A miniature rubber international hardness test module and a control method thereof

Abstract

The application discloses a micro rubber international hardness test module and a control method thereof, and belongs to the field of measurement. The application comprises a shell, a position fixing block, a main shaft locking screw, a pull-out plug, a motor cavity, a main body lower end, a main body, a displacement sensor, a main shaft assembly, a control module, a motor assembly, a lever assembly and the control module. A test force is generated through the main rod assembly, the lever assembly is controlled through the motor assembly to offset part of the test force generated by the main rod assembly, the loading of the initial test force of 8.3±0.5 mN is completed, the lever assembly is controlled to be separated from the main rod assembly, the test force of 153.3±1.0 mN generated by the main rod assembly is completely applied to the sample, and the secondary loading is completed. The application realizes the offset of the reverse test force of the main rod assembly through the motor assembly driving the lever assembly, realizes the full-automatic micro rubber international hardness test through the overall control of the displacement sensor and the control module, and guarantees the accuracy of test results.

Description

Technical Field

[0001] This invention relates to a miniature rubber international hardness testing module and its control method, belonging to the field of metrology. Background Technology

[0002] Micro rubber hardness testing is mainly used for testing the micro rubber hardness of various types of O-rings and rubber parts with characteristics such as small size and thinness.

[0003] According to common knowledge in the fields of operating conditions and hardness, the hardness test of rubber O-rings should be carried out at the highest point of its cross-section. Currently, in China, the highest point of the cross-section of rubber O-rings is determined by manual visual inspection, which introduces a lot of error and is inefficient.

[0004] Currently, most Shore A hardness testing equipment in China is handheld, which is insufficient to meet the requirements of daily testing and metrology. Furthermore, there are no domestically produced IRHD M and IRHD N hardness testing devices; all rely on imports. Summary of the Invention

[0005] The purpose of this invention is to provide a miniature rubber international hardness testing module and its control method, which can accurately and reliably apply an initial test force of (8.3±0.5)mN and a total test force of (153.3±1.0)mN, realize fully automatic rubber hardness testing, and ensure the accuracy of the test results.

[0006] The objective of this invention is achieved through the following technical solution:

[0007] The present invention provides a miniature rubber hardness testing module, comprising: a shell, a position fixing block, a main shaft locking screw, a pull plug, a motor cavity, a lower end of the main body, a main body, a displacement sensor, a main rod assembly, a control module, a motor assembly, and a lever assembly;

[0008] The outer shell protects the internal structure; the positioning block secures the micro rubber hardness testing module; the main shaft locking screw protects the main rod assembly during transport and must be removed during operation; the pull plug installs and positions the micro rubber hardness testing module; the motor cavity houses and protects the motor assembly; the lower end of the main body houses and protects the lever assembly; the main body houses and protects the main rod assembly; the displacement sensor reads the displacement of the main rod assembly; the main rod assembly generates the test force and transmits it to the test sample; the control module controls the movement of the micro rubber hardness testing module and collects data; the motor assembly controls the lever assembly to offset part of the test force generated by the main rod assembly, completing the initial test force loading of 8.3±0.5mN; then, the lever assembly is disengaged from the main rod assembly, allowing the test force of 153.3±1.0mN generated by the main rod assembly to be fully applied to the test sample, completing the secondary loading.

[0009] The main rod assembly is used to generate a total test force of 153.3 ± 1.0 mN and apply the test force vertically to the test sample;

[0010] The motor assembly provides vertical movement within a range of 1mm up and down to control the position of the lever assembly, thereby achieving accurate loading of the initial test force and the total test force.

[0011] Under the control of the motor assembly, the lever assembly completes the contact and separation with the main rod assembly, thereby completing the loading of an initial test force of 8.3±0.5mN and a total test force of 153.3±1.0mN;

[0012] The lever assembly and the main rod assembly are connected by a rolling bearing to reduce the frictional force generated by contact, thereby achieving accurate generation and loading of the initial test force of 8.3±0.5mN.

[0013] The present invention discloses a miniature rubber international hardness testing module, the control method of which includes the following steps:

[0014] Step 1: Connect the control module to the main control system of the international rubber hardness tester and identify this test module;

[0015] Step 2: Place the test sample on the main platform of the international rubber hardness tester, and start the hardness measurement process through the human-computer interaction interface of the international rubber hardness tester;

[0016] Step 3: This test module performs a self-test. The motor assembly starts to rotate, the lever assembly is pressed down and then restored, and the motor assembly stops rotating.

[0017] Step 4: The mainframe platform of the rubber international hardness tester controls the downward pressure of this test module. When the test sample contacts the pressure foot and the main rod assembly achieves an initial test force of (8.3 ± 0.5) mN, and the distance that the main rod assembly presses downward is L (380 um < L < 400 um), stop pressing downward;

[0018] Step 5: Wait for the main rod assembly to achieve an initial test force of (8.3 ± 0.5) mN and make this test module reach a stable state;

[0019] Step 6: The motor assembly starts to rotate, the lever assembly presses downward, and the main rod assembly realizes the loading of a total test force of (153.3 ± 1.0) mN;

[0020] Step 7: The mainframe platform of the rubber international hardness tester realizes data acquisition through the control module, determines the hardness value of the test sample by looking up the table and comparing with the approximate average value, and completes the micro rubber international hardness verification;

[0021] Step 8: The motor assembly starts to rotate, the lever assembly returns to balance, and the motor assembly returns to the initial position.

[0022] Beneficial effects:

[0023] 1. For a micro rubber international hardness test module of the present invention, the motor assembly drives the lever assembly to complete the cancellation of the reverse test force of the main rod assembly, realizes the loading of an initial test force of (8.3 ± 0.5) mN and a total test force of (153.3 ± 1.0) mN. Through the data acquisition and processing of the displacement sensor and the overall control of the control module, it realizes the full-automatic micro rubber international hardness test and ensures the accuracy of the hardness test result.

[0024] 2. For a micro rubber international hardness test module of the present invention, a rolling bearing is used to connect the main rod assembly and the lever assembly, reducing the friction generated by contact and ensuring the accuracy of the application of an initial test force of 8.3 mN. Description of the drawings

[0025] Figure 1 is the overall structure external view schematic diagram of a micro rubber international hardness test module of the present invention;

[0026] Figure 2 is the internal structure schematic diagram of a micro rubber international hardness test module of the present invention;

[0027] Figure 3 is the control method flow chart of a micro rubber international hardness test module of the present invention;

[0028] The components are as follows: 1-outer shell; 2-position fixing block; 3-main shaft locking screw; 4-pull plug; 5-motor cavity; 6-lower end of main body; 7-main body; 8-displacement sensor; 9-main rod assembly; 10-control module; 11-motor assembly; 12-lever assembly. Detailed Implementation

[0029] To better illustrate the purpose and advantages of the present invention, the invention will be further described below in conjunction with the accompanying drawings and examples.

[0030] Example 1:

[0031] like Figure 1 , Figure 2 As shown, a miniature rubber hardness testing module of the present invention includes: a shell 1, a position fixing block 2, a main shaft locking screw 3, a pull plug 4, a motor cavity 5, a lower end of the main body 6, a main body 7, a displacement sensor 8, a main rod assembly 9, a control module 10, a motor assembly 11, and a lever assembly 12.

[0032] The outer shell 1 is used to protect the internal structure; the position fixing block 2 is used to fix the micro rubber international hardness testing module; the main shaft locking screw 3 is used to protect the main rod assembly 9 during transportation. During operation, the main shaft locking screw 3 needs to be removed; the plug 4 is used to install and position the micro rubber international hardness testing module; the motor cavity 5 is used to install and protect the motor assembly 11; the lower end of the main body 6 is used to install and protect the lever assembly 12; the main body 7 is used to install and protect the main rod assembly 9; the displacement sensor 8 is used to read the movement displacement of the main rod assembly 9; the main rod assembly 9 is used to generate the test force and transmit the test force to the test sample; the control module 10 is used to control the action of the micro rubber international hardness testing module and collect data; the motor assembly 11 is used to control the lever assembly 12 to offset part of the test force generated by the main rod assembly 9, and complete the initial test force loading of (8.3±0.5)mN. Then, the control lever assembly 12 is disengaged from the main rod assembly 9, so that the test force generated by the main rod assembly 9 is fully applied to the test sample, and the secondary loading is completed.

[0033] The main rod assembly 9 is used to generate a test force of (153.3±1.0) mN and apply the test force vertically to the test sample;

[0034] The motor assembly 11 provides vertical movement within a range of 1 mm up and down to control the position of the lever assembly 12, thereby achieving accurate loading of the initial test force and the total test force;

[0035] Under the control of the motor assembly 11, the lever assembly 12 completes the contact and separation with the main rod assembly 9, thereby completing the loading of an initial test force of (8.3±0.5)mN and a total test force of (153.3±1.0)mN.

[0036] The lever assembly 12 and the main rod assembly 9 are connected by a rolling bearing to reduce the frictional force generated by contact and achieve the accurate generation and loading of the initial test force of 8.3 ± 0.5 mN.

[0037] As Figure 3 shown, a control method for a micro rubber international hardness test module of the present invention includes the following steps:

[0038] Step 1: Connect to the total control system of the rubber international hardness tester through the control module 10 to identify this test module;

[0039] Step 2: Place the test sample on the main platform of the rubber international hardness tester, and start the hardness measurement process through the human-machine interaction interface of the rubber international hardness tester;

[0040] Step 3: The test module performs self-checking, the motor assembly 11 starts to rotate, the lever assembly 12 presses down and returns, and the motor assembly 11 stops rotating;

[0041] Step 4: The main platform of the rubber international hardness tester controls this test module to press down. When the test sample contacts the pressing foot 9-10 and the main rod assembly 9 achieves an initial test force of (8.3 ± 0.5) mN, and the distance that the main rod assembly 9 presses down is L (380 μm < L < 400 μm), stop pressing down;

[0042] Step 5: Wait for the main rod assembly 9 to achieve an initial test force of (8.3 ± 0.5) mN and make this test module reach a stable state;

[0043] Step 6: The motor assembly 11 starts to rotate, the lever assembly 12 presses down, and the main rod assembly 9 achieves the loading of the total test force of (153.3 ± 1.0) mN;

[0044] Step 7: The main platform of the rubber international hardness tester realizes data acquisition through the control module 10, determines the hardness value of the test sample by looking up the table and comparing with the approximate mean value, and completes the micro rubber international hardness verification;

[0045] Step 8: The motor assembly 11 starts to rotate, the lever assembly 12 restores balance, and the motor assembly 11 returns to the initial position.

[0046] The test force, indentation depth, and hardness indication of a micro rubber international hardness test module and its control method of the present invention are calibrated, and the calibration results are shown in Tables 1 to 3:

[0047] Table 1 Test force calibration results

[0048]

[0049] Table 2 Indentation depth calibration results

[0050]

[0051] Table 3. Calibration Results of Hardness Indication Values

[0052]

[0053] As shown in Tables 1 to 3, the micro rubber international hardness testing module and its control method of the present invention fully meet the requirements of national regulations and international standards.

[0054] The above detailed description further illustrates the purpose, technical solution, and beneficial effects of the invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A micro rubber international hardness test module characterized by: Comprise: Housing (1), position fixed block (2), main shaft locking screw (3), plug-in component (4), motor cavity (5), main body lower end (6), main body (7), displacement sensor (8), main rod assembly (9), control module (10), motor assembly (11) and lever assembly (12); Housing (1) is used for protecting the internal structure, position fixed block (2) is used for fixing the miniature rubber international hardness test module, main shaft locking screw (3) is used for protecting main rod assembly (9) during transportation, main shaft locking screw (3) needs to be removed during working process, plug-in component (4) is used for installing and positioning miniature rubber international hardness test module, motor cavity (5) is used for installing and protecting motor assembly (11), main body lower end (6) is used for installing and protecting lever assembly (12), main body (7) is used for installing and protecting main rod assembly (9), displacement sensor (8) is used for reading the movement displacement of main rod assembly (9), control module (10) is used for controlling the action of miniature rubber international hardness test module and collecting data, motor assembly (11) is used for controlling lever assembly (12), offsetting part of the test force generated by main rod assembly (9), completing the initial test force loading of 8.3±0.5mN, and then controlling lever assembly (12) to separate from main rod assembly (9), so that the test force of 153.3±1.0mN generated by main rod assembly (9) is completely applied to the test sample, completing secondary loading; Main rod assembly (9) is used for generating total test force of 153.3±1.0mN and vertically applying the test force to the test sample; Motor assembly (11) provides vertical movement within 1mm range, which is used for controlling the position of lever assembly (12), so as to realize accurate loading of initial test force and total test force; Lever assembly (12) is controlled by motor assembly (11) to complete contact and separation with main rod assembly (9), so as to complete the initial test force loading of 8.3±0.5mN and make main rod assembly (9) complete total test force loading of 153.3±1.0mN; Rolling bearing is used to connect lever assembly (12) and main rod assembly (9), so as to reduce the friction generated by contact and realize accurate generation and loading of initial test force of 8.3±0.5mN.

2. A control method of a micro rubber international hardness testing module, based on a micro rubber international hardness testing module as claimed in claim 1, characterized in that, Comprise the following steps: Step one: through the connection of control module (10) and total control system of rubber international hardness tester, identify the test module; Step two: place the test sample on the host platform of rubber international hardness tester, start hardness measurement process through the man-machine interface of rubber international hardness tester; Step three: self-checking of the test module, motor assembly (11) starts to rotate, lever assembly (12) is pressed down and restored, and motor assembly (11) stops rotating; Step four: the host platform of rubber international hardness tester controls the test module to press down, when the test sample contacts the pressure and main rod assembly (9) realizes initial test force of 8.3±0.5mN, and the distance L of main rod assembly (9) pressing down is 380um Step five: wait for the main rod assembly (9) to achieve 8.3±0.5mN initial test force and make the test module reach a steady state; Step six: the motor assembly (11) starts to rotate, the lever assembly (12) is separated from the main rod assembly (9), and the main rod assembly (9) achieves the loading of 153.3±1.0mN total test force; Step seven: the main machine platform of the rubber international hardness tester realizes data acquisition through the control module (10), and the hardness value of the test sample is determined by looking up the table and the similar average value, completing the micro rubber international hardness calibration; Step eight: the motor assembly (11) starts to rotate, the lever assembly (12) restores the balance, and the motor assembly (11) returns to the initial position.

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