CN111408679A - Hydraulic machine based on no-load feeding dynamic initial positioning function and electrical control system - Google Patents
Hydraulic machine based on no-load feeding dynamic initial positioning function and electrical control system Download PDFInfo
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- CN111408679A CN111408679A CN202010227699.0A CN202010227699A CN111408679A CN 111408679 A CN111408679 A CN 111408679A CN 202010227699 A CN202010227699 A CN 202010227699A CN 111408679 A CN111408679 A CN 111408679A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/08—Accessories for handling work or tools
- B21J13/14—Ejecting devices
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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Abstract
The invention discloses a hydraulic machine and an electrical control system based on a no-load feeding dynamic initial positioning function, which comprise an electrical cabinet, a hydraulic machine body special for liquid metal punching, a hydraulic station special for liquid metal punching, a piano type operating platform, a motor starting circuit, a control transformer, a voltage-stabilized power supply, an electro-hydraulic servo control system, a proportional amplifier for controlling a proportional overflow valve, a P L C CPU module, an I/O module, an analog input/output module, a man-machine interaction interface, a motion controller module, a centralized operation panel, an intermediate relay, a displacement sensor, a pressure sensor, an electromagnetic valve and a proportional overflow valve.
Description
Technical Field
The invention relates to the technical field of hydraulic forging equipment and electrical control thereof, in particular to a hydraulic machine based on a no-load feeding dynamic initial positioning function and an electrical control system.
Background
The liquid metal punching special hydraulic press is mainly used for metal liquid thermoforming and other processes, has wide application, and relates to industries including the manufacture and production of main stressed parts of automobiles and ships and counter weights of elevators and loaders; the special hydraulic press has the following well-recognized defects in the technical process of metal liquid forming forging:
(1) the pressurizing speed of the slide block is insufficient, the temperature of liquid metal is influenced, so that the stamping resistance of a material jacking of the stamping cylinder is increased, the liquidity of the liquid metal entering a forming cavity is reduced, the phenomenon of uneven distribution of molten metal at each position is avoided, and the quality of a final product is greatly influenced;
(2) the liquid metal punching press without the feeding function has the defects of shrinkage porosity and shrinkage cavity easily formed in the product;
(3) the liquid metal stamping press with the feeding function has no-load dynamic initial position holding function; when the liquid metal is punched, the material quantity and the punching speed cannot be completely guaranteed, so that the feeding quantity cannot be accurately finished, a raised head or a groove appears in a final product, the secondary processing cost is increased, and the rejection rate is high;
(4) the pressure maintaining time period in the forming process is long, the consumption of useless power and electric energy is large, and the noise pollution is serious.
Therefore, it is necessary to invent a hydraulic machine and an electrical control system based on the empty feeding dynamic initial positioning function to solve the above problems.
Disclosure of Invention
The purpose of the invention is:
1. an energy accumulator is additionally arranged on the hydraulic station, so that the die assembly and pressurization speeds of the sliding block are improved, the die assembly time is shortened, and the phenomena of poor fluidity, cold shut and cracks of a product caused by cooling of liquid metal due to overlong waiting time are avoided;
2. the electric control system of the hydraulic machine has the feeding function and can realize dynamic positioning and holding during no-load, when the liquid metal die forging forming process is carried out, the position and the pressure of a feeding cylinder are adjusted by realizing real-time control of a proportional servo valve system through a motion controller, the phenomena of shrinkage porosity, shrinkage cavity, raised head or groove of a product are avoided, the qualified rate of the product is greatly improved, the cost of the product is reduced, and raw materials are saved.
3. The hydraulic station adopts an electro-hydraulic servo system as a power system, so that the noise is reduced; and the small-flow pump source maintains pressure and supplements pressure, so that the electric energy loss is reduced.
4. The four ejection cylinders distributed at four corners are separately controlled, the proximity switches are respectively used for detecting different positions of the four ejection cylinders, and the oil feeding amount is controlled by the servo driver in a simulated loading mode to realize the relative synchronous demoulding of the ejection cylinders. The cost of using the linear displacement sensor is reduced, and the problem that the four cylinders are completely asynchronous due to different friction and resistance when the four cylinders are controlled simultaneously is solved.
The hydraulic press and the electric control system based on the no-load feeding dynamic initial positioning function comprise an electric cabinet, a hydraulic press body special for liquid metal punching, a hydraulic station (containing an energy accumulator) of the hydraulic press special for liquid metal punching, a piano type operation console, a centralized operation panel, three high-precision displacement sensors, a pressure sensor, a limit travel switch, an electromagnetic valve group, a servo valve and a proportional overflow valve, and are characterized in that a motor starting circuit, a control transformer, a stabilized voltage power supply, a servo driver, a proportional amplifier and a P L C CPU module are installed in the electric cabinet, the CPU module is connected with an I/O module, an analog input/output module, a man-machine interaction interface (touch screen) and a motion controller module (HMC for short) which are connected with a hydraulic pressure controller of the hydraulic press, the hydraulic station special for liquid metal punching comprises an energy accumulator and a servo motor, the piano type operation console is arranged on the right side ground of the hydraulic press body special for liquid metal punching, and comprises a human-machine interface and a central operation panel, all mechanism control buttons, wherein the buttons are provided with a slide locking button, a slide block, a release button, an up button, a slide block, a hydraulic control module, a hydraulic cylinder, a hydraulic control module, a hydraulic cylinder, a hydraulic control module, a hydraulic cylinder, a hydraulic control module, a hydraulic.
Preferably, the control transformer provides an AC220V control voltage and the regulated power supply provides a DC24V voltage.
Preferably, the centralized operation panel is provided with control buttons of all mechanisms of the hydraulic body.
Preferably, the human-computer interface comprises a state monitoring window for various information of the liquid metal punching type hydraulic machine, a formula picture window of each mechanism, process pictures of different products, a window for monitoring the current execution of a product pressed by the hydraulic machine and the real-time state of each mechanism, a fault alarm picture window for displaying and recording fault alarm content and alarm time, and a monitoring picture window for monitoring the on-off of each I/O point of P L C.
Preferably, the accumulator on the hydraulic station is used for rapidly pressurizing the slide block, so that the effect of shortening the clamping and pressurizing time of the slide block is achieved.
Preferably, the motion controller module is used for detecting the pressure and the position of a rod cavity and a rodless cavity of the compensating cylinder, and controlling a servo valve on the hydraulic station in real time according to feedback, so that the compensating cylinder can be positioned and dynamically kept at the position both in no-load and load, and is not influenced by external friction force and other resistance (such as thermal expansion force).
Preferably, the servo driver is used for regulating and controlling the pressure and the speed of each mechanism of the hydraulic machine, the electric energy loss is reduced, and the noise generated when the hydraulic machine works is reduced.
Preferably, the pressure sensor has a voltage type pressure range of 0-10V and a current type current range of 4-20 MA.
The hydraulic machine and the electrical control system based on the no-load feeding dynamic initial positioning function have the following operation steps:
s1, starting the motor through the motor starting button; setting required parameters through parameter setting picture windows of all mechanisms of the special hydraulic machine for setting the liquid metal stamping;
s2, manually or mechanically pouring a fixed-temperature and fixed-quantity liquid metal into the cavity of the lower die;
s3, pressing the slide block descending button, enabling the slide block to descend rapidly, and driving the shrinkage supplement cylinder to descend synchronously;
s4, when the feeding cylinder is driven to move downwards by the sliding block, the feeding cylinder starts to eject, and the position of the feeding cylinder in operation is detected by the displacement sensor; after the feeding cylinder descends to the set initial position, the no-load position is maintained; the compensation cylinder carries out self-regulation according to the actual temperature of the external environment, the friction force and the impact force of the liquid metal and keeps the initial position unchanged;
s5, detecting the running position of the sliding block through the displacement sensor, and after the sliding block is rotated to the set fast-rotating slow-rotating position, rotating the sliding block to descend at a slow speed and pressurizing, and meanwhile, performing fast-releasing energy on the energy accumulator;
s6, detecting the pressure of the slide block through the pressure sensor, and pressing the slide block to maintain the pressure when the pressure is increased to a set pressure value of the slide block;
s7, when the pressure maintaining is carried out on the slide block, the feeding cylinder is in a dynamic no-load positioning state, the punching cylinder is quickly jacked up, and the liquid metal is jacked into the upper die cavity;
s8, after the molten metal is completely flushed into the die cavity, slowly pressurizing, detecting the pressure value of the pressure of the stamping cylinder through the pressure sensor, and when the pressure value reaches the set pressure, enabling the stamping cylinder to enter a pressure maintaining stage;
s9, delaying for a certain time after the pressure maintaining of the stamping cylinder, wherein the time can be set through the human-computer interface; performing secondary ejection on the feeding cylinder, feeding the semi-formed molten metal in the mold cavity, and stopping acting and releasing pressure after feeding to a set position;
s10, after the pressure relief of the feeding cylinder is finished, simultaneously relieving the pressure of the sliding block and the punching cylinder, and after the pressure relief is finished, slowly opening the die of the punching cylinder and the sliding block; the punching cylinder detects the running position of the punching cylinder through the displacement sensor, and the punching cylinder rapidly returns to the initial position after the die opening of the sliding block to the set position;
s11, slowly ejecting the four ejector cylinders, and ejecting the cooled workpiece in the die cavity to the outside of the die cavity;
s12, rapidly returning the slide block and the feeding cylinder to the initial position and stopping the motion;
s13, manually or mechanically fetching materials, and rapidly returning the ejection cylinder to the initial position and stopping; from the completion of this single cycle, the operation is repeated by returning to step S3 to perform the next product pressing operation.
The invention has the technical effects and advantages that:
1. the invention relates to a special hydraulic machine for punching liquid metal with a no-load feeding dynamic initial positioning function and an electrical control system thereof. The secondary belt load that enters the feeding cylinder is pressurized and positioned, thereby producing a qualified product. Because the control precision is high, the speed is high, the phenomenon of cracking during feeding of products is avoided, the qualification rate of the products is greatly improved, the cost of the products is reduced, and raw materials are saved.
2. The invention uses the electro-hydraulic servo control system to realize stepless pressure and speed regulation of each mechanism of the hydraulic press, thereby saving the cost and reducing the noise pollution.
3. The invention applies the detection device for the middle position of the ejection cylinder and the separate control system for the ejection cylinder, can relatively synchronously control the four ejection cylinders, and reduces the damage to incompletely-cooled workpieces due to asynchronous demoulding.
4. The invention has the advantages of powerful function, simple and convenient operation, strong practicability and convenient communication.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the feeding cylinder structure of the present invention;
FIG. 3 is a schematic view of the head cylinder and intermediate position sensing arrangement of the present invention;
FIG. 4 is a schematic structural diagram of a centralized operation panel according to the present invention;
FIG. 5 is a diagram illustrating a structure of a frame window of the human-computer interface according to the present invention;
fig. 6 is a flowchart of an overall structure control method of the present invention.
In the figure: 1. an electrical cabinet; 2. a special hydraulic press body for liquid metal stamping; 3. a hydraulic station of a hydraulic machine special for liquid metal stamping; 4. a motor start circuit; 5. controlling the transformer; 6. a regulated power supply; 7. an I/O module; 8. a servo driver; 9. a motion controller module; 10. an intermediate relay; 11. a displacement sensor; 12. a proportional amplifier; 13. a piano-type operating table; 14. a limit travel switch; 15. a pressure sensor; 16. an electromagnetic valve group; 17. a servo valve; 18. a proportional relief valve; 19. a human-machine interface; 20. a centralized operation panel; 21. a slider locking button; 22. the sliding block releases the button; 23. a slider up-link button; 24. a slider down button; 25. a punch cylinder up button; 26. a punch cylinder down button; 27. a cylinder ascending button is supplemented; 28. a cylinder descending button is supplemented; 29. a top cylinder up button; 30. a top cylinder down button; 31. punching an oil circuit advancing button; 32. punching an oil circuit retreating button; 33. a press adjustment automatic semi-automatic selection button; 34. selecting buttons by two hands in front of the press, four hands in back of the press; 35. a motor start button; 36. an emergency stop button; 37. the whole machine is a static button.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the hydraulic machine and the electrical control system based on the no-load feeding dynamic initial positioning function shown in the figures 1-6 comprise an electrical cabinet 1, a liquid metal punching special hydraulic machine body 2, a liquid metal punching special hydraulic machine hydraulic station 3, a piano type operating platform 13, a centralized operating panel 20, three high-precision displacement sensors 11, a pressure sensor 15, a limit travel switch 14, an electromagnetic valve group 16, a servo valve 17 and a proportional overflow valve 18, wherein a motor starting circuit 4, a control transformer 5, a stabilized voltage power supply 6, a servo driver 8, a proportional amplifier 12 and a CPU module of P L C are installed in the electrical cabinet 1, the CPU module is connected with an I/O module 7, an analog quantity input/output module, a man-machine interaction interface touch screen and a motion controller module 9, called HMC for short, the liquid metal punching special hydraulic station 3 comprises an energy accumulator and a servo motor, wherein the control transformer 5 and the stabilized voltage power supply 6 are both installed in the electrical cabinet 1, the control transformer 5 provides AC220V control voltage, and the regulated power supply 6 provides DC 24V;
further, in the above technical solution, the piano type operation platform 13 is arranged on the right front side ground of the hydraulic press body 2 special for liquid metal stamping, and comprises a 15.4 inch man-machine interface 19 and a centralized operation panel 20;
further, in the above technical solution, the centralized operation panel 20 is disposed on the piano type operation console 13, and includes a slider locking button 21, a slider releasing button 22, a slider up-moving button 23, a slider down-moving button 24, a punching cylinder up-moving button 25, a punching cylinder down-moving button 26, a feeding cylinder up-moving button 27, a feeding cylinder down-moving button 28, a top cylinder up-moving button 29, a top cylinder down-moving button 30, a punching oil path forward button 31, a punching oil path backward button 32, a press adjustment automatic semi-automatic selection button 33, a press front two-hand four-hand rear two-hand selection button 34, a motor starting button 35, an emergency stop button 36, and a full machine static button 37; these buttons are connected to the I/O module 7;
further, in the above technical solution, the motor starting circuit 4 and the servo driver 8 are installed in the electrical cabinet 1, the motor starting is controlled by the motor starting button 35 on the centralized operation panel 20, and the motor stopping is controlled by the emergency stop button 36 on the centralized operation panel 20; the servo driver 8 is connected with a servo motor, a pump port pressure sensor 15 and a motor embedded encoder which are connected with the motor are connected into the servo driver 8, closed-loop control of flow and pressure is carried out, and stepless and high-precision adjustment of speed and pressure is achieved;
furthermore, in the technical scheme, the energy accumulator is arranged on the hydraulic station 3 of the special hydraulic press for liquid metal stamping, the flow outlet is connected into a rod-free cavity of a main cylinder of the sliding block, and in the slow-down and pressurizing processes of the sliding block, the energy accumulator instantly releases energy, so that the slow-down and pressurizing speeds of the sliding block are accelerated, the die closing time is shortened, and the temperature of liquid metal is fully ensured;
further, in the above technical solution, an amplifier controlling the proportional relief valve 18 is installed in the electrical cabinet 1, and an input signal of the proportional amplifier 12 is connected to the analog output module; the proportional overflow valve 18 is arranged on the hydraulic station 3 of the liquid metal punching special hydraulic machine, the output signal of the proportional amplifier 12 is connected with the proportional overflow valve 18, the opening size of the proportional overflow valve 18 is controlled in real time through the signal given by the proportional amplifier 12 by the proportional overflow valve 18, and the proportional overflow valve and the servo motor form a double-ring adjusting slide block and the pressure of the punching cylinder;
furthermore, in the technical scheme, a set of middle detection device is additionally arranged in the middle of the jacking cylinder, a detection signal is accessed into the I/O module 7, and the servo driver 8 and the solenoid valve set 16 are controlled by the analog output module and the I/O module 7, so that relative synchronization of four cylinders is realized to the maximum extent;
further, in the above technical solution, two cavities of the retraction cylinder are connected to the oil port of the servo valve 17, and then the servo valve 17 is connected to the motion controller module 9, the motion controller module 9 is installed in the electric control cabinet, and the motion controller module 9 controls the servo valve 17 according to feedback signals of the displacement sensor 11 of the retraction cylinder and the pressure sensor 15 of the retraction cylinder; the no-load dynamic positioning of the compensation cylinder, and the positioning and pressurization in the presence of load are realized;
further, in the above technical solution, the slider displacement sensor 11 is respectively installed between two upright posts on the right side of the hydraulic press and on the stamping cylinder, and is connected with the CPU module through an industrial network cable for monitoring the positions of the slider and the stamping cylinder in real time; the pressure sensor 15 is arranged on pump ports driven by two servo motors of the hydraulic station 3 of the special hydraulic machine for liquid metal stamping, is connected with the servo driver 8 and is used for detecting the pressure of the pump ports in real time; the pressure sensor 15 is respectively arranged on the rodless cavities of the main cylinder and the punching cylinder, is connected with the I/O module 7 and is used for monitoring the pressure of the sliding block and the punching cylinder; the upper limit travel switch 14 and the lower limit travel switch 14 are both arranged between two upright columns on the right side of the liquid metal stamping special hydraulic machine body 2 and are both connected with the I/O module 7 for protecting the oil cylinder from being used in an overtravel mode;
further, in the above technical solution, the intermediate relay 10 is installed in the electrical cabinet 1, a coil of the intermediate relay 10 is connected to the I/O module 7, and a normally open contact of the intermediate relay 10 is connected to a coil of the electromagnetic valve bank 16; an intermediate relay 10 is directly connected with the I/O module 7, so that the service life of an output point of the I/O module 7 is prolonged;
further, in the above technical solution, the human-machine interface 19 is installed on the piano type console 13, the state monitoring windows of various information, the formula picture windows of each mechanism, the process pictures of different products, the window for monitoring the current execution of the product pressed by the hydraulic press and the real-time state of each mechanism, the failure alarm picture window for displaying and recording the failure alarm content and the alarm time, and the monitoring picture window for monitoring the on-off of each I/O point of P L C, wherein the human-machine interface 19 is connected with the CPU module through Ethernet;
further, in the above technical solution, the hydraulic machine and the electrical control system based on the no-load feeding dynamic initial positioning function have the following operation steps:
s1, starting the motor by the motor start button 35; setting required parameters through parameter setting picture windows of all mechanisms of the special hydraulic machine for setting the liquid metal stamping;
s2, manually or mechanically pouring a fixed-temperature and fixed-quantity liquid metal into the cavity of the lower die;
s3, pressing the slide block descending button 24 to make the slide block quickly descend and drive the compensation cylinder to synchronously descend;
s4, when the feeding cylinder is driven to move downwards by the sliding block, the feeding cylinder starts to eject, and the position of the feeding cylinder in operation is detected by the displacement sensor 11; after the feeding cylinder descends to the set initial position, the no-load position is maintained; the compensation cylinder carries out self-regulation according to the actual temperature of the external environment, the friction force and the impact force of the liquid metal and keeps the initial position unchanged;
s5, detecting the running position of the slide block through the displacement sensor 11, and after the slide block is at the set slide block fast-rotating slow-rotating position, turning the slide block into slow-rotating downlink and pressurizing, and meanwhile, carrying out fast-releasing energy through the energy accumulator;
s6, detecting the pressure of the slide block through the pressure sensor 15, and pressing the slide block to maintain the pressure when the pressure is increased to a set pressure value of the slide block;
s7, when the pressure maintaining is carried out on the slide block, the feeding cylinder is in a dynamic no-load positioning state, the punching cylinder is quickly jacked up, and the liquid metal is jacked into the upper die cavity;
s8, after the molten metal is completely flushed into the die cavity, slowly pressurizing, detecting the pressure value of the pressure of the stamping cylinder through the pressure sensor 15, and when the pressure value reaches the set pressure, enabling the stamping cylinder to enter a pressure maintaining stage;
s9, delaying for a certain time after the pressure maintaining of the stamping cylinder, wherein the time can be set through the human-computer interface 19; performing secondary ejection on the feeding cylinder, feeding the semi-formed molten metal in the mold cavity, and stopping acting and releasing pressure after feeding to a set position;
s10, after the pressure relief of the feeding cylinder is finished, simultaneously relieving the pressure of the sliding block and the punching cylinder, and after the pressure relief is finished, slowly opening the die of the punching cylinder and the sliding block; the punching cylinder detects the running position of the punching cylinder through the displacement sensor 11, and after the die and the slide block are opened to a set position, the punching cylinder rapidly returns to the initial position;
s11, slowly ejecting the four ejector cylinders, and ejecting the cooled workpiece in the die cavity to the outside of the die cavity;
s12, rapidly returning the slide block and the feeding cylinder to the initial position and stopping the motion;
s13, manually or mechanically fetching materials, and rapidly returning the ejection cylinder to the initial position and stopping; from the completion of this single cycle, the operation is repeated by returning to step S3 to perform the next product pressing operation.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (9)
1. The hydraulic machine and electrical control system based on the no-load feeding dynamic initial positioning function comprises an electrical cabinet (1), a special hydraulic machine body (2) for liquid metal punching, a special hydraulic machine hydraulic station (3) for liquid metal punching, a piano-type operating platform (13), a centralized operating panel (20), three high-precision displacement sensors (11), a pressure sensor (15), a limit travel switch (14), an electromagnetic valve group (16), a servo valve (17) and a proportional relief valve (18), and is characterized in that a motor starting circuit (4), a control transformer (5), a regulated power supply (6), a servo driver (8), a proportional amplifier (12) and a CPU module of a P L C are installed in the electrical cabinet (1) and connected with a hydraulic control module (11) of a hydraulic machine, the CPU module is connected with an I/O module (7), an analog input/output module, a man-machine interaction interface (touch screen), a motion control module (9) (HMC for controlling the hydraulic machine, the hydraulic station (3) comprises an energy accumulator and a servo motor, the servo operation platform (13) is arranged on the special hydraulic machine body (2) for liquid metal punching, the special hydraulic machine punching, the hydraulic machine, the hydraulic control module (2) is connected with a hydraulic control module (2), the hydraulic control module (11), the hydraulic control module of a hydraulic machine hydraulic control module (15) and a hydraulic control module of a hydraulic machine, the hydraulic control module of a hydraulic machine hydraulic control module of a hydraulic control module (15) for controlling the hydraulic machine, the hydraulic system is connected with the hydraulic system, the hydraulic system is connected with the hydraulic system, the hydraulic system of the hydraulic system, the hydraulic machine, the hydraulic system is connected with the hydraulic system, the hydraulic system of the hydraulic system, the hydraulic system of the hydraulic system, the hydraulic machine, the hydraulic system of the hydraulic machine, the hydraulic system of the hydraulic system is connected with the hydraulic system of the hydraulic machine, the hydraulic system of the hydraulic machine, the hydraulic system of the hydraulic machine, the hydraulic system of the hydraulic machine, the hydraulic system of the hydraulic system.
2. The hydraulic machine and electrical control system based on empty feeding dynamic initial positioning function as claimed in claim 1, wherein: the control transformer (5) provides AC220V control voltage, and the regulated power supply (6) provides DC24V voltage.
3. The hydraulic machine and electrical control system based on empty feeding dynamic initial positioning function as claimed in claim 1, wherein: control buttons of all mechanisms of the special hydraulic press body (1) for liquid metal stamping are distributed on the centralized operation panel (20).
4. The hydraulic machine and the electrical control system based on the no-load feeding dynamic initial positioning function as claimed in claim 1, wherein the human-computer interface (19) comprises state monitoring windows of various information of the liquid metal punching type hydraulic machine, formula picture windows of various mechanisms, process pictures of different products, windows for monitoring the current execution of the products pressed by the hydraulic machine and the real-time state of each mechanism, a fault alarm picture window for displaying and recording fault alarm content and alarm time, and a monitoring picture window for monitoring the on-off of each I/O point of P L C.
5. The hydraulic machine and electrical control system based on empty feeding dynamic initial positioning function as claimed in claim 1, wherein: the accumulator on the hydraulic station (3) of the special hydraulic press for liquid metal stamping is used for rapidly pressurizing the sliding block, so that the effect of shortening the die closing and pressurizing time of the sliding block is achieved.
6. The hydraulic machine and electrical control system based on empty feeding dynamic initial positioning function as claimed in claim 1, wherein: the motion controller module (9) is used for detecting the pressure and the position of a rod cavity and a rodless cavity of the compensating cylinder and controlling a servo valve (17) on the hydraulic station in real time according to feedback, so that the compensating cylinder can be positioned and can dynamically maintain the position both in no-load and load, and the compensating cylinder is not influenced by external friction force and other resistance forces (such as thermal expansion force).
7. The hydraulic machine and electrical control system based on empty feeding dynamic initial positioning function as claimed in claim 1, wherein: the servo driver (8) is used for regulating and controlling the pressure and the speed of each mechanism of the hydraulic machine, reduces the loss of electric energy and reduces the noise generated when the hydraulic machine works.
8. The hydraulic machine and electrical control system based on empty feeding dynamic initial positioning function as claimed in claim 1, wherein: the voltage type pressure range of the pressure sensor (15) is 0-10V, and the current type current range of the pressure sensor (15) is 4-20 MA.
9. The hydraulic machine and electrical control system based on empty feeding dynamic initial positioning function as claimed in claim 1, wherein the operation steps are as follows:
s1, starting the motor through the motor starting button (35); setting required parameters through parameter setting picture windows of all mechanisms of the special hydraulic machine for setting the liquid metal stamping;
s2, manually or mechanically pouring a fixed-temperature and fixed-quantity liquid metal into the cavity of the lower die;
s3, pressing the slide block descending button (24), enabling the slide block to descend rapidly, and driving the feeding cylinder to descend synchronously;
s4, when the feeding cylinder is driven to move downwards by the sliding block, the feeding cylinder starts to eject, and the position of the feeding cylinder in operation is detected by the displacement sensor (11); after the feeding cylinder descends to the set initial position, the no-load position is maintained; the compensation cylinder carries out self-regulation according to the actual temperature of the external environment, the friction force and the impact force of the liquid metal and keeps the initial position unchanged;
s5, detecting the running position of the sliding block through the displacement sensor (11), and after the sliding block is at the set sliding block fast-rotating slow-rotating position, turning the sliding block to slow-rotating downward and pressurizing, and meanwhile, carrying out fast-releasing energy through the energy accumulator;
s6, detecting the pressure of the slide block through the pressure sensor (15), and pressing the slide block to maintain pressure when the pressure is increased to a set pressure value of the slide block;
s7, when the pressure maintaining is carried out on the slide block, the feeding cylinder is in a dynamic no-load positioning state, the punching cylinder is quickly jacked up, and the liquid metal is jacked into the upper die cavity;
s8, after the molten metal is completely flushed into the die cavity, slowly pressurizing, detecting the pressure value of the pressure of the stamping cylinder through the pressure sensor (15), and when the pressure value reaches the set pressure, enabling the stamping cylinder to enter a pressure maintaining stage;
s9, delaying for a certain time after the pressure maintaining of the stamping cylinder, wherein the time can be set through the human-computer interface (19); performing secondary ejection on the feeding cylinder, feeding the semi-formed molten metal in the mold cavity, and stopping acting and releasing pressure after feeding to a set position;
s10, after the pressure relief of the feeding cylinder is finished, simultaneously relieving the pressure of the sliding block and the punching cylinder, and after the pressure relief is finished, slowly opening the die of the punching cylinder and the sliding block; the punching cylinder detects the running position of the punching cylinder through the displacement sensor (11), and after the punching cylinder and the sliding block are opened to a set position, the punching cylinder rapidly returns to the initial position;
s11, slowly ejecting the four ejector cylinders, and ejecting the cooled workpiece in the die cavity to the outside of the die cavity;
s12, rapidly returning the slide block and the feeding cylinder to the initial position and stopping the motion;
s13, manually or mechanically fetching materials, and rapidly returning the ejection cylinder to the initial position and stopping; from the completion of this single cycle, the operation is repeated by returning to step S3 to perform the next product pressing operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010227699.0A CN111408679A (en) | 2020-03-27 | 2020-03-27 | Hydraulic machine based on no-load feeding dynamic initial positioning function and electrical control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010227699.0A CN111408679A (en) | 2020-03-27 | 2020-03-27 | Hydraulic machine based on no-load feeding dynamic initial positioning function and electrical control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111408679A true CN111408679A (en) | 2020-07-14 |
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| CN109351933A (en) * | 2018-10-25 | 2019-02-19 | 广州和德轻量化成型技术有限公司 | Fluid die forging machine |
| CN109773152A (en) * | 2019-03-27 | 2019-05-21 | 金雅豪精密金属科技（深圳）股份有限公司 | Multiple feed casting forging Integral molding device for insoles and method |
| CN110871591A (en) * | 2019-11-26 | 2020-03-10 | 重庆江东机械有限责任公司 | High-speed forming press control system |
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| CN102602019A (en) * | 2012-03-22 | 2012-07-25 | 上海大学 | Low-power 200mm/s grade high-speed large-tonnage four-post single-acting hot-stamping oil press |
| CN103786365A (en) * | 2014-01-13 | 2014-05-14 | 合肥海德数控液压设备有限公司 | Pressure follow-up control electrical control system of hydraulic machine special for shell cover |
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| CN109351933A (en) * | 2018-10-25 | 2019-02-19 | 广州和德轻量化成型技术有限公司 | Fluid die forging machine |
| CN109773152A (en) * | 2019-03-27 | 2019-05-21 | 金雅豪精密金属科技（深圳）股份有限公司 | Multiple feed casting forging Integral molding device for insoles and method |
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