Hole edge chamfering method and hole edge chamfering device

Abstract

The invention relates to a hole edge chamfering machining method and a hole edge chamfering machining device. The method comprises the following steps: fixing the positioning rod on a machine tool spindle; the positioning rod is sleeved with the positioning hole of the workpiece to be machined, and the workpiece to be machined is fixed; the radial size of the positioning rod is matched with the aperture of the positioning hole; the positioning rod is controlled to be away from the to-be-machined workpiece, so that the positioning rod is detached relative to the machine tool spindle under the condition that the positioning rod is moved out of the positioning hole, and the chamfering tool is fixed to the machine tool spindle; and the chamfering tool is controlled to move and rotate relative to the to-be-machined workpiece, and the end face of the positioning hole is chamfered through the chamfering tool. The workpiece to be machined is controlled to move relative to the positioning rod, the positioning rod is sleeved with the positioning hole due to the fact that the radial size of the positioning rod is matched with the hole diameter of the positioning hole, rapid centering of the workpiece to be machined and a machine tool spindle is achieved, and therefore during follow-up chamfering machining, a chamfering cutter and the positioning hole do not need to be repositioned, and machining efficiency is improved. And the efficiency of chamfering the end face of the positioning hole is improved.

Description

Technical Field

[0001] This application relates to the field of machining technology, and in particular to a method and apparatus for chamfering the edges of holes. Background Technology

[0002] Structures with holes are prone to fatigue failure under alternating loads, mainly due to stress concentration caused by geometric discontinuities in the hole area. Chamfering the hole edges can effectively alleviate stress concentration, thereby delaying crack initiation. However, current technologies suffer from low machining efficiency for hole edge chamfering, thus affecting part manufacturing efficiency. Summary of the Invention

[0003] Therefore, it is necessary to provide a method for chamfering the edges of holes to address the problem of low efficiency in existing chamfering processes, which affects the efficiency of part processing.

[0004] A method for chamfering the edge of a hole includes the following steps:

[0005] Fix the positioning bar onto the machine tool spindle;

[0006] The positioning hole of the workpiece to be processed is fitted onto the positioning rod, and the workpiece to be processed is fixed; wherein the radial dimension of the positioning rod is adapted to the diameter of the positioning hole;

[0007] Control the positioning bar to move away from the workpiece to be processed, so that when the positioning bar moves out of the positioning hole, the positioning bar is disassembled relative to the machine tool spindle, and the chamfering tool is fixed on the machine tool spindle;

[0008] The chamfering cutter is controlled to move and rotate relative to the workpiece to be processed, and the end face of the positioning hole is chamfered by the chamfering cutter.

[0009] In one embodiment, the chamfering of the end face of the positioning hole using the chamfering tool specifically includes:

[0010] The chamfering cutter is controlled to approach and rotate towards the upper end face of the positioning hole, and the upper end face of the positioning hole is chamfered by the chamfering cutter;

[0011] While controlling the chamfering cutter to move away from the upper end face of the positioning hole and to translate a first preset distance away from the cutting edge of the chamfering cutter, the chamfering cutter is controlled to pass through the positioning hole;

[0012] Control the chamfering cutter to move in the opposite direction to return to the center position;

[0013] The chamfering cutter is controlled to approach and rotate towards the lower end face of the positioning hole, and the lower end face of the positioning hole is chamfered by the chamfering cutter.

[0014] In one embodiment, before chamfering the lower end face of the positioning hole with the chamfering tool, the method further includes:

[0015] Rotate the chamfering blade so that the angle of the chamfering blade is at a preset angle.

[0016] In one embodiment, after chamfering the end face of the positioning hole with the chamfering tool, the method further includes:

[0017] Control the chamfering tool to move away from the positioning hole;

[0018] The chamfering tool is removed from the machine tool spindle, and the strengthening tool is fixed on the machine tool spindle.

[0019] The strengthening tool is controlled to move relative to the workpiece until it abuts against the chamfered surface of the positioning hole, thereby strengthening the chamfered surface.

[0020] In one embodiment, the strengthening tool includes a strengthening head and a connecting rod connected to each other, the connecting rod being fixed to the machine tool spindle. Strengthening the chamfered surface using the strengthening tool specifically includes:

[0021] The strengthening tool is controlled to move closer to the upper chamfered surface of the positioning hole until it abuts against the upper chamfered surface, and the upper chamfered surface is strengthened by the strengthening head.

[0022] With the reinforcing tool moved away from the upper chamfered surface of the positioning hole, the reinforcing head is disassembled relative to the connecting rod;

[0023] With the connecting rod portion passing through the positioning hole, the reinforcing head is installed in reverse on the portion of the connecting rod outside the positioning hole;

[0024] The strengthening tool is controlled to move closer to the lower chamfer surface of the positioning hole until it abuts against the lower chamfer, and the lower chamfer surface is strengthened by the strengthening head.

[0025] This application also provides a hole edge chamfering processing device, which can solve at least one of the above-mentioned technical problems.

[0026] A chamfering device for holes, comprising:

[0027] A positioning tool, which is used to be mounted on a machine tool spindle, includes a positioning bar, the radial dimension of which is adapted to the diameter of the positioning hole of the workpiece to be processed;

[0028] A chamfering tool is used to be mounted on the machine tool spindle. The chamfering tool includes a chamfering cutter, which is used to chamfer the end face of the positioning hole of the workpiece to be processed.

[0029] In one embodiment, the chamfering tool further includes a first tool holder connected to the chamfering cutter, the first tool holder being used to connect to the machine tool spindle.

[0030] The hole edge chamfering processing device further includes a limiting component, which includes a rotating column. The first tool holder is used to connect to the machine tool spindle. The rotating column passes through the chamfering cutter and is connected to the first tool holder. The chamfering cutter can rotate relative to the first tool holder around the axis of the rotating column to adjust the angle of the chamfering cutter's cutting edge.

[0031] In one embodiment, the first tool holder is provided with a first limiting edge and a second limiting edge, the extension directions of the first limiting edge and the second limiting edge are set at an angle, the first limiting edge and the second limiting edge are used to abut against the two side walls of the chamfering tool, and at least one of the first limiting edge and the second limiting edge has a rotational clearance with the side wall corresponding to the chamfering tool.

[0032] In one embodiment, the limiting component further includes a clamping member that abuts against the side of the chamfering cutter away from the first tool holder and is detachably connected to the first tool holder. The clamping member is configured to press the chamfering cutter onto the first tool holder when connected to it.

[0033] In one embodiment, the hole chamfering processing device further includes a strengthening tool, which includes a strengthening head and a connecting rod. The connecting rod is used to be mounted on the machine tool spindle, and the strengthening head is detachably connected to the connecting rod. The strengthening head is used to abut against the chamfered surface of the positioning hole to strengthen the chamfered surface.

[0034] Beneficial effects:

[0035] The hole chamfering method provided in this application includes the following steps: fixing a positioning bar on a machine tool spindle; fitting the positioning hole of the workpiece to be processed onto the positioning bar and fixing the workpiece; wherein the radial dimension of the positioning bar is adapted to the diameter of the positioning hole; controlling the positioning bar to move away from the workpiece to be processed, so that when the positioning bar moves out of the positioning hole, the positioning bar is disassembled relative to the machine tool spindle, and the chamfering cutter is fixed on the machine tool spindle; controlling the chamfering cutter to move and rotate relative to the workpiece to be processed, and chamfering the end face of the positioning hole by the chamfering cutter. In this application, the positioning bar is fixed on the machine tool spindle, and the workpiece to be processed is in a free state in the initial state, which makes it easy to control the movement of the workpiece to be processed relative to the positioning bar. Since the radial dimension of the positioning bar is adapted to the diameter of the positioning hole, the workpiece to be processed and the machine tool spindle can be quickly aligned by fitting the positioning hole of the workpiece to be processed onto the positioning bar. Therefore, when the chamfering tool is installed to chamfer the end face of the positioning hole in the subsequent process, it is not necessary to reposition the chamfering tool and the positioning hole, which improves the efficiency of chamfering the end face of the positioning hole.

[0036] This application also provides a hole edge chamfering processing device, including a positioning tool and a chamfering tool; the positioning tool is used to be mounted on a machine tool spindle, and the positioning tool includes a positioning bar, the radial dimension of which is adapted to the diameter of the positioning hole of the workpiece to be processed; the chamfering tool is used to be mounted on the machine tool spindle, and the chamfering tool includes a chamfering cutter, which is used to chamfer the end face of the positioning hole of the workpiece to be processed. This hole edge chamfering processing device can achieve at least one of the above-mentioned technical effects. Attached Figure Description

[0037] Figure 1 A flowchart illustrating a method for chamfering the edge of a hole according to an embodiment of this application.

[0038] Figure 2 This is a schematic diagram of the positioning tool in a hole edge chamfering processing device provided in an embodiment of this application.

[0039] Figure 3 This is a schematic diagram showing the positioning tool and the workpiece to be processed in a hole edge chamfering processing device provided in an embodiment of this application.

[0040] Figure 4 This is a schematic diagram of the chamfering tool in a hole chamfering processing device provided in an embodiment of this application.

[0041] Figure 5 This is a schematic diagram of the first tool holder in a hole edge chamfering processing device provided in an embodiment of this application.

[0042] Figure 6 This is a first schematic diagram showing the engagement of a chamfering tool and a workpiece in a hole chamfering processing apparatus provided in an embodiment of this application.

[0043] Figure 7This is a second schematic diagram showing the engagement of the chamfering tool and the workpiece in a chamfering device for hole edges provided in an embodiment of this application.

[0044] Figure 8 This is a first schematic diagram showing the cooperation between the strengthening tool and the workpiece in a hole edge chamfering processing apparatus provided in an embodiment of this application.

[0045] Figure 9 This is a second schematic diagram showing the cooperation between the strengthening tool and the workpiece in a hole edge chamfering processing apparatus provided in an embodiment of this application.

[0046] Icon labels:

[0047] 100-Positioning tool; 110-Positioning rod; 120-Second tool holder; 200-Chamfering tool; 210-Chamfering cutter; 211-First cutting edge; 212-Second cutting edge; 230-First tool holder; 231-First limiting edge; 232-Second limiting edge; 233-Mounting hole; 234-Limiting groove; 235-Opening; 236-Tool groove; 237-Matching hole; 238-First section; 239-Second section; 300-Limiting assembly; 310-Shim; 320-Clamping component; 321-Clamping plate; 322-Fastening rod; 400-Reinforcing tool; 410-Connecting rod; 420-Reinforcing head; 500-Workpiece to be processed; 510-Positioning hole; 520-Upper chamfered surface; 530-Lower chamfered surface. Detailed Implementation

[0048] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0049] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0050] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0051] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0052] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0053] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0054] See Figure 2 , Figure 3 and Figure 4 , Figure 2 This is a schematic diagram of the positioning tool in a hole edge chamfering processing device provided in an embodiment of this application. Figure 3 This is a schematic diagram showing the positioning tool and the workpiece to be processed in a hole edge chamfering processing device provided in an embodiment of this application. Figure 4This is a schematic diagram of a chamfering tool in a hole edge chamfering processing apparatus provided in an embodiment of this application. The hole edge chamfering processing apparatus provided in an embodiment of this application includes a positioning tool 100 and a chamfering tool 200; the positioning tool 100 is used to be mounted on a machine tool spindle, and includes a positioning bar 110, the radial dimension of which is adapted to the diameter of the positioning hole 510 of the workpiece 500 to be processed; the chamfering tool 200 is used to be mounted on a machine tool spindle, and includes a chamfering cutter 210, which is used to chamfer the end face of the positioning hole 510 of the workpiece 500 to be processed.

[0055] Specifically, in this application, the radial dimension of the positioning rod 110 is adapted to the diameter of the positioning hole 510. Thus, by fitting the positioning hole 510 of the workpiece 500 to be processed onto the positioning rod 110, the workpiece 500 to be processed can be quickly aligned with the machine tool spindle. Furthermore, by fixing the aligned workpiece 500, when the chamfering tool 210 is subsequently installed to chamfer the end face of the positioning hole 510, it is not necessary to reposition the chamfering tool 210 and the positioning hole 510, thereby improving the efficiency of chamfering the end face of the positioning hole 510.

[0056] Furthermore, the axial dimension of the positioning rod 110 is larger than the axial dimension of the positioning hole 510, allowing the positioning rod 110 to pass through the positioning hole 510 for accurate positioning. The difference between the radial dimension of the positioning rod 110 and the diameter of the positioning hole 510 is 0.02-0.06 mm. For example, the diameter of the positioning hole 510 is 10-50 mm, and the axial dimension of the positioning hole 510 is 4-40 mm. The workpiece to be machined can be a flat-head hole, a flange hole, or a fork-ear hole. The positioning rod 110 is fixed to the machine tool spindle via the second tool holder 120.

[0057] See Figure 4 and Figure 5 , Figure 5 This is a schematic diagram of the first tool holder in a hole edge chamfering processing device provided in one embodiment of this application. In some embodiments, the chamfering tool 200 further includes a first tool holder 230 connected to the chamfering cutter 210. The first tool holder 230 is used to connect to the machine tool spindle. The hole edge chamfering processing device also includes a limiting component 300, which includes a rotating column. The rotating column passes through the chamfering cutter 210 and is connected to the first tool holder 230. The chamfering cutter 210 can rotate relative to the first tool holder 230 about the axis of the rotating column to adjust the angle of the cutting edge of the chamfering cutter 210, thereby enabling the chamfering cutter 210 to adapt to various chamfering angle requirements and improve the accuracy and adaptability of chamfering processing. The rotating column is perpendicular to the extending direction of the first tool holder 230.

[0058] Furthermore, the first tool holder 230 is provided with a mating hole 237, and the rotating pin is threadedly connected to the wall of the mating hole 237. Preferably, the rotating pin is a pin.

[0059] See Figure 6 and Figure 7 , Figure 6 This is a first schematic diagram showing the engagement of a chamfering tool and a workpiece in a hole chamfering processing apparatus provided in an embodiment of this application. Figure 7 This is a second schematic diagram illustrating the engagement of a chamfering tool with a workpiece in a hole edge chamfering apparatus according to an embodiment of this application. In some embodiments, the first tool holder 230 includes a first segment 238 and a second segment 239 connected to each other. The first segment 238 is connected to the machine tool spindle, and a mating hole 237 is disposed on the second segment 239. The radial dimension of the second segment 239 is smaller than the diameter of the positioning hole 510, and the distance between the end of the second segment 239 near the first segment 238 and the center of the mating hole 237 is greater than the axial dimension of the positioning hole 510. This allows the second segment 239 to extend into the positioning hole 510, enabling the chamfering tool 210 to pass through the positioning hole 510. Consequently, the chamfering tool 210 can chamfer the lower end face of the positioning hole 510, thus avoiding the disassembly of the chamfering tool 210 and improving the processing efficiency of the hole edge chamfering apparatus.

[0060] It should be noted that the maximum diameter of the chamfering cutter 210 after installation in the second section 239 is smaller than the diameter of the positioning hole 510, thus ensuring that the first tool holder 230 can drive the chamfering cutter 210 to extend beyond the positioning hole 510. Preferably, the difference between the maximum diameter of the chamfering cutter 210 after installation in the second section 239 and the diameter of the positioning hole 510 is less than 0.5mm. Furthermore, the difference between the rotation diameter of the chamfering cutter 210 and the diameter of the positioning hole 510 after chamfering is greater than 1mm, ensuring smooth chamfering at the edge of the hole.

[0061] See Figure 6 and Figure 7 In some embodiments, the chamfering cutter 210 includes a first cutting edge 211 and a second cutting edge 212 arranged at an angle. The first cutting edge 211 is located below the second cutting edge 212. The first cutting edge 211 is used to chamfer the upper end face of the positioning hole 510, and the second cutting edge 212 is used to chamfer the lower end face of the positioning hole 510. By setting the first cutting edge 211 and the second cutting edge 212, the angle adjustment of the chamfering cutter 210 when chamfering the lower end face of the positioning hole 510 can be reduced. That is, only a slight adjustment of the chamfering cutter 210 is needed to make the chamfered angles of the upper and lower end faces of the positioning hole 510 the same. In other words, the chamfering cutter 210 will not interfere with the workpiece 500 during the angle adjustment process, and the distance of the chamfering cutter 210 passing through the positioning hole 510 can be reduced, thereby improving processing efficiency.

[0062] See Figure 4 and Figure 5 In some embodiments, the first tool holder 230 is provided with a first limiting edge 231 and a second limiting edge 232. The extending directions of the first limiting edge 231 and the second limiting edge 232 are set at an included angle. The first limiting edge 231 and the second limiting edge 232 are used to abut against the two side walls of the chamfering tool 210. At least one of the first limiting edge 231 and the second limiting edge 232 has a rotation gap with the corresponding side wall of the chamfering tool 210, thereby allowing the chamfering tool 210 to rotate within a certain range relative to the first tool holder 230. This also protects the chamfering tool 210 from being accidentally touched, causing excessive rotation angle and damaging the workpiece 500 to be processed. Preferably, the rotation angle adjustment range of the chamfering tool 210 is -5° to +5°.

[0063] Furthermore, the first handle 230 is provided with a groove 236, which is far from the two adjacent side walls of the cutting edge of the chamfering tool 210, and is constructed as a first limiting edge 231 and a second limiting edge 232.

[0064] See Figure 4 and Figure 5 In some embodiments, the limiting component 300 further includes a clamping member 320, which abuts against the side of the chamfering cutter 210 away from the first tool holder 230 and is detachably connected to the first tool holder 230. When the clamping member 320 is connected to the first tool holder 230, it presses the chamfering cutter 210 onto the first tool holder 230.

[0065] Specifically, when the clamping member 320 is disassembled from the first tool holder 230, the chamfering cutter 210 can rotate relative to the first tool holder 230 around the axis of the rotating column to adjust the angle. When the cutting edge of the chamfering cutter 210 is adjusted to a preset angle, the clamping member 320 can be connected to the first tool holder 230, thereby pressing the chamfering cutter 210 onto the first tool holder 230 to stably define the position of the chamfering cutter 210 relative to the first tool holder 230, so that the chamfering cutter 210 can chamfer the end face of the positioning hole 510 to improve the machining accuracy.

[0066] Furthermore, the clamping member 320 includes a clamping plate 321 and a fastening rod 322. The fastening rod 322 passes through the clamping plate 321 and is connected to the first tool holder 230. The clamping plate 321 abuts against the chamfering tool 210, thereby stably clamping the chamfering tool 210 onto the first tool holder 230.

[0067] Furthermore, the first tool holder 230 is provided with an interconnected mounting hole 233 and a limiting groove 234. The diameter of the limiting groove 234 is larger than the diameter of the mounting hole 233. The fastening rod 322 is threadedly connected to the wall of the mounting hole 233. The clamping plate 321 is partially accommodated in the limiting groove 234, and its relative rotation with the wall of the limiting groove 234 is restricted, thereby allowing the clamping plate 321 to stably press the chamfering cutter 210 onto the first tool holder 230. The limiting groove 234 is provided with an opening 235, which communicates with the cutter groove 236. The clamping plate 321 partially extends into the cutter groove 236 through the opening 235, abutting against the chamfering cutter 210, thereby stably restricting the rotation of the clamping plate 321. Preferably, the fastening rod 322 is a screw.

[0068] See Figure 4 and Figure 5 The hole edge chamfering processing device also includes a shim 310, which is disposed between the clamping plate 321 and the chamfering cutter 210, thereby increasing the contact area between the clamping plate 321 and the chamfering cutter 210, so that the clamping plate 321 will be stably pressed onto the first tool holder 230.

[0069] See Figure 8 and Figure 9 , Figure 8 This is a first schematic diagram showing the cooperation between the strengthening tool and the workpiece in a hole edge chamfering processing apparatus provided in an embodiment of this application. Figure 9 This is a second schematic diagram showing the cooperation between a strengthening tool and a workpiece in a hole edge chamfering apparatus provided in one embodiment of this application. In some embodiments, the hole edge chamfering apparatus further includes a strengthening tool 400, which includes a connecting rod 410 and a strengthening head 420. The connecting rod 410 is mounted on a machine tool spindle, and the strengthening head 420 is detachably connected to the connecting rod 410. The strengthening head 420 is used to abut against the chamfered surface of the positioning hole 510 to strengthen the chamfered surface, thereby improving the surface roughness of the chamfered surface and enhancing its fatigue performance.

[0070] In this application, the reinforcing head 420 is detachably connected to the connecting rod 410. Therefore, after reinforcing the upper chamfered surface 520 of the positioning hole 510, it is only necessary to detach the reinforcing head 420 relative to the connecting rod 410, and then, with the connecting rod 410 passing through the positioning hole 510, reverse the installation of the reinforcing head 420 onto the connecting rod 410. This achieves reinforcement of the lower chamfered surface 530 of the positioning hole 510, without needing to disassemble the workpiece 500, thereby improving processing efficiency. It should be noted that the radial dimension of the connecting rod 410 is smaller than the radial dimension of the positioning hole 510, and the axial dimension of the connecting rod 410 is larger than the axial dimension of the positioning hole 510.

[0071] Furthermore, the difference between the radial dimension of the connecting rod 410 and the diameter of the positioning hole 510 is less than 0.5 mm, and the axial dimension of the connecting rod 410 is greater than the axial dimension of the positioning hole 510, ensuring that the connecting rod 410 can be inserted deep into the positioning hole 510. The difference between the maximum diameter of the reinforcing head 420 and the hole diameter is greater than 2 mm, and the difference between the minimum diameter of the reinforcing head 420 and the hole diameter is less than 2 mm, ensuring that the chamfer of the hole edge can be reinforced.

[0072] See Figures 1-4 , Figure 1 This is a flowchart illustrating a hole edge chamfering method according to an embodiment of this application. This application also provides a hole edge chamfering method, used with the aforementioned hole edge chamfering tool, comprising the following steps:

[0073] S100 fixes the positioning bar 110 on the machine tool spindle;

[0074] S200 places the positioning hole 510 of the workpiece 500 to be processed onto the positioning rod 110 and fixes the workpiece 500 to be processed; wherein the radial dimension of the positioning rod 110 is adapted to the hole diameter of the positioning hole 510.

[0075] S300 controls the positioning bar 110 to move away from the workpiece 500, so that when the positioning bar 110 moves out of the positioning hole 510, the positioning bar 110 is disassembled relative to the machine tool spindle, and the chamfering tool 210 is fixed on the machine tool spindle.

[0076] S400 controls the chamfering cutter 210 to move and rotate relative to the workpiece 500, and the chamfering cutter 210 is used to chamfer the end face of the positioning hole 510.

[0077] Specifically, in this application, the positioning bar 110 is fixed on the machine tool spindle, and the workpiece 500 to be processed is in a free state in the initial state, which facilitates the control of the movement of the workpiece 500 relative to the positioning bar 110. Since the radial dimension of the positioning bar 110 is adapted to the diameter of the positioning hole 510, the workpiece 500 to be processed is quickly aligned with the machine tool spindle by fitting the positioning hole 510 of the workpiece 500 onto the positioning bar 110. Therefore, when the chamfering tool 210 is subsequently installed to chamfer the end face of the positioning hole 510, it is not necessary to reposition the chamfering tool 210 and the positioning hole 510, which improves the efficiency of chamfering the end face of the positioning hole 510.

[0078] See Figure 1 , Figure 4 , Figure 6 and Figure 7 In some embodiments, the end face of the positioning hole 510 is chamfered using a chamfering cutter 210, specifically including:

[0079] S410 controls the chamfering cutter 210 to approach and rotate toward the upper end face of the positioning hole 510, and the chamfering cutter 210 is used to chamfer the upper end face of the positioning hole 510.

[0080] Specifically, the machine tool spindle first moves the chamfering cutter 210 downward to a first preset position, and then moves and rotates the chamfering cutter 210 downward to achieve chamfering of the upper end face of the chamfering cutter 210. Since the positioning bar 110 has already aligned the machine tool spindle with the positioning hole 510 of the workpiece 500, there is no need to reposition the chamfering cutter 210 with the positioning hole 510, thus improving the efficiency of chamfering the end face of the positioning hole 510.

[0081] When the chamfering cutter 210 is controlled to move away from the upper end face of the positioning hole 510 and translate a first preset distance away from the cutting edge of the chamfering cutter 210, the chamfering cutter 210 is controlled to pass through the positioning hole 510.

[0082] Specifically, after the upper end face of the positioning hole 510 is chamfered, the chamfering cutter 210 is moved upward by the machine tool spindle to move away from the upper end face of the positioning hole 510. This avoids the chamfering cutter 210 from scraping the upper chamfered surface 520 of the positioning hole 510 when it moves a first preset distance away from the cutting edge of the chamfering cutter 210. By controlling the chamfering cutter 210 to move a first preset distance away from the cutting edge of the chamfering cutter 210, the chamfering cutter 210 can pass through the positioning hole 510 eccentrically.

[0083] S430 controls the chamfering tool 210 to move in the reverse direction to return to the center position.

[0084] Specifically, after the chamfering cutter 210 passes through the positioning hole 510, the lower end face of the positioning hole 510 needs to be chamfered. By controlling the chamfering cutter 210 to move in the opposite direction to return to the center position, it is not necessary to reposition the chamfering cutter 210 and the positioning hole 510, thus improving the efficiency of chamfering the end face of the positioning hole 510.

[0085] S440 controls the chamfering cutter 210 to approach and rotate toward the lower end face of the positioning hole 510, and the chamfering cutter 210 is used to chamfer the lower end face of the positioning hole 510.

[0086] Specifically, the machine tool spindle first drives the chamfering cutter 210 to move upward to the second preset position, and then drives the chamfering cutter 210 to move upward and rotate, so as to achieve chamfering of the lower end face of the chamfering cutter 210.

[0087] Furthermore, when the upper and lower end faces of the positioning hole 510 are chamfered using the chamfering cutter 210, cutting fluid is used to lubricate and cool the chamfering cutter 210 and the cutting surface.

[0088] See Figure 1 , Figure 4 and Figure 5 Before chamfering the lower end face of the positioning hole 510 with the chamfering cutter 210, the method further includes:

[0089] Rotate the chamfering cutter 210 so that the angle of the cutting edge of the chamfering cutter 210 is at a preset angle.

[0090] Specifically, the chamfering cutter 210 has an adjustable angle, allowing it to adapt to various chamfering angle requirements and improving the accuracy and adaptability of the chamfering process. Furthermore, when the chamfering cutter 210 passes through the positioning hole 510 to chamfer the lower end face of the positioning hole 510, it can be rotated to chamfer the lower end face of the positioning hole 510 without needing to disassemble it, thus improving processing efficiency.

[0091] Furthermore, the rotary chamfering tool 210 specifically includes:

[0092] With the clamping member 320 disassembled relative to the first tool holder 230, the chamfering tool 210 is rotated about the axis of the rotating column until the angle of the cutting edge of the chamfering tool 210 is a preset angle;

[0093] The clamping member 320 is connected relative to the first tool holder 230 so that the clamping member 320 presses the chamfering tool 210 onto the first tool holder 230.

[0094] The clamping member 320 includes a clamping plate 321 and a fastening rod 322. The fastening rod 322 passes through the clamping plate 321 and is connected to the first tool holder 230. The clamping plate 321 abuts against the chamfering tool 210, thereby stably clamping the chamfering tool 210 onto the first tool holder 230.

[0095] Furthermore, the chamfering cutter 210 includes a first cutting edge 211 and a second cutting edge 212 arranged at an angle. The first cutting edge 211 is located below the second cutting edge 212. The first cutting edge 211 is used to chamfer the upper end face of the positioning hole 510, and the second cutting edge 212 is used to chamfer the lower end face of the positioning hole 510. The chamfering cutter 210 is rotated about the axis of the rotating column until the angle of the cutting edge of the chamfering cutter 210 is a preset angle. Specifically, this includes rotating the chamfering cutter 210 about the axis of the rotating column until the angle of the second cutting edge 212 is a preset angle.

[0096] See Figure 1 , Figure 7 , Figure 8 and Figure 9 In some embodiments, after chamfering the end face of the positioning hole 510 with a chamfering cutter 210, the method further includes:

[0097] The S500 controls the chamfering tool 210 to be positioned away from the locating hole 510.

[0098] Specifically, when the machine tool spindle drives the chamfering cutter 210 away from the lower end face of the positioning hole 510 and moves it a second preset distance away from the cutting edge of the chamfering cutter 210, the chamfering cutter 210 is controlled to extend out of the positioning hole 510, thereby avoiding the chamfering cutter 210 from scratching the workpiece 500.

[0099] S600 removes the chamfering tool 210 from the machine tool spindle and fixes the strengthening tool 400 to the machine tool spindle.

[0100] Specifically, when the chamfering cutter 210 extends beyond the positioning hole 510, the chamfering cutter 210 is controlled to move in the opposite direction to return to the center position. Thus, after the chamfering cutter 210 is disassembled relative to the machine tool spindle and the strengthening tool 400 is fixed on the machine tool spindle, there is no need to reposition the positioning hole 510 and the machine tool spindle, which improves processing efficiency.

[0101] The S700 controls the strengthening tool 400 to move relative to the workpiece 500 until it comes into contact with the chamfered surface of the positioning hole 510. The strengthening tool 400 strengthens the chamfered surface, thereby improving the surface roughness and fatigue performance of the chamfered surface.

[0102] See Figure 1 , Figure 7 , Figure 8 and Figure 9 In some embodiments, the strengthening tool 400 includes a strengthening head 420 and a connecting rod 410 connected to each other. The connecting rod 410 is fixed to the machine tool spindle. The strengthening tool 400 strengthens the chamfered surface, specifically including:

[0103] The S710 control strengthening tool 400 approaches the upper chamfered surface 520 of the relative positioning hole 510 until it abuts against the upper chamfered surface 520, and then strengthens the upper chamfered surface 520 through the strengthening head 420.

[0104] Specifically, the machine tool spindle drives the strengthening head 420 to apply a certain static pressure to the upper chamfer surface 520 of the positioning hole 510. Then, the machine tool spindle drives the strengthening head 420 to vibrate ultrasonically and rotate the strengthening head 420 so that the strengthening head 420 strengthens the upper chamfer surface 520.

[0105] When the S720 control strengthening tool 400 is far away from the upper chamfered surface 520 of the relative positioning hole 510, the strengthening head 420 is disassembled relative to the connecting rod 410, so that the workpiece 500 to be processed does not need to be disassembled, so that repositioning is not required, thus improving processing efficiency.

[0106] When the S730 control connecting rod 410 passes through the positioning hole 510, the reinforcing head 420 is installed in reverse on the part of the connecting rod 410 located outside the positioning hole 510, thereby reducing interference to the workpiece 500 to be processed.

[0107] The S740 control strengthener tool 400 approaches the lower chamfer surface 530 of the relative positioning hole 510 until it abuts against the lower chamfer, and strengthens the lower chamfer surface 530 by strengthening head 420.

[0108] Specifically, the machine tool spindle drives the strengthening head 420 to apply a certain static pressure to the lower chamfer surface 530 of the positioning hole 510. Then, the machine tool spindle drives the strengthening head 420 to vibrate ultrasonically and rotate the strengthening head 420 so that the strengthening head 420 strengthens the lower chamfer surface 530.

[0109] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0110] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A method for chamfering the edge of a hole, characterized in that, Includes the following steps: Fix the positioning bar onto the machine tool spindle; The positioning hole of the workpiece to be processed is fitted onto the positioning rod, and the workpiece to be processed is fixed. The radial dimension of the positioning rod is adapted to the diameter of the positioning hole; Control the positioning bar to move away from the workpiece to be processed, so that when the positioning bar moves out of the positioning hole, the positioning bar is disassembled relative to the machine tool spindle, and the chamfering tool is fixed on the machine tool spindle; The chamfering cutter is controlled to move and rotate relative to the workpiece to be processed, and the end face of the positioning hole is chamfered by the chamfering cutter.

2. The method for chamfering the edge of a hole according to claim 1, characterized in that, The chamfering process of the end face of the positioning hole using the chamfering cutter specifically includes: The chamfering cutter is controlled to approach and rotate towards the upper end face of the positioning hole, and the upper end face of the positioning hole is chamfered by the chamfering cutter; While controlling the chamfering cutter to move away from the upper end face of the positioning hole and to translate a first preset distance away from the cutting edge of the chamfering cutter, the chamfering cutter is controlled to pass through the positioning hole; Control the chamfering cutter to move in the opposite direction to return to the center position; The chamfering cutter is controlled to approach and rotate towards the lower end face of the positioning hole, and the lower end face of the positioning hole is chamfered by the chamfering cutter.

3. The hole edge chamfering method according to claim 2, characterized in that, Before chamfering the lower end face of the positioning hole with the chamfering cutter, the method further includes: Rotate the chamfering blade so that the angle of the chamfering blade is at a preset angle.

4. The method for chamfering the edge of a hole according to any one of claims 1-3, characterized in that, After chamfering the end face of the positioning hole with the chamfering tool, the method further includes: Control the chamfering tool to move away from the positioning hole; The chamfering tool is removed from the machine tool spindle, and the strengthening tool is fixed on the machine tool spindle. The strengthening tool is controlled to move relative to the workpiece until it abuts against the chamfered surface of the positioning hole, thereby strengthening the chamfered surface.

5. The hole edge chamfering method according to claim 4, characterized in that, The strengthening tool includes a strengthening head and a connecting rod connected to each other. The connecting rod is fixed to the machine tool spindle. Strengthening the chamfered surface using the strengthening tool specifically includes: The strengthening tool is controlled to move closer to the upper chamfered surface of the positioning hole until it abuts against the upper chamfered surface, and the upper chamfered surface is strengthened by the strengthening head. With the reinforcing tool moved away from the upper chamfered surface of the positioning hole, the reinforcing head is disassembled relative to the connecting rod; With the connecting rod portion passing through the positioning hole, the reinforcing head is installed in reverse on the portion of the connecting rod outside the positioning hole; The strengthening tool is controlled to move closer to the lower chamfer surface of the positioning hole until it abuts against the lower chamfer, and the lower chamfer surface is strengthened by the strengthening head.

6. A chamfering device for holes, characterized in that, include: A positioning tool, which is used to be mounted on a machine tool spindle, includes a positioning bar, the radial dimension of which is adapted to the diameter of the positioning hole of the workpiece to be processed; A chamfering tool is used to be mounted on the machine tool spindle. The chamfering tool includes a chamfering cutter, which is used to chamfer the end face of the positioning hole of the workpiece to be processed.

7. The hole edge chamfering processing device according to claim 6, characterized in that, The chamfering tool further includes a first tool holder connected to the chamfering cutter. The first tool holder is used to connect to the machine tool spindle. The hole edge chamfering processing device further includes a limiting component. The limiting component includes a rotating column. The first tool holder is used to connect to the machine tool spindle. The rotating column passes through the chamfering cutter and is connected to the first tool holder. The chamfering cutter can rotate relative to the first tool holder around the axis of the rotating column to adjust the angle of the chamfering cutter's cutting edge.

8. The hole edge chamfering processing device according to claim 7, characterized in that, The first tool holder is provided with a first limiting edge and a second limiting edge. The extension directions of the first limiting edge and the second limiting edge are set at an angle. The first limiting edge and the second limiting edge are used to abut against the two side walls of the chamfering tool. At least one of the first limiting edge and the second limiting edge has a rotational clearance with the side wall corresponding to the chamfering tool.

9. The hole edge chamfering processing device according to claim 7, characterized in that, The limiting component further includes a clamping member, which abuts against the side of the chamfering cutter away from the first tool holder and is detachably connected to the first tool holder. The clamping member is configured to press the chamfering cutter onto the first tool holder when connected to it.

10. The hole edge chamfering processing device according to any one of claims 6-9, characterized in that, The hole edge chamfering processing device further includes a strengthening tool, which includes a strengthening head and a connecting rod. The connecting rod is used to be installed on the machine tool spindle, and the strengthening head is detachably connected to the connecting rod. The strengthening head is used to abut against the chamfered surface of the positioning hole to strengthen the chamfered surface.

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