Constant pressure fitting type ball mode wear resistance performance testing device

Abstract

The utility model relates to ball mould wear resistance test technical field, and disclose a kind of constant-pressure conformal ball mould wear resistance test device, including work bench and ball head measured piece;The top of work bench is fixedly connected with dust collection box;The bottom of dust collection box inner chamber is fixedly connected with multiple vertical guide columns, the surface of each vertical guide column is slidably connected with floating seat, and there is tension spring between floating seat and vertical guide column, one end of tension spring is fixedly connected with one end of vertical guide column, the other end is fixedly connected with floating seat, the bottom of floating seat is fixedly connected with ball mould, the top of ball mould is provided with counterweight weight, and the gravity of counterweight weight and the elasticity of tension spring cooperate, so that ball mould constant-pressure conformal ball head measured piece;The top of work bench is provided with driving structure, for driving ball head measured piece rotates around its own axis.

Description

Technical Field

[0001] This utility model relates to the field of ball mold wear resistance testing technology, specifically a constant pressure bonding ball mold wear resistance testing device. Background Technology

[0002] A ball mold abrasion resistance testing device is a specialized instrument used to evaluate the abrasion resistance of materials or products. This device is mainly used to test the ability of materials to withstand scratches, abrasions, and other effects in simulated real-world environments. This type of test is crucial for evaluating the durability of materials and is widely used in industries such as machinery manufacturing, automotive, aerospace, electronics, plastics, and rubber products. Such devices typically include a test platform, a spherical load body (ball mold) that can move under specific conditions, and a system that can provide a stable load. During the test, the ball mold continuously rolls or slides on the surface of the test object at a certain speed and with a certain preset load, while simulating different environmental factors (such as temperature and humidity) to simulate various wear conditions in real-world environments.

[0003] As the ball head material gradually wears down, the pressure between the ball head and the ball mold mainly depends on the gravity of the weight. As the thickness of the ball head decreases, the pressure applied to the ball head also decreases, causing the gap between the ball head and the ball mold to gradually increase. Since the ball mold cannot adaptively adjust its position according to the gap, the grinding effect between the ball head and the ball mold cannot be guaranteed. This directly affects the accurate testing of wear rate and wear pattern, resulting in the distortion of test data.

[0004] In view of this, the present invention solves the above-mentioned technical problems by proposing a constant pressure bonding ball mold wear resistance testing device. Utility Model Content

[0005] To address the shortcomings of the aforementioned background technology, this utility model provides a technical solution for a constant-pressure, contact-fitting ball mold wear resistance testing device. Firstly, through the synergistic effect of the tension spring and the counterweight, the pressure of the ball mold on the test piece at the ball head remains constant. Specifically, as the test piece at the ball head wears, the elastic force of the tension spring increases linearly with the sliding distance of the floating seat, precisely offsetting the pressure attenuation caused by the thinning of the ball head. This ensures that the combined force of the counterweight's gravity and the spring's elastic force remains stable at a preset value. This mechanism fundamentally avoids the distortion of wear rate and wear pattern test data caused by pressure fluctuations, significantly improving the reliability of the test results. Secondly, through the structural design of a vertical guide column and a floating seat, the ball mold can automatically slide down as the thickness of the test piece at the ball head decreases. The elastic force of the tension spring always keeps the ball mold "tight" on the surface of the ball head, preventing the ball mold from detaching from the ball head. This dynamic compensation function can cover the entire wear cycle of the ball head, ensuring that the test does not require mid-test stop adjustments, improving testing efficiency and data integrity.

[0006] This utility model provides the following technical solution: a constant pressure bonding ball mold wear resistance testing device, including a worktable and a ball head to be tested;

[0007] A dust collection box is fixedly connected to the top of the workbench;

[0008] Multiple vertical guide columns are fixedly connected to the bottom of the inner cavity of the dust collection box. A floating seat is slidably connected to the surface of each vertical guide column. A tension spring is provided between the floating seat and the vertical guide column. One end of the tension spring is fixedly connected to one end of the vertical guide column and the other end is fixedly connected to the floating seat. A ball mold is fixedly connected to the bottom surface of the floating seat. A counterweight is provided on the top of the ball mold. The gravity of the counterweight and the elastic force of the tension spring work together to make the ball mold adhere to the ball head of the test piece under constant pressure.

[0009] The top of the worktable is equipped with a drive structure for driving the ball-head test piece to rotate around its own axis.

[0010] As a preferred technical solution of this utility model, the driving structure includes a servo motor mounted on the top of the workbench via a support column, and a connector is coaxially fixed to the output shaft of the servo motor. A ball-head test piece is threadedly connected to the outer circumferential surface of the connector.

[0011] As a preferred technical solution of this utility model, a support frame is fixedly connected between the support column and the worktable, and a bearing tile is embedded in the inner cavity of the support frame. The inner surface of the bearing tile is in sliding contact with the outer peripheral surface of the output shaft of the servo motor.

[0012] As a preferred embodiment of this utility model, the top of the workbench is hinged to a dust cover via a damping rotation shaft. The edge of the dust cover is embedded with a sealing strip, and an anti-slip handle is fixedly connected to its outer surface.

[0013] As a preferred technical solution of this utility model, a rubber corrugated tube dust cover is provided between the floating seat and the fixed end of the vertical guide column, and the two ends of the rubber corrugated tube dust cover are respectively clamped to the fixed end of the floating seat and the vertical guide column by stainless steel clamps.

[0014] As a preferred technical solution of this utility model, an infrared temperature control detector is embedded in the inner wall of the ball mold, and the detection surface of the infrared temperature control detector faces the surface of the ball head to be tested.

[0015] As a preferred technical solution of this utility model, the surface of the ball head to be tested is adapted to the inner cavity curved surface of the ball mold.

[0016] In a preferred embodiment of this utility model, the ball mold is fixedly connected to the floating seat by bolts;

[0017] As a preferred embodiment of this utility model, a pressure sensor is provided on the inner wall of the ball mold, and a control panel is fixedly connected to the top of the workbench, with the pressure sensor electrically connected to the control panel.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. This device uses the synergistic effect of the tension spring and the counterweight to keep the pressure of the ball mold on the ball head test piece constant. Specifically, when the ball head test piece wears, the elastic force of the tension spring increases linearly with the sliding distance of the floating seat, which just offsets the pressure attenuation caused by the thinning of the ball head. This ensures that the resultant force of the counterweight and the spring force is always stable at the preset value. This mechanism fundamentally avoids the problem of distortion of wear rate and wear pattern test data caused by pressure fluctuations, and significantly improves the reliability of the test results.

[0020] 2. This device uses a "vertical guide column + floating seat" structural design, which allows the ball mold to automatically slide down as the thickness of the ball head decreases. The elastic force of the tension spring always "pulls" the ball mold to the surface of the ball head, preventing the ball mold from separating from the ball head. This dynamic compensation function can cover the entire wear cycle of the ball head, ensuring that the test does not require mid-test stop for adjustment, thus improving test efficiency and data integrity. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a cross-sectional view of the present invention;

[0023] Figure 3 This is a schematic diagram of the spring structure of this utility model;

[0024] Figure 4 This is a partially enlarged view of the present invention;

[0025] Figure 5 This is a disassembled diagram of the dust collection box in Embodiment 2 of this utility model;

[0026] Figure 6 This is a schematic diagram of the rubber scraper structure in Embodiment 2 of this utility model.

[0027] In the diagram: 1. Workbench; 101. Ball head to be tested; 2. Dust collection box; 3. Vertical guide column; 301. Floating seat; 302. Tension spring; 303. Ball mold; 304. Counterweight; 4. Support column; 401. Servo motor; 402. Connector; 5. Support frame; 501. Bearing tile; 6. Dust cover; 601. Anti-slip handle; 7. Rubber corrugated pipe dust cover; 8. Bolt; 9. Control panel; 10. Pull rod; 1001. Ash discharge chute; 1002. Scraper; 1003. Rubber scraper; 1004. Pin. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Example 1

[0030] Please see Figure 1-4 As shown, a constant pressure bonding ball mold wear resistance testing device includes a worktable 1 and a ball head test piece 101;

[0031] A dust collection box 2 is fixedly connected to the top of the workbench 1;

[0032] Multiple vertical guide posts 3 are fixedly connected to the bottom of the inner cavity of the dust collection box 2. A floating seat 301 is slidably connected to the surface of each vertical guide post 3. A tension spring 302 is provided between the floating seat 301 and the vertical guide post 3. One end of the tension spring 302 is fixedly connected to one end of the vertical guide post 3, and the other end is fixedly connected to the floating seat 301. A ball mold 303 is fixedly connected to the bottom surface of the floating seat 301. A counterweight 304 is provided on the top of the ball mold 303. The gravity of the counterweight 304 and the elastic force of the tension spring 302 work together to make the ball mold 303 press against the ball head test piece 101 with constant pressure.

[0033] The top of the worktable 1 is equipped with a drive structure for driving the ball-head test piece 101 to rotate around its own axis.

[0034] The drive structure includes a servo motor 401 mounted on the top of the workbench 1 via a support column 4. The output shaft of the servo motor 401 is coaxially fixed with a connector 402, and the outer peripheral surface of the connector 402 is threaded with a ball-head test piece 101.

[0035] The ball-shaped test piece 101 is coaxially positioned with the servo motor 401 through the thread of the connector 402;

[0036] A support frame 5 is fixedly connected between the support column 4 and the worktable 1. The inner cavity of the support frame 5 is fitted with a bearing tile 501, and the inner surface of the bearing tile 501 slides in contact with the outer peripheral surface of the output shaft of the servo motor 401.

[0037] The support frame 5 and bearing plate 501 are used to assist in supporting the output shaft and reduce friction;

[0038] The top of the workbench 1 is hinged to a dust cover 6 via a damping rotation shaft. The edge of the dust cover 6 is fitted with a sealing strip, and the outer surface is fixedly connected with an anti-slip handle 601.

[0039] The dust cover 6 is attached to the surface of the workbench 1 through a sealing strip to form a closed testing space;

[0040] A rubber corrugated dust cover 7 is fitted between the floating seat 301 and the fixed end of the vertical guide column 3. The two ends of the rubber corrugated dust cover 7 are respectively clamped to the fixed end of the floating seat 301 and the vertical guide column 3 by stainless steel clamps.

[0041] The rubber corrugated dust cover 7 is used to prevent dust from entering the sliding fit gap between the vertical guide column 3 and the floating seat 301.

[0042] An infrared temperature detector is embedded in the inner wall of the ball mold 303, and the detection surface of the infrared temperature detector faces the surface of the ball head test piece 101.

[0043] Infrared temperature detectors are used to monitor the temperature of the test area in real time;

[0044] The surface of the ball head test piece 101 is adapted to the inner cavity curved surface of the ball mold 303;

[0045] The ball mold 303 is fixedly connected to the floating seat 301 by bolts 8;

[0046] The floating seat is connected to the 301 ball mold 303 by bolt 8, which facilitates the replacement of the ball mold 303;

[0047] A pressure sensor is installed on the inner wall of the ball mold 303, and a control panel 9 is fixedly connected to the top of the worktable 1. The pressure sensor is electrically connected to the control panel 9.

[0048] The pressure sensor is tightly bonded to the inner wall of the ball mold 303 through an epoxy resin adhesive layer to ensure the shortest force transmission path. The pressure-bearing surface of the pressure sensor adopts an arc design, which is consistent with the curvature of the inner cavity surface of the ball mold 303 to avoid measurement errors caused by stress concentration.

[0049] The control panel 9 can simultaneously display pressure and temperature values ​​(from the infrared temperature detector) and test time. It supports exporting CSV format data via USB interface. The accompanying host computer software can draw pressure-time curves and automatically calculate the standard deviation of pressure fluctuations, providing a quantitative basis for wear resistance performance evaluation.

[0050] By setting a pressure sensor inside the ball mold 303 to directly contact the surface of the ball head test piece 101, the dynamic pressure change between the two can be sensed in real time. The silicon diaphragm inside the sensor generates micro-strain under pressure, and the pressure signal is converted into an electrical signal through the piezoresistive effect. This signal is transmitted to the control panel 9 on the top of the workbench 1 through a shielded cable.

[0051] The control panel 9 has a built-in signal conditioning circuit and microprocessor to amplify, filter and linearize the pressure sensor signal. The processed data is converted into a digital quantity by an A / D converter and the pressure value is displayed in real time on the LCD screen of the control panel 9. Users can use the calibration button on the control panel 9 to input the standard pressure value before testing to perform zero-point and full-scale calibration to ensure measurement accuracy.

[0052] The pressure sensor is a GZP6859D digital pressure sensor. The GZP6859D digital pressure sensor is small in size and can be directly embedded into the mounting groove reserved in the inner wall of the ball mold 303 without affecting the fitting accuracy between the ball mold and the ball head. It is connected to the control panel 9 via I2C bus, has strong anti-interference ability, and is suitable for long-distance signal transmission.

[0053] This device achieves constant pressure bonding between the ball mold and the test piece at the ball head through the synergistic effect of the tension spring and the counterweight. The specific working principle is as follows:

[0054] Initial state (when the ball head test piece 101 is not worn)

[0055] The ball head test piece 101 is mounted on the connector 402 of the drive structure, and its surface is precisely matched with the inner cavity curved surface of the ball mold 303. At this time, under the gravity of the counterweight 304, the floating seat 301 drives the ball mold 303 to hang down naturally and fit tightly against the surface of the ball head test piece 101.

[0056] The tension spring 302 is in a naturally relaxed state (no elasticity or very little elasticity), and the initial pressure of the ball mold 303 on the ball head test piece 101 is provided only by the gravity of the counterweight 304, ensuring that the contact pressure meets the preset test value.

[0057] Test procedure (dynamic compensation when ball head test piece 101 is worn)

[0058] After the drive structure is started, the servo motor 401 drives the ball head test piece 101 to rotate around its own axis. The ball mold 303 rubs against the rotating ball head surface, and the ball head test piece 101 gradually becomes thinner due to wear.

[0059] As the thickness of the ball head decreases, the ball mold 303 loses its original support. Under the gravity of the counterweight 304, it drives the floating seat 301 to slide vertically downward along the vertical guide column 3 (the vertical guide column 3 restricts the displacement of the floating seat 301, ensuring that the ball mold 303 is always facing the ball head test piece 101).

[0060] As the floating seat 301 slides down, the tension spring 302 connecting the floating seat 301 and the vertical guide column 3 is gradually stretched, generating an upward elastic force (the magnitude of the elastic force is proportional to the amount of stretching, which conforms to Hooke's Law).

[0061] At this time, the contact pressure of the ball mold 303 on the ball head test piece 101 is "the gravity of the counterweight 304 - the elastic force of the tension spring 302". By preset the stiffness coefficient of the tension spring 302, the elastic force of the tension spring 302 is linearly matched with the increase of the wear of the ball head test piece 101 (i.e. the sliding distance of the floating seat 301) to meet the attenuation requirement of the gravity of the counterweight 304, so that the contact pressure of the ball mold on the ball head remains constant.

[0062] Accessibility synergy

[0063] Dust generated by wear falls into dust collection box 2 to prevent contamination of the guide structure;

[0064] The rubber corrugated dust cover 7 prevents dust from entering the sliding gap between the floating seat 301 and the vertical guide column 3, ensuring smooth sliding.

[0065] Infrared temperature detectors monitor the temperature of the friction area in real time to ensure a stable testing environment.

[0066] Example 2

[0067] Please continue reading. Figure 5-6 As shown, based on Embodiment 1, to further improve the ease of cleaning dust collection box 2, this embodiment optimizes dust collection box 2 as follows:

[0068] A dust discharge groove 1001 is provided on one side wall of the dust collection box 2. A scraper 1002 is slidably arranged inside the dust collection box 2. A rubber scraper 1003 is slidably connected to the inner cavity of the scraper 1002. The bottom surface of the rubber scraper 1003 is tightly fitted to the bottom of the inner cavity of the dust collection box 2. The rubber scraper 1003 can be pulled and replaced along the length of the scraper 1002 by pulling the rubber scraper 1003.

[0069] One end of the scraper 1002 is connected to the pull rod 10 via the pin 1004. The other end of the pull rod 10 passes through the side wall of the dust collection box 2 away from the ash discharge trough 1001 and extends to the outside. One end of the pull rod 10 passes through the inner cavity of the scraper 1002 and the pull rod 10, so that the two can be detached and fixed.

[0070] In this embodiment, the specific process of dust removal is as follows:

[0071] When a certain amount of wear dust accumulates in the dust collection box 2, the hand lever 10 is located at one end outside the dust collection box 2 and is pulled back and forth along the length of the dust collection box 2.

[0072] The pull rod 10 drives the scraper 1002 to slide inside the dust collection box 2. The rubber scraper 1003 moves synchronously with the scraper 1002, scraping the dust at the bottom of the dust collection box 2 towards the ash discharge trough 1001. Finally, the dust is discharged through the ash discharge trough 1001.

[0073] When the rubber scraper 1003 ages and wears down due to long-term use, resulting in a decrease in scraping effect, the old rubber scraper 1003 can be pulled out directly along the inner cavity of the scraper 1002, and then the new rubber scraper 1003 can be inserted along the inner cavity of the scraper 1002 to complete the individual replacement.

[0074] If maintenance is required on scraper 1002 or pull rod 10, the pin 1004 can be pulled out of the inner cavity of pull rod 10 and scraper 1002 to separate scraper 1002 from pull rod 10, which is convenient to operate.

[0075] The beneficial effects of this embodiment are as follows: the cooperation of the pull rod 10, scraper 1002 and rubber scraper 1003 enables the rapid scraping and discharge of dust in the dust collection box 2, solving the problem of dust flying during traditional manual dumping and cleaning; the sliding connection design of the rubber scraper 1003 and scraper 1002 allows for the individual replacement of easily damaged rubber parts, reducing maintenance costs; and the pin 1004 connection structure between the scraper 1002 and the pull rod 10 facilitates the disassembly and maintenance of both, further improving the practicality of the device.

[0076] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Additionally, in the accompanying drawings of this utility model, the fill patterns are merely for distinguishing layers and do not constitute any other limitation.

[0077] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A constant-pressure bonding ball mold abrasion resistance testing device, comprising: Workbench (1) and ball head test piece (101); The feature is that a dust collection box (2) is fixedly connected to the top of the workbench (1); Multiple vertical guide columns (3) are fixedly connected to the bottom of the inner cavity of the dust collection box (2). A floating seat (301) is slidably connected to the surface of each vertical guide column (3). A tension spring (302) is provided between the floating seat (301) and the vertical guide column (3). One end of the tension spring (302) is fixedly connected to one end of the vertical guide column (3), and the other end is fixedly connected to the floating seat (301). A ball mold (303) is fixedly connected to the bottom surface of the floating seat (301). A counterweight (304) is provided on the top of the ball mold (303). The gravity of the counterweight (304) and the elastic force of the tension spring (302) work together to make the ball mold (303) press against the ball head test piece (101) with constant pressure. The top of the worktable (1) is provided with a driving structure for driving the ball-head test piece (101) to rotate around its own axis.

2. The constant pressure bonding ball mold wear resistance testing device according to claim 1, characterized in that: The drive structure includes a servo motor (401) mounted on the top of the workbench (1) via a support column (4). The output shaft of the servo motor (401) is coaxially fixed with a connector (402), and the outer circumferential surface of the connector (402) is threaded with a ball-head test piece (101).

3. The constant pressure bonding ball mold wear resistance testing device according to claim 2, characterized in that: A support frame (5) is fixedly connected between the support column (4) and the worktable (1). The inner cavity of the support frame (5) is fitted with a bearing tile (501). The inner surface of the bearing tile (501) slides in contact with the outer circumferential surface of the output shaft of the servo motor (401).

4. The constant pressure bonding ball mold wear resistance testing device according to claim 1, characterized in that: The top of the workbench (1) is hinged to a dust cover (6) via a damping rotation shaft. The edge of the dust cover (6) is fitted with a sealing strip, and an anti-slip handle (601) is fixedly connected to its outer surface.

5. The constant pressure bonding ball mold wear resistance testing device according to claim 1, characterized in that: A rubber corrugated dust cover (7) is fitted between the floating seat (301) and the fixed end of the vertical guide column (3). The two ends of the rubber corrugated dust cover (7) are respectively clamped to the fixed end of the floating seat (301) and the vertical guide column (3) by stainless steel clamps.

6. The constant pressure bonding ball mold wear resistance testing device according to claim 1, characterized in that: An infrared temperature detector is embedded in the inner wall of the ball mold (303), and the detection surface of the infrared temperature detector faces the surface of the ball head test piece (101).

7. The constant pressure bonding ball mold wear resistance testing device according to claim 1, characterized in that: The surface of the ball head test piece (101) is adapted to the inner cavity curved surface of the ball mold (303).

8. The constant pressure bonding ball mold wear resistance testing device according to claim 1, characterized in that: The ball mold (303) is fixedly connected to the floating seat (301) by bolts (8).

9. The constant pressure bonding ball mold wear resistance testing device according to claim 1, characterized in that: A pressure sensor is provided on the inner wall of the ball mold (303), and a control panel (9) is fixedly connected to the top of the workbench (1). The pressure sensor is electrically connected to the control panel (9).

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