Grinding device for machining

Abstract

The invention relates to the technical field of machining polishing, in particular to a polishing device for machining, which comprises a supporting table, a working table is arranged above the supporting table, first hydraulic oil cylinders are symmetrically and fixedly connected to the lower end of the working table, and the first hydraulic oil cylinders are fixedly mounted at the upper end of the supporting table; positioning baffles are symmetrically and slidably mounted at the upper end of the workbench, and second hydraulic oil cylinders are fixedly mounted on one sides of the two positioning baffles and fixedly mounted at the upper end of the workbench; the polishing device has the beneficial effects that when a workpiece is polished, the driving mechanism drives the polishing support mechanism to swing in a reciprocating mode through the butt joint mechanism, the butt joint head and the limiting round rod, the polishing support mechanism drives the polishing abrasive belt to swing in a reciprocating mode, and the polishing abrasive belt is driven by the driving mechanism to swing in a reciprocating mode; and meanwhile, the output shaft of the driving motor drives the driving belt wheel to rotate, the driving belt wheel drives the polishing abrasive belt to rotate, and the polishing abrasive belt swings in a reciprocating mode while rotating.

Description

Technical Field

[0001] This invention relates to the field of machining and grinding technology, specifically to a grinding device for machining. Background Technology

[0002] Grinding is a crucial post-processing step in machining. Grinding removes burrs, weld slag, or oxide layers from the workpiece surface, improving its smoothness, dimensional accuracy, and overall appearance. Grinding workers use tools such as grinding wheels, abrasive cloth, and sandpaper to polish or finish the surfaces of metal parts, ensuring that the surface roughness and dimensional accuracy meet design requirements.

[0003] In the field of surface grinding, existing equipment such as belt sanders and surface grinders are relatively mature and can meet the requirements of high-precision processing. However, there are still some shortcomings when grinding the edges and corners of some boxes or workpieces. Current methods for grinding the edges and corners of boxes or workpieces typically employ a single-sided, sequential grinding approach. After grinding each surface, the workpiece needs to be repositioned and clamped to grind the adjacent side. This repetitive positioning is not only time-consuming and labor-intensive, but also makes it difficult to guarantee grinding accuracy and quality due to changes in the reference datum. Furthermore, existing grinding equipment is not convenient for disassembling the grinding wheel, especially belt sanders. When the grinding belt needs to be replaced, the disassembly and replacement process is cumbersome, affecting processing efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a grinding device for machining, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a grinding device for machining, comprising a support platform, a worktable arranged above the support platform, a first hydraulic cylinder symmetrically and fixedly connected to the lower end of the worktable, the first hydraulic cylinder being fixedly installed on the upper end of the support platform, positioning baffles symmetrically and slidably installed on the upper end of the worktable, and a second hydraulic cylinder being fixedly installed on one side of each of the two positioning baffles, the second hydraulic cylinder being fixedly installed on the upper end of the worktable; An L-shaped base is fixedly installed on one side of the workbench at the upper end of the support platform. A lifting and limiting mechanism is installed at the upper end of the L-shaped base. A reciprocating grinding bracket mechanism is installed between the L-shaped base and the lifting and limiting mechanism. The upper and lower sides of the grinding bracket mechanism are connected to the L-shaped base and the lifting and limiting mechanism respectively through docking mechanisms. A grinding belt is sleeved on the outer side of the grinding bracket mechanism. An adjusting mechanism for adjusting the tension of the grinding belt is installed inside the grinding bracket mechanism. A driving mechanism for driving the grinding bracket mechanism to reciprocate is installed at the bottom of the L-shaped base. The driving mechanism is connected to the docking mechanism located below the grinding bracket mechanism.

[0006] As a further embodiment of the present invention, the upper end of the support platform is provided with a through groove, the drive mechanism is installed in the through groove, one side of the worktable extends above the through groove, and the grinding sand belt is set above the through groove.

[0007] As a further embodiment of the present invention, the lifting and limiting mechanism includes a guide plate fixedly connected to the upper end of the L-shaped base, a top seat slidably sleeved on the outer side of the guide plate, and a third hydraulic cylinder fixedly installed at the lower end of the top seat. The third hydraulic cylinder is fixedly installed on the outer side of the L-shaped base.

[0008] As a further embodiment of the present invention, the grinding support mechanism is disposed between the top seat and the L-shaped base. The grinding support mechanism includes two swing frames symmetrically distributed between the top seat and the L-shaped base, and the two swing frames are connected by multiple double-headed screws. Two driven pulleys and one driving pulley are installed between the two swing frames. The two ends of the driven pulleys are rotatably connected to the two swing frames respectively through bearings. The adjustment mechanism is installed between the two swing frames, and the driving pulley is installed on the adjustment mechanism. The abrasive belt is sleeved on the outside of the two driven pulleys and the driving pulley.

[0009] As a further embodiment of the present invention, the docking mechanism includes round shafts that are rotatably mounted on the bottom of the top seat and the bottom of the L-shaped base, respectively. A docking seat is fixedly connected to one end of each round shaft that is close to the other, and a docking groove is provided at one end of each docking seat that is close to the other. Each of the two swing frames is fixedly connected to a limiting round rod on the side away from each other. Each limiting round rod is fixedly connected to a connector at the end away from the swing frame. The connector is inserted into the adjacent mating groove.

[0010] As a further embodiment of the present invention, the bottom of the top seat and the bottom of the inner side of the L-shaped base are both fixedly connected to an arc-shaped slide rail, and the sides of the two swing frames are both fixedly installed with reinforcing frames. The ends of the reinforcing frames are fixedly installed with arc-shaped sliding plates, and the arc-shaped sliding plates are slidably connected to the adjacent arc-shaped slide rails.

[0011] As a further embodiment of the present invention, the driving mechanism includes an axe-shaped gear rotatably mounted on the bottom of the L-shaped base. The axe-shaped gear is fixedly connected to an adjacent round shaft, and a driving gear meshes with the side of the axe-shaped gear. The driving gear is driven by the motor shaft of a servo motor fixedly mounted on the bottom of the L-shaped base.

[0012] As a further embodiment of the present invention, the adjusting mechanism includes a vertical plate fixedly installed between two swing frames, a tensioning mechanism installed on the side of the vertical plate, and a rotary transmission mechanism for controlling the movement of the tensioning mechanism. A circular hole is provided on the side of the vertical plate. The tensioning mechanism includes an internally threaded sleeve rotatably installed in the circular hole. A limit ring and a worm gear are respectively fixedly sleeved at both ends of the internally threaded sleeve. The rotary transmission mechanism is installed on the side of the worm gear. A threaded rod is installed through the inner side of the internal threaded sleeve. One end of the threaded rod is fixedly connected to a U-shaped frame. T-shaped sliders are symmetrically fixedly connected to the upper and lower sides of the U-shaped frame. Slide grooves are opened on the sides of both swing frames. The T-shaped sliders are slidably connected to the adjacent slide grooves. A reinforcing plate is fixedly connected to the side of the U-shaped frame near the vertical plate. The reinforcing plate penetrates the vertical plate and is slidably connected to the vertical plate. The drive pulley is rotatably installed on the inner side of the U-shaped frame through a bearing. A drive motor is fixedly installed on one of the T-shaped sliders. The output shaft of the drive motor is fixedly connected to the drive pulley.

[0013] As a further embodiment of the present invention, the rotary transmission mechanism includes a worm gear rotatably mounted between two swing frames via bearings. The worm gear meshes with a worm wheel, and the upper end of the worm gear passes upward through the swing frame and is fixedly connected to a regular polygonal column. A locking mechanism for limiting the movement of the regular polygonal column is installed on its outer side.

[0014] As a further embodiment of the present invention, the locking mechanism includes an annular plate sleeved on the outside of a regular polygonal column. The annular plate is fixedly connected to an adjacent swing frame. The upper surface of the annular plate has multiple slots arranged in a ring. The outer side of the regular polygonal column is sleeved with an upper baffle, a locking spring, and a movable knob in sequence from top to bottom. The upper baffle is fixedly connected to the regular polygonal column. The upper end of the movable knob has a regular polygonal groove that fits the regular polygonal column. The regular polygonal groove is slidably connected to the regular polygonal column. The two ends of the locking spring abut against the upper baffle and the movable knob, respectively. The lower end of the movable knob is fixedly connected with multiple locking blocks in a ring array. The locking blocks engage with adjacent slots.

[0015] The beneficial effects of this invention are: 1. When grinding a workpiece, the drive mechanism drives the grinding support mechanism to reciprocate through the docking mechanism, the joint, and the limiting rod. The grinding support mechanism drives the grinding belt to reciprocate. At the same time, the output shaft of the drive motor drives the drive pulley to rotate, which in turn drives the grinding belt to rotate. This causes the grinding belt to rotate and reciprocate, thus performing the grinding operation. The grinding belt can grind two adjacent sides of the workpiece's corner or edge at once, greatly improving grinding efficiency. Moreover, only one positioning of the workpiece is required, ensuring the accuracy and quality of the grinding.

[0016] 2. When the abrasive belt becomes loose after prolonged or repeated grinding operations, the locking mechanism releases the lock on the polygonal column. The locking mechanism drives the polygonal column to rotate, which in turn drives the worm gear to rotate. This causes the tensioning mechanism to drive the drive pulley to push the abrasive belt outward, thus tightening the abrasive belt. This completes the tension adjustment of the abrasive belt, enabling it to continuously and precisely grind the workpiece.

[0017] 3. When the sanding belt needs to be replaced, first move the top seat upward by the inner rod of the third hydraulic cylinder, moving the sanding support mechanism out from between the top seat and the L-shaped base. Then pull the locking mechanism upward and rotate it in the opposite direction. The locking mechanism drives the regular polygonal column and worm gear to rotate, causing the tensioning mechanism to move the drive pulley closer to the vertical plate, so that the drive pulley is retracted into the sanding support mechanism. At this time, the drive pulley no longer pushes the sanding belt to tighten, so the sanding belt can be removed from the sanding support mechanism and the driven pulley. Then, a new sanding belt can be installed. The disassembly and installation of the sanding belt is simple and convenient, greatly improving work efficiency. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural view of the grinding device for machining according to the present invention; Figure 2 This is a side sectional view of the grinding device for machining according to the present invention; Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A in the middle; Figure 4 This is an exploded view of the L-shaped base, top seat, grinding support mechanism, and drive mechanism of the present invention; Figure 5 This is a cross-sectional view of the grinding support mechanism and locking mechanism of the present invention; Figure 6 for Figure 5 Enlarged schematic diagram of the structure at point B; Figure 7 This is an exploded view of the grinding support mechanism, grinding belt, and adjustment mechanism of the present invention. Figure 8 This is an exploded view of the drive pulley and adjustment mechanism structure of the present invention; Figure 9 This is an exploded view of the rotary transmission mechanism and locking mechanism of the present invention.

[0019] In the diagram: 1. Support platform; 11. Workbench; 12. First hydraulic cylinder; 13. Positioning baffle; 14. Second hydraulic cylinder; 15. Through groove; 2. L-shaped base; 21. Guide plate; 22. Top seat; 23. Third hydraulic cylinder; 3. Swing frame; 31. Slide groove; 32. Double-ended screw; 33. Grinding belt; 34. Driven pulley; 35. Limiting rod; 36. Connecting joint; 4. Vertical plate; 41. Circular hole; 42. C-shaped frame; 43. T-shaped slider; 44. Addition... 45. Reinforcing plate; 5. Drive pulley; 6. Internal threaded sleeve; 7. Limiting ring; 8. Worm gear; 9. Threaded rod; 10. Worm; 11. Round shaft; 12. Connecting seat; 13. Connecting groove; 14. Axe-shaped gear; 15. Drive gear; 16. Arc-shaped slide rail; 17. Reinforcing frame; 18. Arc-shaped sliding plate; 19. Regular polygonal column; 20. Annular plate; 21. Slot; 32. Upper baffle; 43. Locking spring; 54. Movable knob; 65. Regular polygonal groove; 76. Locking block. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figures 1 to 9 The present invention provides a technical solution: a grinding device for machining, including a support platform 1, a worktable 11 arranged above the support platform 1, a first hydraulic cylinder 12 symmetrically fixedly connected to the lower end of the worktable 11, the first hydraulic cylinder 12 fixedly installed on the upper end of the support platform 1, a controller installed on the upper end of the support platform 1 to control the operation of the grinding device, positioning baffles 13 symmetrically slidably installed on the upper end of the worktable 11, the included angle formed between the two positioning baffles 13 is 90 degrees, a second hydraulic cylinder 14 fixedly installed on one side of each of the two positioning baffles 13, the second hydraulic cylinder 14 fixedly installed on the upper end of the worktable 11, guide grooves symmetrically opened on the upper end of the worktable 11, a guide movable block fixedly connected to the lower end of the positioning baffle 13, the guide movable block slidably connected to the guide groove, so that the positioning baffle 13 can move stably; Multiple hydraulic cylinders are controlled by a hydraulic system to control the direction and flow of fluid, ensuring that the multiple hydraulic cylinders expand and contract with the same speed and force. The movement status of each cylinder is monitored in real time by displacement sensors and control system, and adjustments are made as needed to maintain synchronization. The control system receives feedback signals from displacement sensors, processes them through algorithms, and adjusts the opening of control valve group to achieve precise synchronization of displacement between hydraulic cylinders. It also adjusts the movement commands of multiple hydraulic cylinders to achieve synchronous extension and retraction of multiple hydraulic cylinders. In accordance with the above method, multiple first hydraulic cylinders 12 can be moved synchronously, and two second hydraulic cylinders 14 can also be moved synchronously. The extension and retraction of the inner rod of the first hydraulic cylinder 12 drives the worktable 11 to move up and down, thereby enabling the grinding of workpieces of different heights.

[0022] An L-shaped base 2 is fixedly installed on one side of the workbench 11 at the upper end of the support platform 1. A lifting limit mechanism is installed at the upper end of the L-shaped base 2. A reciprocating grinding bracket mechanism is installed between the L-shaped base 2 and the lifting limit mechanism. The upper and lower sides of the grinding bracket mechanism are connected to the L-shaped base 2 and the lifting limit mechanism respectively through docking mechanisms. A grinding belt 33 is sleeved on the outer side of the grinding bracket mechanism. An adjustment mechanism for adjusting the tension of the grinding belt 33 is installed inside the grinding bracket mechanism. A drive mechanism for driving the grinding bracket mechanism to reciprocate is installed at the bottom of the L-shaped base 2. The drive mechanism is connected to the docking mechanism located below the grinding bracket mechanism.

[0023] Please see Figure 2 The upper end of the support platform 1 is provided with a through groove 15. The drive mechanism is installed in the through groove 15. One side of the worktable 11 extends to the top of the through groove 15. The grinding belt 33 is set above the through groove 15. When the grinding belt 33 grinds the corners or edges of the workpiece, the worn debris and powder fall down through the through groove 15 for collection.

[0024] Please see Figure 1 , Figure 2 and Figure 4 The lifting and limiting mechanism includes a guide plate 21 fixedly connected to the upper end of the L-shaped base 2. A top seat 22 is slidably sleeved on the outer side of the guide plate 21. A third hydraulic cylinder 23 is fixedly installed at the lower end of the top seat 22. The third hydraulic cylinder 23 is fixedly installed on the outer side of the L-shaped base 2.

[0025] The extension and retraction of the inner rod of the third hydraulic cylinder 23 causes the top seat 22 to slide up and down along the guide plate 21, thereby enabling the top seat 22 to move stably.

[0026] Please see Figure 2 , Figure 4 , Figure 5 and Figure 7The grinding support mechanism is set between the top seat 22 and the L-shaped base 2. The grinding support mechanism includes two swing frames 3 symmetrically distributed between the top seat 22 and the L-shaped base 2. The two swing frames 3 are connected by multiple double-ended screws 32. The side of the swing frame 3 is provided with mounting holes. The threaded end of the double-ended screw 32 passes through the mounting hole and is connected to the nut, so that one end of the nut is fastened to the side of the swing frame 3, thereby fixing the two ends of the double-ended screw 32 to the two swing frames 3 respectively. Two driven pulleys 34 and one drive pulley 45 are installed between the two swing frames 3. The two driven pulleys 34 and one drive pulley 45 are arranged in a triangle. The swing frame 3 is a triangular plate. The two driven pulleys 34 and one drive pulley 45 are respectively installed at one end corner of the swing frame 3. The two ends of the driven pulleys 34 are rotatably connected to the two swing frames 3 through bearings. An adjustment mechanism is installed between the two swing frames 3. The drive pulley 45 is installed on the adjustment mechanism. The sanding belt 33 is sleeved on the outside of the two driven pulleys 34 and one drive pulley 45.

[0027] The grinding belt 33 is supported and positioned by two driven pulleys 34 and one drive pulley 45, so that the grinding belt 33 is triangularly distributed. Initially, one side of the grinding belt 33 faces the worktable 11. During operation, the sides of the two driven pulleys 34 and one drive pulley 45 extend to the outside of the grinding support mechanism, so that the grinding belt 33 is on the outside of the grinding support mechanism, preventing the grinding support mechanism from obstructing the grinding belt 33 when it grinds the workpiece.

[0028] Please see Figures 2 to 4 The docking mechanism includes a round shaft 6 that is rotatably installed at the bottom of the top seat 22 and the L-shaped base 2 respectively. The round shaft 6 is rotatably connected to the top seat 22 and the L-shaped base 2 respectively through bearings. A docking seat 61 is fixedly connected to the end of the two round shafts 6 that are close to each other. A docking groove 62 is opened at the end of the two docking seats 61 that are close to each other. Each of the two swing frames 3 has a limiting rod 35 fixedly connected to the side away from each other. Each limiting rod 35 has a connector 36 fixedly connected to the end away from the swing frame 3. The connector 36 is inserted into the adjacent mating groove 62.

[0029] When the grinding support mechanism needs to be disassembled, the top seat 22 is moved upward. The top seat 22 drives a docking seat 61 to move upward through the round shaft 6 on it, so that the docking seat 61 is away from the docking joint 36 above the grinding support mechanism. At this point, push the grinding support mechanism upward to separate the mating joint 36 below the grinding support mechanism from the mating seat 61 on the L-shaped base 2, thereby separating the grinding support mechanism from the two mating mechanisms. This allows the grinding support mechanism to be moved out from between the top seat 22 and the L-shaped base 2, completing the disassembly.

[0030] Please see Figure 4 The bottom of the top seat 22 and the bottom of the inner side of the L-shaped base 2 are both fixedly connected to the arc-shaped slide rail 7. The two arc-shaped slide rails 7 are symmetrically distributed vertically. The sides of the two swing frames 3 are fixedly installed with reinforcing frames 71. The ends of the reinforcing frames 71 are fixedly installed with arc-shaped sliding plates 72. The two arc-shaped sliding plates 72 are symmetrically distributed vertically. The arc-shaped sliding plates 72 are slidably connected to the adjacent arc-shaped slide rail 7. The arc-shaped slide rail 7 and the arc-shaped sliding plates 72 rotate around the axis of the circular shaft 6.

[0031] When the grinding support mechanism reciprocates, it rotates and swings around the axis of the circular shaft 6; at this time, the limiting circular rod 35, the mating joint 36, the mating seat 61 and the circular shaft 6 all rotate synchronously.

[0032] When the grinding support mechanism reciprocates, the reinforcing frame 71 drives the arc-shaped sliding plate 72 to swing synchronously. At this time, the arc-shaped sliding plate 72 slides along the arc-shaped slide rail 7. Through the cooperation of the arc-shaped slide rail 7 and the arc-shaped sliding plate 72, the grinding support mechanism can reciprocate stably.

[0033] Please see Figure 2 and Figure 4 The drive mechanism includes an axe-shaped gear 63 rotatably mounted on the bottom of the L-shaped base 2. The axe-shaped gear 63 is fixedly connected to an adjacent round shaft 6. The lower end of the round shaft 6 mounted on the L-shaped base 2 extends downward. The axe-shaped gear 63 is fixedly sleeved on the lower end of the round shaft 6. A drive gear 64 meshes with the side of the axe-shaped gear 63. The drive gear 64 is driven by the motor shaft of a servo motor fixedly mounted on the bottom of the L-shaped base 2. A side plate is fixedly connected to the bottom of the L-shaped base 2. The servo motor is mounted on the side plate. The motor shaft of the servo motor is connected to the drive gear 64 through a coupling. The drive gear 64 is rotatably mounted on the bottom of the L-shaped base 2.

[0034] The servo motor's shaft rotates clockwise by a certain angle and then counterclockwise by a certain angle, repeating this process. This causes the drive gear 64 to drive the axe-shaped gear 63 to swing back and forth. The axe-shaped gear 63 then drives the circular shaft 6 above it to swing back and forth. The circular shaft 6, through its mating seat 61, drives the adjacent mating joint 36 to swing back and forth. The mating joint 36, through its limiting rod 35, drives the grinding support mechanism to swing back and forth. The grinding support mechanism drives the limiting rod 35, the mating joint 36, the mating seat 61, and the circular shaft 6 above it to swing back and forth. At this time, the circular shaft 6 above the grinding support mechanism rotates along the top seat 22.

[0035] Please see Figure 2 , Figure 3 , Figure 5 , Figure 7 and Figure 8The adjustment mechanism includes a vertical plate 4 fixedly installed between two swing frames 3, a tensioning mechanism installed on the side of the vertical plate 4, and a rotary transmission mechanism for controlling the movement of the tensioning mechanism. A circular hole 41 is opened on the side of the vertical plate 4. The tensioning mechanism includes an internal threaded sleeve 5 rotatably installed in the circular hole 41. Limiting rings 51 and worm gears 52 are fixedly sleeved at both ends of the internal threaded sleeve 5. The limiting rings 51 and worm gears 52 are rotatably contacted with the two sides of the vertical plate 4. The internal threaded sleeve 5 is restricted by the cooperation of the limiting rings 51 and worm gears 52, so that the internal threaded sleeve 5 can only rotate along the circular hole 41. The rotary transmission mechanism is installed on the side of the worm gears 52. A threaded rod 53 is installed through the inner side of the internal threaded sleeve 5. One end of the threaded rod 53 is fixedly connected to a U-shaped frame 42. T-shaped sliders 43 are symmetrically fixedly connected to the upper and lower sides of the U-shaped frame 42. Slide grooves 31 are opened on the sides of both swing frames 3. The T-shaped sliders 43 are slidably connected to the adjacent slide grooves 31. A reinforcing plate 44 is fixedly connected to the side of the U-shaped frame 42 near the vertical plate 4. The reinforcing plate 44 passes through the vertical plate 4 and is slidably connected to the vertical plate 4. The drive pulley 45 is rotatably installed on the inner side of the U-shaped frame 42 through a bearing. A drive motor is fixedly installed on one of the T-shaped sliders 43. The output shaft of the drive motor is fixedly connected to the drive pulley 45.

[0036] The output shaft of the drive motor drives the drive pulley 45 to rotate, which in turn drives the abrasive belt 33 to rotate. The abrasive belt 33 drives the two driven pulleys 34 on its inner side to rotate synchronously, thereby enabling the abrasive belt 33 to perform abrasive work.

[0037] When it is necessary to adjust the tension of the abrasive belt 33, the worm gear 52 drives the inner threaded sleeve 5 to rotate, the inner threaded sleeve 5 pushes the threaded rod 53 on its inner side to move, the threaded rod 53 drives the convex frame 42 to move, the convex frame 42 drives the reinforcing plate 44 to slide along the vertical plate 4, so that the convex frame 42 can stably drive the drive pulley 45 to move; by moving the drive pulley 45 away from the vertical plate 4, the drive pulley 45 pushes the abrasive belt 33 outward, so that the abrasive belt 33 is tightened, thereby completing the tension adjustment of the abrasive belt 33. During the grinding process, the sanding belt 33 may undergo slight deformation or fiber breakage under stress, reducing its tensile strength and causing uneven tension distribution. This results in the sanding belt 33 being unable to maintain its original tightness, leading to slackness and making it unable to grind normally. At this time, the tension of the abrasive belt 33 is adjusted by the adjustment mechanism to keep the abrasive belt 33 taut and prevent it from becoming loose and unable to perform normal abrasive work.

[0038] When it is necessary to replace the sanding belt 33, first disassemble the sanding bracket mechanism, then move the drive pulley 45 close to the vertical plate 4, so that the drive pulley 45 is retracted into the sanding bracket mechanism. At this time, the drive pulley 45 no longer pushes the sanding belt 33 to tighten, so that the sanding belt 33 can be removed from the sanding bracket mechanism and the driven pulley 34. Then, put on a new sanding belt 33. At this time, move the drive pulley 45 away from the vertical plate 4, so that the drive pulley 45 moves outward until the drive pulley 45 tightens the sanding belt 33, thus completing the replacement of the sanding belt 33. Then, install the sanding bracket mechanism between the top seat 22 and the L-shaped base 2, and at the same time, make the arc-shaped slide rail 7 and the arc-shaped slide plate 72 accurately align.

[0039] Please see Figure 5 , Figure 6 , Figure 8 and Figure 9 The rotary transmission mechanism includes a worm 54 rotatably mounted between two swing frames 3 via bearings. The worm 54 meshes with a worm wheel 52. The upper end of the worm 54 passes upward through the swing frame 3 and is fixedly connected to a regular polygonal column 8. A locking mechanism for limiting the movement of the regular polygonal column 8 is installed on the outside of the column.

[0040] The rotation of the regular polygonal column 8 drives the worm gear 54 to rotate, which in turn drives the worm wheel 52 to rotate, thereby moving the tensioning mechanism. The tensioning mechanism then drives the drive pulley 45 to move for adjustment.

[0041] Please see Figure 5 , Figure 6 , Figure 8 and Figure 9 The locking mechanism includes an annular plate 81 sleeved on the outside of the regular polygonal column 8. The annular plate 81 is fixedly connected to the adjacent swing frame 3, and the annular plate 81 does not contact the regular polygonal column 8. The upper surface of the annular plate 81 has multiple slots 82 arranged in a ring. The outer side of the regular polygonal column 8 is sleeved with an upper baffle 83, a locking spring 84, and a movable knob 85 from top to bottom. The upper baffle 83 is fixedly connected to the regular polygonal column 8. The upper end of the movable knob 85 has a regular polygonal groove 86 that is adapted to the regular polygonal column 8. The regular polygonal groove 86 is slidably connected to the regular polygonal column 8. The two ends of the locking spring 84 abut against the upper baffle 83 and the movable knob 85 respectively, and the locking spring 84 applies a downward elastic force to the movable knob 85. The lower end of the movable knob 85 is fixedly connected with multiple locking blocks 87 in a ring array. The locking blocks 87 engage with the adjacent slots 82.

[0042] The locking mechanism locks the regular polygonal column 8 to prevent the worm gear 54 from rotating during the grinding process, which would cause the tensioning mechanism to move and affect the tension of the grinding belt 33.

[0043] When it is necessary to rotate the regular polygonal column 8, pull the movable knob 85 upward along the regular polygonal column 8. When the movable knob 85 moves upward, it compresses the locking spring 84. At the same time, the movable knob 85 drives the locking block 87 to move out of the slot 82. At this time, rotate the movable knob 85 and the upper baffle 83 to drive the regular polygonal column 8 to rotate. Rotate the regular polygonal column 8 in the direction required, so that the worm 54 drives the worm wheel 52 to rotate, thereby driving the tensioning mechanism to move. When the adjustment is complete and the movable knob 85 is released, the movable knob 85 moves downward along the regular polygonal column 8 under the action of the locking spring 84. The movable knob 85 drives the locking block 87 to engage in the slot 82. At this time, the movable knob 85 can no longer rotate, thus locking the regular polygonal column 8.

[0044] Working principle: When grinding the workpiece, the servo motor is started, which drives the docking mechanism to swing back and forth through the drive mechanism. The docking mechanism drives the grinding support mechanism to swing back and forth through the docking joint 36 and the limiting round rod 35. The grinding support mechanism drives the two driven pulleys 34, the adjustment mechanism and the drive pulley 45 to swing back and forth synchronously. The two driven pulleys 34 and the drive pulley 45 drive the grinding belt 33 to swing back and forth. At this time, the grinding support mechanism drives the grinding belt 33 to swing back and forth around the axis of the round shaft 6. At the same time, the drive motor is started, and the output shaft of the drive motor drives the drive pulley 45 to rotate. The drive pulley 45 drives the abrasive belt 33 to rotate, and the abrasive belt 33 drives the two driven pulleys 34 on its inner side to rotate synchronously, so that the abrasive belt 33 can rotate stably. At this time, the workpiece is clamped between the two positioning baffles 13, so that the corner or edge of the workpiece to be ground is close to the grinding belt 33. The grinding belt 33 rotates and swings back and forth to perform the grinding operation. The grinding belt 33 can grind two adjacent sides of the corner or edge of the workpiece at one time, which greatly improves the grinding efficiency. Moreover, only the workpiece needs to be positioned once, ensuring the accuracy and quality of grinding.

[0045] When the abrasive belt 33 becomes loose after prolonged or repeated abrasion, pull the movable knob 85 upwards along the polygonal column 8 to release the locking mechanism. Then rotate the movable knob 85 and the upper baffle 83, thereby rotating the polygonal column 8. The polygonal column 8 drives the worm gear 54 to rotate, which in turn drives the worm wheel 52. The worm wheel 52 drives the internal threaded sleeve 5 to rotate, which in turn pushes the threaded rod 53 on its inner side to move. The threaded rod 53 drives the U-shaped frame 42 to move, and the U-shaped frame 42 drives the drive pulley 45 to move. The drive pulley 45 pushes the abrasive belt 33 outward, tightening it and adjusting its tension. This allows the abrasive belt 33 to continuously and precisely grind the workpiece. After adjustment, the knob 85 is released, and the locking mechanism continues to lock the polygonal column 8 under the action of the locking spring 84. This prevents the polygonal column 8 and worm gear 54 from rotating during the grinding process, ensuring the tension of the abrasive belt 33 and enabling stable grinding operations.

[0046] When the grinding belt 33 needs to be replaced, the inner rod of the third hydraulic cylinder 23 first drives the top seat 22 to move upward. The top seat 22 drives the docking mechanism and the arc-shaped slide rail 7 on it to move upward, so that the docking mechanism is separated from the docking joint 36 above the grinding support mechanism, and the arc-shaped slide rail 7 is separated from the adjacent arc-shaped slide plate 72. Then, the grinding support mechanism is manually lifted upward, so that the docking joint 36 below the grinding support mechanism is separated from the docking mechanism on the L-shaped base 2, and the arc-shaped slide plate 72 below the grinding support mechanism is separated from the adjacent arc-shaped slide rail 7, thereby moving the grinding support mechanism out from between the top seat 22 and the L-shaped base 2. Pull the locking mechanism upwards again, and rotate it in the opposite direction. The locking mechanism drives the polygonal column 8 and the worm gear 54 to rotate, causing the tensioning mechanism to move the drive pulley 45 closer to the vertical plate 4. This causes the drive pulley 45 to retract into the grinding support mechanism. At this point, the drive pulley 45 no longer pushes the grinding belt 33 to tighten, allowing the grinding belt 33 to be removed from the grinding support mechanism and the driven pulley 34. Then, attach a new grinding belt 33 to the outside of the grinding support mechanism and the driven pulley 34. Pull the locking mechanism upwards again, and the locking mechanism drives the polygonal column 8 and the worm gear 54 to rotate. This causes the tensioning mechanism to move the drive pulley 45 away from the vertical plate 4, causing the drive pulley 45 to push the grinding belt 33 outwards and tighten it. Next, the grinding support mechanism is installed between the L-shaped base 2 and the top seat 22, so that the docking mechanism below the grinding support mechanism docks with the adjacent docking joint 36, and at the same time, the arc-shaped slide plate 72 below the grinding support mechanism engages with the adjacent arc-shaped slide rail 7; then the inner rod of the third hydraulic cylinder 23 drives the top seat 22 to move downward, and the top seat 22 drives the docking mechanism and the arc-shaped slide rail 7 on it to move downward, so that the docking mechanism is inserted with the docking joint 36 above the grinding support mechanism, and the arc-shaped slide rail 7 engages with the adjacent arc-shaped slide plate 72, thereby completing the replacement of the grinding belt 33.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A polishing device for machining, comprising a support table (1), a workbench (11) is arranged above the support table (1), the lower end of the workbench (11) is fixedly connected with a first hydraulic oil cylinder (12), and the first hydraulic oil cylinder (12) is fixedly installed at the upper end of the support table (1), characterized in that: The upper end of the workbench (11) is symmetrically and slidably equipped with positioning baffles (13), and a second hydraulic cylinder (14) is fixedly installed on one side of each of the two positioning baffles (13). The second hydraulic cylinder (14) is fixedly installed on the upper end of the workbench (11). An L-shaped base (2) is fixedly installed on one side of the workbench (11) at the upper end of the support platform (1). A lifting limit mechanism is installed at the upper end of the L-shaped base (2). A reciprocating grinding bracket mechanism is installed between the L-shaped base (2) and the lifting limit mechanism. The upper and lower sides of the grinding bracket mechanism are connected to the L-shaped base (2) and the lifting limit mechanism respectively through a docking mechanism. A grinding belt (33) is sleeved on the outer side of the grinding bracket mechanism. An adjustment mechanism for adjusting the tension of the grinding belt (33) is installed inside the grinding bracket mechanism. A driving mechanism for driving the grinding bracket mechanism to reciprocate is installed at the bottom of the L-shaped base (2). The driving mechanism is connected to the docking mechanism located below the grinding bracket mechanism.

2. The polishing apparatus for machining according to claim 1, characterized by: The upper end of the support platform (1) is provided with a through groove (15), the drive mechanism is installed in the through groove (15), one side of the worktable (11) extends to the top of the through groove (15), and the grinding sand belt (33) is set above the through groove (15).

3. The polishing apparatus for machining according to claim 1, characterized by: The lifting and limiting mechanism includes a guide plate (21) fixedly connected to the upper end of the L-shaped base (2). A top seat (22) is slidably sleeved on the outer side of the guide plate (21). A third hydraulic cylinder (23) is fixedly installed at the lower end of the top seat (22). The third hydraulic cylinder (23) is fixedly installed on the outer side of the L-shaped base (2).

4. The abrading device of claim 3, wherein: The grinding support mechanism is set between the top seat (22) and the L-shaped base (2). The grinding support mechanism includes two swing frames (3) symmetrically distributed between the top seat (22) and the L-shaped base (2). The two swing frames (3) are connected by multiple double-headed screws (32). Two driven pulleys (34) and one drive pulley (45) are installed between the two swing frames (3). The two ends of the driven pulleys (34) are rotatably connected to the two swing frames (3) respectively through bearings. The adjustment mechanism is installed between the two swing frames (3). The drive pulley (45) is installed on the adjustment mechanism. The abrasive belt (33) is sleeved on the outside of the two driven pulleys (34) and the drive pulley (45).

5. The abrading device of claim 4, wherein: The docking mechanism includes round shafts (6) that are rotatably installed on the bottom of the top seat (22) and the L-shaped base (2), respectively. The two round shafts (6) are fixedly connected to docking seats (61) at their close ends, and docking grooves (62) are opened at their close ends. Each of the two swing frames (3) is fixedly connected to a limiting round rod (35) on the side away from each other. Each limiting round rod (35) is fixedly connected to a connector (36) at the end away from the swing frame (3). The connector (36) is inserted into the adjacent docking groove (62).

6. A grinding device for machining according to claim 4, characterized in that: The bottom of the top seat (22) and the bottom of the inner side of the L-shaped base (2) are both fixedly connected to the arc-shaped slide rail (7). The sides of the two swing frames (3) are both fixedly installed with reinforcing frames (71). The ends of the reinforcing frames (71) are fixedly installed with arc-shaped sliding plates (72). The arc-shaped sliding plates (72) are slidably connected to the adjacent arc-shaped slide rail (7).

7. A grinding device for machining according to claim 5, characterized in that: The drive mechanism includes an axe-shaped gear (63) rotatably mounted on the bottom of the L-shaped base (2). The axe-shaped gear (63) is fixedly connected to an adjacent round shaft (6). A drive gear (64) meshes with the side of the axe-shaped gear (63). The drive gear (64) is driven by the motor shaft of a servo motor fixedly mounted on the bottom of the L-shaped base (2).

8. A grinding device for machining according to claim 4, characterized in that: The adjustment mechanism includes a vertical plate (4) fixedly installed between two swing frames (3), a tensioning mechanism installed on the side of the vertical plate (4), and a rotary transmission mechanism for controlling the movement of the tensioning mechanism. A circular hole (41) is provided on the side of the vertical plate (4). The tensioning mechanism includes an internal threaded sleeve (5) rotatably installed in the circular hole (41). The two ends of the internal threaded sleeve (5) are respectively fixedly sleeved with a limit ring (51) and a worm gear (52). The rotary transmission mechanism is installed on the side of the worm gear (52). A threaded rod (53) is installed through the inner side of the internal threaded sleeve (5). One end of the threaded rod (53) is fixedly connected to a U-shaped frame (42). T-shaped sliders (43) are symmetrically fixedly connected to the upper and lower sides of the U-shaped frame (42). Slide grooves (31) are opened on the sides of the two swing frames (3). The T-shaped sliders (43) are slidably connected to the adjacent slide grooves (31). A reinforcing plate (44) is fixedly connected to the side of the U-shaped frame (42) near the vertical plate (4). The reinforcing plate (44) penetrates the vertical plate (4). The reinforcing plate (44) is slidably connected to the vertical plate (4). The drive pulley (45) is rotatably installed on the inner side of the U-shaped frame (42) through a bearing. A drive motor is fixedly installed on one of the T-shaped sliders (43). The output shaft of the drive motor is fixedly connected to the drive pulley (45).

9. A grinding device for machining according to claim 8, characterized in that: The rotary transmission mechanism includes a worm (54) that is rotatably mounted between two swing frames (3) via bearings. The worm (54) meshes with a worm wheel (52). The upper end of the worm (54) passes upward through the swing frame (3) and is fixedly connected to a regular polygonal column (8). A locking mechanism for limiting the movement of the regular polygonal column (8) is installed on the outside of the column.

10. A grinding device for machining according to claim 9, characterized in that: The locking mechanism includes an annular plate (81) sleeved on the outside of the regular polygonal column (8). The annular plate (81) is fixedly connected to the adjacent swing frame (3). The upper surface of the annular plate (81) is provided with multiple slots (82) arranged in a ring. The outer side of the regular polygonal column (8) is provided with an upper baffle (83), a locking spring (84) and a movable knob (85) in sequence from top to bottom. The upper baffle (83) is fixedly connected to the regular polygonal column (8). The upper end of the movable knob (85) is provided with a regular polygonal groove (86) adapted to the regular polygonal column (8). The regular polygonal groove (86) is slidably connected to the regular polygonal column (8). The two ends of the locking spring (84) abut against the upper baffle (83) and the movable knob (85) respectively. The lower end of the movable knob (85) is fixedly connected with multiple locking blocks (87) in a ring array. The locking blocks (87) engage with the adjacent slots (82).

Images