Hydraulic unbalance loading simulation system for four-corner leveling system and simulation method
Through the hydraulic simulated bias load system, the hydraulic cylinder and integrated oil circuit are used to form a stable simulated bias load, which solves the problem of unstable simulation bias load torque in the prior art, and realizes the accurate leveling accuracy judgment of the four-angle leveling system.
Patent Information
- Application Number
- CN202411948041.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-04-15
AI Technical Summary
The bias load simulation system of the existing four-angle leveling system is difficult to accurately data, and the simulated bias load torque is unstable, resulting in low stability and reliability in leveling accuracy judgment.
A hydraulic analog bias load system is designed, including hydraulic devices and four sets of simulation devices. Each set of simulation devices includes a hydraulic cylinder and an integrated oil circuit. A high-pressure relief valve, a high-pressure check valve and a pressure sensor are used to form a stable analog bias load, and accurate bias load data is provided through pressure sensor detection.
The stable simulated bias load of the four-angle leveling system is realized, providing direct and accurate bias load data, and improving the stability and reliability of leveling accuracy judgment.
Smart Images
Figure CN119825763A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the field of hydraulic technology, and in particular relates to a hydraulic simulated eccentric load system and a simulation method for a four-corner leveling system. Background Art
[0002] Large composite hydraulic press (hereinafter referred to as hydraulic press) is used for compression molding of composite products. In order to eliminate the damage to the precision of the molded product and the main machine of the hydraulic press caused by the large eccentric load caused by the asymmetry of the shape, structure and raw material position, a four-corner leveling system is required for leveling.
[0003] The existing overload simulation systems of the four-corner leveling system are basically lead block simulation devices and flexible mold simulation devices. The simulation process is difficult to digitize accurately. Both of these simulation devices cannot avoid the fact that during the compression of the simulation device, the resistance of the compressed material in the simulation device will continue to change due to different compression amounts. The resulting simulated overload torque is constantly changing, resulting in low stability and reliability of the precision test. It is also difficult to digitize the overload torque accurately, and it is difficult to determine the error between the leveling accuracy of the tested four-corner leveling system and the actual leveling accuracy under the maximum overload torque in the actual working conditions. Ultimately, it is difficult to accurately determine whether the leveling accuracy of the four-corner leveling system meets the leveling requirements under the overload torque required by the design. Summary of the invention
[0004] The purpose of the present invention is to provide a hydraulic simulated eccentric load system and simulation method for a four-corner leveling system, which can form a continuous and stable simulated eccentric load, and the simulated eccentric load can be adjusted, which can provide direct and accurate eccentric load data basis for analyzing and judging the leveling accuracy of the four-corner leveling system of the hydraulic press.
[0005] In order to achieve the above-mentioned purpose, a technical solution of the present invention is: a hydraulic simulated eccentric load system for a four-corner leveling system, comprising a hydraulic device and four groups of simulation devices, the hydraulic device is used to provide hydraulic pressure to the four groups of simulation devices; each group of the simulation devices comprises a hydraulic cylinder and an integrated oil circuit, the integrated oil circuit is used to connect the hydraulic cylinder and the hydraulic device; the integrated oil circuit comprises a high-pressure overflow valve, a high-pressure check valve and a pressure sensor; the hydraulic cylinder is respectively connected to the high-pressure overflow valve, the high-pressure check valve and the pressure sensor, the high-pressure check valve is used to introduce hydraulic pressure into the hydraulic cylinder in one direction; the cylinder body of the hydraulic cylinder is installed on the working table of the hydraulic press, and the four groups of hydraulic cylinders are arranged in a rectangular shape with the center of the working table as the base point; the driving end of the hydraulic cylinder can contact the lower plane of the hydraulic motor beam.
[0006] Furthermore, the hydraulic device includes a low-pressure return accumulator.
[0007] Furthermore, the hydraulic cylinder is a plunger type hydraulic cylinder.
[0008] Furthermore, the plunger action areas S of the four groups of hydraulic cylinders are equal, and the design pressures P of the integrated oil circuits are equal; the design total force is P 作用 , the total leveling force of the hydraulic press is P 总 ;P 作用 =P*4S,P 作用 ≥1.25P 总 ; Plunger stroke ≥ hydraulic press leveling cylinder stroke.
[0009] Furthermore, during the upward resetting process of the hydraulic cylinder, the pressure change ΔP on the hydraulic oil side from the starting point to the end point of the stroke is ≤0.5 MPa; and the maximum pressure of the hydraulic device is not greater than 1.5 MPa.
[0010] Furthermore, the distance between the four groups of hydraulic cylinders in the X direction is ΔX 1 , the distance in the Y direction is ΔY 1 ; The distance between the hydraulic press leveling cylinders in the X direction is ΔX 2 , the distance in the Y direction is ΔY 2 ; ΔX 1 ≥0.8ΔX 2 , ΔY 1 ≥0.8ΔY 2 .
[0011] Furthermore, the pressure adjustment range of the high-pressure relief valve is 12.6Mpa-63MPa.
[0012] Furthermore, the pressure sensor is a digital pressure sensor.
[0013] In order to achieve the above object, another technical solution of the present invention is: a hydraulic simulation method for a four-corner leveling system, which is implemented according to the above-mentioned hydraulic simulation eccentric load system for a four-corner leveling system; comprising the following steps:
[0014] The hydraulic motorized beam moves upward to above the leveling starting point;
[0015] The hydraulic pressure in the hydraulic device enters the hydraulic cylinder through the high-pressure one-way valve, and the output end of the hydraulic cylinder automatically returns to the position and rises to contact the lower plane of the hydraulic press beam;
[0016] The hydraulic motorized beam moves downward. During the downward movement of the hydraulic motorized beam, the output end of the hydraulic cylinder is passively pressed back to form a back pressure load. The size of the back pressure load is adjusted by a high-pressure relief valve. The pressure of the back pressure load is detected by a pressure sensor.
[0017] The simulated eccentric load moment of the hydraulic mobile beam during the downward movement is calculated according to the pressure value detected by the pressure sensor.
[0018] Further, the four groups of hydraulic cylinders are respectively the first hydraulic cylinder, the second hydraulic cylinder, the third hydraulic cylinder and the fourth hydraulic cylinder; the second hydraulic cylinder is located in the X direction of the first hydraulic cylinder, the fourth hydraulic cylinder is located in the Y direction of the first hydraulic cylinder, the third hydraulic cylinder is located in the Y direction of the second hydraulic cylinder and in the X direction of the fourth hydraulic cylinder; the distance between the first hydraulic cylinder and the second hydraulic cylinder is equal to the distance between the third hydraulic cylinder and the fourth hydraulic cylinder and is ΔX 1 ; The distance between the first hydraulic cylinder and the fourth hydraulic cylinder is equal to the distance between the second hydraulic cylinder and the third hydraulic cylinder and is ΔY 1 The output end effect area S of the four groups of hydraulic cylinders is equal, and the design pressure P of the integrated oil circuit is equal; the pressure values of the first hydraulic cylinder, the second hydraulic cylinder, the third hydraulic cylinder and the fourth hydraulic cylinder detected by the pressure sensor are P 第一液压缸 , P 第二液压缸 , P 第三液压缸 and P 第四液压缸 ;
[0019] X-direction eccentric load moment NX=(P 第二液压缸 -P 第一液压缸 )*ΔX 1 *S+(P 第四液压缸 -P 第三液压缸 )*ΔX 1 *S;
[0020] Y-direction eccentric load moment NY=(P 第四液压缸 -P 第一液压缸 )*ΔX 1 *S+(P 第三液压缸 -P 第二液压缸 )*ΔX 1 *S.
[0021] The beneficial effects of this technical solution are:
[0022] ① During the leveling process of the four-corner leveling system of the hydraulic press, the hydraulic cylinder of the hydraulic simulated eccentric load system of the present invention can form a continuous and stable simulated eccentric load.
[0023] ②The hydraulic simulated eccentric load adjustment can directly adjust the pressure of the high-pressure relief valve, and the adjustment is convenient and quick.
[0024] ③ The simulated eccentric load formed by the hydraulic simulated eccentric load system can be calculated through the pressure data detected by the pressure sensor, thereby realizing accurate dataization, and providing direct and accurate eccentric load data basis for analyzing and judging the leveling accuracy of the four-corner leveling system of the hydraulic press. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 The present invention is a structural schematic diagram of a hydraulic simulated eccentric load system for a four-corner leveling system. DETAILED DESCRIPTION
[0026] The following is further described in detail through specific implementation methods:
[0027] The figure marks in the drawings of the specification include: a first hydraulic cylinder 1, a first pressure sensor 2, a first high-pressure relief valve 3, a first high-pressure check valve 4, a second hydraulic cylinder 5, a second pressure sensor 6, a second high-pressure relief valve 7, a second high-pressure check valve 8, a third hydraulic cylinder 9, a third pressure sensor 10, a third high-pressure relief valve 11, a third high-pressure check valve 12, a fourth hydraulic cylinder 13, a third pressure sensor 14, a third high-pressure relief valve 15, a third high-pressure check valve 16, and a hydraulic device 17.
[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0029] The embodiment is basically as shown in the attached Figure 1As shown: A hydraulic simulated eccentric load system for a four-corner leveling system, including a hydraulic device and four groups of simulation devices, the hydraulic device 17 is used to provide hydraulic pressure to the four groups of simulation devices, the hydraulic device includes a low-pressure return accumulator, the pipeline connection between the low-pressure return accumulators is connected by a quick-change joint connection method, and the low-pressure return accumulator is specifically a bladder accumulator. The four groups of simulation devices are respectively a first simulation device A, a second simulation device B, a third simulation device C and a fourth simulation device D. The second simulation device B is located in the X direction of the first simulation device A, the fourth simulation device D is located in the Y direction of the first simulation device A, and the third simulation device C is located in the Y direction of the second simulation device B and in the X direction of the fourth simulation device D. Each group of simulation devices includes a hydraulic cylinder and an integrated oil circuit. The hydraulic cylinder adopts a plunger hydraulic cylinder, and the integrated oil circuit is used to connect the hydraulic cylinder and the hydraulic device. The integrated oil circuit includes a high-pressure relief valve, a high-pressure check valve and a pressure sensor; the hydraulic cylinder is connected to the high-pressure relief valve, the high-pressure check valve and the pressure sensor respectively, and the pressure sensor is specifically a digital display pressure sensor. The high-pressure one-way valve is used to introduce hydraulic pressure into the hydraulic cylinder in one direction; the cylinder body of the hydraulic cylinder is installed on the working table of the hydraulic press, and the four groups of hydraulic cylinders are arranged in a rectangular shape with the center of the working table as the base point; the driving end of the hydraulic cylinder can contact the lower plane of the hydraulic motor beam. Specifically, the first simulation device A includes a first hydraulic cylinder 1 and a first integrated oil circuit, and the first integrated oil circuit includes a first high-pressure relief valve 3, a first high-pressure one-way valve 4 and a first pressure sensor 2; the second simulation device B includes a second hydraulic cylinder 5 and a second integrated oil circuit, and the second integrated oil circuit includes a second high-pressure relief valve 7, a second high-pressure one-way valve 8 and a second pressure sensor 6; the third simulation device C includes a third hydraulic cylinder 9 and a third integrated oil circuit, and the third integrated oil circuit includes a third high-pressure relief valve 11, a third high-pressure one-way valve 12 and a third pressure sensor 10; the fourth simulation device D includes a fourth hydraulic cylinder 13 and a fourth integrated oil circuit, and the fourth integrated oil circuit includes a fourth high-pressure relief valve 15, a fourth high-pressure one-way valve 16 and a fourth pressure sensor 14.
[0030] The plunger action area S of the four groups of hydraulic cylinders is equal, and the design pressure P of the integrated oil circuit is equal (all 63MPa); the total design force is P 作用 , the total leveling force of the hydraulic press is P 总 ;P 作用 =P*4S,P 作用 ≥1.25P 总 ; Plunger stroke ≥ hydraulic press leveling cylinder stroke. During the hydraulic cylinder reset upward process, the hydraulic oil side pressure change ΔP from the stroke start to the stroke end is ≤0.5Mpa; the maximum pressure of the hydraulic device is not greater than 1.5MPa. The pressure adjustment range of the high-pressure relief valve is 12.6Mpa-63Mpa.
[0031] The distance between the first hydraulic cylinder 1 and the second hydraulic cylinder 5 is equal to the distance between the third hydraulic cylinder 9 and the fourth hydraulic cylinder 13 and is ΔX 1 ; The distance between the first hydraulic cylinder 1 and the fourth hydraulic cylinder 13 is equal to the distance between the second hydraulic cylinder 5 and the third hydraulic cylinder 9 and is ΔY 1 ; The distance between the hydraulic press leveling cylinders in the X direction is ΔX 2 , the distance in the Y direction is ΔY 2 ; ΔX 1 ≥0.8ΔX 2 , ΔY 1 ≥0.8ΔY 2 The pressure values of the first hydraulic cylinder 1, the second hydraulic cylinder 5, the third hydraulic cylinder and the fourth hydraulic cylinder 13 detected by the first pressure sensor 2, the second pressure sensor 6, the third pressure sensor 10 and the fourth pressure sensor 14 are P respectively. 第一液压缸 , P 第二液压缸 , P 第三液压缸 and P 第四液压缸 .
[0032] When the hydraulic cylinder returns to its original position and rises to its correct position, it must be in contact with the hydraulic movable beam ≥10mm before it descends to the starting point of leveling. If contact is impossible due to structural limitations, equal-height pads must be configured to meet this requirement.
[0033] The plunger of the hydraulic cylinder maintains contact during the passive pressure return process simulated by the eccentric load until the hydraulic movable beam descends to the end position of the leveling start and end point. After the end position of the leveling end point, the plunger stroke margin of the hydraulic cylinder is ≥10mm.
[0034] Embodiment 2
[0035] A hydraulic simulation method for a four-corner leveling system is implemented according to a hydraulic simulation eccentric load system for a four-corner leveling system in Embodiment 1; the method comprises the following steps:
[0036] The hydraulic motorized beam moves upward to a position above the leveling starting point (and ≤10mm);
[0037] The hydraulic pressure in the hydraulic device enters the hydraulic cylinder (1, 5, 9, 13) through the high-pressure one-way valve (4, 8, 12, 16), and the plunger of the hydraulic cylinder (1, 5, 9, 13) automatically returns and rises to contact the lower plane of the hydraulic machine beam;
[0038] The hydraulic motorized beam moves downward. During the downward movement of the hydraulic motorized beam, the plunger of the hydraulic cylinder (1, 5, 9, 13) is passively pressed back to form a back pressure load. The size of the back pressure load is adjusted by a high-pressure relief valve (3, 7, 11, 15); the pressure of the back pressure load is detected by a pressure sensor (2, 6, 10, 14);
[0039] The simulated eccentric load moment of the hydraulic mobile beam during the downward movement is calculated according to the pressure value detected by the pressure sensors (2, 6, 10, 14), and the calculation method is as follows:
[0040] X-direction eccentric load moment NX=(P 第二液压缸 -P 第一液压缸 )*ΔX 1 *S+(P 第四液压缸 -P 第三液压缸 )*ΔX 1 *S;
[0041] Y-direction eccentric load moment NY=(P 第四液压缸 -P 第一液压缸 )*ΔX 1 *S+(P 第三液压缸 -P 第二液压缸 )*ΔX 1 *S.
[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0043] The above is only an embodiment of the present invention. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.
Claims
1. A hydraulic simulated eccentric load system for a four-corner leveling system, characterized in that: It comprises a hydraulic device and four groups of simulation devices, wherein the hydraulic device is used to provide hydraulic pressure to the four groups of simulation devices; each group of simulation devices comprises a hydraulic cylinder and an integrated oil circuit, wherein the integrated oil circuit is used to connect the hydraulic cylinder and the hydraulic device; the integrated oil circuit comprises a high-pressure relief valve, a high-pressure check valve and a pressure sensor; the hydraulic cylinder is respectively connected to the high-pressure relief valve, the high-pressure check valve and the pressure sensor, wherein the high-pressure check valve is used to introduce hydraulic pressure into the hydraulic cylinder in one direction; the cylinder body of the hydraulic cylinder is installed on the working table of the hydraulic press, and the four groups of hydraulic cylinders are arranged in a rectangular shape with the center of the working table as the base point; the driving end of the hydraulic cylinder can contact the lower plane of the hydraulic motor beam.
2. The hydraulic simulated eccentric load system for a four-corner leveling system according to claim 1, characterized in that: The hydraulic device comprises a low-pressure return accumulator.
3. The hydraulic simulated eccentric load system for a four-corner leveling system according to claim 1, characterized in that: The hydraulic cylinder is a plunger type hydraulic cylinder.
4. The hydraulic simulated eccentric load system for a four-corner leveling system according to claim 3, characterized in that: The plunger action areas S of the four groups of hydraulic cylinders are equal, and the design pressures P of the integrated oil circuits are equal; the total design force is P 作用 , the total leveling force of the hydraulic press is P 总 ;P 作用 =P*4S,P 作用 ≥1.25P 总 ; Plunger stroke ≥ hydraulic press leveling cylinder stroke.
5. The hydraulic simulated eccentric load system for a four-corner leveling system according to claim 1, characterized in that: During the upward return of the hydraulic cylinder, the pressure change ΔP on the hydraulic oil side from the starting point to the end point of the stroke is ≤0.5 MPa; the maximum pressure of the hydraulic device is not greater than 1.5 MPa.
6. The hydraulic simulated eccentric load system for a four-corner leveling system according to claim 1, characterized in that: The distance between the four groups of hydraulic cylinders in the X direction is ΔX1, and the distance in the Y direction is ΔY1; the distance between the hydraulic press leveling cylinders in the X direction is ΔX2, and the distance in the Y direction is ΔY2; ΔX1≥0.8ΔX2, ΔY1≥0.8ΔY2.
7. The hydraulic simulated eccentric load system for a four-corner leveling system according to claim 6, characterized in that: The pressure adjustment range of the high-pressure relief valve is 12.6Mpa-63MPa.
8. The hydraulic simulated eccentric load system for a four-corner leveling system according to claim 1, characterized in that: The pressure sensor is a digital pressure sensor.
9. A hydraulic simulation method for a four-corner leveling system, characterized in that: The hydraulic simulated eccentric load system for a four-corner leveling system according to claim 1 is implemented; comprising the following steps: The hydraulic motorized beam moves upward to above the leveling starting point; The hydraulic pressure in the hydraulic device enters the hydraulic cylinder through the high-pressure one-way valve, and the output end of the hydraulic cylinder automatically returns to the position and rises to contact the lower plane of the hydraulic press beam; The hydraulic motorized beam moves downward. During the downward movement of the hydraulic motorized beam, the output end of the hydraulic cylinder is passively pressed back to form a back pressure load. The size of the back pressure load is adjusted by a high-pressure relief valve. The pressure of the back pressure load is detected by a pressure sensor. The simulated eccentric load moment of the hydraulic mobile beam during the downward movement is calculated according to the pressure value detected by the pressure sensor.
10. A hydraulic simulation method for a four-corner leveling system according to claim 9, characterized in that: The four groups of hydraulic cylinders are respectively the first hydraulic cylinder, the second hydraulic cylinder, the third hydraulic cylinder and the fourth hydraulic cylinder; the second hydraulic cylinder is located in the X direction of the first hydraulic cylinder, the fourth hydraulic cylinder is located in the Y direction of the first hydraulic cylinder, the third hydraulic cylinder is located in the Y direction of the second hydraulic cylinder and in the X direction of the fourth hydraulic cylinder; the distance between the first hydraulic cylinder and the second hydraulic cylinder is equal to the distance between the third hydraulic cylinder and the fourth hydraulic cylinder and is ΔX1; the distance between the first hydraulic cylinder and the fourth hydraulic cylinder is equal to the distance between the second hydraulic cylinder and the third hydraulic cylinder and is ΔY1; the output end action areas S of the four groups of hydraulic cylinders are equal, and the design pressures P of the integrated oil circuits are equal; the pressure values of the first hydraulic cylinder, the second hydraulic cylinder, the third hydraulic cylinder and the fourth hydraulic cylinder detected by the pressure sensors are P respectively 第一液压缸 , P 第二液压缸 , P 第三液压缸 and P 第四液压缸 ; X-direction eccentric load moment NX=(P 第二液压缸 -P 第一液压缸 )*ΔX1*S+(P 第四液压缸 -P 第三液压缸 )*ΔX1*S; Y-direction eccentric load moment NY=(P 第四液压缸 -P 第一液压缸 )*ΔX1*S+(P 第三液压缸 -P 第二液压缸 )*ΔX1*S.