Chamfering and grinding equipment for marbles with different sizes

Abstract

The invention relates to the field of stone grinding equipment, in particular to different-size marble chamfer grinding equipment which comprises a rack, a threaded lead screw is mounted in the middle of the inner side of the rack, a fixing frame is in threaded connection with the middle of the threaded lead screw, and sliding frames are slidably connected to the two sides of the upper middle of the fixing frame. The sliding frames are connected through telescopic air cylinders, mounting openings are formed in the middles of the sliding frames, guide rods are arranged in the middles of the interiors of the mounting openings, servo motors are mounted at the ends of the two sides of the guide rods, the driving ends of the servo motors are fixedly connected with second threaded rods, and the second threaded rods are rotationally connected to the two sides of the middles of the guide rods. The grinding assembly can be driven to deflect, the inclination angle of the grinding block can be adjusted in real time, the machining angle requirements of various chamfers can be accurately met, full-size marble chamfering grinding is achieved through multi-dimensional adjustment and adaptation, and the problem that traditional equipment can only adapt to marble of a single size is thoroughly solved.

Description

Technical Field

[0001] This invention relates to the field of stone polishing equipment, and more particularly to a marble chamfering and polishing equipment of different sizes. Background Technology

[0002] As the building decoration industry continues to demand higher precision and adaptability in marble processing, traditional marble beveling and grinding equipment has gradually revealed numerous technical shortcomings. Most existing equipment can only accommodate marble slabs of fixed sizes. For marble slabs of different lengths, widths, and thicknesses, specialized clamps and positioning structures must be replaced, resulting in time-consuming and labor-intensive disassembly and adjustment, severely restricting processing efficiency. Furthermore, the beveling angle adjustment structure is mostly manual mechanical, making precision difficult to control and unable to achieve real-time dynamic adjustments during processing, thus failing to meet the diverse processing needs of different taper beveling angles. Simultaneously, the grinding components of traditional equipment are mostly fixed structures, requiring the replacement of grinding blocks of different specifications according to the beveling taper, a cumbersome switching process that is prone to affecting grinding accuracy due to installation errors. For large-sized marble, existing equipment lacks a flexible moving positioning mechanism, making manual handling and adjustment difficult. Small-sized marble is prone to positioning misalignment, leading to inconsistent beveling and grinding quality and high processing costs. Therefore, we propose a beveling and grinding equipment for marble of different sizes to solve the aforementioned problems. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of the prior art by proposing a marble beveling and grinding device of different sizes.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a marble chamfering and grinding device of different sizes, comprising a frame, a threaded screw installed in the middle of the inner side of the frame, a fixed frame threadedly connected to the middle of the threaded screw, sliding frames slidably connected to both sides of the middle of the fixed frame, the sliding frames being connected to each other by a telescopic cylinder, an installation port opened in the middle of each sliding frame, a guide rod provided in the middle of each installation port, a servo motor installed at both ends of each guide rod, a threaded rod II fixedly connected to the drive end of each servo motor, the threaded rod II being rotatably connected to both sides of the middle of the guide rod, and the middle of the outer periphery of the guide rod... Both sides are slidably connected to a sliding sleeve. The two threaded rods pass through the sliding sleeves and are threadedly connected to them. Both sides of one end of the sliding sleeve are rotatably connected to an electric push rod and an electric slide. The electric push rods are all located on the side of the sliding sleeve that is close to each other, and the electric slides are all located on the side of the sliding sleeve that is far away from each other. The end of the electric push rod that is far from the sliding sleeve is rotatably connected to the electric slide. The moving part of the electric slide that is far from the electric push rod is fixedly connected to a protective cover. The middle of the protective cover is rotatably connected to a rotating shaft. Multiple grinding blocks are installed on the middle of the outer circumference of the rotating shaft. The grinding blocks are all conical and arranged in order of decreasing taper.

[0005] Preferably, support frames are installed on both sides of the top of the frame, and evenly distributed ball bearings are provided on the support frames. Both the ball bearings and the support frames are used to support the stone to be polished, and electric telescopic frames are provided at the front and rear of the support frames.

[0006] Preferably, threaded rods are threaded through both sides of the bottom of the electric telescopic frame, and a drive motor is installed at the end of each threaded rod. The drive motors are installed on the inner side of the top of the frame. Each threaded rod is threadedly connected to one electric telescopic frame and does not contact the other electric telescopic frame.

[0007] Preferably, an air pump is installed at the end of the protective cover near the guide rod, the working end of the air pump is fixedly connected to a connecting pipe, the input end of the air pump is connected to an air collection hood through a connecting pipe, and the output end of the air pump is connected to an air outlet hood through a connecting pipe.

[0008] Preferably, the gas collecting hoods are installed on both sides of the inner cavity of the protective cover, and the gas venting hoods are installed in the middle of the inner cavity of the protective cover, with the working ends of the gas collecting hoods and the gas venting hoods facing the grinding block.

[0009] Preferably, the inner sidewall of the mounting port is provided with a ring tooth groove, the end of the guide rod is fixedly connected to a slide plate, one side of the middle of the slide plate is fixedly connected to a stepper motor, and the driving end of the stepper motor is fixedly connected to a drive gear.

[0010] Preferably, all the drive gears are rotatably connected to the inner side of one end of the slide plate, and the side of the drive gear away from the slide plate is engaged with the ring tooth groove.

[0011] Preferably, the end of the protective cover away from the air pump is fixedly connected to a fixed chamber, and a geared motor is installed inside the fixed chamber. The drive end of the geared motor is fixedly connected to a drive gear.

[0012] Preferably, each of the driving gears is meshed with a driven gear on one side, and the driven gears are all fixedly connected to the outer peripheral end of the rotating shaft. Both the driving gear and the driven gear are located inside the fixed chamber.

[0013] Preferably, the fixed frame is slidably connected to the base frame on both sides, the top of the base frame is slidably connected to the bottom of the sliding frame, and the front and rear ends of the base frame are fixedly connected to the machine frame.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention achieves comprehensive adaptation to marble of different sizes and thicknesses through a multi-level adjustment structure. The telescopic cylinder can adjust the distance between the sliding frames on both sides, allowing the grinding components to quickly approach the chamfer of stones of different widths. The servo motor drives the threaded rod to achieve the movement of the sliding sleeve along the guide rod, completing the individual adjustment of the spacing and position of the grinding components, adapting to marble of different thicknesses and different chamfer conditions on the upper and lower parts of the stone. The electric push rod can drive the grinding components to deflect, adjusting the tilt angle of the grinding block in real time, accurately matching the processing angle requirements of various chamfers. Through multi-dimensional adjustment and adaptation, full-size marble chamfer grinding can be achieved, completely solving the problem that traditional equipment can only adapt to marble of a single size.

[0015] 2. The grinding component of this invention has multiple conical grinding blocks installed on its rotating shaft in descending order of taper. With the movement function of the electric slide, the grinding blocks in contact with the stone chamfer can be flexibly switched according to the grinding needs, realizing a step-by-step operation from coarse grinding to fine grinding. There is no need to manually change grinding accessories, which reduces the downtime of the operation and makes the grinding precision and smoothness of the marble chamfer more in line with the processing standards, thus improving the quality of the finished product.

[0016] 3. This invention innovatively designs a meshing structure between a ring tooth groove and a drive gear. By driving the drive gear to rotate through a stepper motor, the guide rod and grinding components can be flexibly deflected. Combined with the real-time adjustment of the threaded rod and the electric push rod, it can not only complete the chamfering and grinding of conventional flat marble, but also perform precise chamfering and grinding of irregularly shaped stones such as arches and cylinders. At the same time, the upper and lower grinding components can be adjusted independently to adapt to the grinding needs of marbles with different thicknesses on one side. This breaks the limitation of traditional equipment in a single grinding scenario and allows the equipment to play a role in various stone processing scenarios.

[0017] 4. This invention integrates a debris cleaning structure consisting of an air pump, an air collection hood, and an air outlet hood on the protective cover of the grinding component. The air pump can adsorb debris generated during the grinding process in real time through the air collection hood, preventing debris from adhering to the surface of the grinding block and affecting the grinding effect. At the same time, the air outlet hood can spray gas onto the grinding block to blow away the stubborn debris adsorbed on the grinding block, making it easier for the air collection hood to thoroughly adsorb and clean it. This achieves simultaneous grinding and debris cleaning, eliminating the need for manual interruption for cleaning, ensuring the continuity of grinding work, and also reducing the pollution of the processing environment by debris. Attached Figure Description

[0018] Figure 1 This is a frontal three-dimensional structural diagram of a marble beveling and polishing device of different sizes according to the present invention; Figure 2 This is a side-view perspective three-dimensional structural diagram of a marble beveling and polishing device of different sizes according to the present invention; Figure 3This is a bottom-view three-dimensional structural diagram of a marble chamfering and polishing device of different sizes according to the present invention; Figure 4 This is a partial structural diagram of the sliding frame of a marble beveling and grinding device of different sizes according to the present invention; Figure 5 This is a partial structural diagram of the guide rod of a marble chamfering and grinding device of different sizes according to the present invention; Figure 6 This is a partial structural diagram of the air collection hood and electric telescopic frame of a marble chamfering and grinding equipment of different sizes according to the present invention; Figure 7 This is a partial structural diagram of the air pump part of a marble beveling and grinding device of different sizes according to the present invention.

[0019] 101. Frame; 102. Base frame; 103. Fixed frame; 104. Ball bearing; 105. Electric telescopic frame; 106. Sliding frame; 107. Ring tooth groove; 108. Protective cover; 109. Threaded rod one; 110. Slide plate; 111. Sliding sleeve; 112. Guide rod; 113. Threaded rod two; 114. Telescopic cylinder; 115. Threaded screw; 116. Fixed chamber; 117. Grinding block; 118. Electric push rod; 119. Air pump; 120. Electric slide; 121. Drive gear; 122. Driving gear; 123. Driven gear; 124. Air collection hood; 125. Air outlet hood; 126. Connecting pipe; 127. Rotating shaft. Detailed Implementation

[0020] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0021] like Figures 1-7The illustrated marble chamfering and grinding equipment includes a frame 101. A threaded screw 115 is installed in the middle of the inner side of the frame 101. A fixed frame 103 is threadedly connected to the middle of the threaded screw 115. A base frame 102 is slidably connected to both sides of the fixed frame 103. The top of each base frame 102 is slidably connected to the bottom of a sliding frame 106. The front and rear ends of the base frame 102 are fixedly connected to the frame 101. Sliding frames 106 are slidably connected to both sides of the upper middle part of the fixed frame 103. The sliding frames 106 are connected to each other via telescopic cylinders 114. Support frames are installed on both sides of the top of the frame 101. Evenly distributed balls 104 are provided on the support frames. Both the balls 104 and the support frames are used to support the stone to be polished. Electric telescopic frames 105 are provided at the front and rear of the support frames. Threaded rods 109 are passed through both sides of the bottom of the electric telescopic frames 105. Drive motors are installed at the ends of the threaded rods 109. The drive motors are installed on the inner side of the top of the frame 101. The threaded rods 109 are threadedly connected to one electric telescopic frame 105 and do not contact the other electric telescopic frame 105. Furthermore, in practical implementation, the equipment can be used to grind the chamfered edges of marble. In actual use, the chamfered marble is first placed on top of the frame 101. The ball bearings 104 on the top of the frame 101 facilitate the adjustment of the marble's position. Then, the drive motor at the end of the threaded rod 109 is activated, causing the threaded rod 109 to rotate. The threaded rod 109 then moves the electric telescopic frames 105 on both sides closer to the marble to be ground. Simultaneously, the electric telescopic frames 105 begin to operate, extending their telescopic ends. When the electric telescopic frames 105 are close to the marble's end face, the telescopic ends of the electric telescopic frames 105 can achieve grinding of the marble's surface. The marble clamping facilitates subsequent polishing of the marble chamfer. During polishing, the telescopic cylinder 114 is activated first. The telescopic cylinder 114 adjusts the distance between the two sliding frames 106, allowing the polishing block 117 assembly in the middle of the sliding frame 106 to approach the marble chamfer for size adaptation. Then, the threaded screw 115 is activated, which drives the fixed frame 103 to work. The fixed frame 103 moves the upper sliding frame 106 and the polishing block 117 assemblies on both sides of the sliding frame 106 along the chamfer edge of the marble, ensuring that the polishing block 117 assemblies fully contact the marble chamfer and complete the polishing work.

[0022] Each sliding frame 106 has an installation port in its middle, and a guide rod 112 is installed in the middle of each installation port. A servo motor is installed on both ends of the guide rod 112, and a threaded rod 113 is fixedly connected to the drive end of each servo motor. The threaded rod 113 is rotatably connected to both sides of the middle of the guide rod 112. A sliding sleeve 111 is slidably connected to both sides of the middle of the outer periphery of the guide rod 112. The threaded rod 113 passes through the sliding sleeve 111 and is threadedly connected to the sliding sleeve 111. An electric push rod 118 is rotatably connected to both sides of one end of the sliding sleeve 111 and to the electric sliding frame 120. The push rods 118 are all located on the side close to the end of the slide sleeve 111, and the electric slide 120 is all located on the side away from the end of the slide sleeve 111. The end of the electric push rod 118 away from the slide sleeve 111 is rotatably connected to the electric slide 120. The moving part of the end of the electric slide 120 away from the electric push rod 118 is fixedly connected to the protective cover 108. The middle of the protective cover 108 is rotatably connected to the rotating shaft 127. Multiple grinding blocks 117 are installed on the middle of the outer periphery of the rotating shaft 127. The grinding blocks 117 are all conical and arranged in order of decreasing taper. Furthermore, in specific implementation, the electric push rod 118 can be activated, which drives the protective cover 108 and the grinding block 117 assembly to deflect, allowing the tilt angle of the grinding block 117 to be adjusted in real time, so that the final chamfer after grinding meets the processing requirements. During the grinding process, the servo motor can be activated, which drives the threaded rod 113 to work. The threaded rod 113 drives the sliding sleeve 111 connected to it to move along the guide rod 112, thereby enabling individual adjustment of the distance, position, and angle between the protective cover 108 and the grinding block 117, so as to conform to the thickness of the marble and the actual chamfer of the upper and lower parts. During grinding, the electric slide 120 can be activated, which drives the protective cover 108 to move, thereby switching the individual grinding blocks 117 in contact with the chamfer of the marble, thus realizing the "coarse first, fine later" grinding work.

[0023] Among them, an air pump 119 is installed at one end of the protective cover 108 near the guide rod 112. The working end of the air pump 119 is fixedly connected to the connecting pipe 126. The input end of the air pump 119 is connected to the air collection cover 124 through the connecting pipe 126. The output end of the air pump 119 is connected to the air outlet cover 125 through the connecting pipe 126. The air collection cover 124 is installed on both sides of the inner cavity of the protective cover 108. The air outlet cover 125 is installed in the middle of the inner cavity of the protective cover 108. The working ends of the air collection cover 124 and the air outlet cover 125 face the grinding block 117. Furthermore, in specific implementation, the air pump 119 can be activated, and the air pump 119 is connected to the air collection hood 124 and the air outlet hood 125 through the connecting pipe 126. The operation of the air pump 119 allows the air collection hood 124 to draw in the surrounding air, thereby achieving adsorption and cleaning of the corresponding grinding block 117, thus sucking down the grinding debris on the grinding block 117 and completing the cleaning. At the same time, the air outlet hood 125 can spray out the gas, which can spray and clean the grinding block 117, thereby blowing away the stubborn debris adsorbed on the grinding block 117, facilitating the subsequent adsorption and cleaning work of the air collection hood 124, and promoting the continuous grinding work.

[0024] Among them, the inner sidewall of the mounting port is provided with a ring tooth groove 107, the end of the guide rod 112 is fixedly connected to a slide plate 110, the middle side of the slide plate 110 is fixedly connected to a stepper motor, the driving end of the stepper motor is fixedly connected to a drive gear 121, the drive gear 121 is rotatably connected to the inner side of one end of the slide plate 110, and the side of the drive gear 121 away from the slide plate 110 is meshed with the ring tooth groove 107. Furthermore, in practical implementation, when chamfering and grinding arched or cylindrical stone, the stepper motor on the slide plate 110 drives the connected drive gear 121 to rotate. The drive gear 121 can cooperate with the ring tooth groove 107 to deflect the guide rod 112 and the grinding block 117 assembly. With the real-time adjustment of the threaded rod 113 and the electric push rod 118, the chamfering and grinding work of arched or cylindrical stone can be completed. At the same time, the individual adjustability of the upper and lower grinding block 117 assemblies allows the grinding block 117 to complete the chamfering and grinding of marble with different thicknesses on one side, making it more adaptable and beneficial to practical use.

[0025] Among them, the end of the protective cover 108 away from the air pump 119 is fixedly connected to a fixed chamber 116. A geared motor is installed inside the fixed chamber 116. The drive end of the geared motor is fixedly connected to a drive gear 122. A driven gear 123 is meshed on one side of the drive gear 122. The driven gear 123 is fixedly connected to the outer peripheral end of the rotating shaft 127. The drive gear 122 and the driven gear 123 are both located inside the fixed chamber 116. Furthermore, in specific implementation, people can start the geared motor inside the fixed chamber 116, which drives the drive gear 122 to rotate. The drive gear 122 drives the driven gear 123 meshing with it to rotate synchronously. The driven gear 123 drives the rotating shaft 127 fixed to it to rotate. The rotating shaft 127 drives the various grinding blocks 117 installed on the outer periphery to rotate. The high-speed rotating grinding blocks 117 can achieve grinding of the chamfered edge of the marble.

[0026] Working principle:In practical use, the equipment can be used to grind the chamfered edges of marble. Specifically, the chamfered marble is first placed on top of the frame 101. The ball bearings 104 on top of the frame 101 allow for easy adjustment of the marble's position. Then, the drive motor at the end of the threaded rod 109 is activated, causing the threaded rod 109 to rotate. This rotation further drives the electric telescopic frames 105 on both sides closer to the marble to be ground. Simultaneously, the electric telescopic frames 105 begin to operate, extending their telescopic ends. When the electric telescopic frames 105 are close to the marble's surface, they clamp the marble. To facilitate subsequent grinding of the marble chamfer, during grinding, the telescopic cylinder 114 can be activated first. The operation of the telescopic cylinder 114 adjusts the distance between the two sliding frames 106, allowing the grinding block 117 assembly in the middle of the sliding frame 106 to approach the marble chamfer for a proper size fit. After adjustment, the electric push rod 118 can be activated, causing the protective cover 108 and the grinding block 117 assembly to deflect, allowing real-time adjustment of the grinding block 117's tilt angle. This ensures the final chamfer meets processing requirements. During grinding, the servo motor can be activated, driving the threaded rod 113 to operate. Rod 113 can drive the threaded sleeve 111 to move along the guide rod 112, thereby enabling individual adjustment of the distance, position, and angle between the protective cover 108 and the grinding block 117, so as to conform to the thickness of the marble and the actual chamfering of the upper and lower parts. Further, the threaded screw 115 can be activated, which drives the fixing frame 103 to work. The fixing frame 103 can drive the upper sliding frame 106 and the grinding block 117 assemblies on both sides of the sliding frame 106 to move along the chamfered edge of the marble, allowing the grinding block 117 assemblies to fully contact the chamfered area of ​​the marble, completing the grinding work. During the actual grinding process, the fixing... The geared motor inside compartment 116 drives the drive gear 122 to rotate, which in turn drives the driven gear 123 to rotate synchronously. The driven gear 123 drives the fixed shaft 127 to rotate, which in turn drives the various grinding blocks 117 mounted on the outer periphery to rotate. The high-speed rotation of the grinding blocks 117 can grind the chamfered edges of the marble. During grinding, the electric slide 120 can be activated, which moves the protective cover 108, allowing the individual grinding blocks 117 in contact with the chamfered edges of the marble to be switched, thus achieving a "coarse then fine" grinding process.When chamfering and grinding arched or cylindrical stone, the stepper motor on the slide plate 110 drives the connected drive gear 121 to rotate. The drive gear 121 engages with the ring gear groove 107, deflecting the guide rod 112 and the grinding block 117 assembly. Combined with the real-time adjustment of the threaded rod 113 and the electric push rod 118, the chamfering and grinding of arched or cylindrical stone can be completed. Furthermore, the individual adjustability of the upper and lower grinding block 117 assemblies allows for chamfering and grinding of marble with varying thicknesses on one side, making it more adaptable and beneficial for practical use. During polishing, the air pump 119 can be activated. Connecting pipe 126 links the air pump 119 to the air collection hood 124 and the air outlet hood 125. The air pump 119, through the air collection hood 124, draws in surrounding air to clean the polishing block 117, removing polishing debris. Simultaneously, the air outlet hood 125 ejects air, further cleaning the polishing block 117 and dislodging stubborn debris, facilitating subsequent cleaning by the air collection hood 124 and ensuring the continued polishing process.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A marble corner polishing apparatus of different sizes, comprising a frame (101), characterized in that: The middle part of the frame (101) is provided with a threaded screw rod (115), the middle part of the threaded screw rod (115) is provided with a fixed frame (103), the both sides of the middle part of the fixed frame (103) are slidably connected with sliding frames (106), the sliding frames (106) are connected by telescopic cylinders (114), the middle part of the sliding frame (106) is provided with an installation opening, the middle part of the installation opening is provided with a guide rod (112), the both sides of the end part of the guide rod (112) is provided with a servo motor, the driving end of the servo motor is fixedly connected with a threaded rod two (113), the both sides of the middle part of the threaded rod two (113) is rotatably connected with the guide rod (112), the both sides of the middle part of the outer circumference of the guide rod (112) is slidably connected with a sliding sleeve (111), the threaded rod two (113) penetrates through the sliding sleeve (111) and is threadedly connected with the sliding sleeve (111), one end of the sliding sleeve (111) is rotatably connected with an electric push rod (118) and an electric sliding frame (120), the electric push rod (118) is arranged on the side close to the end part of the sliding sleeve (111), the electric sliding frame (120) is arranged on the side away from the end part of the sliding sleeve (111), the end of the electric push rod (118) away from the sliding sleeve (111) is rotatably connected with the electric sliding frame (120), the end of the electric sliding frame (120) away from the electric push rod (118) is fixedly connected with a protective cover (108), the middle part of the protective cover (108) is rotatably connected with a rotating shaft (127), a plurality of polishing blocks (117) are arranged on the middle part of the outer circumference of the rotating shaft (127), the polishing blocks (117) are conical bodies and are arranged in order from large to small according to the taper.

2. A marble chamfering device of different sizes according to claim 1, characterized in that: The both sides of the top of the frame (101) is provided with a supporting frame, the supporting frame is provided with uniformly distributed balls (104), the balls (104) and the supporting frame are used for bearing the stone to be polished, the front and rear parts between the supporting frames are provided with electric telescopic frames (105).

3. A marble chamfering device of different sizes according to claim 2, characterized in that: The both sides of the bottom of the electric telescopic frame (105) penetrates a threaded rod one (109), the end of the threaded rod one (109) is provided with a driving motor, the driving motor is arranged on the inside of the top of the frame (101), the threaded rod one (109) is threadedly connected with one electric telescopic frame (105) and is not in contact with the other electric telescopic frame (105).

4. A marble chamfering device of different sizes according to claim 1 characterized in that: The end of the protective cover (108) close to the guide rod (112) is provided with an air pump (119), the working end of the air pump (119) is fixedly connected with a connecting pipe (126), the input end of the air pump (119) is connected with a gas collecting cover (124) through the connecting pipe (126), the output end of the air pump (119) is connected with an air outlet cover (125) through the connecting pipe (126).

5. A marble chamfering device of different sizes according to claim 4, characterized in that: The both sides of the inner cavity of the protective cover (108) is provided with the gas collecting cover (124), the middle part of the inner cavity of the protective cover (108) is provided with the air outlet cover (125), the working end of the gas collecting cover (124) and the air outlet cover (125) faces the polishing block (117).

6. A marble chamfering device of different sizes according to claim 1 characterized in that: Ring tooth grooves (107) are arranged in the middle of the inner side walls of the mounting ports, the end portions of the guide rods (112) are fixedly connected with sliding plates (110), the middle portions of the sliding plates (110) are fixedly connected with stepping motors on one side, and the driving ends of the stepping motors are fixedly connected with driving gears (121).

7. A marble chamfering device of different sizes according to claim 6, characterized in that: The driving gears (121) are rotationally connected to the inner side of one end of the sliding plates (110), and the sides, away from the sliding plates (110), of the driving gears (121) are meshingly connected with the ring tooth grooves (107).

8. A marble chamfering device of different sizes according to claim 1 characterized in that: The ends, away from the air pumps (119), of the protective covers (108) are fixedly connected with fixed bins (116), the fixed bins (116) are internally provided with reduction motors, and the driving ends of the reduction motors are fixedly connected with driving gears (122).

9. A device for polishing marble chamfers of different sizes according to claim 8, characterized in that: The sides of the driving gears (122) are meshingly connected with driven gears (123), the driven gears (123) are fixedly connected to the outer circumferential end portions of rotating shafts (127), and the driving gears (122) and the driven gears (123) are arranged in the fixed bins (116).

10. A marble chamfering device of different sizes according to claim 1 characterized in that: The two sides of the fixed frames (103) are slidingly connected with underframes (102), the top portions of the underframes (102) are slidingly connected with the bottom portions of the sliding frames (106), and the front and rear end portions of the underframes (102) are fixedly connected with the racks (101).

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