Hardness testing device for glass cover plate

Abstract

The utility model relates to the technical field of hardness testing, in particular to a hardness testing device for a glass cover plate. According to the technical scheme, the Knoop pressing device comprises a workbench, a main body and a Knoop pressing head, a back plate is arranged on the upper surface of the workbench, a limiting frame is arranged on the back plate through a lead screw assembly, the Knoop pressing head is arranged on the back plate in a lifting mode through a power assembly, and an oil chamber is arranged on the lower surface of the main body; and plug rods are arranged on the main body in an equidistant lifting mode through a driving assembly, a lower pressure sensor is arranged at the top end of each plug rod, and a contact block is installed at the working end of each lower pressure sensor. According to the utility model, stable, balanced and comprehensive supporting force can be provided for the glass cover plate through an irregular applicability adjusting mode of the supporting contact block, so that the phenomenon that the glass is broken due to a gap between the glass and the detection table top when the glass is pressed can be avoided, and the hardness of the glass can be clearly detected.

Description

Technical Field

[0001] The utility model relates to the technical field of hardness testing, in particular to a hardness testing device for a glass cover plate. Background Technique

[0002] In the existing glass processing and manufacturing process, it is necessary to conduct sampling hardness testing on the glass. Generally, the Vickers hardness testing method is used to place the glass plate to be tested on the testing tabletop.

[0003] During the testing process, there may be flatness problems with the glass plate itself, which may lead to gaps between the glass and the testing tabletop. The supporting force received by the glass plate itself is uneven, which may cause the glass to crack directly under the extrusion of the Knoop indenter during the testing process, resulting in the inability to clearly detect the hardness of the glass itself.

[0004] Therefore, we propose a hardness testing device for a glass cover plate to solve the existing problems. Content of the Utility Model

[0005] The purpose of the utility model is to propose a hardness testing device for a glass cover plate aiming at the problems existing in the background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A hardness testing device for a glass cover plate, including a workbench, a main body, and a Knoop indenter. A backboard is provided on the upper surface of the workbench. A limiting frame is provided on the backboard through a lead screw assembly. The Knoop indenter is lifted and lowered on the backboard through a power assembly. An oil chamber is provided on the lower surface of the main body. Each plunger rod is lifted and lowered equidistantly on the main body through a driving assembly. A lower pressure sensor is provided at the top of each plunger rod, and a touch block is installed at the working end of the lower pressure sensor.

[0007] Preferably, the lead screw assembly is composed of a machine box, a lead screw, and a slider. One end of the slider is fixed on the outer wall of the limiting frame. The slider is slidably installed on the backboard. The lead screw is threadedly installed on the slider, and both ends of the lead screw are rotatably installed on the backboard.

[0008] Preferably, the machine box is fixed on the upper surface of the backboard through bolts. The output end of the motor installed in the machine box is connected to the top of the lead screw.

[0009] Preferably, the power assembly is composed of a hydraulic cylinder and an upper pressure sensor. The hydraulic cylinder is provided on the backboard. The upper pressure sensor is provided on the output end of the hydraulic cylinder. The Knoop indenter is installed on the working end of the upper pressure sensor.

[0010] Preferably, the driving assembly is composed of an oil chamber, an oil inlet pipe, a chute, and a solenoid valve. Each of the chutes is opened in the main body, and the plug rod is slidably inserted into the chute.

[0011] Preferably, the chute is interconnected with the interior of the oil chamber through a communication hole, and the solenoid valve is arranged in the communication hole.

[0012] Preferably, the oil inlet pipe is arranged on the side of the oil chamber, and the two oil inlet pipes are interconnected with the interior of the oil chamber.

[0013] Preferably, the lower surface of the workbench is provided with support seats. There are four support seats in total, and the positions of the four support seats are distributed in a rectangular array on the lower surface of the workbench.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] During the use of the hardness testing device for glass covers of the present utility model, the glass cover to be detected can be placed on each touch block of the main body, and then the limiting frame is controlled to descend through the lead screw assembly. The glass cover enters the limiting frame for position limitation to prevent the glass cover from shifting.

[0016] When the touch block contacts the glass cover, the glass cover presses the touch block, so that the lower pressure sensor transmits a pressure signal. Through the oil inlet pipe connected to the external hydraulic pump structure, the oil enters the oil chamber. When the glass cover is uneven, at this time, some touch blocks cannot contact the glass cover, and the corresponding pressure signal is none. Then, the corresponding solenoid valve is controlled to open, and the oil enters the chute and pushes the corresponding plug rod upward, so that this touch block contacts the surface of the glass cover. Under the same principle, under the control of the main machine, the pressure signals corresponding to each touch block are adjusted to be the same. At this time, each touch block provides a stable and comprehensive supporting force for the glass cover.

[0017] After the positioning of the glass cover is completed, the Knoop indenter is driven to descend through the power assembly, and a specified pressure is output to the glass cover under the control of the upper pressure sensor. Then, the hardness of the glass cover is detected through the Vickers hardness detection principle.

[0018] In the present utility model, through the irregular applicability adjustment method of the supporting touch blocks, a stable, balanced and comprehensive supporting force can be provided for the glass cover, the phenomenon that the glass is damaged due to the gap between the glass and the detection table surface when the glass is pressed can be avoided, and the hardness of the glass itself can be clearly detected. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0020] Figure 2 is a schematic diagram of the back plate structure of the present utility model;

[0021] Figure 3 This is a schematic diagram of the main structure of the present utility model;

[0022] Figure 4 This is a schematic diagram of the installation structure of a single contact block of the present utility model;

[0023] Figure 5 This is a three-dimensional structure schematic diagram of the present utility model.

[0024] Reference numerals:

[0025] 1, support base; 2, workbench; 3, oil chamber; 4, oil inlet pipe; 5, main body; 6, limit frame; 7, hydraulic cylinder; 8, back plate; 9, chassis; 10, screw rod; 11, slider; 12, contact block; 13, lower pressure sensor; 14, plug rod; 15, chute; 16, solenoid valve; 17, Knoop indenter; 18, upper pressure sensor. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0027] Embodiment 1

[0028] As Figures 1 - 5 shown, a hardness testing device for glass covers proposed by the present utility model includes a workbench 2, a main body 5 and a Knoop indenter 17. A back plate 8 is provided on the upper surface of the workbench 2. A limit frame 6 is provided on the back plate 8 through a lead screw assembly. The Knoop indenter 17 is lifted and lowered on the back plate 8 through a power assembly. An oil chamber 3 is provided on the lower surface of the main body 5. Each plug rod 14 is lifted and lowered equidistantly on the main body 5 through a driving assembly. A lower pressure sensor 13 is provided at the top of each plug rod 14. A contact block 12 is installed at the working end of the lower pressure sensor 13.

[0029] Based on Embodiment 1:

[0030] During the use of the hardness testing device for glass covers of the present utility model, the glass cover to be detected can be placed on each contact block 12 of the main body 5, and then the limit frame 6 is controlled to move downward through the lead screw assembly, and the glass cover enters the limit frame 6 for position limitation to prevent the glass cover from shifting;

[0031] When the contact block 12 touches the glass cover plate, the glass cover plate presses the contact block 12, causing the lower pressure sensor 13 to transmit a pressure signal. Through the oil inlet pipe 4, it is connected to an external hydraulic pump structure, and the oil enters the oil chamber 3. When the glass cover plate is uneven, some of the contact blocks 12 cannot touch the glass cover plate at this time, and the corresponding pressure signal is none. Thus, the corresponding solenoid valve 16 is controlled to open, and the oil enters the chute 15 and pushes the corresponding plug rod 14 upward, so that this contact block 12 touches the surface of the glass cover plate. Under the same principle, under the control of the host, the pressure signals corresponding to each contact block 12 are adjusted to be the same. At this time, each contact block 12 provides a stable and comprehensive supporting force for the glass cover plate;

[0032] After the positioning of the glass cover plate is completed, the Vickers indenter 17 is driven by the power component to move downward, and a specified pressure is output to the glass cover plate under the control of the upper pressure sensor 18, and then the hardness of the glass cover plate is detected by the Vickers hardness detection principle.

[0033] Embodiment 2

[0034] As Figures 1 - 5 shown, a hardness testing device for a glass cover plate proposed by the present utility model, compared with Embodiment 1, this embodiment further includes: The lead screw assembly is composed of a chassis 9, a lead screw 10 and a slider 11. One end of the slider 11 is fixed on the outer wall of the limit frame 6. The slider 11 is slidably installed on the back plate 8. The lead screw 10 is threadedly installed on the slider 11, and both ends of the lead screw 10 are rotatably installed on the back plate 8. The chassis 9 is fixed on the upper surface of the back plate 8 by bolts. The output end of the motor installed in the chassis 9 is connected to the top end of the lead screw 10. When the motor works, it drives the lead screw 10 to rotate. Under the principle of the lead screw, the rotational movement of the lead screw 10 can be converted into the lifting movement of the limit frame 6.

[0035] The power component is composed of a hydraulic cylinder 7 and an upper pressure sensor 18. The hydraulic cylinder 7 is arranged on the back plate 8, and the upper pressure sensor 18 is arranged on the output end of the hydraulic cylinder 7. The Vickers indenter 17 is installed on the working end of the upper pressure sensor 18. When the hydraulic cylinder 7 works, it drives the Vickers indenter 17 to move downward to press the glass cover plate. During the pressing process, the upper pressure sensor 18 detects the pressure signal. When it reaches the specified pressure, the hydraulic cylinder 7 is controlled to stop working.

[0036] The oil inlet pipe 4 is arranged on the side of the oil chamber 3. The two oil inlet pipes 4 are communicated with the inside of the oil chamber 3. Through the oil inlet pipe 4, it is connected to an external hydraulic pump structure, and the oil enters the oil chamber 3.

[0037] The driving component is composed of an oil chamber 3, an oil inlet pipe 4, a sliding groove 15 and a solenoid valve 16. Each sliding groove 15 is opened in the main body 5. The plug rod 14 is slidably inserted into the sliding groove 15. The sliding groove 15 is interconnected with the interior of the oil chamber 3 through a communication hole. The solenoid valve 16 is arranged in the communication hole. When the corresponding touch block 12 cannot contact the glass cover plate, the pressure signal of the corresponding lower pressure sensor 13 is none, so as to control the corresponding solenoid valve 16 to open, and the oil enters the sliding groove 15.

[0038] The lower surface of the workbench 2 is provided with support seats 1. There are four support seats 1 in total, and the positions of the four support seats 1 are distributed in a rectangular array on the lower surface of the workbench 2.

[0039] It should be noted that the structures of the motor, the hydraulic cylinder 7, the solenoid valve 16, the lower pressure sensor 13, and the upper pressure sensor 18 are existing mature technologies. Their working principles and internal structures are known to those skilled in the art. The present utility model only utilizes their functions and does not improve their internal structures. Therefore, no detailed description will be given here. Those skilled in the art can make any optional selection according to their needs or convenience.

[0040] The above specific embodiments are only several preferred embodiments of the present utility model. Based on the technical solution of the present utility model and the relevant revelations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

[0041] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A hardness testing device for a glass cover plate, comprising a workbench (2), a main body (5) and a Knoop indenter (17), characterized in that: The upper surface of the workbench (2) is provided with a back plate (8), a limit frame (6) is provided on the back plate (8) through a screw assembly, the Knoop pressure head (17) is lifted and lowered on the back plate (8) through a power assembly, an oil chamber (3) is provided on the lower surface of the main body (5), and various plug rods (14) are equidistantly lifted and lowered on the main body (5) through a drive assembly, a downward pressure sensor (13) is provided at the top end of each plug rod (14), and a contact block (12) is installed at the working end of the downward pressure sensor (13).

2. A hardness testing device for a glass cover according to claim 1, characterized in that: The screw assembly is composed of a chassis (9), a screw rod (10) and a slider (11); one end of the slider (11) is fixed to the outer wall of the limit frame (6); the slider (11) is slidably mounted on the back plate (8); the screw rod (10) is threadedly mounted on the slider (11); and both ends of the screw rod (10) are rotatably mounted on the back plate (8).

3. A hardness testing device for a glass cover according to claim 2, characterized in that: The chassis (9) is fixed to the upper surface of the back plate (8) by means of bolts, and the output end of the motor arranged in the chassis (9) is connected to the top end of the screw rod (10).

4. The hardness testing device for a glass cover according to claim 1, characterized in that: The power assembly is composed of a hydraulic cylinder (7) and an upper pressure sensor (18); the hydraulic cylinder (7) is arranged on the back plate (8); the upper pressure sensor (18) is arranged on the output end of the hydraulic cylinder (7); and the Knoop pressure head (17) is installed on the working end of the upper pressure sensor (18).

5. The hardness testing device for a glass cover according to claim 1, characterized in that: The driving assembly is composed of an oil chamber (3), an oil inlet pipe (4), a slide groove (15) and a solenoid valve (16); each of the slide grooves (15) is arranged in the main body (5), and the plug rod (14) is slidably inserted in the slide groove (15).

6. The hardness testing device for a glass cover according to claim 5, characterized in that: The slide groove (15) is connected to the interior of the oil chamber (3) through a connecting hole, and the solenoid valve (16) is arranged in the connecting hole.

7. The hardness testing device for a glass cover according to claim 5, characterized in that: The oil inlet pipe (4) is arranged on the side of the oil chamber (3), and the two oil inlet pipes (4) are interconnected with the interior of the oil chamber (3).

8. The hardness testing device for a glass cover according to claim 1, characterized in that: A support seat (1) is provided on the lower surface of the workbench (2), and there are four support seats (1) in total, and the positions of the four support seats (1) are distributed in a rectangular array on the lower surface of the workbench (2).

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