Boring and chamfering mechanism

Abstract

The utility model discloses a boring and chamfering mechanism, and relates to the technical field of machine tool structures, the boring and chamfering mechanism comprises a cutter mounting seat, a rough boring cutter, a fine boring cutter and a chamfering cutter which are detachable are arranged on the cutter mounting seat, the rough boring cutter, the fine boring cutter and the chamfering cutter are located on the same plane, and the rough boring cutter and the fine boring cutter are located on the two sides of the cutter mounting seat respectively; the extension lines of the central axes of the rough boring cutter, the fine boring cutter and the chamfering cutter intersect at the central axis of the cutter mounting base, and the distance between the blade face of the rough boring cutter and the central axis of the cutter mounting base is larger than that between the blade face of the fine boring cutter and the central axis of the cutter mounting base. And the distances from the rough boring cutter, the fine boring cutter and the chamfering cutter to the central axis of the cutter mounting seat are adjustable. According to the boring and chamfering mechanism, rough and fine boring of workpieces can be continuously carried out, meanwhile, chamfering machining can be carried out through simple adjustment, complex tool setting is omitted, and the production efficiency is greatly improved.

Description

Technical Field

[0001] This application relates to the technical field of machine tool structures, and particularly to a boring and chamfering mechanism. Background Art

[0002] Boring is one of the most common hole machining methods in machining, mainly used for rough and finish machining of holes. Boring machining is generally divided into rough boring, semi-finish boring and finish boring, and continuous and efficient rough and finish machining is the machining concept pursued in the field of metal processing. For boring machining with a large quantity and high precision requirements, a combination of rough and finish boring is generally used for machining. However, in the existing machine tool design, rough boring and finish boring are carried out separately. After rough boring is completed, a finish boring tool needs to be replaced, and the finish boring tool needs to be adjusted before finish boring can be carried out. In this way, continuous and efficient machining cannot be achieved. In addition, if boring is still required, the previous boring tool needs to be removed and a chamfering tool needs to be installed, which greatly reduces the production efficiency. Summary of the Utility Model

[0003] This application aims to solve at least one of the above technical problems in the prior art to some extent. For this reason, the embodiments of this application provide a boring and chamfering mechanism, which can continuously carry out rough and finish boring of workpieces. At the same time, chamfering machining can be carried out with simple adjustment, eliminating the complicated tool setting steps and greatly improving the production efficiency.

[0004] According to the boring and chamfering mechanism provided by the embodiments of this application, it includes a tool mounting seat. A detachable rough boring tool, a finish boring tool and a chamfering tool are arranged on the tool mounting seat. The rough boring tool, the finish boring tool and the chamfering tool are located in the same plane. The rough boring tool and the finish boring tool are respectively located on both sides of the tool mounting seat. The extension lines of the central axes of the rough boring tool, the finish boring tool and the chamfering tool intersect at the central axis of the tool mounting seat. The distance between the cutting edge surface of the rough boring tool and the central axis of the tool mounting seat is less than the distance between the cutting edge surface of the finish boring tool and the central axis of the tool mounting seat. The distances between the rough boring tool, the finish boring tool and the chamfering tool and the central axis of the tool mounting seat are adjustable.

[0005] According to the boring and chamfering mechanism described in the embodiments of this application, the tool mounting seat includes a first mounting hole, and a first locking structure is arranged in the first mounting hole. The rough boring tool inserted into the first mounting hole is positioned and fixed through the first locking structure.

[0006] According to the boring and chamfering mechanism described in the embodiments of this application, the first locking structure includes a first positioning member. The first positioning member is inserted into the rough boring tool along a direction perpendicular to the central axis of the rough boring tool. The first mounting hole is provided with a first positioning groove, and the part of the first positioning member exposed outside the rough boring tool is located in the first positioning groove.

[0007] According to the boring and chamfering mechanism described in the embodiments of the present application, the first locking structure further includes a first locking member, the first locking member is threadedly connected to the tool mounting seat, and the first locking member can enter the first mounting hole to press against the rough boring tool.

[0008] According to the boring and chamfering mechanism described in the embodiments of the present application, one side of the rough boring tool facing the first locking member is a first inclined surface, the first locking member abuts against the first inclined surface, and from one end of the first inclined surface close to the cutting edge surface of the rough boring tool to the other end, the perpendicular distance between the first inclined surface and the central axis of the rough boring tool gradually increases.

[0009] According to the boring and chamfering mechanism described in the embodiments of the present application, one end of the rough boring tool close to the central axis of the tool mounting seat is threadedly connected with a first adjusting member, and the first adjusting member is used to adjust the distance between the cutting edge surface of the rough boring tool and the central axis of the tool mounting seat.

[0010] According to the boring and chamfering mechanism described in the embodiments of the present application, the tool mounting seat further includes a second mounting hole, the second mounting hole is provided with a second locking structure, and the chamfering tool inserted into the second mounting hole is positioned and limited by the second locking structure.

[0011] According to the boring and chamfering mechanism described in the embodiments of the present application, the second locking structure includes a second positioning member and a second locking member, the second positioning member is inserted into the chamfering tool along a direction perpendicular to the central axis of the chamfering tool, the second mounting hole is provided with a second positioning groove, a part of the second positioning member exposed outside the chamfering tool is located in the second positioning groove, the second locking structure further includes a second locking member, the second locking member is threadedly connected to the tool mounting seat, and the second locking member can enter the second mounting hole to press against the chamfering tool.

[0012] According to the boring and chamfering mechanism described in the embodiments of the present application, one side of the chamfering tool facing the second locking member is a second inclined surface, the second locking member abuts against the second inclined surface, and from one end of the second inclined surface close to the cutting edge surface of the chamfering tool to the other end, the perpendicular distance between the second inclined surface and the central axis of the chamfering tool gradually increases.

[0013] According to the boring and chamfering mechanism described in the embodiments of the present application, the tool mounting seat further includes a third mounting hole, and the finish boring tool is locked by a third fastener after being inserted into the third mounting hole.

[0014] The above boring and chamfering mechanism has at least the following beneficial effects: integrating the rough boring tool, the finish boring tool, and the chamfering tool on the tool mounting seat, and making the rough boring tool, the finish boring tool, and the chamfering tool in the same plane, and the distance from the cutting edge of the rough boring tool to the central axis of the tool mounting seat is less than the distance from the cutting edge of the finish boring tool to the central axis of the tool mounting seat. When in use, the distance from the cutting edge of the chamfering tool to the central axis of the tool mounting seat is less than the distance from the cutting edge of the finish boring tool to the central axis of the tool mounting seat, so that when machining a hole, the rough boring tool first processes the workpiece. After the rough boring tool finishes processing, rotate the tool mounting seat to turn the finish boring tool to the processing position. The whole process does not require clamping and adjustment of the finish boring tool again, realizing continuous operation of rough boring and finish boring, and greatly improving the machining efficiency of the hole. When the rough boring and finish boring of the hole are completed, move the workpiece away from the tool mounting seat, adjust the cutting edge of the chamfering tool to be higher than the finish boring tool, and then the chamfering treatment of the hole can be carried out without adjusting the rough boring tool and the finish boring tool. After chamfering, adjust the cutting edge of the chamfering tool to be lower than the rough boring tool. In this way, when processing continuously, there is no need to repeatedly clamp or adjust the rough boring tool and the finish boring tool, and only the chamfering tool that does not require precise positioning needs to be adjusted, saving the process of repeatedly clamping and positioning the rough boring tool and the finish boring tool, greatly improving the production efficiency. At the same time, simple adjustment can achieve rapid hole chamfering treatment after rough boring and finish boring. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present application will be further described below with reference to the drawings and embodiments;

[0016] Figure 1 is a schematic structural diagram of an embodiment of the present application Figure 1 ;

[0017] Figure 2 is Figure 1 a sectional view taken along the A-A direction in

[0018] Figure 3 is a sectional view of the tool mounting seat in an embodiment of the present application;

[0019] Figure 4 is Figure 3 a schematic diagram taken along the B direction in

[0020] Figure 5 is a schematic structural diagram of the rough boring tool in an embodiment of the present application;

[0021] Figure 6 is a schematic structural diagram of the tool mounting seat in an embodiment of the present application;

[0022] Figure 7 is Figure 6 a sectional view taken along the C-C direction in

[0023] Figure 8 is a schematic structural diagram of the chamfering tool in an embodiment of the present application.

[0024] Reference numerals: tool mounting base 100, second mounting hole 110, screw hole 120, third mounting hole 130, pin hole 131, second positioning groove 132, first mounting hole 140, first positioning groove 141, rough boring tool 200, first inclined surface 210, threaded hole 220, positioning hole 230, first positioning member 300, first locking member 400, chamfering tool 500, second inclined surface 510. Detailed implementation manners

[0025] This part will describe in detail the specific embodiments of the present application. The preferred embodiments of the present application are shown in the accompanying drawings. The function of the accompanying drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present application. However, it should not be construed as a limitation on the protection scope of the present application.

[0026] In the description of the present application, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the present application.

[0027] In the description of the present application, the meaning of "several" is one or more, the meaning of "multiple" is more than two, and understandings such as "greater than", "less than", "exceeding", etc. do not include the recited number, and understandings such as "above", "below", "within", etc. include the recited number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0028] In the description of the present application, unless otherwise clearly defined, words such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present application in combination with the specific content of the technical solution.

[0029] Refer to Figures 1 to 3, the boring and chamfering mechanism of the embodiment of the present application includes a tool mounting seat 100. A detachable rough boring tool 200, a finish boring tool, and a chamfering tool 500 are arranged on the tool mounting seat 100. The rough boring tool 200, the finish boring tool, and the chamfering tool 500 are set to be detachable to facilitate quickly replacing different tools according to different hole sizes subsequently. The rough boring tool 200, the finish boring tool, and the chamfering tool 500 are located in the same plane. The rough boring tool 200 and the finish boring tool are respectively located on both sides of the tool mounting seat 100. The extension lines of the central axes of the rough boring tool 200, the finish boring tool, and the chamfering tool 500 intersect at the central axis of the tool mounting seat 100. The distance between the cutting edge surface of the rough boring tool 200 and the central axis of the tool mounting seat 100 is less than the distance between the cutting edge surface of the finish boring tool and the central axis of the tool mounting seat 100. In this way, when performing rough and finish boring continuously, there is no need to adjust the rough boring tool 200 and the finish boring tool again. The distances between the rough boring tool 200, the finish boring tool, and the chamfering tool 500 from the central axis of the tool mounting seat 100 are adjustable, which is convenient for adjusting the machining amount of rough boring and the machining amount of finish boring according to the actual situation.

[0030] During use, the distance between the cutting edge surface of the chamfering tool 500 and the central axis of the tool mounting seat 100 is set to be less than the distance between the cutting edge surface of the finish boring tool and the central axis of the tool mounting seat 100, so that when machining a hole, the rough boring tool 200 first processes the workpiece; after the rough boring tool 200 finishes machining, rotate the tool mounting seat 100 to turn the finish boring tool to the machining position, and then rotate the workpiece. Without re-clamping or adjusting the finish boring tool again, slow feeding can be carried out to realize the finish boring machining of the hole, achieving continuous operation of rough boring and finish boring, and greatly improving the machining efficiency of the hole; when the rough boring and finish boring of the hole are completed, move the workpiece away from the tool mounting seat 100, adjust the cutting edge surface of the chamfering tool 500 to be higher than the finish bored hole, and then the chamfering treatment of the hole can be carried out without adjusting the rough boring tool 200 and the finish boring tool; after chamfering, adjust the cutting edge surface of the chamfering tool 500 to be lower than the rough boring tool 200. In this way, during continuous machining, there is no need to repeatedly clamp or adjust the rough boring tool 200 and the finish boring tool, and only the chamfering tool that does not require precise positioning needs to be adjusted, saving the process of repeatedly clamping and positioning the rough boring tool 200 and the finish boring tool many times, greatly improving the production efficiency. At the same time, simple adjustment can realize rapid hole chamfering treatment after rough boring and finish boring.

[0031] Specifically, as Figure 3 and Figure 4As shown, the tool mounting seat 100 includes a first mounting hole 140. A first locking structure is provided in the first mounting hole 140. The rough boring tool 200 inserted into the first mounting hole 140 is positioned and fixed through the first locking structure. Among them, the first locking structure includes a first positioning member 300. The first positioning member 300 is inserted into the rough boring tool 200 along a direction perpendicular to the central axis of the rough boring tool 200. The first mounting hole 140 is provided with a first positioning groove 141. The part of the first positioning member 300 exposed outside the rough boring tool 200 is located in the first positioning groove 141. The rotation of the rough boring tool 200 is restricted through the cooperation of the first positioning member 300 and the first positioning groove 141, avoiding the situation of self-rotation of the rough boring tool 200 during operation.

[0032] In some embodiments, as Figure 5 shown, a positioning hole 230 for inserting the first positioning member 300 is provided on the side surface of the rough boring tool 200. In the embodiment of the present application, the first positioning member 300 is preferably a pin shaft.

[0033] In some embodiments, the first locking structure further includes a first locking member 400. The first locking member 400 is threadedly connected to the tool mounting seat 100, and the first locking member 400 can enter the first mounting hole 140 to press against the rough boring tool 200. Specifically, the tool mounting seat 100 is provided with a threaded hole 120. A counterbore is provided at one end of the threaded hole 120 away from the first mounting hole 140 so that the first locking member 400 can be hidden in the tool mounting seat 100 after being threadedly connected to the tool mounting seat 100. In the embodiment of the present application, the first locking member 400 is a bolt. The threaded hole 120 communicates with the first mounting hole 140. Under the action of the thread, the bolt can press and fix the rough boring tool 200 in the first mounting hole 140 with a certain pre-pressure.

[0034] In other some embodiments, as Figure 2 and Figure 5 shown, the side of the rough boring tool 200 facing the first locking member 400 is a first inclined surface 210. The first locking member 400 abuts against the first inclined surface 210. From one end of the first inclined surface 210 close to the cutting edge surface of the rough boring tool 200 to the other end, the perpendicular distance between the first inclined surface 210 and the central axis of the rough boring tool 200 gradually increases. When the first locking member 400 abuts against the first inclined surface 210, during the process of machining the workpiece with the rough boring tool 200, the rough boring tool 200 can only retract into the first mounting hole 140 under the action of force, avoiding the situation of overcutting caused by a sharp increase in the feed rate due to excessive protrusion of the rough boring tool 200 during work, and effectively protecting the workpiece.

[0035] Among them, the included angle between the first inclined surface 210 and the central axis of the rough boring tool 200 is 3° - 10°. In the embodiment of the present application, the included angle between the first inclined surface 210 and the central axis of the rough boring tool 200 is preferably 3.5°.

[0036] In some embodiments, a first adjusting member is threadedly connected to one end of the rough boring tool 200 close to the central axis of the tool mounting seat 100. The first adjusting member is used to adjust the distance between the cutting edge surface of the rough boring tool 200 and the central axis of the tool mounting seat 100. Among them, as Figure 5 shown, a threaded hole 220 for threadedly connecting the first adjusting member is provided at one end of the rough boring tool 200 without a cutting edge surface. When installed in the first mounting hole 140, the first adjusting member abuts against the bottom of the first mounting hole 140. In the embodiments of the present application, the first adjusting member is preferably a bolt. When it is necessary to adjust the feed rate of the rough boring tool 200, the first adjusting member can be screwed. At the same time, the mutual cooperation of the first adjusting member and the first locking member 400 can effectively reduce the probability that the rough boring tool 200 retracts during processing and affects the rough boring accuracy.

[0037] In some embodiments, as Figure 6 and Figure 7 shown, the tool mounting seat 100 further includes a second mounting hole 110. The second mounting hole 110 is provided with a second locking structure. The chamfering tool 500 inserted into the second mounting hole 110 is positioned and limited by the second locking structure. The second locking structure includes a second positioning member and a second locking member. The second positioning member is inserted into the chamfering tool 500 along a direction perpendicular to the central axis of the chamfering tool 500. The second mounting hole 110 is provided with a second positioning groove 132. The part of the second positioning member exposed outside the chamfering tool 500 is located in the second positioning groove 132. The second locking structure further includes a second locking member. The second locking member is threadedly connected to the tool mounting seat 100, and the second locking member can enter the second mounting hole 110 to press against the chamfering tool 500.

[0038] The rotation of the chamfering tool 500 is restricted by the cooperation of the second positioning member and the second positioning groove 132, avoiding the situation that the chamfering tool 500 rotates during operation.

[0039] Among them, the second positioning member is preferably a pin shaft, and a pin hole 131 for inserting the second positioning member is provided on the side surface of the chamfering tool 500.

[0040] Among them, the second locking member is a bolt. The screw hole 120 communicates with the second mounting hole 110. Under the action of the thread, the bolt can press and fix the chamfering tool 500 in the second mounting hole 110 with a certain pre-pressure. Further, as Figure 7 shown, the tool mounting seat 100 is provided with a screw hole. A counterbore is provided at one end of the screw hole away from the second mounting hole 110 so that the second locking member can be hidden in the tool mounting seat 100 after being threadedly connected to the tool mounting seat 100. In the embodiments of the present application, the second locking member is a bolt. The screw hole communicates with the second mounting hole 110. Under the action of the thread, the bolt can press and fix the chamfering tool 500 in the second mounting hole 110 with a certain pre-pressure.

[0041] In some embodiments, asFigure 8 As shown, one side of the chamfering tool 500 facing the second locking member is the second inclined surface 510. The second locking member abuts against the second inclined surface 510. From one end of the second inclined surface 510 close to the cutting edge surface of the chamfering tool 500 to the other end, the perpendicular distance between the second inclined surface 510 and the central axis of the chamfering tool 500 gradually increases. When the second locking member abuts against the second inclined surface 510, during the process of machining the workpiece with the chamfering tool 500, the chamfering tool 500 can only retract into the second mounting hole 110 under the action of the force, avoiding the situation of overcutting caused by excessive extension of the chamfering tool 500 during work and effectively protecting the workpiece.

[0042] Wherein, the included angle between the first inclined surface 210 and the central axis of the rough boring tool 200 is 2° - 10°. In the embodiment of the present application, the included angle between the first inclined surface 210 and the central axis of the rough boring tool 200 is preferably 2°.

[0043] In some embodiments, the tool mounting seat 100 further includes a third mounting hole 130. The fine boring tool is inserted into the third mounting hole 130 and then locked by a third fastener. The third fastener is a bolt. The tool mounting seat 100 has a hole for threaded connection of the bolt so as to be able to fix the fine boring tool. To prevent the fine boring tool from rotating, a positioning pin is provided on the fine boring tool, and the third mounting hole 130 has a groove cooperating with the positioning pin. The rotation of the fine boring tool is restricted through the cooperation of the positioning pin and the groove.

[0044] Specifically, the rough boring tool 200, the fine boring tool and the chamfering tool 500 can complete the rough and fine boring of the inner hole of the workpiece in one processing, and then chamfer the hole opening. The rough boring tool 200 and the fine boring tool are installed opposite to each other at 180°. After installation, these two tool tips are no longer disassembled. During rough and fine boring, the tip position of the rough boring tool 200 is lower than the tip position of the rough boring tool 200; the tip of the chamfering tool 500 is designed at the lowest position of the three tool tips. When the rough and fine boring of the inner hole is completed in one processing, the chamfering tool 500 is adjusted without disassembling the rough and fine tools. After chamfering, the chamfering tool 500 head is adjusted again, and the next part can be processed repeatedly.

[0045] When machining the hole opening chamfer, the tip position of the chamfering tool 500 is set to be higher than that of the rough boring tool 200 and the fine boring tool. Therefore, the chamfering tool 500 contacts the workpiece first, so there is no need to disassemble the rough and fine tool tips.

[0046] Before rough and fine boring, first adjust the chamfering tool 500 so that the tip position of the fine boring tool is higher than the tips of the chamfering tool 500 and the rough boring tool 200. During machining, the rough boring tool 200 and the fine boring tool complete the rough and fine boring of the inner hole of the cylinder liner in one feed. The rough boring tool 200 and the fine boring tool are installed at 180°. The cutting forces can offset each other to a certain extent, reducing the situation of tool deflection during cutting. The outer diameter of the shank of the rough boring tool 200 has a clearance fit with the mounting hole.

[0047] The fine boring tool can finely bore the inner hole with an accuracy of the order of 0.01 mm. The designed and improved boring and chamfering mechanism can achieve rough boring and fine boring in one processing. For chamfering processing, there is no need to disassemble the rough boring tool and the fine boring tool. The cutting amount and efficiency of the rough boring tool 200 are guaranteed, and the efficiency of boring and chamfering in this process is improved.

[0048] The above has described the embodiments of the present application in detail with reference to the accompanying drawings. However, the present application is not limited to the above embodiments, and various changes can be made without departing from the purpose of the present application within the knowledge scope of those of ordinary skill in the technical field.

Claims

1. A boring and chamfering mechanism, characterized in that: It includes a tool mounting seat, on which a detachable rough boring tool, a finish boring tool and a chamfering tool are provided. The rough boring tool, the finish boring tool and the chamfering tool are located in the same plane. The rough boring tool and the finish boring tool are respectively located on both sides of the tool mounting seat. The extension lines of the central axes of the rough boring tool, the finish boring tool and the chamfering tool intersect at the central axis of the tool mounting seat. The distance from the cutting edge surface of the rough boring tool to the central axis of the tool mounting seat is less than the distance from the cutting edge surface of the finish boring tool to the central axis of the tool mounting seat. The distances of the rough boring tool, the finish boring tool and the chamfering tool from the central axis of the tool mounting seat are adjustable.

2. The boring and chamfering mechanism according to claim 1, characterized in that: The tool mounting seat includes a first mounting hole, and a first locking structure is provided in the first mounting hole. The rough boring tool inserted into the first mounting hole is positioned and fixed by the first locking structure.

3. The boring and chamfering mechanism according to claim 2, wherein: The first locking structure includes a first positioning member, which is inserted into the rough boring tool along a direction perpendicular to the central axis of the rough boring tool. The first mounting hole is provided with a first positioning groove, and the part of the first positioning member exposed outside the rough boring tool is located in the first positioning groove.

4. The boring and chamfering mechanism according to claim 2, characterized in that: The first locking structure further includes a first locking member, which is threadedly connected to the tool mounting seat, and the first locking member can enter the first mounting hole to press against the rough boring tool.

5. The boring and chamfering mechanism according to claim 4, characterized in that: One side of the rough boring tool facing the first locking member is a first inclined surface. The first locking member abuts against the first inclined surface. From one end of the first inclined surface close to the cutting edge surface of the rough boring tool to the other end, the vertical distance from the first inclined surface to the central axis of the rough boring tool gradually increases.

6. The boring and chamfering mechanism according to claim 2, wherein: One end of the rough boring tool close to the central axis of the tool mounting seat is threadedly connected with a first adjusting member, and the first adjusting member is used to adjust the distance from the cutting edge surface of the rough boring tool to the central axis of the tool mounting seat.

7. The boring and chamfering mechanism according to claim 1, characterized in that: The tool mounting seat further includes a second mounting hole, and a second locking structure is provided in the second mounting hole. The chamfering tool inserted into the second mounting hole is positioned and limited by the second locking structure.

8. The boring and chamfering mechanism according to claim 7, characterized in that: The second locking structure includes a second positioning member and a second locking member. The second positioning member is inserted into the chamfering tool along a direction perpendicular to the central axis of the chamfering tool. The second mounting hole is provided with a second positioning groove, and the part of the second positioning member exposed outside the chamfering tool is located in the second positioning groove. The second locking structure further includes a second locking member, which is threadedly connected to the tool mounting seat, and the second locking member can enter the second mounting hole to press against the chamfering tool.

9. The boring and chamfering mechanism according to claim 8, characterized in that: One side of the chamfering tool facing the second locking member is a second inclined surface. The second locking member abuts against the second inclined surface. From one end of the second inclined surface close to the cutting edge surface of the chamfering tool to the other end, the vertical distance from the second inclined surface to the central axis of the chamfering tool gradually increases.

10. The boring and chamfering mechanism according to claim 1, characterized in that: The tool mounting seat further includes a third mounting hole. After the finish boring tool is inserted into the third mounting hole, it is locked by a third fastener.

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