A device and method for testing the surface hardness of ceramic grinding wheels

Abstract

This invention discloses a ceramic grinding wheel surface hardness testing device and method, including a hardness tester body, with testing sections respectively provided in the grooves of the hardness tester body, including a pressing contact and a microscopic observation instrument to realize the pressing and hardness measurement of the ceramic grinding wheel. This invention relates to the field of hardness testing technology. The ceramic grinding wheel surface hardness testing device and method use a rotating sleeve driven by a forward and reverse lead screw of a moving component to move synchronously in opposite directions with an L-shaped plate. A clamping component is set at the top of the L-shaped plate, cooperating with an auxiliary moving component and an auxiliary pressing component. An arc-shaped clamping plate clamps the outer edge of the ceramic grinding wheel, and a sector gear is synchronously driven to drive a square frame to swing, so that the auxiliary pressing roller adaptively presses the upper side of the grinding wheel, forming an internal and external synchronous clamping structure. This structure is adaptable to workpieces of different thicknesses for auxiliary pressing, effectively solving the problems of easy slippage, misalignment, and warping during clamping, and significantly improving the stability and positioning accuracy of the testing process.

Description

Technical Field

[0001] This invention relates to the field of hardness testing technology, specifically to a device and method for testing the surface hardness of ceramic grinding wheels. Background Technology

[0002] Ceramic grinding wheels are commonly used grinding tools in the field of machining. Their surface hardness directly determines the grinding accuracy, wear resistance and service life, and is one of the core indicators for evaluating the quality of ceramic grinding wheels.

[0003] The reference patent title is: A Ceramic Grinding Wheel Surface Hardness Testing Device (Patent Publication No.: CN212964342U, Patent Publication Date: 2021-04-13). It includes a workbench, a support column, a testing plate, and a controller fixedly installed on the top of the workbench. A lead screw is rotatably connected inside the support column, and a motor is fixedly connected to the top of the support column. The output end of the motor passes through the top of the support column and is fixedly connected to the lead screw. A fixing plate is slidably connected to the side wall of the support column. This invention prevents injury to workers from broken ceramic grinding wheels by covering the testing plate with a safety cover. The safety cover is rotatably connected to the workbench surface, facilitating the fixing of the grinding wheel and the cleaning of grinding wheel fragments. Universal wheels are installed at the bottom of the workbench's crossbeam, and the length of the extended screw is adjusted by rotating the rotating nut, ensuring the bottom plate is tightly fitted to the ground.

[0004] Based on the description in the above documents, existing ceramic grinding wheel surface hardness testing devices, when operated using a single-sided or simple clamping method, are prone to slippage and misalignment during the testing process, leading to problems such as hardness testing point displacement and indentation distortion. Furthermore, switching testing points depends on manually moving or rotating the workpiece, and after rotation, the testing position of the workpiece is within the same diameter, making it difficult to comprehensively test multiple areas and random points on the grinding wheel surface. Therefore, this invention provides a ceramic grinding wheel surface hardness testing device and its testing method. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a ceramic grinding wheel surface hardness testing device and method, which solves the problems of slippage and misalignment causing inaccurate testing points in existing ceramic grinding wheel surface hardness testing methods, as well as the inconvenience of switching testing points and the difficulty in comprehensively testing multiple areas and random points on the grinding wheel surface.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a ceramic grinding wheel surface hardness testing device, comprising a hardness tester body, wherein the grooves of the hardness tester body are respectively provided with: The testing unit includes an extrusion contact and a microscopic observation instrument to measure the pressure and hardness of the ceramic grinding wheel. The extrusion contact and the microscopic observation instrument are switched in position via a switching device. The support unit includes a support platform, the bottom of which is adjusted in height via a lifting mechanism. Inside the support platform, symmetrical L-shaped plates move relative to each other or away from each other via a moving mechanism. The top of the L-shaped plates is equipped with a clamping mechanism for the ceramic grinding wheel to be tested. A vertical plate is installed below the L-shaped plates, and a connecting plate is installed at the bottom of the vertical plate. A pushing mechanism is installed on the side of the connecting plate to achieve lateral displacement. A transmission rack is installed on the extended end face of the connecting plate. A support shaft is fixed at the center of the bottom of the support platform cavity, and a transmission gear is installed at the top of the support shaft. When the transmission rack moves to mesh with the transmission gear and drives the transmission gear to rotate, the entire support platform and internal structural components rotate synchronously.

[0007] Preferably, the switching element includes: The fixed plate, extrusion contact and microscopic observation instrument are all installed below the fixed plate. A secondary drive shaft is fixed at the center of the top of the fixed plate, and the secondary drive shaft is rotatably connected to the outer shell of the hardness tester body. The top of the secondary drive shaft extends through into the interior of the hardness tester body and is fixed with a complete gear. The drive motor is installed on the inner wall of the hardness tester body, and a half-ring gear is installed at one end of the drive motor output shaft through a coupling. When the half-ring gear rotates, its teeth mesh with the full gear, driving the full gear to rotate.

[0008] Preferably, the lifting component includes a threaded column slidably mounted inside the hardness tester body, with the top end of the threaded column rotatably connected to the bottom end of the support shaft, and a threaded sleeve wrench threadedly connected to the outer thread of the threaded column. The threaded sleeve wrench is rotatably connected to the groove of the hardness tester body, that is, when the threaded sleeve wrench rotates, the threaded column performs a lifting operation.

[0009] Preferably, the moving part includes: The forward and reverse lead screws are rotatably installed inside the bearing platform, with one end of the forward and reverse lead screws extending to the outside of the bearing platform and fixedly connected to a rotating handle. The forward and reverse lead screws pass through the vertical plate and slide relative to the vertical plate. The rotating sleeve is threadedly connected to the threads of the forward and reverse lead screws. An extension plate is installed below the rotating sleeve, and a hollow frame is installed on the side of the extension plate. The connecting plate passes through the hollow part of the hollow frame and slides in contact with the inner wall of the hollow frame.

[0010] Preferably, the pushing component includes a cylinder fixedly installed on one side of the extension plate, and a piston rod is slidably installed inside the cylinder. One end of the piston rod passes through the extension plate and the hollow frame in sequence and extends to the hollow part of the hollow frame. The end face of the piston rod is connected and fixed to the side opposite to the connecting plate. When the pushing component is driven, the clamping component holding the ceramic grinding wheel to be tested moves as a whole to complete the hardness test of different areas.

[0011] Preferably, the clamping member includes: A concave seat is fixedly installed on the top of an L-shaped plate. A rotating shaft is rotatably installed on the inner side of the concave seat, and a sector gear is fixedly installed on the surface of the rotating shaft. An auxiliary component is provided below the sector gear to make the sector gear rotate. A square frame is fixedly installed on the arc surface of the sector gear, and an auxiliary clamping component is provided inside the square frame to assist in clamping the upper side of the ceramic grinding wheel.

[0012] Preferably, the auxiliary component includes a movable rack that meshes with the tooth surface of a sector gear. When the movable rack moves, it causes the sector gear to rotate around the rotation axis. A movable groove is provided at the bottom of the concave seat, and the movable rack slides inside the movable groove. A movable rod is fixedly installed on one side of the movable rack, extending through to the outside of the concave seat. An arc-shaped clamp is installed at the end of the movable rod. A stop spring is installed between the opposite side of the movable rack and the opposite side of the movable groove. The restoring force of the stop spring when it is not affected by other external forces causes the arc-shaped clamp to move towards the center of the support platform.

[0013] Preferably, the auxiliary pressing component includes a rotating shaft rotatably mounted on the inner side of the square frame, a vertical frame fixedly mounted on the surface of the rotating shaft, a central shaft rotatably mounted on the bottom side of the vertical frame, and an auxiliary pressing roller rotatably mounted on the surface of the central shaft. The vertical frame and the auxiliary pressing roller remain vertically downward when the square frame is tilted.

[0014] Preferably, the top of the support platform is provided with a symmetrical sliding groove, and the L-shaped plate passes through the sliding groove and slides relative to it. An arc-shaped baffle is installed on the L-shaped plate at the lower edge of the sliding groove. The arc-shaped baffle, together with the limiting of the concave seat, allows the concave seat to move horizontally on the support platform.

[0015] This invention also discloses a method for testing the surface hardness of ceramic grinding wheels, specifically including the following steps: S1. Place the ceramic grinding wheel to be tested on the bearing part, and use the moving part to make the clamping part at the top of the L-shaped plate clamp the ceramic grinding wheel to be tested; S2. The extrusion test between the ceramic grinding wheel and the extrusion contact is achieved by using the lifting component, and the microscopic observation instrument is switched to the extruded area by using the switching component to calculate the hardness of the current extrusion position. S3. After the initial inspection is completed, the pusher is used to achieve the overall lateral displacement of the ceramic grinding wheel to be inspected, and at the same time, the transmission rack is driven to move to achieve synchronous rotation of the transmission gear and the entire support platform, thus completing the random switching of the inspection position of the ceramic grinding wheel to be inspected. S4. After repeating steps S2 and S3 multiple times, the average value of the multiple measurement data is taken to obtain the hardness value of the ceramic grinding wheel to be tested.

[0016] This invention provides a device and method for testing the surface hardness of ceramic grinding wheels. Compared with the prior art, it has the following advantages: 1. The ceramic grinding wheel surface hardness testing device and its testing method use a rotating sleeve driven by a forward and reverse lead screw of a moving part to move synchronously in opposite directions with an L-shaped plate. A clamping part is set at the top of the L-shaped plate to cooperate with an auxiliary moving part and an auxiliary pressing part. An arc-shaped clamping plate clamps the outer edge of the ceramic grinding wheel. The sector gear is driven synchronously to drive the square frame to swing, so that the auxiliary pressing roller adaptively presses the upper side of the grinding wheel, forming an internal and external synchronous clamping structure. It can be adapted to workpieces of different thicknesses to assist in clamping, effectively solving the problems of easy slippage, misalignment and warping during clamping, and significantly improving the stability and positioning accuracy of the testing process.

[0017] 2. The ceramic grinding wheel surface hardness testing device and its testing method drive the connecting plate and the transmission rack to move laterally by pushing the component, so that the transmission rack and the transmission gear mesh and drive the bearing table to rotate automatically. With the help of lateral displacement, the test points can be randomly switched in both radial and circumferential dimensions, which solves the problem of not being able to detect multiple areas comprehensively, and makes the hardness test data more representative and accurate.

[0018] 3. The ceramic grinding wheel surface hardness testing device and its testing method, by setting a switching component in the testing section, uses a drive motor to drive a half-turn gear to mesh with a full gear, driving the fixed plate to rotate, realizing automatic and rapid switching between the extrusion contact and the microscopic observation instrument, eliminating the manual adjustment steps, solving the problems of cumbersome and inefficient switching between testing and observation, improving the continuity and standardization of testing, and using the threaded sleeve wrench of the lifting component to drive the threaded column to precisely lift vertically, realizing stable adjustment of the bearing platform height, and accurately controlling the contact pressure between the extrusion contact and the ceramic grinding wheel surface, solving the problems of inconvenient height adjustment and inaccurate pressure control. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall external structure of the present invention; Figure 2 This is a three-dimensional structural diagram of the detection unit of the present invention; Figure 3 This is a three-dimensional structural diagram of the support portion of the present invention; Figure 4 This is a three-dimensional structural cross-sectional view of the support platform of the present invention; Figure 5 This is a three-dimensional structural diagram of the support platform of the present invention; Figure 6 This is a three-dimensional structural diagram of the moving part of the present invention; Figure 7 This is a three-dimensional structural exploded view of the pushing component of the present invention; Figure 8 This is a three-dimensional structural cross-sectional view of the clamping component of the present invention; Figure 9 For the present invention Figure 8 Enlarged view of the local structure at point A; Figure 10 This is a three-dimensional structural diagram of the auxiliary component of the present invention; Figure 11 This is a three-dimensional structural diagram of the auxiliary pressure component of the present invention.

[0020] In the diagram: 1-Hardness tester body, 2-Detection section, 21-Extrusion contact, 22-Microscopic observation instrument, 23-Switching component, 231-Fixing plate, 232-Secondary driving shaft, 233-Complete gear, 234-Drive motor, 235-Half-circle gear, 3-Bearing section, 31-Bearing platform, 32-Lifting component, 321-Threaded column, 322-Threaded sleeve wrench, 33-Moving component, 331-Forward and reverse lead screw, 332-Rotating handle, 333-Rotating sleeve, 334-Extension plate, 335-Hollow frame, 34-L-shaped plate, 35-Vertical plate, 3 6-Connecting plate, 37-Pushing component, 371-Cylinder, 372-Piston rod, 38-Transmission rack, 39-Support shaft, 310-Transmission gear, 4-Clamping component, 41-Concave seat, 42-Rotating shaft, 43-Sector gear, 44-Auxiliary component, 441-Moving rack, 442-Moving groove, 443-Moving rod, 444-Arc-shaped clamping plate, 445-Abutting spring, 45-Square frame, 46-Auxiliary pressure component, 461-Rotating shaft, 462-Vertical frame, 463-Central shaft, 464-Auxiliary pressure roller, 5-Sliding groove, 6-Arc-shaped baffle. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figures 1-11 This invention provides two technical solutions: Example 1: A ceramic grinding wheel surface hardness testing device, comprising a hardness tester body 1, wherein the grooves of the hardness tester body 1 are respectively provided with: The testing unit 2 includes a pressing contact 21 and a microscopic observation instrument 22 to realize the pressing and hardness measurement of the ceramic grinding wheel. The pressing contact 21 and the microscopic observation instrument 22 are switched in position by a switching component 23. The support unit 3 includes a support platform 31, and the bottom of the support platform 31 can change its height position through a lifting member 32. Inside the support platform 31, the symmetrical L-shaped plates 34 can move relative to each other or away from each other through a moving member 33. The top of the L-shaped plate 34 is provided with a clamping member 4 for the ceramic grinding wheel to be tested. A vertical plate 35 is installed below the L-shaped plate 34, and a connecting plate 36 is installed at the bottom of the vertical plate 35. A pushing member 37 is provided on the side of the connecting plate 36 to achieve lateral displacement. A transmission rack 38 is installed at the extended end face of the connecting plate 36. A support shaft 39 is fixed at the center of the bottom of the inner cavity of the support platform 31, and a transmission gear 310 is installed at the top of the support shaft 39. When the transmission rack 38 moves to mesh with the transmission gear 310 and drives the transmission gear 310 to rotate, the entire support platform 31 and its internal structural components rotate synchronously.

[0023] The extrusion contact 21 is a Rockwell hardness indenter, used to apply standard pressure to the surface of the grinding wheel to form an indentation; the microscopic observation instrument 22 is used to magnify and measure the size of the indentation. The two are automatically switched by 180° rotation through the switching component 23, without the need for manual disassembly and adjustment.

[0024] Please see Figure 2 In this embodiment of the invention, the switching element 23 includes: The fixed plate 231, the extrusion contact 21 and the microscopic observation instrument 22 are all installed below the fixed plate 231. The auxiliary shaft 232 is fixed at the center of the top of the fixed plate 231, and the auxiliary shaft 232 is rotatably connected to the outer shell of the hardness tester body 1. The top end of the auxiliary shaft 232 extends through into the interior of the hardness tester body 1 and is fixed with a complete gear 233. The drive motor 234 is installed on the inner wall of the hardness tester body 1, and a half-circle gear 235 is installed at one end of the output shaft of the drive motor 234 through a coupling. When the half-circle gear 235 rotates, its teeth mesh with the complete gear 233, driving the complete gear 233 to rotate.

[0025] The drive motor 234 is a three-phase asynchronous motor. The drive motor 234 is electrically connected to an external power supply and has a self-locking function, that is, when the machine stops, the output shaft remains stationary.

[0026] By setting a switching component 23 in the detection unit 2, the drive motor 234 drives the half-circle gear 235 to mesh with the full gear 233, driving the fixed plate 231 to rotate, realizing the automatic and rapid switching between the extrusion contact 21 and the microscopic observation instrument 22, eliminating the manual adjustment steps, solving the problems of cumbersome and inefficient switching between detection and observation, improving the continuity and standardization of detection, and using the threaded sleeve wrench 322 of the lifting component 32 to drive the threaded column 321 to vertically and precisely lift, realizing the stable adjustment of the height of the bearing platform 31, and accurately controlling the contact pressure between the extrusion contact 21 and the surface of the ceramic grinding wheel, solving the problems of inconvenient height adjustment and inaccurate pressure control.

[0027] Please see Figure 3 In this embodiment of the invention, the lifting component 32 includes a threaded post 321 that is slidably installed inside the hardness tester body 1, and the top end of the threaded post 321 is rotatably connected to the bottom end of the support shaft 39. A threaded sleeve wrench 322 is threadedly connected to the outer thread of the threaded post 321. The threaded sleeve wrench 322 is rotatably connected to the groove of the hardness tester body 1, that is, when the threaded sleeve wrench 322 rotates, the threaded post 321 performs a lifting operation.

[0028] The lifting component 32 is used to precisely adjust the vertical height of the bearing platform 31 and control the contact force between the extrusion contact 21 and the grinding wheel. The threaded column 321 and the inner side of the hardness tester body 1 maintain only vertical sliding operation. The threaded column 321 cannot rotate inside the hardness tester body 1. When rotating, the threaded column 321 is driven to rise or fall through the threaded pair. The top of the threaded column 321 is rotatably connected to the support shaft 39. Therefore, the lifting does not affect the subsequent rotation of the bearing platform 31, realizing that the height adjustment and rotation functions do not interfere with each other.

[0029] Please see Figures 4-5 In this embodiment of the invention, the movable component 33 includes: The forward and reverse lead screw 331 is rotatably installed inside the support platform 31, and one end of the forward and reverse lead screw 331 extends to the outside of the support platform 31 and is fixedly connected to the rotating handle 332. The forward and reverse lead screw 331 passes through the vertical plate 35 and slides relative to the vertical plate 35. The rotating sleeve 333 is threadedly connected to the threaded part of the forward and reverse lead screw 331. An extension plate 334 is installed below the rotating sleeve 333, and a hollow frame 335 is installed on the side of the extension plate 334. The connecting plate 36 passes through the hollow part of the hollow frame 335 and slides in contact with the inner side wall of the hollow frame 335.

[0030] Among them, the threads at both ends of the forward and reverse lead screw 331 are turned in opposite directions. When the rotating handle 332 is rotated, the rotating sleeves 333 on both sides move towards the center or away from each other at the same time. The rotating sleeves 333 are connected to the hollow frame 335 through the extension plate 334. The hollow frame 335 is fitted outside the connecting plate 36 and can slide relative to it, ensuring that the adjustment of the clamping width does not affect the subsequent lateral pushing and rotating actions.

[0031] The rotating sleeve 333 and the L-shaped plate 34 are driven to move synchronously in opposite directions by the forward and reverse lead screws 331 of the moving part 33. The clamping part 4 is set at the top of the L-shaped plate 34, which works in conjunction with the auxiliary moving part 44 and the auxiliary pressing part 46. The outer edge of the ceramic grinding wheel is clamped by the arc-shaped clamping plate 444. The sector gear 43 is driven to drive the square frame 45 to swing, so that the auxiliary pressing roller 464 adaptively presses the upper side of the grinding wheel, forming an internal and external synchronous clamping structure. It can be adapted to workpieces of different thicknesses for auxiliary pressing, effectively solving the problems of easy slippage, misalignment and warping during clamping, and significantly improving the stability and positioning accuracy of the detection process.

[0032] Please see Figures 6-7 In this embodiment of the invention, the pushing member 37 includes a cylinder 371 fixedly installed on one side of the extension plate 334, and a piston rod 372 is slidably installed inside the cylinder 371. One end of the piston rod 372 passes through the extension plate 334 and the hollow frame 335 in sequence and extends to the hollow part of the hollow frame 335. The end face of the piston rod 372 is connected and fixed to the side opposite to the connecting plate 36. When the pushing member 37 is driven, the clamping member 4 holding the ceramic grinding wheel to be tested moves as a whole to complete the hardness detection of different areas.

[0033] Cylinder 371 is connected to an external air circuit and has a self-locking function. That is, after the extension operation is completed, it can fix the position of piston rod 372 to maintain the stability of product clamping. Cylinder 371 drives piston rod 372 to extend, pushing connecting plate 36, vertical plate 35, L-shaped plate 34 and clamping member 4 to move laterally in sync. The transmission rack 38 at the end of connecting plate 36 moves forward accordingly. When the rack meshes with transmission gear 310, it drives transmission gear 310, support shaft 39 and bearing platform 31 to rotate as a whole, realizing radial movement + circumferential rotation dual-dimensional displacement, so that the detection point jumps out of a single circle and covers random points on the entire disk surface.

[0034] By driving the connecting plate 36 and the transmission rack 38 to move laterally through the pusher 37, the transmission rack 38 and the transmission gear 310 mesh and move together, causing the bearing platform 31 to rotate automatically. Combined with the lateral displacement, the detection points can be randomly switched in both radial and circumferential dimensions, which solves the problem of not being able to detect multiple areas comprehensively, and makes the hardness test data more representative and accurate.

[0035] Please see Figures 8-11 In this embodiment of the invention, the clamping member 4 includes: A concave seat 41 is fixedly installed on the top of an L-shaped plate 34. A rotating shaft 42 is rotatably installed on the inner side of the concave seat 41, and a sector gear 43 is fixedly installed on the surface of the rotating shaft 42. An auxiliary member 44 is provided below the sector gear 43 to make the sector gear 43 rotate. A square frame 45 is fixedly installed on the arc surface of the sector gear 43, and an auxiliary clamping component 46 is provided inside the square frame 45 to achieve auxiliary clamping of the upper side of the ceramic grinding wheel where it is clamped.

[0036] Please see Figures 8-9 In this embodiment of the invention, the auxiliary member 44 includes a movable rack 441, which meshes with the tooth surface of the sector gear 43. When the movable rack 441 moves, the sector gear 43 rotates around the rotation shaft 42. A movable groove 442 is provided at the bottom of the groove of the concave seat 41. The movable rack 441 slides inside the movable groove 442. A movable rod 443 is fixedly installed on one side of the movable rack 441. The movable rod 443 extends through to the outside of the concave seat 41. An arc-shaped clamp 444 is installed at the end of the movable rod 443. A stop spring 445 is installed between the opposite side of the movable rack 441 and the opposite side of the movable groove 442. The restoring force of the stop spring 445 when it is not affected by other external forces causes the arc-shaped clamp 444 to move towards the center of the support platform 31.

[0037] Please see Figures 10-11 In this embodiment of the invention, the auxiliary pressing component 46 includes a rotating shaft 461 rotatably mounted on the inner side of the square frame 45, a vertical frame 462 fixedly mounted on the surface of the rotating shaft 461, a central shaft 463 rotatably mounted on the bottom side of the vertical frame 462, and an auxiliary pressing roller 464 rotatably mounted on the surface of the central shaft 463. The vertical frame 462 and the auxiliary pressing roller 464 remain vertically downward when the square frame 45 is tilted.

[0038] When the square frame 45 swings down, the vertical frame 462 is rotatably connected to the square frame 45 through the rotating shaft 461, and always remains vertically downward under the action of gravity; the auxiliary pressure roller 464 is rotatably connected to the vertical frame 462 through the central shaft 463 to form a floating pressure, which can be adapted to grinding wheels of different thicknesses, while avoiding rigid pressure damage, and achieving non-warping auxiliary positioning of the upper surface.

[0039] Please see Figure 4 and Figure 8 In this embodiment of the invention, a symmetrical sliding groove 5 is provided on the top of the support platform 31, and the L-shaped plate 34 passes through the sliding groove 5 and slides relative to it. An arc-shaped baffle 6 is installed on the L-shaped plate 34 at the lower edge of the sliding groove 5. The arc-shaped baffle 6, in conjunction with the limiting of the concave seat 41, allows the concave seat 41 to move horizontally on the support platform 31.

[0040] A sliding groove 5 is provided on the top of the support platform 31, and an L-shaped plate 34 passes through the sliding groove 5. An arc-shaped baffle 6 is installed below. The arc-shaped baffle 6 cooperates with the concave seat 41 to limit the movement, so that the clamping part 4 can only move horizontally and linearly along the sliding groove 5, preventing shaking, tilting, and jamming, and ensuring stable clamping and movement.

[0041] Example 2 differs from Example 1 in that: the present invention also discloses a method for testing the surface hardness of a ceramic grinding wheel, specifically including the following steps: S1. Place the ceramic grinding wheel to be tested on the bearing part 3, and use the moving part 33 to make the clamping part 4 at the top of the L-shaped plate 34 clamp the ceramic grinding wheel to be tested. S2. The lifting component 32 is used to realize the extrusion detection between the ceramic grinding wheel to be tested and the extrusion contact 21, and the switching component 23 is used to switch the microscopic observation instrument 22 to the extruded area to calculate the hardness of the current extrusion position. S3. After the initial inspection is completed, the pusher 37 is used to achieve the overall lateral displacement of the ceramic grinding wheel to be inspected, and at the same time, the transmission rack 38 is driven to move to achieve synchronous rotation of the transmission gear 310 and the entire support platform 31, thereby completing the random switching of the inspection position of the ceramic grinding wheel to be inspected. S4. After repeating steps S2 and S3 multiple times, the average value of the multiple measurement data is taken to obtain the hardness value of the ceramic grinding wheel to be tested.

[0042] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0043] During operation, the ceramic grinding wheel to be tested is first placed at the center of the top of the support platform 31. The rotating handle 332 of the moving part 33 is rotated to drive the forward and reverse screws 331 to rotate, so that the rotating sleeve 333 drives the extension plate 334, the hollow frame 335 and the L-shaped plate 34 to move towards the center along the sliding groove 5. The clamping part 4 at the top of the L-shaped plate 34 simultaneously approaches the ceramic grinding wheel. After the arc-shaped clamping plate 444 contacts the outer edge of the grinding wheel, it pushes the moving rod 443 and the moving rack 441 to slide along the moving groove 442 and compress the abutment spring 445. At this time, the moving rack 441 meshes with the sector gear 43, driving the sector gear 43 to rotate around the rotating shaft 42, so that the square frame 45 swings downward. The vertical frame 462 of the auxiliary pressing part 46 inside the square frame 45 remains vertical under the action of gravity. The auxiliary pressing roller 464 presses the upper side of the ceramic grinding wheel with the vertical frame 462, and cooperates with the arc-shaped clamping plate 444 to complete the stable clamping of the grinding wheel. After clamping is completed, rotate the threaded sleeve wrench 322 of the lifting component 32 to drive the threaded column 321 to move upward, which in turn drives the support shaft 39, the bearing platform 31 and the clamped ceramic grinding wheel to rise as a whole, so that the surface of the grinding wheel contacts the extrusion contact 21 of the detection part 2 and applies detection pressure to complete the hardness indentation detection. Then, start the drive motor 234 of the switching component 23 to drive the half-circle gear 235 to rotate. When the half-circle gear 235 meshes with the full gear 233, it drives the auxiliary shaft 232 and the fixed plate 231 to rotate, and switches the microscopic observation instrument 22 to the indentation position to observe the indentation size and calculate the hardness value. After a single-point test is completed, the cylinder 371 of the pusher 37 is activated, driving the piston rod 372 to push the connecting plate 36 and the vertical plate 35 to move laterally. The connecting plate 36 drives the transmission rack 38 to move synchronously. When the transmission rack 38 meshes with the transmission gear 310 on the support shaft 39, it drives the transmission gear 310 to rotate, thereby driving the support shaft 39, the bearing platform 31 and the clamped ceramic grinding wheel to rotate synchronously, realizing the angle switching of the test point. At the same time, the pusher 37 drives the clamping part 4 and the grinding wheel to move laterally as a whole, and completes the random point test in different areas in conjunction with the angle rotation. Repeat the lateral displacement, angular rotation and hardness testing steps to obtain multiple sets of test data and take the average value to obtain the accurate surface hardness of the ceramic grinding wheel. After the test is completed, reverse the operation of the moving part 33 and the lifting part 32, release the clamping part 4 and lower the bearing platform 31, remove the tested ceramic grinding wheel, and complete the entire testing process.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only 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 process, method, article, or apparatus.

[0045] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for detecting the surface hardness of a ceramic grinding wheel sheet, comprising a hardness detector body (1), characterized in that: Furthermore, the grooves of the hardness tester body (1) are respectively provided with: The detection unit (2) includes a pressing contact (21) and a microscopic observation instrument (22) to realize the pressing and hardness measurement of the ceramic grinding wheel. The pressing contact (21) and the microscopic observation instrument (22) can switch positions through a switching component (23). The support unit (3) includes a support platform (31), and the bottom of the support platform (31) changes its height position through a lifting member (32). Inside the support platform (31), a moving member (33) causes the symmetrical L-shaped plates (34) to move relative to each other or away from each other. The top of the L-shaped plate (34) is provided with a clamping member (4) for the ceramic grinding wheel to be tested. A vertical plate (35) is installed below the L-shaped plate (34), and a connecting plate (36) is installed at the bottom of the vertical plate (35). A pusher (37) is provided on the side of the connecting plate (36) to achieve lateral displacement. A transmission rack (38) is installed on the extended end face of the connecting plate (36). A support shaft (39) is fixed at the center of the bottom of the inner cavity of the bearing platform (31), and a transmission gear (310) is installed at the top of the support shaft (39). When the transmission rack (38) moves to mesh with the transmission gear (310) and drives the transmission gear (310) to rotate, the entire bearing platform (31) and internal structural components rotate synchronously.

2. The device for detecting the surface hardness of a ceramic grinding wheel sheet according to claim 1, characterized in that: The switching element (23) includes: The fixed plate (231), the extrusion contact (21) and the microscopic observation instrument (22) are all installed below the fixed plate (231). A secondary shaft (232) is fixed at the center of the top of the fixed plate (231), and the secondary shaft (232) is rotatably connected to the outer shell of the hardness tester body (1). The top end of the secondary shaft (232) extends through into the interior of the hardness tester body (1) and is fixed with a complete gear (233). The drive motor (234) is installed on the inner wall of the hardness tester body (1), and a half-ring gear (235) is installed at one end of the output shaft of the drive motor (234) through a coupling. When the half-ring gear (235) rotates, the teeth mesh with the complete gear (233) to drive the complete gear (233) to rotate.

3. The ceramic grinding wheel surface hardness testing device according to claim 1, characterized in that: The lifting component (32) includes a threaded column (321) that is slidably installed inside the hardness tester body (1). The top end of the threaded column (321) is rotatably connected to the bottom end of the support shaft (39). A threaded sleeve wrench (322) is threadedly connected to the outer thread of the threaded column (321). The threaded sleeve wrench (322) is rotatably connected to the groove of the hardness tester body (1). That is, when the threaded sleeve wrench (322) rotates, the threaded column (321) performs a lifting operation.

4. The ceramic grinding wheel surface hardness testing device according to claim 1, characterized in that: The movable component (33) includes: The forward and reverse lead screw (331) is rotatably installed inside the support platform (31), and one end of the forward and reverse lead screw (331) extends to the outside of the support platform (31) and is fixedly connected to a rotating handle (332). The forward and reverse lead screw (331) passes through the vertical plate (35) and slides relative to the vertical plate (35). The rotating sleeve (333) is threaded to the thread of the forward and reverse lead screw (331). An extension plate (334) is installed below the rotating sleeve (333), and a hollow frame (335) is installed on the side of the extension plate (334). The connecting plate (36) passes through the hollow part of the hollow frame (335) and slides in contact with the inner wall of the hollow frame (335).

5. The ceramic grinding wheel surface hardness testing device according to claim 4, characterized in that: The pusher (37) includes a cylinder (371) fixedly installed on one side of the extension plate (334), and a piston rod (372) is slidably installed inside the cylinder (371). One end of the piston rod (372) passes through the extension plate (334) and the hollow frame (335) in sequence and extends to the hollow part of the hollow frame (335). The end face of the piston rod (372) is connected and fixed to the side opposite to the connecting plate (36). When the pusher (37) is driven, the clamping part (4) holding the ceramic grinding wheel to be tested moves as a whole to complete the hardness test of different areas.

6. The ceramic grinding wheel surface hardness testing device according to claim 1, characterized in that: The clamping member (4) includes: A concave seat (41) is fixedly installed on the top of an L-shaped plate (34). A rotating shaft (42) is rotatably installed on the inner side of the concave seat (41), and a sector gear (43) is fixedly installed on the surface of the rotating shaft (42). An auxiliary member (44) is provided below the sector gear (43) to make the sector gear (43) rotate. A square frame (45) is fixedly installed on the arc surface of the sector gear (43), and an auxiliary clamping component (46) is provided inside the square frame (45) to achieve auxiliary clamping of the upper side of the ceramic grinding wheel where it is clamped.

7. The ceramic grinding wheel surface hardness testing device according to claim 6, characterized in that: The auxiliary component (44) includes a movable rack (441), which meshes with the tooth surface of the sector gear (43). When the movable rack (441) moves, the sector gear (43) rotates around the rotating shaft (42). A movable groove (442) is provided at the bottom of the groove of the concave seat (41). The movable rack (441) slides inside the movable groove (442). A movable rod (443) is fixedly installed on one side of the movable rack (441). The movable rod (443) extends through to the outside of the concave seat (41). An arc-shaped clamp (444) is installed at the end of the movable rod (443). A stop spring (445) is installed between the opposite side of the movable rack (441) and the opposite side of the movable groove (442). The restoring force of the stop spring (445) when it is not affected by other external forces causes the arc-shaped clamp (444) to move towards the center of the support platform (31).

8. The ceramic grinding wheel surface hardness testing device according to claim 6, characterized in that: The auxiliary pressure component (46) includes a rotating shaft (461) rotatably mounted on the inner side of the square frame (45), a vertical frame (462) fixedly mounted on the surface of the rotating shaft (461), a central shaft (463) rotatably mounted on the bottom side of the vertical frame (462), and an auxiliary pressure roller (464) rotatably mounted on the surface of the central shaft (463). The vertical frame (462) and the auxiliary pressure roller (464) remain vertically downward when the square frame (45) is tilted.

9. The ceramic grinding wheel surface hardness testing device according to claim 6, characterized in that: The top of the support platform (31) is provided with a symmetrical sliding groove (5), and the L-shaped plate (34) and the sliding groove (5) pass through and slide relative to each other. An arc-shaped baffle (6) is installed on the L-shaped plate (34) at the lower edge of the sliding groove (5). The arc-shaped baffle (6) cooperates with the concave seat (41) to limit the concave seat (41) so that the concave seat (41) can move horizontally on the support platform (31).

10. A method for testing the surface hardness of ceramic grinding wheels, using the ceramic grinding wheel surface hardness testing device as described in any one of claims 1-9, characterized in that: Specifically, the following steps are included: S1. Place the ceramic grinding wheel to be tested on the bearing part (3), and use the moving part (33) to make the clamping part (4) at the top of the L-shaped plate (34) clamp the ceramic grinding wheel to be tested; S2. Using the lifting component (32), the ceramic grinding wheel to be tested is subjected to extrusion testing with the extrusion contact (21), and the microscopic observation instrument (22) is switched to the extruded area using the switching component (23) to calculate the hardness of the current extrusion position. S3. After the initial test is completed, the pusher (37) is used to realize the overall lateral displacement of the ceramic grinding wheel to be tested, and at the same time, the transmission rack (38) is driven to move to realize the synchronous rotation of the transmission gear (310) and the entire support platform (31), thus completing the random switching of the test position of the ceramic grinding wheel to be tested. S4. After repeating steps S2 and S3 multiple times, the average value of the multiple measurement data is taken to obtain the hardness value of the ceramic grinding wheel to be tested.

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