Flexible self-adaptive substrate edge grinding machine of printing head

Abstract

The invention belongs to the technical field of substrate edge grinding, and particularly relates to a flexible self-adaptive substrate edge grinding machine of a printing head. Comprising a workbench, an XYZ three-axis module, a rotating shaft R, a plate conveying belt line, a primary alignment mechanism which is arranged on the plate conveying belt line and aligns an A side, a secondary alignment mechanism which aligns a B side and aligns twice so as to eliminate an error that the two sides of a substrate are not parallel, namely the widths of the two ends are not consistent, and a grinding wheel mechanism (double grinding wheels, a diamond grinding sheet and a spraying assembly). According to the automatic edge grinding device, manual operation is converted into automation, a base plate is positioned by a first push plate through conveying of a first belt, then the base plate is subjected to 45-degree edge grinding of 0.10 + / -0.05 mm through combination of an X / Y / Z three-axis module and an organ suction nozzle and action programming, the base plate is put back to the first belt after edge grinding is completed, and the base plate is subjected to automatic edge grinding. Automatic feeding is carried out while the edged substrates are conveyed out of the working range through the first belt, and no manual operation is needed to directly participate in edging operation in the whole process.

Description

Technical Field

[0001] The invention belongs to the technical field of substrate edge grinding, in particular to a flexible self-adaptive substrate edge grinding machine for a print head. Background Art

[0002] A thermal print head is a key component of a printing device. It uses thermal technology to convert electrical energy into thermal energy to produce images or text on thermal paper. The substrate is a key basic component for making a thermal print head. In the process of making a thermal print head, the substrate serves as a core carrier, supporting the heating element, electrode layer, protective layer and other necessary electronic components. However, after cutting, the edges of existing substrates may have cracks, flash and burrs. These cracks will reduce the mechanical strength of the substrate after processing and cause damage to the subsequent silk screen printing process. Therefore, these cracks, flash and burrs are eliminated by grinding the substrate edges.

[0003] In the prior art, the substrate is manually held and ground on a grinding machine to perform manual grinding on the substrate edge.

[0004] The above scheme still has some shortcomings in actual use. Since manual work has high technical requirements and the technical levels of the workers are different, it is difficult to ensure the consistency of the accuracy and dimensional tolerance of all substrates after edge grinding. At the same time, long-term repetitive grinding work can easily cause physical fatigue of the workers. At this time, the workers need to stop working and rest, which reduces the efficiency of edge grinding.

[0005] To this end, the present invention provides a flexible adaptive substrate edge grinding machine for a print head. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve the technical problem is: the flexible adaptive substrate edge grinding machine of the print head described in the present invention comprises a workbench, and a waterproof cover 1 is fixedly connected to the top of the workbench; A plate conveying belt line is arranged on the top of the workbench, and the plate conveying belt line includes a base 1, and two belts 1 are arranged on the base 1 for transmission, and the substrate is transported by the displacement of the belts 1; The top of the workbench is provided with an X / Y / Z three-axis module, the X / Y / Z three-axis module includes a rotating shaft R, a suction device is provided on one side of the rotating shaft R, the suction device includes a plurality of accordion nozzles, the accordion nozzles are caused to suction the substrate by the movement of the rotating shaft R, and the accordion nozzles are driven to move by the X / Y / Z three-axis module, so that the substrate on the accordion nozzles is transported to the edge grinding area; The top of the workbench is fixedly connected with a second waterproof cover, and a spray assembly is arranged in the second waterproof cover, so that the grinding wheel is wetted by the spray assembly, and the debris on the grinding wheel is washed down by the impact of the water flow, and the debris deposited on the bottom of the second waterproof cover is cleaned; A grinding wheel mechanism is arranged on the top of the workbench, and the grinding wheel mechanism includes a base three, and grinding wheels are symmetrically arranged on the base three, and the substrate is edged by the grinding wheels; The top of the workbench is provided with a secondary alignment mechanism, which includes a base four, a limit plate two is fixedly provided on one side of the top of the base four, and a push plate two is fixedly provided on the other side of the top of the base four, and the push plate two is pushed by the cylinder to move, so that the push plate two contacts the substrate on the top of the base four, so that the other end of the substrate is contacted by the limit plate two, thereby completing the positioning of the substrate; A human-machine interaction device is arranged on one side of the top of the workbench, and the human-machine interaction device is used to observe the working status of the substrate edge grinding.

[0008] Preferably, limit block fixing blocks are symmetrically arranged on both sides of the waterproof cover 2, an accordion cover slide rod is fixedly connected between the two limit block fixing blocks on each side, each accordion cover slide rod is slidably connected with a guide sleeve, the tops of the two guide sleeves are fixedly connected with a guide plate 2, and one side of the guide plate 2 is fixedly connected with a foldable accordion cover.

[0009] Preferably, the plate transport belt line further comprises a symmetrically arranged rotating shaft 1, two rotating shafts 1 are respectively rotated at two ends of the top of the base 1, two belts 1 are respectively transmitted between the two ends of the two rotating shafts 1, one end of one rotating shaft 1 is fixedly connected to a motor 1, a stop plate 1 is rotatably arranged on the top of the base 1, and a stop plate 2 is rotatably arranged on one end of the top of the base 1; The plate transport belt line is provided with a primary alignment mechanism, which includes a push plate 1, which is fixedly arranged on the top of a base 1, and a limiting plate 1 is rotatably arranged on the other end of the top of the base 1.

[0010] Preferably, the X / Y / Z three-axis module also includes a base two, the base two is fixed on the top of the workbench, an electric guide rail two is fixedly arranged on the top of the base two, an electric guide rail three is fixedly arranged on the electric guide rail two, and the rotating axis R is slidably arranged on the electric guide rail three.

[0011] Preferably, the adsorption device also includes a fixed plate, which is fixedly arranged on the rotating shaft R, the top of the fixed plate is rotatably connected to a second rotating shaft, the surface of the second rotating shaft is fixedly connected to a rotating plate, one end of the second rotating shaft is fixedly connected to a second motor, and a plurality of accordion suction nozzles are fixed on the bottom of the rotating plate.

[0012] Preferably, the spray assembly includes a displacement groove 1, which is opened at one end of the waterproof cover 2, a rack 1 is slidably connected to the bottom of the displacement groove 1, a scraper 1 is fixedly connected to one end of the rack 1, a rack 2 is slidably connected to the top of the displacement groove 1, a scraper 2 is fixedly connected to one end of the rack 2, an electric telescopic rod is fixedly connected to one end of the displacement groove 1, a guide gear is rotatably connected to the middle of the displacement groove 1, and the rack 1 and rack 2 are both meshed with the guide gear.

[0013] Preferably, a water inlet is provided on one side of the waterproof cover 2, and displacement grooves 2 are provided on both sides of the waterproof cover 2, each displacement groove 2 is rotatably connected with a screw rod, a displacement block 1 is threadedly connected to the surface of the screw rod, one end of the displacement block 1 is fixedly connected to a scraper 3, a card slot 1 is provided on one side of the scraper 3, a belt 2 is transmission-connected between the two screw rods, one end of a screw rod is fixedly connected to a motor 3, one side of a displacement block 1 in one end of a displacement groove 2 is fixedly connected to a contact 1, and the other end surface is fixedly connected to a contact 2; A guide groove is provided at the bottom of the waterproof cover 2, a telescopic groove is provided on one side of the base 3, a clamping groove 2 is symmetrically provided on one side of the base 3, a scraper 4 is slidably connected in the guide groove, a return spring is fixedly connected between the bottom of the telescopic groove and the scraper 4, clamping plates are fixedly connected at both ends of the scraper 4, and a clamping block is symmetrically fixedly arranged on one side of the scraper 4.

[0014] Preferably, a displacement groove three is provided at the other end of the waterproof cover two, a rotating rod is rotatably connected in the displacement groove three, thread grooves are symmetrically provided on the surface of the rotating rod, a displacement block two is threadedly connected on the surface of each thread groove, a scraper five is fixedly connected at one end of each displacement block two, and a motor four is fixedly connected at one end of the rotating rod.

[0015] Preferably, a water outlet pipe is fixedly connected to the bottom of the second waterproof cover, a bamboo tube is fixedly connected inside the water outlet pipe, one end of the bamboo tube is fixedly connected to a water supply pump, one side of the water outlet pipe is fixedly connected to a fixing seat and a water inlet pipe, the other end of the stop plate one is fixedly connected to a processing box, and the processing box is fixed to the bottom of the workbench.

[0016] Preferably, the grinding wheel mechanism also includes a water seepage protection cover, which is symmetrically arranged, one water seepage protection cover is fixed to the top of the base three, and the other water seepage protection cover is fixed to the top of the workbench, and drainage holes are arranged in the two water seepage protection covers, and a rotating shaft three is rotatably connected between adjacent drainage holes on each water seepage protection cover, and a wedge-shaped belt is transmission-connected between the two rotating shafts three, and two grinding wheels are respectively fixed to the two ends of a rotating shaft three located at the top of the base three, and one end of the other water seepage protection cover is fixedly connected to a motor six, and both ends of the water seepage protection cover are fixedly connected to water outlets, and one end of each water outlet is fixedly connected to a water spray pipe.

[0017] The beneficial effects of the present invention are as follows: 1. The present invention pushes the push plate 2 by the cylinder so that the substrate is clamped by the push plate 2 and the limit plate 2. At this time, the B side of the substrate is parallel to the limit plate 2, and the positioning of the B side of the substrate is completed. Then, the substrate is aligned for the second time to prevent the problem of incomplete grinding due to the side of the cut substrate not being vertical, resulting in the B side of the substrate not being completely parallel to the grinding wheel when grinding both sides of the B side, thereby further improving the grinding accuracy.

[0018] 2. The accordion suction nozzle of the present invention has a certain flexibility. After sucking the substrate, when there is a slight non-parallelism between the substrate and the end face of the grinding wheel, the flatness error of the substrate itself and the end face of the grinding wheel itself, or the various cumulative errors caused by the installation of the workpiece, the substrate and the end face of the grinding wheel are not ideal parallel surfaces, as long as they are within 0.3mm, during the grinding process, due to the elasticity of the accordion suction nozzle, the two ends of the substrate can be tightly pressed against the grinding wheel for grinding, and the substrate and the end face of the grinding wheel are artificially over-pressed by 0.5-0.8mm. When the dimensional error caused by parallelism, etc. is within 0.3mm, the accordion suction nozzle can automatically eliminate the error by slightly adaptively deforming the accordion suction nozzle through the increase in the grinding amount, thereby improving the grinding accuracy of the substrate and ensuring the quality of the thermal print head made using this substrate.

[0019] 3. The present invention regularly cleans the debris in the waterproof cover to prevent excessive accumulation of debris, which may cause the debris to be sucked away by the water spray pipe when absorbing water, and sprayed onto the grinding wheel through the water spray pipe, causing the debris to collide with the grinding wheel and adhere to its surface, resulting in reduced precision of the grinding end of the substrate when the grinding wheel grinds the substrate. The surface of the grinding wheel is relatively clean during grinding, further improving the precision of the grinding wheel after grinding the substrate.

[0020] 4. The present invention realizes the transformation from manual operation to automation. The substrate is positioned by push plate 1 through the transmission of belt 1, and then the substrate is subjected to forty-five degree edge grinding of 0.10±0.05mm through the combination of X / Y / Z three-axis module and accordion suction nozzle and action programming. After the edge grinding of the substrate is completed, it is put back on belt 1, and the substrate with completed edge grinding is transported out of the working range by belt 1 while automatically loading. The whole process does not require direct human participation in the edge grinding operation, which significantly shortens the operation time, improves production efficiency, and greatly reduces the labor intensity of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1 It is a schematic elevation diagram of the overall device of the present invention; Figure 2 It is a rear view schematic diagram of the overall device of the present invention; Figure 3It is a top view schematic diagram of the overall device of the present invention; Figure 4 It is a partial cross-sectional schematic diagram of the overall device of the present invention; Figure 5 It is a schematic diagram of the plate transport belt line of the present invention; Figure 6 This is a schematic diagram of the X / Y / Z three-axis module of the present invention; Figure 7 It is a schematic diagram of the adsorption device of the present invention; Figure 8 This is a schematic diagram of the relationship between the waterproof cover 2 and the grinding wheel position of the present invention; Fig. 9 This is a schematic diagram of the position relationship between the workbench and the waterproof cover of the present invention; Fig.10 This is a schematic diagram of the position relationship between the water outlet and the water spray pipe of the present invention; Fig.11 This is a schematic diagram of the secondary alignment mechanism of the present invention; Fig.12 This is a schematic diagram of the position relationship between the water outlet pipe and the water supply pump of the present invention; Fig.13 This is a schematic diagram of the positional relationship between the bamboo tube and the guide groove of the present invention; Fig.14 This is a schematic diagram of the positional relationship between the rack 1 and the guide gear of the present invention; Fig.15 This is a schematic diagram of the position relationship between the scraper 3 and the slot 1 of the present invention; Fig.16 This is a schematic diagram of the relationship between the guide groove and the four positions of the scraper of the present invention; Fig.17 This is a schematic diagram of the position relationship between the displacement block 2 and the scraper 5 of the present invention; Fig.18 This is a schematic diagram of the position relationship between the water outlet pipe and the bamboo tube of the present invention; Fig.19 It is a schematic diagram of the position relationship between the limit block and the accordion cover sliding rod of the present invention.

[0023] Reference numerals: 1. workbench; 21. Waterproof cover 1; 31. Base 1; 32. Rotating shaft 1; 33. Belt 1; 34. Motor 1; 35. Stop plate 1; 36. Push plate 1; 37. Stop plate 2; 38. Limit plate 1; 41. Base 2; 42. Electric guide rail 2; 43. Electric guide rail 3; 44. Rotation axis R; 51. Fixed plate; 52. Rotating shaft 2; 53. Rotating plate; 54. Motor 2; 55. Organ nozzle; 61. Waterproof cover 2; 62. Displacement slot 1; 63. Rack 1; 64. Scraper 1; 65. Rack 2; 66. Scraper 2; 67. Guide gear; 68. Electric telescopic rod; 69. Water inlet; 610. Displacement slot 2; 611. Screw rod; 612. Displacement block 1; 613. Scraper 3; 614. Slot 1; 615. Belt 2; 616. Motor 3; 617. Contact 1; 618. Contact 2; 619. Guide slot; 620. Telescopic slot; 621. Slot 2; 622 , scraper four; 623, return spring; 624, card plate; 625, card block; 626, displacement slot three; 627, rotating rod; 628, threaded groove; 629, displacement block two; 630, scraper five; 631, motor four; 632, water outlet pipe; 633, bamboo tube; 634, water supply pump; 635, fixed seat and water inlet pipe; 636, treatment box; 637, limit block; 638, accordion cover slide rod; 639, guide sleeve; 640, guide plate two; 641, foldable accordion cover; 71. Base three; 72. Water seepage protection sleeve; 73. Rotating shaft three; 74. Wedge belt; 75. Motor six; 76. Grinding wheel; 77. Water outlet; 78. Water spray pipe; 81. Base 4; 82. Limiting plate 2; 83. Push plate 2; 9. Human-computer interaction equipment. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0025] Embodiment 1 like Figures 1 to 19 As shown, a flexible adaptive substrate edge grinding machine for a print head according to an embodiment of the present invention comprises a workbench 1, and a waterproof cover 21 is fixedly connected to the top of the workbench 1; A plate conveying belt line is arranged on the top of the workbench 1, and the plate conveying belt line includes a base 31, and two belts 33 are arranged on the base 31 for transmission, and the substrate is transported by the displacement of the belts 33; An X / Y / Z three-axis module is arranged on the top of the workbench 1. The X / Y / Z three-axis module includes a rotating shaft R44. A suction device is arranged on one side of the rotating shaft R44. The suction device includes a plurality of accordion suction nozzles 55. The accordion suction nozzles 55 are caused to suction the substrate by the movement of the rotating shaft R44. The accordion suction nozzles 55 are driven to move by the X / Y / Z three-axis module, so that the substrate on the accordion suction nozzles 55 is transported to the edge grinding area. A second waterproof cover 61 is fixedly connected to the top of the workbench 1. A spray assembly is arranged inside the second waterproof cover 61. The spray assembly wets the grinding wheel and washes away the debris on the grinding wheel by the impact of the water flow. At the same time, the debris deposited at the bottom of the second waterproof cover 61 is cleaned. A grinding wheel mechanism is arranged on the top of the workbench 1, and the grinding wheel mechanism includes a base 3 71, and a grinding wheel 76 is symmetrically arranged on the base 3 71, and the substrate is edged by the grinding wheel 76; A secondary alignment mechanism is provided on the top of the workbench 1, and the secondary alignment mechanism includes a base 4 81, a limit plate 2 82 is fixedly provided on one side of the top of the base 4 81, and a push plate 2 83 is fixedly provided on the other side of the top of the base 4 81. The push plate 2 83 is pushed by the cylinder to move, so that the push plate 2 83 contacts the substrate on the top of the base 4 81, so that the other end of the substrate is contacted by the limit plate 2 82, thereby completing the positioning of the substrate; A human-machine interaction device 9 is arranged on one side of the top of the workbench 1 , and the human-machine interaction device 9 is used to observe the working status of the substrate edge grinding.

[0026] Specifically, the above scheme still has some shortcomings in actual use. Since manual work has high technical requirements and the technical levels of the workers are different, it is difficult to ensure the consistency of the accuracy and dimensional tolerance of all substrates after edge grinding. At the same time, long-term repetitive grinding work can easily cause physical fatigue to the workers. At this time, the workers need to stop working and rest, which reduces the efficiency of edge grinding.

[0027] Therefore, the present invention solves this problem by setting a corresponding structure. The device includes a workbench 1, an X\Y\Z three-axis module and a rotating shaft R44, a plate conveying belt line, a primary alignment mechanism (installed on the plate conveying belt line to align the A side), a secondary alignment mechanism (aligning the B side, the alignment is divided into two times to eliminate the non-parallel error of the two sides of the substrate itself, that is, the width of the two ends is inconsistent), and a grinding wheel mechanism (double grinding wheels 76, diamond grinding discs and spray components); First, place the substrate on the base 31, and move the belt 33 to move the substrate toward the other end of the conveying belt line. When the substrate moves to a certain distance, the accordion suction nozzle 55 on the suction device suction device suctions the substrate through the movement of the X / Y / Z three-axis module, and the substrate is transported to the edge grinding area with the movement of the X / Y / Z three-axis module. The substrate is tilted by the suction component, and the edge of the substrate is rotated forty-five degrees and then contacts the rotating grinding wheel 76. The grinding wheel 76 is equipped with a diamond grinding wheel, and then the A side of the substrate is ground. After the grinding is completed, the substrate is reset, and then rotated in the opposite direction forty-five degrees, and the same grinding operation is performed. At this time, the grinding of the upper and lower sides of the A side of the substrate is completed, and then the substrate is sucked by the accordion suction nozzle 55, and the substrate is placed on the base four 81 through the X / Y / Z three-axis module. At this time, the accordion suction nozzle 55 no longer suctions the substrate; The length of the second limiting plate 82 is longer than the second pushing plate 83. The second pushing plate 83 is pushed by the cylinder so that the substrate is clamped by the second pushing plate 83 and the second limiting plate 82. At this time, the B side of the substrate is parallel to the second limiting plate 82, completing the positioning of the B side of the substrate, and then completing the secondary alignment; Then, the upper and lower sides of the B side of the substrate are ground through the above operation. After completion, the substrate is placed on the belt 1 33 through the movement of the accordion nozzle 55 and the X / Y / Z three-axis module. At this time, the belt 1 33 is moved. The substrate reaches the other end of the conveying belt line through the movement of the belt 1 33 and is then transmitted out. Then, the new substrate is transported to one end of the belt 1 33. During the edge grinding of the substrate, various data of the grinding process can be displayed in real time through the human-computer interaction device 9, and the grinding parameters can be adjusted through the human-computer interaction device 9 to ensure processing accuracy and efficiency. After grinding for a period of time, the machine is stopped and the debris in the waterproof cover 2 61 is cleaned by the spray assembly. After cleaning, the edge grinding of the substrate is continued.

[0028] The present invention pushes the push plate 83 by the cylinder so that the substrate is clamped by the push plate 83 and the limit plate 82. At this time, the B side of the substrate is parallel to the limit plate 82, and the positioning of the B side of the substrate is completed. Then, the substrate is aligned for the second time to prevent the problem of incomplete grinding caused by the side of the cut substrate not being vertical, resulting in the side B of the substrate not being completely parallel to the grinding wheel 76 when grinding both sides of the side B, thereby further improving the grinding accuracy.

[0029] like Fig.19 As shown, in this embodiment, both sides of the waterproof cover 2 61 are symmetrically provided with limit blocks 637, an accordion cover slide bar 638 is fixedly connected between the two limit blocks 637 on each side, a guide sleeve 639 is slidably connected to each accordion cover slide bar 638, a guide plate 2 640 is fixedly connected to the top of the two guide sleeves 639, and a foldable accordion cover 641 is fixedly connected to one side of the guide plate 2 640. Specifically, since the guide sleeve 639 is configured to move synchronously with the slider 1 on the electric guide rail 2 42, when the slider 1 on the electric guide rail 2 42 is displaced, the guide sleeve 639 also moves synchronously. Under the limiting action of the accordion cover slide bar 638, the guide plate 2 640 can only perform horizontal linear motion, thereby folding and stretching the foldable accordion cover 641, and then covering the top of the waterproof cover 2 61, to prevent the water on the grinding wheel 76 from splashing out of the waterproof cover 2 61 as the grinding wheel 76 rotates when the substrate is edged.

[0030] Embodiment 2 like Figures 2 to 19 As shown, compared with Example 1, another implementation of the present invention is: like Figures 2 to 5As shown, the plate transport belt line of this embodiment also includes a symmetrically arranged rotating shaft 1 32, two rotating shafts 1 32 are respectively rotated at the two ends of the top of the base 1 31, two belts 1 33 are respectively transmitted between the two ends of the two rotating shafts 1 32, one end of one rotating shaft 1 32 is fixedly connected to a motor 1 34, the top of the base 1 31 is rotatably provided with a stop plate 1 35, and one end of the top of the base 1 31 is rotatably provided with a stop plate 2 37; A primary alignment mechanism is arranged on the plate transport belt line, and the primary alignment mechanism comprises a push plate 36, which is fixedly arranged on the top of the base 31, and a limit plate 38 is rotatably arranged on the other end of the top of the base 31.

[0031] Specifically, a detection photoelectric device is symmetrically arranged on the top of the base 31, and a rotating device is symmetrically arranged on the top of the base 31, one rotating device is connected to the stop plate 35, and the other rotating device is connected to the stop plate 2 37, one side of the push plate 36 is connected to the output end of the cylinder, and one side of the limit plate 38 is connected to the output end of another cylinder. The length of the limit plate 38 is longer than that of the push plate 36, and the output end of the motor 34 is fixed to a rotating shaft 32. Initially, the stop plate 35 and the stop plate 2 37 are both vertical to the top of the base 31; like Figure 5 When the substrate is placed on the top of the base 31 away from the end of the motor 34, the bottom of the substrate contacts the two belts 33. By starting the motor 34, the belt 33 moves toward the end close to the motor 34, thereby driving the substrate to move synchronously until the substrate contacts the stop plate 35. At this time, the motor 34 stops rotating, thereby completing the loading of the substrate. Then, the stop plate 1 35 is retracted to the top of the base 1 31 by a rotating device, so that the stop plate 1 35 no longer contacts the substrate. At this time, the motor 1 34 is started to move the substrate under the belt 1 33 until the substrate is blocked by the stop plate 2 37. At the same time, the next substrate is placed on the belt 1 33. When the substrate is blocked by the stop plate 2 37, the stop plate 1 35 is reset to block the next substrate. At this time, the motor 34 is turned off, and then the cylinders on the push plate 36 and the limit plate 38 are started, so that the push plate 36 pushes one side of the substrate, and the limit plate 38 pushes the other side of the substrate, until the output end of the cylinder is extended to the maximum distance, and the substrate is abutted between the push plate 36 and the limit plate 38, so that the A side of the substrate is parallel to the side surface of the limit plate 38, and the substrate has completed the first positioning; When the substrate after edge grinding is placed on the belt 1 33, the stop plate 2 37 is retracted to the top of the base 1 31 through another rotating device. At this time, the motor 1 34 is started to make the belt 1 33 convey the polished substrate. At the same time, the above operation is repeated to prepare for the next edge grinding.

[0032] like Figures 2 to 4 and Figure 6 As shown, the X / Y / Z three-axis module of this embodiment also includes a base 2 41, which is fixed on the top of the workbench 1, an electric guide rail 2 42 is fixedly arranged on the top of the base 41, an electric guide rail 3 43 is fixedly arranged on the electric guide rail 2 42, and a rotating shaft R44 is slidably arranged on the electric guide rail 3 43.

[0033] Specifically, a slider 1 is provided on the electric guide rail 2 42, one side of the electric guide rail 3 43 is fixed on the slider 1, a slider 2 is provided on the slider electric guide rail 3 43, one side of the rotating shaft R44 is fixed on the slider 2, a slider 3 is provided on the rotating shaft R44, and one side of the fixed plate 51 slides on the slider 3; After the substrate completes the first positioning, the electric guide rail three 43 is moved by the displacement of the slider one on the electric guide rail two 42, the rotation axis R44 is moved by the displacement of the slider two on the electric guide rail three 43, and the slider three is moved in the three-axis direction by the movement of the slider three on the rotation axis R44.

[0034] like Figures 2 to 4 , Figure 6 and Figure 7 As shown, the adsorption device of this embodiment also includes a fixed plate 51, which is fixedly arranged on the rotating shaft R44. The top of the fixed plate 51 is rotatably connected to a rotating shaft 52, the surface of the rotating shaft 52 is fixedly connected to a rotating plate 53, one end of the rotating shaft 52 is fixedly connected to a motor 54, and a plurality of accordion suction nozzles 55 are fixed on the bottom of the rotating plate 53.

[0035] Specifically, the accordion suction nozzle 55 is made of rubber and has a certain degree of flexibility. After the substrate is sucked, when there is a slight non-parallelism between the substrate and the end face of the grinding wheel 76, the flatness error of the substrate itself and the end face of the grinding wheel 76 itself, or the installation of the workpiece, the various cumulative errors caused by the substrate and the end face of the grinding wheel 76 are not ideal parallel surfaces, as long as they are within 0.3mm, during the grinding process, due to the elasticity of the accordion suction nozzle 55, the substrate and the end face of the grinding wheel 76 can be artificially over-pressed by 0.5-0.8mm. When the dimensional error caused by parallelism is within 0.3mm, the accordion suction nozzle 55 can automatically eliminate the error by slightly adaptively deforming the accordion suction nozzle 55 through the increase of the grinding amount, thereby improving the grinding accuracy of the substrate and ensuring the quality of the thermal print head made using this substrate. When the slider three on the rotating shaft R44 moves, the adsorption device moves synchronously with the slider three on the rotating shaft R44; After the substrate is positioned for the first time, the accordion nozzle 55 is positioned above the substrate through the movement of the X / Y / Z three-axis module. At this time, the accordion nozzle 55 adsorbs the substrate, and then the substrate is placed in the edge grinding area through the movement of the X / Y / Z three-axis module. At this time, the second motor 54 is started to make the rotating plate 53 rotate along with the second rotating shaft 52, so that the accordion nozzle 55 drives the substrate to rotate synchronously, until the side A of the substrate rotates forty-five degrees, and then the second motor 54 is turned off; After the grinding is completed, the substrate is no longer ground by the movement of the X / Y / Z three-axis module, and the second motor 54 is started to rotate in the opposite direction to reset the substrate. After the substrate is horizontal, the reverse rotation is continued to make the substrate beveled 45 degrees in the opposite direction relative to the horizontal direction. At this time, the second motor 54 is turned off. Through the above operation, the other side of the side A of the substrate is ground, thereby completing the grinding of the side A of the substrate. After the substrate is aligned for the second time, the two sides of the B side of the substrate are ground through the above operation, thereby completing the edge grinding of the B side of the substrate.

[0036] like Figure 2 , Figure 3 , Figure 8 , Fig.11 and Fig.14 As shown, the spray assembly of this embodiment includes a displacement groove 62, which is opened at one end of the waterproof cover 61, a rack 63 is slidably connected to the bottom of the displacement groove 62, one end of the rack 63 is fixedly connected to a scraper 64, a rack 65 is slidably connected to the top of the displacement groove 62, one end of the rack 65 is fixedly connected to a scraper 66, one end of the displacement groove 62 is fixedly connected to an electric telescopic rod 68, and a guide gear 67 is rotatably connected to the middle of the displacement groove 62, and the rack 63 and the rack 65 are both meshed with the guide gear 67.

[0037] Specifically, after grinding the edge of the substrate for a period of time, debris is deposited at the bottom of the waterproof cover 61. The machine is stopped at this time, and then the electric telescopic rod 68 is started to extend the electric telescopic rod 68. The rack 2 65 is moved synchronously through the output end of the electric telescopic rod 68, thereby driving the scraper 2 66 to move away from the middle of the waterproof cover 61. While the rack 2 65 moves, the guide gear 67 displaces the rack 1 63, so that the rack 1 63 drives the scraper 1 64 to move away from the scraper 2 66. Through the movement of the scrapers 1 64 and 66, the debris within the moving range of the scrapers 1 64 and 66 is pushed to both sides of the waterproof cover 61.

[0038] like Figure 8 , Fig.12 , Fig.13 , Fig.15 and Fig.16As shown, a water inlet 69 is provided on one side of the waterproof cover 61 of this embodiment, and displacement grooves 610 are provided on both sides of the waterproof cover 61. A screw rod 611 is rotatably connected in each displacement groove 610. A displacement block 612 is threadedly connected on the surface of the screw rod 611. A scraper 3 613 is fixedly connected to one end of the displacement block 612. A slot 614 is provided on one side of the scraper 3 613. A belt 615 is transmission-connected between the two screw rods 611. A motor 3 616 is fixedly connected to one end of a screw rod 611. A contact 617 is fixedly connected to one side of the displacement block 612 in one end of the displacement groove 610, and a contact 2 618 is fixedly connected to the surface of the other end. A guide groove 619 is provided at the bottom of the waterproof cover 2 61, a telescopic groove 620 is provided at one side of the base 3 71, a clamping groove 2 621 is symmetrically provided at one side of the base 3 71, a scraper 4 622 is slidably connected in the guide groove 619, a return spring 623 is fixedly connected between the bottom of the telescopic groove 620 and the scraper 4 622, clamping plates 624 are fixedly connected at both ends of the scraper 4 622, and a clamping block 625 is symmetrically fixedly provided on one side of the scraper 4 622.

[0039] Specifically, when the debris is pushed to both sides of the waterproof cover 2 61, one side of the scraper 2 66 contacts one end of the scraper 3 613 to form a wall, and then the motor 3 616 is started, and a screw rod 611 is driven to rotate through the output end of the motor 3 616, and the other screw rod 611 is driven to rotate synchronously under the transmission action of the belt 2 615, and the displacement block 1 612 is limited by the displacement groove 2 610, so that the scraper 3 613 moves toward the direction close to the motor 3 616; During this process, motor three 616 pushes the debris within its moving range to move synchronously until the clamping plate 624 is engaged with the clamping slot one 614. At this time, as motor three 616 moves, scraper four 622 moves synchronously with motor three 616, and only moves in a straight line under the action of guide groove 619. When scraper four 622 moves, the return spring 623 will elastically stretch. At the same time, scraper four 622 will push the guide groove 619 and the debris within its moving range until it moves to the other end of the screw rod 611. At this time, the screw rod 611 no longer rotates, and contact one 617 conflicts with contact two 618.

[0040] like Fig.13 and Fig.17 As shown, the other end of the waterproof cover 2 61 of this embodiment is provided with a displacement groove 3 626, and a rotating rod 627 is rotatably connected in the displacement groove 3 626. The surface of the rotating rod 627 is symmetrically provided with thread grooves 628, and the surface of each thread groove 628 is threadedly connected with a displacement block 2 629, one end of each displacement block 2 629 is fixedly connected with a scraper 5 630, and one end of the rotating rod 627 is fixedly connected with a motor 4 631.

[0041] Specifically, when contact one 617 conflicts with contact two 618, motor four 631 is started. Since the threaded groove 628 and displacement block two 629 are symmetrically arranged, when the rotating rod 627 rotates, the displacement block two 629 only performs horizontal linear motion under the limitation of displacement groove three 626, so that the two scrapers five 630 move relative to each other. Since scraper four 622 and the two scrapers three 613 are still in a clamping state when they stop moving, and one side of them conflicts with one end of scraper five 630 at this time, thereby forming a wall, so that scraper five 630 pushes debris to the middle of waterproof cover two 61 during the process of moving toward the middle of the rotating rod 627.

[0042] like Figure 4 and 18 As shown, the bottom of the waterproof cover 61 of this embodiment is fixedly connected with a water outlet pipe 632, a bamboo tube 633 is fixedly connected inside the water outlet pipe 632, one end of the bamboo tube 633 is fixedly connected with a water supply pump 634, one side of the water outlet pipe 632 is fixedly connected with a fixing seat and a water inlet pipe 635, the other end of the stop plate 35 is fixedly connected with a processing box 636, and the processing box 636 is fixed at the bottom of the workbench 1.

[0043] Specifically, when the electric telescopic rod 68 is started, the water supply pump 634 is started synchronously, so that the water and debris in the waterproof cover 61 are discharged through the bamboo tube 633, thereby speeding up the speed of discharging the water and debris in the waterproof cover 61, and also preventing the problem of excessive accumulation of debris leading to blockage of the water outlet pipe 632. The discharged water and debris enter the treatment box 636 through the fixed seat and the water inlet pipe 635.

[0044] The present invention periodically cleans the debris in the waterproof cover 61 to prevent excessive accumulation of debris, which may cause the debris to be sucked away by the water spray pipe 78 when absorbing water, and sprayed onto the grinding wheel 76 through the water spray pipe 78, causing the debris to collide with the grinding wheel 76 and adhere to its surface, resulting in reduced accuracy of the grinding end of the substrate when the grinding wheel 76 grinds the substrate. The surface of the grinding wheel 76 is relatively clean during grinding, further improving the accuracy of the grinding wheel 76 after grinding the substrate.

[0045] like Figure 4 and Figures 8 to 10As shown, the grinding wheel mechanism of this embodiment also includes a water seepage protection sleeve 72, which is symmetrically arranged, one water seepage protection sleeve 72 is fixed to the top of the base three 71, and the other water seepage protection sleeve 72 is fixed to the top of the workbench 1, and drainage holes are arranged in the two water seepage protection sleeves 72, and a rotating shaft three 73 is rotatably connected between the adjacent drainage holes on each water seepage protection sleeve 72, and a wedge-shaped belt 74 is transmission-connected between the two rotating shafts three 73, and two grinding wheels 76 are respectively fixed to the two ends of a rotating shaft three 73 located on the top of the base three 71, and one end of the other water seepage protection sleeve 72 is fixedly connected to a motor six 75, and both ends of the water seepage protection sleeve 72 are fixedly connected to water outlets 77, and one end of each water outlet 77 is fixedly connected to a water spray pipe 78.

[0046] Specifically, a tightening device is provided on the rotating shaft 73. Through the rotation of the rotating shaft 73, the tightening device causes the grinding wheels 76 at both ends of the rotating shaft 73 to move toward the direction close to the middle of the rotating shaft 73. like Figure 8 When the substrate is clamped to the edge grinding area after the first positioning, the motor 6 75 is started, and the grinding wheel 76 is rotated through the wedge belt 74, so that the positioned side A of the substrate is fitted with the left grinding wheel 76, and then the left grinding wheel 76 grinds both sides of the side A of the substrate; When the substrate is clamped to the edge grinding area after the second alignment, the B side of the substrate is fitted with the grinding wheel 76 on the right side through the above operation, and then the grinding wheel 76 on the right side grinds both sides of the B side of the substrate.

[0047] During the rotation of the grinding wheel 76, the bottom of the water outlet 77 is located below the water level stored in the waterproof cover 61. The water in the waterproof cover 61 is absorbed through the water outlet 77 and transported to the grinding wheel 76 through the water spray pipe 78. While the grinding wheel 76 is cooled, the debris remaining on the grinding wheel 76 is washed away, further improving the grinding effect.

[0048] The present invention realizes the transformation from manual operation to automation. The substrate is positioned by the push plate 36 through the transmission of the belt 33. Then, the substrate is subjected to forty-five degree edge grinding of 0.10±0.05mm through the combination of the X / Y / Z three-axis module and the accordion suction nozzle 55 and the action programming. After the edge grinding of the substrate is completed, it is put back on the belt 33. The edge-grinded substrate is transported out of the working range by the belt 33 and loaded at the same time. The whole process does not require direct manual participation in the edge grinding operation, which significantly shortens the operation time, improves production efficiency, and greatly reduces the labor intensity of the staff.

[0049] Working principle: First, place the substrate on the base 31, and move the belt 33 to move the substrate toward the other end of the conveying belt line, thereby driving the substrate to move synchronously until the substrate contacts the stop plate 35, at which time the motor 34 stops rotating, thereby completing the loading of the substrate; Then, the stop plate 1 35 is retracted to the top of the base 1 31 by a rotating device, so that the stop plate 1 35 no longer contacts the substrate. At this time, the motor 1 34 is started to move the substrate under the belt 1 33 until the substrate is blocked by the stop plate 2 37. At the same time, the next substrate is placed on the belt 1 33. When the substrate is blocked by the stop plate 2 37, the stop plate 1 35 is reset to block the next substrate. At this time, the motor 34 is turned off, and then the cylinders on the push plate 36 and the limit plate 38 are started, so that the push plate 36 pushes one side of the substrate, and the limit plate 38 pushes the other side of the substrate, until the output end of the cylinder is extended to the maximum distance, and the substrate is abutted between the push plate 36 and the limit plate 38, so that the A side of the substrate is parallel to the side surface of the limit plate 38, and the substrate has completed the first positioning; At this time, the electric guide rail 3 43 is moved by the displacement of the slider 1 on the electric guide rail 2 42, and the rotation axis R44 is moved by the displacement of the slider 2 on the electric guide rail 3 43. The movement of the slider 3 on the rotation axis R44 drives the accordion nozzle 55 to adsorb the substrate, and the substrate is transported to the edge grinding area with the movement of the X / Y / Z three-axis module. When the slider 1 on the electric guide rail 2 42 moves, the guide sleeve 639 also moves synchronously. Under the limiting effect of the accordion cover slide bar 638, the guide plate 2 640 can only move horizontally and linearly, thereby folding and extending the foldable accordion cover 641. At this time, start the second motor 54 to make the rotating plate 53 rotate along with the second rotating shaft 52, and then make the accordion nozzle 55 drive the substrate to rotate synchronously, until the side A of the substrate rotates forty-five degrees, then turn off the second motor 54; At this time, the motor 6 75 is started, and the grinding wheel 76 is rotated through the wedge belt 74, so that the A side of the substrate is fitted with the grinding wheel 76 on the left side, and then the A side of the substrate is polished by the grinding wheel 76 on the left side; After the grinding is completed, the substrate is no longer ground by the movement of the X / Y / Z three-axis module, and the second motor 54 is started to rotate in the opposite direction to reset the substrate. After the substrate is horizontal, the reverse rotation is continued to make the substrate beveled 45 degrees in the opposite direction relative to the horizontal direction. At this time, the second motor 54 is turned off. Through the above operation, the other side of the side A of the substrate is ground, thereby completing the grinding of the side A of the substrate. Then, the substrate is sucked by the accordion nozzle 55, and the substrate is placed on the base 4 81 through the X / Y / Z three-axis module. At this time, the accordion nozzle 55 no longer sucks the substrate, and the push plate 2 83 is pushed by the cylinder so that the substrate is clamped by the push plate 2 83 and the limit plate 2 82. At this time, the B side of the substrate is parallel to the limit plate 2 82, and the positioning of the B side of the substrate is completed, thereby completing the secondary alignment; Then, the upper and lower sides of the B side of the substrate are ground through the above operation, and after completion, the substrate is placed on the belt 1 33 through the movement of the accordion nozzle 55 and the X / Y / Z three-axis module; At this time, the belt 1 33 is moved, and the substrate is transported to the other end of the conveying belt line through the movement of the belt 1 33, and then a new substrate is transported to one end of the belt 1 33; During the process of grinding the substrate, various data of the grinding process can be displayed in real time through the human-machine interaction device 9, and the grinding parameters can be adjusted through the human-machine interaction device 9 to ensure the processing accuracy and efficiency; After grinding for a period of time, the machine is stopped and the debris in the waterproof cover 61 is cleaned through the spray assembly. After cleaning, the water and debris are discharged into the processing box 636 through the bamboo tube 633 and the water supply pump 634, and then the substrate continues to be edged.

[0050] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A flexible and adaptive substrate edge grinding machine for a print head, characterized in that: It comprises a workbench (1), the top of which is fixedly connected to a waterproof cover (21); A plate transport belt line is arranged on the top of the workbench (1), and the plate transport belt line comprises a base (31). Two belts (33) are arranged on the base (31) for transmission, and the substrate is transported by the displacement of the belts (33); An X / Y / Z three-axis module is arranged on the top of the workbench (1), the X / Y / Z three-axis module includes a rotating shaft R (44), a suction device is arranged on one side of the rotating shaft R (44), the suction device includes a plurality of accordion suction nozzles (55), the accordion suction nozzles (55) are caused to suction the substrate by the movement of the rotating shaft R (44), and the accordion suction nozzles (55) are driven to move by the X / Y / Z three-axis module, so that the substrate on the accordion suction nozzles (55) is transported to the edge grinding area; The top of the workbench (1) is fixedly connected to a second waterproof cover (61), and a spray assembly is arranged inside the second waterproof cover (61). The spray assembly is used to wet the grinding wheel, and the debris on the grinding wheel is washed off by the impact of the water flow, and the debris deposited on the bottom of the second waterproof cover (61) is cleaned; A grinding wheel mechanism is arranged on the top of the workbench (1), the grinding wheel mechanism comprises a base three (71), and grinding wheels (76) are symmetrically arranged on the base three (71), and the substrate is edged by the grinding wheels (76); A secondary alignment mechanism is arranged on the top of the workbench (1), and the secondary alignment mechanism includes a base four (81), a limit plate two (82) is fixedly arranged on one side of the top of the base four (81), and a push plate two (83) is fixedly arranged on the other side of the top of the base four (81), and the push plate two (83) is pushed by the cylinder to move, so that the push plate two (83) contacts the substrate on the top of the base four (81), so that the other end of the substrate is contacted by the limit plate two (82), thereby completing the positioning of the substrate; A human-machine interaction device (9) is arranged on one side of the top of the workbench (1), and the human-machine interaction device (9) is used to observe the working status of substrate edge grinding.

2. The flexible adaptive substrate edge grinding machine for a print head according to claim 1, characterized in that: Limiting blocks (637) are symmetrically arranged on both sides of the second waterproof cover (61); an accordion cover slide bar (638) is fixedly connected between the two limiting blocks (637) on each side; a guide sleeve (639) is slidably connected to each accordion cover slide bar (638); a second guide plate (640) is fixedly connected to the top of the two guide sleeves (639); and a foldable accordion cover (641) is fixedly connected to one side of the second guide plate (640).

3. The flexible adaptive substrate edge grinding machine for a print head according to claim 1, characterized in that: The plate transport belt line also includes a symmetrically arranged rotating shaft (32), the two rotating shafts (32) are respectively rotated at the two ends of the top of the base (31), the two belts (33) are respectively transmitted between the two ends of the two rotating shafts (32), one end of one rotating shaft (32) is fixedly connected to a motor (34), the top of the base (31) is rotatably provided with a stop plate (35), and one end of the top of the base (31) is rotatably provided with a stop plate (37); The plate transport belt line is provided with a primary alignment mechanism, the primary alignment mechanism comprising a push plate (36), the push plate (36) is fixedly arranged on the top of the base (31), and a limit plate (38) is rotatably arranged on the other end of the top of the base (31).

4. The flexible adaptive substrate edge grinding machine for a print head according to claim 1, characterized in that: The X / Y / Z three-axis module also includes a base 2 (41), the base 2 (41) is fixed on the top of the workbench (1), an electric guide rail 2 (42) is fixedly arranged on the top of the base 2 (41), an electric guide rail 3 (43) is fixedly arranged on the electric guide rail 2 (42), and the rotating shaft R (44) is slidably arranged on the electric guide rail 3 (43).

5. The flexible adaptive substrate edge grinding machine for a print head according to claim 1, characterized in that: The adsorption device also includes a fixed plate (51), the fixed plate (51) is fixedly arranged on the rotating shaft R (44), the top of the fixed plate (51) is rotatably connected to a second rotating shaft (52), the surface of the second rotating shaft (52) is fixedly connected to a rotating plate (53), one end of the second rotating shaft (52) is fixedly connected to a second motor (54), and a plurality of accordion suction nozzles (55) are fixed to the bottom of the rotating plate (53).

6. The flexible adaptive substrate edge grinding machine for a print head according to claim 1, characterized in that: The spray assembly comprises a displacement groove (62), wherein the displacement groove (62) is provided at one end of the waterproof cover (61), a rack (63) is slidably connected to the bottom of the displacement groove (62), one end of the rack (63) is fixedly connected to a scraper (64), a rack (65) is slidably connected to the top of the displacement groove (62), one end of the rack (65) is fixedly connected to a scraper (66), one end of the displacement groove (62) is fixedly connected to an electric telescopic rod (68), and a guide gear (67) is rotatably connected to the middle of the displacement groove (62), and the rack (63) and the rack (65) are both meshed with the guide gear (67).

7. The flexible adaptive substrate edge grinding machine for a print head according to claim 6, characterized in that: A water inlet (69) is provided on one side of the waterproof cover (61), and two displacement grooves (610) are provided on both sides of the waterproof cover (61), and a screw rod (611) is rotatably connected in each displacement groove (610), and a displacement block (612) is threadedly connected on the surface of the screw rod (611), and one end of the displacement block (612) is fixedly connected to a scraper (613), and a clamping groove (614) is provided on one side of the scraper (613), and a belt (615) is transmission-connected between the two screw rods (611), and one end of a screw rod (611) is fixedly connected to a motor (616), and one side of the displacement block (612) in one end of the displacement groove (610) is fixedly connected to a contact (617), and the other end surface is fixedly connected to a contact (618); A guide groove (619) is provided at the bottom of the waterproof cover No. 2 (61), a telescopic groove (620) is provided at one side of the base No. 3 (71), a clamping groove No. 2 (621) is symmetrically provided at one side of the base No. 3 (71), a scraper No. 4 (622) is slidably connected in the guide groove (619), a return spring (623) is fixedly connected between the bottom of the telescopic groove (620) and the scraper No. 4 (622), clamping plates (624) are fixedly connected at both ends of the scraper No. 4 (622), and a clamping block (625) is symmetrically fixedly provided at one side of the scraper No. 4 (622).

8. The flexible adaptive substrate edge grinding machine for a print head according to claim 6, characterized in that: The other end of the waterproof cover 2 (61) is provided with a displacement groove 3 (626), a rotating rod (627) is rotatably connected in the displacement groove 3 (626), the surface of the rotating rod (627) is symmetrically provided with thread grooves (628), the surface of each thread groove (628) is threadedly connected to a displacement block 2 (629), one end of each displacement block 2 (629) is fixedly connected to a scraper 5 (630), and one end of the rotating rod (627) is fixedly connected to a motor 4 (631).

9. The flexible adaptive substrate edge grinding machine for a print head according to claim 3, characterized in that: The bottom of the second waterproof cover (61) is fixedly connected to a water outlet pipe (632), a bamboo tube (633) is fixedly connected inside the water outlet pipe (632), one end of the bamboo tube (633) is fixedly connected to a water supply pump (634), one side of the water outlet pipe (632) is fixedly connected to a fixing seat and a water inlet pipe (635), and the other end of the first stop plate (35) is fixedly connected to a processing box (636), and the processing box (636) is fixed to the bottom of the workbench (1).

10. The flexible and adaptive substrate edge grinding machine for a print head according to claim 1, characterized in that: The grinding wheel mechanism further comprises a water seepage protection sleeve (72), wherein the water seepage protection sleeve (72) is symmetrically arranged, one water seepage protection sleeve (72) is fixed to the top of the base three (71), and the other water seepage protection sleeve (72) is fixed to the top of the workbench (1), and drainage holes are arranged in the two water seepage protection sleeves (72). A rotating shaft three (73) is rotatably connected between adjacent drainage holes on each water seepage protection sleeve (72), and a wedge-shaped belt (74) is transmission-connected between the two rotating shafts three (73). Two grinding wheels (76) are respectively fixed to the two ends of a rotating shaft three (73) located at the top of the base three (71), and one end of the other water seepage protection sleeve (72) is fixedly connected to a motor six (75). Two ends of the water seepage protection sleeve (72) are fixedly connected to water outlets (77), and one end of each water outlet (77) is fixedly connected to a water spray pipe (78).

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