A method for tube, bolt, bar end face burr removal and chamfering

Abstract

The present application provides a pipe, bolt, bar end face burr removal and chamfering method. Including the following steps: step one, using vernier caliper to measure the end face circle size of pipe, bolt, bar, confirm the chuck specification of burr removal and chamfering device; Step two, make integrated shell, tool holder; Step three, assemble the magnet in the groove of the tool holder, the magnetic guide line direction of each tool holder is consistent, the magnetic guide line direction of two tool holders is opposite, ensure that the magnets can attract each other; Step four, assemble the chuck, tool holder, tool, spring, linear bearing, thrust ball bearing, friction plate and integrated shell, assemble into burr removal and chamfering device; Step five, insert the pipe, bolt, bar to be processed from the chuck end into the integrated shell and lock and fix; Step six, manually rotate the handle or connect the charged electric drill with the six-rib connecting rod of the tool holder, rotate the tool holder forward and grind, complete the burr removal and chamfering operation.

Description

Technical Field

[0001] This invention relates to shipbuilding, and in particular to a method for removing burrs and chamfering the end faces of pipes, bolts, and bars. Background Technology

[0002] Shipbuilding is a complex field involving the processing and assembly of various pipes, bolts, and bars. The construction process demands high quality from the end faces of these pipes, bolts, and bars. This is especially true in shipbuilding, where pre-assembly of sections and fabrication of systems are common practices. The process frequently involves cutting large quantities of pipes, bolts, and bars, particularly when using hand-held tools like hand saws and electric grinders, resulting in burrs on the cut surfaces. Some pipes, bolts, and bars also require rounding to meet installation requirements.

[0003] However, in the process of implementing the inventive technical solution in the embodiments of this application, the inventors of this application discovered that the above-mentioned technology has at least the following technical problems:

[0004] Currently, electric grinders and hand drills are commonly used to hold grinding wheels, stone grinding heads, metal chamfering knives, and metal grinding heads for deburring or chamfering. However, due to the lack of a centering device, the quality of deburring and chamfering cannot be guaranteed. Furthermore, the absence of clamping devices, anti-rotation jamming protection, and protective covers makes personnel susceptible to injuries from flying metal shavings, grinding wheels, grinding heads, or cutting tools, as well as mechanical injuries. This not only compromises the quality of the end face but also increases the risk of accidents and raises safety and quality risks. Summary of the Invention

[0005] To address the shortcomings of existing technologies and the issues of burr removal and chamfering grinding quality and spatter damage in pipes, bolts, and bars, this application provides a method for burr removal and chamfering of the end faces of pipes, bolts, and bars. This method utilizes a burr removal and chamfering device. One end of the device uses a chuck to hold and center the pipe, bolt, or bar, while the other end uses a magnetic tool holder to drive a cutting tool. Burr removal and chamfering are performed within a sealed cavity enclosed by an integrated housing, avoiding spatter damage and solving the technical problems of burr removal and chamfering of the end faces of pipes, bolts, and bars.

[0006] The solution adopted by the embodiments of this application to solve the technical problem is:

[0007] A method for removing burrs and chamfering the end faces of pipes, bolts, and bars, comprising the following steps:

[0008] Step 1: Use a vernier caliper to measure the outer diameter of the end face of the pipe, bolt, or bar stock to confirm the chuck specifications for the burr removal and chamfering device. The nominal diameter of the chuck should be greater than the outer diameter of the pipe, bolt, or bar stock. Select a standard three-jaw or four-jaw chuck.

[0009] Step 2: Based on the selected chuck specifications and the outer diameter of the end face of the tubes, bolts, and bars to be processed, manufacture an integrated outer shell and tool holder;

[0010] Step 3: Assemble the magnets into the grooves of the tool holders. During assembly, the magnetic guide lines of each tool holder should be aligned, while the magnetic guide lines of two tool holders should be aligned in opposite directions to ensure that the magnets attract each other.

[0011] Step 4: Assemble the chuck, tool holder, cutting tool, spring, linear bearing, thrust ball bearing, friction plate, and integrated housing to form a burr removal and chamfering device.

[0012] Step 5: Insert the pipes, bolts, and bars to be processed into the integrated housing from the chuck end and lock them in place.

[0013] Step 6: Manually rotate the handle or connect the cordless electric drill to the hexagonal connecting rod of the tool holder, rotate the tool holder forward to grind, and complete the burr removal and chamfering operations.

[0014] Furthermore, in step five, after the tube, bolt, or bar is inserted into the end face of the cutter and tightened, it needs to be pulled back 10-20mm.

[0015] Furthermore, in step six, the tool holder is fed in batches, with each batch feeding 2mm.

[0016] Positive effects: The technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0017] 1. Because the embodiments of this application adopt the technical means of setting a chuck at one end of the integrated shell to hold the tube, bolt and bar, the tube, bolt and bar can be centered by the chuck and have concentricity, which effectively solves the technical problem of centering when removing burrs and chamfering tubes, bolts and bars in the prior art, and thus achieves the technical effect of ensuring the quality of burr removal and chamfering.

[0018] 2. Because the embodiments of this application adopt the technical means of setting a tool holder at the other end of the integrated shell and inserting the tool on the tool holder and extending into the cavity of the integrated shell, the tool performs burr removal and chamfering operations on pipes, bolts and bars in a closed environment, which effectively solves the technical problem of safety in burr removal and chamfering of pipes, bolts and bars in the prior art, thereby achieving the technical effect of avoiding splashing injury and ensuring construction safety.

[0019] 3. Because the embodiments of this application employ the technical means of assembling a spring on the feed rotation shaft of the tool holder and embedding magnets on the two tool holders, the tool holder has rebound and magnetism. During the tool feeding process, only uniform pressing is required. When the tool gets stuck with the end face of the tube, bolt, or bar, it will automatically disengage. At the same time, due to the action of the spring, after the feed pressure is reduced, the tool will automatically reset. This effectively solves the technical problem of excessive feed amount and mechanical locking leading to accidents in the prior art, thereby achieving the technical effect of automatic tool disengagement and reset.

[0020] It is suitable as a method for removing burrs and chamfering the end faces of pipes, bolts, and bars. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 Exploded view of the deburring and chamfering device;

[0023] Figure 2 Schematic diagram of the deburring and chamfering device;

[0024] Figure 3 Front view of the deburring and chamfering device;

[0025] Figure 4 GG view of the deburring and chamfering device;

[0026] Figure 5 Side view of the deburring and chamfering device;

[0027] Figure 6 This is a schematic diagram of the tool holder;

[0028] Figure 7 Schematic diagram of external burr removal and chamfering tools;

[0029] Figure 8 Schematic diagram of internal burr removal and chamfering tools;

[0030] Figure 9 This is a schematic diagram of the handle.

[0031] In the picture:

[0032] 0. Pipes, bolts, and bars;

[0033] 1. Integrated outer shell,

[0034] 11. Wrench through hole,

[0035] 12. Chuck connecting ring;

[0036] 2. Base;

[0037] 3. Chuck;

[0038] 31. Chuck clamping wrench,

[0039] 4. Cutting tools;

[0040] 41. Deburring and chamfering tools.

[0041] 42. Internal burr removal and chamfering tools;

[0042] 5. Knife holder,

[0043] 51. Feed rotary axis,

[0044] 52.Protruding shoulders,

[0045] 53. Hexagonal connecting rod through hole,

[0046] 54. Groove

[0047] 55. Hexagonal connecting rod,

[0048] 56. Handle;

[0049] 6. Friction pads;

[0050] 7. Spring;

[0051] 8. Thrust ball bearing;

[0052] 9. Linear bearings;

[0053] 10. Magnet. Detailed Implementation

[0054] 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. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0055] As shown in the figure, a method for removing burrs and chamfering the end faces of pipes, bolts, and bars includes the following steps:

[0056] Step 1: Use calipers to measure the outer diameter of the end face of the pipe, bolt, or bar stock 0. Confirm the chuck 3 specification for the deburring and chamfering device. The selection principle is: the nominal diameter of chuck 3 > the outer diameter of the pipe, bolt, or bar stock 0. Use a standard three-jaw or four-jaw chuck 3. Simultaneously, measure the insertion depth into chuck 3 to determine suitability for this method: If the insertion depth is greater than the thickness of chuck 3, the deburring and chamfering device can be safely used for internal deburring. If the insertion depth is greater than the thickness of chuck 3 + 1 / 2 the maximum diameter of the external deburring and chamfering tool 41, the device can be safely used for external deburring and chamfering. If the insertion depth of the pipe, bolt, or bar stock 0 does not meet the above rules with the tool 4 dimension, this method is not recommended, as it may damage the tool 4, increasing processing costs. Since this deburring and chamfering device uses a fully enclosed integrated shell and friction connection, safety is not a concern. Use vernier calipers to measure the burr size on the end face of the pipe, bolt, and bar to confirm the deburring depth. The end face chamfer needs to be calculated in advance based on the chamfer outer circle size, wall thickness, and end face inclination angle. To avoid complex calculations affecting construction efficiency, it is recommended to use a batch feeding method, that is, feed 2mm each time, take out the pipe, bolt, or bar to observe or measure whether it meets the requirements. If it does not meet the requirements, feed 2mm again until it does.

[0057] Step 2: Based on the selected chuck 3 specifications and the outer diameter of the end face of the tube, bolt, and bar stock 0 to be processed, manufacture the integrated housing 1 and tool holder 5. To facilitate design, production, and subsequent interchangeability of parts, the tool holder 5 adopts a mirror design principle. The tool holder 5 is not only the fixing, rotating, forward, and backward device for the tool 4, but also the power transmission device for the entire burr removal and chamfering device. The end of the tool holder 5 is connected to the handle 56 or power tool to provide rotational power to ensure the normal rotation of the tool 4. To ensure that the tool 4 can perform its normal function and ensure its durability, the outer diameter of the feed rotary shaft 51 is 0.2-0.5mm smaller than the inner diameter of the linear bearing 9.

[0058] Step 3: Assemble the magnet 10 with the groove 54 of the tool holder 5, and fix it with quick-drying glue. It can be used after it has completely solidified. During assembly, it is necessary to ensure that the magnetic guide line of each tool holder 5 is in the same direction, and at the same time, ensure that the magnetic guide line of the two tool holders is in opposite directions, so that the magnets 10 can attract each other. According to the outer diameter, wall thickness and material hardness of the cutting tube, bolt, bar 0 and the friction coefficient of the friction plate 6, select an appropriate number, diameter and thickness of magnets 10 to ensure sufficient cutting rotation transmission force and safety. While ensuring the cutting force, it is also necessary to ensure that the tool holder connection can be disengaged in time in case of mechanical jamming to ensure safety.

[0059] Step 4: Assemble the chuck 3, tool holder 5, cutting tool 4, spring 7, linear bearing 9, thrust ball bearing 8, and integrated housing 1. The assembly must be carried out in sequence. When assembling, spring 7 with appropriate wire diameter must be selected. The wire diameter of stainless steel and carbon steel springs is greater than that of copper and non-metallic springs. The specific size of the spring wire diameter must be selected according to the actual elastic force of the springs in the same batch to meet the usage requirements. Spring 7 should ensure sufficient rebound force, while avoiding excessive rebound force that may affect the feed stroke of tool holder 5.

[0060] Step 5: Insert the pipe, bolt, or bar stock 0 to be processed from the chuck 3 end to the bottom. To prevent locking, back 10-20mm after inserting it to the bottom and clamp the chuck 3. Secure the manual rotating handle 56 or the cordless electric drill to the small end of the tool holder 5 using a standard hexagonal connecting rod 55. While rotating the tool holder 5, slowly press it in. Because of the rebound spring 7 and the magnetic tool holder 5, the feeding process only requires even pressing. There is no need to worry about excessive feed causing mechanical locking and accidents. When the tool 4 gets stuck with the end face of the pipe, bolt, or bar stock 0, it will automatically disengage. At the same time, due to the action of the spring 7, the tool 4 will automatically reset after the feed pressure is reduced.

[0061] Step 6: Rotate the tool holder 5 forward to grind, completing the burr removal and chamfering.

[0062] The burr removal and chamfering device includes an integrated housing 1, a base 2, a chuck 3, a cutting tool 4, a tool holder 5, a friction plate 6, a spring 7, a thrust ball bearing 8, a linear bearing 9, and a magnet 10.

[0063] The integrated outer shell 1 is a cylindrical structure used to house tubes, bolts, and bars 0. Deburring and chamfering operations are carried out in the enclosed, sealed chamber to avoid safety accidents caused by splashing.

[0064] The base 2 is fixed to the lower part of the integrated shell 1, supporting the integrated shell 1 to maintain stability, so that the deburring and chamfering operations can be carried out smoothly;

[0065] The chuck 3 is located at one end of the integrated housing 1 and is used to clamp the tube, bolt, and bar stock 0 and center them to ensure the quality of burr removal and chamfering operations.

[0066] The cutting tool 4 is set in the receiving cavity of the integrated housing 1. The cutting tool 4 is collinear with the center of the chuck 3 and is used to remove burrs and chamfer the tube, bolt and bar 0.

[0067] The tool holder 5 is a stepped hollow shaft. Two tool holders 5 are mirror-assembled on the other end of the integrated housing 1 for fixing the tool 4, rotating during burr removal and chamfering processes, feeding, and connecting to external power. One tool holder 5 extends into the cavity of the integrated housing 1 and inserts the tool 4.

[0068] The friction plate 6 is positioned between the two tool holders 5, and they are linked together to transmit power.

[0069] The linear bearing 9 is disposed in a cavity facing the chuck 3 for mounting the tool holder 5, which extends into the integrated housing 1.

[0070] Spring 7 is mounted on tool holder 5 that extends into integrated housing 1, so that tool 4 can automatically reset after feed pressure is reduced;

[0071] The thrust ball bearing 8 is mounted on the tool holder 5, which extends into the integrated housing 1, and is located inside the spring 7.

[0072] Magnet 10 is embedded in the adjacent part of the two tool holders 5, making the tool holders magnetic;

[0073] The tube, bolt, and bar are clamped at one end of the integrated housing 1 by the chuck 3, and the tool holder 5 of the insert tool 4 is set at the other end of the integrated housing 1. The tool holder 5 drives the tool 4 to perform burr removal and chamfering operations in the cavity of the integrated housing 1.

[0074] Preferably, the integrated housing 1 has a chuck connecting ring 12 in the chuck 3 end cavity for connecting the chuck 3; the integrated housing 1 has wrench through holes 11 arranged radially for the chuck to clamp the wrench 31 through the wrench through holes 11 to drive the pawl to clamp the pipe, bolt, or bar stock 0; the integrated housing 1 has bearing through holes and through hole bosses at the opposite ends of the chuck 3 for assembling and fixing linear bearings 9 and thrust ball bearings 8.

[0075] Preferably, the tool holder 5 includes a feed rotation shaft 51 and a shoulder 52. The feed rotation shaft 51 is provided at one end of the tool holder 5, and the shoulder 52 is provided at the other end. A hexagonal connecting rod through hole 53 is provided in the middle of the tool holder 5. Grooves 54 are arranged on the outer side of the shoulder 52 with the hexagonal connecting rod through hole 53 as the center, for embedding magnets 10. In the tool holder 5 extending into the integrated housing 1, a spring 7 and a thrust ball bearing 8 are sequentially mounted on the feed rotation shaft 51 and connected to a linear bearing 9. The shank of the tool 4 is inserted into the hexagonal connecting rod through hole 53. The hexagonal connecting rod through hole 53 of the tool holder 5, which is mirrored thereon, is used to connect a hexagonal connecting rod 55. A handle 56 or a power tool is provided at the end of the hexagonal connecting rod 55 to provide rotational power to drive the tool 4 to rotate.

[0076] Preferably, the feed rotation axis 51 of the tool holder 5 is engraved with standard scale lines to confirm the feed depth.

[0077] Preferably, the cutting tool 4 includes an external burr removal and chamfering tool 41 and an internal burr removal and chamfering tool 42, wherein the grinding head of the external burr removal and chamfering tool 41 is V-shaped, and the grinding head of the internal burr removal and chamfering tool 42 is inverted V-shaped; the shank of the cutting tool 4 has a hexagonal structure, so that the cutting tool 4 can be inserted into the hexagonal connecting rod through hole 53 of the tool holder 5.

[0078] Preferably, the friction pad 6 is made of soft silicone and soft rubber material with high friction and a certain degree of softness.

[0079] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages:

[0080] Because a chuck 3 is provided at one end of the integrated housing 1 to hold the tube, bolt, and bar stock 0, the tube, bolt, and bar stock 0 can be centered by the chuck 3 and have concentricity, which ensures the quality of burr removal and chamfering.

[0081] Since a tool holder 5 is provided at the other end of the integrated housing 1, and the tool 4 is inserted into the cavity of the integrated housing 1, the tool 4 performs burr removal and chamfering operations on pipes, bolts, and bars 0 in a closed environment to avoid splashing injuries and ensure construction safety.

[0082] Because spring 7 is mounted on the feed rotation shaft 51 of tool holder 5 and magnets 10 are embedded on the two tool holders 5, tool holder 5 has rebound and magnetism. During the feeding process of tool 4, it is only necessary to press evenly. There is no need to worry about excessive feed amount causing mechanical lock-up or even accidents. When tool 4 is stuck with the end face of pipe, bolt, or bar 0, it will automatically disengage. At the same time, due to the action of spring 7, after the feed pressure is reduced, tool 4 will automatically reset.

[0083] It is worth noting that all contents not described in detail in the specification are existing technologies known to those skilled in the art, and the model parameters of chuck 3, friction plate 6, spring 7, thrust ball bearing 8, linear bearing 9, magnet 10, hexagonal connecting rod 55 and handle 56 are not specifically limited and can be determined using conventional equipment. Electrical control components not mentioned in this technical solution are not shown in the figure because they are existing technologies, and will not be described here.

[0084] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for removing burrs and chamfering the end face of a pipe, bolt or bar, characterized by: applying a burr removing and chamfering device, which comprises an integrated housing (1), a base (2), a chuck (3), a tool (4), a tool holder (5), a friction plate (6), a spring (7), a thrust ball bearing (8), a linear bearing (9) and a magnet (10); the integrated housing (1) is a cylindrical structure for accommodating the pipe, bolt or bar (0), and the burr removing and chamfering operation is performed in a closed chamber of the cage; the base (2) is fixed at the lower part of the integrated housing (1) to support the integrated housing (1) and keep it stable; the chuck (3) is arranged at one end of the integrated housing (1) to clamp the pipe, bolt or bar (0); the tool (4) is arranged in the accommodation cavity of the integrated housing (1), and the center of the tool (4) is collinear with the chuck (3) to remove burrs and chamfer the pipe, bolt or bar (0); the tool holder (5) is a stepped hollow shaft, and two tool holders (5) are mirror image assembled at the other end of the integrated housing (1) to fix the tool (4), rotate during the burr removing and chamfering process, feed and connect with the external power; one tool holder (5) extends into the chamber of the integrated housing (1) and inserts the tool (4); the friction plate (6) is arranged between the two tool holders (5) to link them for power transmission; the linear bearing (9) is arranged in the chamber opposite to the chuck (3) to assemble the tool holder (5) extending into the integrated housing (1); the spring (7) is assembled on the tool holder (5) extending into the integrated housing (1) to enable the tool (4) to automatically reset after the feed pressure is reduced; the thrust ball bearing (8) is assembled on the tool holder (5) extending into the integrated housing (1) and located inside the spring (7); the magnet (10) is inlaid in the adjacent part of the two tool holders (5) to make the tool holder have magnetism; comprising the following steps: step one, measuring the outer circle size of the end face of the pipe, bolt or bar (0) with a vernier caliper to confirm the specification of the chuck (3) of the burr removing and chamfering device, the pass diameter of the chuck (3) is greater than the outer diameter of the pipe, bolt or bar (0), and the chuck (3) selects a standard three-jaw or four-jaw chuck; step two, making the integrated housing (1) and the tool holder (5) according to the specification of the selected chuck (3) and the outer circle size of the end face of the pipe, bolt or bar (0) to be machined; step three, assembling the magnet (10) in the groove (54) of the tool holder, and during assembly, the magnetic guide lines of each tool holder (5) are consistent in direction, and the magnetic guide lines of the two tool holders (5) are opposite in direction to ensure that the magnets (10) attract each other; step four, assembling the chuck (3), tool holder (5), tool (4), spring (7), linear bearing (9), thrust ball bearing (8), friction plate (6) and integrated housing (1) to form the burr removing and chamfering device; step five, inserting the pipe, bolt or bar (0) to be machined from the end of the chuck (3) into the integrated housing (1) and locking and fixing it. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Step six, manually rotate the handle (56) and six-prong connecting rod (55) of the knife seat (5) connection, rotating the knife seat (5) forward into grinding, complete the deburring, chamfering operation.

2. A method for removing end face burrs and chamfering of pipes, bolts and bars according to claim 1, characterized in that: In step five, after the pipe, bolt or bar (0) is inserted into the end face of the cutter (4) and clamped tightly, it needs to be withdrawn 10-20 mm backward.

3. A method for removing end face burrs and chamfering of pipes, bolts and bars according to claim 2, characterized in that: In step six, the feeding process of the knife seat (5) is divided into batches, each time feeding 2 mm.

4. A method for removing end face burrs and chamfering of pipes, bolts and bars according to claim 1, characterized in that: In step one, the pipe, bolt or bar (0) is clamped at one end of the integrated housing (1) by the chuck (3), and the knife seat (5) of the inserted cutter (4) is arranged at the other end of the integrated housing (1), and the knife seat (5) drives the cutter (4) to perform burr removal and chamfering operation in the cavity of the integrated housing (1).

5. A method for removing end face burrs and chamfering of pipes, bolts and bars according to claim 1, characterized in that: The integrated housing (1) is assembled with a chuck connecting ring (12) in the end chamber of the chuck (3) for connecting the chuck (3); there are wrench through holes (11) arranged radially on the integrated housing (1) for the chuck clamping wrench (31) to pass through the wrench through holes (11) to drive the pawl to clamp the pipe, bolt or bar (0); there are bearing through holes and through hole bosses on the opposite end of the integrated housing (1) where the chuck (3) is assembled for assembling and fixing the linear bearing (9) and the thrust ball bearing (8).

6. A method for removing end face burrs and chamfering of pipes, bolts and bars according to claim 1, characterized in that: The knife seat (5) includes a feeding rotating shaft (51) and a shoulder (52); One end of the knife seat (5) is provided with a feeding rotating shaft (51), and the other end is provided with a shoulder (52); the middle part of the knife seat (5) is provided with a six-prong connecting rod through hole (53), and the outer side of the shoulder (52) is arranged with a groove (54) centered on the six-prong connecting rod through hole (53) for embedding a magnet (10); in the knife seat (5) extending into the integrated housing (1), the feeding rotating shaft (51) is sequentially assembled with a spring (7) and a thrust ball bearing (8), and is connected with a linear bearing (9), and the handle of the cutter (4) is inserted into the six-prong connecting rod through hole (53); the six-prong connecting rod through hole (53) of the mirror image knife seat (5) is used for connecting the six-prong connecting rod (55), and the end of the six-prong connecting rod (55) is provided with a handle (56) to provide rotating power to drive the cutter (4) to rotate.

7. A method for removing end face burrs and chamfering of pipes, bolts and bars according to claim 1, characterized in that: The feeding rotating shaft (51) of the knife seat (5) is engraved with standard scale lines for confirming the feeding depth.

8. The method of claim 1, characterized in that: The tool (4) comprises an outer burr removal and chamfering tool head (41) and an inner burr removal and chamfering tool (42), wherein the grinding head of the outer burr removal and chamfering tool head (41) is V-shaped, and the grinding head of the inner burr removal and chamfering tool (42) is inverted V-shaped; the shank of the tool (4) is hexagonal in structure, so that the tool (4) can be inserted into the hexagonal connecting rod through hole (53) of the tool holder (5).

9. The method of claim 1, characterized in that: The friction plate (6) is made of soft silicone and soft rubber.

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