CN111624094B - Flexible material curling test platform and method - Google Patents
Flexible material curling test platform and method Download PDFInfo
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- CN111624094B CN111624094B CN202010652157.8A CN202010652157A CN111624094B CN 111624094 B CN111624094 B CN 111624094B CN 202010652157 A CN202010652157 A CN 202010652157A CN 111624094 B CN111624094 B CN 111624094B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/26—Investigating twisting or coiling properties
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Abstract
The invention provides a curl test platform and a curl test method for flexible materials, comprising the following steps: the device comprises a frame, a sliding shaft motor, a curling shaft motor, a first torque sensor, a second torque sensor, a movable carrier, a curling platform and a tension sensor; the sliding shaft motor drives the movable carrier to move back and forth through the sliding shaft, a fixed shaft is arranged on the upper surface of the movable carrier, and one end of the flexible material is fixed by the fixed shaft; the curling platform is provided with a curling shaft and a curling shaft motor, the curling shaft is used for fixing the other end of the flexible material, and the curling shaft motor curls the flexible material; the tension sensor is used for measuring the tension of the flexible material; the output torque of the sliding shaft motor and the curling shaft motor is controlled by a control system. According to the invention, the stretching and curling of the flexible material are cooperatively controlled by the sliding shaft motor and the curling shaft motor, and the tension value of the flexible material is measured and fed back in real time by the tension sensor, so that the tension control of the flexible material is accurate, and the testing platform has higher applicability.
Description
Technical Field
The invention relates to the field of flexible material testing, in particular to a flexible material testing platform.
Background
The flexible material has excellent performance, can be turned and folded, reduces the product area, and has been widely applied to electronic products, such as mobile phone flexible screens, television flexible screens and the like. However, the service life of the electronic product is long, the quality requirement is high, and the flexibility and the service life of the flexible material are high, so that the flexible material is usually required to be tested for the curling and stretching capability of the flexible material under a given tensile force in the processing and production.
The flexible material curling and stretching test has quite high requirements on tension control, speed control and system monitoring of a test platform, the traditional test method is that a single motor curls the flexible material, tension is provided by a heavy object, the adjustment process is complex, the influence of system friction force on the flexible material is large, tension control is not accurate enough, the curling process is not fast and stable, hanging weight jumping and the like can be caused due to hanging weight inertia when acceleration and deceleration are too fast.
Disclosure of Invention
In order to solve the problems, the invention provides a flexible material curling test platform and a flexible material curling test method, which solve the technical problems of complex process and inaccurate tension control in flexible material curling and stretching test.
The technical scheme of the invention is as follows:
a curl test platform for flexible materials, comprising:
the machine frame comprises a machine frame body, wherein a machine frame table top is fixedly connected with a sliding shaft motor, and the sliding shaft motor is connected with a sliding shaft through a first torque sensor;
the bottom of the mobile carrier is connected with a sliding shaft of a sliding shaft motor, and the sliding shaft motor drives the mobile carrier to move back and forth through the sliding shaft; the upper surface of the movable carrier is provided with a fixed shaft, and one end of the flexible material is fixed by the fixed shaft;
the curling platform is arranged on the table top of the frame in a sliding manner, a curling shaft and a curling shaft motor are arranged on the curling platform, the curling shaft is parallel to the fixed shaft, the curling shaft is used for fixing the other end of the flexible material, and the output end of the curling shaft motor is connected with the curling shaft through a second torque sensor;
the tension sensor is arranged at one side of the curling platform far away from the movable carrying platform, one end of the tension sensor is fixed relative to the table surface of the rack, the other end of the tension sensor is connected to the curling platform, and the stress direction of the tension sensor is parallel to the moving direction of the movable carrying platform;
and the control system is respectively connected with the first torque sensor, the second torque sensor and the tension sensor.
The outer contour of the fixed shaft or the curling shaft is in a vortex shape, the starting point and the end point of the contour line of the outer contour form steps on the curling shaft, and the height of the steps is the same as the thickness of the curling material.
Wherein, the tolerance of the step height of the vortex outline and the thickness of the curled material is + -0.1 mm.
Wherein, the contour line of the vortex outer contour is an Archimedes spiral.
Wherein, be connected with elastic material between tension sensor other end and the crimping platform.
The sliding shaft is a threaded rod, a threaded through hole is formed in the side face of the lower end of the movable carrying platform, and the threaded through hole is matched with the threaded rod.
The upper surface of the movable carrier is provided with two first shaft seats, and two ends of the fixed shaft are respectively fixed on the first shaft seats; the curling platform is provided with two second shaft seats, and the curling shaft is fixed on the second shaft seats through bearings.
Wherein, a tension sensor support is vertically arranged on the table surface of the machine frame, is positioned on one side of the curling platform far away from the movable carrying platform, and one end of the tension sensor is connected on the tension sensor support while the other end is connected on the curling platform.
A method of curl testing a flexible material, comprising the steps of:
s1: setting a target value of the tension of the flexible material;
s2: two ends of the flexible material are respectively fixed on the rolling shaft and the fixed shaft;
s3: the control system controls the sliding shaft motor and the curling shaft motor to work, the curling shaft motor rotates to drive the curling shaft to curl or unwind the flexible material, and the sliding shaft motor rotates to enable the curling shaft and the fixed shaft to be relatively close to or far away from each other;
s4: the tension sensor measures the tension of the flexible material in real time, the measured tension value is fed back to the control system, the control system compares the tension value with a target value, and when the tension value deviates from the target value, the control system adjusts the output torque difference of the curling shaft motor and the sliding shaft motor so as to adjust the tension applied to the flexible material;
s5: and under the set tension target value of the flexible material, the curling shaft motor and the sliding shaft motor are matched with each other to repeatedly curl and unreel the flexible material by the curling shaft, and the curling times are counted.
Wherein, in step S4, when the tension value measured by the tension sensor in real time is greater than the target value, the difference of the output torque of the sliding shaft motor and the curling shaft motor is reduced; and when the tension value measured by the tension sensor in real time is smaller than the target value, increasing the difference of the output torque of the sliding shaft motor and the output torque of the crimping shaft motor.
The invention has the following beneficial effects:
1. according to the flexible material curling test platform, curling and stretching of the flexible material are controlled through the sliding shaft motor and the curling shaft motor, and the output torque of the sliding shaft motor and the output torque of the curling shaft motor are controlled and regulated through the first torque sensor, the second torque sensor and the tension sensor, so that the tension of the flexible material can be accurately controlled, the influence of hanging weight inertia is overcome, the tension response is rapid, and the testing accuracy is improved.
2. According to the flexible material curling test platform, the vortex-shaped curling shaft enables smooth transition when the flexible material is curled, and stress abrupt change is reduced, so that the actual service life of the flexible material is reflected.
3. According to the flexible material curl test platform, the elastic material is connected between the tension sensor and the curl platform, and buffers the tension sensor so as to prevent the tension sensor from violently vibrating during tension measurement and unstable measurement data.
4. According to the flexible material curl test platform, the tension of the flexible material is measured in real time through the tension sensor, the tension value is compared with the target value, when the tension value deviates from the target value, the control system adjusts the output torque difference of the curl shaft motor and the slide shaft motor to adjust the tension applied to the flexible material, the tension of the flexible material is controlled by adjusting the torque difference of the motor, the control algorithm is simple, the tension value of the flexible material can be kept to be the set target tension value, and the curl and tension control of the flexible material is accurate.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the structure of a rolling shaft;
the reference numerals are: 1-rack, 2-rack table top, 3-tension sensor support, 4-tension sensor, 5-flexible material, 6-reel axle, 7-second axle seat, 8-second torque sensor, 9-reel axle motor, 10-reel platform, 11-movable carrier, 12-first axle seat, 13-fixed axle, 14-movable guide rail, 15-sliding axle, 16-first torque sensor, 17-sliding axle motor.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the invention and structural, methodological, or functional modifications of these embodiments that may be made by one of ordinary skill in the art are included within the scope of the invention.
Referring to fig. 1-2, the invention provides a flexible material curl test platform, which comprises a frame 1, wherein a frame table top 2 is fixedly connected with a sliding shaft motor 17, and the sliding shaft motor 17 is connected with a sliding shaft 15 through a first torque sensor 16. The frame 1 is formed by splicing aluminum profiles, and the aluminum profiles are convenient to assemble and disassemble and can lighten the weight of the test platform. The first torque sensor 16 is used to measure the output torque of the sliding shaft motor 17.
The bottom of the movable carrier 11 is connected with a sliding shaft 15 of a sliding shaft motor 17, and the movable carrier 11 is driven by the sliding shaft motor 17 to move back and forth along the sliding shaft 15 through the sliding shaft 15. The two sides of the sliding shaft 15 are provided with the movable guide rails 14, and the bottom of the movable carrier 11 is provided with grooves or pulleys matched with the movable guide rails 14, so that the movable carrier 11 can move more stably. In a preferred embodiment, the moving rail 14 is provided on the moving stage 11 and a groove or pulley cooperating with the moving rail 14 is provided on the frame table 2. The slide shaft motor 17 serves as a power element, and converts the rotational motion into a linear motion of the moving stage 11 through the slide shaft 15. In a preferred embodiment, the combination of the sliding shaft motor 17 and the sliding shaft 15 may be replaced by a linear driving element capable of implementing linear motion, such as a telescopic rod, an electric push rod, a hydraulic cylinder, a pneumatic cylinder, etc., and the measuring element for sensing the output state of the linear driving element may be a measuring element such as a power sensor, a pressure sensor, an acceleration sensor, etc. The upper surface of the movable carrier 11 is provided with a fixed shaft 13, and the fixed shaft 13 fixes one end of the flexible material 5. In order to firmly fix the flexible material 5 on the fixed shaft 13, the flexible material 5 and the fixed shaft 13 are fixed by adhesion, and other fixing modes such as nails, clamping, magnetic compression joint and the like can be adopted for the flexible material 5 and the fixed shaft 13.
The curling platform 10 is slidably arranged on the frame table top 2, the curling platform 10 is provided with a curling shaft 6 and a curling shaft motor 9, the curling shaft 6 is parallel to the fixed shaft 13, the curling shaft 6 is used for fixing the other end of the flexible material 5, and the output end of the curling shaft motor 9 is connected with the curling shaft 6 through a second torque sensor 8. The direction of sliding of the crimping platform 10 is the same as or opposite to the moving direction of the moving stage 11. In order to stably set the crimping stage 10 on the rack deck 2 and to improve the compactness of the test stage, the crimping stage 10 shares the moving rail 14 with the moving stage 11. The second torque sensor 8 is used to measure the output torque of the curl shaft motor 9. The curl shaft motor 9 rotates the curl shaft 6 to curl the flexible material 5. The flexible material 5 is curled and stretched by movement of the curling stage 10 and the moving stage 11.
The tension sensor 4 is arranged on one side of the curling platform 10 far away from the movable carrying platform 11, one end of the tension sensor is fixed relative to the machine frame table top 2, the other end of the tension sensor is connected to the curling platform 10, and the stress direction of the tension sensor 4 is parallel to the moving direction of the movable carrying platform 11. The tension sensor 4 is used to measure the tension of the flexible material 5. The tension sensor 4 is an S-shaped tension sensor or a column-type tension sensor.
The control system is respectively connected with the first torque sensor 16, the second torque sensor 8 and the tension sensor 4 and is used for controlling the torque output of the sliding shaft motor 17 and the curling shaft motor 9. The control system can select a PLC, a computer, a microprocessor, an industrial personal computer or the like.
In a preferred embodiment, the outer contour of the crimp shaft 6 is in the form of a scroll, the start and end points of the contour line of the outer contour forming steps on the crimp shaft 6, the height of the steps being the same as the thickness of the crimp material. When the flexible material 5 is wound and fixed on the winding shaft 6, the winding starts from the step, and the step height is the same as the thickness of the curled material, so that the winding of the flexible material 5 can be smoothly transited, and the flexible material 5 is prevented from generating local stress abrupt change so as to reflect the real service life of the flexible material 5.
In a preferred embodiment, the tolerance of the step height of the scroll outer profile to the thickness of the curled material is + -0.1 mm. The tolerance of the step height of the vortex outer contour and the thickness of the curled material is within a certain range, so that the rolling shaft 6 keeps better processing economy, and the smooth transition of the curl of the flexible material 5 is not affected.
In a preferred embodiment, the contour of the vortex outer contour is an archimedes spiral. The Archimedes spiral processing technology is mature and easy to process. In a preferred embodiment, the contour line is a pascal-type blood vessel.
In a preferred embodiment, an elastic material is connected between the other end of the tension sensor 4 and the crimping platform 10. The elastic material is a spring or rubber, and when the flexible material 5 stretches, the elastic material buffers the tension sensor 4 so as to prevent the tension sensor 4 from violently vibrating, so that the measured data is unstable.
In a preferred embodiment, the sliding shaft 15 is a threaded rod, and a threaded through hole is formed in the side surface of the lower end of the movable carrier 11, and the threaded through hole is matched with the threaded rod. The threaded through hole is matched with the threaded rod, so that the movement of the movable carrier 11 is easy to control.
In a preferred embodiment, two first shaft seats 12 are provided on the upper surface of the movable carrier 11, two ends of the fixed shaft 13 are respectively fixed on the first shaft seats 12, and the fixed shaft 13 is stably installed through the first shaft seats 12, so that the flexible material 5 fixed on the fixed shaft 13 is prevented from shaking. The curling platform 10 is provided with two second shaft seats 7, the curling shaft 6 is fixed on the second shaft seats 7 through bearings, the curling shaft 6 is stably installed through the second shaft seats 7, and the curling shaft 6 can smoothly rotate on the second shaft seats 7 through the bearings.
In a preferred embodiment, a tension sensor support 3 is vertically disposed on the frame table 2 on the side of the crimping platform 10 remote from the mobile carrier 11, and tension sensors 4 are connected at one end to the tension sensor support 3 and at the other end to the crimping platform 10. The tension sensor bracket 3 facilitates the fixation of the tension sensor 4.
The working principle of the flexible material curl test platform is as follows:
s1: setting a target value of the tension of the flexible material 5;
s2: two ends of the flexible material 5 are respectively fixed on the rolling shaft 6 and the fixed shaft 13;
s3: the control system controls the sliding shaft motor 17 and the curling shaft motor 9 to work, the curling shaft motor 9 rotates to drive the curling shaft 6 to curl or unwind the flexible material 5, and the sliding shaft motor 17 rotates to enable the curling shaft 6 and the fixing shaft 13 to be relatively close to or far away from each other;
s4: the tension sensor 4 measures the tension of the flexible material 5 in real time and feeds back the measured tension value to the control system, the control system compares the tension value with the target value, and when the tension value deviates from the target value, the control system adjusts the output torque difference of the curl shaft motor 9 and the slide shaft motor 17 to adjust the tension applied to the flexible material 5: when the tension value measured by the tension sensor 4 in real time is larger than the target value, the output torque or acceleration of the sliding shaft motor 17 or the curling shaft motor 9 is reduced; when the tension value measured by the tension sensor 4 in real time is smaller than the target value, the output torque or the acceleration of the sliding shaft motor 17 or the curling shaft motor 9 is increased; further, when the tension value measured by the tension sensor 4 in real time is greater than the target value, the difference between the output torque values of the sliding shaft motor 17 and the crimping shaft motor 9 is reduced; when the tension value measured by the tension sensor 4 in real time is smaller than the target value, the difference between the output torque values of the sliding shaft motor 17 and the curling shaft motor 9 is increased;
s5: at the target value of the tension set by the flexible material 5, the curling shaft motor 9 and the sliding shaft motor 17 are matched with each other to repeatedly curl and unwind the flexible material 5 by the curling shaft 6, and the curling times are counted.
It should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is for clarity only, and that the skilled artisan should recognize that the embodiments may be combined as appropriate to form other embodiments that will be understood by those skilled in the art.
The above list of detailed descriptions is only specific to practical embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the spirit of the present invention should be included in the scope of the present invention.
Claims (7)
1. A curl test platform for flexible materials, comprising:
the device comprises a frame (1), wherein a frame table top (2) is fixedly connected with a sliding shaft motor (17), and the sliding shaft motor (17) is connected with a sliding shaft (15) through a first torque sensor (16);
the mobile carrier (11), the bottom of the mobile carrier (11) is connected with a sliding shaft (15) of a sliding shaft motor (17), and the sliding shaft motor (17) drives the mobile carrier (11) to move back and forth through the sliding shaft (15); the two sides of the sliding shaft (15) are provided with movable guide rails (14), and the bottom of the movable carrier (11) is provided with grooves or pulleys matched with the movable guide rails (14); the upper surface of the movable carrying platform (11) is provided with a fixed shaft (13), and one end of the flexible material (5) is fixed by the fixed shaft (13);
the curling platform (10) is arranged on the rack table top (2) in a sliding manner, a curling shaft (6) and a curling shaft motor (9) are arranged on the curling platform (10), the curling shaft (6) is parallel to the fixed shaft (13), the curling shaft (6) is used for fixing the other end of the flexible material (5), and the output end of the curling shaft motor (9) is connected with the curling shaft (6) through a second torque sensor (8);
the tension sensor (4) is arranged on one side of the curling platform (10) far away from the movable carrying platform (11), one end of the tension sensor is fixed relative to the rack table top (2), the other end of the tension sensor is connected to the curling platform (10), and the stress direction of the tension sensor (4) is parallel to the moving direction of the movable carrying platform (11);
the control system is respectively connected with the first torque sensor (16), the second torque sensor (8) and the tension sensor (4);
the outer contour of the curling shaft (6) is in a vortex shape, the starting point and the end point of the contour line of the outer contour form steps on the curling shaft (6), and the height of the steps is the same as the thickness of the curling material;
the tolerance between the step height of the vortex outer contour and the thickness of the curled material is +/-0.1 mm;
the contour line of the outer contour of the vortex is an Archimedes spiral.
2. A flexible material crimping test platform as claimed in claim 1, wherein an elastic material is connected between the other end of the tension sensor (4) and the crimping platform (10).
3. The flexible material curl test platform of claim 1, wherein the sliding shaft (15) is a threaded rod, and a threaded through hole is formed in a side surface of the lower end of the movable carrier (11), and the threaded through hole is matched with the threaded rod.
4. The flexible material curl test platform according to claim 1, wherein two first shaft seats (12) are provided on the upper surface of the movable carrier (11), and both ends of the fixed shaft (13) are respectively fixed on the first shaft seats (12); two second shaft seats (7) are arranged on the curling platform (10), and the curling shaft (6) is fixed on the second shaft seats (7) through bearings.
5. The flexible material curl test platform of claim 1, wherein a tension sensor holder (3) is vertically disposed on the frame table top (2), on a side of the curl platform (10) away from the moving stage (11), one end of the tension sensor (4) is connected to the tension sensor holder (3), and the other end is connected to the curl platform (10).
6. A testing method using the flexible material curl testing platform of any of claims 1-5, comprising:
s1: setting a target value of the tension of the flexible material (5);
s2: two ends of the flexible material (5) are respectively fixed on the rolling shaft (6) and the fixed shaft (13);
s3: the control system controls the sliding shaft motor (17) and the curling shaft motor (9) to work, the curling shaft motor (9) rotates to drive the curling shaft (6) to curl or unwind the flexible material (5), and the sliding shaft motor (17) rotates to enable the curling shaft (6) and the fixing shaft (13) to be relatively close to or far away from each other;
s4: the tension sensor (4) measures the tension of the flexible material (5) in real time and feeds back the measured tension value to the control system, the control system compares the tension value with a target value, and when the tension value deviates from the target value, the control system adjusts the output torque difference of the curling shaft motor (9) and the sliding shaft motor (17) so as to adjust the tension applied to the flexible material (5);
s5: under the set tension target value of the flexible material (5), the curling shaft motor (9) and the sliding shaft motor (17) are matched with each other to repeatedly curl and unreel the flexible material (5) by the curling shaft (6), and the curling times are counted.
7. The test method of a curl test platform of flexible material according to claim 6, wherein in step S4, when the tension value measured by the tension sensor (4) in real time is greater than the target value, the difference in output torque of the sliding shaft motor (17) and the curl shaft motor (9) is reduced; when the tension value measured by the tension sensor (4) in real time is smaller than the target value, the difference of the output torque of the sliding shaft motor (17) and the output torque of the crimping shaft motor (9) is increased.
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| CN202010652157.8A CN111624094B (en) | 2020-07-08 | 2020-07-08 | Flexible material curling test platform and method |
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| CN109887419A (en) * | 2019-04-24 | 2019-06-14 | 京东方科技集团股份有限公司 | A kind of display device |
| CN209591360U (en) * | 2019-04-24 | 2019-11-05 | 京东方科技集团股份有限公司 | A kind of display device |
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| CN108513613A (en) * | 2017-03-28 | 2018-09-07 | 深圳市柔宇科技有限公司 | Flexible material static state crimps measurement jig and method |
| CN109520714B (en) * | 2018-11-13 | 2020-11-20 | 京东方科技集团股份有限公司 | Crimping equipment and flexible screen crimping device |
| CN109872639B (en) * | 2019-04-25 | 2021-04-20 | 京东方科技集团股份有限公司 | Rollable display device |
| CN110118697A (en) * | 2019-05-16 | 2019-08-13 | 云谷（固安）科技有限公司 | Flexible screen body test device and its test method |
| CN111122132B (en) * | 2020-01-10 | 2022-04-15 | 昆山国显光电有限公司 | Flexible screen testing device |
| CN111208020B (en) * | 2020-01-13 | 2022-12-13 | 昆山国显光电有限公司 | Testing arrangement of flexible screen |
| CN111175144B (en) * | 2020-01-22 | 2023-02-17 | 合肥维信诺科技有限公司 | Curl test method and apparatus |
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| TWM553802U (en) * | 2017-04-18 | 2018-01-01 | Iboson Technology Co Ltd | System for testing warpage of flexible substrate |
| CN109887419A (en) * | 2019-04-24 | 2019-06-14 | 京东方科技集团股份有限公司 | A kind of display device |
| CN209591360U (en) * | 2019-04-24 | 2019-11-05 | 京东方科技集团股份有限公司 | A kind of display device |
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