A face gear tooth surface modification grinding method based on a dish-shaped grinding wheel

Abstract

The present application relates to gear machining technical field, specifically to a kind of face gear tooth surface modification grinding machining method based on dish-shaped grinding wheel, determine face gear parameters, calculate the minimum inner radius of face gear, maximum outer radius, face gear tooth bottom coordinate and face gear tooth top coordinate;Face gear tooth surface is discrete, and the discrete tooth surface point coordinates of face gear are obtained;Determine modification parameter, calculate the modification amount size of each point of face gear;The modification amount size of each point of face gear is combined with the discrete tooth surface point coordinates of face gear, and the modification amount size corresponding to each discrete tooth surface point of face gear is obtained;Conversion is required Machine tool each axis movement compensation amount of each tooth surface point in linkage processing, determine grinding parameter, obtain face gear grinding linkage processing code;Calculate the machine tool each axis movement compensation amount required to be added in each row of processing code, obtain face gear tooth surface modification grinding machining code;Import machine tool, realize the tooth surface modification grinding machining of face gear, the face gear transmission of this method processing is stable, avoids edge contact problem.

Description

Technical Field

[0001] This invention relates to the field of gear processing technology, and in particular to a method for profile grinding of face gear teeth based on a disc-shaped grinding wheel. Background Technology

[0002] Face gear transmission is a new type of gear transmission. Compared with spiral bevel gear transmission, face gear transmission has advantages such as small size, light weight, low noise, high interchangeability, and strong load-bearing capacity. Internationally, face gear transmission has been applied to the transmission systems of helicopters, Audi car center differentials, reducers, and high-end machine tools, achieving good results.

[0003] Face gear profile modification is an important process in face gear manufacturing. Traditional unmodified face gears often experience edge contact in practical applications, leading to stress concentration in the meshing of the teeth, accelerating tooth fatigue damage, affecting the transmission performance of the face gear, and failing to meet the requirements of the transmission system for smooth face gear transmission and long service life. Summary of the Invention

[0004] The purpose of this invention is to provide a face gear tooth surface profile grinding method based on a disc-shaped grinding wheel, which aims to solve the edge contact problem that occurs in the practical application of face gears.

[0005] To achieve the above objectives, the present invention provides a method for profile grinding of face gear teeth based on a disc-shaped grinding wheel, comprising the following steps:

[0006] Determine the parameters of the face gear, and calculate the minimum inner radius, maximum outer radius, tooth root coordinates, and tooth tip coordinates of the face gear;

[0007] Discretize the tooth surface of the face gear based on the face gear radius and grinding wheel rotation angle to obtain the coordinates of discrete tooth surface points of the face gear.

[0008] Determine the modification parameters and calculate the modification amount at each point of the face gear;

[0009] The magnitude of the profile modification at each point of the face gear is combined with the coordinates of the discrete tooth surface points of the face gear, and the two are combined into an array. The size of the profile modification amount corresponding to each discrete tooth surface point of the gear is obtained;

[0010] Calculate the required machine tool axis motion compensation for each tooth surface point during linkage machining, determine the grinding parameters, and obtain the linkage machining code for face gear grinding;

[0011] Based on the face gear grinding linkage machining code, the array is queried, and the amount of machine tool axis motion compensation to be added for each row of machining code is calculated to obtain the face gear tooth surface modification grinding machining code;

[0012] The face gear tooth surface modification grinding code is imported into the machine tool, the face gear workpiece and grinding wheel are clamped and the tool is set, the machining program is run, and the face gear tooth surface modification grinding is realized.

[0013] The parameters of the face gear include, but are not limited to, module, number of teeth, transmission ratio, pressure angle, tooth height coefficient, and displacement coefficient.

[0014] The shaping parameters include, but are not limited to, the contact trace slope and the shaping curve equation parameters.

[0015] Each row of the array contains the shaping information of discrete tooth surface points of a face gear.

[0016] The grinding parameters include machine tool structural parameters, grinding wheel parameters, and face gear parameters.

[0017] This invention discloses a face gear tooth surface modification grinding method based on a disc-shaped grinding wheel. The method involves determining the face gear parameters and calculating the minimum inner radius, maximum outer radius, tooth root coordinates, and tooth tip coordinates; discretizing the face gear tooth surface based on the face gear radius and grinding wheel rotation angle to obtain discrete tooth surface point coordinates; determining modification parameters and calculating the modification amount at each point of the face gear; and combining the modification amount at each point of the face gear with the discrete tooth surface point coordinates to form an array. The method involves obtaining the profile modification amount corresponding to each discrete tooth surface point of the face gear; calculating the required machine tool axis motion compensation amount for each tooth surface point during linkage machining, determining the grinding parameters, and obtaining the face gear grinding linkage machining code; based on the face gear grinding linkage machining code, querying the array, calculating the required machine tool axis motion compensation amount for each row of machining code, and obtaining the face gear tooth surface profile modification grinding machining code; importing the face gear tooth surface modification grinding machining code into the machine tool, completing the clamping and tool setting of the face gear workpiece and grinding wheel, running the machining program, and realizing the face gear tooth surface modification grinding machining. This method is based on a dedicated face gear grinding machining program and compensates for the motion of each axis of the machine tool through calculation. This method enables machining control of different modification amounts on various tooth surfaces of face gears. The face gears machined using this method have smooth transmission and can significantly avoid edge contact problems. This method is a functional upgrade of the original face gear grinding method without changing the original machine tool structure. It can achieve face gear modification machining with different modification parameters (contact trace slope, modification curve equation parameters, etc.), and can obtain face gears with different contact traces. There are no situations where the design result cannot be machined. The face gear modification grinding machining method provided by this method realizes the actual adjustable contact trace of the face gear tooth surface, providing a good solution for optimizing the transmission performance of face gears and solving the edge contact problem that occurs in the practical application of face gears. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, 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 effort.

[0019] Figure 1 This is a flowchart of a face gear tooth surface modification grinding method based on a disc-shaped grinding wheel provided by the present invention. Detailed Implementation

[0020] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0021] Please see Figure 1 This invention provides a method for profile grinding of face gear teeth based on a disc-shaped grinding wheel, comprising the following steps:

[0022] S1 determines the parameters of the face gear and calculates the minimum inner radius, maximum outer radius, tooth root coordinate, and tooth tip coordinate of the face gear;

[0023] In this embodiment of the invention, the basic parameters of the face gear are determined according to design requirements, namely, the face gear parameters, including module, number of teeth, transmission ratio, pressure angle, tooth height coefficient, and displacement coefficient. Based on the face gear parameters, the minimum inner radius of the face gear is calculated. Maximum outer radius Tooth root coordinates Tooth tip coordinates These calculations form the basis for subsequent steps, ensuring that the basic dimensions and shape of the face gear meet design requirements.

[0024] S2 discretizes the tooth surface of the face gear based on the face gear radius and the grinding wheel rotation angle to obtain the coordinates of the discrete tooth surface points of the face gear.

[0025] In this embodiment of the invention, the tooth surface of the face gear is arranged according to the radius. and grinding wheel angle Discretization is performed to obtain the coordinates of a series of discrete tooth surface points. This step is to transform the continuous tooth surface into a processable discrete set of points, which facilitates subsequent profile design and machining control.

[0026] S3 determines the modification parameters and calculates the modification amount at each point of the face gear;

[0027] In this embodiment of the invention, the modification parameters, such as the contact track slope, are determined based on the transmission characteristics and modification requirements of the face gear. The parameters of the profile modification curve equation, etc., are used to calculate the profile modification amount at each discrete point of the face gear. The goal of profile modification design is to optimize tooth surface contact, reduce vibration during engagement and disengagement, and avoid edge contact.

[0028] S4 combines the magnitude of the profile modification at each point of the face gear with the coordinates of the discrete tooth surface points of the face gear, and forms an array from the two. The size of the profile modification amount corresponding to each discrete tooth surface point of the gear is obtained;

[0029] In this embodiment of the invention, the calculated modification amount at each point of the face gear is... Coordinates of the discrete tooth surface points of the face gear Combine to form an array This array contains the profile modification information for each discrete tooth surface point, which is crucial data for subsequent machining control.

[0030] S5 calculates the required machine tool axis motion compensation for each tooth surface point during linkage machining, determines the grinding parameters, and obtains the linkage machining code for face gear grinding.

[0031] In this embodiment of the invention, since the machine tool coordinate system and the face gear coordinate system are different, it is necessary to adjust the profile amount. Converted to motion compensation for each axis of the machine tool Based on coordinate system transformation relationships, there are usually... Determine the grinding parameters, including machine tool structural parameters (spindle rotation radius). Grinding wheel parameters (grinding wheel radius) Virtual gear cutter tooth tip circle radius ) and face gear parameters (transmission ratio) Minimum inner radius of face gear Maximum outer radius Based on machine tool structural parameters, grinding wheel parameters, and face gear parameters, the system generates simultaneous machining code for face gear grinding. Each line of code corresponds to a different face gear radius. and grinding wheel angle .

[0032] S6, based on the face gear grinding linkage machining code, queries the array, calculates the amount of machine tool axis motion compensation to be added for each row of machining code, and obtains the face gear tooth surface modification grinding machining code;

[0033] In this embodiment of the invention, each line of the face gear grinding linkage machining code corresponds to a different face gear radius. and grinding wheel angle By querying the array The motion compensation amount of each machine tool axis required to be added for each line of machining codes can be calculated , and the face gear tooth surface modification grinding machining codes are obtained.

[0034] S7: import the face gear tooth surface modification grinding machining codes into the machine tool, complete the clamping and tool setting of the face gear workpiece and the grinding wheel, and run the machining program to realize the tooth surface modification grinding of the face gear.

[0035] In the embodiment of the present invention, the finally obtained face gear tooth surface modification grinding machining codes are imported into the numerical control machine tool, and the clamping and tool setting of the face gear workpiece and the grinding wheel are completed. The machining program is run, and each axis of the machine tool performs linkage machining according to the predetermined motion trajectory and compensation amount, so as to realize the tooth surface modification grinding of the face gear.

[0036] After the machining is completed, the face gear is inspected to evaluate the modification effect. If necessary, the modification parameters or machining strategies are adjusted according to the inspection results for iterative optimization until the optimal transmission performance and surface quality are achieved.

[0037] This method takes the center of the tooth surface as the reference point, draws the contact trace of the face gear, and formulates the modification function along the contact trace. This method can accurately calculate the modification amount at each point of the face gear, reduce the vibration of the face gear during meshing-in and meshing-out, and effectively avoid the edge contact phenomenon; this method calculates the modification amount at each point of the face gear, and converts it to obtain the motion compensation amount of each machine tool axis required for grinding each point of the face gear. This conversion method ensures that the modification amount can be accurately reflected in the motion control of the machine tool, so as to realize the precise grinding machining with different modification amounts at each point of the face gear; the dish-shaped grinding wheel is used to simulate the rotation of the spur gear to perform linkage machining with the face gear workpiece. Through the linkage of the X, Y, Z, A and B axes of the machine tool, the continuous generating grinding of the face gear tooth profile is realized. This linkage machining mode ensures the machining accuracy; the face gear tooth surface is discretized according to the face gear radius and the rotation angle of the grinding wheel, so as to obtain the coordinates of the discrete tooth surface points of the face gear. This discretization processing provides basic data for subsequent modification design and machine tool motion compensation.

[0038] The above only discloses a preferred embodiment of the method for grinding and modifying the tooth surface of a face gear based on a dish-shaped grinding wheel according to the present invention, which certainly is not intended to limit the scope of the claims of the present invention. A person of ordinary skill in the art may understand that all or part of the processes for implementing the above embodiments, and equivalent changes made according to the claims of the present invention, shall still fall within the scope covered by the present invention.

Claims

1. A method for profile grinding of face gear teeth based on a disc-shaped grinding wheel, characterized in that, Includes the following steps: Determine the parameters of the face gear, and calculate the minimum inner radius, maximum outer radius, tooth root coordinates, and tooth tip coordinates of the face gear; Discretize the tooth surface of the face gear based on the face gear radius and grinding wheel rotation angle to obtain the coordinates of discrete tooth surface points of the face gear. Determine the modification parameters and calculate the modification amount at each point of the face gear; The magnitude of the profile modification at each point of the face gear is combined with the coordinates of the discrete tooth surface points of the face gear, and the two are combined into an array. The size of the profile modification amount corresponding to each discrete tooth surface point of the gear is obtained; Calculate the required machine tool axis motion compensation for each tooth surface point during linkage machining, determine the grinding parameters, and obtain the linkage machining code for face gear grinding; Based on the face gear grinding linkage machining code, the array is queried, and the amount of machine tool axis motion compensation to be added for each row of machining code is calculated to obtain the face gear tooth surface modification grinding machining code; The face gear tooth surface modification grinding code is imported into the machine tool, the face gear workpiece and grinding wheel are clamped and the tool is set, the machining program is run, and the face gear tooth surface modification grinding is realized.

2. The method for surface gear tooth profile modification grinding based on a disc-shaped grinding wheel as described in claim 1, Its characteristics are: The parameters of the face gear include, but are not limited to, module, number of teeth, transmission ratio, pressure angle, tooth height coefficient, and displacement coefficient.

3. The method for face gear tooth surface profile grinding based on a disc-shaped grinding wheel as described in claim 1, characterized in that... ； The shaping parameters include, but are not limited to, the contact trace slope and the shaping curve equation parameters.

4. The method for face gear tooth surface modification grinding based on a disc-shaped grinding wheel as described in claim 1, characterized in that... ； Each row of the array contains the shaping information of discrete tooth surface points of a faceted gear.

5. The method for face gear tooth surface modification grinding based on a disc-shaped grinding wheel as described in claim 1, characterized in that... ； The grinding parameters include machine tool structural parameters, grinding wheel parameters, and face gear parameters.

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