A system and method for detecting the impact resistance of ceramic dry abrasive paper

Abstract

The present application belongs to the technical field of abrasive paper production, and particularly relates to a system and method for detecting the impact resistance of ceramic dry abrasive paper. The system comprises a double-sided abrasive paper clamping assembly and an abrasive paper impact resistance detection assembly. The clamping assembly can automatically switch and firmly clamp the single-sided and double-sided states of the abrasive paper. The detection assembly can adjust the impact weight and hammering position through a combined drop hammer and a circumferential adjustment assembly, and is suitable for detecting the gap area between the abrasive block and the chip removal hole. The detection method based on the system sequentially completes hammering detection in two positions of the single-sided state and two positions of the double-sided state, and determines whether the impact resistance of the abrasive paper is qualified. The present application has high automation degree, can improve the detection efficiency and result consistency, and is suitable for the detection requirements of improved double-sided ceramic dry abrasive paper.

Description

Technical Field

[0001] This invention belongs to the field of sandpaper production technology, specifically relating to a system and method for testing the impact resistance of ceramic dry sandpaper. Background Technology

[0002] Ceramic dry sandpaper, with its excellent wear resistance, hardness, and grinding efficiency, is widely used in various industrial fields such as machining, automotive repair, and woodworking. It is particularly suitable for use with pneumatic and electric grinding discs equipped with chip removal grooves or dust extraction holes. To achieve efficient chip removal during the grinding process and reduce the impact of dust accumulation on grinding accuracy and sandpaper life, these grinding discs typically have a negative pressure adsorption chamber (also known as a dust collection chamber or airflow chamber) designed behind the ceramic dry sandpaper. This chamber works in conjunction with a central dust collection system to create a stable negative pressure, quickly expelling the dust generated during grinding. In actual working conditions, ceramic dry sandpaper must withstand the impact load from the high-speed rotation of the grinding disc, the static load generated by negative pressure adsorption, and the mechanical impact during clamping and disassembly. Therefore, impact resistance testing is necessary.

[0003] Traditional double-sided ceramic dry sandpaper has exposed abrasive particles on both sides. During transportation, storage, and packaging, the abrasive particles are prone to friction and collision with external objects, leading to particle detachment and wear. To address this, our company has designed an improved double-sided ceramic dry sandpaper with a foldable self-packaging structure. When not in use, folding the sandpaper allows the coarse and fine abrasive protrusions to be misaligned and engaged, completely enclosing the abrasive particles on both sides within the sandpaper, effectively preventing wear caused by exposed abrasive particles. In use, simply tear the sandpaper open and reverse the direction to align the chip removal holes and secure it for quick assembly, exposing the coarse and fine abrasive protrusions on both sides to meet different grinding precision requirements.

[0004] Existing systems and methods for testing the impact resistance of ceramic dry sandpaper have shortcomings. They cannot meet the impact resistance testing requirements of improved double-sided ceramic dry sandpaper in both single-sided and double-sided use, specifically at the abrasive bumps and chip removal holes. The testing process has a low degree of automation and is easily affected by human error, which can impact the consistency and reliability of the test results.

[0005] In view of this, the inventors hope to optimize and improve the existing ceramic dry sandpaper impact resistance testing system and method. Summary of the Invention

[0006] The purpose of this invention is to overcome at least one of the above-mentioned problems existing in the prior art and to provide a system and method for testing the impact resistance of ceramic dry sandpaper.

[0007] To achieve the above-mentioned technical objectives and effects, the present invention is implemented through the following technical solution: This invention provides a ceramic dry sandpaper impact resistance testing system, including a double-sided sandpaper clamping assembly for adsorbing and holding double-sided sandpaper and a sandpaper impact resistance testing assembly disposed thereon; The sandpaper impact resistance testing assembly includes a testing base, a lifting push rod, a suspension component, a drop hammer cylinder, a combined drop hammer, a water tank, a hose, a height adjustment and reset component, and a circumferential adjustment component. The lifting push rod is mounted on the lower side of the testing base. The movable end of the lifting push rod is supported by the drop hammer cylinder via the suspension component. The combined drop hammer is internally restricted within the drop hammer cylinder. The combined drop hammer consists of a carrier plate, a counterweight water storage box, a hammer rod, and a hammer pressure plate. The carrier plate is slidably restricted within the drop hammer cylinder. A counterweight water storage box is mounted on the upper side of the carrier plate. The center of the upper side of the counterweight water storage box... The system includes a locking groove with a connecting pipe on its bottom surface. Several hammer pressure plates arranged in a circular array are supported on the underside of the carrier plate by a hammer rod. A water tank is installed on the outer side of the top plate of the falling hammer cylinder, containing a built-in integrated pump for pumping water. This pump can inject or pump water into the counterweight water storage box via a hose connected to the connecting pipe, adjusting the overall counterweight of the combined falling hammer. A height adjustment and reset assembly for locking the combined falling hammer is installed on the side of the falling hammer cylinder, and a circumferential adjustment assembly for adjusting the circumferential position of the combined falling hammer is installed at the bottom of the falling hammer cylinder.

[0008] Furthermore, in the above-mentioned ceramic dry sandpaper impact resistance testing system, the double-sided sandpaper to be tested includes a connecting strip and circular base paper on both sides. A central hole is provided in the center of the circular base paper. One side of the circular base paper has multiple ceramic abrasive bumps arranged in a ring array around the central hole. The ceramic abrasive bumps themselves have a fan-shaped ring structure. A row of chip removal holes is provided in the area between two adjacent ceramic abrasive bumps on the circular base paper. An annular adhesive layer with a release liner is provided on the other side of the circular base paper near the outer edge. A tear line is provided in the middle of the connecting strip. The ceramic abrasive bumps of two circular base papers can be interlocked after being folded and pressed together.

[0009] Furthermore, in the above-mentioned ceramic dry sandpaper impact resistance testing system, the included angle of the center of the ceramic abrasive bump is 10 to 20 degrees, and the included angle of the center of the area between two adjacent ceramic abrasive bumps is 10 to 20 degrees; the diameter of the chip removal hole gradually increases from the inside to the outside, and the annular adhesive layer is located at the periphery of the corresponding ceramic abrasive bump and chip removal hole.

[0010] Furthermore, in the aforementioned ceramic dry sandpaper impact resistance testing system, the double-sided sandpaper clamping assembly includes a clamping base, a horizontal flipping motor, a fixed mounting plate, hinges, a movable mounting plate, an annular suction cup, a vacuum pump, a belt drive, and a vertical flipping motor. The clamping base is supported by the horizontal flipping motor and has a fixed mounting plate. The fixed mounting plate is connected to the movable mounting plate via two side-by-side hinges. Each of the fixed and movable mounting plates has a detection through hole. An annular suction cup is installed around the detection through holes on the fixed and movable mounting plates. A vacuum pump for evacuating the annular suction cup is installed on the fixed and movable mounting plates. A vertical flipping motor is installed on the lower side of the fixed mounting plate. The output shaft of the vertical flipping motor is connected to the rotating shaft of one of the hinges via a belt drive.

[0011] Furthermore, in the above-mentioned ceramic dry sandpaper impact resistance testing system, the fixed mounting plate and the moving mounting plate are generally arch-shaped, the specifications of the annular suction cup are matched with the specifications of the annular adhesive layer, and both the fixed mounting plate and the moving mounting plate have built-in suction pipes for connecting the annular suction cup and the vacuum pump.

[0012] Furthermore, in the above-mentioned ceramic dry sandpaper impact resistance testing system, the height adjustment and reset assembly includes a lead screw support, a height adjustment motor, a height adjustment lead screw, a guide rod, a height adjustment plate, and a locking mechanism. The lead screw support is equipped with a guide rod and a height adjustment lead screw that is driven to rotate by the height adjustment motor. A height adjustment plate is sleeved on the outer side of the height adjustment lead screw and the guide rod. A locking mechanism that cooperates with the locking groove in the counterweight water storage box is installed on the lower side of the outer end of the height adjustment plate. An upper clearance hole for avoiding the flexible hose is provided on the height adjustment plate.

[0013] Furthermore, in the aforementioned ceramic dry sandpaper impact resistance testing system, the locking groove is a cylindrical stepped groove that is narrow at the top and wide at the bottom; the locking mechanism consists of a cover box, a rotary driver, a movable disc, and a locking component; the cover box and the rotary driver are fixed to the lower side of the height adjustment plate, and the rotary driver is located inside the cover box; the outer end plate of the cover box has a lower clearance hole for avoiding the flexible hose and several radial grooves evenly distributed around the lower clearance hole; the movable end of the rotary driver supports the movable disc; the movable disc has a middle clearance hole for avoiding the flexible hose and several oblique grooves evenly distributed around the middle clearance hole; the cross-section of the oblique groove is T-shaped; the locking component consists of a limiting head, a sliding plate, and a locking plate in sequence; the limiting head slides and is restricted in the corresponding oblique groove; the sliding plate slides and is restricted in the corresponding radial groove; the locking plate can move radially into the lower wide cavity of the locking groove to achieve locking or move out of the lower wide cavity of the locking groove to achieve unlocking.

[0014] Furthermore, in the above-mentioned ceramic dry sandpaper impact resistance testing system, the number of hammer pressure plates is equal to the number of ceramic abrasive bumps. The circumferential adjustment component enables the hammer pressure plates to switch between two hammer pressure positions: one with the corresponding ceramic abrasive bump and the other in the gap area between two adjacent ceramic abrasive bumps. The circumferential adjustment component includes an adjustment motor, a gear, and a pressure plate. The adjustment motor is embedded in the drop hammer cylinder, and a gear is installed at the output end of the adjustment motor. The outer periphery of the pressure plate has an annular groove, and the pressure plate has an incomplete tooth groove in the annular groove that mates with the gear. The pressure plate has a through hole along the axial direction to facilitate the passage of the hammer rod, and the cross-section of the hammer rod is rectangular or circular.

[0015] Furthermore, in the above-mentioned ceramic dry sandpaper impact resistance testing system, the side wall of the drop hammer cylinder is provided with a strip-shaped hole to facilitate the vertical displacement of the height adjustment plate, and the drop hammer cylinder is provided with a support protrusion ring that cooperates with the annular groove in the pressure plate near the bottom opening; the outer diameter of the carrier plate is matched with the inner diameter of the drop hammer cylinder, and the outer edge of the carrier plate is provided with a clearance notch for avoiding the adjustment motor.

[0016] This invention also provides a method for testing the impact resistance of dry ceramic sandpaper, based on the aforementioned system for testing the impact resistance of dry ceramic sandpaper, comprising the following steps: S1. When performing single-sided impact resistance test, adjust the fixed mounting plate and the moving mounting plate of the double-sided sandpaper clamping assembly to the horizontal unfolded state, lay the double-sided sandpaper to be tested flat on the fixed mounting plate and the moving mounting plate, and make the ceramic abrasive protrusion face upwards. Use the ring suction cup to adsorb and lock the two circular base papers. First, the sandpaper on the mounting plate is tested. The impact resistance testing component for sandpaper is pre-adjusted according to the requirements of single-sided impact resistance testing. The overall counterweight of the combined drop hammer and its hammer pressure release height are adjusted. The hammer pressure position of the hammer pressure plate is adjusted to face the ceramic abrasive protrusion using the circumferential adjustment component to perform the first hammer pressure. The combined drop hammer is reset using the height adjustment and reset component. The hammer pressure position of the hammer pressure plate is adjusted to face the gap area between two adjacent ceramic abrasive protrusions using the circumferential adjustment component to perform the second hammer pressure. Then, the horizontal flipping motor drives the fixed mounting plate and the moving mounting plate to flip and change positions, and the sandpaper on the moving mounting plate is inspected; S2. When performing double-sided impact resistance testing, adjust the fixed mounting plate and moving mounting plate of the double-sided sandpaper clamping assembly to a horizontally unfolded state. Tear the double-sided sandpaper to be tested along the tear line, lay one of the circular base papers flat on the fixed mounting plate with the ceramic abrasive protrusions facing down, and use the annular suction cup to adsorb and lock the circular base paper. Then, attach the other circular base paper to the locked circular base paper by adhesive, ensuring that the chip removal holes are connected one by one. The vertical flipping motor of the double-sided sandpaper clamping assembly drives the fixed mounting plate to flip and press it onto the other circular base paper via the belt drive, and use the annular suction cup to adsorb and lock the circular base paper. The sandpaper impact resistance testing component is designed to meet the requirements of double-sided impact resistance testing. It pre-adjusts the overall weight of the combined drop hammer and its hammer release height. The circumferential adjustment component adjusts the hammer pressure plate to face the ceramic abrasive protrusions for the third hammer press. The height reset component resets the combined drop hammer, and the circumferential adjustment component adjusts the hammer pressure plate to face the gap between two adjacent ceramic abrasive protrusions for the fourth hammer press. S3. If the double-sided sandpaper does not show obvious damage after four hammering tests, the impact resistance test is deemed to have passed; otherwise, the impact resistance test is deemed to have failed.

[0017] The beneficial effects of this invention are: 1. This invention can adapt to the testing requirements of improved double-sided ceramic dry sandpaper, and can simultaneously complete the impact resistance test of two key locations: single-sided and double-sided sandpaper, as well as the ceramic abrasive bumps and chip removal hole gap area. The test coverage is comprehensive and closely matches the stress scenarios of sandpaper in actual working conditions.

[0018] 2. The double-sided sandpaper clamping assembly adopts an arch-shaped plate structure, with a ring suction cup precisely matching the ring adhesive layer of the sandpaper, enabling automatic flipping and pressing actions. By using a vacuum pump to create negative pressure adsorption, the sandpaper can be tightly fixed. At the same time, the design of the detection through hole does not obstruct the detection area, ensuring that the hammer impact is accurately applied to the target position. The combination of vertical and horizontal flipping motors allows for convenient switching between different sides and positions of the sandpaper for detection, improving detection efficiency.

[0019] 3. The combined drop hammer adopts a water-storage counterweight design. Water is injected or pumped into the counterweight water tank via an integrated pump, allowing continuous adjustment of the counterweight size to accommodate different impact load requirements. The circumferential adjustment component can precisely switch the hammer pressure position of the hammer plate, enabling targeted testing of abrasive protrusions and chip removal hole gap areas. The lifting push rod can adjust the overall height of the drop hammer cylinder to accommodate testing requirements of sandpaper of different thicknesses. The sliding of the combined drop hammer is restricted within the drop hammer cylinder, ensuring a stable movement trajectory and preventing deviation during hammering.

[0020] 4. The height adjustment and reset component can realize the reset and height adjustment of the combined drop hammer. At the same time, the height adjustment and reset component can avoid the adaptive extension and retraction of the hose with the combined drop hammer.

[0021] Of course, any product implementing this invention does not necessarily need to achieve all of the above advantages at the same time. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram showing the unfolded double-sided sandpaper in this invention; Figure 3 This is a schematic diagram of the double-sided sandpaper in its folded state when not in use, according to the present invention. Figure 4 This is a schematic diagram of the folded state of the double-sided sandpaper used in this invention; Figure 5 This is a schematic diagram of the unfolded state of the double-sided sandpaper clamping assembly in this invention; Figure 6 This is a schematic diagram of the first usage state of the double-sided sandpaper clamping assembly in this invention; Figure 7 This is a schematic diagram of the double-sided sandpaper clamping assembly in the folded state of the present invention; Figure 8 This is a schematic diagram of the second usage state of the double-sided sandpaper clamping assembly in this invention; Figure 9 This is a schematic diagram of the sandpaper impact resistance testing component in this invention; Figure 10 This is a schematic diagram showing the position of the circumferential adjustment component in this invention; Figure 11 This is a schematic diagram of the combined falling hammer in this invention; Figure 12 This is a top view of the combined falling hammer in this invention; Figure 13 This is a schematic diagram of the structure of the height adjustment and reset component in this invention, showing one angle. Figure 14 This is a schematic diagram of another angle of the height adjustment and reset component in this invention; Figure 15 This is a schematic diagram of the locking mechanism in this invention; Figure 16This is a schematic diagram of the circumferential adjustment component in this invention; In the attached diagram, the components represented by each number are as follows: 1-Double-sided sandpaper clamping assembly, 101-Clamping base, 102-Horizontal flipping motor, 103-Fixed mounting plate, 104-Hinge, 105-Moving mounting plate, 106-Detection through hole, 107-Annular suction cup, 108-Vacuum pump, 109-Belt drive component, 110-Vertical flipping motor; 2-Sandpaper impact resistance testing component; 21-Testing base; 22-Lifting push rod; 23-Suspension component; 24-Falling hammer cylinder; 241-Strip hole; 242-Supporting protrusion ring; 25-Combined falling hammer; 251-Carrier plate; 252-Counterweight water storage box; 253-Locking groove; 254-Hammer rod; 255-Hammer pressure plate; 26-Water tank; 27-Hose; 28-Height adjustment and reset component; 281-Screw bracket; 282-Height adjustment motor; 283-Height adjustment screw; 284-Guide rod; 285-Height adjustment plate. 285a-Upper clearance hole, 286-Cover box, 286a-Lower clearance hole, 286b-Radial slide groove, 287-Rotary drive, 288-Moving disc, 288a-Intermediate clearance hole, 288b-Slanted slide groove, 289-Locking component, 289a-Limit head, 289b-Slide plate, 289c-Locking plate, 29-Circumferential adjustment component, 291-Adjusting motor, 292-Gear, 293-Pressure plate, 293a-Annular groove, 293b-Incomplete tooth groove, 293c-Through rod hole; 3-Double-sided sandpaper, 301-Connecting strip, 302-Circular base paper, 303-Center hole, 304-Ceramic abrasive bump, 305-Chip removal hole, 306-Annular adhesive layer, 307-Tear line. Detailed Implementation

[0024] 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.

[0025] like Figure 1 As shown, this embodiment provides a ceramic dry sandpaper impact resistance testing system, including a double-sided sandpaper clamping component 1 for adsorbing and holding double-sided sandpaper 3 and a sandpaper impact resistance testing component 2 disposed thereon.

[0026] like Figures 2-4As shown, the double-sided sandpaper 3 to be tested includes a connecting strip 301 and circular base paper 302 on both sides. A central hole 303 is formed at the center of the circular base paper 302. One side of the circular base paper 302 has multiple ceramic abrasive bumps 304 arranged in a ring array around the central hole 303. Each ceramic abrasive bump 304 has a fan-shaped ring structure, with the included angle between the centers of the corresponding ceramic abrasive bumps 304 being 10–20 degrees. The included angle between the centers of adjacent ceramic abrasive bumps 304 is also 10–20 degrees. A row of chip removal holes 305 is formed in the area between adjacent ceramic abrasive bumps 304 on the circular base paper 302, with the diameter of the chip removal holes 305 gradually increasing from the inside out. The other side of the circular base paper 302 has an annular adhesive layer 306 with a release liner near its outer edge, located around the periphery of the corresponding ceramic abrasive bumps 304 and chip removal holes 305. The connecting strip 301 has a tear line 307 in the middle, and the ceramic abrasive protrusions 304 of the two circular base papers 302 can be interlocked after being folded and pressed together.

[0027] like Figures 5-8 As shown, the double-sided sandpaper clamping assembly 1 includes a clamping base 101, a horizontal flipping motor 102, a fixed mounting plate 103, hinges 104, a movable mounting plate 105, an annular suction cup 107, a vacuum pump 108, a belt drive component 109, and a vertical flipping motor 110. The clamping base 101 is supported by the fixed mounting plate 103 via the horizontal flipping motor 102. The fixed mounting plate 103 is connected to the movable mounting plate 105 via two side-by-side hinges 104. The fixed mounting plate 103 and the movable mounting plate 105 each have a detection through hole 106. The annular suction cup 107 is installed on the fixed mounting plate 103 and the movable mounting plate 105 at the periphery of the detection through hole 106. The vacuum pump 108 for evacuating the annular suction cup 107 is installed on the fixed mounting plate 103 and the movable mounting plate 105. A vertical tilting motor 110 is installed on the lower side of the fixed mounting plate 103. The output shaft of the vertical tilting motor 110 is connected to the rotating shaft of one of the assembled pages 104 via a belt drive 109. The movable mounting plate 105 can rotate synchronously with the rotating shaft.

[0028] In this embodiment, the fixed mounting plate 103 and the movable mounting plate 105 are generally arch-shaped plate structures. The specifications of the annular suction cup 107 are matched with the specifications of the annular adhesive layer 306. Both the fixed mounting plate 103 and the movable mounting plate 105 have built-in suction pipes for connecting the annular suction cup 107 and the vacuum pump 108.

[0029] The working principle of the double-sided sandpaper clamping assembly 1 is as follows: The fixed mounting plate 103 and the movable mounting plate 105 are connected by a hinge 104 to form an unfoldable and flipable clamping platform. The overall structure adopts an arch-shaped plate structure, which ensures its own structural strength and can adapt to the shape of the sandpaper. Both have detection through holes 106 to avoid the hammer pressure plate 255 and ensure that the hammer pressure impact can directly act on the detection area of ​​the sandpaper. The built-in suction tube is used to connect the annular suction cup 107 and the vacuum pump 108 to provide a channel for negative pressure adsorption. The hinge 104 serves as the connecting component between the fixed mounting plate 103 and the movable mounting plate 105. Its shaft is connected to the belt drive component 109. Driven by the vertical flipping motor 110, it can drive the movable mounting plate 105 to flip, realizing the switching between two states: horizontal unfolding (for single-sided detection) and flipping pressing (for double-sided detection). The specifications of the annular suction cup 107 are matched with the annular adhesive layer 306 of the sandpaper. When the vacuum pump 108 is working, the air between the annular suction cup 107 and the sandpaper is drawn out through the suction tube to form a negative pressure, thereby tightly adsorbing the sandpaper onto the fixed mounting plate 103 or the movable mounting plate 105, realizing the stable locking of the sandpaper and preventing the sandpaper from shifting during the hammering process. After the test is completed, the vacuum pump 108 stops working, the negative pressure is released, and the sandpaper can be easily removed.

[0030] like Figures 9-12 As shown, the sandpaper impact resistance testing component 2 includes a testing base 21, a lifting push rod 22, a suspension component 23, a drop hammer cylinder 24, a combined drop hammer 25, a water tank 26, a hose 27, a height adjustment and reset component 28, and a circumferential adjustment component 29. The lifting push rod 22 is installed on the lower side of the testing base 21. The movable end of the lifting push rod 22 is supported by the drop hammer cylinder 24 via the suspension component 23. The suspension component 23 consists of an upper connecting block, a lower connecting block, and connecting columns evenly distributed circumferentially between them. The upper connecting block is fixed to the movable end of the lifting push rod 22, and the lower connecting block is fixed to the top plate of the drop hammer cylinder 24 by several bolts. A through-hole is provided at the center of the lower connecting block. The internal movement of the falling hammer cylinder 24 is restricted by a combined falling hammer 25, which consists of a carrier plate 251, a counterweight water storage box 252, a hammer rod 254, and a hammer pressure plate 255. The carrier plate 251 is slidably restricted within the falling hammer cylinder 24. The counterweight water storage box 252 is installed on the upper side of the carrier plate 251, and a locking groove 253 is provided at the center of the upper side of the counterweight water storage box 252. The bottom surface of the locking groove 253 is provided with a connecting pipe. Several hammer pressure plates 255 arranged in a circular array are supported on the lower side of the carrier plate 251 by the hammer rod 254. A water tank 26 is installed on the outer side of the top plate of the drop hammer cylinder 24. The water tank 26 has a built-in pump for pumping water. The pump can inject or pump water into the counterweight water storage box 252 through the hose 27 connected to the pipe port, and adjust the overall counterweight of the combined drop hammer 25. A height adjustment and reset component 28 for locking the combined drop hammer 25 is installed on the side of the drop hammer cylinder 24. A circumferential adjustment component 29 for adjusting the circumferential position of the combined drop hammer 25 is installed at the bottom of the drop hammer cylinder 24.

[0031] likeFigures 13-14 As shown, the height adjustment and reset assembly 28 includes a lead screw support 281, a height adjustment motor 282, a height adjustment lead screw 283, a guide rod 284, a height adjustment plate 285, and a locking mechanism. The lead screw support 281 is equipped with the guide rod 284 and the height adjustment lead screw 283, which is driven to rotate by the height adjustment motor 282. The height adjustment plate 285 is sleeved on the outer side of the height adjustment lead screw 283 and the guide rod 284. A locking mechanism is installed on the lower outer end of the height adjustment plate 285, which cooperates with the locking groove 253 in the counterweight water storage box 252. The locking groove 253 is a cylindrical stepped groove that is narrower at the top and wider at the bottom. The height adjustment plate 285 has an upper clearance hole 285a for avoiding the flexible hose 27.

[0032] like Figure 15 As shown, the locking mechanism consists of a cover 286, a rotary actuator 287, a movable disc 288, and a locking member 289. The cover 286 and the rotary actuator 287 are fixed to the lower side of the height adjustment plate 285, with the rotary actuator 287 located inside the cover 286. The outer end plate of the cover 286 has a lower clearance hole 286a for avoiding the flexible hose 27 and several radial grooves 286b evenly distributed around the lower clearance hole 286a. The movable end of the rotary actuator 287 supports the movable disc 288, which has a middle clearance hole 288a for avoiding the flexible hose 27 and several oblique grooves 288b evenly distributed around the middle clearance hole 288a. The cross-section of the oblique grooves 288b is T-shaped. The locking member 289 is composed of a limiting head 289a, a sliding plate 289b, and a locking plate 289c in sequence. The limiting head 289a is slidably restricted in the corresponding inclined slide groove 288b, and the sliding plate 289b is slidably restricted in the corresponding radial slide groove 286b. The locking plate 289c can move radially into the lower wide cavity of the locking groove 253 along with the locking member 289 to achieve locking or move out of the lower wide cavity of the locking groove 253 to achieve unlocking.

[0033] In this embodiment, the number of hammer pressure plates 255 is equal to the number of ceramic abrasive bumps 304. The circumferential adjustment component 29 enables the hammer pressure plates 255 to switch between two hammer pressure positions: one with the corresponding ceramic abrasive bump 304 and the other in the gap area between two adjacent ceramic abrasive bumps 304.

[0034] like Figure 16 As shown, the circumferential adjustment assembly 29 includes an adjustment motor 291, a gear 292, and a pressure plate 293. The adjustment motor 291 is embedded in the drop hammer cylinder 24. The output end of the adjustment motor 291 is equipped with a gear 292. The outer periphery of the pressure plate 293 is provided with an annular groove 293a. The pressure plate 293 is provided with an incomplete tooth groove 293b that cooperates with the gear in the annular groove 293a. The pressure plate 293 is provided with a through hole 293c along the axial direction to facilitate the passage of the hammer rod 254. The cross-section of the hammer rod 254 is rectangular or circular.

[0035] In this embodiment, the side wall of the drop hammer cylinder 24 is provided with a strip hole 241 to facilitate the vertical displacement of the height adjustment plate 285. The drop hammer cylinder 24 is provided with a support protrusion ring 242 near the bottom opening, which cooperates with the annular groove 293a in the pressure plate 293. The outer diameter of the carrier plate 251 is matched with the inner diameter of the drop hammer cylinder 24. The outer edge of the carrier plate 251 is provided with a clearance notch for avoiding the adjustment motor 291.

[0036] The sandpaper impact resistance testing component 2 is used to control the hammer impact, including counterweight adjustment, height adjustment, circumferential position adjustment, and hammer reset. The working principle of each component is as follows: The suspension component 23 is used to connect the lifting push rod 22 and the drop hammer cylinder 24, which not only ensures the connection is firm, but also avoids the hose 27, providing space for the arrangement of the hose 27, and at the same time can distribute the weight of the drop hammer cylinder 24 to avoid excessive local stress.

[0037] The drop hammer cylinder 24 provides movement space and guidance for the combined drop hammer 25. The carrier plate 251 of the combined drop hammer 25 is slidably restricted within the drop hammer cylinder 24 to ensure that the combined drop hammer 25 moves axially during the hammering process and avoids deviation. The strip hole 241 on the side wall is used to avoid the height adjustment plate 285, ensuring that the height adjustment plate 285 can move vertically smoothly. The support protrusion ring 242 at the bottom is used to support the pressure plate 293 of the circumferential adjustment component 29, ensuring the stable rotation of the pressure plate 293.

[0038] The combined drop hammer 25, as the actuator for hammer impact, can slide along the axial direction of the drop hammer cylinder 24, and its hammer pressure is determined by its own counterweight. The carrier plate 251, which slides within the drop hammer cylinder 24, supports the counterweight water storage box 252, the hammer rod 254, and the hammer pressure plate 255. Its outer diameter matches the inner diameter of the drop hammer cylinder 24 to ensure smooth sliding without deviation. The clearance notch on the outer edge avoids interference with the adjusting motor 291 during movement. The counterweight water storage box 252 stores water to adjust the overall counterweight of the combined drop hammer 25. Its top locking groove 253 engages with the locking member 289 of the height adjustment and reset assembly 28 to lock and reset the combined drop hammer 25. The bottom connecting port connects to the hose 27 for water injection and pumping. The hammer rod 254 connects the carrier plate 251 and the hammer pressure plate 255, transferring the gravity of the combined drop hammer 25 to the hammer pressure plate 255. The hammer pressure plate 255 is arranged in a ring array, with the number equal to that of the ceramic abrasive protrusions 304, allowing it to precisely act on the gap area where the ceramic abrasive protrusions 304 or chip removal holes 305 are located, achieving targeted hammer impact. When the integrated pump built into the water tank 26 is working, it can inject water into the counterweight water storage box 252 (increasing the counterweight) or pump water (reducing the counterweight), thereby continuously adjusting the overall counterweight of the combined drop hammer 25 to adapt to the detection requirements of different impact loads. The hose 27 can flexibly deform with the lifting and circumferential rotation of the combined drop hammer 25 without affecting the movement of each component.

[0039] The height adjustment and reset assembly 28 is used to adjust the height of the combined drop hammer 25 and reset it after hammering. It also locks the combined drop hammer 25 to ensure precise and controllable height during hammering. The working principle of each component is as follows: When the height adjustment motor 282 is working, it drives the height adjustment screw 283 to rotate. Since the height adjustment plate 285 is threadedly engaged with the height adjustment screw 283 and is limited by the guide rod 284, it drives the locking component 289 and the combined drop hammer 25 to rise and fall synchronously, thus adjusting the hammering height of the combined drop hammer 25. The guide rod 284 is used to limit the movement trajectory of the height adjustment plate 285, ensuring its vertical displacement is stable and without deviation. The upper clearance hole 285a on the height adjustment plate 285 is used to avoid interference between the hose 27 and the height adjustment plate 285, ensuring that the height adjustment plate 285 can rise and fall smoothly.

[0040] When the rotary drive 287 of the locking component 289 is working, it drives the movable disk 288 to rotate. The inclined slide groove 288b on the movable disk 288 cooperates with the limiting head 289a of the locking component 289. Since the sliding of the limiting head 289a is restricted within the inclined slide groove 288b, and the sliding of the slide plate 289b is restricted within the radial slide groove 286b of the cover box 286, the rotation of the movable disk 288 will drive the locking component 289 to slide radially. When the locking plate 289c moves radially into the lower wide cavity of the locking groove 253, the combined drop hammer 25 is locked, which facilitates height adjustment or reset. When the locking plate 289c moves radially out of the locking groove 253, the combination drop hammer 25 is unlocked, and the combined drop hammer 25 falls under its own gravity to complete the hammer impact. The cover box 286 is used to protect the internal components, and the lower clearance hole 286a is used to avoid the hose 27 to prevent interference.

[0041] The adjustment motor 291 of the circumferential adjustment component 29 is embedded in the drop hammer cylinder 24. When working, it drives the gear 292 to rotate. The gear 292 meshes with the incomplete tooth groove 293b of the pressure plate 293, and transmits power to the pressure plate 293. The annular groove 293a on the outer periphery of the pressure plate 293 cooperates with the support protrusion 242 of the drop hammer cylinder 24 to ensure that the pressure plate 293 can rotate stably; the incomplete toothed groove 293b cooperates with the gear 292 to achieve precise rotation of the pressure plate 293; the rod hole 293c is used to pass through the hammer rod 254. Since the hammer rod 254 cooperates with the rod hole 293c, when the pressure plate 293 rotates, it will drive the hammer rod 254 and the hammer pressure plate 255 to rotate synchronously, thereby switching the circumferential position of the hammer pressure plate 255 to achieve targeted hammering of the gap area where the ceramic abrasive protrusion 304 or the chip removal hole 305 is located; the design of the incomplete toothed groove 293b can limit the rotation range of the pressure plate 293 to avoid excessive rotation causing the position of the hammer pressure plate 255 to shift, and the hose 27 can adapt to a certain angle of torsion.

[0042] This embodiment also provides a method for testing the impact resistance of ceramic dry sandpaper, including the following steps: S1. When performing single-sided impact resistance test, adjust the fixed mounting plate 103 and the movable mounting plate 105 of the double-sided sandpaper clamping assembly 1 to the horizontal unfolded state, lay the double-sided sandpaper 3 to be tested flat on the fixed mounting plate 103 and the movable mounting plate 105, and make the ceramic abrasive protrusion 304 face upward, and use the annular suction cup 107 to adsorb and lock the two circular base papers 302. First, the sandpaper on the mounting plate 103 is tested. The sandpaper impact resistance testing component 2 pre-adjusts the overall counterweight of the combined drop hammer 25 and its hammer release height according to the requirements of single-sided impact resistance testing. The hammer pressure plate 255 is adjusted to face the ceramic abrasive protrusion 304 using the circumferential adjustment component 29 for the first hammer pressure test. The combined drop hammer 25 is reset using the height adjustment and reset component 28. The hammer pressure plate 255 is adjusted to face the gap area between two adjacent ceramic abrasive protrusions 304 using the circumferential adjustment component 29 for the second hammer pressure test. Then, the horizontal flipping motor 102 drives the fixed mounting plate 103 and the moving mounting plate 105 to flip and change positions, and to inspect the sandpaper on the moving mounting plate 105; S2. When performing double-sided impact resistance testing, adjust the fixed mounting plate 103 and the movable mounting plate 105 of the double-sided sandpaper clamping assembly 1 to a horizontally unfolded state. Tear the double-sided sandpaper 3 to be tested through the tear line 307, lay one of the circular base papers 302 flat on the fixed mounting plate 103 with the ceramic abrasive protrusion 304 facing down, and use the annular suction cup 107 to adsorb and lock the circular base paper 302. Then, attach the other circular base paper 302 to the locked circular base paper 302 by adhesive, and make the chip removal holes 305 connected one by one. The vertical flipping motor 110 of the double-sided sandpaper clamping assembly 1 drives the fixed mounting plate 103 to flip and press it onto the other circular base paper 302 via the belt drive component 109, and use the annular suction cup 107 to adsorb and lock the circular base paper 302. According to the requirements of double-sided impact resistance testing, the sandpaper impact resistance testing component 2 pre-adjusts the overall counterweight of the combined drop hammer 25 and its hammer pressure release height. The circumferential adjustment component 29 is used to adjust the hammer pressure position of the hammer pressure plate 255 to face the ceramic abrasive protrusion 304 for the third hammer pressure. The height adjustment and reset component 28 is used to reset the combined drop hammer 25. The circumferential adjustment component 29 is used to adjust the hammer pressure position of the hammer pressure plate 255 to face the gap area between two adjacent ceramic abrasive protrusions 304 for the fourth hammer pressure. S3. If the double-sided sandpaper 3 does not show obvious damage after four hammering tests, the impact resistance test is deemed to have passed; otherwise, the impact resistance test is deemed to have failed.

[0043] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A ceramic dry sandpaper impact resistance testing system, characterized in that, Includes a double-sided sandpaper clamping assembly for adsorbing and holding double-sided sandpaper, and a sandpaper impact resistance testing assembly disposed thereon; The sandpaper impact resistance testing assembly includes a testing base, a lifting push rod, a suspension component, a drop hammer cylinder, a combined drop hammer, a water tank, a hose, a height adjustment and reset component, and a circumferential adjustment component. The lifting push rod is mounted on the lower side of the testing base. The movable end of the lifting push rod is supported by the drop hammer cylinder via the suspension component. The combined drop hammer is internally restricted within the drop hammer cylinder. The combined drop hammer consists of a carrier plate, a counterweight water storage box, a hammer rod, and a hammer pressure plate. The carrier plate is slidably restricted within the drop hammer cylinder. A counterweight water storage box is mounted on the upper side of the carrier plate. The center of the upper side of the counterweight water storage box... The system includes a locking groove with a connecting pipe opening on its bottom surface. Several hammer pressure plates arranged in a circular array are supported on the lower side of the carrier plate by a hammer rod. A water tank is installed on the outer side of the top plate of the falling hammer cylinder, containing a built-in integrated pump for pumping water. This pump can inject or pump water into the counterweight water storage box via a hose connected to the connecting pipe opening, adjusting the overall counterweight of the combined falling hammer. A height adjustment and reset assembly for locking the combined falling hammer is installed on the side of the falling hammer cylinder, and a circumferential adjustment assembly for adjusting the circumferential position of the combined falling hammer is installed at the bottom of the falling hammer cylinder. The double-sided sandpaper to be tested includes a connecting strip and circular base paper on both sides. A central hole is provided in the center of the circular base paper. One side of the circular base paper has multiple ceramic abrasive bumps arranged in a ring array around the central hole. The ceramic abrasive bumps themselves have a fan-shaped ring structure. A row of chip removal holes is provided in the area between two adjacent ceramic abrasive bumps on the circular base paper. The other side of the circular base paper has an annular adhesive layer with a release liner near the outer edge. A tear line is provided in the middle of the connecting strip. The ceramic abrasive bumps of two circular base papers can be interlocked after being folded and pressed together. The double-sided sandpaper clamping assembly includes a clamping base, a horizontal flipping motor, a fixed mounting plate, hinges, a movable mounting plate, an annular suction cup, a vacuum pump, a belt drive, and a vertical flipping motor. The clamping base is supported by the horizontal flipping motor and has a fixed mounting plate. The fixed mounting plate is connected to the movable mounting plate via two side-by-side hinges. Each of the fixed and movable mounting plates has a detection through hole. An annular suction cup is installed around the detection through holes on the fixed and movable mounting plates. A vacuum pump for evacuating the annular suction cup is installed on the fixed and movable mounting plates. A vertical flipping motor is installed on the lower side of the fixed mounting plate. The output shaft of the vertical flipping motor is connected to the rotating shaft of one of the hinges via a belt drive.

2. The ceramic dry sandpaper impact resistance testing system according to claim 1, characterized in that, The included angle between the centers of the ceramic abrasive bumps is 10 to 20 degrees, and the included angle between the centers of the regions between two adjacent ceramic abrasive bumps is 10 to 20 degrees; the diameter of the chip removal hole gradually increases from the inside to the outside, and the annular adhesive layer is located at the periphery of the corresponding ceramic abrasive bump and chip removal hole.

3. The ceramic dry sandpaper impact resistance testing system according to claim 2, characterized in that, The fixed mounting plate and the movable mounting plate are generally arch-shaped. The specifications of the annular suction cup are matched with the specifications of the annular adhesive layer. Both the fixed mounting plate and the movable mounting plate have built-in suction pipes for connecting the annular suction cup and the vacuum pump.

4. The ceramic dry sandpaper impact resistance testing system according to claim 3, characterized in that, The height adjustment and reset assembly includes a lead screw support, a height adjustment motor, a height adjustment lead screw, a guide rod, a height adjustment plate, and a locking mechanism. The lead screw support is equipped with a guide rod and a height adjustment lead screw that is driven to rotate by the height adjustment motor. A height adjustment plate is sleeved on the outer side of the height adjustment lead screw and the guide rod. A locking mechanism that cooperates with the locking groove in the counterweight water storage box is installed on the lower side of the outer end of the height adjustment plate. An upper clearance hole for avoiding the hose is provided on the height adjustment plate.

5. The ceramic dry sandpaper impact resistance testing system according to claim 4, characterized in that, The locking groove is a cylindrical stepped groove that is narrower at the top and wider at the bottom; the locking mechanism consists of a cover box, a rotary drive, a movable disc, and a locking component; the cover box and the rotary drive are fixed to the lower side of the height adjustment plate, and the rotary drive is located inside the cover box. The outer end plate of the cover box has a lower clearance hole for avoiding the flexible hose and several radial grooves evenly distributed around the lower clearance hole. The movable end of the rotary drive supports the movable disc. The movable disc has a middle clearance hole for avoiding the flexible hose and several oblique grooves evenly distributed around the middle clearance hole. The cross-section of the oblique groove is T-shaped; the locking component consists of a limiting head, a sliding plate, and a locking plate in sequence. The limiting head slides and is restricted in the corresponding oblique groove. The sliding plate slides and is restricted in the corresponding radial groove. The locking plate can move radially into the lower wide cavity of the locking groove to achieve locking or move out of the lower wide cavity of the locking groove to achieve unlocking.

6. The ceramic dry sandpaper impact resistance testing system according to claim 5, characterized in that, The number of hammer pressure plates is equal to the number of ceramic abrasive protrusions. A circumferential adjustment assembly allows the hammer pressure plates to switch between two hammer pressure positions: one with the corresponding ceramic abrasive protrusion and the other in the gap area between two adjacent ceramic abrasive protrusions. The circumferential adjustment assembly includes an adjustment motor, a gear, and a pressure plate. The adjustment motor is embedded in the drop hammer cylinder, and a gear is installed at the output end of the adjustment motor. An annular groove is formed on the outer periphery of the pressure plate, and an incomplete tooth groove that mates with the gear is formed in the annular groove. A through hole is formed along the axial direction of the pressure plate to facilitate the passage of the hammer rod. The cross-section of the hammer rod is rectangular or circular.

7. The ceramic dry sandpaper impact resistance testing system according to claim 6, characterized in that, The side wall of the drop hammer cylinder is provided with a strip-shaped hole to facilitate the vertical displacement of the height adjustment plate. The drop hammer cylinder is provided with a support protrusion near the bottom opening, which cooperates with the annular rotating groove in the pressure plate. The outer diameter of the carrier plate is matched with the inner diameter of the drop hammer cylinder. The outer edge of the carrier plate is provided with a clearance notch to avoid the adjustment motor.

8. A method for testing the impact resistance of ceramic dry sandpaper, implemented based on the ceramic dry sandpaper impact resistance testing system described in claim 7, characterized in that, Includes the following steps: S1. When performing single-sided impact resistance test, adjust the fixed mounting plate and the moving mounting plate of the double-sided sandpaper clamping assembly to the horizontal unfolded state, lay the double-sided sandpaper to be tested flat on the fixed mounting plate and the moving mounting plate, and make the ceramic abrasive protrusion face upwards. Use the ring suction cup to adsorb and lock the two circular base papers. First, the sandpaper on the mounting plate is tested. The impact resistance testing component for sandpaper is pre-adjusted according to the requirements of single-sided impact resistance testing. The overall counterweight of the combined drop hammer and its hammer pressure release height are adjusted. The hammer pressure position of the hammer pressure plate is adjusted to face the ceramic abrasive protrusion using the circumferential adjustment component to perform the first hammer pressure. The combined drop hammer is reset using the height adjustment and reset component. The hammer pressure position of the hammer pressure plate is adjusted to face the gap area between two adjacent ceramic abrasive protrusions using the circumferential adjustment component to perform the second hammer pressure. Then, the horizontal flipping motor drives the fixed mounting plate and the moving mounting plate to flip and change positions, and the sandpaper on the moving mounting plate is inspected; S2. When performing double-sided impact resistance testing, adjust the fixed mounting plate and moving mounting plate of the double-sided sandpaper clamping assembly to a horizontally unfolded state. Tear the double-sided sandpaper to be tested along the tear line, lay one of the circular base papers flat on the fixed mounting plate with the ceramic abrasive protrusions facing down, and use the annular suction cup to adsorb and lock the circular base paper. Then, attach the other circular base paper to the locked circular base paper by adhesive, ensuring that the chip removal holes are connected one by one. The vertical flipping motor of the double-sided sandpaper clamping assembly drives the fixed mounting plate to flip and press it onto the other circular base paper via the belt drive, and use the annular suction cup to adsorb and lock the circular base paper. The sandpaper impact resistance testing component is designed to meet the requirements of double-sided impact resistance testing. It pre-adjusts the overall weight of the combined drop hammer and its hammer release height. The circumferential adjustment component adjusts the hammer pressure plate to face the ceramic abrasive protrusions for the third hammer press. The height reset component resets the combined drop hammer, and the circumferential adjustment component adjusts the hammer pressure plate to face the gap between two adjacent ceramic abrasive protrusions for the fourth hammer press. S3. If the double-sided sandpaper does not show obvious damage after four hammering tests, the impact resistance test is deemed to have passed; otherwise, the impact resistance test is deemed to have failed.

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