A tool and method for machining bottom arc and coarse tooth profile of main shaft blade root tenon groove tooth profile

Abstract

The invention discloses a tool and method for processing the bottom arc and rough tooth profile of a main shaft blade root tenon groove tooth profile. A fan-shaped cutting piece is provided, and the arc radius of the arc tool is designed according to the bottom arc R of the blade root tenon groove, which belongs to a structure of a forming tool, has good rigidity, high dimensional accuracy requirements, and improves processing efficiency; a toothed cutting piece is provided, and the tooth profile on the toothed tool is designed according to the blade root tenon groove tooth profile, which belongs to a structure of a forming tool, has good rigidity, high dimensional accuracy requirements, and improves processing efficiency; the method for processing the blade root tenon groove tooth profile provided by the invention uses an arc tool and a toothed tool to perform rough processing on the tenon groove tooth profile, which can efficiently remove materials and improve processing efficiency; a CNC arc turning tool is used to perform fine processing on the blade root tenon groove tooth profile, which can ensure the dimensional accuracy of the tooth surface and improve the surface roughness, and the two rough and fine processing processes are combined to solve the problem of blade root tenon groove processing, meet the requirements of drawings and production, and improve production efficiency.

Description

Technical Field

[0001] The invention relates to a machining tool and a method, and in particular to a machining tool and a method for a bottom arc and a coarse tooth shape of a main shaft blade root tenon groove tooth shape. Background Art

[0002] The main shaft is an important part of the axial compressor. The blades are installed on the main shaft through the main shaft blade root tenon groove to realize their functions. The processing quality of the main shaft blade root tenon groove is directly related to the dynamic balance of the rotor, and also to the performance and service life of the entire unit. The main shaft of the axial compressor is generally made of alloy steel. The main shaft blade root tenon groove is a rotary special-shaped groove located on the wheel hub, which generally has multiple levels. The processing of the main shaft blade root tenon groove is completed on a lathe.

[0003] The processing of the blade root tenon not only needs to ensure that the tooth profile size accuracy meets the requirements of the design drawings, but also has a very high tooth surface roughness requirement of Ra1.6, and the minimum fillet of the tenon tooth profile is R0.8. If a forming turning tool is used for fine processing, the entire blade root tenon tooth profile surface is in contact with the tool, the contact area is large, the processing resistance is large, and the tooth surface size accuracy and surface roughness are difficult to guarantee; if CNC arc turning tools are used for both rough and fine processing, the processing efficiency is low and the economy is not high.

[0004] Therefore, the blade root tenon-and-groove tooth profile processing technology in the prior art has the problem of tool shape mismatch, which leads to the inability to ensure processing accuracy and unreasonable arrangement of tools during processing, resulting in low processing efficiency. Summary of the invention

[0005] The purpose of the present invention is to provide a tool and method for machining the tenon tooth profile of a main shaft blade root, so as to solve the problems in the prior art of blade root tenon tooth profile machining technology, such as tool shape mismatch, resulting in the inability to ensure machining accuracy, and unreasonable arrangement of the tool during machining, resulting in low machining efficiency.

[0006] In order to achieve the above tasks, the present invention adopts the following technical solutions:

[0007] A bottom arc machining tool for a main shaft blade root tenon groove tooth type, comprising a first tool handle and a first tool head connected to the first tool handle, wherein the first tool head comprises a first tool body and a first blade, wherein the first blade is stacked and mounted on the first tool body, and the axial symmetry plane of the first tool body coincides with the axial symmetry plane of the first blade;

[0008] A pair of fan-shaped cutting pieces are arranged at the end of the first blade away from the first handle, and the pair of fan-shaped cutting pieces are arranged on both sides of the first blade respectively; the fan-shaped cutting pieces are used for processing the bottom arc of the blade root tenon groove.

[0009] Furthermore, a distance a that the sector-shaped cutting member extends beyond the first blade is in a range of 3.9≤a≤9.7, expressed in mm.

[0010] Furthermore, a blade retreat groove is provided at the connection between the fan-shaped cutting element and the first blade; and a cutting groove is provided at the connection between the first blade handle and the first blade head.

[0011] Furthermore, a pair of blade support blocks for providing rigid support force for the fan-shaped cutting member are arranged on both sides of the first blade body, and the blade support blocks are also connected to the fan-shaped cutting member;

[0012] The distance between the sector cutting element and the first blade body axis is greater than the distance between the blade supporting block and the first blade body axis.

[0013] A coarse tooth processing tool for a main shaft blade root tenon-groove tooth type, comprising a second tool handle and a second tool head connected to the second tool handle, wherein the second tool head comprises a second tool body and a second blade, wherein the second blade is stacked and installed on the second tool body, and the axial symmetry surface of the second tool body and the axial symmetry surface of the second blade coincide with each other;

[0014] A pair of toothed cutting members are arranged at the end of the second blade away from the second handle; the pair of toothed cutting members are arranged on both sides of the second blade respectively; the pair of toothed cutting members are used for processing the coarse tooth shape of the blade root tenon groove.

[0015] Further, the toothed cutting member comprises first cutting teeth and second cutting teeth sequentially arranged along the axial direction of the second blade;

[0016] The first cutting tooth is trapezoidal, and the bottom surface of the first cutting tooth is connected to the side surface of the second blade.

[0017] Furthermore, the tooth spacing d of the toothed cutting member has a value range of 7≤d≤26.5, in mm; the tooth height c of the toothed cutting member has a value range of 3.5≤c≤9.2, in mm.

[0018] A blade root tenon groove tooth profile processing method is used to open a tooth-shaped blade root tenon groove on a part to be processed, wherein the part to be processed is provided with a straight groove, and the processing is performed according to the following steps:

[0019] Step 1, using a bottom arc processing tool to perform bottom arc rough processing on the straight groove on the part to be processed to obtain a bottom arc blade root tenon groove;

[0020] The bottom arc processing tool is a bottom arc processing tool with a main shaft blade root tenon-groove tooth type;

[0021] Step 2, using a rough-tooth processing tool to perform rough-tooth processing on the inner side of the bottom arc blade root tenon groove to obtain a rough-tooth blade root tenon groove;

[0022] The coarse tooth processing tool is a coarse tooth processing tool with a main shaft blade root tenon-groove tooth shape;

[0023] Step 3: Use a CNC circular turning tool to fine-process the coarse-toothed blade root tenon groove to obtain a toothed blade root tenon groove.

[0024] Furthermore, the step 1 is specifically performed according to the following steps:

[0025] Step 1.1, setting the straight groove tool on the part to be processed, specifically includes:

[0026] Placing a tool setting block at the bottom of the straight groove on the part to be processed;

[0027] Insert the bottom arc machining tool into the straight groove on the part to be machined and press the tool setting block to complete the radial position determination of the tool;

[0028] On the basis of the radial position of the tool being determined, the bottom arc processing tool is placed close to the side of the straight groove on the processing part to complete the axial position determination of the tool;

[0029] Step 1.2: After tool alignment is completed, a bottom arc machining tool is used to perform bottom arc rough machining on the side surface of the straight groove to obtain a bottom arc blade root tenon groove.

[0030] Furthermore, the step 2 is performed according to the following steps:

[0031] Step 2.1, selecting the size of the rough tooth processing tool according to the shape and size of the toothed blade root tenon groove to obtain the toothed tool;

[0032] Step 2.2, using a tool setting block to set the toothed tool in the bottom arc blade root tenon groove;

[0033] Step 2.3: After the tool setting is completed, a toothed tool is used to perform rough tooth processing on the side surface of the bottom arc blade root tenon groove to obtain a rough toothed blade root tenon groove.

[0034] Compared with the prior art, the present invention has the following technical effects:

[0035] 1. The spindle blade root tenon groove tooth processing tool provided by the present invention is provided with a fan-shaped cutting piece, and the arc radius of the arc tool is designed according to the bottom arc R of the blade root tenon groove, which belongs to a structure of a forming tool, improves the production and processing efficiency, improves the rigidity of the tool, and improves the dimensional accuracy of the processed parts;

[0036] 2. The spindle blade root tenon groove tooth profile processing tool provided by the present invention is provided with a toothed cutting piece, and the tooth profile on the toothed tool is designed according to the blade root tenon groove tooth profile, which belongs to a structure of a forming tool, improves the production and processing efficiency, improves the rigidity of the tool, and improves the dimensional accuracy of the processed parts;

[0037] 3. The processing method of the blade root tenon tooth profile provided by the present invention uses an arc tool and a toothed tool to perform rough processing on the tenon tooth profile, which can efficiently remove material and improve processing efficiency; a CNC arc turning tool is used to perform fine processing on the blade root tenon tooth profile, which can ensure the tooth surface dimensional accuracy and improve surface roughness. The combination of the two rough and fine processing processes solves the problem of blade root tenon processing, meets the drawing and production requirements, and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the blade root tenon groove in the prior art;

[0039] Figure 2 A top view of a tool for machining the tenon-groove tooth profile of a main shaft blade root provided in the first embodiment of the present invention;

[0040] Figure 3 A side view of a tool for machining the tenon-groove tooth profile of a main shaft blade root provided in the first embodiment of the present invention;

[0041] Figure 4 A cross-sectional view along the AA direction of a tool for machining the tenon groove tooth profile of a main shaft blade root provided in the first embodiment of the present invention;

[0042] Figure 5 A top view of a tool for machining the tenon-groove tooth profile of a main shaft blade root provided in the second embodiment of the present invention;

[0043] Figure 6 A side view of a tool for machining the tenon-groove tooth profile of a main shaft blade root provided in the second embodiment of the present invention;

[0044] Figure 7 A cross-sectional view along the AA direction of a tool for machining the tenon groove tooth profile of a main shaft blade root provided in the second embodiment of the present invention;

[0045] Figure 8 A schematic diagram of radial tool setting for bottom arc rough machining provided by one embodiment of the present invention;

[0046] Fig. 9 A schematic diagram of axial tool setting for bottom arc rough machining provided by one embodiment of the present invention;

[0047] Fig.10 A schematic diagram of a bottom arc rough machining right groove provided by an embodiment of the present invention;

[0048] Fig.11A schematic diagram of a bottom arc rough machining left groove provided by an embodiment of the present invention;

[0049] Fig.12 A schematic diagram of radial tool setting for rough machining of tooth profile provided by one embodiment of the present invention;

[0050] Fig.13 A schematic diagram of axial tool setting for rough machining of tooth profile provided by one embodiment of the present invention;

[0051] Fig.14 A schematic diagram of a right groove of a tooth profile rough machining provided by an embodiment of the present invention;

[0052] Fig.15 A schematic diagram of a left groove of a toothed rough machining provided by an embodiment of the present invention;

[0053] Fig.16 A schematic diagram of radial tool setting for finishing provided by an embodiment of the present invention;

[0054] Fig.17 A schematic diagram of axial tool setting for finishing provided by an embodiment of the present invention;

[0055] Fig.18 A schematic diagram of a finish-machined right groove provided by an embodiment of the present invention;

[0056] Fig.19 A schematic diagram of a finish-machined left groove provided for an embodiment of the present invention.

[0057] The numbers in the figure represent: 1-first tool handle, 2-first tool head, 3-retracting groove, 4-cutting groove, (2-1)-first tool body, (2-2)-first blade, (2-3)-fan-shaped cutting element, (2-4)-blade support block, I-second tool handle, II-second tool head, (II-I)-second tool body, (II-II)-second blade, (II-III)-toothed cutting element, (II-III-I)-first cutting tooth, (II-III-II)-second cutting tooth, A-bottom arc processing tool, B-straight groove, C-bottom arc blade root tenon groove, D-rough tooth processing tool, E-rough tooth blade root tenon groove, F-CNC circular arc turning tool, G-toothed blade root tenon groove, H-tool block. DETAILED DESCRIPTION

[0058] The technical solution of the present invention is described below in conjunction with the accompanying drawings and specific embodiments.

[0059] First, the nouns appearing in the present invention are explained:

[0060] Blade root groove: Figure 1 As shown, there is a tooth-like structure in the groove.

[0061] Embodiment 1

[0062] In this embodiment, a spindle blade root tenon-groove tooth type machining tool is disclosed, comprising a first tool handle 1 and a first tool head 2 connected to the first tool handle 1, characterized in that the first tool head 2 comprises a first tool body 2-1 and a first blade 2-2, the first blade 2-2 is stacked and installed on the first tool body 2-1, and the axial symmetry plane of the first tool body 2-1 coincides with the axial symmetry plane of the first blade 2-2;

[0063] A pair of fan-shaped cutting pieces 2-3 are arranged at the end of the first blade 2-2 away from the first handle 1, and the pair of fan-shaped cutting pieces 2-3 are respectively arranged on both sides of the first blade 2-2; the fan-shaped cutting pieces 2-3 are used for processing the bottom arc of the blade root groove.

[0064] like Figure 2-4 As shown, in this embodiment, an arc cutting tool is designed. The tool as a whole is divided into two parts, namely a first tool handle 1 and a tool head 2. The tool head 2 is installed at the top of the first tool handle 1. The tool head 2 includes a first tool body 2-1 and a first blade 2-2, wherein the first tool body 2-1 is used to provide a rigid supporting force for the first blade 2-2 to prevent the first blade 2-2 from breaking during use. In this embodiment, the first tool body 2-1 and the first blade 2-2 are arranged along the radial direction of the first tool handle 1, as shown in FIG. Figure 2 As shown, the first cutter body 2-1 and the first blade 2-2 are connected by bolts.

[0065] like Figure 2 As shown, in order to achieve arc cutting, a fan-shaped cutting piece 2-3 is provided on the first blade 2-2. The fan-shaped cutting piece 2-3 is provided in pairs on both sides of the first blade 2-2. The fan-shaped cutting piece 2-3 can be integrally formed with the first blade 2-2.

[0066] In this embodiment, if Figure 2 As shown, the shape of the sector cutting element 2-3 is a portion of a circle, wherein the radius R of the circle ranges from [2.4 mm, 16.1 mm].

[0067] Optionally, the distance a that the sector-shaped cutting member 2-3 extends from the first blade 2-2 ranges from 3.9≤a≤9.7, in mm.

[0068] In this embodiment, if Figure 2 As shown, the distance a is the straight-line distance from the outer edge of the blade 2-2 to the outer edge of the fan-shaped cutting member 2-3.

[0069] In this embodiment, if Figure 2 As shown, the length b of the sector cutting piece 2-3 ranges from [4.6 mm, 17.1 mm].

[0070] Optionally, a blade retreat groove 3 is provided at the connection between the sector-shaped cutting element 2-3 and the first blade 2-2.

[0071] In this embodiment, in order to facilitate cutting by the tool, a tool relief groove 3 is provided. The purpose of providing the tool relief groove 3 is to avoid interference between the tool bar and the workpiece during processing.

[0072] Optionally, a cutting groove 4 is provided at the connection between the first tool handle 1 and the first tool head 2 .

[0073] In this embodiment, in order to facilitate cutting by the tool, a cutting groove 4 is provided. The purpose of providing the cutting groove 4 is to guide the iron chips and facilitate chip removal during processing.

[0074] Optionally, a pair of blade support blocks 2-4 for providing rigid support force for the fan-shaped cutting member 2-3 are provided on both sides of the first blade body 2-1, and the blade support blocks 2-4 are also connected to the fan-shaped cutting member 2-3;

[0075] The distance between the sector cutting element 2-3 and the axis of the first blade body 2-1 is greater than the distance between the blade support block 2-4 and the axis of the first blade body 2-1.

[0076] In this embodiment, if Figure 3 As shown, in order to achieve rigid support for the fan-shaped cutting member 2-3 and prevent the fan-shaped cutting member 2-3 from breaking during the cutting process, a blade support block 2-3 is provided, and a blade support block 2-4 is provided below the fan-shaped cutting member 2-3 to provide supporting force. In order to ensure the normal use of the fan-shaped cutting member 2-3, the blade support block 2-4 is retracted below the fan-shaped cutting member 2-3.

[0077] Embodiment 2

[0078] A spindle blade root tenon-groove tooth type machining tool, comprising a second tool handle I and a second tool head II connected to the second tool handle I, the second tool head II comprising a second tool body II-I and a second blade II-II, the second blade II-II is stacked and installed on the second tool body II-I, and the axial symmetry surface of the second tool body II-I coincides with the axial symmetry surface of the second blade II-II;

[0079] A pair of toothed cutting members II-III is arranged at the end of the second blade II-II away from the second handle I; a pair of toothed cutting members II-III are respectively arranged on both sides of the second blade II-II; a pair of toothed cutting members II-III is used for processing the coarse teeth of the blade root groove.

[0080] like Figure 5-7As shown, in this embodiment, a toothed processing tool is designed, which is different from the arc processing tool in the first embodiment in that the fan-shaped cutting members 2-3 in the first embodiment are replaced by toothed cutting members II-III, and the toothed cutting members II-III are used to realize toothed processing and cutting.

[0081] Optionally, the toothed cutting member II-III comprises a first cutting tooth II-III-I and a second cutting tooth II-III-II which are sequentially arranged along the axial direction of the second blade II-II;

[0082] The first cutting tooth II-III-I is trapezoidal, and the bottom surface of the first cutting tooth II-III-I is connected to the side surface of the second blade II-II.

[0083] In this embodiment, the number of the second cutting teeth II-III-II in the toothed cutting member II-III can be adjusted according to actual needs, but only one first cutting tooth II-III-I is provided in the toothed cutting member II-III.

[0084] In this embodiment, if Figure 5 As shown, the first cutting tooth II-III-I is a trapezoid, and the right side contour of the trapezoid is the same as the mortise and tenon contour, and the right side contour must be designed to match the bottom arc turning tool.

[0085] In this embodiment, if Figure 5 As shown, the angle α between the second cutting tooth II-III-II and the second blade II-II is in the range of [29°, 37°] or [40°, 43°].

[0086] In this embodiment, similar to the arc processing tool in the first embodiment, a blade support block and a cutting groove are also provided, and the functions realized are the same as those in the first embodiment.

[0087] Optionally, the tooth spacing d of the toothed cutting member II-III has a value range of 7≤d≤26.5, in mm; the tooth height c of the toothed cutting member II-III has a value range of 3.5≤c≤9.2, in mm.

[0088] In this embodiment, if Figure 5 As shown, the tooth spacing d is the straight-line distance between two adjacent teeth.

[0089] In this embodiment, if Figure 5 As shown, the tooth height c of the toothed cutting member II-III, that is, the distance c that each cutting tooth protrudes from the blade II-II, is the same.

[0090] Embodiment 3

[0091] A blade root tenon groove tooth profile processing method is used to open a tooth-shaped blade root tenon groove on a part to be processed, and a straight groove is opened on the part to be processed, and the processing is performed according to the following steps:

[0092] Step 1: Use a bottom arc processing tool A to perform bottom arc rough processing on the straight groove B on the part to be processed to obtain a bottom arc blade root tenon groove C;

[0093] The bottom arc processing tool A is a bottom arc processing tool of the spindle blade root tenon-groove tooth type of the first embodiment;

[0094] Step 2, using a rough tooth processing tool D to perform rough tooth processing on the inner side of the bottom arc blade root tenon groove (C) to obtain a rough tooth blade root tenon groove (E);

[0095] The rough tooth processing tool D is the rough tooth processing tool D of the main shaft blade root tenon groove tooth type of the second embodiment;

[0096] Step 3: Use a CNC circular turning tool F to fine-process the coarse-toothed blade root tenon groove (E) to obtain a toothed blade root tenon groove (G).

[0097] In this embodiment, a processing method that is completely different from the prior art is provided, in which a combined process method is adopted in which a bottom arc forming turning tool A and a tooth profile forming turning tool D are used to perform rough processing on the spindle tenon and groove tooth profile, and a CNC circular arc turning tool F is used to perform fine processing on the spindle tenon and groove tooth profile.

[0098] In order to improve the processing efficiency, the bottom arc processing tool A is used to rough-process the bottom arc of the straight groove, and the rough tooth processing tool D is used to rough-process the tooth shape of the side of the straight groove. In order to improve the dimensional accuracy and surface roughness of the main shaft tenon groove, the CNC arc turning tool F is used for fine processing and CNC program processing to finally complete the processing of the entire tooth-shaped blade root tenon groove. Compared with the prior art in which only the forming turning tool is used to process the main shaft blade root tenon groove, the processing method provided in this embodiment better guarantees the dimensional accuracy and surface roughness of the design drawing.

[0099] Optionally, step 1 is specifically performed according to the following steps:

[0100] Step 1.1: Set the tool on the straight groove B on the part to be processed, including:

[0101] Place a tool setting block at the bottom of the straight groove B on the part to be machined;

[0102] Insert the bottom arc machining tool A into the straight groove B on the part to be machined and press the tool setting block H to complete the radial position determination of the tool;

[0103] On the basis of the determination of the radial position of the tool, the bottom arc processing tool A is placed close to the side of the straight groove B on the processed part to complete the determination of the axial position of the tool;

[0104] Step 1.2: After tool setting is completed, use the bottom arc processing tool A to perform bottom arc rough processing on the side of the straight groove B to obtain the bottom arc blade root tenon groove C.

[0105] In this embodiment, if Figure 8-11 As shown, Figure 8-9 Figure 10-11 is a schematic diagram of tool setting, and the bottom arc processing tool A is used to rough-process the bottom arc of the blade root tenon groove. The bottom arc processing tool A is divided into two types of tools, left and right, which are used for rough-processing the left and right arcs on the bottom of the tenon groove respectively.

[0106] In this embodiment, the tool setting method (i.e., the machining coordinate system) is determined when the bottom arc machining tool A is used: the radial position of the tool (X-axis 0 point) is determined, and the tool is set at the bottom of the straight groove using a tool setting block, and the X-axis 0 point is determined according to the thickness of the tool setting block. The axial position of the tool (Z-axis 0 point) is determined, and the tool is set at the side of the straight groove B and set to the Z-axis 0 point. After the X-axis and Z-axis 0 points are determined, the bottom arc machining tool A is fed δmm to the left and right sides of the spindle axis respectively, and a single-side axial allowance of 0.2mm is left. After moving along the Y-axis direction, the rough machining of the mortise and tenon bottom arc is completed.

[0107] Optionally, step 2 is performed as follows:

[0108] Step 2.1, select the size of the rough tooth processing tool D according to the shape and size of the toothed blade root tenon groove to obtain the toothed tool;

[0109] Step 2.2, use the tool setting block H to complete the tool setting of the toothed tool in the bottom arc blade root tenon groove C;

[0110] Step 2.3: After the tool setting is completed, use a toothed tool to perform rough tooth processing on the side of the bottom arc blade root tenon C to obtain a rough toothed blade root tenon E.

[0111] In this embodiment, if Figure 12-15 As shown, a rough tooth processing tool D, i.e. a toothed tool, is used to rough-process the blade root tenon tooth profile. There are teeth on both sides of the toothed tool. The structure and size of the tooth profile are designed according to the tenon design drawing to be cut. After the tooth profile forming turning tool is manufactured, it is used in production after passing the three-coordinate inspection.

[0112] The tool setting method (i.e., machining coordinate system) is determined when the turning tool of rough tooth profile machining tool D is used: the radial position of the tool (X-axis 0 point) is determined, and the tool setting block is used to set the tool at the bottom of the straight groove. The X-axis 0 point is determined according to the thickness of the tool setting block. The axial position of the tool (Z-axis 0 point) is determined, and the tool is set at the side of the straight groove and set to the Z-axis 0 point. After the X-axis and Z-axis 0 points are determined, the tooth profile forming turning tool is fed δmm along the left and right sides of the spindle axis, and the axial single-side allowance is 0.2mm. After moving along the Y-axis direction, the rough machining of the mortise and tenon tooth profile is completed.

[0113] In this embodiment, if Figure 16-19 As shown, a CNC circular turning tool F is used to finish the coarse-toothed blade root tenon E. The CNC circular turning tool is divided into two types of tools, left and right, which are used for finishing the left and right tenon teeth respectively.

[0114] The tool setting method (i.e. machining coordinate system) when using CNC arc turning tool F is determined as follows: Fig.16 As shown, first the radial position of the tool (X-axis 0 point) is determined, the tool is aligned on the spindle outer circle, and the X-axis 0 point is set according to the tool arc radius. The axial position of the tool (Z-axis 0 point) is determined, as shown in the figure. Fig.17 As shown, the tool is aligned on the side of the straight groove, and the Z-axis 0 point is set according to the tool arc radius. After the coordinate system is determined, the CNC program is used to fine-machine the tooth profiles on the left and right sides of the tenon groove to meet the requirements of the drawing, completing the machining of the tenon groove tooth profile of the axial flow spindle blade root.

[0115] In this embodiment, the arc tool in Example 1 and the tooth tool in Example 2 are used to perform rough processing on the tenon tooth profile, which can efficiently remove material and improve processing efficiency; the CNC arc turning tool is used to perform fine processing on the blade root tenon tooth profile, which can ensure the tooth surface dimensional accuracy and improve the surface roughness. The present invention combines the two rough and fine processing processes, solves the problem of blade root tenon processing, meets the drawing and production requirements, and improves production efficiency.

Claims

1. A spindle blade root tenon-groove tooth profile machining tool, comprising a bottom arc machining tool and a coarse tooth profile machining tool, the bottom arc machining tool comprising a first tool handle (1) and a first tool head (2) connected to the first tool handle (1), characterized in that: The first cutter head (2) comprises a first cutter body (2-1) and a first blade (2-2), wherein the first blade (2-2) is stacked and mounted on the first cutter body (2-1), and the axial symmetry plane of the first cutter body (2-1) coincides with the axial symmetry plane of the first blade (2-2); a pair of fan-shaped cutting pieces (2-3) are arranged at the end of the first blade (2-2) away from the first cutter handle (1), and the pair of fan-shaped cutting pieces (2-3) are respectively arranged on both sides of the first blade (2-2); the fan-shaped cutting pieces (2-3) are used for processing the bottom arc of the blade root tenon groove; The coarse tooth processing tool comprises a second tool handle (I) and a second tool head (II) connected to the second tool handle (I), characterized in that the second tool head (II) comprises a second tool body (II-I) and a second blade (II-II), the second blade (II-II) is stacked and installed on the second tool body (II-I), and the axial symmetry plane of the second tool body (II-I) coincides with the axial symmetry plane of the second blade (II-II); a pair of toothed cutting members (II-III) are arranged at the end of the second blade (II-II) away from the second tool handle (I); the pair of toothed cutting members (II-III) are respectively arranged on both sides of the second blade (II-II); the pair of toothed cutting members (II-III) are used for processing the coarse tooth shape of the blade root tenon groove.

2. The spindle blade root tenon-groove tooth processing tool according to claim 1, characterized in that: The value range of the distance a that the fan-shaped cutting member (2-3) extends from the first blade (2-2) is , unit is mm.

3. The main shaft blade root tenon-groove tooth processing tool according to claim 1, characterized in that: A blade retreat groove (3) is provided at the connection between the fan-shaped cutting element (2-3) and the first blade (2-2); and a cutting groove (4) is provided at the connection between the first blade handle (1) and the first blade head (2).

4. The main shaft blade root tenon-groove tooth processing tool according to claim 1, characterized in that: A pair of blade support blocks (2-4) for providing rigid support force for the fan-shaped cutting piece (2-3) are arranged on both sides of the first blade body (2-1); the blade support blocks (2-4) are also connected to the fan-shaped cutting piece (2-3); The distance between the fan-shaped cutting element (2-3) and the axis of the first knife body (2-1) is greater than the distance between the blade support block (2-4) and the axis of the first knife body (2-1).

5. The main shaft blade root tenon-groove tooth processing tool according to claim 1, characterized in that: The toothed cutting member (II-III) comprises a first cutting tooth (II-III-I) and a second cutting tooth (II-III-II) which are sequentially arranged along the axial direction of the second blade (II-II); The first cutting teeth (II-III-I) are trapezoidal in shape, and the bottom surface of the first cutting teeth (II-III-I) is connected to the side surface of the second blade (II-II).

6. The main shaft blade root tenon-groove tooth processing tool according to claim 1, characterized in that: The tooth spacing d of the toothed cutting element (II-III) has a value range of , in mm; the tooth height c of the toothed cutting member (II-III) has a value range of , unit is mm.

7. A method for machining a main shaft blade root tenon groove tooth profile, used for opening a tooth-shaped blade root tenon groove on a part to be machined, wherein a straight groove (B) is opened on the part to be machined, characterized in that: Follow these steps: Step 1, using a bottom arc processing tool (A) to perform bottom arc rough processing on the straight groove (B) on the part to be processed to obtain a bottom arc blade root tenon groove (C); The bottom arc machining tool (A) is a bottom arc machining tool of the machining tool for the tenon-groove tooth type of the main shaft blade root as claimed in any one of claims 1 to 6; Step 2, using a rough-tooth processing tool (D) to perform rough-tooth processing on the inner side of the bottom arc blade root tenon groove (C) to obtain a rough-tooth blade root tenon groove (E); The coarse-tooth processing tool (D) is a coarse-tooth processing tool of the spindle blade root tenon-groove tooth processing tool as claimed in any one of claims 1 to 6; Step 3: Use a CNC circular turning tool (F) to fine-process the coarse-toothed blade root tenon groove (E) to obtain a toothed blade root tenon groove (G).

8. The method for machining the main shaft blade root tenon-groove tooth profile according to claim 7, characterized in that: The step 1 is specifically performed according to the following steps: Step 1.1, setting the straight groove (B) on the workpiece to be processed, specifically comprising: A tool setting block (H) is placed at the bottom of the straight groove (B) on the workpiece to be processed; Insert the bottom arc processing tool (A) into the straight groove (B) on the workpiece to be processed and press the tool setting block (H) to complete the radial position determination of the tool; On the basis of the radial position of the tool being determined, the bottom arc processing tool (A) is placed close to the side of the straight groove (B) on the processing part to complete the axial position of the tool; Step 1.2: After tool alignment is completed, use a bottom arc processing tool (A) to perform bottom arc rough processing on the side of the straight groove (B) to obtain a bottom arc blade root tenon groove (C).

9. The method for machining the main shaft blade root tenon-groove tooth profile according to claim 7, characterized in that: Step 2 is performed as follows: Step 2.1, selecting the size of a rough tooth processing tool (D) according to the shape and size of the toothed blade root tenon groove to obtain a toothed tool; Step 2.2, using a tool setting block (H) to set the toothed tool in the bottom arc blade root groove; Step 2.3: After the tool setting is completed, a toothed tool is used to perform rough tooth processing on the side surface of the bottom arc blade root tenon groove (C) to obtain a rough toothed blade root tenon groove (E).

Images