 comprises a support portion 11 and is symmetricly set on the upper convex portion 12 at 11 top, this support portion, the lower protuberance 13 of bottom, wherein upper convex portion 12 and lower protuberance 13 protrude to the same side, the monnolithic case profile is one "] " shape, the upper surface at the position of protruding in described lower protuberance 13 is provided with a workbench 14, described upper hydraulic means 2 is arranged on the position that described upper convex portion 12 protrudes, and towards described workbench 14.
Described upper hydraulic means 2 comprises a upper pressure seat 23, an installing rack 22 and a plunger-type cylinder 21, this plunger-type cylinder 21 is fixed on the upper convex portion 12 of described frame 1 by described installing rack 22, and make its piston rod towards described workbench 14, described upper pressure seat 23 is arranged on this piston rod, and at least be provided with a lead 24 on this its, described installing rack 22 is provided with the guide hole suitable with this lead 24, and described lead 24 stretches into this guide hole, and can slide up and down.
The bottom of the lower protuberance 13 of described frame 1 is provided with one and is connected with described closed loop servo electrohydraulic control system and is subject to the lower hydraulic means 5 of its control, this time hydraulic means 5 comprises a footstock 51, a fixed mount 52 and a plunger-type cylinder 53, this plunger-type cylinder 53 is fixed on described frame 1 by described fixed mount 52, described footstock 51 is fixed on the piston rod of plunger-type cylinder 53, and to being provided with an opening that allows it stretch out in described workbench 14 in footstock 51 positions.
Described closed loop servo electrohydraulic control system comprises a Programmable Logic Controller and the hydraulic pressure supply unit be connected with this Programmable Logic Controller respectively, position detecting device 3, operating desk 7, control panel 6, this control panel 6 is arranged on upper convex portion 12 1 sides of described frame 1, described operating desk 7 is arranged on the centre position of the front end face of described workbench 14, facilitate people's hand operated, meet individual requirements; Described position detecting device 3 is arranged on support portion 11 1 sides of described frame 1.
Described hydraulic pressure supply unit comprises a servo valve, a certain amount of pump, one servo motor and a servo-driver, this servo-driver is connected 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 described upper hydraulic means 2, lower hydraulic means 5 is connected, and be provided with a pressure sensor in its pipeline, this pressure sensor is connected with described servo-driver, one rotary encoder that is used for monitoring the flow of fluid in its rotating speed and described pipeline is set on described servo motor, this rotary encoder is connected with described Programmable Logic Controller.Adopt servo motor, greatly improve the forcing press response time, compare the response speed of conventional asynchronous motor and obviously accelerate, pressing speed is faster, effectively shortens the work period, enhances productivity; Be provided with position detecting device 3, effectively guarantee the stability of product quality, reduce fraction defective.
Described position detecting device 3 comprises that a magnetic railings ruler 31 and adopts the pull bar 32 of the modified heat treatment of 40Cr, plating hard chromium on surface, these pull bar 32 appearance profiles are one " L " shape, its upper end is connected with described magnetic railings ruler 31, and lower end is connected with the upper pressure seat 23 of described upper hydraulic means 2.It also comprises a protective device 4 be connected with described closed loop servo electrohydraulic control system, effectively protects operating personnel's safety, and in the time of in staff enters workbench 14 scopes, automatic alarm or emergency shutdown, safe.Protective device 4 comprises a controller and the photophore 41 be connected with this controller respectively and light-receiving device 42, described photophore 41 comprises a strip pole A and some the setting on this strip pole A, and the luminescence unit be arranged in order along its long side direction, described strip pole A is vertically set on front end one side of described workbench 14; Described light-receiving device 42 comprises a strip pole B and some the setting on this strip pole B, and the light receiving unit be 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 14.
During work, set the correlation technique parameter by control panel 6 in advance, as requirements such as speed and pressure process, and automatic mode or manual mode are established in choosing; Then on described upper pressure seat 23, diel is installed, on described workbench 14, the corresponding counterdie of clamping or direct the placement need stamped workpieces; During elected automatic mode, Programmable Logic Controller sends control instruction automatically, by described hydraulic pressure supply unit, drives upper hydraulic means 2 to realize corresponding punching press action; After punching press action, workpiece or counterdie that lower hydraulic means 5 presses workbench 14 upper punches automatically eject, and being convenient to reappose needs stamped workpieces or mold exchange more; During elected manual mode, by the described operating desk 7 of people's hand operated, make programmable controller send enabled instruction, thereby realize corresponding punching press action, after punching press action, and then by this operating desk 7 of people's hand operated, start that described lower hydraulic means 5 presses workbench 14 upper punches or counterdie and eject, being convenient to reappose needs stamped workpieces or mold exchange more, meets different functions and uses and individual demand.Adopt the servo electrohydraulic technology to replace the conventional hydraulic control technology, rational in infrastructure, manufacture simple, volume is little, working stability, efficiency are high, can realize the functions such as compacting, stretching, the demoulding, president simultaneously, there is quite high processing flexibility, and the power consumption less, noise is little, control accuracy is high, position control accuracy can reach the 0.01-0.02 millimeter, the advantage of mechanical punch, hydraulic press and numerical control is gathered, have that function is many, cost is low and the advantage such as the pressure tonnage is large.
As described in the above embodiment the present invention, adopt technical characterictic same or similar with it and other pressure method and the forcing press that obtain, all in protection domain of the present invention.
Claims (6)
1. the preparation method of a servo electrohydraulic composite pressure machine, is characterized in that, it comprises the following steps:
(1) prepare a frame: at first a support portion is set, top in support portion arranges upper convex portion, in the bottom of support portion, lower protuberance is set, wherein upper convex portion and lower protuberance protrude to the same side, the monnolithic case profile is one "] " shape, on the upper surface at the position of protruding in described lower protuberance, a workbench is set, forms described frame;
(2) prepare hydraulic means on: hydraulic means on is set on the position of protruding in the upper convex portion of described frame, and on this, hydraulic means, towards the direction of described workbench, is used to provide downward pressure or the pulling force made progress;
(21) prepare a plunger-type cylinder, be used for producing downward pressure or the pulling force made progress;
(22) prepare an installing rack, be used for described plunger-type cylinder is fixed on the upper convex portion of described frame;
(23) prepare a upper pressure seat, be used for clamping mold, this upper pressure seat is fixed on the piston rod of described plunger-type cylinder;
(24) prepare four leads, 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;
(25), while 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 thereto, and can correspondingly slide up and down with the piston expanding-contracting action of described plunger-type cylinder;
(3) prepare a closed loop servo electrohydraulic control system: the closed loop servo electrohydraulic control system is connected with described upper hydraulic means, and controls its duty;
(31) prepare a hydraulic pressure supply unit, be 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 the corresponding rotary speed information of feedback and flow information; Described servo valve is used for the flow of fluid in monitored pipeline; Described pressure sensor is used for detecting the pressure of plunger-type cylinder, and the feedback pressure information;
(32) prepare a position detecting device, be 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 lower end is fixed on the upper pressure seat of described upper hydraulic means;
(33) prepare a Programmable Logic Controller, be used for receiving, processing 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 set in advance;
(34) form the closed loop servo electrohydraulic control system: described servo driver drives servo motor drives the 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 forms the first closed-loop control; Described pressure sensor detects the pressure size of plunger-type cylinder, and this pressure information of feedback forms the 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 to move 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.
2. the preparation method of servo electrohydraulic composite pressure machine according to claim 1, is characterized in that, it also comprises the steps:
(4) prepare a protective device: it is connected with described closed loop servo electrohydraulic control system, is used for realizing emergency shutdown or security alarm; This protective device is comprised of a photophore, a light-receiving device and a controller; Described photophore is comprised of some luminescence units, is used for launching IR, those luminescence units is successively set on to a strip pole A upper, and this strip pole A is vertically set on to described front end one side of stating workbench; Described light-receiving device is comprised of some light receiving units, be used for receiving IR, those light receiving units are successively set on a strip pole B, and this strip pole B is vertically set on to the described front end opposite side of stating workbench, and corresponding with described photophore, form protection light curtain, produce logical light, shielding signals, by signal cable, be transferred to controller; Described controller is photophore, light-receiving device power supply, and processes 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) prepare hydraulic means, the bottom that it is arranged at the position that described lower protuberance protrudes, be connected with described closed loop servo electrohydraulic control system, is used for the workpiece on workbench or mould ejection; This time hydraulic means comprises a footstock, a fixed mount and a plunger-type cylinder, this plunger-type cylinder is fixed on 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) prepare a control panel: the duty that is used for arranging technical parameter requirement and real-time monitoring closed loop servo electrohydraulic control system;
(7) prepare an operating desk: the duty that realizes manual Control loop servo electrohydraulic control system;
(8) switch on power, the closed loop servo electrohydraulic control system initializes, and by control panel, inputs required correlation technique parameter, and automatic mode or manual mode are established in choosing; During elected automatic mode, Programmable Logic Controller sends control instruction automatically, by described hydraulic pressure supply unit, drives upper hydraulic means to realize corresponding punching press action; After the punching press action, lower hydraulic means is automatically by the workpiece on workbench or mould ejection; During elected manual mode,, by the described operating desk of people's hand operated, make programmable controller send enabled instruction, realize corresponding punching press action, after the punching press action, then, by this operating desk of people's hand operated, start described lower hydraulic means by the workpiece on workbench or mould ejection;
Described step (4), (5), (6), (7) are without sequencing.
3. one kind implements the claims forcing press prepared by 1 described method, it is characterized in that, the bottom of the lower protuberance of described frame is provided with one and is connected with described closed loop servo electrohydraulic control system and is subject to the lower 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 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.
4. forcing press according to claim 3, 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 are connected 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.
5. forcing press according to claim 3, 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 is connected 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 described upper hydraulic means, lower hydraulic means is connected, and be provided with a pressure sensor in its pipeline, this pressure sensor is connected with described servo-driver, one rotary encoder that is used for monitoring the flow of fluid in its rotating speed and described pipeline is set on described servo motor, this rotary encoder is connected with described Programmable Logic Controller.
6. forcing press according to claim 3, it is characterized in that, it also comprises a protective device be connected with described closed loop servo electrohydraulic control system, this protective device comprises a controller and the photophore and the light-receiving device that are connected with this controller respectively, described photophore comprises a strip pole A and some the setting on this strip pole A, and the luminescence unit be 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 be 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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| CN201010260933.6A CN101927578B (en) | 2010-08-24 | 2010-08-24 | Servo electrohydraulic composite pressure method and press machine thereof |
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| CN201010260933.6A CN101927578B (en) | 2010-08-24 | 2010-08-24 | Servo electrohydraulic composite pressure method and press machine thereof |
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| CN101927578B true CN101927578B (en) | 2014-01-08 |
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| CN102152495A (en) * | 2011-02-24 | 2011-08-17 | 无锡市蓝力机床有限公司 | Energy-saving hydropress control system |
| CN102218847A (en) * | 2011-03-04 | 2011-10-19 | 南通富士通微电子股份有限公司 | Hydraulic punching machine |
| CN102336029A (en) * | 2011-10-13 | 2012-02-01 | 湖州机床厂有限公司 | Servo control system for hydraulic machine |
| CN102527841A (en) * | 2011-12-15 | 2012-07-04 | 苏州和林精密科技有限公司 | Stamping mould with infrared detecting device |
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| CN102825566B (en) * | 2012-05-15 | 2015-11-25 | 重庆科技学院 | Press-fit and use magnetic clamping device |
| CN102913509A (en) * | 2012-11-23 | 2013-02-06 | 湖北汽车工业学院 | Electrohydraulic pressurizing cylinder and pressing machine equipment with same |
| CN103042707B (en) * | 2012-12-18 | 2015-08-12 | 河海大学常州校区 | Mechanical-hydraulic Hybrid-Driven Mechanical Press |
| CN103286164A (en) * | 2013-03-25 | 2013-09-11 | 宁波和昌液压设备有限公司 | Single straightening press adopting close-loop control |
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| CN107175307B (en) * | 2016-03-10 | 2020-09-08 | 上海工程技术大学 | Real-time displacement measuring and controlling device of screw press |
| CN106142643A (en) * | 2016-07-31 | 2016-11-23 | 陈善新 | A kind of hydraulic press possessing detection workpiece performance |
| WO2019169521A1 (en) * | 2018-03-05 | 2019-09-12 | 江苏铭格锻压设备有限公司 | Integrated hydraulic machine |
| CN112524121B (en) * | 2019-09-18 | 2022-09-23 | 上海禾之木工业设备有限公司 | On-line monitoring system based on servo hydraulic system |
| CN111391395B (en) * | 2020-03-24 | 2021-12-14 | 扬州精善达伺服成形装备有限公司 | Press slide multi-point servo adjusting system |
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| CN87213799U (en) * | 1987-09-22 | 1988-09-14 | 刘海泉 | Clamp on multi function oil pump |
| CN2717677Y (en) * | 2004-07-23 | 2005-08-17 | 天津市天锻压力机有限公司 | Quadrangular balance electrohydraulic controller for super large planar hydraulic press |
| JP4604288B2 (en) * | 2005-01-12 | 2011-01-05 | アイダエンジニアリング株式会社 | Drive device for movable plate and slide drive device for press machine |
| CN2908135Y (en) * | 2005-12-21 | 2007-06-06 | 陈锐球 | Four-column type stretching expansion hydraulic press |
| CN100593646C (en) * | 2008-07-31 | 2010-03-10 | 哈尔滨工业大学 | Unpowered oil supplied direct drive displacement control electrohydraulic servo- closed type oil source system |
| CN101712207A (en) * | 2009-09-08 | 2010-05-26 | 广东工业大学 | High performance and energy-saving double-acting hydrostatic press driven by servo motor |
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