CN114953510A - Intelligent flexible composite material molding hydraulic machine and control method thereof - Google Patents
Intelligent flexible composite material molding hydraulic machine and control method thereof Download PDFInfo
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- CN114953510A CN114953510A CN202210708920.3A CN202210708920A CN114953510A CN 114953510 A CN114953510 A CN 114953510A CN 202210708920 A CN202210708920 A CN 202210708920A CN 114953510 A CN114953510 A CN 114953510A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/16—Control arrangements for fluid-driven presses
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The invention relates to an intelligent flexible composite material molding hydraulic press and a control method thereof, wherein a hardware system mainly comprises: the main machine body is a closed frame bearing forming internal force and is used as an installation carrier of a hydraulic actuator, a lower die and other devices; the hydraulic actuator is used for driving the movable workbench; the displacement sensor is used for measuring the displacement of the hydraulic actuator; the laser displacement sensor is used for measuring the displacement of the center of the movable workbench; the inclination angle sensor is used for measuring a two-dimensional inclination angle of the movable workbench; the force sensor is used for measuring the output force of the hydraulic actuator; the movable workbench is used for installing the upper die; and the electro-hydraulic control system is used for acquiring the physical state of the system, recording technological process parameters, executing an intelligent algorithm and realizing the control of the movement and output force of the hydraulic actuator. The method has the advantages of having excellent process adaptability, being beneficial to shortening the process development period of the composite material part and improving the production efficiency and the finished product quality of the part.
Description
Technical Field
The invention relates to a composite material hydraulic press, relates to a composite material molding hydraulic press and a control method thereof, and particularly relates to an intelligent flexible composite material molding hydraulic press and a control method thereof.
Background
With the rapid increase of the demands of the manufacturing industry fields such as automobiles and rail transit on the aspects of light weight, green material reduction, strength and yield improvement and the like of products, the technology of composite materials is rapidly advanced, and the forming process is changed day by day. Compared with the traditional metal material, the die pressing forming process of the composite material is more complex, has higher requirements on process parameter control, and has the characteristics of more working procedures, flexibility and easy change. How to make one composite material hydraulic press compatible with various different forming processes as much as possible, which can intelligently help product developers to efficiently complete process shaping and help product manufacturers to acquire more quality control data and upgrade processes is a hot point direction of technical development in the whole composite material part research and development and production system.
Disclosure of Invention
The invention aims to provide an intelligent flexible composite material molding hydraulic machine and a control method thereof, which can realize intelligent online optimization compensation on equipment structure deformation, workpiece size and workpiece density, thereby improving the development speed, production efficiency and finished product quality of composite material products.
The technical scheme of the invention is as follows:
the hardware system at least comprises;
the main frame body is a closed frame bearing forming internal force, can be a frame structure such as an integral gantry, a prestress combination, an upright post combination and the like, generally comprises structural units such as an upper cross beam, an upright post (or a pull rod and the upright post), a lower workbench and the like, and is also used as an installation carrier of a hydraulic actuator, a lower die and the like;
the hydraulic actuator is used for driving the movable workbench;
a displacement sensor for measuring the displacement of the hydraulic actuators ci ，i=1, 2, …, n, n is the number of hydraulic actuators;
laser displacement sensor for measuring the displacement of the center of the movable tables o ；
Tilt sensor for measuring two-dimensional tilt angle of movable tableθ x Andθ y ；
force sensor for measuring output force of hydraulic actuatorF ci ，i=1, 2, …, n, n is the number of hydraulic actuators;
the movable workbench is used for installing the upper die;
the electro-hydraulic control system is used for acquiring the physical state of the system, recording technological process parameters, executing an intelligent algorithm, realizing the control of the movement and output force of the hydraulic actuator, and has basic control functions of synchronous leveling control, movement-force composite control and the like for the hydraulic actuator.
Wherein: the static part of the hydraulic actuator is arranged on an upper cross beam of the main machine body, the movable part of the hydraulic actuator is connected with one end of a force sensor, the other end of the force sensor is connected with a movable workbench, and the movable part of the hydraulic actuator, the force sensor and the movable workbench belong to an assembly body; the movable detection end of the displacement sensor and the movable part of the hydraulic actuator belong to the same assembly body, and the static end is arranged on the corresponding static structure; the movable detection end of the laser displacement sensor is arranged in the center of the upper surface of the movable workbench, and the static end is correspondingly arranged on the lower plane of the upper cross beam of the main machine body; the tilt angle sensor is positioned in the center of the upper surface of the movable workbench; the electro-hydraulic control system is connected with the hydraulic actuator through a hydraulic loop and is electrically connected with the displacement sensor, the laser displacement sensor, the inclination angle sensor and the force sensor.
A control method of an intelligent flexible composite material molding hydraulic machine is characterized by comprising the following steps:
at least comprises the following steps:
step 1: and establishing a coordinate system. The center of the upper surface of the movable workbench is taken as an original point O, the left and right directions are taken as X-axis directions, the front and the rear directions are taken as Y-axis directions, an XOY orthogonal rectangular plane coordinate system is established on the upper surface of the movable workbench, the right direction is taken as the positive direction of the X axis, the front direction is taken as the positive direction of the Y axis, and the clockwise rotation direction along the axial direction is taken as the positive direction of an inclination angle. Suppose that the upper surface of the movable worktable is connected with 1 hydraulic actuator in the first quadrant of the coordinate system, and the projection coordinate of the connecting point C1 on the plane is (x c1 ，y c1 ）。
Step 2: and compensating the elastic deformation of the main machine body. A parallel pressure test pad is arranged between the movable workbench and the lower workbench of the main machine body, and the electro-hydraulic control system automatically controls the output force of each hydraulic actuatorF ci Any load is applied to the parallel pressure test cushion, and the electro-hydraulic control system records displacement sensingThe difference between the displacement sensor and the laser displacement sensor measured under no load and various loads is the deformation amount and corresponding output force of the main machine bodyF ci And the electro-hydraulic control system estimates the deformation quantity of the main machine body by using a table lookup interpolation method in the actual part pressing process so as to correct the measurement values of the displacement sensor and the laser displacement sensor.
And step 3: and (5) compensating the elastic deformation of the movable workbench. When the process test of the composite material part is carried out, the electro-hydraulic control system automatically records the displacement of the center of the upper surface of the movable workbench in the running process of the hydraulic presss o Displacement of each hydraulic actuators ci And output forceF ci Inclination of movable tableθ x Andθ y ，θ x is the angle of rotation of the movable table about the X-axis,θ y is the angle of rotation of the movable table about the Y-axis. If the movable worktable is a rigid body and does not generate stress deformation, the displacement of the hydraulic actuator at the point C1 is as follows
If the movable table is not deformed at point C1
. And the actual difference between the two
The amount of deformation of the movable table at point C1 is reflected. Simultaneously, the electro-hydraulic control system calculates the deformation quantityδ c1 Corresponding torque about the orthogonal axis C1OT c1 And establishing the amount of deformation and torqueδ c1 —T c1 Association map assuming displacement of movable table expected to bes oc Electrohydraulic control system for subsequent pressingEstimation using table lookup interpolationδ c1 And are prepared bys oc −δ c1 ) The compensation control is desirably performed as the displacement of the hydraulic actuator at the point C1.
And 4, step 4: and (5) compensating the thickness of the workpiece. After a certain number of composite material parts are manufactured, the deviation delta of the actual thickness of the parts from the standard thickness can be obtainedt c1 Distribution data, will deviate byt c1 The distributed data is uploaded to an electro-hydraulic control system, and the electro-hydraulic control system further automatically generates deltat c1 —δ c1 —T c1 The electro-hydraulic control system also utilizes a table lookup interpolation method to estimate delta in the subsequent pressing process by associating a mapping tablet c1 And with (a)s oc −δ c1 −Δt c1 ) Compensation control is desired as the displacement of the hydraulic actuator at the point C1.
And 5: and compensating the compactness of the workpiece. If the density distribution sample data of the workpiece is obtained, the corresponding output force recorded by the electrohydraulic control system is combinedF ci The forming force distribution meeting the compactness requirement can be obtained, the optimal forming force distribution data is retrieved through the electro-hydraulic control system, and the electro-hydraulic control system automatically distributes the output force of each hydraulic actuatorF ci The optimal forming force distribution is realized by utilizing the motion-force composite control function.
The control method of the intelligent flexible composite material molding hydraulic machine is suitable for the situation that the number of the hydraulic actuators is more than or equal to 2, the corresponding calculation and control methods of the hydraulic actuators at other positions can be obtained by analogy according to the steps, a plurality of hydraulic actuators keep running coordination under the synchronous control of an electro-hydraulic control system,δ c1 —T c1 association mapping table, Δt c1 —δ c1 —T c1 The association mapping table, the forming force distribution and the like can be continuously optimized on line in the test or production process.
Compared with the traditional product, the invention has the following beneficial effects:
1. the composite material molding hydraulic machine and the control method thereof have an automatic compensation function for the structural deformation of the hydraulic machine, and can reduce the influence of the structural rigidity of the hydraulic machine on the dimensional precision of a composite material part.
2. The composite material molding hydraulic machine and the control method thereof can utilize test or production data to carry out automatic compensation control on process parameters, and further improve the forming precision and the finished product quality of composite material parts.
3. The compensation control database for structural deformation, the size of a part and the density of the part, which is related to the control method, can be continuously updated and optimized in the test and production process, and if the technical scheme provided by the invention is adopted, both a process developer, a product producer and a quality manager can be effectively helped in the aspects of efficiency, quality and the like.
Drawings
FIG. 1 is a schematic diagram of the hydraulic machine of the present invention.
FIG. 2 is a schematic view of a planar coordinate system on the movable table of the present invention.
Fig. 3 is a schematic diagram of the elastic deformation of the movable table according to the present invention.
FIG. 4 is a schematic diagram of the thickness deviation of the article according to the present invention.
In fig. 1: the method comprises the following steps of 1-a main machine body, 101-an upper cross beam, 102-a stand column, 103-a lower workbench, 104-a parallel pressure testing pad, 2-a hydraulic actuator, 3-a displacement sensor, 4-a laser displacement sensor, 5-an inclination angle sensor, 6-a force sensor, 7-a movable workbench and 8-an electro-hydraulic control system.
In fig. 4: 701-manufacturing, 702-upper die and 703-lower die.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1, fig. 2, fig. 3, fig. 4, the hardware system of the present invention at least includes;
the main frame body 1 is a closed frame bearing forming internal force, can be a frame structure such as an integral gantry, a prestress combination, an upright post combination and the like, generally comprises structural units such as an upper cross beam 101, an upright post 102 (or a pull rod and an upright post), a lower workbench 103 and the like, and is also used as an installation carrier of a hydraulic actuator 2, a lower die 703 and other devices;
the hydraulic actuator 2 is used for driving the movable workbench 7;
a displacement sensor 3 for measuring the displacement of the hydraulic actuator 2s ci ，i=1, 2, …, n, n is the number of hydraulic actuators 2;
a laser displacement sensor 4 for measuring the displacement of the center of the movable table 7s o ；
A tilt sensor 5 for measuring a two-dimensional tilt angle of the movable table 7θ x Andθ y ；
a force sensor 6 for measuring the output force of the hydraulic actuator 2F ci ，i=1, 2, …, n, n is the number of hydraulic actuators 2;
a movable table 7 for mounting the upper die 702;
the electro-hydraulic control system 8 is used for acquiring the physical state of the system, recording technological process parameters, executing an intelligent algorithm, realizing control over the movement and output force of the hydraulic actuator 2, and having basic control functions such as synchronous leveling control and movement-force composite control for the hydraulic actuator 2.
Wherein: the static part of the hydraulic actuator 2 is arranged on an upper cross beam 101 of the main machine body 1, the movable part is connected with one end of a force sensor 6, the other end of the force sensor 6 is connected with a movable workbench 7, and the movable part of the hydraulic actuator 2, the force sensor 6 and the movable workbench 7 belong to an assembly body; the displacement sensor 3 is arranged in the structure body of the hydraulic actuator 2, the movable detection end of the displacement sensor 3 and the movable part of the hydraulic actuator 2 belong to an assembly body, and the static end is arranged at the static part of the hydraulic actuator 2; the movable detection end of the laser displacement sensor 4 is arranged at the center of the upper surface of the movable workbench 7, and the static end is correspondingly arranged on the lower plane of the upper cross beam 101 of the main machine body 1; the tilt angle sensor 5 is positioned in the center of the upper surface of the movable workbench 7; the electro-hydraulic control system 8 is connected with the hydraulic actuator 2 through a hydraulic loop and is electrically connected with the displacement sensor 3, the laser displacement sensor 4, the inclination angle sensor 5 and the force sensor 6.
Referring to fig. 2, fig. 3 and fig. 4, taking a hydraulic machine equipped with 4 hydraulic actuators 2 as an example, the control method of the present invention at least includes the following steps:
step 1: and establishing a coordinate system. Referring to fig. 2, with the center of the upper surface of the movable table 7 as an origin O, the left and right as X-axis directions, and the front and rear as Y-axis directions, an XOY orthogonal rectangular plane coordinate system is established on the upper surface of the movable table 7, with the right as the positive X-axis direction, with the front as the positive Y-axis direction, and with the clockwise rotation direction along the axial direction as the positive tilt angle direction. Suppose that the upper surface of the movable table 7 is connected with 1 hydraulic actuator 2 in the first quadrant of the coordinate system, and the projection coordinate of the connecting point C1 on the plane is (x c1 ，y c1 ）。
Step 2: the main body 1 is elastically deformed and compensated. A parallel pressure test pad 104 is arranged between the movable workbench 7 and a lower workbench 103 of the main machine body 1, and the electro-hydraulic control system 8 automatically controls the output force of each hydraulic actuator 2F ci Applying any load to the parallel pressure test pad 104, the electro-hydraulic control system 8 records the measurement difference values of the displacement sensor 3 and the laser displacement sensor 4 under no load and various loads, namely the deformation quantity and the corresponding output force of the main machine body 1F ci And in the data, the electro-hydraulic control system 8 generates a deformation quantity-load association mapping table, and the electro-hydraulic control system 8 estimates the deformation quantity of the main machine body 1 by using a table lookup interpolation method in the actual pressing process of the workpiece 701 so as to correct the measurement values of the displacement sensor 3 and the laser displacement sensor 4.
And step 3: the elastic deformation of the movable working table 7 is compensated. Referring to fig. 2 and 3, when a process test of a composite material part 701 is carried out, the electro-hydraulic control system 8 automatically records the displacement of the center of the upper surface of the movable workbench 7 in the operation process of the hydraulic presss o Displacement of each hydraulic actuator 2s ci And output forceF ci Inclination of the movable table 7θ x Andθ y ，θ x is the angle of rotation of the movable table 7 about the X-axis,θ y is the angle of rotation of the movable table 7 about the Y-axis. If the movable table 7 is assumed to be a rigid body without being deformed by a force, the displacement of the hydraulic actuator 2 at the point C1 is set to be
If the movable table 7 is not deformed at point C1
. And the actual difference between the two
The amount of deformation of the movable table 7 at point C1 is reflected. At the same time, the electro-hydraulic control system 8 calculates the deformation quantityδ c1 Corresponding torque about the orthogonal axis C1OT c1 ，T c1 Is calculated by the formula
The electro-hydraulic control system 8 establishing the amount of deformation and torqueδ c1 —T c1 Association map, assuming that the displacement of the movable table 7 is expected to bes oc In the subsequent pressing process, the electro-hydraulic control system 8 estimates by using a table lookup interpolation methodδ c1 And with (a)s oc − δ c1 ) Compensation control is desired as the displacement of the hydraulic actuator 2 at the point C1.
And 4, step 4: and (5) compensating the thickness of the workpiece. After a certain number of composite material parts 701 are manufactured, the deviation delta between the actual thickness and the standard thickness of the parts can be obtainedt c1 Distribution data, will deviate byt c1 The distribution data is uploaded to an electro-hydraulic control system 8, and the electro-hydraulic control system 8 further automatically generates deltat c1 —δ c1 —T c1 The electro-hydraulic control system 8 also estimates delta by using a table lookup interpolation method in the subsequent pressing process by using the associated mapping tablet c1 And with (a)s oc −δ c1 −Δt c1 ) Compensation control is desired as the displacement of the hydraulic actuator 2 at the point C1.
And 5: and compensating the compactness of the workpiece. If the density distribution sample data of the workpiece 701 is obtained, the corresponding output force recorded by the electro-hydraulic control system 8 is combinedF ci The forming force distribution meeting the compactness requirement can be obtained, the optimal forming force distribution data is retrieved through the electro-hydraulic control system 8, and the electro-hydraulic control system 8 automatically distributes the output force of each hydraulic actuator 2F ci The optimal forming force distribution is realized by utilizing the motion-force composite control function.
All the hydraulic actuators 2 keep running coordination under the synchronous control of the electro-hydraulic control system 8, the corresponding calculation and control methods of the hydraulic actuators 2 at the points C2, C3 and C4 can be obtained by analogy according to the steps, the method can be further popularized to any situation that the number of the hydraulic actuators 2 is more than or equal to 2,δ c1 —T c1 association mapping table, Δt c1 —δ c1 —T c1 The association mapping table, the forming force distribution and the like can be continuously optimized on line in the test or production process.
Claims (2)
1. An intelligent flexible composite material molding hydraulic press is characterized in that:
the hardware system at least comprises;
the main frame body (1) is a closed frame bearing forming internal force, or a frame structure of an integral gantry, a prestress combination and an upright post combination, and the frame structure comprises an upper cross beam, an upright post or a pull rod, an upright post and a lower workbench and is used as an installation carrier of a hydraulic actuator (2) and a lower die;
the hydraulic actuator (2) is used for driving the movable workbench (7);
a displacement sensor (3) for measuring the displacement of the hydraulic actuator (2)s ci ，i=1, 2, …, n, n is the number of hydraulic actuators (2);
a laser displacement sensor (4) for measuring the displacement of the center of the movable table (7)s o ；
A tilt sensor (5) for measuring the two-dimensional tilt angle of the movable table (7)θ x Andθ y ；
a force sensor (6) for measuring the output force of the hydraulic actuator (2)F ci ，i=1, 2, …, n, n is the number of hydraulic actuators (2);
the movable workbench (7) is used for installing an upper die;
the electro-hydraulic control system (8) is used for acquiring the physical state of the system, recording technological process parameters, executing an intelligent algorithm, realizing the control of the movement and output force of the hydraulic actuator (2), and having the basic control functions of synchronous leveling control and movement-force composite control on the hydraulic actuator (2);
wherein: the static part of the hydraulic actuator (2) is arranged on an upper cross beam of the main machine body (1), the movable part is connected with one end of a force sensor (6), the other end of the force sensor (6) is connected with a movable workbench (7), and the movable part of the hydraulic actuator (2), the force sensor (6) and the movable workbench (7) belong to an assembly body; the movable detection end of the displacement sensor (3) and the movable part of the hydraulic actuator (2) belong to the same assembly body, and the static end is arranged on a corresponding static structure; the movable detection end of the laser displacement sensor (4) is arranged at the center of the upper surface of the movable workbench (7), and the static end is correspondingly arranged on the lower plane of the upper cross beam of the main machine body (1); the tilt angle sensor (5) is positioned in the center of the upper surface of the movable workbench (7); the electro-hydraulic control system (8) is connected with the hydraulic actuator (2) through a hydraulic loop and is electrically connected with the displacement sensor (3), the laser displacement sensor (4), the inclination angle sensor (5) and the force sensor (6).
2. The intelligent flexible composite molding hydraulic machine as claimed in claim 1, wherein: a control method of an intelligent flexible composite material molding hydraulic press,
at least comprises the following steps:
step 1: establishing a coordinate system; establishing an XOY orthogonal right-angle plane coordinate system on the upper surface of the movable workbench (7) by taking the center of the upper surface of the movable workbench (7) as an original point O, the left and right directions as an X-axis direction and the front and rear directions as a Y-axis direction, the right direction as an X-axis positive direction, the front direction as a Y-axis positive direction and the clockwise rotation direction along the axial direction as an inclination positive direction; suppose that the upper surface of the movable workbench (7) is connected with 1 hydraulic actuator (2) in the first quadrant of the coordinate system, and the projection coordinate of the connecting point C1 on the plane is (x c1 ，y c1 ）；
Step 2: the elastic deformation compensation of the main machine body (1); a parallel pressure test pad is arranged between the movable workbench (7) and the lower workbench of the main machine body (1), and the electro-hydraulic control system (8) automatically controls the output force of each hydraulic actuator (2)F ci Any load is applied to the parallel pressure test pad, and the electro-hydraulic control system (8) records the deformation quantity and the corresponding output force of the main machine body (1) and the measurement difference value of the displacement sensor (3) and the laser displacement sensor (4) under no load and various loads respectivelyF ci Data, the electro-hydraulic control system (8) generates a deformation quantity-load association mapping table, and the electro-hydraulic control system (8) estimates the deformation quantity of the main machine body (1) by using a table lookup interpolation method in the actual workpiece pressing process so as to correct the measurement values of the displacement sensor (3) and the laser displacement sensor (4);
and step 3: the elastic deformation of the movable working table (7) is compensated; when the process test of the composite material workpiece is carried out, the electro-hydraulic control system (8) automatically records the displacement of the center of the upper surface of the movable workbench (7) in the running process of the hydraulic presss o Displacement of each hydraulic actuator (2)s ci And output forceF ci Inclination angle of the movable table (7)θ x Andθ y ，θ x is the rotation angle of the movable working table (7) around the X axis,θ y is the rotation angle of the movable working table (7) around the Y axis; if the movable working table (7) is assumed to be a rigid body and not to generate stress deformation, the displacement of the hydraulic actuator (2) at the point C1 is equal to
If the movable table (7) is not deformed at point C1
(ii) a And the actual difference between the two
The deformation quantity of the movable table (7) at the point C1 is reflected; simultaneously, the electro-hydraulic control system (8) calculates the deformation quantityδ c1 Corresponding torque about the orthogonal axis C1OT c1 And establishing the amount of deformation and torqueδ c1 —T c1 -a mapping table, assuming that the displacement of the movable table (7) is expected to bes oc The electrohydraulic control system (8) estimates the value by means of table lookup interpolation in the subsequent pressing processδ c1 And with (a)s oc − δ c1 ) Compensation control is performed as a displacement expectation of the hydraulic actuator (2) at the point C1;
and 4, step 4: compensating the thickness of the workpiece; after a certain number of composite material parts are manufactured, the deviation delta of the actual thickness of the parts from the standard thickness can be obtainedt c1 Distribution data, will deviate byt c1 The distributed data is uploaded to an electro-hydraulic control system (8), and the electro-hydraulic control system (8) further automatically generates deltat c1 —δ c1 —T c1 The electro-hydraulic control system (8) also estimates delta by using a table lookup interpolation method in the correlation mapping table in the subsequent pressing processt c1 And with (a)s oc −δ c1 −Δt c1 ) Compensation control is performed as a displacement expectation of the hydraulic actuator (2) at the point C1;
and 5: compensating the compactness of the workpiece; if the density distribution sample data of the workpiece is obtained, the corresponding output force recorded by the electro-hydraulic control system (8) is combinedF ci Data to obtain the forming force distribution meeting the compactness requirement, the optimal forming force distribution data is retrieved through the electro-hydraulic control system (8), and the electro-hydraulic control system (8) automatically distributes the output force of each hydraulic actuator (2)F ci The optimal forming force distribution is realized by utilizing the motion-force compound control function;
the control method of the intelligent flexible composite material molding hydraulic machine is suitable for the situation that the number of the hydraulic actuators (2) is more than or equal to 2, the corresponding calculation and control methods of the hydraulic actuators (2) at other positions can be obtained by analogy according to the steps, a plurality of hydraulic actuators (2) keep running coordination under the synchronous control of an electro-hydraulic control system (8),δ c1 —T c1 association mapping table, Δt c1 —δ c1 —T c1 And (4) associating a mapping table and forming force distribution, and continuously carrying out online optimization in the test or production process.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116100726A (en) * | 2023-04-13 | 2023-05-12 | 江苏云博智能科技有限公司 | Plastic body processing and forming mechanism based on hydraulic transmission |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116100726A (en) * | 2023-04-13 | 2023-05-12 | 江苏云博智能科技有限公司 | Plastic body processing and forming mechanism based on hydraulic transmission |
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