Saw tooth inner angle arc polishing device

Abstract

This invention provides a saw blade inner corner rounding grinding device, comprising a work platform, a mounting frame, a grinding device, a tooth-shifting assembly, a movable clamping plate, and a fixed clamping plate. A feeding hydraulic rod is mounted on the mounting frame, with its movable end connected to a bearing block. A lifting block is slidably mounted on the bearing block, and a mounting rod is mounted on the lifting block. The tooth-shifting assembly is slidably mounted on the mounting frame. When the saw blade is installed, it is positioned with the tooth-shifting assembly. Then, the feeding hydraulic rod moves the bearing block to the processing position. The movable and fixed clamping plates clamp the saw blade. The grinding device drives the grinding wheel to descend and rotate, grinding the inner corner rounding of the saw blade. After grinding one tooth, the tooth-shifting assembly drives the saw blade to rotate at a set angle to grind the next tooth. All saw blade teeth can be ground at once, making the operation simple and highly efficient.

Description

Technical Field

[0001] This invention relates to the field of saw blade processing equipment, and more particularly to a saw tooth inner corner rounding grinding equipment. Background Technology

[0002] A saw blade is a thin, circular cutting tool used to cut solid materials. It typically has multiple teeth. During saw blade production, some require rounding the inner angles of the teeth to extend the blade's lifespan. Existing devices for rounding the inner angles of saw blade teeth involve manually positioning the saw blade at a set machining angle. After machining each tooth, the saw blade must be disassembled and repositioned for rounding all the inner angles. This process is cumbersome and inefficient. Using a computer-controlled, high-precision motor rotation mechanism to control the saw blade's rotation would be extremely expensive and require highly skilled operators.

[0003] Therefore, it is necessary to provide a new sawtooth inner corner rounding grinding device to solve the above-mentioned technical problems. Summary of the Invention

[0004] This invention provides a saw tooth inner corner rounding grinding device to solve the technical problems of existing saw tooth inner corner rounding grinding devices, which either require manual disassembly and repositioning of the saw blade for grinding, resulting in frequent operation and low efficiency, or use a computer-controlled high-precision motor rotation structure to control the rotation of the saw blade, resulting in high cost and very high technical requirements for operators.

[0005] The present invention provides a sawtooth inner corner rounding grinding device comprising:

[0006] The work platform has a mounting plate fixedly installed on it.

[0007] A mounting bracket is provided on one side of the mounting plate. A feeding hydraulic rod is fixedly installed at one end of the mounting bracket. A bearing block is connected to the movable end of the feeding hydraulic rod. A lifting block is slidably installed on the bearing block. A mounting rod for mounting the saw blade is provided on one side of the lifting block.

[0008] A grinding device is disposed on one side of the mounting plate and located at the top of the mounting frame. The output end of the grinding device is equipped with a grinding wheel for grinding the inner corner radius of the saw blade.

[0009] The tooth-shifting assembly is slidably mounted on the mounting frame and connected to the bearing block via a connecting frame. The tooth-shifting assembly is used to drive the saw blade to rotate at a set angle so that the grinding device can grind the multiple inner corner arcs of the saw blade one by one.

[0010] The movable clamping plate and the fixed clamping plate are used to clamp the saw blade during grinding.

[0011] In this invention, the tooth-shifting assembly is driven by a linear drive mechanism. A drive block is fixedly connected to the movable end of the linear drive mechanism, and a connecting block is movably connected to one side of the drive block. The tooth-shifting assembly is fixedly connected to the connecting block. The linear drive mechanism drives the tooth-shifting assembly to move and squeeze the saw blade to rotate at a set angle. A guide component is provided on the mounting frame. The guide component is used to squeeze the connecting block relative to the drive block to slide away from the saw blade, so that the tooth-shifting assembly switches to engage with another inner angle of the saw blade.

[0012] The drive block has a sliding groove and a mounting groove on one side, and the connecting block has a baffle and a slider for sliding connection with the sliding groove on one side. The baffle is movably fitted in the mounting groove, and an encapsulation plate is detachably connected to one end of the mounting groove. A spring is compressed between the baffle and the encapsulation plate.

[0013] Furthermore, the tooth assembly includes a fixing block, a tooth rod, and a fastening screw. A threaded hole is provided on one side of the connecting block. The fixing block is fixedly connected to the threaded hole by a screw. A fixing hole is provided on the fixing block. One end of the tooth rod is inserted into the fixing hole. The fastening screw is threadedly connected to the fixing block, and the fastening screw extends radially along the tooth rod into the fixing hole and squeezes the tooth rod.

[0014] In addition, the guiding component includes a first guiding plate and a second guiding plate. The first guiding plate is provided with a first guiding groove, and the second guiding plate is provided with a second guiding groove. The first guiding groove is a straight groove, and the second guiding groove is a curved groove. One end of the second guiding groove is connected to the first guiding groove.

[0015] The bottom of the connecting block is provided with a guide rod for cooperating with the first guide groove or the second guide groove. When the guide rod is located in the first guide groove, the toothed rod is a set distance away from the saw blade on the mounting rod. When the guide rod is located in the second guide groove at one end away from the first guide groove, the toothed rod is located inside the inner corner of the saw blade on the mounting rod. When the side of the baffle away from the spring contacts the inner wall of the mounting groove, the end of the second guide groove away from the first guide groove is located on the trajectory of the guide rod as it moves with the connecting block.

[0016] Optionally, the guide rod is an elastic telescopic rod, the inner bottom surface of the first guide groove is lower than the inner bottom surface of the second guide groove, the guide rod is in an elastic contracted state when it is located in the second guide groove, a first inclined block is provided at the end of the second guide groove away from the first guide groove, the lower end of the first inclined block is lower than the lowest part of the guide rod, and the upper end of the first inclined block is located on the inner bottom surface of the second guide groove.

[0017] Optionally, the guide rod is an elastic telescopic rod, the inner bottom surface of the first guide groove and the inner bottom surface of the second guide groove are on the same plane, and a second inclined block is provided in the second guide groove near one end of the first guide groove, with the lower end of the second inclined block located on the inner bottom surface of the second guide groove.

[0018] Furthermore, the second guide plate is disposed on the first guide plate, and the side of the second guide plate is flush with the inner wall of one side of the first guide groove. The second guide plate is provided with an elongated hole that is consistent with the extension direction of the first guide groove. The first guide plate is provided with a connecting hole that is aligned with the elongated hole. The screw passes through the elongated hole and the connecting hole and is threadedly connected to the mounting bracket.

[0019] In this invention, the mounting rod is rotatably connected to the lifting block about the axial direction, and the center of the saw blade is interference-fitted with the mounting rod.

[0020] In this invention, a fixed platform is fixedly installed on the side of the working platform near the mounting plate, a support rod is fixedly installed on one side of the fixed platform, a fixed cylinder is fixedly installed in the middle of the support rod, the movable clamp is fixedly installed at the movable end of the fixed cylinder, and the fixed clamp is fixedly installed on one side of the bearing block.

[0021] Compared with the prior art, the sawtooth inner corner rounding grinding equipment provided by the present invention has the following beneficial effects:

[0022] When using the saw blade tooth inner corner rounding grinding equipment of the present invention, the saw blade is first installed, at which point the saw blade will be positioned with the tooth-shifting assembly. Then, the bearing block is moved to the processing position by the feeding hydraulic rod. The movable clamping plate is moved by the fixed cylinder. The movable clamping plate and the fixed clamping plate clamp the saw blade. The grinding device drives the grinding wheel to descend and rotate to grind the inner corner rounding of the saw blade. After grinding one tooth, the saw blade is driven to rotate at a set angle by the tooth-shifting assembly to grind the next tooth. All saw blade teeth can be ground at once. The operation is simple and efficient. Attached Figure Description

[0023] Figure 1 One of the overall structural schematic diagrams of the sawtooth inner corner rounding arc grinding equipment provided by the present invention;

[0024] Figure 2 The second schematic diagram shows the overall structure of the sawtooth inner corner rounding grinding device provided by the present invention.

[0025] Figure 3 This is one of the structural schematic diagrams of the guide assembly of the sawtooth inner corner rounding grinding device provided by the present invention.

[0026] Figure 4 This is the second schematic diagram of the guiding component of the sawtooth inner corner rounding grinding device provided by the present invention.

[0027] Figure 5 A schematic diagram of the drive block and connecting block of the sawtooth inner corner rounding grinding device provided by the present invention.

[0028] Figure 6 A schematic diagram of the tooth-grinding assembly of the sawtooth inner corner rounding arc grinding device provided by the present invention.

[0029] The diagram shows the following components: 1. Working platform; 2. Mounting plate; 3. Bearing block; 4. Grinding device; 5. Grinding wheel; 6. Grinding tooth assembly; 61. Fixing block; 62. Grinding tooth rod; 63. Fastening screw; 7. Mounting bracket; 8. Feeding hydraulic rod; 9. Lifting block; 10. Linear drive mechanism; 11. Mounting rod; 12. Connecting bracket; 13. Lifting hydraulic rod; 14. Drive block; 141. Slide groove; 142. Mounting groove; 143. Encapsulation plate; 15. Connecting block; 151. 152. Slider; 153. Baffle; 154. Threaded hole; 16. Fixing clamp; 17. Guide assembly; 171. First guide plate; 1711. First guide groove; 1712. Connecting hole; 1713. Protrusion; 172. Second guide plate; 1721. Second guide groove; 1722a. First inclined block; 1722b. Second inclined block; 1723. Elongated hole; 18. Fixing platform; 19. Support rod; 20. Fixing cylinder; 21. Movable clamp; 22. Spring. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0031] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0032] Please see Figures 1 to 2 This invention provides a sawtooth inner corner rounding grinding device, which includes a working platform 1, a mounting frame 7, a grinding device 4, a tooth-picking assembly 6, a movable clamping plate 21, and a fixed clamping plate 16. A mounting plate 2 is fixedly installed on the working platform 1.

[0033] Mounting bracket 7 is set on one side of mounting plate 2. A feeding hydraulic rod 8 is fixedly installed at one end of the mounting bracket 7. The movable end of the feeding hydraulic rod 8 is connected to a bearing block 3. A lifting block 9 is slidably installed on the bearing block 3. A mounting rod 11 for mounting saw blades is installed on one side of the lifting block 9. The lifting block 9 is connected to the movable end of a lifting hydraulic rod 13. When it is necessary to process saw blades of different diameters, the lifting block 9 can be driven to rise and fall by the lifting hydraulic rod 13, thereby adjusting the position of the mounting rod 11.

[0034] The grinding device 4 is located on one side of the mounting plate 2 and on the top of the mounting frame 7. The output end of the grinding device 4 is equipped with a grinding wheel 5 for grinding the inner corner arc of the saw blade.

[0035] The tooth-picking assembly 6 is slidably mounted on the mounting frame 7 and connected to the bearing block 3 via the connecting frame 12. The tooth-picking assembly 6 is used to drive the saw blade to rotate at a set angle so that the grinding device 4 can grind the multiple inner corner arcs of the saw blade one by one.

[0036] The movable clamping plate 21 and the fixed clamping plate 16 are used to clamp the saw blade during grinding.

[0037] When processing the saw blade, the feeding hydraulic rod 8 first drives the bearing block 3 to slide to the end away from the grinding device 4. Then, the saw blade is installed on the mounting rod 11. At the same time, it is necessary to ensure that the inner corner of the saw blade is engaged with the tooth assembly 6. Then, the feeding hydraulic rod 8 moves the bearing block 3 to the processing position. The movable clamping plate 21 and the fixed clamping plate 16 clamp the saw blade that needs to be ground. The grinding device 4 drives the grinding wheel 5 to descend and rotate, which can grind the first inner corner arc of the saw blade.

[0038] In this embodiment, the tooth-shifting assembly 6 is driven by a linear drive mechanism 10. A drive block 14 is fixedly connected to the movable end of the linear drive mechanism 10, and a connecting block 15 is movably connected to one side of the drive block 14. The tooth-shifting assembly 6 is fixedly connected to the connecting block 15. The linear drive mechanism 10 drives the tooth-shifting assembly 6 to move and squeeze the saw blade to rotate at a set angle. A guide assembly 17 is provided on the mounting frame 7. The guide assembly 17 is used to squeeze the connecting block 15 relative to the drive block 14 to slide away from the saw blade, so that the tooth-shifting assembly 6 can switch to engage with another inner angle of the saw blade.

[0039] It should be noted that the linear drive mechanism 10 can be a linear drive mechanism commonly used in the prior art, such as a cylinder or an electric push rod.

[0040] Please refer to Figure 5The drive block 14 has a sliding groove 141 and a mounting groove 142 on one side, and the connecting block 15 has a baffle 152 and a slider 151 for sliding connection with the sliding groove 141 on one side. The baffle 152 is movably fitted in the mounting groove 142. One end of the mounting groove 142 is detachably connected to a sealing plate 143. A spring 22 is compressed between the baffle 152 and the sealing plate 143. Removing the sealing plate 143 makes it easier to install the spring 22 between the baffle 152 and the sealing plate 143. The spring 22 drives the connecting block to slide closer to the saw blade by pressing the baffle 152.

[0041] Please refer to Figure 6 Specifically, the tooth-shifting assembly 6 includes a fixing block 61, a tooth-shifting rod 62, and a fastening screw 63. A threaded hole 153 is provided on one side of the connecting block 15. The fixing block 61 is fixedly connected to the threaded hole 153 by a screw. A fixing hole is provided on the fixing block 61. One end of the tooth-shifting rod 62 is inserted into the fixing hole. The fastening screw 63 is threadedly connected to the fixing block 61, and the fastening screw 63 extends into the fixing hole along the radial direction of the tooth-shifting rod 62 and squeezes the tooth-shifting rod 62. When processing saw blades of different thicknesses, the length of the tooth-shifting rod 62 extending out of the fixing block 61 can be adjusted to adjust the time point at which the tooth-shifting rod 62 disengages from the saw blade during the movement of the connecting block 15.

[0042] It should be noted that one end of the slide 141 passes through the drive block 14, while the other end does not. When the spring 22 drives the baffle 152 to contact the inner wall of the non-penetrated end of the slide 141, the toothed rod 62 is located inside the inner corner of the saw blade.

[0043] Please refer to Figure 4 and Figure 5 In this embodiment, the guide component 17 includes a first guide plate 171 and a second guide plate 172. The first guide plate 171 is provided with a first guide groove 1711, and the second guide plate 172 is provided with a second guide groove 1721. The first guide groove 1711 is a straight groove, and the second guide groove 1721 is a curved groove. One end of the second guide groove 1721 is connected to the first guide groove 1711.

[0044] The bottom of the connecting block 15 is provided with a guide rod for cooperating with the first guide groove 1711 or the second guide groove 1721. When the guide rod is located in the first guide groove 1711, the toothed rod 62 is a set distance away from the saw blade on the mounting rod 11. When the guide rod is located in the second guide groove 1721 at one end away from the first guide groove 1711, the toothed rod 62 is located inside the inner corner of the saw blade on the mounting rod 11. When the side of the baffle 152 away from the spring 22 contacts the inner wall of the mounting groove, the end of the second guide groove 1721 away from the first guide groove 1711 is located on the trajectory of the guide rod moving with the connecting block 15. As the linear drive mechanism 10 drives the tooth assembly 6 to move and squeeze the saw blade to rotate, the guide rod gradually enters the second guide groove 1721 from the end away from the first guide groove 1711. As the tooth assembly 6 continues to move, the guide rod gradually slides from the second guide groove 1721 into the first guide groove 1711. During this process, the connecting block 15 gradually slides away from the saw blade relative to the drive block 14, thereby causing the tooth rod 62 to gradually disengage from the inner corner of the saw blade.

[0045] Please refer to Figure 4 One optional implementation structure of the guide component 17 is as follows: the guide rod is an elastic telescopic rod (elastic telescopic rod structures are common in the prior art, and can be, but are not limited to, the common spring plunger structure in the prior art, which will not be described in detail in this embodiment). The inner bottom surface of the first guide groove 1711 is lower than the inner bottom surface of the second guide groove 1721. When the guide rod is located in the second guide groove 1721, it is in an elastically contracted state. A first inclined block 1722a is provided at the end of the second guide groove 1721 away from the first guide groove 1711. The lower end of the first inclined block 1722a is lower than the lowest part of the guide rod, and the upper end of the first inclined block 1722a is located on the inner bottom surface of the second guide groove 1721, so that the guide rod can slide into the second guide groove 1721 through the first inclined block 1722a. When the guide rod slides into the first guide groove 1711, the guide rod extends and can only move from the first guide groove 1721 to the second guide groove 1721. Figure 4 The lower end of the first guide groove 1711 slides out in the orientation so that the toothed rod 62 can engage with the other inner corner of the saw blade.

[0046] Please refer to Figure 5 Another optional implementation of the guide component 17 is as follows: the guide rod is an elastic telescopic rod; the inner bottom surface of the first guide groove 1711 and the inner bottom surface of the second guide groove 1721 are on the same plane; a second inclined block 1722b is provided at one end of the second guide groove 1721 near the first guide groove 1711; the lower end of the second inclined block 1722b is located on the inner bottom surface of the second guide groove 1721, so that the guide rod can slide from the second guide groove 1721 into the first guide groove 1711, and from... Figure 5The lower end of the first guide groove 1711 slides out in the orientation so that the toothed rod 62 can engage with another inner corner of the saw blade. In this embodiment, the first guide plate 171 is provided with a protrusion 1713 for forming the first guide groove 1711, and the corresponding second guide plate 172 is provided with a concave step that matches the protrusion 1713.

[0047] In this embodiment, the second guide plate 172 is disposed on the first guide plate 171, and the side of the second guide plate 172 is flush with the inner wall of one side of the first guide groove 1711. The second guide plate 172 is provided with an elongated hole 1723 that is consistent with the extension direction of the first guide groove 1711. The first guide plate 171 is provided with a connecting hole 1712 that is aligned with the elongated hole 1723. The screw passes through the elongated hole 1723 and the connecting hole 1712 and is threadedly connected to the mounting bracket 7, thereby fixing the first guide plate 171 and the second guide plate 172 together on the mounting bracket 7. At the same time, the provision of the elongated hole 1723 allows the position of the second guide groove 1721 communicating with the first guide groove 1711 to change the angle at which the toothed rod 62 drives the saw blade to rotate, thereby making it suitable for moving saw blades with different tooth pitches.

[0048] In this embodiment, the mounting rod 11 is rotatably connected to the lifting block 9 around the axial direction. The center of the saw blade is interference-fitted with the mounting rod 11, meaning that a certain amount of external force is required to detach and assemble the saw blade from the mounting rod 11. After the saw blade is connected to the mounting rod 11, the toothed rod 62 can drive the saw blade to rotate, and the saw blade is not prone to wobbling along the axial direction of the mounting rod 11, thus maintaining a stable position. It should also be noted that the rotation between the mounting rod 11 and the lifting block 9 is a rotational fit with a certain damping force to prevent the saw blade from rotating too easily and to facilitate the switching of the toothed rod and the engagement of different inner angles of the saw blade.

[0049] In this embodiment, a fixed platform 18 is fixedly installed on the side of the working platform 1 near the mounting plate 2. A support rod 19 is fixedly installed on one side of the fixed platform 18. A fixed cylinder 20 is fixedly installed in the middle of the support rod 19. A movable clamping piece 21 is fixedly installed at the movable end of the fixed cylinder 20. A fixed clamping piece 16 is fixedly installed on one side of the bearing block 3. After the saw blade is inserted into the mounting rod 11, the saw blade can easily contact the fixed clamping piece 16, which is very stable.

[0050] Working principle: When processing the saw blade, the feeding hydraulic rod 8 first drives the bearing block 3 to slide to the end away from the grinding device 4, which facilitates the loading and unloading of the saw blade. Then, the saw blade is installed on the mounting rod 11. At the same time, it is necessary to ensure that the inner corner of the saw blade is engaged with the toothing rod 62 of the toothing assembly 6. Then, the bearing block 3 is moved to the processing position by the feeding hydraulic rod 8. The movable clamping plate 21 and the fixed clamping plate 16 clamp the saw blade that needs to be ground. The grinding device 4 drives the grinding wheel 5 to descend and rotate, which can grind the first inner corner arc of the saw blade.

[0051] After machining the first inner corner radius of the saw blade, the movable clamp 21 and the fixed clamp 16 release the saw blade, and the linear drive mechanism 10 drives the tooth-shifting assembly 6 to move. During the movement, the tooth-shifting rod 62 drives the saw blade to rotate, and at the same time, the guide rod gradually enters the second guide groove 1721 from the end away from the first guide groove 1711. As the tooth-shifting assembly 6 continues to move, the guide rod gradually slides from the second guide groove 1721 into the first guide groove 1711. At this time, the connecting block 15 gradually slides away from the saw blade relative to the drive block 14, thereby causing the tooth-shifting rod 62 to gradually disengage from the inner corner of the saw blade. Then, the linear drive mechanism 10 drives the tooth-shifting assembly 6 to reset, and the guide rod slides out from the end of the first guide groove 1711 near the linear drive mechanism 10. Without the compression of the guide assembly 17, the connecting block 15 is driven by the spring 22 to slide towards the saw blade, so that the tooth-shifting rod 62 engages with the other inner corner of the saw blade for the next tooth-shifting action. This process is repeated so that the grinding device 4 grinds the multiple inner corner arcs of the saw blade one by one.

[0052] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A device for polishing a circular arc of an inner corner of a sawtooth, characterized by, include: A working platform (1) is fixedly installed on the working platform (1); Mounting bracket (7) is set on one side of mounting plate (2). A feeding hydraulic rod (8) is fixedly installed at one end of the mounting bracket (7). A bearing block (3) is connected to the movable end of the feeding hydraulic rod (8). A lifting block (9) is slidably installed on the bearing block (3). A mounting rod (11) for mounting saw blade is provided on one side of the lifting block (9). A grinding device (4) is provided on one side of the mounting plate (2) and located on the top of the mounting frame (7). The output end of the grinding device (4) is equipped with a grinding wheel (5) for grinding the inner corner arc of the saw blade. The tooth-picking assembly (6) is slidably mounted on the mounting frame (7) and connected to the bearing block (3) via the connecting frame (12). The tooth-picking assembly (6) is used to drive the saw blade to rotate at a set angle so that the grinding device (4) grinds the multiple inner corner arcs of the saw blade one by one. The movable clamping plate (21) and the fixed clamping plate (16) are used to clamp the saw blade during grinding; The tooth-shifting assembly (6) is driven by a linear drive mechanism (10). A drive block (14) is fixedly connected to the movable end of the linear drive mechanism (10). A connecting block (15) is movably connected to one side of the drive block (14). The tooth-shifting assembly (6) is fixedly connected to the connecting block (15). The linear drive mechanism (10) drives the tooth-shifting assembly (6) to move and squeeze the saw blade to rotate at a set angle. A guide assembly (17) is provided on the mounting frame (7). The guide assembly (17) is used to squeeze the connecting block (15) relative to the drive block (14) to slide away from the saw blade so that the tooth-shifting assembly (6) can switch to engage with another inner angle of the saw blade. The drive block (14) has a mounting groove (142) on one side, and the connecting block (15) has a baffle (152) on one side. The baffle (152) is movably fitted in the mounting groove (142). One end of the mounting groove (142) is detachably connected to an encapsulation plate (143). A spring (22) is compressed between the baffle (152) and the encapsulation plate (143). The tooth-shifting assembly (6) includes a tooth-shifting rod (62), and the guide assembly (17) includes a first guide plate (171) and a second guide plate (172). The first guide plate (171) is provided with a first guide groove (1711), and the second guide plate (172) is provided with a second guide groove (1721). The first guide groove (1711) is a straight groove, and the second guide groove (1721) is a curved groove. One end of the second guide groove (1721) is connected to the first guide groove (1711). The bottom of the connecting block (15) is provided with a guide rod for cooperating with the first guide groove (1711) or the second guide groove (1721). When the guide rod is located in the first guide groove (1711), the toothed rod (62) is a set distance away from the saw blade on the mounting rod (11). When the guide rod is located in the second guide groove (1721) at the end away from the first guide groove (1711), the toothed rod (62) is located inside the inner corner of the saw blade on the mounting rod (11). When the side of the baffle (152) away from the spring (22) contacts the inner wall of the mounting groove, The end of the second guide groove (1721) away from the first guide groove (1711) is located on the trajectory of the guide rod moving with the connecting block (15). The guide rod can gradually enter the second guide groove (1721) from the end of the second guide groove (1721) away from the first guide groove (1711), and then gradually slide into the first guide groove (1711) from the second guide groove (1721). During this process, the connecting block (15) will gradually slide away from the saw blade relative to the driving block (14), thereby causing the toothed rod (62) to gradually disengage from the inner corner of the saw blade.

2. The inside corner round sanding apparatus of claim 1, wherein, The drive block (14) has a slide groove (141) on one side, and the connecting block (15) has a baffle (152) and a slider (151) for sliding connection with the slide groove (141) on one side.

3. The inside corner round sanding apparatus of claim 2, wherein, The tooth assembly (6) further includes a fixing block (61) and a fastening screw (63). A threaded hole (153) is provided on one side of the connecting block (15). The fixing block (61) is fixedly connected to the threaded hole (153) by a screw. A fixing hole is provided on the fixing block (61). One end of the tooth rod (62) is inserted into the fixing hole. The fastening screw (63) is threadedly connected to the fixing block (61). The fastening screw (63) extends along the radial direction of the tooth rod (62) into the fixing hole and squeezes the tooth rod (62).

4. The inside corner round sanding apparatus of claim 1, wherein, The guide rod is an elastic telescopic rod. The inner bottom surface of the first guide groove (1711) is lower than the inner bottom surface of the second guide groove (1721). When the guide rod is located in the second guide groove (1721), it is in an elastic contraction state. A first inclined block (1722a) is provided at the end of the second guide groove (1721) away from the first guide groove (1711). The lower end of the first inclined block (1722a) is lower than the lowest part of the guide rod, and the upper end of the first inclined block (1722a) is located on the inner bottom surface of the second guide groove (1721).

5. The inside corner round sanding apparatus of claim 1, wherein, The guide rod is an elastic telescopic rod. The inner bottom surface of the first guide groove (1711) and the inner bottom surface of the second guide groove (1721) are located on the same plane. A second inclined block (1722b) is provided in the second guide groove (1721) near the end of the first guide groove (1711). The lower end of the second inclined block (1722b) is located on the inner bottom surface of the second guide groove (1721).

6. The inside corner round sanding apparatus of claim 2, wherein, The second guide plate (172) is disposed on the first guide plate (171), and the side of the second guide plate (172) is flush with the inner wall of one side of the first guide groove (1711). The second guide plate (172) is provided with an elongated hole (1723) that is consistent with the extension direction of the first guide groove (1711). The first guide plate (171) is provided with a connecting hole (1712) that is aligned with the elongated hole (1723). The screw passes through the elongated hole (1723), the connecting hole (1712) and is threadedly connected to the mounting bracket (7).

7. The inside corner round sanding apparatus of claim 1, wherein, The mounting rod (11) is rotatably connected to the lifting block (9) in the axial direction, and the center of the saw blade is interference-fitted with the mounting rod (11).

8. The sawtooth inner corner rounding grinding equipment according to claim 1, characterized in that, A fixed platform (18) is fixedly installed on the side of the work platform (1) near the mounting plate (2). A support rod (19) is fixedly installed on one side of the fixed platform (18). A fixed cylinder (20) is fixedly installed in the middle of the support rod (19). The movable clamp (21) is fixedly installed at the movable end of the fixed cylinder (20). The fixed clamp (16) is fixedly installed on one side of the bearing block (3).

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