Sharp sealing edge cutter for machining center and sharp sealing edge machining method

Abstract

The invention relates to the technical field of aviation numerical control machining, in particular to a sharp edge sealing cutter for a machining center and a sharp edge sealing machining method.The cutter comprises a cutter body, a forming bowl, a pressing ring and a mounting handle, the cutter body, the forming bowl and the pressing ring are connected with one end of the mounting handle in a sleeving mode, and the forming bowl and the pressing ring are arranged on the two sides of the cutter body; the machining stability of the sealing sharp edge machining center can be improved, and the operation difficulty of the machining center is reduced.

Description

Technical Field

[0001] The present invention relates to the field of aviation CNC machining technology, and in particular to a sealing sharp edge tool for a machining center and a sealing sharp edge machining method, which are used for machining the sealing sharp edges of shell parts in a machining center. The shell parts are mainly characterized by right-angle sealing sharp edges on the non-rotating center of complex shell parts, which cannot be machined by lathe. Background Art

[0002] As product integration becomes higher and higher, the right-angle cone valve with a simple structure is widely used. The processing quality of the sharp edge of the right-angle cone valve shell with a sharp seal edge seriously affects the working performance quality of the product, and due to the product function, the dimensional accuracy of the sharp seal edge is required to be high, but due to the processing principle of the machining center, the processing quality of the sharp seal edge is poor, the sharp seal edge processing is seriously chipped during the processing, and there are burrs or flash.

[0003] According to the traditional processing method, manual marking and special fixtures are used to coincide the rotation center of the sharp edge of the part with the rotation center of the lathe, and then turning is performed. It is difficult to ensure the interrelated dimensions. The method of processing the sharp edge of the seal in the machining center is blank. Due to the different processing principles, it is extremely difficult to process it as a machining center, especially when it comes to the sharp edge of the seal of special materials, it is more difficult to maintain the integrity of the sharp edge. Repeated corrections often occur after processing, the quality consistency of the sharp edge of the product seal is poor, the product qualification rate is low, and the efficiency is low in the case of multiple repairs, which cannot meet the normal production and assembly requirements. Summary of the invention

[0004] The purpose of the present invention is to provide a tool for sealing sharp edges for a machining center and a method for processing sealed sharp edges, which can improve the processing stability of the sealing sharp edge machining center and reduce the difficulty of operating the machining center.

[0005] Technical solution:

[0006] A tool for sealing sharp edges for a machining center comprises 1 a tool body, 2 a forming bowl, 3 a clamping ring, and 5 a mounting handle. The tool body 1, the forming bowl 2, and the clamping ring 3 are sleeved on one end of the mounting handle 5. The forming bowl 2 and the clamping ring 3 are arranged on both sides of the tool body 1 to clamp the tool body 1.

[0007] Furthermore, the tool body 1 , the forming bowl 2 and the clamping ring 3 are sleeved on one end of the mounting handle 5 through the mounting screw 4 .

[0008] Furthermore, the tool body 1 is made of a flexible material. If a hard material is used, the sharp edge structure will be destroyed when processing the sealing sharp edge.

[0009] Furthermore, the tool body 1 is a conical structure with a hole, and the inner wall surface of the forming bowl 2 is a conical surface, which cooperates with the outer conical surface of the tool body 1 to press the tool body 1.

[0010] Furthermore, the outer cone angle of the tool body 1 is 30°-60°.

[0011] The method for processing a sealing sharp edge using the tool comprises the following steps:

[0012] Step 1: Rough machining of the sealing sharp edge end face:

[0013] Use tool T1 = D8C0.5H50 end mill to rough-process the original end face to form a sealed sharp edge end face, tool teeth number Z = 4, overhang length L = 50mm, machining accuracy 0.05mm, spindle speed S = 1500RPM, feed F = 150mm / min, cutting depth Ap = 0.5mm, and leave a machining allowance of 0.1mm from the center difference;

[0014] Step 2: Remove rough machining burrs:

[0015] Use tool T2 = D8H70 ceramic brush to polish the burrs on the original end face and the edge between the original end face and the rear end face, with an overhang length of L = 70 mm, a machining accuracy of 0.05 mm, a spindle speed of S = 5000 RPM, and a duration of h = 5 s;

[0016] Step 3: Semi-finishing the middle hole:

[0017] Use tool T3 = D10H60 single-edge boring tool. Adjust the size of the single-edge boring tool before use. The adjustment amount is 30% of the positive tolerance of the inner hole size. Finish the middle hole. The number of tool teeth Z = 1, the overhang length L = 60mm, the processing accuracy is 0.01mm, the spindle speed S = 500RPM, the feed F = 20mm / min, the cutting depth Ap = 0.2mm, and the processing allowance is 0mm.

[0018] Step 4: Semi-finishing the sealing sharp edge end face:

[0019] Use tool T1 = D8C0.5H50 end mill to semi-finish the rear end face formed in step 1, with tool teeth Z = 4, overhang L = 50mm, machining accuracy 0.05mm, spindle speed S = 4000RPM, feed F = 200mm / min, cutting depth Ap = 0.1mm, and machining allowance 0.02mm from the center difference;

[0020] Step 5: Finish the rear end surface of the sealing sharp edge:

[0021] Use tool T3 = D10H60 single-edge boring tool to finish the sealing sharp edge end surface processed in step 4, tool tooth number Z = 1, overhang length L = 60mm, processing accuracy 0.01mm, spindle speed S = 1500RPM, feed F = 20mm / min, cutting depth Ap = 0.02mm;

[0022] Step 6: Finishing the middle hole:

[0023] Use tool T3 = D10H60 single-edge boring tool to finish the middle hole, tool tooth number Z = 1, overhang length L = 60mm, machining accuracy 0.01mm, spindle speed S = 500RPM, feed F = 20mm / min, cutting depth Ap = 0mm;

[0024] Step 7: Use a machining center to polish the sharp edges of the seal with a tool that can cut the sharp edges:

[0025] The diameter of the tool body 1 is larger than the diameter of the middle hole, and the outer end surface of the tool body 1 contacts the sharp edge of the seal and is polished to remove the floating burrs on the sharp edge of the seal;

[0026] Overhang length L = 50mm, spindle speed S = 500RPM, feed F = 30mm / min, compression amount 2mm, dwell for 2min, stop tool rotation, and quickly withdraw the tool from the part.

[0027] Furthermore, before proceeding to step one, it is necessary to check the relevant parameters of the machine tool used with the tool, including: measuring the radial runout of the machine tool spindle <0.015mm, the verticality of the spindle rotation to the work table <0.015mm, the parallelism of the X-axis to the work table <0.015mm, and the parallelism of the Y-axis to the work table <0.015mm.

[0028] Furthermore, before proceeding to step one, appropriate tool material and coating are selected according to the material of the part, and the rotation accuracy of the finishing tool and the integrity of the tool tooth surface are tested.

[0029] Beneficial effects:

[0030] A tool for sealing sharp edges for a machining center and a method for machining the sealing sharp edges are proposed. After continuous rotary polishing of the right-angle edges of the sealing sharp edges and accurate control of the excess, the tool of the invention is used to grind the sealing sharp edges to obtain complete sharp edges, thereby reducing the difficulty of operating the machining center. The method of the invention is used to check the quality of the sharp edges and improve the quality of the sharp edges, thus changing the current situation where the sharp edges can only be machined by turning. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention. It is obvious that 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 work.

[0032] Figure 1 It is a schematic diagram of a sealed sharp-edge tool for a machining center of the present invention;

[0033] Among them, 1 is the tool body, 2 is the forming bowl, 3 is the clamping ring, 4 is the mounting screw, and 5 is the mounting handle.

[0034] Figure 2 It is a schematic diagram of machining a sealing sharp edge with a sealing sharp edge tool in a machining center of the present invention.

[0035] Figure 3 The present invention is a schematic diagram of a machining center sealing sharp edge structure of a guide hole end face according to an embodiment of the present invention.

[0036] Among them, the sharp edge of the seal requires a fillet R0.1max and no defects such as chipping are allowed, the end face requires a verticality of 0.02, and the hole ΦD requires a cylindricity of 0.02.

[0037] Figure 4 It is a schematic diagram of a sealing sharp edge structure of a machining center at the bottom of a guide hole according to an embodiment of the present invention;

[0038] Figure 5 It is a schematic diagram of an implementation method of a machining center seal sharp edge machining method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0040] The features and illustrative embodiments of various aspects of the present invention will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by illustrating examples of the present invention. The present invention is by no means limited to any specific settings and methods proposed below, but covers any improvements, replacements and modifications of structures, methods, devices without departing from the spirit of the present invention. In the accompanying drawings and the following description, known structures and technologies are not shown to avoid unnecessary ambiguity in the present invention.

[0041] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other, and the embodiments can refer to and quote each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0042] A first embodiment of the present invention is as follows Figure 1 As shown, the present invention provides a tool for sealing sharp edges for a machining center, comprising 1 a tool body, 2 a forming bowl, 3 a clamping ring, and 5 a mounting handle. The tool body 1, the forming bowl 2, and the clamping ring 3 are connected to one end of the mounting handle 5 via a mounting screw 4. The forming bowl 2 and the clamping ring 3 are arranged on both sides of the tool body 1 to clamp the tool body 1. The tool body 1 is pressed into shape using the forming bowl 2 and the clamping ring 3, and a machining tool for sealing sharp edges of a machining center with a stable structure is formed under the joint action of the mounting screws 4 and the mounting handle 5. The tool can be mounted on the tool handle of the machining center to perform the trimming of the sealing sharp edges. When the tool body is worn, the mounting screws 4 and the mounting handle 5 are disassembled using a wrench, and the tool body 1 can be replaced to reprocess the parts.

[0043] After continuous rotary polishing of the right-angle edge of the seal and precise control of the excess, the tool of the present invention is used to grind the sharp edge of the seal to obtain a complete sharp edge, which is used to remove burrs on the edges of the part shape and the thread buckle head, reducing the difficulty of operating the machining center. The method of the present invention is used to test the quality of the sharp edge and improve the quality of the sharp edge, changing the current situation where the sharp edge can only be processed by lathe.

[0044] The tool body 1 is made of a flexible material, preferably a scouring pad. If a hard material is used, the sharp edge structure will be destroyed when processing and sealing the sharp edge. The flexible material has a certain flexible space. During processing, the tool has a flexible space in the X, Y, and Z axis directions, reducing the tool's dependence on machine tool accuracy.

[0045] The tool body 1 is made by deforming a flexible circular ring, and the circular ring can be made of a variety of materials, with a wide source and low cost.

[0046] Among them, the tool body 1 is a conical structure with a hole, the outer cone angle of the tool body 1 is 30°-60°, the inner wall surface of the forming bowl 2 is a conical surface, and its inner cone angle is also 30°-60°, which cooperates with the outer cone surface of the tool body 1 to press the tool body 1.

[0047] refer to Figure 2 When the sealing sharp edge tool of the machining center of the present invention is used to process the sealing sharp edge, the sealing sharp edge processing tool is moved along the center of the hole, and when it is close to the sharp edge of the part by 1-2mm, the tool is rotated, the spindle speed S=500RPM, the feed F=30mm / min, the compression amount is 2mm, and the dwell time is 2min. The tool rotation is stopped, and the tool is quickly withdrawn from the part. After the tool body 1 is formed, the same working principle as that used for the sealing sharp edge processing is used for forming processing. At the same time, the fine edges on the sharp edge are formed to improve the brightness and integrity of the sharp edge and improve the sealing performance of the part when it is used.

[0048] Another embodiment of the present invention is to provide a method for machining a sealing sharp edge using the tool, which is used to machine the sealing sharp edge of the end face of the guide hole, comprising the following steps:

[0049] Before proceeding to step 1, check the relevant parameters of the machine tool used with the tool, including: measuring the radial movement of the machine tool spindle <0.015mm, the verticality of the spindle rotation to the worktable <0.015mm, the parallelism of the X-axis to the worktable <0.015mm, and the parallelism of the Y-axis to the worktable <0.015mm. By testing the accuracy of the machine tool, it is effectively guaranteed that the parts are perpendicular to the tool and the Z-axis when processing the sealing sharp edge end face, and are perpendicular to the sealing sharp edge end face when processing the sealing sharp edge hole, which effectively provides equipment guarantee for the processing of the sealing sharp edge;

[0050] In addition, appropriate tool materials and coatings are selected according to the material of the parts. Due to the different materials of the parts, tools of appropriate materials are selected to reduce tool wear and chip adhesion. These situations will cause the hole to fall off, and the chips adhering to the parts will produce flange burrs at the hole, which will eventually lead to poor hole quality of the processed parts. After that, the rotation accuracy of the finishing tool and the integrity of the tool tooth surface are tested to ensure that the tool has good verticality between the processed end face and the hole, and the formed sealing sharp edge is a 90° right angle. The inspection work after processing the sealing sharp edge has the effect of screening the sharp edge. After the sharp edge is processed, the imager and endoscope are used to check the sealing sharp edge of the part to see if there is a gap in the part to avoid continuing to proceed when the sharp edge processed after the tool wears has a gap, and timely discovery and timely repair.

[0051] Step 1: Rough machining of the sealing sharp edge end face:

[0052] Use tool T1=D8C0.5H50 end mill to rough-process the original end face to form a sealed sharp-edge end face, the number of tool teeth Z=4, the overhang length L=50mm, the processing accuracy 0.05mm, the spindle speed S=1500RPM, the feed F=150mm / min, the cutting depth Ap=0.5mm, and the processing allowance 0.1mm from the center difference; the main function of this step is to process the sharp-edged end face and remove the large allowance. At the same time, use an end mill with chamfer C0.5 to make the processed rear end face and the original end face transition through chamfering to reduce the generation of flanging burrs.

[0053] Step 2: Remove rough machining burrs:

[0054] Use tool T2=D8H70 ceramic brush to polish the burrs on the edges of the original end face and between the original end face and the rear end face, with an overhang length of L=70mm, a processing accuracy of 0.05mm, a spindle speed of S=5000RPM, and a duration of h=5s; the main function of this step is to polish the slight flanging burrs at the transition between the rear end face processed by the end mill and the chamfer of the original end face to avoid scratching the sharp edge of the tool during manual removal later, causing structural failure.

[0055] Step 3: Semi-finishing the middle hole:

[0056] Use tool T3 = D10H60 single-edge boring tool. Adjust the size of the single-edge boring tool before use. The adjustment amount is 30% of the positive inner hole size tolerance. Finish the middle hole. The number of tool teeth Z = 1, the overhang length L = 60mm, the processing accuracy 0.01mm, the spindle speed S = 500RPM, the feed F = 20mm / min, the cutting depth Ap = 0.2mm, and the processing allowance 0mm; the main function of this step is to bore the inner hole to ensure the inner hole size.

[0057] Step 4: Semi-finishing the sealing sharp edge end face:

[0058] Use tool T1=D8C0.5H50 end mill to semi-finish the rear end face formed in step one, with tool teeth number Z=4, overhang length L=50mm, machining accuracy 0.05mm, spindle speed S=4000RPM, feed F=200mm / min, cutting depth Ap=0.1mm, and machining allowance of 0.02mm from the center difference; the main function of this step is to semi-finish the sealing end face and further reduce the end face allowance.

[0059] Step 5: Finish the rear end surface of the sealing sharp edge:

[0060] Use tool T3 = D10H60 single-edged boring tool to finish the sharp edge end face of the seal processed in step 4. The number of tool teeth Z = 1, the overhang length L = 60mm, the processing accuracy 0.01mm, the spindle speed S = 1500RPM, the feed F = 20mm / min, and the cutting depth Ap = 0.02mm; the main function of this step is to finish the sealing end face and improve the surface finish and edge integrity.

[0061] Step 6: Finishing the middle hole:

[0062] Use tool T3 = D10H60 single-edge boring tool to finish the middle hole, with tool tooth number Z = 1, overhang length L = 60mm, machining accuracy 0.01mm, spindle speed S = 500RPM, feed F = 20mm / min, cutting depth Ap = 0mm to remove the burrs produced on the machined end face; the main function of this step is to remove the slight flange burrs at the sharp edge of the seal by boring to ensure uniform removal without chipping or gaps.

[0063] Step 7: Use a machining center to polish the sharp edges of the seal using a tool that can cut the sharp edges of the seal:

[0064] The diameter of the tool body 1 is larger than the diameter of the middle hole, and the outer end surface of the tool body 1 contacts the sharp edge of the seal and is polished to remove the floating burrs on the sharp edge of the seal;

[0065] Overhang length L = 50mm, spindle speed S = 500RPM, feed F = 30mm / min, compression amount 2mm, dwell for 2min, stop tool rotation, and quickly withdraw the tool from the part. The main function of this step is to polish and remove the fine burrs on the sharp edge of the seal, and at the same time push the hole to form a fillet of R0.1max. The compression amount of the tool during the processing of the sharp edge of the seal is stable, the edge force is uniform, the sharp edge formed is uniform, there is no collapse or notch, and the sealing of the sharp edge of the seal is guaranteed. For different materials and the size requirements of the sharp edge of the seal, the compression amount and dwell time need to be adjusted accordingly.

[0066] After the sealing sharp edge processing is completed, the tool rotation accuracy and the integrity of the tool tooth surface of the present invention are tested again to ensure that the tool has good verticality between the processed end face and the hole, and the formed sealing sharp edge is a 90° right angle. After the sealing sharp edge of the part is processed, the imager and endoscope are used to check the sealing sharp edge of the part to see if there is a gap in the part, so as to avoid continuing to proceed when the sharp edge processed after the tool is worn has a gap, and timely repair is carried out when it is discovered.

[0067] A third embodiment of the present invention provides a method for machining a sealing sharp edge using the tool, and the method for machining a sealing sharp edge at the bottom of a guide hole specifically comprises:

[0068] S21, rough machining of guide hole, use tool T1 = D10H50 end mill to rough machine the guide hole, tool teeth number Z = 4, overhang length L = 50mm, machining accuracy 0.05mm, spindle speed S = 4000RPM, feed F = 150mm / min, cutting depth Ap = 0.5mm, side wall machining allowance 0.1mm, bottom machining allowance 0.1mm;

[0069] S22 Rough machining of the sealing sharp edge end face, use tool T2 = D8C0.5H50 end mill for rough machining of the end face, tool teeth number Z = 4, overhang length L = 50mm, machining accuracy 0.05mm, spindle speed S = 1500RPM, feed F = 150mm / min, cutting depth Ap = 0.5mm, and leave a machining allowance of 0.1mm from the center difference;

[0070] S23 finish machining guide hole, use tool T3 = D20H60 single-edge boring tool, tool size is the inner hole size difference + 30% tolerance band is the size that the boring tool needs to adjust. Finish machining the middle hole, tool teeth Z = 1, overhang L = 60mm, machining accuracy 0.01mm, spindle speed S = 500RPM, feed F = 20mm / min, cutting depth Ap = 0.1mm;

[0071] S24, rough machining of the sealing sharp edge end face, using tool T2 = D8C0.5H50 end mill for rough machining of the end face, tool teeth number Z = 4, overhang length L = 50mm, machining accuracy 0.05mm, spindle speed S = 1500RPM, feed F = 150mm / min, cutting depth Ap = 0.5mm, and a machining allowance of 0.1mm from the center difference;

[0072] S25, remove rough machining burrs, use tool T4 = D8H70 ceramic brush to polish the end face and edge burrs, overhang length L = 70mm, machining accuracy 0.05mm, spindle speed S = 5000RPM, time h = 5s;

[0073] S26, semi-finishing the middle hole, using tool T5 = D10H60 single-edge boring tool, the tool size is the inner hole size difference + 30% tolerance band is the size that the boring tool needs to adjust. Finishing the middle hole, tool teeth Z = 1, overhang L = 60mm, machining accuracy 0.01mm, spindle speed S = 500RPM, feed F = 20mm / min, cutting depth Ap = 0.2mm, leaving machining allowance 0mm;

[0074] S27, semi-finishing the sealing sharp edge end face, using tool T2 = D8C0.5H50 end mill for semi-finishing of the end face, tool number Z = 4, overhang length L = 50mm, machining accuracy 0.05mm, spindle speed S = 4000RPM, feed F = 200mm / min, cutting depth Ap = 0.1mm, and machining allowance 0.02mm from the center difference;

[0075] S28, fine machining of the seal sharp edge end face, use tool T5 = D10H60 single-edge boring tool to fine-machine the seal sharp edge, tool tooth number Z = 1, overhang length L = 60mm, machining accuracy 0.01mm, spindle speed S = 1500RPM, feed F = 20mm / min, cutting depth Ap = 0.02mm;

[0076] S29, finishing the middle hole, using tool T5 = D10H60 single-edge boring tool, finishing the middle hole, tool tooth number Z = 1, overhang length L = 60mm, machining accuracy 0.01mm, spindle speed S = 500RPM, feed F = 20mm / min, cutting depth Ap = 0mm. This step is mainly to remove the burrs generated by the end surface;

[0077] S30, use the sealing sharp edge processing tool of the present invention (the tool diameter is larger than the hole diameter) to polish the sealing sharp edge, with an overhang length of L = 50 mm, a spindle speed of S = 500 RPM, a feed of F = 30 mm / min, a compression amount of 2 mm, a dwell time of 2 min, the tool rotation is stopped, and the tool is quickly withdrawn from the part.

[0078] S31, check the precision of the finishing tool rotation and the integrity of the tool tooth surface, ensure that the tool has good verticality on the processed end face and hole, and the formed sealing sharp edge is a 90° right angle. The inspection work after processing the sealing sharp edge has the effect of screening the sharp edge. After the sharp edge is processed, use an imager and an endoscope to check the sealing sharp edge of the part to see if there is a gap in the part, to avoid continuing to proceed when the sharp edge of the processing has a gap after the tool is worn, and timely discovery and repair.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the field can easily think of various equivalent modifications or substitutions within the technical scope disclosed by the present invention, and these modifications or substitutions should all be covered within the protection scope of the present invention.

Claims

1. A tool with sealed sharp edges for a machining center, characterized in that: The utility model comprises a tool body, a forming bowl, a clamping ring and a mounting handle. The tool body, the forming bowl and the clamping ring are sleeved on one end of the mounting handle. The forming bowl and the clamping ring are arranged on both sides of the tool body to clamp the tool body.

2. The tool with sealed sharp edges for a machining center according to claim 1, characterized in that: The tool body, the forming bowl and the clamping ring are sleeved on one end of the mounting handle through mounting screws.

3. The tool with sealed sharp edges for a machining center according to claim 1, characterized in that: The tool body 1 is made of flexible material.

4. The tool with sealed sharp edges for a machining center according to claim 1, characterized in that: The tool body is a conical structure with a hole, and the inner wall surface of the forming bowl is a conical surface, which cooperates with the outer conical surface of the tool body to press the tool body.

5. The tool with sealed sharp edges for a machining center according to claim 4, characterized in that: The outer cone angle of the tool body is 30°-60°.

6. A method for processing a sealing sharp edge using a tool as claimed in any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1: Rough machining of the sealing sharp edge end face: Use tool T1 = D8C0.5H50 end mill to rough-process the original end face to form a sealed sharp edge end face, tool teeth number Z = 4, overhang length L = 50mm, machining accuracy 0.05mm, spindle speed S = 1500RPM, feed F = 150mm / min, cutting depth Ap = 0.5mm, and leave a machining allowance of 0.1mm from the center difference; Step 2: Remove rough machining burrs: Use tool T2 = D8H70 ceramic brush to polish the burrs on the original end face and the edge between the original end face and the rear end face, with an overhang length of L = 70 mm, a machining accuracy of 0.05 mm, a spindle speed of S = 5000 RPM, and a duration of h = 5 s; Step 3: Semi-finishing the middle hole: Use tool T3 = D10H60 single-edge boring tool. Adjust the size of the single-edge boring tool before use. The adjustment amount is 30% of the positive tolerance of the inner hole size. Finish the middle hole. The number of tool teeth Z = 1, the overhang length L = 60mm, the processing accuracy is 0.01mm, the spindle speed S = 500RPM, the feed F = 20mm / min, the cutting depth Ap = 0.2mm, and the processing allowance is 0mm. Step 4: Semi-finishing the sealing sharp edge end face: Use tool T1 = D8C0.5H50 end mill to semi-finish the rear end face formed in step 1, with tool teeth Z = 4, overhang L = 50mm, machining accuracy 0.05mm, spindle speed S = 4000RPM, feed F = 200mm / min, cutting depth Ap = 0.1mm, and machining allowance 0.02mm from the center difference; Step 5: Finish the rear end surface of the sealing sharp edge: Use tool T3 = D10H60 single-edge boring tool to finish the sealing sharp edge end surface processed in step 4, tool tooth number Z = 1, overhang length L = 60mm, processing accuracy 0.01mm, spindle speed S = 1500RPM, feed F = 20mm / min, cutting depth Ap = 0.02mm; Step 6: Finishing the middle hole: Use tool T3 = D10H60 single-edge boring tool to finish the middle hole, tool tooth number Z = 1, overhang length L = 60mm, machining accuracy 0.01mm, spindle speed S = 500RPM, feed F = 20mm / min, cutting depth Ap = 0mm; Step 7: Use a machining center to polish the sharp edges of the seal with a tool that can cut the sharp edges: The diameter of the tool body 1 is larger than the diameter of the middle hole, and the outer end surface of the tool body 1 contacts the sharp edge of the seal and is polished to remove the floating burrs on the sharp edge of the seal; Overhang length L = 50mm, spindle speed S = 500RPM, feed F = 30mm / min, compression amount 2mm, dwell for 2min, stop tool rotation, and quickly withdraw the tool from the part.

7. The method for processing a sealing sharp edge using a tool according to claim 6, characterized in that: Before proceeding to step one, it is necessary to check the relevant parameters of the machine tool used with the tool, including: measuring the radial play of the machine tool spindle <0.015mm, the verticality of the spindle rotation to the work table <0.015mm, the parallelism of the X-axis to the work table <0.015mm, and the parallelism of the Y-axis to the work table <0.015mm.

8. The method for processing a sealing sharp edge using a tool according to claim 6, characterized in that: Before proceeding to step one, select the appropriate tool material and coating according to the part material, and check the finishing tool rotation accuracy and tool tooth surface integrity.

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