A compression ratio detection device

Abstract

This invention provides a compressibility testing device, which includes a test platform and a support. A pressure plate unit is mounted on the support and located above the test platform. The pressure plate unit includes a stress detection component. This compressibility testing device can improve testing accuracy, simplify the testing process, and increase testing efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of detection technology and relates to a compression ratio detection device. Background Technology

[0002] Product thickness testing: Place the product on marble and measure five points with a thickness gauge, taking the average value (using a U-shaped pressure block to ensure product flatness). Compression ratio testing: Lift the probe, slide the product under the probe, read the data, and then place weights on the thickness gauge. Read the data again, calculate the average value using the formula (measurements at three different points within 25mm of the center point). Traditional testing methods, due to the manual placement of weights, are prone to introducing external errors, leading to unstable compression ratio test results and low accuracy.

[0003] CN111157351A discloses a testing device and method for detecting the compression rate and rebound rate of expanded polytetrafluoroethylene (ePTFE) facial implants. The testing device includes a base, a fixed bracket, and an instrument panel. Two sliders are mounted on the base, with a support block between them. A sample block of the product to be tested can be placed on the support block. An insertion hole is located at the rear of the instrument panel, through which a support rod is vertically inserted, with its lower part protruding from the bottom of the instrument panel. A weight pan and weights can be placed at the top of the support rod. The lower end of the support rod is connected to a test rod, and the instrument's test pressure head at the lower end of the test rod lightly presses against the sample block. A position sensor is installed inside the instrument panel to detect the distance the support rod moves and indicate it on the instrument panel surface. The testing method includes testing and calculation. This device can be used to detect the compression rate of ePTFE. However, due to the low rigidity of ePTFE, this device cannot be directly used for testing rigid samples.

[0004] CN114839051A discloses a device and method for detecting the compressibility of flexible graphite plates. The device includes a linear bearing fixedly connected to a pressure block via a bearing seat. The linear bearing is sleeved on a guide shaft, the top of which is connected to a base plate. The pressure block has a slotted locking structure, and a dial indicator is mounted on this structure, with the dial indicator's probe axis perpendicular to the top surface of the base plate. The device synchronously drives the pressure block and the dial indicator up and down via the linear bearing to collect localized compressibility data of the flexible graphite plate. This device, being designed for flexible materials, cannot be directly used for testing rigid samples. Utility Model Content

[0005] To address the technical problems existing in the prior art, this utility model provides a compression ratio detection device, which can improve testing accuracy, simplify the testing process, and increase testing efficiency.

[0006] To achieve the above-mentioned technical effects, the present invention adopts the following technical solution:

[0007] This utility model provides a compression ratio testing device, which includes a test platform and a support. A pressure plate unit is arranged on the support and is located above the test platform. The pressure plate unit includes a stress detection component.

[0008] In this invention, the use of a pressure plate unit avoids the human error introduced by manually placing counterweights in traditional compression ratio testing. Furthermore, the pressure applied by the pressure plate can be adjusted according to different testing components, and the reaction force on the pressure plate is measured using a stress detection component. This stress detection component can be connected to a computer system, feeding back the test values. The computer system then automatically calculates and directly reads the measured compression ratio value.

[0009] In this invention, the stress detection component can be a stress sensor.

[0010] As a preferred embodiment of this invention, the pressure plate unit further includes a pressure plate and a transmission component connected to the pressure plate.

[0011] In this invention, the pressure plate is circular in shape, but not limited to a circle. It can also be a regular polygon such as an equilateral triangle, square, regular pentagon or regular hexagon, or an irregular polygon, or an ellipse, or a combination of the above.

[0012] As a preferred technical solution of this utility model, the transmission assembly includes a connecting rod and a transmission part, wherein the transmission part causes the connecting rod to move in a direction perpendicular to the test platform.

[0013] In this invention, the pressure plate can be raised or lowered by driving the connecting rod to move through the transmission part, in which case the connecting rod is a rigid rod; alternatively, a transmission component can be set inside the connecting rod, and since the connecting rod is a telescopic rod, the transmission component drives the telescopic rod to extend or retract.

[0014] As a preferred embodiment of this invention, the transmission unit is connected to the automatic control component.

[0015] In this invention, the transmission unit can be connected to the automatic control component, which can then be used to start and stop the transmission unit, and simultaneously control the pressure applied by the pressure plate.

[0016] As a preferred technical solution of this utility model, the testing platform is provided with a suction component, which is used to fix the sample.

[0017] In this invention, the suction component can be a magnetic component, which fixes the sample using magnetic force. Alternatively, the suction component can be a negative pressure generating device, which fixes the sample by creating a pressure difference between the pressure at the bottom of the sample and the ambient pressure.

[0018] As a preferred technical solution of this utility model, the bracket includes a support rod and a crossbeam.

[0019] In this invention, the support rod and the crossbeam can be fixedly connected, i.e., connected by welding or bonding. Alternatively, they can be movable, i.e. connected by tenon joints or riveting.

[0020] As a preferred embodiment of this invention, the support rods are distributed along the edge of the test platform, and the crossbeam is located above the test platform.

[0021] In this invention, the support rods can be distributed at equal intervals along the edge of the test platform or they can be distributed irregularly, but ultimately the balance of the support must be maintained to avoid uneven pressure applied by the pressure plate due to the shift of the center of gravity of the support.

[0022] As a preferred technical solution of this utility model, the pressure plate unit is fixedly connected to the crossbeam.

[0023] In this invention, the pressure plate unit is preferably fixedly connected to the crossbeam, but a movable connection can also be chosen. That is, the position of the pressure plate unit can be moved to meet the testing requirements of samples of different shapes, so that the pressure applied by the disc is evenly distributed on the sample surface.

[0024] As a preferred technical solution of this utility model, the support rod is fixedly connected to the test platform.

[0025] In this invention, the support rod and the test platform are preferably fixedly connected, but a detachable connection can also be selected, making the compression ratio detection device easy to move and assemble.

[0026] In this invention, the method for detecting compression ratio using a compression ratio detection device includes:

[0027] The sample is placed on the test platform and fixed by the suction component of the test platform. The pressure value provided by the preset pressure plate is set, and the transmission part of the pressure plate unit is started by the automatic control component. The transmission part drives the connecting rod to move downward. When the preset pressure value is reached, the movement stops. After the system stabilizes, the stress value of the pressure plate is detected by the stress detection component, and the compression ratio of the sample is calculated.

[0028] The compression ratio is calculated as follows: After applying several stresses to the same product, test the product thickness and the reaction force on the pressure plate under different applied stresses. Calculate the compression ratio based on the product thickness under applied stress, and perform regression analysis to obtain the corresponding equation between the compression ratio and the reaction force on the pressure plate. Then, substitute the readings of the stress detection component into this equation to calculate the corresponding compression ratio.

[0029] Compared with the prior art, the present invention has at least the following beneficial effects:

[0030] This invention provides a compression ratio detection device, which can improve testing accuracy, simplify the testing process, and increase testing efficiency. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the compression ratio detection device provided in Embodiment 2 of this utility model;

[0032] Figure 2 This is a schematic diagram of the compression ratio detection device provided in Embodiment 3 of this utility model;

[0033] In the diagram: 1-Test platform, 2-Bracket, 3-Pressure plate assembly, 31-Pressure plate.

[0034] The present invention will now be described in further detail. However, the examples described below are merely simplified examples of the present invention and do not represent or limit the scope of protection of the present invention. The scope of protection of the present invention shall be determined by the claims. Detailed Implementation

[0035] To better illustrate this utility model and facilitate understanding of its technical solution, typical but non-limiting embodiments of this utility model are as follows:

[0036] Example 1

[0037] This utility model provides a compression ratio detection device, which includes a test platform 1 and a support 2. A pressure plate unit 3 is provided on the support and is located above the test platform 1. The pressure plate unit 3 includes a stress detection component.

[0038] Example 2

[0039] This utility model provides a compressibility testing device, which includes a test platform 1 and a support 2. A pressure plate unit 3 is provided on the support and is located above the test platform 1. The pressure plate unit 3 includes a stress detection component.

[0040] The pressure plate unit 3 also includes a pressure plate 31 and a transmission assembly connected to the pressure plate;

[0041] The transmission assembly includes a connecting rod and a transmission part. The transmission part causes the connecting rod to move in a direction perpendicular to the test platform. The connecting rod is an aluminum alloy rigid tube.

[0042] The pressure plate 31 is detachably connected to the connecting rod, and the pressure plate 31 is circular.

[0043] The transmission unit is connected to the automatic control assembly;

[0044] The test platform 1 is equipped with a suction component, which is used to fix the sample.

[0045] The support 2 includes two support rods and a crossbeam. The support rods are evenly distributed along the edge of the test platform. The crossbeam is located above the test platform 1. The pressure plate unit 3 is fixedly welded to the crossbeam, and the support rods are welded to the test platform 1.

[0046] Example 3

[0047] This utility model provides a compressibility testing device, which includes a test platform 1 and a support 2. A pressure plate unit 3 is provided on the support and is located above the test platform 1. The pressure plate unit 3 includes a stress detection component.

[0048] The pressure plate unit 3 also includes a pressure plate 31 and a transmission assembly connected to the pressure plate;

[0049] The transmission assembly includes a connecting rod and a transmission part. The connecting rod is an aluminum alloy telescopic rod, and the transmission part is disposed inside the connecting rod. The transmission part causes the connecting rod to extend and retract in a direction perpendicular to the test platform.

[0050] The pressure plate 31 is detachably connected to the connecting rod, and the pressure plate 31 is rectangular.

[0051] The transmission unit is connected to the automatic control assembly;

[0052] The test platform 1 is equipped with a suction component, which is used to fix the sample.

[0053] The support 2 includes two support rods and a crossbeam. The support rods are evenly distributed along the edge of the test platform. The crossbeam is located above the test platform 1. The pressure plate unit 3 is fixedly welded to the crossbeam, and the support rods are welded to the test platform 1.

[0054] Application Example 1

[0055] The compressibility testing device provided in Example 2 was used to test samples 1-5. The testing method included:

[0056] The sample is placed on the test platform and fixed by the suction component of the test platform. The pressure value provided by the preset pressure plate is set, and the transmission part of the pressure plate unit is started by the automatic control component. The transmission part drives the connecting rod to move downward. When the preset pressure value is reached, the movement stops. After the system stabilizes, the stress value of the pressure plate is detected by the stress detection component, and the compression ratio of the sample is calculated. The results are shown in Table 1.

[0057] Samples 1-3 are finished grinding pads, and samples 4-5 are the raw materials for the finished grinding pads.

[0058] Table 1

[0059]

[0060]

[0061] The applicant declares that the detailed structural features of this utility model are illustrated through the above embodiments, but this utility model is not limited to the above detailed structural features, that is, it does not mean that this utility model must rely on the above detailed structural features to be implemented. Those skilled in the art should understand that any improvements to this utility model, equivalent substitutions of selected components, additions of auxiliary components, and selection of specific methods, etc., all fall within the protection and disclosure scope of this utility model.

[0062] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0063] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

[0064] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. A compression rate detecting apparatus characterized by comprising: The testing device includes a testing platform and a support. A pressure plate unit is mounted on the support and is located above the testing platform. The pressure plate unit includes a stress detection component. The pressure plate unit also includes a pressure plate and a transmission assembly connected to the pressure plate. The transmission assembly includes a connecting rod and a transmission part. The transmission part causes the connecting rod to move in a direction perpendicular to the test platform. The transmission part is connected to an automatic control assembly. The support frame includes a support rod and a crossbeam. The pressure plate unit is fixedly connected to the crossbeam, and the support rod is fixedly connected to the test platform.

2. The compression rate detection apparatus according to claim 1, characterized by The pressure plate is detachably connected to the connecting rod.

3. The compression ratio detection device according to claim 1, characterized in that, The testing platform is equipped with a suction component, which is used to fix the sample.

4. The compression ratio detection device according to claim 1, characterized in that, The support rods are distributed along the edge of the test platform, and the crossbeam is located above the test platform.

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