Sandstone picture edge flattening treatment device

Abstract

The invention discloses a sandstone painting edge flattening treatment device, and relates to the field of sandstone painting processing, the sandstone painting edge flattening treatment device comprises a workbench for placing a to-be-processed sandstone painting, and the workbench is provided with a polishing wheel for polishing the edge of the to-be-processed sandstone painting; the grinding wheel moves along the edge of the to-be-processed sandstone painting to grind the edge of the to-be-processed sandstone painting; a pressing roller is further arranged on the workbench, in the polishing operation, the pressing roller and the polishing wheel keep moving synchronously at a constant speed, the pressing area of the pressing roller accurately corresponds to the real-time polishing position of the polishing wheel all the time, and pressing force is intensively acted on the edge of the top end of the to-be-machined sandstone picture through the follow-up pressing design; the gap between the area and the working table top can be effectively eliminated, the edge breakage phenomenon is reduced, meanwhile, the downward pressing roller can adapt to sandstone paintings to be machined of different lengths and widths, and the sandstone paintings of different lengths can be adapted without replacing adaptive parts.

Description

Technical Field

[0001] The present invention relates to the field of sandstone painting processing, and in particular to a sandstone painting edge smoothing processing device. Background Art

[0002] In the sandstone painting production process, smoothing the edges of the sandstone slabs is a critical step in ensuring the quality of the work. Traditional methods of sandstone edge preparation rely on manual hand-held grinding tools. This is not only labor-intensive and inefficient, but also difficult to ensure smoothness and consistency of the edge grinding. Especially for sandstone slabs of large size or uneven thickness, manual operation is prone to defects such as cracking and denting due to unstable force, which seriously affects the subsequent creation and overall aesthetic of the sandstone painting.

[0003] Existing fixing devices often utilize a fully covered pressing structure (such as a single pressing plate), which secures the sandstone painting by covering a large area of ​​the surface. This method is only suitable for sandstone paintings of specific sizes. When working on works of varying lengths and widths, the pressing plate must be frequently replaced with the appropriate length to ensure stable pressing. This cumbersome operation and poor adaptability significantly limit processing efficiency. The fully covered pressing method also disperses the pressure across the sandstone painting surface, making it difficult to concentrate the pressing force on the edges to be polished. During polishing, uneven force can easily create gaps between the edges and the work surface, leading to vibration and displacement during polishing, which can cause edge chipping.

[0004] Therefore, it is necessary to propose a sandstone painting edge smoothing device to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a device for smoothing the edges of sandstone paintings to solve the problems that existing fixing devices mostly adopt an integral covering pressing structure (such as a whole pressing plate), which causes cumbersome operation, poor adaptability, low processing efficiency, and unconcentrated pressing force.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a device for smoothing the edge of a sandstone painting, comprising a workbench for placing the sandstone painting to be processed, the workbench being provided with a grinding wheel for grinding the edge of the sandstone painting to be processed; The grinding wheel moves along the edge of the sandstone painting to be processed to grind the edge of the sandstone painting to be processed; The workbench is also provided with a lower pressing roller, which is used to press the edge of the upper surface of the sandstone painting to be processed. The lower pressing roller moves synchronously with the grinding wheel and is arranged on one side of the grinding wheel in the horizontal direction. The top of the workbench is provided with an electric track, a moving mechanism is slidably mounted on the electric track, a fixed plate is slidably mounted on the moving mechanism, a third electric push rod is provided at the bottom end of the fixed plate away from the sandstone painting to be processed, and one end of the third electric push rod is connected to a protruding plate; A fixed block is fixed to one side of the bottom end of the extended plate, and a groove is provided at the bottom end of the fixed block close to the sandstone painting to be processed. Talc is arranged in the groove, and a telescopic spring is fixed to one end of the groove. An extrusion plate is fixed to one end of the telescopic spring. The extrusion plate is movably connected to one end of the talc, and the other end of the talc is in contact with the sandstone painting to be processed.

[0007] Preferably, a grinding groove is provided on the workbench, and the grinding groove corresponds to one end of the sandstone painting to be processed; A first spring telescopic rod is fixed to the bottom end of the fixed plate, a fixing frame is fixed to the bottom end of the first spring telescopic rod, and the lower pressing roller is rotatably connected to the fixing frame; A third electric push rod is provided at the bottom end of the fixed plate away from the sandstone painting to be processed, one end of the third electric push rod is connected to an extension plate, a first motor is fixed on the extension plate, and the grinding wheel is fixed on the driving shaft at the bottom of the first motor.

[0008] Preferably, a pressure sensor is installed at the connection portion between the third electric push rod and the extension plate.

[0009] Preferably, two long rails are fixed on one side of the moving mechanism, a moving block is slidably installed between the two long rails, a downward-pressing adsorption plate is provided at the bottom end of the moving block, and the downward-pressing adsorption plate is pressed downward and adsorbed on the upper surface of the sandstone painting to be processed, and a second electric push rod is fixed between the moving block and the moving mechanism.

[0010] Preferably, a second motor is fixed to the top of the moving block, a driving shaft at the bottom of the second motor extends out of the moving block, and a turntable is fixedly connected to the outer side of the extended end; A second spring telescopic rod is fixed to the bottom end of the turntable, the top of the downward-pressing adsorption plate is fixedly connected to the second spring telescopic rod, a pump body is provided on one side of the top end of the downward-pressing adsorption plate, a cavity is opened inside the downward-pressing adsorption plate, a plurality of adsorption holes are opened at the bottom end of the downward-pressing adsorption plate, the adsorption holes are connected to the cavity, and the pump body is connected to the cavity through a pipe.

[0011] Preferably, there are two electric rails, and the moving mechanism includes two electric sliders, which are respectively slidably mounted on the corresponding electric rails. A cylinder is fixed on the top of each electric slider, and a supporting block is inherently provided on the top of the cylinder, and a fixing seat is fixed on the top of the supporting block; A lead screw is rotatably connected between the two ends of the fixed seat, and a lead screw block is matched with a thread on the outer side of the lead screw. The lead screw block is slidably installed inside the fixed seat, and the fixed plate is fixed to one side of the lead screw. A drive motor is fixed to one end of the fixed seat, and the drive shaft of the drive motor is fixedly connected to one end of the lead screw.

[0012] Preferably, an auxiliary block is fixed on the side of the two electric sliders away from the grinding groove, and the two auxiliary blocks are slidably installed on the corresponding electric rails. A first electric push rod is fixed on the opposite side of the two auxiliary blocks, and a push plate is fixed on the opposite end of the two first electric push rods. The two push plates are respectively clamped on both sides of the sandstone painting to be processed.

[0013] Preferably, a telescopic slot is provided at the top of the workbench, a third spring telescopic rod is fixed to the bottom end of the telescopic slot, a support plate is fixed to the top of the third spring telescopic rod, a buffer pad is fixed to the top of the support plate, and the support plate is arranged below the sandstone painting to be processed.

[0014] Preferably, a suction port is provided on the inner wall of the grinding tank, a vacuum cleaner is fixed inside the workbench, and a connecting pipe is connected between the vacuum cleaner and the suction port; A side of the top of the grinding trough away from the sandstone painting to be processed is provided with a panel, and the bottom end of the panel is fixed on the workbench.

[0015] The technical effects and advantages of the present invention are as follows: 1. During the grinding operation, the lower pressure roller and the grinding wheel keep moving synchronously and at a constant speed. The pressing area always corresponds precisely to the real-time grinding position of the grinding wheel. The follow-up pressing design concentrates the downward pressure on the top edge of the sandstone painting to be processed, effectively eliminating the gap between this area and the work surface and reducing the occurrence of edge chipping. At the same time, the lower pressure roller can adapt to sandstone paintings of different lengths and widths to be processed. Compared with the traditional overall covering pressing, it not only significantly broadens the scope of application, but also concentrates the pressing force on the grinding area to prevent and reduce edge chipping. 2. The lower pressure roller is connected to the fixed frame via a first spring telescopic rod. Its elastic pressure can be adaptively adjusted according to the slight fluctuations of the sandstone painting edge, ensuring the stability of the pressing while avoiding surface damage caused by excessive local pressure. The rotational characteristics of the roller convert sliding friction into rolling friction, further reducing wear on the sandstone painting surface and ensuring the integrity of the finished appearance. Because the lower pressure roller moves synchronously with the grinding wheel and the pressing position always corresponds to the grinding position, when the grinding wheel applies grinding force to the edge, the lower pressure roller can provide a real-time reverse pressing force to offset some of the grinding vibration. This dynamic balancing effect can reduce the slight displacement of the sandstone painting caused by vibration and ensure the consistency of the grinding trajectory. 3. When the position of the moving mechanism is fixed, the push plate clamps the sandstone painting to be processed from both sides under the action of the first electric push rod, and the lower pressure roller and the lower pressure adsorption plate fix the sandstone painting to be processed from the top. The multi-directional fixing method can effectively prevent the sandstone painting to be processed from displacement or shaking during the grinding process, ensure the accuracy of the grinding position, and avoid grinding deviation caused by unstable fixation; 4. When the sanding is completed, the second spring telescopic rod will rise last due to its long length. At this time, the downward pressure on the adsorption plate will still play an adsorption role, causing the sandstone painting to rise slightly, thereby separating from the workbench and the support plate, avoiding friction between the workbench and the workbench during rotation. At the same time, the support plate loses pressure and extends upward to support the bottom of the sandstone painting to be processed; if the sandstone painting to be processed falls, the support plate can also provide support and cushioning for the sandstone painting to be processed. 5. The rotation of the second motor can drive the sandstone painting to be processed to rotate, making it convenient to grind different sides and grinding grooves of the sandstone painting to be processed, reducing the time of manual adjustment and improving work efficiency; 6. The cushioning pad on top of the support plate not only prevents direct contact between the sandstone painting and the support plate, which can cause wear, but its own friction also effectively prevents the sandstone painting from moving after placement, laying a stable foundation for subsequent fixing and polishing. It can guide the operator to quickly identify the placement position, ensuring that the sandstone painting is accurately placed in the appropriate position. When the subsequent downward pressure roller presses down on the sandstone painting, the support plate retracts into the expansion slot under the pressure, causing no interference with the subsequent fixing and polishing procedures, ensuring the smoothness of the entire operation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of the device for smoothing the edges of sandstone paintings according to the present invention.

[0017] Figure 2 This is a schematic diagram of the grinding groove and adsorption port structure of the present invention.

[0018] Figure 3 For the present invention Figure 1 Enlarged schematic diagram of point A in the middle.

[0019] Figure 4 For the present invention Figure 2 Enlarged schematic diagram of point B in the middle.

[0020] Figure 5 This is a schematic structural diagram of the first electric push rod and push plate of the present invention.

[0021] Figure 6 For the present invention Figure 5 Enlarged schematic diagram at point C in the middle.

[0022] Figure 7It is a structural schematic diagram of the expansion slot and the support plate of the present invention.

[0023] Figure 8 It is a structural schematic diagram of the telescopic spring of the present invention.

[0024] In the figure: 1. workbench; 2. vacuum cleaner; 3. connecting pipe; 4. electric track; 5. moving mechanism; 6. lead screw; 7. fixed seat; 8. electric slider; 9. cylinder; 10. support block; 11. enclosure; 12. grinding groove; 13. suction port; 14. fixed plate; 15. extension plate; 16. first spring telescopic rod; 17. fixed frame; 18. lower pressure roller; 19. first motor; 20. grinding wheel; 21. fixed block; 22. talc; 23. auxiliary block; 24. first electric push rod; 25. push plate; 26. sandstone painting to be processed; 27. long rail; 28. second electric push rod; 29. ​​moving block; 30. second motor; 31. turntable; 32. second spring telescopic rod; 33. lower pressure adsorption plate; 34. pump body; 35. telescopic groove; 36. support plate; 37. groove; 38. telescopic spring; 39. extrusion plate. DETAILED DESCRIPTION

[0025] The present invention provides Figures 1 to 8 The device for smoothing the edge of a sandstone painting shown in the figure comprises a workbench 1 and an electric track 4 provided on the workbench 1. A moving mechanism 5 is provided on the electric track 4. A grinding groove 12 is provided on one side of the top of the workbench 1. like Figure 1 、 5 As shown in , 7 , a sandstone painting 26 to be processed is placed on the workbench 1, with one end of the sandstone painting 26 facing the grinding groove 12. A telescopic groove 35 is provided at the top of the workbench 1, and a third spring telescopic rod is fixed to the bottom end of the telescopic groove 35. A support plate 36 is fixed to the top of the third spring telescopic rod, and a buffer pad is fixed to the top of the support plate 36. The support plate 36 is arranged below the sandstone painting 26 to be processed.

[0026] The cushioning pad on top of the support plate 36 not only prevents direct contact between the sandstone painting 26 and the support plate 36, which can cause wear, but its inherent friction also effectively prevents movement of the sandstone painting 26 after placement, providing a stable foundation for subsequent fixing and polishing. This helps the operator quickly identify the placement position, ensuring that the sandstone painting 26 is precisely positioned. When the pressing roller 18 subsequently presses down on the sandstone painting 26, the pressure on the support plate 36 retracts into the expansion slot 35, preventing any interference with the subsequent fixing and polishing procedures and ensuring a smooth operation.

[0027] like Figure 1 、 3As shown in Figure 5, two electric rails 4 are provided, and the moving mechanism 5 includes two electric sliders 8. The two electric sliders 8 are respectively slidably mounted on the corresponding electric rails 4. After the electric rails 4 are electrically connected, the electric sliders 8 can be moved along the length direction of the electric rails 4, so that the moving mechanism 5 moves and the pressing structure moves to a suitable position to press down and fix the sandstone painting 26 to be processed. Auxiliary blocks 23 are fixed on the side of the two electric sliders 8 away from the grinding groove 12. The two auxiliary blocks 23 are respectively slidably mounted on the corresponding electric rails 4. A first electric push rod 24 is fixed on the opposite side of the two auxiliary blocks 23, and a push plate 25 is fixed on the opposite side of the two first electric push rods 24. The two push plates 25 are respectively clamped on both sides of the sandstone painting 26 to be processed. When the position of the moving mechanism 5 is fixed, the push plates 25 clamp the sandstone painting 26 to be processed from both sides under the action of the first electric push rod 24.

[0028] A cylinder 9 is fixed on the top of each of the two electric sliders 8. A supporting block 10 is fixed on the top of the cylinder 9. A fixing seat 7 is fixed on the top of the supporting block 10. The height of the fixing seat 7 can be adjusted by extending and retracting the cylinder 9 to adapt to sandstone paintings 26 to be processed of different thicknesses, thereby greatly improving the versatility of the device.

[0029] like Figure 5 、 6 As shown, two long rails 27 are fixed to one side of the moving mechanism 5, and a moving block 29 is slidably installed between the two long rails 27. A downward-pressing adsorption disk 33 is provided at the bottom end of the moving block 29. The downward-pressing adsorption disk 33 presses down and adsorbs on the upper surface of the sandstone painting 26 to be processed. A second electric push rod 28 is fixed between the moving block 29 and the moving mechanism 5. A second motor 30 is fixed to the top of the moving block 29. The second motor 30 is fixed to the top of the moving block 29. The driving shaft of the second motor 30 extends out of the moving block 29, and a turntable 31 is fixedly connected to the outer side of the extended end. A second spring telescopic rod 32 is fixed to the bottom end of the turntable 31, and the top of the downward-pressing adsorption disk 33 is connected to the second spring telescopic rod 32. A pump body 34 is provided on one side of the top of the downward-pressing adsorption disk 33. A cavity is opened inside the downward-pressing adsorption disk 33, and a plurality of adsorption holes are opened at the bottom end of the downward-pressing adsorption disk 33. The adsorption holes and the cavity are connected, and the pump body 34 is connected to the cavity through a pipe. When the pump body 34 is working, the air in the cavity can be extracted, so that the downward-pressing adsorption disk 33 can be tightly adsorbed on the upper surface of the sandstone painting 26 to be processed through the adsorption holes, thereby fixing the sandstone painting 26 to be processed.

[0030] In the actual operation of the present invention, when the cylinder 9 descends, the second spring telescopic rod 32 has the longest length, so the downward pressure adsorption plate 33 first contacts the sandstone painting 26 to be processed. The second spring telescopic rod 32 can provide a buffer to prevent excessive pressure from damaging the sandstone painting 26 to be processed. The downward pressure adsorption plate 33 can press down and fix the middle part of the sandstone painting 26 to be processed.

[0031] When the grinding is completed, due to the longer length of the second spring telescopic rod 32, it will rise last. Since the downward pressure on the adsorption plate 33 still plays an adsorption role, it will drive the sandstone painting 26 to be processed to rise slightly, and separate from the workbench 1 and the support plate 36, to avoid friction between the workbench 1 and the workbench 1 during rotation. At the same time, the support plate 36 loses pressure and extends upward to support the bottom end of the sandstone painting 26 to be processed. If the sandstone painting 26 to be processed falls, it can also support and buffer the sandstone painting 26 to be processed. At this time, by starting the second motor 30, the sandstone painting 26 to be processed can be rotated, which facilitates the alignment of the other side of the sandstone painting 26 to be processed with the grinding groove 12 for grinding, reducing the time of manual adjustment by personnel and improving work efficiency.

[0032] like Figure 6 As shown, further, by extending and retracting the second electric push rod 28, the downward pressure adsorption plate 33 can be moved before the sandstone painting 26 to be processed is adsorbed, thereby adjusting the position of the downward pressure adsorption plate 33 on the sandstone painting 26 to be processed. After adsorbing the sandstone painting 26 to be processed, the adsorbed sandstone painting 26 to be processed can be driven to move toward or away from the grinding groove 12 to facilitate grinding.

[0033] A lead screw 6 is rotatably connected between the two ends of the fixed base 7. A lead screw block is threadedly engaged with the outer side of the lead screw 6. The lead screw block is slidably mounted inside the fixed base 7. A fixing plate 14 is fixed to one side of the lead screw block. A drive motor is fixed to one end of the fixed base 7. The drive shaft of the drive motor is connected to one end of the lead screw 6. The drive motor can be a servo motor, which can drive the lead screw 6 to rotate forward and reverse, and the corresponding lead screw block can achieve reciprocating movement, thereby achieving reciprocating grinding of the grinding wheel 20.

[0034] like Figure 4 As shown, a fixed plate 14 is slidably provided on the movable mechanism 5, a first spring telescopic rod 16 is fixed to the bottom end of the fixed plate 14, a fixed frame 17 is fixed to the bottom end of the first spring telescopic rod 16, a lower pressing roller 18 is rotatably connected in the fixed frame 17. It should be noted that a silicone pad can be provided on the outside of the lower pressing roller 18 to act as a buffer, or a pressure sensor can be provided inside the lower pressing roller 18 to monitor the downward pressure on the sandstone painting 26 to be processed. Multiple lower pressing rollers 18 can be provided, and the multiple lower pressing rollers 18 are distributed in a straight line. The positions of the lower pressing roller 18 and the grinding wheel 20 correspond. The lower pressing roller 18 is pressed against the edge of the top of the sandstone painting 26 to be processed near the grinding groove 12.

[0035] The bottom end of the fixed plate 14 on the side away from the sandstone painting 26 to be processed is telescopically connected to an extension plate 15, and a grinding wheel 20 is provided on the extension plate 15. The lower pressure roller 18 is provided on one side of the grinding wheel 20 in the horizontal direction. The grinding wheel 20 is in contact with one end of the sandstone painting 26 to be processed. A first motor 19 is fixed on the extension plate 15, and the grinding wheel 20 is fixed on the driving shaft at the bottom of the first motor 19. After the first motor 19 is started, it can drive the grinding wheel 20 to rotate, thereby realizing the grinding operation of the sandstone painting 26 to be processed.

[0036] A third electric push rod is fixed inside the fixed plate 14 and is connected to the extension plate 15. The third electric push rod can adjust the extension length of the extension plate 15. By utilizing the retraction and extension functions of the extension plate 15, the grinding wheel 20 can always be in contact with the side of the sandstone painting 26 to be processed, thereby avoiding the phenomenon that the grinding wheel 20 cannot be in contact due to wear and tear on the side of the sandstone painting 26 to be processed after one round of grinding.

[0037] A pressure sensor is installed at the connection between the third electric push rod and the extension plate 15. This directly monitors the thrust output by the push rod, providing real-time information on the fit between the grinding wheel 20 and the sandstone painting 26 being processed, thereby preventing gaps and ensuring grinding accuracy. The pressure sensor can be connected to an integrated control switch.

[0038] At the same time, if the edge of the sandstone painting 26 to be processed in the monitoring area is relatively protruding, the sensed pressure data is relatively large, and the integrated control switch can be used to polish this area for a longer time.

[0039] A suction port 13 is provided on the inner wall of the grinding trough 12. A vacuum cleaner 2 is fixed inside the workbench 1, with a connecting pipe 3 connecting the vacuum cleaner 2 and the suction port 13. A panel 11 is installed on the top of the grinding trough 12, away from the sandstone painting 26 to be processed. The bottom of the panel 11 is fixed to the workbench 1. The vacuum cleaner 2 promptly absorbs the dust generated by the grinding process through the suction port 13, and the panel 11 blocks the dust from splashing, effectively preventing the harm of dust to the operator's health. It also reduces the contamination of other parts of the device by dust and extends the service life of the device.

[0040] After the extended end of the cylinder 9 retracts downward, it can drive the grinding wheel 20 and the lower pressure roller 18 to descend. The lower pressure roller 18 first contacts the upper surface of the sandstone painting 26 to be processed, and squeezes and fixes the sandstone painting 26 to be processed. At this time, the grinding wheel 20 continues to descend and corresponds to the side of the sandstone painting 26 to be processed. By starting the third electric push rod, the extended plate 15 is retracted, so that the grinding wheel 20 is attached to the side of the sandstone painting 26 to be processed.

[0041] like Figure 1As shown, after the driving motor is started, it can drive the screw 6 to rotate, and then make the wire block slide along the inside of the fixed seat 7, realize the lateral movement of the fixed plate 14, and cooperate with the movement of the electric slider 8 along the electric track 4, so that the grinding wheel 20 can move smoothly along the edge of the sandstone painting 26 to be processed, ensuring the uniformity of grinding.

[0042] During grinding, the lower pressing roller 18 will always follow the grinding wheel 20 and move at a constant speed, so that the lower pressing area of ​​the lower pressing roller 18 always corresponds to the grinding area of ​​the grinding wheel 20, and the downward pressure of the lower pressing roller 18 will be concentrated on the top edge of the sandstone painting 26 to be processed, reducing the gap between the bottom edge of the sandstone painting 26 to be processed and the workbench 1, and reducing the occurrence of edge collapse. At the same time, the lower pressing roller can adapt to sandstone paintings of different lengths and widths to be processed, and can adapt to sandstone paintings of different lengths without replacing adapter parts. Compared with traditional overall covering pressing, not only the scope of application is significantly broadened, but also the pressing force can be concentrated on the grinding area to prevent edge collapse and reduce edge collapse.

[0043] The elastic pressure of the first spring telescopic rod 16 can ensure that the bottom edge of the sandstone painting 26 to be processed is tightly attached to the workbench 1, reducing the generation of gaps at the grinding edges and avoiding the displacement of the sandstone painting 26 to be processed caused by the grinding vibration being transmitted to the gaps; at the same time, the lower pressure roller 18 can adaptively adjust finely during the grinding process to ensure that the pressing force is concentrated on the top edge, which not only prevents the edge of the sandstone painting 26 to be processed from breaking, but also does not affect the normal operation of the grinding wheel 20.

[0044] At the same time, when the sandstone painting 26 to be processed moves, the lower pressing roller 18 can rotate with it, thereby reducing friction damage to the surface of the sandstone painting 26 to be processed.

[0045] like Figure 8 As shown, a fixed block 21 is fixed to one side of the bottom end of the extending plate 15, and a groove 37 is opened at the bottom end of the fixed block 21 near the sandstone painting 26 to be processed, and a talc 22 is arranged in the groove 37. A telescopic spring 38 is fixed to one end of the groove 37, and an extrusion plate 39 is fixed to one end of the telescopic spring 38. The extrusion plate 39 is movably connected to one end of the talc 22, and the other end of the talc 22 is in contact with the sandstone painting 26 to be processed. The fixed block 21 moves with the extending plate 15, and the friction between the talc 22 and the sandstone painting 26 to be processed is used to remove tiny impurities on the surface of the sandstone painting 26 to be processed before grinding, thereby reducing the jamming phenomenon during the grinding process. At the same time, the lubricating effect of the talc 22 powder can reduce the wear of the grinding wheel 20 and extend its replacement cycle.

[0046] When the position of the moving mechanism 5 is fixed, the push plate 25 clamps the sandstone painting 26 to be processed from both sides under the action of the first electric push rod 24, and the lower pressure roller 18 and the lower pressure adsorption plate 33 fix the sandstone painting 26 to be processed from above. The multi-directional fixing method can effectively prevent the sandstone painting 26 to be processed from being displaced or shaken during the grinding process, ensure the accuracy of the grinding position, and avoid grinding deviation caused by unstable fixation.

[0047] It should be noted that an integrated control switch is provided, which is installed on the side of the workbench 1 in a position convenient for operation, and is connected to the control ends of the electric track 4, the first electric push rod 24, the cylinder 9, the second electric push rod 28, the second motor 30, the pump body 34, the drive motor, the first motor 19, the third electric push rod, the vacuum cleaner 2 and other mechanisms through the internal circuit.

[0048] The control switch is equipped with multiple function buttons and a display screen. These function buttons include a main power switch, an automatic operation button, and individual control buttons for each mechanism, such as the movement button for the electric slider 8, the start / stop button for the clamping mechanism, and the start / stop button for the polishing mechanism. The operator can use these buttons to centrally control each mechanism. Pressing the automatic operation button automatically completes a series of operations, such as securing, polishing, and rotating the sandstone painting 26 to be processed, according to a pre-set workflow. Pressing individual control buttons allows the corresponding mechanism to be moved or opened independently, facilitating precise operation during commissioning, maintenance, or special operating conditions. The display screen displays the operating status and parameters of each mechanism, such as pressure and polishing speed, in real time, allowing the operator to monitor the device's operation. Furthermore, a safety interlock module is built into the control switch. If a mechanism experiences an abnormal operating state, such as when a pressure sensor detects excessive pressure or a motor overload, it automatically signals the relevant mechanism to stop operation and displays a fault message on the display screen, preventing equipment damage or safety accidents caused by improper mechanism coordination. As this is prior art, a detailed description is omitted.

[0049] Working principle: The sandstone painting 26 to be processed is placed above the support plate 36, and one end of the sandstone painting 26 to be processed is aligned with the grinding groove 12. The moving mechanism 5 is driven by the electric slider 8 to move to the top of the sandstone painting 26 to be processed. At this time, the control cylinder 9 retracts downward, and then the push plate 25 is driven by the first electric push rod 24 to clamp and stabilize the two sides of the sandstone painting 26 to be processed. Since the second spring telescopic rod 32 is the longest, the downward pressure adsorption plate 33 will first contact the upper surface of the sandstone painting 26 to be processed, fix the top of the sandstone painting 26 to be processed, and squeeze the support plate 36 to retract downward, reducing the height between the sandstone painting 26 to be processed and the workbench 1.

[0050] As the cylinder 9 continues to descend, the pressing roller 18 will contact the top edge of the sandstone painting 26 to be processed, pressing down and fixing the top edge of the sandstone painting 26 to be processed to enhance the fixing strength. As the cylinder 9 continues to descend, the grinding wheel 20 corresponds to the side of the sandstone painting 26 to be processed. By controlling the third electric push rod, the grinding wheel 20 can be closely fitted to the side of the sandstone painting 26 to be processed. Finally, the driving motor and the first motor 19 are started to rotate the lead screw 6 and the grinding wheel 20 to complete the reciprocating grinding work.

[0051] When the cylinder 9 extends upward, the first electric push rod 24 retracts to release the clamping fixation on both sides, and at the same time, the grinding wheel 20, the lower pressure roller 18 and the lower pressure adsorption plate 33 are raised in sequence. When the lower pressure adsorption plate 33 rises, it can drive the adsorbed sandstone painting 26 to be processed to rise, and the rotation is completed by the drive of the second motor 30, so that the other side of the sandstone painting 26 to be processed can be replaced and polished.

Claims

1. A device for smoothing the edge of a sandstone painting, comprising a workbench (1) for placing a sandstone painting (26) to be processed, characterized in that: The workbench (1) is provided with a grinding wheel (20) for grinding the edge of the sandstone painting (26) to be processed; The grinding wheel (20) moves along the edge of the sandstone painting (26) to be processed to grind the edge of the sandstone painting (26) to be processed; A lower pressing roller (18) is further provided on the workbench (1), and the lower pressing roller (18) is used to press the edge of the upper surface of the sandstone painting (26) to be processed. The lower pressing roller (18) moves synchronously with the grinding wheel (20), and the lower pressing roller (18) is provided on one side of the grinding wheel (20) in a horizontal direction. The top of the workbench (1) is provided with an electric track (4), a moving mechanism (5) is slidably mounted on the electric track (4), a fixed plate (14) is slidably mounted on the moving mechanism (5), a third electric push rod is provided at the bottom end of the fixed plate (14) away from the sandstone painting (26) to be processed, and one end of the third electric push rod is connected to a protruding plate (15); A fixed block (21) is fixed to one side of the bottom end of the extending plate (15), a groove (37) is provided at the bottom end of the fixed block (21) close to the sandstone painting (26) to be processed, a talc (22) is arranged in the groove (37), a telescopic spring (38) is fixed to one end of the groove (37), an extrusion plate (39) is fixed to one end of the telescopic spring (38), the extrusion plate (39) is movably connected to one end of the talc (22), and the other end of the talc (22) is in contact with the sandstone painting (26) to be processed.

2. The device for smoothing the edge of a sandstone painting according to claim 1, characterized in that: A grinding groove (12) is provided on the workbench (1), and the grinding groove (12) corresponds to one end of the sandstone painting (26) to be processed; A first spring telescopic rod (16) is fixed to the bottom end of the fixed plate (14), a fixing frame (17) is fixed to the bottom end of the first spring telescopic rod (16), and the lower pressing roller (18) is rotatably connected to the fixing frame (17); A first motor (19) is fixed on the extension plate (15), and the grinding wheel (20) is fixed on a driving shaft at the bottom of the first motor (19).

3. The device for smoothing the edge of a sandstone painting according to claim 1, characterized in that: A pressure sensor is installed at the connection portion between the third electric push rod and the extension plate (15).

4. The device for smoothing the edge of a sandstone painting according to claim 1, characterized in that: Two long rails (27) are fixed on one side of the moving mechanism (5), and a moving block (29) is slidably installed between the two long rails (27). A downward-pressing adsorption disk (33) is provided at the bottom end of the moving block (29), and the downward-pressing adsorption disk (33) is pressed downward and adsorbed on the upper surface of the sandstone painting (26) to be processed. A second electric push rod (28) is fixed between the moving block (29) and the moving mechanism (5).

5. The device for smoothing the edge of a sandstone painting according to claim 4, characterized in that: A second motor (30) is fixed to the top of the moving block (29); a driving shaft at the bottom of the second motor (30) extends out of the moving block (29), and a turntable (31) is fixedly connected to the outer side of the extended end; A second spring telescopic rod (32) is fixed to the bottom end of the rotating disk (31), the top of the downward-pressing adsorption disk (33) is fixedly connected to the second spring telescopic rod (32), a pump body (34) is provided on one side of the top end of the downward-pressing adsorption disk (33), a cavity is provided inside the downward-pressing adsorption disk (33), a plurality of adsorption holes are provided at the bottom end of the downward-pressing adsorption disk (33), the adsorption holes are connected to the cavity, and the pump body (34) is connected to the cavity through a pipe.

6. The device for smoothing the edge of a sandstone painting according to claim 1, characterized in that: Two electric rails (4) are provided, and the moving mechanism (5) includes two electric sliders (8), which are respectively slidably mounted on the corresponding electric rails (4), and a cylinder (9) is fixed on the top of each of the two electric sliders (8), and a supporting block (10) is inherently provided on the top of the cylinder (9), and a fixing seat (7) is fixed on the top of the supporting block (10); A lead screw (6) is rotatably connected between the two ends of the fixed seat (7), and a lead screw (6) is threadedly matched with a lead screw block on the outer side of the lead screw (6). The lead screw block is slidably installed inside the fixed seat (7), and the fixed plate (14) is fixed to one side of the lead screw block. A drive motor is fixed to one end of the fixed seat (7), and a drive shaft of the drive motor is fixedly connected to one end of the lead screw (6).

7. The device for smoothing the edge of a sandstone painting according to claim 6, characterized in that: Auxiliary blocks (23) are fixed on the sides of the two electric sliders (8) away from the grinding groove (12), and the two auxiliary blocks (23) are respectively slidably mounted on the corresponding electric rails (4). First electric push rods (24) are fixed on the opposite sides of the two auxiliary blocks (23), and push plates (25) are fixed on the opposite ends of the two first electric push rods (24). The two push plates (25) are respectively clamped on both sides of the sandstone painting (26) to be processed.

8. The device for smoothing the edge of a sandstone painting according to claim 1, characterized in that: A telescopic slot (35) is provided at the top of the workbench (1), a third spring telescopic rod is fixed to the bottom end of the telescopic slot (35), a support plate (36) is fixed to the top end of the third spring telescopic rod, a buffer pad is fixed to the top end of the support plate (36), and the support plate (36) is arranged below the sandstone painting (26) to be processed.

9. The device for smoothing the edge of a sandstone painting according to claim 2, characterized in that: A suction port (13) is provided on the inner wall of the grinding groove (12), a vacuum cleaner (2) is fixed inside the workbench (1), and a connecting pipe (3) is connected between the vacuum cleaner (2) and the suction port (13); A side plate (11) is provided on the top of the grinding trough (12) away from the sandstone painting (26) to be processed, and the bottom end of the side plate (11) is fixed on the workbench (1).

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