Modular rubber durometer compatible with multiple scales and control method thereof

Abstract

The application discloses a kind of modularized rubber durometer compatible with multiple scales and control method thereof, belong to measurement field.The application of a kind of modularized rubber durometer compatible with multiple scales includes: host computer, loading module, test module, auxiliary tool module and main control module, test module includes Shore A scale test module, IRHD N scale test module, IRHD H scale test module, IRHD L scale test module, IRHD M scale test module, test module can be disassembled and replaced, different test modules can be installed below each loading module, realize the hardness measurement function of Shore A scale, IRHD N scale, IRHD H scale, IRHD L scale and IRHD M scale matched with one host computer, and realize rubber hardness full-automatic test function by main control module.The application realizes the accurate positioning of rubber O-ring cross-section highest point and hardness test function, positioning accuracy is within ±0.1mm, improves the accuracy of rubber hardness test, improves the efficiency of rubber hardness test.

Description

Technical Field

[0001] This invention relates to a modular rubber hardness tester compatible with multiple scales and its control method, belonging to the field of hardness 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 modular rubber hardness tester compatible with multiple scales and its control method. The modular approach uses a main control module to control a loading module, thereby canceling the reverse test force of the main rod assembly and achieving the loading of an initial test force of (8.3±0.5) mN and a total test force of (153.3±1.0) mN. A displacement sensor accurately determines the highest point of the rubber O-ring cross-section and enables fully automated hardness testing. Furthermore, a single main unit paired with different test modules can measure hardness using Shore A, IRHD N, IRHD H, IRHD L, or IRHD M scales.

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

[0007] The present invention provides a modular rubber hardness tester compatible with multiple scales, comprising: a main unit, a loading module, a testing module, an auxiliary tooling module, and a main control module thereof;

[0008] The host includes: a chassis, a column and a lifting worktable system, used to mount the loading module, the main control module, the auxiliary tooling module and the test sample;

[0009] The loading module is mounted on the column and is used to drive the test module to move up and down;

[0010] The test module is installed on the loading module and is either a Shore A scale test module, or an IRHD N scale test module, or an IRHD H scale test module, or an IRHD L scale test module, or an IRHD M scale test module, providing five rubber hardness test methods respectively.

[0011] The auxiliary tooling module is installed on the lifting worktable system and is used for automatic measurement of rubber O-rings. It can accurately locate the highest point of the cross-section of the rubber O-ring and complete the hardness test. If the test sample is not a rubber O-ring, the auxiliary tooling module is removed and the test sample is placed directly on the lifting worktable system for testing.

[0012] The main control module is installed inside the chassis. It enables human-computer interaction through a display on the host computer. It also controls the loading module, the testing module, and the auxiliary tooling module to perform relevant actions and complete data acquisition, thereby achieving rubber hardness measurement.

[0013] Furthermore, the IRHD M scale test module in the test module includes: test module housing, position fixing block, spindle locking screw, pull plug, motor cavity, lower end of the main body, main body, displacement sensor, main rod assembly, test control module, motor assembly, and lever assembly;

[0014] 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.

[0015] 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;

[0016] 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.

[0017] 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;

[0018] 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.

[0019] Furthermore, the auxiliary tooling module includes: a housing, a laser head mounting assembly, a laser head, a worktable, a linear module, a control module, a motor, a mounting assembly, and a worktable moving assembly;

[0020] The outer casing is used to install and protect the internal structure. The laser head mounting assembly is used to mount the laser head on the outer casing. The laser head, mounted on the laser head mounting assembly, is used to read the position information of the rubber O-ring and determine the highest point of the rubber O-ring's cross-section. The worktable is mounted on the worktable moving assembly and is used to place the rubber O-ring. The linear module, driven by the motor, moves the worktable moving assembly left and right, thereby moving the rubber O-ring on the worktable left and right to determine the test position and perform hardness testing. The control module is used to control the rotation of the motor and the data acquisition and processing of the laser head. The mounting assembly is used to install the rubber O-ring hardness testing fixture.

[0021] Furthermore, the main control module is installed inside the chassis. Through the loading module, it realizes the automatic identification of the Shore A scale test module, or the IRHD N scale test module, or the IRHD H scale test module, or the IRHD L scale test module, or the IRHD M scale test module. The hardness measurement of the Shore A scale, IRHD N scale, IRHD H scale, IRHD L scale, and IRHD M scale is completed on the lifting worktable system. Through the auxiliary tooling module, the highest point of the test sample cross section is accurately determined and the hardness test is fully automated.

[0022] Furthermore, the control method of the modular rubber hardness tester compatible with multiple scales of the present invention specifically includes the following steps:

[0023] Step 1: Install the Shore A ruler test module, or the IRHD N ruler test module, or the IRHD H ruler test module, or the IRHD L ruler test module, or the IRHD M ruler test module on the loading module.

[0024] Step 2: Place the test sample on the lifting platform system;

[0025] Step 3: The main control module identifies the type of the test module and starts the measurement through the host computer;

[0026] Step 4: The main control module drives the loading module to press down the test module through the motor, so that the test module moves and contacts the test sample on the lifting platform system, and different controls are implemented according to different test modules;

[0027] Step 5: After the test module finishes its operation, the main control module collects the data from the displacement sensor, calculates the hardness of the test sample, and displays it on the host computer.

[0028] Step Six: The main control module drives the loading module via the motor to return the test module to its initial position;

[0029] Step 7: Install the auxiliary tooling module. The corresponding test module needs to be replaced with the IRHD M scale test module, and the test sample should be placed in it.

[0030] Step 8: Observe whether the worktable on the auxiliary tooling module is in the initial position. If not, the worktable needs to be returned to the initial position by the host computer.

[0031] Step 9: Start measurement. The main control module controls the worktable on the auxiliary tooling module to make the laser head measure the highest point of the test sample and move the highest point of the test sample to the IRHD M scale test module.

[0032] Step 10: The main control module controls the loading module to press down the IRHD M scale test module through the motor, and measures the hardness value of the test sample;

[0033] Step 11: Using the host computer, the main control module returns the worktable on the auxiliary tooling module to its initial position.

[0034] Furthermore, the control method for the auxiliary tooling module is as follows:

[0035] When the laser head does not detect the rubber O-ring, the height h detected by the laser head is... a for h a =H±a;

[0036] Where H is the height of the laser head from the worktable, and a is a constant related to the measurement accuracy, |a|<0.008mm;

[0037] When the laser head detects the rubber O-ring, the height h detected by the laser head is... b for h b =H-d'±a;

[0038] Wherein, d' is the diameter of the cross-section of the rubber O-ring detected by the laser head;

[0039] During the inspection of the rubber O-ring, the control module obtains a set of height data {h} of the laser head. b1 ,h b2 ,h b3 …h bn}, synchronously, the control module obtains a set of displacement data {l} of the motor driving the worktable to move. a1 ,l a2 ,l a3 …l an The two sets of data correspond one-to-one, and the height h is detected by the laser head. b The positioning is converted into the displacement l that the motor needs to move. a After obtaining the data, there are three possible scenarios:

[0040] Scenario 1: The highest point of the cross-section of the rubber O-ring is a fixed value. By comparing adjacent data, if the first h... bn Compared to the second h n+1 If the value is large, swap the two data points, repeat the process, and determine the maximum height data h. bmax ;

[0041] The second scenario: The highest point of the rubber O-ring is a plane. By comparing adjacent data, a set of maximum heights {h} is obtained. bmax1 ,h bmax2 ,h bmax3 …h bmaxn}, thus obtaining displacement data {l} corresponding one-to-one with the maximum height. amax1 ,l amax2 ,l amax3 …l amaxn}, through the maximum value l in the displacement data amax With minimum value l amin If the distance between the two is less than 5mm, the height distance corresponding to the middle value of the data set is taken as the highest point of the rubber O-ring; if the distance between the two is more than 5mm, it is judged as abnormal.

[0042] In the third scenario, there are no test samples on the worktable, and the laser head obtains a set of height data {h}. b1 ,h b2 ,h b3 …h bn}, where any height data h b If any value is more than 1 mm larger than H, it is considered abnormal, and the worktable stops moving and returns to its initial position.

[0043] Furthermore, the control steps of the auxiliary tooling module are as follows:

[0044] Step 1: Check if the workbench is in its initial position. If not, use the control module to interact with the machine and restore the workbench to its initial position.

[0045] Step 2: Place the rubber O-ring onto the etched line on the worktable;

[0046] Step 3: Interact with the control module and select "Start Rubber O-ring Hardness Measurement";

[0047] Step 4: The workbench moves via the linear module, which accelerates to a certain speed and then maintains a constant speed.

[0048] Step 5: When the rubber O-ring moves under the laser head, the control module reads the distance information and the position information of the linear module on the laser head, records the point information of the cross-section of the rubber O-ring and the position information of the linear module, until all the point information of the cross-section of the rubber O-ring is recorded, and obtains a table of correspondence between the point information of the cross-section of the rubber O-ring and the position of the linear module, and then obtains the highest point of the cross-section of the rubber O-ring.

[0049] Step Six: Once the cross-sectional area of ​​the rubber O-ring has been measured, the control module determines the final stroke;

[0050] Step 7: The control module controls the linear module to send the worktable to the designated position and start the hardness value measurement;

[0051] Step 8: After the hardness value of the rubber O-ring is measured, the worktable is restored to its initial position through human-machine interaction via the control module (6).

[0052] Beneficial effects:

[0053] 1. The present invention provides a modular rubber hardness tester compatible with multiple scales and its control method. By adopting a modular approach, the test modules can be disassembled and replaced. Different test modules are installed under each loading module, realizing the hardness measurement function of one host unit with Shore A scale, IRHD N scale, IRHD H scale, IRHD L scale and IRHD M scale.

[0054] 2. The present invention provides a modular rubber hardness tester compatible with multiple scales and its control method, which uniformly schedules the measurement process of each test module through a main control module, displays the test results of each module, realizes comprehensive control of each module, and achieves fully automatic hardness testing function.

[0055] 3. The present invention provides a modular rubber hardness tester compatible with multiple scales and its control method, which provides a Shore A scale test module, an IRHD N scale test module, an IRHD H scale test module, an IRHD L scale test module, an IRHD M scale test module, and a test method.

[0056] 4. The present invention provides a modular rubber hardness tester compatible with multiple scales and its control method. The IRHD M scale test module uses a motor assembly to drive a lever assembly to cancel the reverse test force of the main rod assembly. A rolling bearing is provided between the lever assembly and the main rod assembly to achieve point contact, thereby reducing friction and ensuring the accuracy of the test force. It ensures the accuracy of the initial test force of 8.3mN, and achieves 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 reading and processing of displacement sensor data and the overall control of the main control module, fully automatic IRHD M scale hardness testing is achieved, and the accuracy of the test results is guaranteed.

[0057] 5. The present invention provides a modular rubber hardness tester compatible with multiple scales and its control method, which realizes the precise positioning of the highest point of the cross-section of the test sample including the rubber O-ring and the fully automatic measurement of hardness test, with a positioning accuracy within ±0.1mm. This breaks through the traditional method of manual visual inspection, improves the accuracy of the test, and enhances the efficiency of the test. Attached Figure Description

[0058] Figure 1 This is a schematic diagram of the overall appearance of a modular rubber hardness tester compatible with multiple scales according to the present invention;

[0059] Figure 2 This is a schematic diagram of the overall internal structure of a modular rubber hardness tester compatible with multiple scales according to the present invention;

[0060] Figure 3 This is a schematic diagram of the main unit structure of a modular rubber hardness tester compatible with multiple scales according to the present invention.

[0061] Figure 4 This is a schematic diagram of the appearance of a modular rubber hardness tester IRHD M scale test module compatible with multiple scales according to the present invention;

[0062] Figure 5 This is a schematic diagram of the internal structure of a modular rubber hardness tester IRHD M scale testing module compatible with multiple scales according to the present invention.

[0063] Figure 6 This is a schematic diagram of the overall structure of a modular rubber hardness tester auxiliary tooling module compatible with multiple scales according to the present invention;

[0064] Figure 7This is a flowchart of a modular auxiliary tooling module method for a multi-scale rubber hardness tester according to the present invention.

[0065] Figure 8 This is a flowchart of a modular rubber hardness tester control method compatible with multiple scales according to the present invention;

[0066] In the diagram, 1-Main unit; 2-Loading module; 3-Test module; 4-Auxiliary tooling module; 5-Chassis; 6-Column; 7-Lifting worktable system; 8-Main control module; 3-1-Test module housing; 3-2-Position fixing block; 3-3-Spindle locking screw; 3-4-Pull plug; 3-5-Motor cavity; 3-6-Lower end of main body; 3-7-Main body; 3-8-Displacement sensor; 3-9-Main rod assembly; 3-10-Test control module; 3-11-Motor assembly; 3-12-Lever assembly; 4-1-Auxiliary tooling housing; 4-2-Laser head mounting assembly; 4-3-Laser head; 4-4-Worktable; 4-5-Linear module; 4-6-Auxiliary tooling control module; 4-7-Auxiliary tooling motor; 4-8-Mounting assembly; 4-9-Worktable moving assembly. Detailed Implementation

[0067] 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.

[0068] Example 1:

[0069] like Figure 1 , Figure 2 As shown, the present invention provides a modular rubber hardness tester compatible with multiple scales, comprising: a main unit 1, a loading module 2, a testing module 3, an auxiliary tooling module 4, and a main control module 8;

[0070] like Figure 3 As shown, the main unit 1 includes: a chassis 5, a column 6 and a lifting worktable system 7, which are used to carry the loading module 2, the main control module 8, the auxiliary tooling module 4 and the test sample;

[0071] The loading module 2 is installed on the column 6 and is used to drive the test module 3 to move up and down;

[0072] Test module 3 is installed on loading module 2 and provides five rubber hardness testing methods for Shore A scale test module, or IRHD N scale test module, or IRHD H scale test module, or IRHD L scale test module or IRHD M scale test module respectively.

[0073] The auxiliary tooling module 4 is installed on the lifting worktable system 7 for automatic measurement of rubber O-rings. It can accurately locate the highest point of the cross-section of the rubber O-ring and complete the hardness test. If the test sample is not a rubber O-ring, the auxiliary tooling module 4 is removed and the test sample is placed directly on the lifting worktable system 7 for testing.

[0074] The main control module 8 is installed inside the chassis 5. It realizes human-computer interaction through the display on the host 1, and performs relevant actions and completes data acquisition by controlling the loading module 2, the testing module 3 and the auxiliary tooling module 4 to realize rubber hardness measurement.

[0075] like Figure 4 , Figure 5 As shown, the IRHD M scale test module in test module 3 includes: test module housing 3-1, position fixing block 3-2, spindle locking screw 3-3, pull plug 3-4, motor cavity 3-5, lower end of main body 3-6, main body 3-7, displacement sensor 3-8, main rod assembly 3-9, test control module 3-10, motor assembly 3-11, and lever assembly 3-12;

[0076] The test module housing 3-1 is used to protect the internal structure of the test module 3. The position fixing block 3-2 is used to fix the test module 3. The spindle locking screw 3-3 is used to protect the main rod assembly 3-9 during transportation. The spindle locking screw 3-3 needs to be removed during operation. The plug 3-4 is used to install and position the test module 3. The motor cavity 3-5 is used to install and protect the motor assembly 3-11. The lower end of the main body 3-6 is used to install and protect the lever assembly 3-12. The main body 3-7 is used to install and protect the main rod assembly 3-9. The displacement sensor 3-8 is used to read the movement displacement of the main rod 3-9-7. The main rod assembly 3-9 is used to generate the test force and transmit the test force to the test sample. The test control module 3-10 is used to control the action of the test module 3 and data acquisition to complete the hardness test.

[0077] The main rod assembly 3-9 is used to generate a total test force of 153.3±1.0mN and apply the test force vertically to the test sample;

[0078] The motor assembly 3-11 provides vertical movement within a range of 1mm up and down to control the position of the lever assembly 3-12, thereby achieving accurate loading of the initial test force and the total test force;

[0079] Under the control of the motor assembly 3-11, the lever assembly 3-12 completes the contact and separation with the main rod assembly 3-9, thereby completing the loading of an initial test force of 8.3±0.5mN and a total test force of 153.3±1.0mN;

[0080] The lever assembly 3-12 and the main rod assembly 3-9 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.

[0081] like Figure 6 As shown, the auxiliary tooling module 4 includes: auxiliary tooling shell 4-1, laser head mounting assembly 4-2, laser head 4-3, worktable 4-4, linear module 4-5, auxiliary tooling control module 4-6, auxiliary tooling motor 4-7, mounting assembly 4-8, and worktable moving assembly 4-9.

[0082] The auxiliary tooling housing 4-1 is used to install and protect the internal structure of the auxiliary tooling module 4. The laser head mounting assembly 4-2 is used to mount the laser head 4-3 on the auxiliary tooling housing 4-1. The laser head 4-3 is mounted on the laser head mounting assembly 4-2 and is used to read the position information of the test sample and determine the highest point of the test sample cross-section. The worktable 4-4 is mounted on the worktable moving assembly 4-9 and is used to place the test sample. The linear module 4-5, driven by the auxiliary tooling motor 4-7, drives the worktable moving assembly 4-9 to move left and right, thereby moving the test sample on the worktable 4-4 left and right, thus completing the determination of the test position and the hardness test. The auxiliary tooling control module 4-6 is used to control the rotation of the auxiliary tooling motor 4-7 and the data acquisition and processing of the laser head 4-3. The mounting assembly 4-8 is used to install the auxiliary tooling module 4.

[0083] The main control module 8 is installed inside the chassis 5. Through the loading module 2, it realizes the automatic identification of the Shore A scale test module, or the IRDHN scale test module, or the IRDH H scale test module, or the IRDH L scale test module, or the IRDH M scale test module. The hardness measurement of the Shore A scale, IRDH N scale, IRDH H scale, IRDH L scale, and IRDH M scale is completed on the lifting worktable system 7. Through the auxiliary tooling module 4, the highest point of the test sample cross section is accurately determined and the hardness test is fully automated.

[0084] The control method for auxiliary tooling module 4 is as follows:

[0085] When laser head 4-3 does not detect the rubber O-ring, the height h detected by laser head 4-3 is... a for h a =H±a;

[0086] Where H is the height from laser head 4-3 to worktable 4-4, and a is a constant related to measurement accuracy, |a|<0.008mm;

[0087] When laser head 4-3 detects the rubber O-ring, the height h detected by laser head 4-3 is... b for h b =H-d'±a;

[0088] Where d' is the cross-sectional diameter of the rubber O-ring detected by laser head 4-3;

[0089] During the inspection of the rubber O-ring, the control module 4-6 obtains a set of height data {h} from the laser head 4-3. b1 ,h b2 ,h b3 …h bn}, synchronously, the control module 4-6 obtains a set of displacement data {l} showing the movement of the worktable 4-4 driven by the motor 4-7. a1 ,l a2 ,l a3 …l an The two sets of data correspond one-to-one, and the height h is detected by laser head 4-3. b The positioning is converted into the displacement l that motors 4-7 need to move. a After obtaining the data, there are three possible scenarios:

[0090] Scenario 1: The highest point of the cross-section of the rubber O-ring is a fixed value. By comparing adjacent data, if the first h... bn Compared to the second h n+1 If the value is large, swap the two data points, repeat the process, and determine the maximum height data h. bmax ;

[0091] The second scenario: The highest point of the rubber O-ring is a plane. By comparing adjacent data, a set of maximum heights {h} is obtained. bmax1 ,h bmax2 ,h bmax3 …h bmaxn}, thus obtaining displacement data {l} corresponding one-to-one with the maximum height. amax1 ,l amax2 ,l amax3 …l amaxn}, through the maximum value l in the displacement data amax With minimum value l amin If the distance between the two is less than 5mm, the height distance corresponding to the middle value of the data set is taken as the highest point of the rubber O-ring; if the distance between the two is more than 5mm, it is judged as abnormal.

[0092] In the third scenario, there are no test samples on workbench 4-4, and laser head 4-3 obtains a set of height data {h}. b1 ,h b2 ,h b3 …h bn}, where any height data hb If any value is more than 1mm larger than H, it is considered abnormal, and worktable 4-4 stops moving and returns to its initial position.

[0093] like Figure 7 As shown, the control steps of auxiliary tooling module 4 are as follows:

[0094] Step 1: Check if the workbench 4-4 is in the initial position. If it is not in the initial position, use the control module 4-6 to perform human-machine interaction to restore the workbench 4-4 to the initial position.

[0095] Step 2: Place the rubber O-ring on the 4-4 mark line of the worktable;

[0096] Step 3: Interact with the human-computer interface through control modules 4-6 and select "Start Rubber O-ring Hardness Measurement";

[0097] Step 4: The workbench 4-4 moves via the linear module 4-5. After the linear module 4-5 accelerates to a certain speed, it maintains a constant speed.

[0098] Step 5: When the rubber O-ring moves under the laser head, the control module 4-6 reads the distance information on the laser head and the position information of the linear module, records the point information of the cross-section of the rubber O-ring and the position information of the linear module, until all the point information of the cross-section of the rubber O-ring is recorded, and obtains a table of correspondence between the point information of the cross-section of the rubber O-ring and the position of the linear module 4-5, and then obtains the highest point of the cross-section of the rubber O-ring.

[0099] Step 6: After the cross-sectional area of ​​the rubber O-ring is measured, control module 4-6 determines the final stroke;

[0100] Step 7: Control module 4-6 controls linear module 4-5 to send worktable 4-4 to the designated position to start hardness value measurement;

[0101] Step 8: After the hardness value of the rubber O-ring is measured, the worktable 4-4 is restored to its initial position through human-machine interaction via the control module 4-6.

[0102] This invention provides a modular rubber hardness tester compatible with multiple scales, such as... Figure 8 As shown, the control method includes the following steps:

[0103] Step 1: Install the Shore A ruler test module, or the IRHD N ruler test module, or the IRHD H ruler test module, or the IRHD L ruler test module, or the IRHD M ruler test module on the loading module 2.

[0104] Step 2: Place the test sample on the lifting platform system 7;

[0105] Step 3: The main control module 8 identifies the type of the test module 3 and starts the measurement through the host 1;

[0106] Step 4: The main control module 8 drives the loading module 2 to press down the test module 3 through the motor, so that the test module 3 moves and contacts the test sample on the lifting platform system 7. Different controls are achieved according to different test modules 3.

[0107] Step 5: After the test module 3 finishes its operation, the main control module 8 collects data from displacement sensors 3-8, obtains the hardness of the test sample, and displays it on the host 1.

[0108] Step Six: The main control module 8 uses the motor to drive the loading module 2 to return the test module 3 to its initial position;

[0109] Step 7: Install auxiliary tooling module 4. The corresponding test module 3 needs to be replaced with the IRHD M scale test module, and the test sample should be placed in it.

[0110] Step 8: Observe whether the worktable 4-4 on the auxiliary tooling module 4 is in the initial position. If not, the worktable 4-4 needs to be returned to the initial position through the host 1.

[0111] Step 9: Start measurement. The main control module 8 controls the worktable 4-4 on the auxiliary tooling module 4 to make the laser head 4-3 measure the highest point of the test sample and move the highest point of the test sample to the IRHD M scale test module.

[0112] Step 10: The main control module 8 controls the loading module 2 to press down the IRHD M scale test module through the motor 3-11-8 to measure the hardness value of the test sample;

[0113] Step 11: Using host 1, the main control module 8 returns the worktable 4-4 on the auxiliary tooling module 4 to its initial position.

[0114] The test force, indentation depth, and hardness indication of the modular rubber hardness tester compatible with multiple scales and its control method of the present invention were calibrated. The calibration results are shown in Tables 1 to 3.

[0115] Table 1 Test Force Calibration Results

[0116]

[0117] Table 2. Calibration results of indentation depth

[0118]

[0119] Table 3. Calibration Results of Hardness Indication Values

[0120]

[0121] As shown in Tables 1 to 3, the modular rubber hardness tester compatible with multiple scales and its control method of the present invention fully meet the requirements of national regulations and international standards.

[0122] 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 multi-scale compatible modular rubber durometer, characterized by: Comprise: Host (1), loading module (2), test module (3), auxiliary tooling module (4) and its main control module (8); The host (1) comprises: cabinet (5), column (6) and lifting workbench system (7), for carrying loading module (2), main control module (8), auxiliary tooling module (4) and test sample; The loading module (2) is installed on the column (6), for driving the test module (3) to move up and down; The test module (3) is installed on the loading module (2), which is Shore A scale test module, or IRHD N scale test module, or IRHD H scale test module, or IRHD L scale test module or IRHD M scale test module, which provides five kinds of rubber hardness test methods respectively; The auxiliary tooling module (4) is installed on the lifting workbench system (7), for automatic measurement of rubber O-ring, which can accurately position the highest point of the cross section of the rubber O-ring and complete the hardness test, if the test sample is not rubber O-ring, the auxiliary tooling module (4) is removed, and the test sample is directly placed on the lifting workbench system (7) for testing; The main control module (8) is installed in the cabinet (5), which is displayed on the host (1), realizes man-machine interaction, controls the loading module (2), test module (3) and auxiliary tooling module (4), executes related actions and completes data acquisition, realizes rubber hardness measurement; The IRHD M scale test module in the test module (3) comprises: test module shell (3-1), position fixing block (3-2), main shaft locking screw (3-3), plug-in component (3-4), motor cavity (3-5), main body lower end (3-6), main body (3-7), displacement sensor (3-8), main rod assembly (3-9), test control module (3-10), motor assembly (3-11) and lever assembly (3-12); The test module shell (3-1) is used to protect the internal structure of the test module, the position fixing block (3-2) is used to fix the test module (3), the main shaft locking screw (3-3) is used to protect the main rod assembly (3-9) during transportation, and the main shaft locking screw (3-3) needs to be removed during the working process, the plug-in component (3-4) is used to install and position the test module, the motor cavity (3-5) is used to install and protect the motor assembly (3-11), the main body lower end (3-6) is used to install and protect the lever assembly (3-12), the main body (3-7) is used to install and protect the main rod assembly (3-9), the displacement sensor (3-8) is used to read the movement displacement of the main rod assembly (3-9), the main rod assembly (3-9) is used to generate a test force and transmit the test force to a test sample, the test control module (3-10) is used to control the action of the test module (3) and data acquisition to complete the hardness test, and the motor assembly (3-11) is used to control the lever assembly (3-12) to offset part of the test force generated by the main rod assembly (3-9) to complete the loading of the initial test force of 8.3±0.5mN, and then the control lever assembly (3-12) is separated from the main rod assembly (3-9), so that the test force of 153.3±1.0mN generated by the main rod assembly (3-9) is completely applied to the test sample to complete the secondary loading; The main rod assembly (3-9) is used to generate a total test force of 153.3±1.0mN and apply the test force vertically to a test sample; The motor assembly (3-11) provides vertical movement within a range of 1mm up and down, and is used to control the position of the lever assembly (3-12), so as to realize accurate loading of the initial test force and the total test force; The lever assembly (3-12) is controlled by the motor assembly (3-11) to complete contact and separation with the main rod assembly (3-9), so as to complete the loading of the initial test force of 8.3±0.5mN and the loading of the total test force of 153.3±1.0mN; The lever assembly (3-12) and the main rod assembly (3-9) are connected by a rolling bearing to reduce the friction generated by contact, so as to realize accurate generation and loading of the initial test force of 8.3±0.5mN; The auxiliary tool module (4) comprises an auxiliary tool shell (4-1), a laser head installation assembly (4-2), a laser head (4-3), a workbench (4-4), a linear module (4-5), an auxiliary tool control module (4-6), an auxiliary tool motor (4-7), an installation assembly (4-8), and a workbench moving assembly (4-9). The auxiliary tool shell (4-1) is used to install and protect the internal structure of the auxiliary tool module (4), the laser head mounting assembly (4-2) is used to install the laser head (4-3) on the auxiliary tool shell (4-1), the laser head (4-3) is installed on the laser head mounting assembly (4-2), and is used to read the position information of the test sample, determine the highest point of the cross section of the test sample, the workbench (4-4) is installed on the workbench moving assembly (4-9), and is used to place the test sample, the linear module (4-5) drives the workbench moving assembly (4-9) to move left and right under the drive of the auxiliary tool motor (4-7), so as to drive the test sample on the workbench (4-4) to move left and right, so as to complete the determination of the test position and the hardness test, the auxiliary tool control module (4-6) is used to control the rotation of the auxiliary tool motor (4-7) and the data acquisition and processing of the laser head (4-3), and the mounting assembly (4-8) is used to install the auxiliary tool module (4); The main control module (8) realizes automatic identification of the Shore A scale test module, or the IRHD N scale test module, or the IRHD H scale test module, or the IRHD L scale test module or the IRHD M scale test module through the loading module (2), and completes hardness measurement of the Shore A scale, the IRHD N scale, the IRHD H scale, the IRHD L scale and the IRHD M scale on the lifting workbench system (7). The highest point of the cross section of the test sample is accurately determined and the full-automatic measurement of the hardness test is realized through the auxiliary tool module (4).

2. A method of controlling a multi-scale compatible modularized rubber durometer based on the multi-scale compatible modularized rubber durometer as claimed in claim 1, characterized in that: The method comprises the following steps: Step one: install the Shore A scale test module, or the IRHD N scale test module, or the IRHD H scale test module, or the IRHD L scale test module or the IRHD M scale test module on the loading module (2); Step two: place the test sample on the lifting workbench system (7); Step three: the main control module (8) identifies the type of the test module (3), and starts measurement through the host computer (1); Step four: the main control module (8) drives the loading module (2) to press down the test module (3) through the motor assembly (3-11), realizes movement and contact of the test module (3) on the test sample on the lifting workbench system (7), and realizes different controls according to different test modules (3); Step five: the test module (3) ends the action, the main control module (8) collects data of the displacement sensor (3-8), obtains the hardness of the test sample, and displays on the host computer (1); Step six: the main control module (8) drives the loading module (2) to return the test module (3) to the initial position through the motor assembly (3-11); Step seven: install the auxiliary tool module (4), replace the corresponding test module (3) with the IRHD M scale test module, and place the test sample; Step eight: observe whether the workbench (4-4) on the auxiliary tool module (4) is at the initial position, if not, return the workbench (4-4) to the initial position through the host computer (1). Step nine: start measurement, the main control module (8) controls the workbench (4-4) on the auxiliary tooling module (4), so that the laser head (4-3) measures the highest point of the test sample, and the highest point of the test sample is moved to the IRHD M scale test module; Step ten: the main control module (8) controls the loading module (2) to press down the IRHD M scale test module through the motor assembly (3-11), and the hardness value of the test sample is measured; Step eleven: through the host computer (1), the main control module (8) returns the workbench (4-4) on the auxiliary tooling module (4) to the initial position.

3. A multi-scale compatible modularized rubber durometer control method according to claim 2, characterized in that: The control method of the auxiliary tooling module (4) is: When the laser head (4-3) does not detect the rubber O-ring, the height h detected by the laser head (4-3) a is h a = H ± a; Wherein, H is the height of the laser head (4-3) to the workbench (4-4), a is a constant, which is related to the measurement accuracy, and |a|<0.008mm; When the laser head (4-3) detects the rubber O-ring, the height h detected by the laser head (4-3) b is h b = H - d' ± a; Wherein, d' is the cross-sectional diameter of the rubber O-ring detected by the laser head (4-3); In the process of detecting rubber O-ring, the auxiliary tool control module (4-6) obtains a set of height data {h b1 , h b2 , h b3 …h bn} of a set of laser heads (4-3), synchronously, the auxiliary tool control module (4-6) obtains a set of displacement data {l a1 , l a2 , l a3 …l an} of the movement of the workbench (4-4) driven by a set of auxiliary tool motors (4-7), the two sets of data correspond to each other, through the positioning of the height h b detected by the laser head (4-3), the displacement amount l a required for the auxiliary tool motor (4-7) to move is converted, and after obtaining the data, three cases are divided: The first case: the rubber O-ring cross section is a certain value, the highest point of the comparison of adjacent data, if the first h bn is greater than the second h bn+1 , then exchange the two data, loop execution, determine the maximum height data h bmax ; Second case: the highest point of rubber O-ring is a plane, by comparing adjacent data, a set of maximum height {h bmax1 , h bmax2 , h bmax3 …h bmaxn} is obtained, and displacement data {l amax1 , l amax2 , l amax3 …l amaxn} corresponding to the maximum height is obtained, by comparing the maximum value l amax and the minimum value l amin in the displacement data, if the distance between the two is not more than 5mm, the height distance corresponding to the middle value in the set of data is taken as the highest point of the rubber O-ring, if the distance between the two exceeds 5mm, it is determined as abnormal; The third case, the worktable (4-4) without any test sample, the laser head (4-3) to get a set of height data{h b1 ,h b2 , h b3 …h bn},where any height data h b more than 1mm than H, then determine the abnormal, the worktable (4-4) stop moving and return to the initial position.

4. A multi-scale compatible modularized rubber durometer control method according to claim 2, wherein: The control steps of the auxiliary tooling module (4) are: Step one: check whether the workbench (4-4) is at the initial position, if not, carry out human-computer interaction through the auxiliary tooling control module (4-6) to restore the workbench (4-4) to the initial position; Step two: place the rubber O-ring on the workbench (4-4) on the line; Step three: carry out human-computer interaction through the auxiliary tooling control module (4-6) to select to start the rubber O-ring hardness measurement; Step four: the workbench (4-4) moves through the linear module (4-5), and the linear module (4-5) experiences acceleration to reach a certain speed and then keeps uniform speed running; Step five: when the rubber O-ring moves to the laser head (4-3), the auxiliary tooling control module (4-6) records the point information of the rubber O-ring cross section and the position information of the linear module (4-5) by reading the distance information of the laser head (4-3) and the position information of the linear module (4-5), until all the point information of the rubber O-ring cross section is recorded, a rubber O-ring cross section point information and linear module (4-5) position corresponding table is obtained, and then the highest point of the rubber O-ring cross section is obtained; Step six: when the rubber O-ring cross section measurement is completed, the auxiliary tooling control module (4-6) determines the final stroke; Step seven: the auxiliary tooling control module (4-6) controls the linear module (4-5) to send the workbench (4-4) to the specified position, and starts the hardness value measurement; Step eight: after the rubber O-ring hardness value measurement is completed, carry out human-computer interaction through the auxiliary tooling control module (4-6) to restore the workbench (4-4) to the initial position.

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