CN111307615A

CN111307615A - Bending test device

Info

Publication number: CN111307615A
Application number: CN202010258385.7A
Authority: CN
Inventors: 李喜民; 丁兴立
Original assignee: Suzhou Bofanxi Technology Co Ltd
Current assignee: Suzhou Bofanxi Technology Co Ltd
Priority date: 2020-04-03
Filing date: 2020-04-03
Publication date: 2020-06-19

Abstract

A bending test device belongs to the field of test equipment for flexible devices and materials. The invention aims to solve the technical problem that the test result and the precision are poor due to the fact that the bending test fixture generates stress to act on a bending test sample in the bending process. The movable mounting plate is fixedly arranged on the base, the movable mounting plate is rotatably connected with the fixed mounting plate, a slide rail is arranged on the back surface of the movable mounting plate, the driving unit is arranged on the support rod, a joint bearing seat is arranged on the support rod through a joint bearing, and the joint bearing seat is matched with the slide rail through a slide block to realize the rotation of the movable mounting plate relative to the fixed mounting plate. The invention has the advantages of ingenious structure and convenient operation, and is suitable for popularization and use.

Description

Bending test device

Technical Field

The invention relates to a bending test device, and belongs to the field of test equipment for flexible devices and materials.

Background

The flexible display is made of soft materials, can realize a bent display device, and is widely applied to portable electronic equipment and mobile terminals due to the characteristics of lightness, thinness, low power consumption and bending. Since the bending resistance of the flexible device and the material directly affects the lifetime of the display, the bending resistance of the flexible screen, the film material and the solid model needs to be tested and evaluated.

According to the traditional bending test equipment, a motion curve of a bending process of a sample in an ideal state is simulated to manufacture a guide rail, so that the motion curve is the same as the actual condition during bending test, and the influence of external stress is reduced. Because the thickness, the bending radius, the bending form and other factors of the test sample in the bending process all influence the motion curve of the bending process, and the guide rail of the test equipment is designed according to the simulation curve, the guide rail of the bending test needs to be replaced to meet different bending test requirements.

Meanwhile, the conventional bending test device usually adopts a hinge-type bending test mode, such as a bending test device disclosed in CN209400335U, the device includes a motor, the motor is connected with a first support plate to drive the first support plate to rotate relative to a second support plate, and the motor is connected with a fixed shaft of the first support plate, the motor directly drives the fixed shaft to act on the support plate, so that the torque of the motor directly acts on the rotating shaft, and the fixed connection mode adopted by the rotating shaft and the support plate causes a stress to be generated between the rotating shaft and the first support plate, and because the bending test is performed, a plurality of tests are required, such as a bending rate of 1-60 times/minute and a test frequency of 1-2000000 times, under the plurality of bending, the stress cannot be effectively released, and finally acts on the sample, and the external stress acting on the sample finally affects the test result of the sample, the test result is inaccurate, and the whole test process loses the original bending test significance.

In conclusion, the existing guide rail bending test equipment has the problems of easy generation of external stress in the test process, inaccurate test result, poor universality and low efficiency, so that the improvement of the bending test equipment has the problems of avoiding the generation of the external stress in the test process, improving the universality, simplifying the operation and improving the test efficiency, and is urgently needed to be solved.

Disclosure of Invention

The present invention has been developed in order to reduce the technical problems of poor accuracy and test results caused by the stress generated by the bending test fixture during the bending process on the bending test sample, and a brief summary of the present invention is provided below to provide a basic understanding of some aspects of the present invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to determine the key or critical elements of the present invention, nor is it intended to limit the scope of the present invention.

The technical scheme of the invention is as follows:

the utility model provides a bending test device, includes base, bracing piece, movable mounting panel, fixed mounting panel, drive unit, fixed mounting panel fixed mounting is on the base, and movable mounting panel rotates with fixed mounting panel to be connected, and movable mounting panel's back mounted has the slide rail, and drive unit establishes the installation with the bracing piece, installs joint bearing frame through joint bearing on the bracing piece, and joint bearing frame passes through the slider and realizes the rotation of movable mounting panel relatively fixed mounting panel with the slide rail cooperation.

The utility model provides a testing arrangement buckles, includes base, bracing piece, movable mounting panel, fixed mounting panel, drive unit, and fixed mounting panel fixed mounting is on the base, and movable mounting panel rotates with fixed mounting panel to be connected, and movable mounting panel's back mounted has the slide rail, installs the slider on the slide rail, installs joint bearing frame on the slider, and the bracing piece passes through joint bearing and installs in joint bearing frame, and drive unit and bracing piece set up the installation.

Preferably: the driving unit comprises a supporting seat and a power arm, the supporting seat is fixedly installed on the base, one end of the power arm is installed in the supporting seat through a bearing and a rotating shaft, and the other end of the power arm is fixedly installed with the supporting rod.

Preferably: the fixed mounting plate is provided with an electromagnet, and the movable mounting plate is provided with an absorption block.

Preferably: the both sides of fixed mounting panel fixed mounting respectively have articulated piece, are provided with first supporting shaft, first slide and second slide on the articulated piece, be provided with on the movable mounting panel respectively with the third slide of first supporting shaft looks adaptation, with the second back shaft of first slide looks adaptation, with the third back shaft of second slide looks adaptation.

Preferably: the hinge piece is a semicircular hinge piece, and the first supporting shaft is fixed at the circle center of the semicircular hinge piece.

Preferably: the movable mounting plate and the fixed mounting plate are provided with two strip holes which are arranged in parallel, and the strip holes are internally provided with clamping strips.

Preferably: the slide rail is installed at the back of the movable mounting plate along the moving direction of the movable mounting plate, and after the slide rail is installed, the slide rail is in a vertical state with the axis of the support rod in space.

The invention has the following beneficial effects:

1. the PLC control unit outputs an electric signal to the driving unit, the driving unit drives the power arm to swing, a supporting rod connected with the power arm is driven to swing along with the power arm, the joint bearing seat and the movable mounting plate are driven to turn over, a sliding rail is arranged on the back of the movable mounting plate, a sliding block is arranged on the sliding rail in a matching mode, the sliding block is fixed on the joint bearing seat, and the supporting rod penetrates through the joint bearing and is arranged on the bearing seat;

2. the bending process in practical application can be completely simulated through the movement of the guide rail and the rotation of the joint bearing, so that a test sample is tested without the influence of external stress;

3. in the actual test process, after sample parameters and test requirements are set, the movable mounting plate moves along the sliding guide rail to adjust the position in the bending process, the angle is adjusted by rotating around the support rod, the position and the angle are adjusted in multiple dimensions, the actual application state is completely simulated, the sample is not influenced by external stress in the test process, and meanwhile, the joint bearing can enable the movable mounting plate to generate micro torsion to prevent the stress action in the bending process.

4. The fixture disclosed by the invention can be clamped and installed on the fixed installation plate and the movable installation plate through the clamping strips, different test requirements can be met by replacing different Mockup/fixtures, the fixture has self-adaptive capacity for Mockup/treatment with different thicknesses, the checking operation after the installation plates are disassembled and replaced is avoided, and the universality and the convenience in operation of equipment are improved.

Drawings

FIG. 1 is a perspective view of a bend testing apparatus;

FIG. 2 is a perspective view of a joint bearing block;

FIG. 3 is an installation perspective view of the fixed mount and the movable mount;

FIG. 4 is an enlarged view at A in FIG. 3;

FIG. 5 is an enlarged view at B in FIG. 3;

FIG. 6 is a schematic view showing the installation relationship of the clamping bar on the fixed mounting seat;

FIG. 7 is an enlarged schematic view of the joint bearing block at the movable mounting plate;

in the figure, 1-a base, 2-a supporting seat, 3-a power arm, 4-a supporting rod, 5-a joint bearing, 6-a joint bearing seat, 7-an electromagnet, 8-a suction block, 9-a sliding rail, 10-a movable mounting plate, 11-a clamping strip, 12-a fixed mounting plate, 13-a sliding block, 14-a Mockup/jig, 15-a driving unit, 16-a hinged sheet, 17-a first supporting shaft, 18-a first sliding way, 19-a second sliding way, 20-a third sliding way, 21-a second supporting shaft, 22-a third supporting shaft and 23-a long strip hole.

Detailed Description

In order that the objects, aspects and advantages of the invention will become more apparent, the invention will be described by way of example only, and in connection with the accompanying drawings. It is to be understood that such description is merely illustrative and not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

The connection mentioned in the present invention is divided into a fixed connection and a detachable connection, the fixed connection (i.e. the non-detachable connection) includes but is not limited to a folding connection, a rivet connection, an adhesive connection, a welding connection, and other conventional fixed connection methods, the detachable connection includes but is not limited to a screw connection, a snap connection, a pin connection, a hinge connection, and other conventional detachment methods, when the specific connection method is not clearly defined, the function can be realized by always finding at least one connection method from the existing connection methods by default, and a person skilled in the art can select the connection method according to needs. For example: the fixed connection selects welding connection, and the detachable connection selects hinge connection.

The first embodiment is as follows: the present embodiment is described with reference to fig. 1 to 7, and the bending test apparatus of the present embodiment includes a base 1, a support rod 4, a movable mounting plate 10, a fixed mounting plate 12, and a driving unit 15, where the fixed mounting plate 12 is fixedly mounted on the base 1, the movable mounting plate 10 is rotatably connected with the fixed mounting plate 12, a slide rail 9 is mounted on a back surface of the movable mounting plate 10, a slide block 13 is mounted on the slide rail 9, a joint bearing seat 6 is mounted on the slide block 13, the support rod 4 is mounted in the joint bearing seat 6 through a joint bearing 5, and the driving unit 15 is mounted with the support rod 4, where a PLC control unit and a driving unit are arranged in the base 1, a Mockup 14 represents a foldable entity model, and a fixture 14 represents a test fixture for bending a. The driving unit 15 can be a servo motor, the power arm 3 is installed at the output end of the driving unit 15, the support rod 4 is fixedly installed on the power arm 3, the joint bearing seat 6 is installed on the support rod 4 through the joint bearing 5, the joint bearing seat 6 is matched with the slide rail 9 through the slide block 13, and the power arm 3 rotates to drive the support rod 4 to move, so that the movable mounting plate 10 rotates relative to the fixed mounting plate 12.

With reference to fig. 1 and 2, two oppositely arranged supporting seats 2 are mounted on a base, a power arm 3 is mounted on the inner side of each supporting seat 2 through a rotating shaft and a bearing, a supporting rod 4 is connected between the two power arms 3, a joint bearing seat 6 is mounted on the back of a movable mounting plate 10, the supporting rod 4 passes through a rolling joint bearing 10 and is mounted in the joint bearing seat 6, and the rolling joint bearing and the joint bearing seat are rotatably connected through a joint bearing, preferably, the number of the joint bearings 10 arranged on each movable mounting plate 10 is one, and the rolling joint bearing is arranged at the central position of the back of the movable mounting plate 10, so that the joint bearing seat 6 can not only slightly twist along with the supporting rod 4, but also can rotate around the supporting rod 4, and the fixed mounting plate 12 is mounted and fixed on the base 1; with the arrangement, the support rod 4 and the joint bearing seat 6 are installed in a matching manner through the joint bearing 10, and when the driving unit drives the power arm 3 to rotate, the power arm 3 drives the movable installation plate 10 to complete the rotation action.

The second embodiment is as follows: referring to fig. 1 to 7, a first embodiment of the invention is described, which is a bending test apparatus of this embodiment, two parallel elongated holes 23 are formed in the movable mounting plate 10 and the fixed mounting plate 12, the clamping strips 11 are installed in the elongated holes 23, the clamping strips 11 are installed on the movable mounting plate 10 and the fixed mounting plate 12, the elongated holes are formed in the movable mounting plate 10 and the fixed mounting plate 12, the clamping strips 11 pass through the elongated holes 23 by bolts and are installed on the movable mounting plate 10 and the fixed mounting plate 12, respectively, the fixing positions of the clamping strips 11 can be adjusted by the purpose of the elongated holes, that is, the fixing positions of the clamping strips 11 can be adjusted according to the size of the Mockup jig 14, so that the Mockup jig 14 can be stably fixed between the movable mounting plate 10 and the fixed mounting plate 12, and the Mockup jig 14 can be easily replaced, the universality of the whole equipment and the performance of the operation are improved.

Preferably, in order to prevent hard friction between the clamping strip 11 and the Mockup/jig 14, a rubber or plastic bottom lining protective layer is arranged on the clamping strip 11; preferably, to ensure stability between clamping bar 11 and Mockup/jig 14, the clamping bar end face may be ◤ or "type".

The third concrete implementation mode: referring to fig. 1 to 7, the present embodiment is described, which is a bending test apparatus of the present embodiment, the slide rail 9 is installed on the back of the movable mounting plate 10 along the moving direction of the movable mounting plate 10, after installation, the axes of the slide rail 9 and the support rod 4 are in a spatially perpendicular state, the back of each movable mounting plate 10 is installed with one slide rail 9 along the moving direction, the slide rail 9 is installed to ensure the stability of the movement between the movable mounting plate 10 and the joint bearing seat 6, the slide rail 9 is installed with a slide block 13, the slide block 13 can slide along the slide rail 9 without falling off, the joint bearing seat 6 is provided with a joint bearing 10, so that when the joint bearing seat 6 drives the movable mounting plate 10 to move, micro-torsion is allowed to be generated, the position of the movable mounting plate 10 is adjusted, and the bending process is prevented from; preferably, the sliding rail 9, the sliding block 13, the joint bearing 10 and the joint bearing seat 6 are arranged in the middle of the movable mounting plate, so that the uniform stress and the rotation flexibility can be better ensured.

The fourth concrete implementation mode: referring to fig. 1 to 7, the bending test device of the present embodiment is described, in which an electromagnet 7 is installed on a fixed installation plate 12, an absorption block 8 is installed on a movable installation plate 10, the electromagnet 7 is installed on the bottom end surface of the fixed installation plate 12, the absorption block 8 is installed on the movable installation plate 10, and the absorption block 8 and the electromagnet 7 are cooperatively absorbed; when the electromagnet 7 is electrified to work, the fixed mounting plate 12 and the movable mounting plate 10 are positioned on the same plane under the action of the magnetic force of the electromagnet 7 and are firmly attracted together, so that a tested sample piece can be conveniently mounted.

The fifth concrete implementation mode: referring to fig. 1 to 7, this embodiment, which is a bending testing apparatus of this embodiment, two sides of the fixed mounting plate 12 are respectively and fixedly mounted with a hinge piece 16, the hinge piece 16 is provided with a first support shaft 17, a first slide way 18 and a second slide way 19, and the movable mounting plate 10 is respectively provided with a third slide way 20 adapted to the first support shaft 17, a second support shaft 21 adapted to the first slide way 18, and a third support shaft 22 adapted to the second slide way 19. In order to ensure that the guide rail is designed according to the free bending curve of the flexible screen and the film material under the influence of no external stress, the motion trail is controlled by three guide rails, wherein the first motion trail is formed by a third slide way 20 matched with the first support shaft 17, the second motion trail is formed by matching and installing a second support shaft 21 matched with the first slide way 18, the third motion trail is formed by matching and installing a second slide way 19 and a third support shaft 22, the first slide way 18 and the second slide way 19 are both arc-shaped slide ways, the movable mounting plate 10 is fixedly provided with the second support shaft 21 and the third support shaft 22, the second support shaft 21 and the third support shaft 22 synchronously slide on the first slide way 18 and the second slide way 19, the sliding trail of the movable mounting plate 10 relative to the fixed mounting plate 12 under the matching of the two support shafts and the two slide ways is consistent, and the sliding is stable, so that the running trail of the test material in the bending process is completely consistent with the free bending curve, and the movement process can not generate the stress action of pulling and extruding on the test material.

Further optimized, the jig 14 controls the movement track according to the guide rail designed by the free bending curve of the test sample without the influence of external stress, so that the movement track of the test material in the bending process is completely consistent with the free bending curve, and the movement process can not generate the stress action of pulling and extruding on the test material.

The working process and the operation process are as follows:

when the bending test equipment is actually used, if a test sample is a flexible screen or a film material, the jig 14 is selected according to the bending form (U-shaped or water drop type), the bending radius (0.1-50 mm) and the material thickness (0.05-10 mm), the test sample is installed on the jig 14, and the jig 14 is installed on the movable installation plate 10 and the fixed installation plate 12 through the clamping strip 11.

When the bending test equipment is actually used, if a test sample is a rigid and foldable Mockup solid model, the Mockup 14 is installed on the movable installation plate 10 and the fixed installation plate 12 through the clamping strips 11 according to the thickness (6-20 mm) of the test sample.

Then, a power switch is turned on, testing requirements (the numerical range of the thickness h of a jig or a solid model is 1-100 mm, the initial angle is 0-180 degrees, the final angle is 0-180 degrees, the bending speed is 1-60 times/minute, and the testing times are 1-2000000 times) can be set, the test is started, a servo motor is driven, the movable mounting plate 10 is driven by the power rocker arm 3 and the support rod 4 to carry out bending tests according to the set bending angle, the bending speed, the bending radius and the bending times, the test is realized according to the design requirements of a stress-free motion curve in an ideal state, the stress influence is avoided through the connection of the joint bearing 11, a display screen displays and records the bending times, the residual bending times and the residual time required. The protective cover is used for isolating the operation test station in the test process, the bending test condition can be observed through the protective cover, the pause key pause equipment in the touch display screen can be pressed at any time, and the observation is carried out in a static state. If a fault occurs or an emergency stop switch is pressed down in the test process, the controller in the touch display screen starts an emergency stop mode and sends out an alarm signal, after the operator finishes processing and confirms reset operation on the touch display screen, the operator can operate the equipment again, and the operator can select to keep the previous operation data to continue testing or delete the historical accumulated data to retest. After the test is finished, the touch display screen can give out a prompt to inform an operator.

It should be noted that, in the above embodiments, as long as the technical solutions can be aligned and combined without contradiction, those skilled in the art can exhaust all possibilities according to the mathematical knowledge of the alignment and combination, and therefore, the present invention does not describe the technical solutions after alignment and combination one by one, but it should be understood that the technical solutions after alignment and combination have been disclosed by the present invention.

This embodiment is only illustrative of the patent and does not limit the scope of protection thereof, and those skilled in the art can make modifications to its part without departing from the spirit of the patent.

Claims

1. The utility model provides a testing arrangement buckles, includes base (1), bracing piece (4), movable mounting panel (10), fixed mounting panel (12), drive unit (15), fixed mounting panel (12) fixed mounting is on base (1), and movable mounting panel (10) rotate with fixed mounting panel (12) and are connected its characterized in that: the back of the movable mounting plate (10) is provided with a sliding rail (9), the driving unit (15) and the supporting rod (4) are installed, the supporting rod (4) is provided with a joint bearing seat (6) through a joint bearing (5), and the joint bearing seat (6) is matched with the sliding rail (9) through a sliding block (13) to realize the rotation of the movable mounting plate (10) relative to the fixed mounting plate (12).

2. A bend testing device according to claim 1, wherein: the driving unit (15) comprises a supporting seat (2) and a power arm (3), the supporting seat (2) is fixedly installed on the base (1), one end of the power arm (3) is installed in the supporting seat (2) through a bearing and a rotating shaft, and the other end of the power arm (3) is fixedly installed with the supporting rod (4).

3. A bend testing device according to claim 1, wherein: the electromagnet (7) is installed on the fixed installation plate (12), and the suction block (8) is installed on the movable installation plate (10).

4. A bend testing device according to any one of claims 1-3, characterized in that: the both sides of fixed mounting board (12) are fixed mounting respectively have articulated piece (16), are provided with first supporting shaft (17), first slide (18) and second slide (19) on articulated piece (16), be provided with respectively on movable mounting board (10) with third slide (20) of first supporting shaft (17) looks adaptation, with second back shaft (21) of first slide (18) looks adaptation, with third back shaft (22) of second slide (19) looks adaptation.

5. A bend testing device according to claim 4, wherein: the hinge piece (16) is a semicircular hinge piece, and the first supporting shaft (17) is fixed at the circle center position of the semicircular hinge piece.

6. A bend testing device according to claim 1 or 3, wherein: two strip holes (23) which are arranged in parallel are processed on the movable mounting plate (10) and the fixed mounting plate (12), and clamping strips (11) are arranged in the strip holes (23).

7. A bend testing device according to claim 1, wherein: the slide rail (9) is installed at the back of the movable mounting plate (10) along the moving direction of the movable mounting plate (10), and after the slide rail (9) is installed, the axis of the support rod (4) is in a vertical state in space.