Chamfering cutter and chamfering method for machining graphite boat piece

Abstract

The invention relates to the technical field of chamfering cutter structures, in particular to a chamfering cutter for machining graphite boat pieces, which comprises a chamfering cutter group, the chamfering cutter group is inserted and mounted in a locking accessory, the chamfering cutter group comprises an insertion shaft, a shaft group is rotatably mounted in the insertion shaft, the shaft group comprises a special-shaped plug pin, and the special-shaped plug pin is inserted into the insertion shaft. A chassis is connected to the right side of the special-shaped bolt, and a plurality of chamfering milling cutters are mounted on the surface of the special-shaped bolt in parallel in a sleeving manner. The special-shaped plug pin is arranged on the surface of the threaded shaft in a sleeving manner, so that the chamfering milling cutters are mounted on the surface of the special-shaped plug pin in parallel, and when a single chamfering milling cutter is damaged, the chamfering milling cutters can be taken down from the surface of the special-shaped plug pin to be replaced, so that the replaceability of the chamfering milling cutters is realized, and the situation that the whole cutter is scrapped due to poor quality of a single cutting edge is effectively avoided; the threaded shaft is controlled to rotate, so that the threaded shaft is matched with an internal thread of the special-shaped bolt, then the special-shaped bolt is controlled to move in the insertion shaft, and the length of the special-shaped bolt extending out of the insertion shaft is changed and adjusted.

Description

Technical Field

[0001] This invention relates to the field of chamfering tool structure technology, and in particular to a chamfering tool and chamfering method for processing graphite boat sheets. Background Technology

[0002] In the silicon wafer coating production process, graphite boats are generally used as carrier devices to enable batch coating of silicon wafers. A graphite boat typically consists of multiple graphite boat sheets arranged at equal intervals. Each graphite boat sheet has multiple support positions, and both ends of the graphite boat have protrusions for fixed connection. The support positions on the graphite boat sheets are formed by hollow support grooves. As a silicon wafer carrier, the graphite boat plays a key role in the silicon wafer preparation process, and the graphite boat sheets are an important component of the graphite boat. In the photovoltaic field, graphite boats are repeatedly used as important equipment.

[0003] In existing technologies, the general process for producing graphite boat sheets includes material cutting, sawing, grooving, and finishing. The finishing step requires chamfering the corners of the hollowed-out areas of the graphite boat sheet. During this process, it is necessary to ensure that the four corners and the top edge of the hollowed-out area have a 45° chamfer with a designed side length of 0.5mm. However, the chamfering process requires separate chamfering of both the front and back sides, meaning only one sheet can be chamfered at a time, necessitating two repeated clamping operations, which is inefficient. Furthermore, single-sheet chamfering can cause the graphite boat sheet to vibrate due to the cutting force, affecting the processing quality. Therefore, a chamfering tool and chamfering method for processing graphite boat sheets are needed to solve these problems. Summary of the Invention

[0004] The purpose of this invention is to solve the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A chamfering cutter for machining graphite boat sheets includes a chamfering cutter assembly. The chamfering cutter assembly is inserted and installed inside a locking accessory. The chamfering cutter assembly includes a insert shaft, and a shaft assembly is rotatably mounted inside the insert shaft. The shaft assembly includes a shaped pin. A base is connected to the right side of the shaped pin. Multiple chamfering end mills are mounted side by side on the surface of the shaped pin. The cutting edge distance between two adjacent chamfering end mills is exactly the thickness of one boat sheet, which is 2.5 mm. The total thickness of 10 boat sheets stacked together is 25 mm. The effective cutting edge length of the chamfering end mills is 25 mm, and chamfering can be completed in one pass.

[0007] Preferably, the distance between the cutting edges of two adjacent chamfering cutters is 2.5mm. A disc-shaped protrusion is provided on the right side of the chamfering cutter, and an inner groove adapted to the disc-shaped protrusion is provided on the left side of the chamfering cutter. The disc-shaped protrusion of one chamfering cutter is inserted into the inner groove of another chamfering cutter, so that the multiple chamfering cutters form a whole.

[0008] Preferably, a limiting disk is rotatably installed inside the insert shaft via a rotating groove. An internal hexagonal knob is connected to the left side of the limiting disk, and a threaded shaft is connected to the right side of the limiting disk. The threaded shaft is inserted into the irregularly shaped pin through a threaded hole. By cooperating with the insert shaft and the inlay block, a rotating groove can be formed inside to limit the rotation of the limiting disk. The limiting disk can be limited by the rotating groove.

[0009] Preferably, the vertical cross-section of the irregular-shaped pin is designed with a triangular structure, and a triangular recessed slot adapted to the irregular-shaped pin is provided on the right side of the insertion shaft. The triangular recessed slot of the insertion shaft can limit the irregular-shaped pin and prevent the irregular-shaped pin from moving or shaking.

[0010] Preferably, a positioning plate is connected to the right side of the insertion shaft, and three positioning blocks are provided on the side of the positioning plate. Multiple pads are fastened to the surface of the irregular pin, and the bottom of the pads is provided with triangular slots that are compatible with the irregular pin. The design of the three positioning blocks on the side of the positioning plate can guide the placement and installation of the pads, and prevent the first pad from easily falling off after being installed on the surface of the irregular pin.

[0011] Preferably, an insert block is embedded in the groove on the side of the insert shaft, and an inner block is connected to the right side of the insert block. The inner block is inserted into the insert shaft through a positioning groove. The surface of the insert block is fixed to the insert shaft by two locking bolts. Both the insert shaft and the insert block have slots on their outer sides. The inner block is inserted into the positioning groove of the insert shaft for locking and fixing, preventing the insert block from falling off. When disassembling or assembling the limiting plate, the locking bolts can be disengaged from the threaded holes of the insert block and the insert shaft by rotating the two locking bolts.

[0012] Preferably, the locking accessory includes a sleeve assembly, which includes a retaining sleeve. The retaining sleeve is sleeved on the outside of the insert shaft and the insert block. A threaded cylinder shaft is connected to the left side of the retaining sleeve, and a side receiving plate is connected to the left side of the threaded cylinder shaft. A knob accessory is threaded on the surface of the threaded cylinder shaft. Three locking accessories are arranged around the retaining sleeve. Each locking accessory includes a locking pin plate. A movable shaft is connected to the outside of the locking pin plate, and the movable shaft passes through the inside of the retaining sleeve through a through groove. The end of the locking pin plate is fixed to the inner wall of the retaining sleeve by a support spring. A wedge plate is connected to the outside of the movable shaft. By moving the knob accessory on the surface of the threaded cylinder shaft, the inclined surface of the wedge plate can be pressed down. After the wedge plate is subjected to force, it can push the movable shaft, thereby controlling the locking pin plate to be inserted into the retaining groove on the outside of the insert shaft and the insert block, which facilitates the installation and fixing of the insert shaft.

[0013] Preferably, the button sleeve includes a button sleeve threaded onto the surface of the threaded cylinder shaft. An outer ring is connected to the right side of the button sleeve, and a movable pressure ring is movably installed on the inner wall of the outer ring through a ring groove. By rotating and moving the button sleeve on the surface of the threaded cylinder shaft, the outer ring can be pushed, so that the movable pressure ring can abut against the surface of the wedge plate to perform a pressure operation.

[0014] A method for using a chamfering tool for machining graphite boat sheets, the steps of which are as follows:

[0015] The first step is to insert the limiting plate and the threaded shaft into the insert shaft, and to fasten the insert block to the outside of the insert shaft and fix it with locking bolts;

[0016] The second step is to place an appropriate number of chamfering cutters side by side on the surface of the irregular pin, and rotate the internal hexagon knob to rotate the threaded shaft to control the movement and fastening of the irregular pin in the triangular groove of the shaft.

[0017] The third step is to add an appropriate number of shims to the surface of the irregular pin according to the chamfering requirements of the chamfering cutter. By using the threaded engagement between the threaded shaft and the irregular pin, the installation tightness of the chamfering cutter can be changed.

[0018] The fourth step is to insert the insert shaft and the inlay block into the retaining sleeve, and push the retaining accessory by moving the knob accessory so that the retaining accessory presses and installs the insert shaft and the inlay block. Then, place the chamfering cutter on the hollowed-out part of the graphite boat piece so that the chamfering cutter can simultaneously chamfer the hollowed-out corners of each graphite boat piece.

[0019] The present invention has at least the following beneficial effects:

[0020] 1. By setting up a chamfering cutter set, direct chamfering of 10 graphite boat sheets can be achieved. Compared with the traditional structure, this device forms the shape by stacking 10 sheets at once. When chamfering, the chamfering is performed directly on all 10 sheets at once using chamfering cutters. The thickness of the graphite boat sheet is 2.5mm. The cutting edge distance between two adjacent chamfering cutters is exactly the thickness of one boat sheet (2.5mm). The total thickness of the 10 boat sheets after stacking is 25mm. The effective cutting edge length of the chamfering cutter is 25mm, which can complete the chamfering in one go, improving the chamfering efficiency and avoiding the need for repeated clamping of graphite boat sheets during chamfering. Multiple chamfering cutters simultaneously chamfer multiple graphite boat sheets, which can avoid the situation where the graphite boat sheet vibrates due to excessive cutting force when chamfering a single graphite boat sheet, thus ensuring the processing quality of the graphite boat sheets.

[0021] 2. By setting up a shaft assembly, backing plate, and chamfering cutter, the replacement and position adjustment of independent chamfering cutters can be achieved. This device uses a special-shaped pin sleeved on the surface of the threaded shaft, so that the chamfering cutters are installed side by side on the surface of the special-shaped pin. When a single chamfering cutter is damaged, it can be removed from the surface of the special-shaped pin and replaced, realizing the replaceability of the chamfering cutter and effectively avoiding the scrapping of the entire tool due to the poor quality of a single cutting edge. By turning the internal hexagonal knob with a tool, the rotation of the threaded shaft can be controlled, so that the threaded shaft and the internal thread of the special-shaped pin are engaged, thereby controlling the movement of the special-shaped pin in the insert shaft. By changing and adjusting the length of the special-shaped pin extending into the insert shaft, multiple chamfering cutters can be freely replaced to meet the synchronous chamfering requirements of multiple graphite boat pieces.

[0022] 3. By setting up a plug shaft, locking bolt, insert block, inner block, and shaft assembly, the threaded shaft can be replaced independently. This device rotates the locking bolt to disengage it from the plug shaft and insert block, and simultaneously slides the insert block to disengage the inner block from the groove of the plug shaft. At this point, the limiting plate can be removed, allowing the threaded shaft to be pulled out of the plug shaft, making it convenient for workers to replace the threaded shaft. This avoids damage to the threads on the surface of the threaded shaft, which could cause stripping and affect the adjustment of the position of the irregular pin. The components of the device can be replaced independently, reducing the overall replacement cost of parts and further improving the practicality of the device.

[0023] 4. By setting locking accessories, the insertion shaft can be quickly inserted and connected. This device uses the insertion shaft and the inlay block to be inserted into the through groove of the clamping cylinder. By rotating and moving the button sleeve, it pushes the external ring, so that the wedge plate is subjected to force to push the movable shaft. The movable shaft is controlled to push the locking plate into the groove on the surface of the insertion shaft and the inlay block, thereby locking the chamfering knife assembly and preventing the chamfering knife assembly from shaking during use and affecting the chamfering effect on the graphite boat sheet. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the external structure of a chamfering tool and chamfering method for processing graphite boat sheets proposed in this invention;

[0026] Figure 2 This is a schematic diagram of the external disassembly structure of a chamfering tool and chamfering method for processing graphite boat sheets proposed in this invention;

[0027] Figure 3This is a three-dimensional disassembly diagram of a chamfering tool and chamfering method for processing graphite boat sheets, as proposed in this invention;

[0028] Figure 4 This is a partial disassembly diagram of the shaft assembly in the chamfering tool and chamfering method for processing graphite boat sheets proposed in this invention;

[0029] Figure 5 This is a three-dimensional disassembly diagram of the backing plate and the chamfering milling cutter in a chamfering cutter and chamfering method for processing graphite boat sheets proposed in this invention;

[0030] Figure 6 This is a three-dimensional disassembly diagram of the locking component in a chamfering tool and chamfering method for processing graphite boat sheets proposed in this invention;

[0031] Figure 7 This is a partial disassembly diagram of the knob component in a chamfering tool and chamfering method for processing graphite boat sheets proposed in this invention.

[0032] In the diagram: 1. Chamfering cutter assembly; 11. Insert shaft; 12. Inlay block; 13. Locking bolt; 14. Slot; 15. Inset block; 16. Shaft assembly; 161. Irregular pin; 162. Chassis; 163. Threaded shaft; 164. Limiting plate; 165. Hexagonal knob; 166. Positioning plate; 17. Pad; 18. Chamfering end mill; 2. Locking accessories; 21. Sleeve assembly; 211. Cladle; 212. Threaded cylinder shaft; 213. Side connecting plate; 22. Connecting accessories; 221. Locking pin plate; 222. Movable shaft; 223. Wedge plate; 224. Support spring; 23. Knob accessories; 231. Button sleeve; 232. Outer ring; 233. Movable pressure ring. Detailed Implementation

[0033] 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.

[0034] Reference Figure 1-7 A chamfering tool for processing graphite boat sheets includes a chamfering tool assembly 1, which is inserted and installed inside a locking accessory 2. The chamfering tool assembly 1 includes a insert shaft 11, and a shaft assembly 16 is rotatably installed inside the insert shaft 11. The shaft assembly 16 includes a shaped pin 161, and a base 162 is connected to the right side of the shaped pin 161. Multiple chamfering cutters 18 are mounted side by side on the surface of the shaped pin 161.

[0035] The distance between the cutting edges of two adjacent chamfering cutters 18 is 2.5mm. A disc-shaped protrusion is provided on the right side of the chamfering cutter 18, and an inner groove adapted to the disc-shaped protrusion is provided on the left side of the chamfering cutter 18.

[0036] The insertion shaft 11 is mounted with a limiting plate 164 through a rotating groove. The left side of the limiting plate 164 is connected to an internal hexagonal knob 165, and the right side of the limiting plate 164 is connected to a threaded shaft 163. The threaded shaft 163 is inserted into the irregular pin 161 through a threaded hole.

[0037] The vertical cross-section of the irregular pin 161 is designed with a triangular structure, and a triangular recessed slot adapted to the irregular pin 161 is provided on the right side of the insertion shaft 11.

[0038] The right side of the insertion shaft 11 is connected to the positioning plate 166, and the positioning plate 166 has three positioning blocks on its side. Multiple pads 17 are fastened to the surface of the irregular pin 161, and the bottom of the pad 17 has a triangular slot that matches the irregular pin 161.

[0039] An insert block 12 is embedded in the groove on the side of the insert shaft 11. An insert block 15 is connected to the right side of the insert block 12. The insert block 15 is inserted into the insert shaft 11 through a positioning groove. The surface of the insert block 12 is fixed to the insert shaft 11 by two locking bolts 13. A slot 14 is opened on the outer side of both the insert shaft 11 and the insert block 12.

[0040] The locking accessory 2 includes a sleeve assembly 21, which includes a retaining sleeve 211. The retaining sleeve 211 is sleeved on the outside of the insert shaft 11 and the insert block 12. A threaded cylinder shaft 212 is connected to the left side of the retaining sleeve 211, and a side receiving plate 213 is connected to the left side of the threaded cylinder shaft 212. A knob accessory 23 is threaded on the surface of the threaded cylinder shaft 212. Three locking accessories 22 are arranged around the retaining sleeve 211. The locking accessories 22 include a locking pin plate 221. A movable shaft 222 is connected to the outside of the locking pin plate 221, and the movable shaft 222 passes through the inside of the retaining sleeve 211 through a through groove. The end of the locking pin plate 221 is fixed to the inner wall of the retaining sleeve 211 by a support spring 224. A wedge plate 223 is connected to the outside of the movable shaft 222.

[0041] The sleeve 231 includes a sleeve 231, which is threaded onto the surface of the threaded cylinder shaft 212. An outer ring 232 is connected to the right side of the sleeve 231, and a movable pressure ring 233 is movably installed on the inner wall of the outer ring 232 through a ring groove.

[0042] A method for using a chamfering tool for machining graphite boat sheets, the steps of which are as follows:

[0043] The first step is to insert the limiting plate 164 and the threaded shaft 163 into the insert shaft 11, and the insert block 12 is fastened to the outside of the insert shaft 11 and fixed by the locking bolt 13.

[0044] The second step is to place an appropriate number of chamfering cutters 18 side by side on the surface of the irregular pin 161, and rotate the internal hexagon knob 165 to rotate the threaded shaft 163 to control the movement and fastening of the irregular pin 161 in the triangular through groove of the insert shaft 11.

[0045] The third step is to add an appropriate number of shims 17 to the surface of the irregular pin 161 according to the chamfering requirements of the chamfering cutter 18. The installation tightness of the chamfering cutter 18 is changed by the threaded engagement between the threaded shaft 163 and the irregular pin 161.

[0046] Fourth step, insert the insert shaft 11 and the inlay block 12 into the retaining sleeve 211, and push the retaining accessory 22 by moving the knob accessory 23 so that the retaining accessory 22 presses and installs the insert shaft 11 and the inlay block 12. Then, place the chamfering cutter 18 at the hollowed-out part of the graphite boat piece so that the chamfering cutter 18 can simultaneously chamfer the hollowed-out corners of the 10 graphite boat pieces.

[0047] After the shape is formed by stacking 10 pieces in one go, the chamfering is directly achieved by using chamfering cutters 18 to chamfer all 10 pieces at once. The thickness of the graphite boat pieces is 2.5mm. The cutting edge distance between two adjacent chamfering cutters 18 is exactly the thickness of one boat piece (2.5mm). The total thickness of the 10 boat pieces after stacking is 25mm. The effective cutting edge length of the chamfering cutter 18 is 25mm, which can complete the chamfering in one go. The triangular structure design of the irregular pin 161 facilitates the control of the chamfering cutter 18 to rotate and perform the chamfering operation. The chamfering cutters 18 are placed side by side. When the chamfering cutters 18 are placed, the disc-shaped protrusion of one chamfering cutter 18 is inserted into the inner groove of another chamfering cutter 18, so that the multiple chamfering cutters 18 form a whole, which facilitates the synchronous chamfering operation of multiple graphite boat pieces.

[0048] By engaging the insert shaft 11 with the insert block 12, a rotating groove can be formed inside to limit the rotation of the limiting disk 164. The rotating groove can limit the limiting disk 164, allowing the threaded shaft 163 to rotate in place. This, in turn, controls the movement of the irregular pin 161 within the triangular slot of the insert shaft 11. The triangular structure design of the irregular pin 161 allows the insert shaft 11 to rotate, controlling the irregular pin 161 to rotate. This causes the irregular pin 161 to drive the chamfering cutter 18 to rotate, controlling the chamfering cutter 18 to chamfer the inner corner of the hollow area of ​​the graphite boat sheet. The triangular recessed slot of the insert shaft 11 can limit the irregular pin 161, preventing it from moving or wobbling.

[0049] The three positioning blocks on the side of the positioning plate 166 guide the placement and installation of the pad 17, preventing the first pad 17 from easily falling off after being installed on the surface of the irregular pin 161. The triangular slot design of the pad 17 facilitates its installation on the surface of the irregular pin 161. A protrusion is provided on the right side of the pad 17, and a groove is provided on the left side. When multiple pads 17 are placed side by side, the protrusion is inserted into the groove of the pad 17, ensuring the neatness of the multiple pads 17. When the insert block 12 needs to be installed, it can be placed in the groove of the insert shaft 11 and locked and fixed by the inner insert block 15 inserted into the positioning groove of the insert shaft 11, preventing the insert block 12 from falling off.

[0050] When disassembling and assembling the limiting plate 164, rotating the two locking bolts 13 disengages them from the threaded holes of the insert block 12 and the insert shaft 11, facilitating the separation of the insert block 12 and the insert shaft 11. Once the insert shaft 11 is placed in the groove of the retaining sleeve 211, moving the knob accessory 23 on the surface of the threaded sleeve shaft 212 presses down on the inclined surface of the wedge plate 223. Under this pressure, the wedge plate 223 pushes the movable shaft 222, thereby controlling the locking pin plate 221 to insert into the retaining groove 14 on the outside of the insert shaft 11 and the insert block 12, facilitating the installation and fixation of the insert shaft 11. To ensure the ease of assembly and disassembly of the chamfering tool assembly 1, the support spring 224 supports the retaining plate 221, allowing the retaining plate 221 to quickly reset after losing pressure. The sleeve 231 rotates and moves on the surface of the threaded cylinder shaft 212, pushing the outer ring 232 so that the movable pressure ring 233 can abut against the surface of the wedge plate 223 for pressure application. At the same time, the movable pressure ring 233 is rotatably mounted on the inner wall of the outer ring 232. When the movable pressure ring 233 abuts against the wedge plate 223, the sleeve 231 can freely twist and rotate, preventing the movable pressure ring 233 from rotating with the outer ring 232.

[0051] Working principle: According to the appendix Figure 3 With appendix Figure 5As shown, during use, the hexagonal knob 165 can be rotated using a tool. The hexagonal knob 165, in conjunction with the limiting plate 164, drives the threaded shaft 163 to rotate. During rotation, the threaded shaft 163 allows the shaped pin 161 to move within the insert shaft 11, thereby controlling the shaped pin 161 to disengage from the insert shaft 11 and separate from the threaded shaft 163. At this point, the operator can, according to processing requirements, sequentially and parallelly place the chamfering cutters 18 onto the surface of the shaped pin 161, increasing or decreasing the number of chamfering cutters 18 to an appropriate level, so that multiple chamfering cutters 18... After the finishing and docking, at this time, according to the chamfering requirements, the position of the chamfering cutter 18 is changed, and multiple pads 17 are attached to the surface of the irregular pin 161 from bottom to top. By rotating the internal hexagon knob 165, the internal hexagon knob 165 drives the limiting plate 164 to rotate inside the insert shaft 11. The rotation of the limiting plate 164 can control the rotation of the threaded shaft 163. The external thread of the threaded shaft 163 engages with the internal thread of the irregular pin 161, thereby controlling the movement of the irregular pin 161 inside the insert shaft 11, so that the pads 17 abut against and press against the surface of the insert shaft 11.

[0052] Secondly, according to the appendix Figure 3 With appendix Figure 4 As shown, by rotating the locking bolt 13 with a tool, the locking bolt 13 is disengaged from the threaded hole of the insert shaft 11 and the insert block 12. At this time, the insert block 12 can be moved to slide inside the groove of the insert shaft 11. Then, the movement of the insert block 12 can drive the inner insert block 15 out of the positioning groove of the insert shaft 11. At this time, the hexagonal knob 165 can be inserted and removed, and the threaded shaft 163 can be pulled out of the insert shaft 11 for easy replacement of the threaded shaft 163.

[0053] Finally, according to the appendix Figure 6 With appendix Figure 7 As shown, the assembled chamfering tool assembly 1 can be inserted into the slot of the retaining sleeve 211. By holding and rotating the sleeve 231, the sleeve 231 can move on the surface of the threaded cylinder shaft 212. The movement of the sleeve 231 can cooperate with the outer ring 232 to push the movable pressure ring 233 to move, so that the movable pressure ring 233 presses down on the surface of the wedge plate 223. The wedge plate 223 being pressed can drive the movable shaft 222 to move, so that the movable shaft 222 pushes the retaining pin plate 221 to engage in the retaining groove 14 between the insert shaft 11 and the insert block 12 for locking and fixing.

[0054] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A chamfering tool for machining graphite boat sheets, characterized in that, The device includes a chamfering cutter assembly (1), which is inserted and installed inside the locking accessory (2). The chamfering cutter assembly (1) includes a insert shaft (11), and a shaft assembly (16) is rotatably installed inside the insert shaft (11). The shaft assembly (16) includes a special-shaped pin (161), and a base (162) is connected to the right side of the special-shaped pin (161). Multiple chamfering cutters (18) are mounted side by side on the surface of the special-shaped pin (161).

2. The chamfering tool for processing graphite boat sheets according to claim 1, characterized in that, The distance between the cutting edges of two adjacent chamfering cutters (18) is 2.5 mm. A disc-shaped protrusion is provided on the right side of the chamfering cutter (18), and an inner groove adapted to the disc-shaped protrusion is provided on the left side of the chamfering cutter (18).

3. A chamfering tool for machining graphite boat sheets according to claim 1, characterized in that, The insert shaft (11) is rotatably mounted with a limiting disk (164) through a rotating groove. The left side of the limiting disk (164) is connected to an internal hexagonal knob (165), and the right side of the limiting disk (164) is connected to a threaded shaft (163). The threaded shaft (163) is inserted into the irregular pin (161) through a threaded hole.

4. A chamfering tool for machining graphite boat sheets according to claim 1, characterized in that, The irregular pin (161) has a triangular cross-section, and the right side of the insertion shaft (11) has a triangular recessed slot that matches the irregular pin (161).

5. A chamfering tool for processing graphite boat sheets according to claim 2, characterized in that, The right side of the insert shaft (11) is connected to a positioning plate (166), and the positioning plate (166) is provided with three positioning blocks on its side. The surface of the irregular pin (161) is fastened with multiple pads (17), and the bottom end of the pad (17) is provided with a triangular slot that matches the irregular pin (161).

6. A chamfering tool for machining graphite boat sheets according to claim 5, characterized in that, An insert block (12) is embedded in the groove on the side of the insert shaft (11). An inner block (15) is connected to the right side of the insert block (12). The inner block (15) is inserted into the insert shaft (11) through a positioning groove. The surface of the insert block (12) is fixed to the insert shaft (11) by two locking bolts (13). The insert shaft (11) and the insert block (12) both have slots (14) on their outer sides.

7. A chamfering tool for machining graphite boat sheets according to claim 1, characterized in that, The locking accessory (2) includes a sleeve assembly (21), which includes a retainer (211). The retainer (211) is sleeved on the outside of the insert shaft (11) and the insert block (12). A threaded cylinder shaft (212) is connected to the left side of the retainer (211), and a side receiving plate (213) is connected to the left side of the threaded cylinder shaft (212). A knob accessory (23) is threaded onto the surface of the threaded cylinder shaft (212). 11) Three snap-fit ​​fittings (22) are arranged around the perimeter. Each snap-fit ​​fitting (22) includes a snap-fit ​​plate (221). A movable shaft (222) is connected to the outside of the snap-fit ​​plate (221), and the movable shaft (222) passes through the inside of the clamping cylinder (211) through a through groove. The end of the snap-fit ​​plate (221) is fixed to the inner wall of the clamping cylinder (211) by a support spring (224). A wedge plate (223) is connected to the outside of the movable shaft (222).

8. A chamfering tool for machining graphite boat sheets according to claim 7, characterized in that, The sleeve (231) includes a sleeve (231), which is threaded onto the surface of the threaded cylinder shaft (212). An outer ring (232) is connected to the right side of the sleeve (231), and a movable pressure ring (233) is movably installed on the inner wall of the outer ring (232) through a ring groove.

9. A method of using a chamfering tool for processing graphite boat sheets according to any one of claims 1-8, characterized in that, The steps are as follows: The first step is to insert the limiting plate (164) and the threaded shaft (163) into the insert shaft (11), and the insert block (12) is fastened to the outside of the insert shaft (11) and fixed by the locking bolt (13); The second step is to place an appropriate number of chamfering cutters (18) side by side on the surface of the irregular pin (161), and rotate the internal hexagonal knob (165) to rotate the threaded shaft (163) to control the irregular pin (161) to move and tighten in the triangular through groove of the insert shaft (11). The third step is to add an appropriate number of pads (17) to the surface of the irregular pin (161) according to the chamfering requirements of the chamfering cutter (18). By the threaded engagement between the threaded shaft (163) and the irregular pin (161), the installation tightness of the chamfering cutter (18) is changed. Fourth step, insert the insert shaft (11) and the inlay block (12) into the retainer (211), and push the retaining accessory (22) by moving the knob accessory (23) so that the retaining accessory (22) presses and installs the insert shaft (11) and the inlay block (12). Place the chamfering cutter (18) on the hollow part of the graphite boat piece so that the chamfering cutter (18) can simultaneously chamfer the corners of the 10 hollowed-out edges of the graphite boat piece.

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