A CNC machining method for rounding the teeth of cylindrical gears

Abstract

The present application discloses a CNC machining method for chamfering the tooth portion (tooth profile and tooth top edge) of a cylindrical gear. The method comprises the following steps: part installation, automatic alignment, form-fitting compensation, automatic tool setting, three-tool milling of the tooth portion, and polishing. The present invention decomposes the tooth chamfered portion into at least three straight segments of equal length, each of which is tangent to the theoretical chamfer. Each straight segment is milled and then polished in sequence. The CNC machining of the tooth profile and tooth top edge chamfering of a cylindrical gear is achieved by utilizing the CNC machine tool's five-axis linkage, on-machine detection, on-machine compensation, and automatic tool changing functions, thereby improving part surface quality, product consistency, and production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of gear processing, and in particular to a numerical control processing method, system and medium for rounding the teeth of cylindrical gears. Background Art

[0002] Aviation gears have the characteristics of high speed, high precision and high surface quality, and they have rounding requirements for the sharp edges of the teeth, such as Figure 1 As shown in the figure, the intersection line of the teeth after hobbing or grinding / honing is a sharp edge, which causes stress concentration and affects the use of the parts. Therefore, it is required to round the tooth profile and tooth top edges of the gear.

[0003] When the filleting requirement is ≤R0.1 mm, deburring method can be used to ensure it; when the filleting requirement is ≥R1 mm, forming tool processing can be used; when the filleting requirement of the sharp edge of the existing gear tooth is between R0.1mm and R1mm, due to the difficulty in making forming tools and serious tool deflection during processing, the current filleting of the tooth profile and tooth top edge is difficult and cannot be directly processed by forming tools or deburring method. Manual processing is mainly used, but the filleting consistency and filleting quality are poor. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and provide a CNC machining method for chamfering the teeth of cylindrical gears, so that the tooth profile and tooth top edges of the gear can meet the chamfering requirements, and the chamfering consistency and efficiency can be improved, thereby improving quality and efficiency.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A numerical control machining method for rounding the teeth of a cylindrical gear comprises the following steps:

[0007] A1. Parts installation: The cylindrical gear parts to be processed are installed on a CNC machine tool with on-machine detection, on-machine tool setting, automatic alignment, and automatic compensation functions.

[0008] A2, automatic alignment: Based on the theoretical model, on-machine inspection is performed to establish a workpiece coordinate system, in which the tooth tip circle is centered, the tooth end face is horizontally aligned, and the tooth face is angularly oriented in the diameter or chord length direction. The part is then aligned using the workpiece axis.

[0009] A3, Conformal Compensation: Based on the gear profile of the theoretical model, on-machine detection is performed to obtain the tooth profile of the cylindrical gear part to be processed, and on-machine compensation is performed to automatically correct the tool path of the CNC machine tool;

[0010] A4, milling: decompose the tooth chamfered area (tooth profile and tooth top edge) into at least three straight line segments of equal length. The straight line segments are tangent to the theoretical chamfered circle, and each straight line segment is milled in turn.

[0011] A5, Polishing: Polish the intersecting edges of each straight line segment, the intersecting edges of the straight line segment and the tooth end face, and the intersecting edges of the straight line segment and the tooth surface respectively. Use high-speed forward and reverse polishing to remove the sharp edge allowance to obtain the cylindrical gear parts with rounded teeth.

[0012] As a further improvement of the above technical solution: in step A4, the rounded portion of the tooth is decomposed into three straight line segments, and each straight line segment is chamfered and milled using a different chamfering cutter.

[0013] As a further improvement of the above technical solution: in step A4, the chamfering tool is a tapered flat-bottom tool, and the tapers of the tapered flat-bottom tools used for milling the three straight segments are 135°, 90° and 45° respectively.

[0014] As a further improvement of the above technical solution: in step A4, the tapered flat-bottomed tool is a carbide coated tool.

[0015] As a further improvement of the above technical solution: in step A4, the lengths of the three straight line segments are the same.

[0016] As a further improvement of the above technical solution: the three straight line segments are obtained by the following steps: C1, on the plane perpendicular to the chamfered part of the tooth, draw a chamfer R at the projection of the chamfered part of the gear according to the requirements of ideal chamfering; C2, connect the intersection A of the center O of the chamfer R and the extension lines of the two sides of the chamfered part of the gear, and the OA line and the outer circumference of the chamfer R intersect at the intersection D; C3, make a tangent to the chamfer R through the intersection D, and intersect with the two sides of the gear chamfered part at the intersection B and C, connect OB and OC and intersect the outer circumference of the chamfer R at the intersection E and F; C4, make tangents to the chamfer R through the intersection E and F respectively, and obtain three intersecting straight line segments as three chamfered edges.

[0017] As a further improvement of the above technical solution: before the milling process in step A4, the automatic tool setting function of the CNC machine tool equipment is used to set the tool before the milling process is performed.

[0018] As a further improvement of the above technical solution: Step A3 includes the following steps:

[0019] B1. Measure the actual tooth profile: Utilize the curve compensation function of the CNC machine tool's on-machine detection function to measure the error between the gear profile of the cylindrical gear to be machined and the gear profile of the theoretical model, and determine the deviation from the profile compensation.

[0020] B2. Create compensation to generate actual tool path: The CNC machine tool equipment automatically changes the processing path according to the deviation calculated by the conformal compensation change amount to perform conformal processing.

[0021] As a further improvement of the above technical solution: the on-machine detection in step A2 includes the following steps: sampling points or scanning and tracking the tooth profile of the cylindrical gear part to be processed, and when sampling points, the number of sampling points is required to be increased in areas with smaller curvature radius.

[0022] Belonging to the same inventive concept, the present invention also discloses a CNC machining system for rounding the teeth of cylindrical gears, comprising the following modules:

[0023] A parts installation module is used to install the cylindrical gear parts to be processed on a CNC machine tool. The CNC machine tool has the functions of on-machine detection, on-machine tool setting, automatic alignment, and automatic compensation.

[0024] The automatic alignment module establishes a workpiece coordinate system through on-machine detection based on a theoretical model, wherein the tooth tip circle is centered, the tooth end face is horizontally aligned, and the tooth face is angularly aligned in the diameter or chord length direction. Then, the cylindrical gear part to be machined is aligned using the workpiece axis.

[0025] The conformal compensation module performs on-machine detection based on the gear profile of the theoretical model to obtain the tooth profile of the cylindrical gear part to be processed, and performs on-machine compensation to automatically correct the tool path of the CNC machine tool equipment;

[0026] A milling processing module is used to decompose the tooth chamfered area into at least three straight line segments, each of which is tangent to the ideal chamfer, and to perform milling processing on each straight line segment in sequence;

[0027] The polishing module is used to polish the intersection edges of each straight line segment, the intersection edges of the straight line segment and the tooth end face, and the intersection edges of the straight line segment and the tooth surface. High-speed forward and reverse polishing is used to remove the sharp edge allowance to obtain cylindrical gear parts with rounded teeth.

[0028] Belonging to the same inventive concept, the present invention further discloses a computer-readable storage medium, which stores a computer program programmed or configured to execute the above-mentioned numerical control machining method.

[0029] Compared with the prior art, the advantages of the present invention are:

[0030] The present invention discloses a numerical control machining method and system for chamfering the tooth portion of a cylindrical gear. The method decomposes the tooth chamfered portion into at least three straight line segments, each of which is tangent to the theoretical chamfer. Each straight line segment is sequentially milled and then polished. The numerical control machining method utilizes the functions of a numerical control machine tool, such as part alignment, on-machine detection, automatic compensation, and automatic tool change, to achieve numerical control machining of the tooth profile and tooth top edge chamfering of the cylindrical gear. This improves part surface quality, product consistency, and production efficiency, thereby freeing up labor and eliminating reliance on experience. The present invention has the characteristics of simple and feasible principles, easy and practical operation, and the advantages of easy and practical operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural diagram of the tooth fillet area of ​​a typical gear part to be processed.

[0032] Figure 2 It is a structural schematic diagram of the chamfering cutter of the present invention.

[0033] Figure 3 It is a schematic diagram of three-dimensional equilateral chamfering of a vertical surface according to the present invention.

[0034] Figure 4 It is a schematic diagram of the three-dimensional chamfering of the non-vertical surface of the present invention.

[0035] Figure 5 2 is a schematic structural diagram of a chamfering cutter according to embodiment 1 of the present invention.

[0036] Figure 6 It is a schematic diagram of the structure of the vertical surface of the tooth portion after three-times external equilateral chamfering of the tooth portion.

[0037] Figure 7 It is a schematic diagram of the structure of the vertical surface of the tooth portion after polishing of the present invention.

[0038] The numbers in the figure represent: 1, the first straight line segment; 2, the second straight line segment; 3, the third straight line segment. DETAILED DESCRIPTION

[0039] The present invention will be described in further detail below. Unless otherwise specified, the instruments and materials used in the present invention are commercially available.

[0040] In the description of this application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0042] In this application, unless otherwise specified or limited, the terms "assemble," "connect," "connect," "fix," and the like should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0043] In the numerical control machining method for cylindrical gear tooth rounding of this embodiment, the cylindrical gear tooth rounding to be machined has a module m = 3 mm, a pressure angle α = 20°, a number of teeth Z = 31, a tooth root R = 1.2 ± 0.2 mm, and a tooth rounding requirement of R0.4 ± 0.1 mm;

[0044] A numerical control machining method for rounding the teeth of a cylindrical gear according to this embodiment includes the following steps:

[0045] (1) Parts installation: The cylindrical gear parts to be processed are installed on the CNC machine tool. The CNC machine tool is equipped with the functions of on-machine detection, on-machine tool setting and automatic alignment;

[0046] In this embodiment, the installation method can adopt the gear hobbing or gear grinding clamping method, or directly adopt the three-jaw open plate clamping method to complete the support, positioning and fixation of the parts.

[0047] (2) Automatic alignment: Align the cylindrical gear parts to be processed;

[0048] In this embodiment, the automatic alignment function of the CNC machine tool is used, wherein the tooth top circle is centered, the tooth end face is aligned horizontally, and the tooth face is angularly oriented in the diameter or chord length direction, and the part is aligned with the help of the workpiece axis.

[0049] (3) Conformal compensation: Determine the cutting path of the CNC machine tool based on the gear profile of the cylindrical gear part to be processed and the gear profile of the theoretical model.

[0050] In this embodiment, the conformal compensation step specifically includes the following steps:

[0051] B1. Measure the actual tooth profile: call the curve compensation function of the on-machine detection function of the CNC machine tool equipment, measure the error between the gear profile of the cylindrical gear part to be processed and the gear profile of the theoretical model, and determine the change in conformal compensation.

[0052] B2. Create Compensated Tool Path and Generate the Actual Toolpath: The CNC machine tool automatically changes the machining path based on the deviation calculated from the conformal compensation variation, performing conformal machining. Because the theoretical model's tooth profile is smaller than the actual tooth profile of the cylindrical gear being machined, the actual cutting amount is less than expected. Therefore, in this embodiment, a compensating machining path is created to compensate the machining path to the actual curve during machining.

[0053] In other embodiments, the conformal compensation step specifically includes the following steps during machine detection: sampling points or scanning and tracking the tooth profile of the cylindrical gear part to be processed, and when sampling points, the number of sampling points is required to be increased in areas with smaller curvature radius.

[0054] (4) Milling: Decompose the tooth chamfered area (tooth profile and tooth top edge) into at least three straight line segments of equal length. Each straight line segment is tangent to the ideal chamfer, and perform chamfer milling on each straight line segment in turn.

[0055] In this embodiment, before chamfer milling, the three straight line segments of the tooth chamfered area are determined (the tooth chamfered area is broken down into three straight line segments). Then, a CNC machine tool is used to mill each straight line segment using three different chamfering cutters. Based on the "three-cut method" for part chamfering, the cylindrical gear tooth profile and tooth top edge are chamfered using three external equal-edge chamfers / three external chamfers for non-vertical surfaces, plus polishing.

[0056] In this embodiment, the automatic tool setting function of the CNC machine tool equipment is used to realize automatic tool setting of three chamfering cutters, and the tool setting error is required to be ≤0.005mm (the smaller the error, the higher the processing accuracy).

[0057] In this embodiment, the chamfering tool is a tapered flat-bottom carbide coated tool, and the tapers of the tapered flat-bottom tools used for milling the three straight segments are 135°, 90° and 45° respectively. Figure 2 、 5 The chamfering cutter shown, wherein Figure 2 (a) (or Figure 5 (a)), Figure 2 (b) (or Figure 5 (b)), Figure 2 (c) (or Figure 5 (c) The taper angles α of the taper flat bottom cutter are 135°, 90° and 45° respectively. Figure 2 Where S = (Dd) × cosα, is the coating height, D = Φ4 mm, d = Φ0.1 mm, and L = 30 mm.

[0058] In this embodiment, the three straight line segments ( Figure 3 、 4 The lengths of the first straight line segment 1, the second straight line segment 2, and the third straight line segment 3 are the same.

[0059] In view of the fact that the lengths of the three straight segments are unlikely to be exactly the same in actual production, in other embodiments, the three straight segments after milling ( Figure 3 、 4 The lengths of the first straight line segment 1, the second straight line segment 2, and the third straight line segment 3 are different, but the milling time of the three straight line segments is the same. In some embodiments, the milling time of the three straight line segments is controlled to be about 3 minutes, so that the total tooth profile processing time (including tool change time) is about 10 minutes.

[0060] In this embodiment, Figure 3 The figure in the middle is a schematic diagram of the triple circumscribed equilateral chamfer of a vertical surface (such as the tooth profile edge). Point H is the intersection point of the first straight line segment 1 and one side of the gear chamfered part, point I is the intersection point of the first straight line segment 1 and the second straight line segment 1, point J is the intersection point of the second straight line segment 2 and the third straight line segment 3, point K is the intersection point of the third straight line segment 3 and the other side of the gear chamfered part, H, I, J, and K are inflection points, the angle between the tangent line of the first straight line segment 1 and the ideal chamfer R and the projection line of one side of the gear chamfered part is 67°30', the angle between the tangent line of the second straight line segment 2 and the ideal chamfer R and the projection line of the tooth surface is 45°, and the angle between the tangent line of the third straight line segment 3 and the ideal chamfer R and the projection line of the tooth surface is 22°30'.

[0061] Figure 4 (a) is a schematic diagram of the triple external chamfering of a non-vertical surface (referring to the tooth top edge or non-vertical surface of a helical gear). The specific steps of triple external chamfering are as follows:

[0062] Step 1: On a plane perpendicular to the gear chamfered part, make chamfer R (ideal chamfer) at the projection of the gear chamfered part according to the ideal chamfering requirements;

[0063] Step 2: Connect the intersection point A of the center O of the fillet R and the extension lines of the two sides of the fillet part of the gear. OA intersects the outer circumference of the fillet R to obtain the intersection point D. Draw a tangent line of the fillet R through point D, intersecting the intersection points B and C of the extension lines of the two sides of the fillet part of the gear. Connect OB and OC and intersect the outer circumference of the fillet R at the intersection points E and F.

[0064] Step 3: Similarly, draw tangent lines of the fillet R through points E and F to obtain three intersecting straight line segments as the three chamfered edges, as shown in the following example: Figure 4 (b)

[0065] In this embodiment, the schematic diagram of the structure of the rounded portion of the gear after milling is as follows: Figure 6As shown, the Y surface is the tooth end surface, the X surface is the tooth surface, and the chamfered part of the gear forms three straight line segments.

[0066] (5) Polishing: Polish the intersection of each straight line segment ( Figure 2 The intersection of I, J), the straight line segment and the tooth end surface Y ( Figure 2 H), the intersection of the straight line segment and the tooth surface X ( Figure 2 Polishing is performed in the middle K), and the sharp edge allowance is removed by high-speed forward and reverse polishing to obtain a cylindrical gear part with rounded teeth.

[0067] In this embodiment, the degree of polishing is based on the ideal rounding R.

[0068] After testing and polishing the teeth of the parts, the structural diagram of the rounded part of the gear is obtained as follows Figure 7 As shown in the figure, the fillet radius is R0.404 mm, and the actual processing error is 1%, which meets the processing accuracy requirement (R0.1~R1 mm).

[0069] The present invention also discloses a numerical control machining system for rounding the teeth of cylindrical gears, comprising the following modules:

[0070] A parts installation module is used to install the cylindrical gear parts to be processed on a CNC machine tool. The CNC machine tool has the functions of on-machine detection, on-machine tool setting, automatic alignment, and automatic compensation.

[0071] The automatic alignment module is used to establish the workpiece coordinate system for on-machine inspection based on the theoretical model, in which the tooth tip circle is centered, the tooth end face is horizontally aligned, and the tooth face is angularly aligned in the diameter or chord length direction. The cylindrical gear part to be machined is then aligned using the workpiece axis;

[0072] The conformal compensation module is used to perform on-machine detection based on the gear profile of the theoretical model to obtain the tooth profile of the cylindrical gear part to be processed, and perform on-machine compensation to automatically correct the tool path of the CNC machine tool equipment;

[0073] A milling processing module is used to decompose the tooth chamfered area into at least three straight line segments, each of which is tangent to the ideal chamfer, and to perform milling processing on each straight line segment in sequence;

[0074] The polishing module is used to polish the intersection edges of each straight line segment, the intersection edges of the straight line segment and the tooth end face, and the intersection edges of the straight line segment and the tooth surface. High-speed forward and reverse polishing is used to remove the sharp edge allowance to obtain cylindrical gear parts with rounded teeth.

[0075] Belonging to the same inventive concept, the present invention further discloses a computer-readable storage medium, which stores a computer program programmed or configured to execute the above-mentioned numerical control machining method.

[0076] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-readable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code. The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of processes and / or boxes in the flowchart and / or block diagram, may be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the functions described in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing device to work in a specific way, so that the instructions stored in the computer-readable memory produce a product including the instruction device, which implements the function specified in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0077] Although the present invention has been disclosed above with reference to preferred embodiments, this is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, utilize the technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the scope of protection of the technical solution of the present invention.

Claims

1. A CNC machining method for rounding the teeth of cylindrical gears, characterized in that: The following steps are involved: A1. Parts installation: The cylindrical gear parts to be processed are installed on a CNC machine tool with on-machine detection, on-machine tool setting, automatic alignment, and automatic compensation functions. A2, automatic alignment: Based on the theoretical model, on-machine detection is performed to establish the workpiece coordinate system, center the tooth tip circle, align the tooth end face horizontally, and determine the angular orientation of the tooth face in the diameter or chord length direction. The cylindrical gear part to be machined is aligned using the workpiece axis. A3, Conformal Compensation: Based on the gear profile of the theoretical model, the gear profile of the cylindrical gear part to be processed is detected on the machine, and compensation is performed on the machine to automatically correct the tool path of the CNC machine tool; A4, milling: decompose the tooth chamfer area into at least three straight segments of equal length. The straight segments are tangent to the theoretical chamfer, and chamfer milling is performed on each straight segment in turn. A5, Polishing: Polish the intersecting edges of each straight line segment, the intersecting edges of the straight line segment and the tooth end face, and the intersecting edges of the straight line segment and the tooth face to obtain cylindrical gear parts with rounded teeth.

2. The numerical control machining method according to claim 1, characterized in that: In step A4, the rounded portion of the tooth is decomposed into three straight line segments, and each straight line segment is chamfered and milled using a different chamfering cutter.

3. The numerical control machining method according to claim 2, characterized in that: In step A4, the chamfering cutter is a tapered milling cutter, and the tapers of the chamfering cutters used for milling the three straight segments are 135°, 90°, and 45° respectively.

4. The numerical control machining method according to claim 3, characterized in that: In step A4, the chamfering tool is a carbide coated tool.

5. The numerical control machining method according to claim 3, characterized in that: In step A4, the three straight line segments have the same length.

6. The numerical control machining method according to claim 3, characterized in that: In step A4, the three straight line segments are obtained by the following steps: C1, on the plane perpendicular to the chamfered part of the tooth, project the chamfer R on the chamfered part of the gear according to the requirements of the ideal chamfer; C2, the intersection point A connecting the center O of the fillet R and the extension lines of both sides of the fillet part of the gear, the OA line and the outer circumference of the fillet R intersect at the intersection point D; C3, draw a tangent line of fillet R through intersection D, intersecting the two sides of the fillet at intersections B and C, connecting OB and OC and intersecting the outer circumference of fillet R at intersections E and F; C4, draw tangents of the chamfer R through the intersection points E and F respectively, and obtain three intersecting straight line segments as the three chamfer edges.

7. The numerical control machining method according to any one of claims 1 to 6, characterized in that: Step A3 The following steps are involved: B1. Measure the actual tooth profile: Utilize the curve compensation function of the CNC machine tool's on-machine detection function to measure the error between the gear profile of the cylindrical gear to be machined and the gear profile of the theoretical model, and determine the deviation from the profile compensation. B2. Create compensation to generate actual tool path: The CNC machine tool equipment automatically changes the processing path according to the deviation calculated by the conformal compensation change amount to perform conformal processing.

8. The numerical control machining method according to any one of claims 1 to 6, characterized in that: The on-machine detection in the conformal compensation step includes the following steps: sampling points or scanning and tracking the tooth profile of the cylindrical gear part to be processed, and when sampling points, the number of sampling points is required to be increased in the area with a smaller curvature radius.

9. A CNC machining system for rounding the teeth of cylindrical gears, characterized in that: Includes the following modules: A parts installation module is used to install the cylindrical gear parts to be processed on a CNC machine tool. The CNC machine tool has the functions of on-machine detection, on-machine tool setting, automatic alignment, and automatic compensation. The automatic alignment module establishes a workpiece coordinate system through on-machine detection based on a theoretical model, centers the tooth tip circle, aligns the tooth end face horizontally, and determines the tooth face angle in the diameter or chord length direction. The cylindrical gear part to be machined is aligned with the workpiece axis. The conformal compensation module performs on-machine detection based on the gear profile of the theoretical model to obtain the tooth profile of the cylindrical gear part to be processed, and performs on-machine compensation to automatically correct the tool path of the CNC machine tool equipment; A milling processing module is used to decompose the tooth chamfered area into at least three straight line segments, each of which is tangent to the ideal chamfer, and to perform milling processing on each straight line segment in sequence; The polishing module is used to polish the intersection edges of each straight line segment, the intersection edges of the straight line segment and the tooth end face, and the intersection edges of the straight line segment and the tooth face to obtain a cylindrical gear part with rounded teeth.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program programmed or configured to execute the numerical control machining method according to any one of claims 1 to 8.

Images