CN111906228A - Self-adaptive forging control system and method for four-hammer radial forging hydraulic press - Google Patents
Self-adaptive forging control system and method for four-hammer radial forging hydraulic press Download PDFInfo
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- CN111906228A CN111906228A CN202010387708.2A CN202010387708A CN111906228A CN 111906228 A CN111906228 A CN 111906228A CN 202010387708 A CN202010387708 A CN 202010387708A CN 111906228 A CN111906228 A CN 111906228A
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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
- B21J9/00—Forging presses
- B21J9/10—Drives for forging presses
- B21J9/20—Control devices specially adapted to forging presses not restricted to one of the preceding subgroups
Abstract
The invention provides a self-adaptive forging control system and method for a four-hammer radial forging hydraulic press, which comprises a PLC (programmable logic controller) control system, an HMI (human machine interface), a logic motion controller, displacement sensors and laser thermometers, wherein the displacement sensors are arranged on hammer forging units, the laser thermometers are fixedly arranged above a frame, the number of the hammer forging units is four, each hammer forging unit comprises a hammer and a main cylinder, the main cylinder is communicated with an oil supply port of a hydraulic pump station through a pipeline, and the pipeline is provided with a servo proportional valve and a pressure sensor; the HMI human-computer interface, the logic motion controller, the pressure sensor and the laser thermometer are all in electric signal connection with the PLC control system, and the servo proportional valve and the displacement sensor are all in electric signal connection with the logic motion controller. The PLC control system is combined with each hammer head forging unit according to the model parameters of the workpiece product, so that the free switching between the batch forging of the middle-shaft workpiece and the special-shaped workpiece is realized.
Description
Technical Field
The invention belongs to the technical field of automatic control of free forging hydraulic presses, and particularly relates to a self-adaptive forging control system and method of a four-hammer radial forging hydraulic press.
Background
In the continuous multi-pass forging production process of the workpiece, the control of the forging quantity precision and the forging frequency is a crucial link for improving the performance of the forge piece. At present, the existing four-hammer radial forging hydraulic press needs four-hammer synchronous operation when forging, the finished workpiece type is mostly an axis type forging, the product type is relatively single, and the convenience of multi-hammer free combination can not be realized to process the opposite-type alloy forging.
In addition, the forging control method of the four-hammer radial forging hydraulic press mainly comprises two types of forging amount control and frequency control, the forging frequency and the forging amount are given by manual experience at present, equipment forging faults or alarms often occur in the actual forging finishing process due to the fact that the forging frequency cannot follow a set value, the pressure often reaches the maximum value of the forging press and cannot meet the requirement of the forging amount, and the phenomenon of 'vehicle blocking' occurs. After the problems occur, manual experience is required to try and modify the problems, the operation is complex, the accuracy and the stability are not high, the mechanical body is easy to damage, and the forging control self-adaptive capacity and the automation degree are relatively low.
The operation can not give self-adaptive given frequency and forging and pressing quantity values according to section parameters, and can not realize corresponding adjustment in real time according to corresponding changes of forging pressure and frequency in the forging process to ensure the performance quality of the forging.
Disclosure of Invention
The invention aims to provide a self-adaptive forging control system of a four-hammer radial forging hydraulic press, which overcomes the technical problems in the prior art.
The invention also aims to provide a self-adaptive forging control method for the four-hammer radial forging hydraulic press, which is used for dynamically matching the forging amount and the forging frequency of the current pass in a closed loop in real time according to the change of the forging pressure and the temperature of a forging piece in the forging process in a self-adaptive manner, ensuring the continuity of forging production and the accuracy and stability of forging control, and greatly improving the intelligent level of forging control of the four-hammer radial forging hydraulic press.
Therefore, the technical scheme provided by the invention is as follows:
a self-adaptive forging control system of a four-hammer radial forging hydraulic press comprises a PLC control system, an HMI (human machine interface), a logic motion controller, displacement sensors and laser thermometers, wherein a workpiece model and a workpiece process database are stored in the HMI, the laser thermometers are fixedly arranged above a frame, four hammer forging units are provided, each hammer forging unit comprises a hammer and a main cylinder, the displacement sensor is arranged in the main cylinder, the hammer is connected with the movable end of the main cylinder, the main cylinder is communicated with an oil supply port of a hydraulic pump station through a pipeline, and a servo proportional valve and a pressure sensor are arranged on the pipeline;
the HMI human-computer interface, the logic motion controller, the pressure sensor and the laser thermometer are all in electric signal connection with the PLC control system, and the servo proportional valve and the displacement sensor are all in electric signal connection with the logic motion controller.
Four tup forging units are last tup forging unit, lower tup forging unit, left tup forging unit and right tup forging unit respectively, left side tup forging unit, right tup forging unit symmetry are installed on the horizontal center line of frame, it forges the unit, down the tup forging unit symmetry and installs on the vertical center line of frame to go up the tup.
The workpiece model comprises the corresponding relation among the width, the thickness and the height of the workpiece to be forged, the number of hammers used and the product forging amount.
The process database comprises alloy parameters and physical properties of the workpiece to be forged and corresponding relations with forging frequency.
The HMI human-computer interface and the motion logic controller are communicated with the PLC through TCP/IP for data interaction.
The PLC control system comprises a controller, a digital quantity output module and an analog quantity input module, wherein the digital quantity output module and the analog quantity input module are in electric signal connection with the PLC, and the PLC is electrically connected with the motion logic controller.
A self-adaptive forging control method of a four-hammer radial forging hydraulic press adopts a self-adaptive forging control system of the four-hammer radial forging hydraulic press, and comprises the following steps:
step 1) inputting a model of a workpiece to be forged on an HMI (human machine interface), automatically screening the number of hammers required by forging the workpiece by a PLC (programmable logic controller) according to the width, thickness and height of the workpiece to be forged, and obtaining forging amount L, a forging pressure limit maximum value P and forging frequency F according to a workpiece process database;
step 2) feeding the forging amount L and the forging frequency F back to the control value of the logic motion controller by the PLC control system, starting forging in the current pass, and recording the workpiece temperature T1 measured by the laser thermodetector;
step 3) in the forging process, the PLC control system monitors the numerical value of the pressure sensor and the numerical value of the displacement sensor in the process that the hammer heads of each hammer head forging unit are pressurized to the forging amount in real time, adjusts the actual pressure value within the range of the forging pressure limit maximum value P and the forging amount of the current pass in real time, determines the forging frequency corresponding to the forging amount of the current pass after the forging amount of the current pass is determined, records the workpiece temperature T1 measured by the laser thermodetector, and the logic motion controller monitors the actual forging frequency change in unit time in real time and compares the actual forging frequency change with the forging frequency of the current pass until the actual forging frequency reaches the forging frequency of the current pass so as to finish the forging pass;
and 4) when the forging amount of the current pass does not reach the set forging amount L or the forging frequency does not reach the set forging frequency F and the temperature of the workpiece is higher than the temperature T1 of the workpiece, entering the next pass of circulation until the forging amount L and the forging frequency F are met, and finishing the forging of the workpiece after the forging circulation.
When the PLC control system monitors that the numerical value of the pressure sensor exceeds the forging pressure limit maximum value P and the forging amount does not reach a given value L, the PLC control system determines that the forging amount of the current pass is reduced to L1, the forging frequency is reduced to F1, meanwhile, the PLC controller transmits a new forging amount value L1 and a new forging frequency F1 to the logic motion controller, the logic motion controller controls the hammer to forge the workpiece, the forging of the current pass is completed, then, the PLC control system obtains the current temperature of the workpiece and compares the current temperature of the workpiece, when the current temperature of the workpiece is higher than the temperature T1 of the workpiece, the PLC control system controls the next forging cycle to be started until the forging amount L and the forging frequency F are met, the forging cycle is finished, and the workpiece forging is completed.
The workpieces comprise round-axis workpieces and anisotropic workpieces.
The invention has the beneficial effects that:
according to the self-adaptive forging control system of the four-hammer radial forging hydraulic machine, provided by the invention, the PLC control system is combined with each hammer forging unit according to the model parameters of a workpiece product, so that free switching between a middle-round shaft workpiece and an opposite-type workpiece in batch forging can be realized.
According to the method, the forging quantity and the forging frequency order value required by the workpiece are calculated by the PLC according to a workpiece model stored in the HMI, the forging quantity and the forging frequency order value of each pass are adaptively matched according to the forging pressure limit value and the frequency parameter value change, the adaptive value of the servo proportional valve is dynamically adjusted in a closed loop manner in real time, the accuracy of the performance quality of the forge piece and the stability of mechanical equipment are ensured, and the intelligent level of the adaptive forging control of the four-hammer radial forging hydraulic press is greatly improved.
Compared with the prior art, the invention has the advantages of reasonable design, excellent process, high intellectualization and self-adaption degree. The intelligent combination of each hammer head forging unit of the four-hammer head radial forging hydraulic press is realized, the corresponding forging and pressing amount is matched with the forging frequency in a self-adaptive mode, the diversity development of the types of the forging workpieces is promoted, the production efficiency of the forging hydraulic press and the performance quality of workpiece products are improved, and the labor and the production cost are greatly reduced.
In order to make the aforementioned and other objects of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
FIG. 1 is a schematic plan view of an embodiment of the present invention;
FIG. 2 is a functional block diagram of a PLC control system and a logic motion controller;
fig. 3 is a control flow diagram of the present invention.
In the figure:
description of reference numerals:
1. a left hammer forging unit; 2. a right hammer forging unit; 3. an upper hammer head forging unit; 4. a lower hammer forging unit; 5. a laser thermometer; 6. a PLC control system; 7. HMI human-machine interface; 8. a logical motion controller; 9. a workpiece; 10. a hydraulic pump station; 101. a left hammer head; 102. a left master cylinder; 103. a left hammer head main cylinder displacement sensor; 104. a left hammer head main cylinder pressure sensor; 105. a left hammer head main cylinder servo proportional valve; 201. a right hammer head; 202. a right master cylinder; 203. a right hammer head main cylinder displacement sensor; 204. a right hammer head main cylinder pressure sensor; 205. a servo proportional valve of a right hammer head main cylinder; 301. a hammer head is arranged; 302. an upper master cylinder; 303. a displacement sensor of an upper hammer head main cylinder; 304. an upper hammer head main cylinder pressure sensor; 305. an upper hammer head main cylinder servo proportional valve; 401. a lower hammer head; 402. a lower master cylinder; 403. a lower hammer head main cylinder displacement sensor; 404. a lower hammer head main cylinder pressure sensor; 405. lower hammer head master cylinder servo proportional valve.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
In the invention, the upper part, the lower part, the left part and the right part in the drawing are regarded as the upper part, the lower part, the left part and the right part of the adaptive forging control system of the four-hammer radial forging hydraulic machine described in the specification.
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Example 1:
the embodiment provides a self-adaptive forging control system of a four-hammer radial forging hydraulic machine, which comprises a PLC (programmable logic controller) control system 6, an HMI (human machine interface) 7, a logic motion controller 8, displacement sensors and laser thermometers 5, wherein the HMI 7 stores a workpiece 9 model and a workpiece 9 process database, the displacement sensors are arranged on hammer forging units, the laser thermometers 5 are fixedly arranged above a frame, the number of the hammer forging units is four, each hammer forging unit comprises four hammers and a master cylinder, the displacement sensors are arranged in the master cylinder, the hammers are connected with the movable end of the master cylinder, the master cylinder is communicated with an oil supply port of a hydraulic pump station 10 through a pipeline, and a servo proportional valve and a pressure sensor are arranged on the pipeline;
the HMI human-computer interface 7, the logic motion controller 8, the pressure sensor and the laser thermodetector 5 are all in electric signal connection with the PLC control system 6, and the servo proportional valve and the displacement sensor are all in electric signal connection with the logic motion controller 8.
Specifically, the working process or application process of the control system provided by the embodiment is as follows:
firstly, inputting a model of a workpiece 9 to be forged on an HMI 7, automatically screening the number of hammers used for forging the workpiece 9 by a PLC control system 6 according to the width, thickness and height of a section bar, and obtaining a forging amount L, a forging pressure limit maximum value P and an optimal forging frequency F parameter according to the type of alloy elements and process requirements of the workpiece 9; and then the PLC in the PLC control system 6 feeds back the forging amount and the forging frequency to the control value of the logic motion controller 8, and the automatic forging of the current pass is started.
In the forging process, the PLC monitors the change of each corresponding pressure sensor value in the process that each hammer head is pressurized to the forging amount in real time, when the pressure value exceeds the limit and the forging amount does not reach the given value L, each hammer head returns rapidly and correspondingly reduces the given forging amount value of the next hammer head to be changed into a new value, meanwhile, the PLC transmits the new forging amount value to the logic motion controller 8 to continue forging of the next hammer head, the PLC adjusts the forging amount value in real time according to the comparison of an actual pressure value and a pressure limit value in the circulating forging process of the current pass until the change of the actual pressure value is within the limit range, and the PLC can determine the forging amount L1 of the current pass.
Under the condition that the forging amount of the current pass is determined, the logic motion controller 8 monitors the actual forging frequency change in unit time in real time and compares the actual forging frequency change with the given frequency, when the given frequency is not reached, the given value of the forging frequency is correspondingly reduced and correspondingly enters the next hammer forging cycle, the PLC controller compares the actual forging frequency with the given value in real time in the cyclic forging process of the current pass and adjusts the given frequency in time until the actual forging frequency and the given value are consistent, and the PLC controller determines the forging frequency F1 of the current pass. The PLC controller records the temperature T1 of the workpiece 9 (the temperature of the workpiece 9 at the time of starting forging) at the time when the forging amount and the forging frequency are determined in this pass. After the forging of the current pass is completed, the PLC compares the forging quantity L1 and the forging frequency F1 of the current pass with the required forging quantity L and the required forging frequency F, if one of the forging quantity L and the forging frequency F does not meet the requirement of the workpiece 9 and the temperature of the current workpiece 9 is higher than the temperature T1 of the workpiece 9, the PLC control system 6 enters the next forging cycle, the forging of the pass is carried out in the non-stop cycle until the requirements of the forging quantity L and the forging frequency F are met, and the forging cycle is ended.
The motion logic controller is used for controlling the opening degree of the servo proportional valve corresponding to each hammer forging unit in a closed-loop manner in real time according to the displacement change of each hammer so as to realize the requirement of forging frequency. And a dynamic balance is always maintained between the forging amount given value of each hammer head used for forging in each forging pass and the pressurizing pressure value of the forging unit system, the forging frequency given value of each hammer head and the corresponding servo proportional valve.
Example 2:
on the basis of embodiment 1, this embodiment provides a four tup radial hydraulic forging press self-adaptation forge control system, and four tup forge units are last tup forge unit 3, lower tup forge unit 4, left tup forge unit 1 and right tup forge unit 2 respectively, left tup forge unit 1, right tup forge unit 2 symmetry and install on the horizontal central line of frame, it forges unit 3, lower tup and forges unit 4 symmetry and install on the vertical central line of frame to go up the tup.
As shown in fig. 1, the upper hammer forging unit 3 includes an upper hammer 301 and an upper main cylinder 302, and an upper hammer main cylinder displacement sensor 303 is installed in the upper main cylinder 302 and is used for monitoring the position change of the upper hammer 301 in real time; the lower hammer forging unit 4 comprises a lower hammer 401 and a lower main cylinder 402, wherein a lower hammer main cylinder displacement sensor 403 is installed in the lower main cylinder 402 and used for monitoring the position change of the lower hammer 401 in real time; the left hammer head forging unit 1 comprises a left hammer head 101 and a left main cylinder 102, wherein a left hammer head main cylinder displacement sensor 103 is installed in the left main cylinder 102 and used for monitoring the position change of the left hammer head 101 in real time; the right hammer forging unit 2 comprises a right hammer 201 and a right main cylinder 202, wherein a right hammer main cylinder displacement sensor 203 is installed in the right main cylinder 202 and used for monitoring the position change of the right hammer 201 in real time.
The upper hammer head 301, the lower hammer head 401, the left hammer head 101 and the right hammer head 201 are arranged on the frame at intervals of 90 degrees, and a workpiece 9 to be forged is arranged at the intersection of the axes of the four hammer heads. The upper main cylinder 302, the lower main cylinder 402, the left main cylinder 102 and the right main cylinder 202 are respectively communicated with an oil supply port of the hydraulic pump station 10 in parallel through pipelines, and an upper hammer head main cylinder pressure sensor 304 and an upper hammer head main cylinder servo proportional valve 305, a lower hammer head main cylinder pressure sensor 404 and a lower hammer head main cylinder servo proportional valve 405, a left hammer head main cylinder pressure sensor 104 and a left hammer head main cylinder servo proportional valve 105, a right hammer head main cylinder pressure sensor 204 and a right hammer head main cylinder servo proportional valve 205 are respectively arranged on each pipeline. And each hammer head forging unit controls the opening of the servo proportional valve to respond through a motion logic controller in a real-time closed-loop manner, so that hydraulic oil is controlled to enter and exit each main cylinder to drive the hammer head to do reciprocating motion of a pressurization return stroke.
Example 3:
on the basis of embodiment 1, the embodiment provides an adaptive forging control system for a four-hammer radial forging hydraulic press, and the workpiece 9 model comprises the corresponding relation among the width, the thickness and the height of the workpiece 9 to be forged, the number of hammers used and the product forging quantity.
According to the self-adaptive forging control system of the four-hammer radial forging hydraulic press, the PLC control system 6 is used for intelligently combining the number of hammers used for forging according to parameters such as the product shape of the workpiece 9, so that the round shaft workpiece can be finished and drawn out, and a special-shaped workpiece can be forged. And corresponding forging amount and forging frequency are adaptively matched in each pass of forging, so that the forging production efficiency and the performance quality of a workpiece 9 product are improved, and the labor cost and the production cost are greatly reduced.
Example 4:
on the basis of embodiment 1, the embodiment provides an adaptive forging control system for a four-hammer radial forging hydraulic press, and the process database comprises alloy parameters and physical properties of a workpiece 9 to be forged and corresponding relations between the alloy parameters and the physical properties and forging frequency.
And obtaining the forging amount L, the limited maximum value P of the forging pressure and the optimal forging frequency F according to the types of the alloy elements and the process requirements of the workpiece 9. In the forging process, the forging amount and the forging frequency of the current pass are dynamically matched in a closed loop self-adaptive manner in real time according to the change of the forging pressure and the temperature of the forged piece, the continuity of forging production and the accuracy and stability of forging control are ensured, and the intelligent level of forging control of the four-hammer radial forging hydraulic press is greatly improved.
Example 5:
on the basis of embodiment 1, the embodiment provides an adaptive forging control system for a four-hammer radial forging hydraulic machine, and the HMI human-machine interface 7 and the motion logic controller are in data interaction with a PLC controller through TCP/IP communication.
As shown in fig. 2, the data is shared by connecting the parts in series into a network through TCP/IP ethernet communication.
Example 6:
on the basis of embodiment 1, this embodiment provides a four-hammer radial forging hydraulic press self-adaptation forging control system, PLC control system 6 includes controller, digital output module and analog input module all with PLC controller electric signal connection, the PLC controller is connected with the motion logic controller electricity.
As shown in fig. 2, the digital output module is electrically connected to a pump head valve of the hydraulic pump station 10, the analog input module is electrically connected to an upper hammer head master cylinder pressure sensor 304, a lower hammer head master cylinder pressure sensor 404, a left hammer head master cylinder pressure sensor 104 and a right hammer head master cylinder pressure sensor 204, the PLC controller is electrically connected to the logic motion controller 8 through TCP/IP communication, and the logic motion controller 8 is electrically connected to an upper hammer head master cylinder servo proportional valve 305, a lower hammer head master cylinder servo proportional valve 405, a left hammer head master cylinder servo proportional valve 105, a right hammer head master cylinder servo proportional valve 205, an upper hammer head master cylinder displacement sensor 303, a lower hammer head master cylinder displacement sensor 403, a left hammer head master cylinder displacement sensor 103 and a right hammer head master cylinder displacement sensor 203.
In the embodiment, the PLC control system 6 mainly comprises a siemens 6ES 7315-2 PN/DP controller, and all the parts are connected in series to form a network by a TCP/IP ethernet communication method to share data. Feedback signals of the laser thermodetector 5 and pressure sensors (comprising an upper hammer head main cylinder pressure sensor 304, a lower hammer head main cylinder pressure sensor 404, a left hammer head main cylinder pressure sensor 104 and a right hammer head main cylinder pressure sensor 204) corresponding to each hammer head forging unit are all 4-20 ma current signals, and analog quantity input modules (the models are 6ES 7331-7 KF02-0AB 0) in the PLC control system 6 respectively convert the analog pressure signals into digital pressure signals and transmit the digital pressure signals to the controller. The feedback values of the displacement sensors and the opening degrees of the servo proportional valves are controlled by a motion logic controller RMC75E of Delta company, the output setting of a pump head valve of the hydraulic pump station 10 is completed by a digital quantity output module (model 6ES7322-1BL00-0AA 0) in the PLC control system 6, and the operating parameters of the HMI human-machine interface 7 and the logic motion controller 8 are subjected to data interaction with the PLC controller through TCP/IP communication.
Example 7:
the embodiment provides a self-adaptive forging control method for a four-hammer radial forging hydraulic machine, which adopts a self-adaptive forging control system for the four-hammer radial forging hydraulic machine and comprises the following steps:
step 1) inputting a model of a workpiece 9 to be forged on an HMI 7, automatically screening the number of hammers required by forging the workpiece 9 by a PLC control system 6 according to the width, thickness and height of the workpiece 9 to be forged, and obtaining forging amount L, a forging pressure limit maximum value P and forging frequency F according to a workpiece 9 process database;
step 2), the PLC control system 6 feeds back the forging amount L and the forging frequency F to the control value of the logic motion controller 8, and the forging of the current pass is started;
step 3) in the forging process, the PLC control system 6 monitors the numerical value of the pressure sensor and the numerical value of the displacement sensor in the process that the hammer heads of each hammer head forging unit are pressurized to the forging amount in real time, adjusts the actual pressure value in the range of the forging pressure limit maximum value P and the forging amount of the current pass in real time, determines the forging frequency corresponding to the forging amount of the current pass after the forging amount of the current pass is determined, records the temperature T1 of the workpiece 9 measured by the laser thermodetector 5, and the logic motion controller 8 monitors the actual forging frequency change in unit time in real time and compares the actual forging frequency change with the forging frequency of the current pass until the actual forging frequency reaches the forging frequency of the current pass to finish the forging of the current pass;
and 4) when the forging amount of the current pass does not reach the set forging amount L or the forging frequency does not reach the set forging frequency F, and the temperature of the workpiece 9 is higher than the temperature T1 of the workpiece 9 at the moment, entering the next pass of circulation until the forging amount L and the forging frequency F are met, ending the forging circulation, and finishing the forging of the workpiece 9.
When the forging amount of the current pass reaches the set forging amount L and the forging frequency reaches the set forging frequency F, the forging of the workpiece 9 is completed. If the forging amount of the current pass does not reach the set forging amount L or the forging frequency does not reach the set forging frequency F, and the temperature of the workpiece 9 at this time is less than the temperature T1 of the workpiece 9, the workpiece 9 needs to be forged after being re-melted. The purpose of achieving the set forging frequency is to realize the flatness of the forged piece and meet the product requirements.
Each pressure sensor is used for monitoring the forging pressure of each hammer, the numerical value of each pressure sensor and the change of a displacement sensor are monitored in real time by the PLC control system 6 for giving the forging quantity of the pass to be dynamically adjusted in real time, and the actual forging frequency numerical value change collected in the logic motion controller 8 is monitored in real time by the PLC control system 6 for giving the forging frequency of the pass to be dynamically adjusted in real time.
When the forging amount is given, the logical motion controller 8 gives the opening degree of each servo proportional valve, so that the running speed of each hammer driven by the extension of each main cylinder is controlled and determined. When the running speed is monitored to be reduced or smaller than the running speed corresponding to the opening degree of each servo proportional valve through each displacement sensor, the given forging amount cannot be realized, and the forging amount needs to be adjusted.
Example 8:
on the basis of embodiment 7, this embodiment provides a self-adaptive forging control method for a four-hammer radial forging hydraulic press, when the PLC control system 6 monitors that the value of the pressure sensor exceeds the forging pressure limit maximum value P and the forging amount does not reach the given value L, the PLC control system 6 determines to reduce the forging amount of the current pass to L1 and reduce the forging frequency to F1, and at the same time, the PLC controller transmits the new forging amount value L1 and the new forging frequency F1 to the logic motion controller 8, the logic motion controller 8 controls the hammers to forge the workpiece 9, so as to complete the forging of the current pass, then the PLC control system 6 obtains the current temperature of the workpiece 9 and compares the current temperature, when the current temperature of the workpiece 9 is greater than the temperature T1 of the workpiece 9, the PLC control system 6 controls to enter the next forging cycle until the forging amount L and the forging frequency F are satisfied, so as to complete the forging cycle, the forging of the workpiece 9 is completed. As shown in fig. 3.
After the forging of the current pass is completed, whether the next pass is carried out or not is determined by comparing the forging amount and the forging frequency with the process values and by the numerical change of the temperature of the workpiece 9.
Example 9:
on the basis of the embodiment 7, the embodiment provides an adaptive forging control method for a four-hammer radial forging hydraulic press, and the workpieces 9 comprise round-shaft workpieces and special-shaped workpieces.
According to the invention, the PLC control system 6 intelligently combines the number of hammers used for forging according to parameters such as the product shape of the workpiece 9, so that the round shaft workpiece can be finished and drawn out, and a special-shaped workpiece can be forged. And corresponding forging amount and forging frequency are adaptively matched in each pass of forging, so that the forging production efficiency and the performance quality of a workpiece 9 product are improved, and the labor cost and the production cost are greatly reduced.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.
Claims (9)
1. The utility model provides a four tup radial hydraulic forging press self-adaptation forge control system which characterized in that: the device comprises a PLC (programmable logic controller) control system (6), an HMI (human machine interface) (7), a logic motion controller (8), displacement sensors and laser thermometers (5), wherein the HMI (7) stores a workpiece (9) model and a workpiece (9) process database, the laser thermometers (5) are fixedly arranged above a rack frame, four hammer head forging units are arranged, each hammer head forging unit comprises a hammer head and a main cylinder, the displacement sensors are arranged in the main cylinders, the hammer heads are connected with the movable ends of the main cylinders, the main cylinders are communicated with an oil supply port of a hydraulic pump station (10) through pipelines, and servo proportional valves and pressure sensors are arranged on the pipelines;
the HMI human-computer interface (7), the logic motion controller (8), the pressure sensor and the laser thermodetector (5) are all in electric signal connection with the PLC control system (6), and the servo proportional valve and the displacement sensor are all in electric signal connection with the logic motion controller (8).
2. The adaptive forging control system of the four-hammer head radial forging hydraulic press according to claim 1, wherein: four tup forge the unit and forge unit (3), down tup forge unit (4), left tup forge unit (1) and right tup forge unit (2) for last tup respectively, left side tup forge unit (1), right tup forge unit (2) symmetry and install on the horizontal center line of frame, go up tup forge unit (3), down tup forge unit (4) symmetry and install on the vertical center line of frame.
3. The adaptive forging control system of the four-hammer head radial forging hydraulic press according to claim 1, wherein: the workpiece (9) model comprises the corresponding relation among the width, the thickness and the height of the workpiece (9) to be forged, the number of hammers used and the forging amount of the product.
4. The adaptive forging control system of the four-hammer head radial forging hydraulic press according to claim 1, wherein: the process database comprises alloy parameters and physical properties of the workpiece (9) to be forged and corresponding relations with forging frequency.
5. The adaptive forging control system of the four-hammer head radial forging hydraulic press according to claim 1, wherein: the HMI human-computer interface (7) and the motion logic controller are in data interaction with the PLC through TCP/IP communication.
6. The adaptive forging control system of the four-hammer head radial forging hydraulic press according to claim 1, wherein: the PLC control system (6) comprises a controller, a digital quantity output module and an analog quantity input module, wherein the digital quantity output module and the analog quantity input module are in electric signal connection with the PLC, and the PLC is electrically connected with the motion logic controller.
7. A self-adaptive forging control method of a four-hammer radial forging hydraulic press, which adopts the self-adaptive forging control system of the four-hammer radial forging hydraulic press as claimed in claim 1, and is characterized by comprising the following steps:
step 1) inputting a model of a workpiece (9) to be forged on an HMI (human machine interface) (7), automatically screening the number of hammers required by forging of the workpiece (9) by a PLC (programmable logic controller) according to the width, thickness and height of the workpiece (9) to be forged, and obtaining forging amount L, a forging pressure limit maximum value P and forging frequency F according to a workpiece (9) process database;
step 2), feeding the forging amount L and the forging frequency F back to the control value of the logic motion controller (8) by the PLC control system (6), starting forging in the current pass, and recording the temperature T1 of the workpiece (9) measured by the laser thermodetector (5);
step 3) in the forging process, the PLC control system (6) monitors the numerical value of the pressure sensor and the numerical value of the displacement sensor in the process that the hammers of each hammer forging unit are pressurized to the forging amount in real time, adjusts the actual pressure value in the range of the forging pressure limited maximum value P and the forging amount of the current pass in real time, determines the forging frequency corresponding to the forging amount of the current pass after the forging amount of the current pass is determined, records the temperature T1 of the workpiece (9) measured by the laser thermodetector (5), monitors the actual forging frequency change in unit time in real time by the logic motion controller (8) and compares the actual forging frequency change with the forging frequency of the current pass until the actual forging frequency reaches the forging frequency of the current pass, and the forging of the current pass is completed;
and 4) when the forging amount of the current pass does not reach the set forging amount L or the forging frequency does not reach the set forging frequency F, and the temperature of the workpiece (9) is higher than the temperature T1 of the workpiece (9), entering the next pass of circulation until the forging amount L and the forging frequency F are met, and finishing the forging of the workpiece (9) after the forging circulation is finished.
8. The self-adaptive forging control method for the four-hammer head radial forging hydraulic press according to claim 7, wherein the self-adaptive forging control method comprises the following steps: when the PLC control system (6) monitors that the numerical value of the pressure sensor exceeds the forging pressure limit maximum value P and the forging amount does not reach a given value L, the PLC control system (6) determines that the forging amount of the current pass is reduced to L1, the forging frequency is reduced to F1, meanwhile, the PLC controller transmits a new forging amount value L1 and the new forging frequency F1 to the logic motion controller (8), the logic motion controller (8) controls the hammer head to forge the workpiece (9), the forging of the current pass is completed, then the PLC control system (6) obtains the current temperature of the workpiece (9) and compares the current temperature, when the current temperature of the workpiece (9) is higher than the temperature T1 of the workpiece (9), the PLC control system (6) controls the next forging cycle to enter until the forging amount L and the forging frequency F are met, the forging cycle is completed, and the forging of the workpiece (9) is completed.
9. The self-adaptive forging control method for the four-hammer head radial forging hydraulic press according to claim 7, wherein the self-adaptive forging control method comprises the following steps: the workpieces (9) comprise round-axis workpieces and anisotropic workpieces.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113634699A (en) * | 2021-08-17 | 2021-11-12 | 天长市天舜金属锻造有限公司 | Metal component high-temperature forging control method and control system thereof |
| CN115229103A (en) * | 2022-06-28 | 2022-10-25 | 苏州虹逸重工科技有限公司 | Automatic servo numerical control forging line of horizontal double-end upset forging car semi-axis |
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- 2020-05-09 CN CN202010387708.2A patent/CN111906228A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113634699A (en) * | 2021-08-17 | 2021-11-12 | 天长市天舜金属锻造有限公司 | Metal component high-temperature forging control method and control system thereof |
| CN115229103A (en) * | 2022-06-28 | 2022-10-25 | 苏州虹逸重工科技有限公司 | Automatic servo numerical control forging line of horizontal double-end upset forging car semi-axis |
| CN115229103B (en) * | 2022-06-28 | 2023-06-23 | 苏州虹逸重工科技有限公司 | Automatic servo numerical control forging production line for horizontal double-head upsetting automobile half shaft |
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