Intelligent test piece flat supporting device and working method

Abstract

The invention relates to the technical field of packing material testing, in particular to an intelligent test piece flat-supporting device and a working method.The intelligent test piece flat-supporting device comprises a horizontal supporting plate, a lifting mechanism, a cross-shaped positioning adjusting support and a safety control system.The cross-shaped positioning adjusting support is arranged between the lifting mechanism and the horizontal supporting plate; the positioning device is used for freely adjusting and positioning the position of the horizontal supporting plate in the vertical and horizontal directions, so that the horizontal supporting plate can be more conveniently matched with material testing machines of different models; the lifting mechanism is used for driving the horizontal supporting plate to move up and down, the safety control systems are arranged on the cross-shaped positioning adjusting support, and when the cross-shaped positioning adjusting support is subjected to external force, the safety control systems are triggered to work. And when action errors occur in the lifting process, the lifting mechanism can be stopped in time, so that the material testing machine is prevented from being damaged, and the whole machine is safer and more reliable to use.

Description

Technical Field

[0001] The invention relates to the technical field of packaging material testing, and in particular to an intelligent test piece leveling device and a working method. Background Art

[0002] Peel strength refers to the average peeling force required to peel materials that are stuck together from the contact surface at a specified width. It reflects the bonding strength of the material. For packaging materials, peel strength is an important indicator reflecting its safety and reliability, especially for pharmaceutical packaging. In order to ensure its performance, it is necessary to conduct a peel strength test.

[0003] In the prior art, the peel strength test is conducted by a material testing machine. According to the requirements of the industry standard YBB00102003-2015 "Peel Strength Determination Method", the specific test process is: clamp the two ends of the peeled part of the sample in the upper and lower clamps of the test machine respectively, so that the longitudinal axis of the peeled part of the sample coincides with the center line of the upper and lower clamps, and the tightness is appropriate. During the test, the unpeeled part is T-shaped with the stretching direction. However, in the actual test, the state of the test piece is as shown in the figure of the specification. Figure 1 As shown, the two ends of the peeled portion of the test piece 2 are respectively clamped in the upper clamp 11 and the lower clamp 12 of the material testing machine 1. Under the action of gravity, the unpeeled portion 21 cannot be in a T-shape with the stretching direction, but is in a drooping or tilted state. In this case, if the tester chooses to ignore this point, the tested peeling force will be greater than the actual value.

[0004] In order to solve the above problems, in the prior art, such as patent application number CN202310497060.8, a device and working method for automatically leveling a specimen for a peel strength testing machine are disclosed. Although the device can automatically level the specimen, the overall intelligence level of the machine is low, the operation process is complicated, and it is very easy to cause damage to the material testing machine in the event of a false operation.

[0005] Based on the above situation, designing an intelligent test piece leveling device and working method that is easy to operate, highly intelligent, safe and reliable is an issue that urgently needs to be solved. Summary of the invention

[0006] The purpose of the present invention is to provide an intelligent test piece leveling device and working method to solve the problems raised in the above background technology. The device and working method reduce the labor intensity of testers, and are easy to operate, highly intelligent, safe and reliable.

[0007] The purpose of the present invention can be achieved through the following technical solutions: On the one hand, an intelligent specimen leveling device is provided, comprising: a horizontal support plate, a lifting mechanism, a cross-shaped positioning and adjusting bracket, and a safety control system. The cross-shaped positioning and adjusting bracket is placed between the lifting mechanism and the horizontal support plate, and is used to freely adjust and position the horizontal support plate in the vertical and horizontal directions, so that the horizontal support plate can be more conveniently matched with various types of material testing machines; The lifting mechanism is used to drive the horizontal support plate to move up and down. The safety control system is arranged on the cross-shaped positioning and adjusting bracket. When the cross-shaped positioning and adjusting bracket is acted upon by an external force, the safety control system is triggered to operate.

[0008] Preferably, the intelligent test piece leveling device further comprises a driving and control device and a machine base, and the driving and control device and the lifting mechanism are both installed on the machine base.

[0009] Preferably, a displacement sensor is installed at one end of the horizontal support plate, and the displacement sensor and the lifting mechanism are electrically connected to the driving and control device. The displacement sensor is used to sense the distance between the test piece and the horizontal support plate, and transmit the displacement information to the driving and control device. The driving and control device determines whether to drive the lifting mechanism according to the distance signal.

[0010] Preferably, the cross-shaped positioning and adjustment bracket includes an L-shaped vertical plate, a transverse adjustment plate and a locking screw; wherein, the horizontal part of the L-shaped vertical plate is fixedly connected to the lifting mechanism, a vertical adjustment track is provided on the vertical part of the L-shaped vertical plate, and a transverse adjustment track is provided on the transverse adjustment plate. The locking screw is arranged between the vertical adjustment track and the transverse adjustment track, and is used to adjust, fix and lock the relative position between the L-shaped vertical plate and the transverse adjustment plate.

[0011] Preferably, the safety control system includes an emergency stop limit switch, which is arranged above the horizontal support plate and is respectively arranged on the left and right sides of the locking screw with the displacement sensor. The emergency stop limit switch is used to transmit a signal to the drive and control device to stop the action of the lifting mechanism when an error occurs in the horizontal support plate during the lifting process.

[0012] Preferably, the intelligent specimen leveling device also includes a touch plate, which is arranged at the lower part of the clamping cylinder of the material testing machine. The safety control system includes a pause limit switch. A mounting slide hole is opened on the lateral adjustment plate. The pause limit switch is arranged at the mounting slide hole on the lateral adjustment plate and is located below the touch plate. In case of an action error during the lifting process, the pause limit switch contacts the touch plate above it. The pause limit switch transmits a trigger signal to the drive and control device to pause the action of the lifting mechanism.

[0013] Preferably, the emergency stop limit switch is mounted on the L-shaped vertical plate of the intelligent test piece leveling device through a movable fixing clamp, and the movable fixing clamp is used to move along the edge of the plate to a desired position and fix the emergency stop limit switch; The movable fixing clamp is provided with a card slot, a positioning screw, and a limit switch mounting hole; the card slot and the edge of the plate are used in conjunction with each other, the locking positioning screw is used to fix the movable fixing clamp, and the limit switch mounting hole is used to assist in the installation of the emergency stop limit switch.

[0014] Preferably, the displacement sensor is a diffuse reflection induction sensor, and the horizontal support plate is made of low-strength plastic material.

[0015] Preferably, an accordion dust cover is provided on the outer side of the lifting mechanism.

[0016] On the other hand, a working method of the above-mentioned intelligent test piece leveling device is also provided, comprising the following steps: S1. The two ends of the peeled part of the test piece are clamped in the upper and lower fixtures of the material testing machine respectively, and the longitudinal axis of the peeled part of the test piece is coincident with the center line of the upper and lower fixtures. The unpeeled part of the test piece is T-shaped with the tensile direction and placed on a horizontal support plate; S2. Adjust the cross-shaped positioning adjustment bracket so that the horizontal support plate is in the initial position for leveling the specimen; S3. Click the automatic tracking button, and the displacement sensor starts to sense the distance between the specimen and the horizontal support plate; S4, start the material testing machine, the test piece will rise accordingly, when the displacement sensor cannot sense the test piece, it transmits the signal that the test piece is far away to the driving and control device, and the driving and control device drives the lifting mechanism to move upward until the displacement sensor senses the test piece again and stops, and this is repeated until the lifting task is completed; S5. Click the return button, and the driving and control device drives the lifting mechanism to move downward until the horizontal support plate returns to its initial position and waits for the next lifting test; S6. After the automatic tracking function is turned on, the lifting mechanism is forced to stop if the displacement sensor cannot sense the test piece for 0.5-5s.

[0017] Beneficial effects of the present invention: 1. The intelligent specimen leveling device proposed in the present invention is equipped with a "cross-shaped" positioning and adjusting bracket, which makes the horizontal support plate positioning operation more convenient and can adapt to different models of material testing machines for leveling operations.

[0018] 2. The intelligent specimen leveling device proposed in the present invention is equipped with multiple safety control devices. When an action error occurs during the lifting process, the lifting mechanism can be stopped in time to avoid damage to the material testing machine, making the whole machine safer and more reliable to use.

[0019] 3. The working method of the intelligent test piece leveling device proposed in the present invention proposes a new control scheme, which improves the intelligence level of the whole machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative work. Figure 1 It is a structural schematic diagram of a material testing machine in the prior art; Figure 2 This is a schematic diagram of the overall structure of the automatic leveling device proposed by the present invention; Figure 3 For the present invention Figure 2 A schematic diagram of the structure of the middle cross-shaped positioning and adjusting bracket; Figure 4 The present invention Figure 2 A schematic diagram of the structure of the top view of the automatic leveling device; Figure 5 This is a schematic structural diagram of the movable fixing clamp part proposed by the present invention.

[0021] The reference numerals in the figures are as follows: 1. Material testing machine; 2. Displacement sensor; 3. Horizontal support plate; 4. Lifting mechanism; 41. Organ dust cover; 5. Cross-shaped positioning and adjustment bracket; 51. L-shaped vertical plate; 52. Vertical adjustment track; 53. Horizontal adjustment plate; 54. Horizontal adjustment track; 55. Locking screw; 56. Mounting slide hole; 6. Safety control system; 61. Emergency stop limit switch; 62. Pause limit switch; 63. Mobile fixing clamp; 631. Card slot; 632. Positioning screw; 633. Limit switch mounting hole; 7. Drive and control device; 71. Touch control panel; 72. Control button; 8. Machine base; 11. Touch panel. DETAILED DESCRIPTION

[0022] 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.

[0023] An intelligent specimen leveling device comprises: a horizontal support plate 3, a lifting mechanism 4, a cross-shaped positioning and adjusting bracket 5, and a safety control system 6. The cross-shaped positioning and adjusting bracket 5 is placed between the lifting mechanism 4 and the horizontal support plate 3, and is used to freely adjust and position the position of the horizontal support plate 3 in the vertical and horizontal directions, so that the horizontal support plate 3 can be more conveniently matched with various types of material testing machines 1.

[0024] The intelligent specimen leveling device proposed in the present application is located on one side of the material testing machine 1 in the prior art. The material testing machine 1 has two upper and lower clamps that can clamp the specimen for a peel strength test; The lifting mechanism 4 uses an electric telescopic rod, a hydraulic cylinder, a hydraulic pump or a threaded lifting structure in the prior art, and can eventually drive the cross-shaped positioning and adjusting bracket 5 connected thereto to be lifted or lowered.

[0025] The lifting mechanism 4 is used to drive the horizontal support plate 3 to move up and down. The safety control system 6 is arranged on the cross-shaped positioning and adjustment bracket 5. When the cross-shaped positioning and adjustment bracket 5 is subjected to external force, the safety control system 6 is triggered to work and transmit the signal to the driving and control device 7. The driving and control device 7 determines whether to perform a safety protection action according to the signal sent back by the safety control system 6.

[0026] The intelligent test piece leveling device further comprises a driving and control device 7 and a machine base 8 , and the driving and control device 7 and the lifting mechanism 4 are both installed on the machine base 8 .

[0027] The driving and control device 7 is a driving controller, which is provided with a touch control panel 71 and control buttons 72. The touch control panel 71 and control buttons 72 can be used to control the rising, falling, returning to the original position, automatic tracking and other actions of the intelligent specimen leveling device.

[0028] A displacement sensor 2 is installed at one end of the horizontal support plate 3. The displacement sensor 2 and the lifting mechanism 4 are electrically connected to the driving and control device 7. The displacement sensor 2 is used to sense the distance between the test piece and the horizontal support plate 3, and transmit the displacement information to the driving and control device 7. The driving and control device 7 determines whether to drive the lifting mechanism 4 to operate according to the distance signal.

[0029] The cross-shaped positioning and adjusting bracket 5 comprises an L-shaped vertical plate 51, a horizontal adjustment plate 53 and a locking screw 55; Among them, the horizontal part of the L-shaped vertical plate 51 is fixedly connected to the lifting mechanism 4, so that the lifting mechanism 4 can drive the L-shaped vertical plate 51 to rise and fall, and a vertical adjustment track 52 is provided on the vertical part of the L-shaped vertical plate 51, and a horizontal adjustment track 54 is provided on the horizontal adjustment plate 53. The locking screw 55 is arranged between the vertical adjustment track 52 and the horizontal adjustment track 54, and is used to adjust, fix and lock the relative position between the L-shaped vertical plate 51 and the horizontal adjustment plate 53. The horizontal support plate 3 is installed on the horizontal adjustment plate 53.

[0030] The safety control system 6 includes an emergency stop limit switch 61, which is arranged above the horizontal support plate 3 and is respectively arranged on the left and right sides of the locking screw 55 with the displacement sensor 2. When an action error occurs during the lifting process, the horizontal support plate 3 rotates around the locking screw 55 due to the external force, and the horizontal support plate 3 will trigger the emergency stop limit switch 61. The emergency stop limit switch 61 transmits a signal to the drive and control device 7 to stop the action of the lifting mechanism 4, thereby preventing the horizontal support plate 3 from continuing to move upward and causing damage to the material testing machine 1.

[0031] The intelligent specimen leveling device also includes a touch plate 11, which is arranged at the lower part of the clamping cylinder of the material testing machine 1. The safety control system 6 includes a pause limit switch 62. A mounting slide hole 56 is opened on the lateral adjustment plate 53. The pause limit switch 62 is arranged at the mounting slide hole 56 on the lateral adjustment plate 53. The pause limit switch 62 can be installed at the mounting slide hole 56 through a bolt structure and is located below the touch plate 11. When an action error occurs during the lifting process, the pause limit switch 62 contacts the touch plate 11 above it. The pause limit switch 62 transmits a trigger signal to the drive and control device 7 to pause the action of the lifting mechanism 4 to prevent the horizontal support plate 3 from continuing to move upward and causing damage to the material testing machine 1. At the same time, when the material testing machine 1 continues to move, after the trigger signal of the pause limit switch 62 is released, the drive and control device 7 drives the lifting mechanism 4 to continue to move, which adds a safety protection to the intelligent specimen leveling device and does not terminate the leveling test.

[0032] The touch panel 11 and the pause limit switch 62 are both arranged on the side away from the operator's operation, which can effectively prevent the pause limit switch 62 from hindering the installation when the operator installs the test piece.

[0033] The emergency stop limit switch 61 is installed on the L-shaped vertical plate 51 of the intelligent test piece leveling device through a movable fixing clamp 63. The movable fixing clamp 63 is used to move along the plate edge to a desired position and fix the emergency stop limit switch 61. The movable fixing clamp 63 is provided with a slot 631, a positioning screw 632, and a limit switch mounting hole 633; ​​the slot 631 and the edge of the plate are used in conjunction with each other so that the movable fixing clamp 63 can move along the edge of the plate to a desired position, the locking positioning screw 632 is used to fix the movable fixing clamp 63, and the limit switch mounting hole 633 is used to assist in the installation of the emergency stop limit switch 61; That is, when installing the emergency stop limit switch 61, the edge of the plate (the side plate edge of the L-shaped vertical plate 51 in the vertical direction and the side plate edge of the horizontal support plate 3 in the horizontal direction) is inserted into the slot 631, the positioning screw 632 is locked, the movable fixing clamp 63 is fixed, and the limit switch is fixed to the movable fixing clamp 63 through the limit switch mounting hole 633.

[0034] On the other hand, it is also possible to not open the installation slide hole 56 on the lateral adjustment plate 53, and install the pause limit switch 62 on the lateral adjustment plate 53 by moving the fixing clamp 63. The installation method of the fixing clamp 63 for the pause limit switch 62 is the same as the installation method of the fixing clamp 63 for the emergency stop limit switch 61.

[0035] The displacement sensor 2 is a diffuse reflection induction sensor, which has the advantages of low cost and fast response speed. The horizontal support plate 3 is made of low-strength plastic material. When the program of the intelligent specimen leveling device is disordered, even if the horizontal support plate 3 moves randomly and hits the material testing machine 1, the horizontal support plate 3 is made of a plastic material with lower strength and will be easily broken, thereby avoiding damage to the material testing machine 1.

[0036] An accordion dust cover 41 is arranged outside the lifting mechanism 4 to provide dust protection for the lifting mechanism 4 .

[0037] Before use, place the intelligent specimen leveling device on the side of the material testing machine 1. The driving and control device 7 has an automatic tracking button and a return button, which can control the displacement sensor 2 and the lifting mechanism 4. In addition, the driving and control device 7 itself also has an internal program that can realize the control of the displacement sensor 2 and the lifting mechanism 4.

[0038] A working method of an intelligent test piece leveling device comprises the following steps: S1, the two ends of the peeled part of the test piece are clamped in the upper clamp and the lower clamp of the material testing machine 1 respectively, and the longitudinal axis of the peeled part of the test piece is coincident with the center line of the upper clamp and the lower clamp, and the unpeeled part of the test piece is T-shaped with the tensile direction and placed on the horizontal support plate 3; S2, adjusting the cross-shaped positioning and adjusting bracket 5 so that the horizontal support plate 3 is in the initial position for leveling the specimen; S3, click the automatic tracking button, and the displacement sensor 2 starts to sense the distance between the test piece and the horizontal support plate 3; S4, start the material testing machine 1, the test piece will rise accordingly, and when the displacement sensor 2 cannot sense the test piece, it transmits a signal that the test piece is far away to the driving and control device 7, and the driving and control device 7 drives the lifting mechanism 4 to move upward until the displacement sensor 2 senses that the test piece stops again, and this is repeated until the lifting task is completed; S5. Click the return button, and the driving and control device 7 drives the lifting mechanism 4 to move downward until the horizontal support plate 3 returns to the initial position to wait for the next lifting test; S6. After the automatic tracking function is turned on, the displacement sensor 2 forces the lifting mechanism 4 to stop if it cannot sense the specimen for 0.5-5s. This arrangement can not only realize that after completing a lifting task, the lifting mechanism 4 automatically stops after moving for 0.5-5s to avoid unlimited lifting of the lifting mechanism 4, but also can realize that when the intelligent specimen leveling device fails, the lifting mechanism 4 automatically stops after moving for 0.5-5s to avoid damage to the material testing machine 1 by the intelligent specimen leveling device, thereby improving the intelligence level of the intelligent specimen leveling device while increasing safety.

[0039] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. An intelligent test piece leveling device, characterized in that: include: A horizontal support plate (3), a lifting mechanism (4), a cross-shaped positioning and adjusting bracket (5), and a safety control system (6), wherein the cross-shaped positioning and adjusting bracket (5) is disposed between the lifting mechanism (4) and the horizontal support plate (3) and is used to freely adjust and position the horizontal support plate (3) in the vertical and horizontal directions, so that the horizontal support plate (3) can be more conveniently matched with various types of material testing machines (1); The lifting mechanism (4) is used to drive the horizontal support plate (3) to move up and down. The safety control system (6) is arranged on the cross-shaped positioning and adjustment bracket (5). When the cross-shaped positioning and adjustment bracket (5) is subjected to an external force, the safety control system (6) is triggered to operate.

2. The intelligent test piece leveling device according to claim 1, characterized in that: The intelligent test piece leveling device further comprises a driving and control device (7) and a machine base (8), and the driving and control device (7) and the lifting mechanism (4) are both mounted on the machine base (8).

3. The intelligent test piece leveling device according to claim 2, characterized in that: A displacement sensor (2) is installed at one end of the horizontal support plate (3). The displacement sensor (2) and the lifting mechanism (4) are electrically connected to the driving and control device (7). The displacement sensor (2) is used to sense the distance between the test piece and the horizontal support plate (3) and transmit the displacement information to the driving and control device (7). The driving and control device (7) determines whether to drive the lifting mechanism (4) to operate according to the distance signal.

4. The intelligent test piece leveling device according to claim 1, characterized in that: The cross-shaped positioning and adjusting bracket (5) comprises an L-shaped vertical plate (51), a horizontal adjustment plate (53) and a locking screw (55); The horizontal portion of the L-shaped vertical plate (51) is fixedly connected to the lifting mechanism (4), a vertical adjustment track (52) is provided on the vertical portion of the L-shaped vertical plate (51), a horizontal adjustment track (54) is provided on the horizontal adjustment plate (53), and a locking screw (55) is arranged between the vertical adjustment track (52) and the horizontal adjustment track (54) for adjusting, fixing and locking the relative position between the L-shaped vertical plate (51) and the horizontal adjustment plate (53).

5. The intelligent test piece leveling device according to claim 4, characterized in that: The safety control system (6) comprises an emergency stop limit switch (61), which is arranged above the horizontal support plate (3) and is arranged on the left and right sides of the locking screw (55) together with the displacement sensor (2). The emergency stop limit switch (61) is used to transmit a signal to the driving and control device (7) to stop the action of the lifting mechanism (4) when an action error occurs in the lifting process of the horizontal support plate (3).

6. The intelligent test piece leveling device according to claim 5, characterized in that: The intelligent specimen leveling device further comprises a touch plate (11), the touch plate (11) being arranged at the lower part of the clamping cylinder of the material testing machine (1), the safety control system (6) comprising a pause limit switch (62), a mounting slide hole (56) being provided on the lateral adjustment plate (53), the pause limit switch (62) being arranged at the mounting slide hole (56) on the lateral adjustment plate (53) and being located below the touch plate (11), and being used for suspending the action of the lifting mechanism (4) when an action error occurs during the lifting process and the pause limit switch (62) contacts the touch plate (11) above it, and transmitting a trigger signal to the driving and control device (7) to suspend the action of the lifting mechanism (4).

7. The intelligent test piece leveling device according to claim 6, characterized in that: The emergency stop limit switch (61) is mounted on the L-shaped vertical plate (51) of the intelligent test piece leveling device via a movable fixing clamp (63), and the movable fixing clamp (63) is used to move along the edge of the plate to a desired position and fix the emergency stop limit switch (61); The movable fixing clamp (63) is provided with a slot (631), a positioning screw (632), and a limit switch mounting hole (633); the slot (631) and the edge of the plate are used in conjunction with each other, the locking positioning screw (632) is used to fix the movable fixing clamp (63), and the limit switch mounting hole (633) is used to assist in the installation of the emergency stop limit switch (61).

8. The intelligent test piece leveling device according to claim 1, characterized in that: The displacement sensor (2) is a diffuse reflection induction sensor, and the horizontal support plate (3) is made of low-strength plastic material.

9. The intelligent test piece leveling device and working method according to claim 1, characterized in that: An accordion dust cover (41) is arranged outside the lifting mechanism (4).

10. A working method of the intelligent test piece leveling device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. The two ends of the peeled portion of the test piece are respectively clamped in the upper clamp and the lower clamp of the material testing machine (1), and the longitudinal axis of the peeled portion of the test piece is aligned with the center line of the upper clamp and the lower clamp. The unpeeled portion of the test piece is placed in a T-shape with the tensile direction and on a horizontal support plate (3); S2, adjusting the cross-shaped positioning adjustment bracket (5) so that the horizontal support plate (3) is in the initial position for leveling the specimen; S3. Click the automatic tracking button, and the displacement sensor (2) starts to sense the distance between the test piece and the horizontal support plate (3); S4, starting the material testing machine (1), the test piece will rise accordingly, and when the displacement sensor (2) cannot sense the test piece, a signal indicating that the test piece is moving away is transmitted to the driving and control device (7), and the driving and control device (7) drives the lifting mechanism (4) to move upward until the displacement sensor (2) senses that the test piece has stopped again, and this process is repeated until the lifting task is completed; S5. Click the return button, and the driving and control device (7) drives the lifting mechanism (4) to move downward until the horizontal support plate (3) returns to the initial position to wait for the next lifting test; S6. After the automatic tracking function is turned on, the displacement sensor (2) is unable to sense the test piece for 0.5-5s, and the lifting mechanism (4) is forced to stop.

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