Odd-number end face tooth axis detection method, detection equipment and readable storage medium

Abstract

The invention relates to the technical field of part detection, in particular to an odd-number end face tooth axis detection method and detection equipment and a readable storage medium, and the odd-number end face tooth axis detection method comprises the steps: selecting a tooth groove as a first tooth groove based on a basic coordinate system; selecting the tooth sockets which are separated from the first tooth socket by a first set value and a second set value as a second tooth socket and a third tooth socket, and driving the detection probe to obtain a corresponding second coordinate point and a corresponding third coordinate point based on the center distance of the tooth sockets; selecting a fourth tooth space, a fifth tooth space and a sixth tooth space which are arranged at set distances relative to the first tooth space, the second tooth space and the third tooth space, and detecting coordinate points; connecting the coordinate points in one-to-one correspondence; obtaining a triangle formed by connecting line projection, calculating the center of an inscribed circle in the triangle based on the triangle, and obtaining a correction axis based on the center position. Therefore, the problem of large deviation of the existing detection method of the odd-number end face tooth axis is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of parts detection, and in particular to a method, a detection device and a readable storage medium for detecting the axis of an odd-numbered end face tooth. Background Art

[0002] Modern automobile transmission components often feature face gears, depending on design requirements. These gears are located on one end of the component and are categorized as odd or even based on the number of teeth. During the production process, these parts require tooth pitch inspection to verify product conformity. This inspection process involves measuring the gear axis.

[0003] The axis position can usually be inspected using three-coordinate inspection equipment. Among them, the method for calibrating the axis for even-numbered teeth is relatively simple. Four self-centering points are made in opposite directions of the center line of the circle, and two points are selected to form a straight line connecting the two points through the center of the circle. The intersection of the two straight lines is the axis. However, the calibration of odd-numbered teeth cannot directly find the axis through the line connection method of even-numbered teeth. Due to the number of teeth, the gear is not centrally symmetrical, and further makes it impossible to select the corresponding teeth of the line passing through the axis. For example, the intersection point or circle center obtained by evenly distributing self-centering points on multiple tooth grooves and fitting with the perpendicular bisector method or the least squares method has a large deviation from the axis of the actual end face teeth. The final detection value of the single tooth pitch and total tooth pitch error of the end face teeth will be relatively large, which cannot provide true feedback on product quality and causes product defects. Summary of the Invention

[0004] In order to solve the problem of large deviation in existing detection methods for the axis center of odd-numbered end face teeth, the present invention provides a detection method, detection equipment and readable storage medium for the axis center of odd-numbered end face teeth.

[0005] One aspect of the present invention provides a method for detecting the axis center of an odd-numbered end face tooth, comprising: detecting an odd-numbered end face tooth part, wherein the odd-numbered end face tooth part comprises a horizontally arranged end face, a center column is provided at the center position of the end face, a plurality of teeth are arranged around the center column, and the number of teeth is odd; the method for detecting the axis center of the odd-numbered end face tooth part comprises: step S1, driving the detection device to establish a basic coordinate system based on the shape of the odd-numbered end face tooth part and the device coordinate system of the detection device, wherein the origin of the basic coordinate system is located at the center position of the end face; step S2, based on the basic coordinate system, selecting a tooth groove in the odd-numbered end face tooth part as a first tooth groove, and detecting a first coordinate point in the basic coordinate system where the center position of the first tooth groove is located, and calculating the tooth groove center distance between the first tooth groove and the coordinate origin based on the first coordinate point; step S3, selecting tooth grooves that are separated from the first tooth groove by a first set value and a second set value as second tooth grooves, and based on the tooth groove center distance, driving the detection probe to obtain the tooth grooves corresponding to the first tooth grooves. The second coordinate point of the second tooth groove, and the third coordinate point corresponding to the third tooth groove; step S4, based on the number of teeth n, respectively select the fourth tooth groove and the sixth tooth groove at a distance of (n-1) / 2 relative to the first tooth groove and the third tooth groove along the same direction, and select the fifth tooth groove at a distance of (n+1) / 2 relative to the second tooth groove, and drive the detection probe to detect the fourth coordinate point, the fifth coordinate point and the sixth coordinate point corresponding to the fourth tooth groove, the fifth tooth groove and the sixth tooth groove respectively based on the tooth groove center distance; step S5, connect the first coordinate point and the fourth coordinate point and obtain the first connecting line, connect the second coordinate point and the fifth coordinate point and obtain the second connecting line, connect the third coordinate point and the sixth coordinate point and obtain the third connecting line; step S6, respectively project the first connecting line, the second connecting line and the third connecting line into the basic coordinate system, and obtain the triangle formed by the projection, calculate the center of the inscribed circle in the triangle based on the triangle, and obtain the correction axis based on the position of the center of the circle.

[0006] In some embodiments, step S8 is also included, based on the correction axis being the z-axis, a correction coordinate system is established with the center position of the circle as the origin of the coordinate system, and steps S2 to S6 are repeated. During the repetition process, the basic coordinate system is replaced by the correction coordinate system to iteratively obtain the correction axis.

[0007] In some embodiments, the step S8 further includes selecting tooth grooves at the same position as the first tooth groove to the sixth tooth groove during the process of repeating the steps S2 to S6.

[0008] In some embodiments, the detection probe includes a needle body extending in a vertical direction and a detection ball arranged at the bottom end of the needle body, and the detection ball can detect and determine the contact state between its outer peripheral surface and the entity; in step S2, it also includes recording the first contact state of the detection ball and the first tooth groove, and in step S3 and step S4, the contact state of the detection ball is consistent with the first contact state.

[0009] In some embodiments, step S1 also includes step S11, driving the detection probe of the detection device to detect the end face plane and the center axis of the center column, where the center axis of the center column is the first axis; step S12, based on the first axis being the z-axis and the end face plane being the xy-axis plane, establishing a basic coordinate system on the end face plane.

[0010] In some embodiments, the step S12 further includes establishing the x-axis and the y-axis based on the extension direction of the horizontal reference axis of the detection device.

[0011] In some embodiments, the central column is a truncated cone; the step S11 also includes driving the detection device to select at least two spaced planes along the vertical direction as detection planes, driving the detection probe to measure the measurement positions of at least 3 points at the outer edges of the detection planes, and calculating the plane center of each of the detection planes based on the measurement positions, and calculating the central axis of the central column based on multiple plane centers.

[0012] In some embodiments, the step S11 further includes driving the detection probe to detect coordinate values ​​of at least three points on the end surface of the central column to calculate the position of the end surface plane.

[0013] The second aspect of the present application also provides a detection device, including a drive system, a detection probe and a control system, wherein the control system is used to execute the odd-end face tooth axis detection method in the above technical solution; the control system can control the drive system to control the movement of the detection probe and obtain detection data.

[0014] The third aspect of the present application also provides a readable storage medium, including a program or instruction stored on the readable storage medium, which, when executed by a processor, implements the steps of the odd-end face tooth axis detection method as described in the above technical solution.

[0015] In order to solve the problem of large deviation in the existing detection method of the axis center of odd-numbered end face gears, the present invention has the following advantages: In the above technical solution, the shape features of the odd-numbered end face gear parts are first utilized. For example, the center of the bell-shaped housing of the three-axis pin universal joint is provided with a center column. The center axis of the end face gear is first roughly found, and a basic coordinate system is established for the part using this as the Z axis. Subsequent operations are performed using this basic coordinate system as a reference. The xy-axis plane of the basic coordinate system can be selected as any other plane, such as the top plane of the center axis, to establish a coordinate system based on the part for easy calculation. Since the odd-numbered end face gears are not centrally symmetrical, each tooth does not actually have a completely corresponding set of teeth. Therefore, three groups of tooth grooves that are approximately corresponding are selected and connected one by one in sequence to form a projected triangle. Then, an inscribed circle is made based on the projected triangle to calculate the correction axis. When measuring the second to fifth tooth grooves, the detection probe is first moved to above the theoretical tooth groove position based on the tooth groove center distance of the first tooth groove and the theoretically calculated angle. However, when the probe actually falls and detects, the probe may not be located at the correct tooth groove center position, but falls on the side wall of the tooth groove (the side of the tooth). At this time, the probe can be rotated and adjusted according to the origin of the basic coordinate system established in the previous sequence until it falls to the correct position. Therefore, there will be a slight deviation between the actual detected coordinate point and the theoretical coordinate point, and the deviation is used to correct the center axis obtained in the previous sequence to obtain the corrected axis. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of a method for detecting the axis center of an odd-numbered end face gear according to an embodiment is shown; Figure 2 A schematic structural diagram of an odd-numbered end face gear component according to an embodiment is shown.

[0017] Figure numerals: 1 - first tooth groove; 2 - second tooth groove; 3 - third tooth groove; 4 - fourth tooth groove; 5 - fifth tooth groove; 6 - sixth tooth groove; 10 - center column; 20 - end face tooth. DETAILED DESCRIPTION

[0018] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the present disclosure, rather than to imply any limitation on the scope of the present disclosure.

[0019] As used herein, the term "including" and its variations are to be interpreted as open-ended terms meaning "including, but not limited to." The term "based on" is to be interpreted as "based, at least in part, on." The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment." The term "another embodiment" is to be interpreted as "at least one other embodiment." Terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "vertical," "horizontal," "transverse," and "longitudinal" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily intended to better describe the present application and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationships. For example, the term "on" may, in certain circumstances, be used to indicate a dependency or connection relationship. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances. Furthermore, the terms "installed," "disposed," "provided with," "connected," and "connected" are to be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise specified, "plurality" means two or more.

[0020] This embodiment discloses a method for detecting the axis center of an odd-numbered end face tooth. Figure 1 as well as Figure 2As shown, it may include: a method for detecting odd-numbered end face tooth parts, wherein the odd-numbered end face tooth part includes a horizontally arranged end face, a center column 10 is provided at the center position of the end face, and a plurality of teeth are arranged around the center column 10 to form an end face tooth 20, and the number of teeth is odd; a method for detecting the axis center of the odd-numbered end face tooth includes: step S1, driving the detection device to establish a basic coordinate system based on the shape of the odd-numbered end face tooth part and the device coordinate system of the detection device, and the origin of the basic coordinate system is located at the center position of the end face; step S2, based on the basic coordinate system, selecting a tooth groove in the odd-numbered end face tooth part as the first tooth groove 1, and detecting the center position of the first tooth groove 1 at the first coordinate point in the basic coordinate system, and calculating the tooth groove center distance between the first tooth groove 1 and the coordinate origin based on the first coordinate point; step S3, selecting the tooth grooves that are away from the first tooth groove 1 by a first set value and a second set value as the second tooth groove 2 and the third tooth groove 3, and based on the tooth groove center distance, driving the detection probe to obtain the second coordinate point corresponding to the second tooth groove 2, so as to obtain the second coordinate point corresponding to the second tooth groove 2. and the third coordinate point corresponding to the third tooth groove 3; step S4, step S4, based on the number of teeth n, respectively select the fourth tooth groove 4 and the sixth tooth groove 6 at a distance of (n-1) / 2 relative to the first tooth groove 1 and the third tooth groove 3 along the same direction, and select the fifth tooth groove 5 at a distance of (n+1) / 2 relative to the second tooth groove 2, and drive the detection probe to detect the fourth coordinate point, the fifth coordinate point and the sixth coordinate point corresponding to the fourth tooth groove 4, the fifth tooth groove 5 and the sixth tooth groove 6 based on the tooth groove center distance; step S5, connect the first coordinate point and the fourth coordinate point and obtain the first connecting line, connect the second coordinate point and the fifth coordinate point and obtain the second connecting line, connect the third coordinate point and the sixth coordinate point and obtain the third connecting line; step S6, respectively project the first connecting line, the second connecting line and the third connecting line into the basic coordinate system, and obtain the triangle formed by the projection, calculate the center of the inscribed circle in the triangle based on the triangle, and obtain the correction axis based on the position of the center of the circle.

[0021] To obtain the axial position of the face tooth 20, three-coordinate inspection equipment is typically used to inspect the axis position. However, since the axis cannot be directly found by connecting lines for even-numbered teeth during calibration of odd-numbered teeth, and the odd number of teeth causes the gear to be non-centrally symmetrical, it is further impossible to select the corresponding tooth for the line passing through the axis. For example, the intersection point or circle center obtained by evenly distributed self-centering dot marking on multiple tooth grooves using the perpendicular bisector method or least squares fitting method may deviate significantly from the actual axis of the face tooth 20. When final inspection is performed based on the axis with the large deviation, the individual pitch deviation (the algebraic difference between the actual measured pitch value and the theoretical pitch value between two adjacent tooth surfaces, used to control the smoothness of the gear transmission) and the cumulative total pitch deviation (the maximum cumulative deviation within any arc segment of the tooth surface on the same side of the gear, used to evaluate the cumulative pitch error of the entire circumference, which directly affects the transmission precision and motion accuracy of the gear) of the face tooth 20 will be relatively large. This cannot provide true feedback on product quality and can easily lead to misjudgment of product dimensional errors, resulting in a low yield rate of the finished product in actual assembly.

[0022] In the above technical solution of the present application, the shape characteristics of the odd-numbered end face tooth parts are first utilized. Since the end face tooth 20 itself is an annular structure, a rotating body structure that is easier to determine and detect on the part can be found. A relatively rough central axis relative to the final result is first detected, and a coordinate system based on the part is established. For example, a central column 10 is provided at the center of the bell-shaped shell of the three-axis pin universal joint. The central axis of the end face tooth 20 is first roughly found, and a basic coordinate system is established for the part based on this as the Z axis, and subsequent operations are performed based on this basic coordinate system. The xy-axis plane of the basic coordinate system can select the top plane of the central axis or any other plane that is easier to detect on the part, thereby establishing a coordinate system based on the part for convenient calculation, such as Figure 2 As shown, the basic coordinate system uses the top surface of the center column 10 as the xy-axis plane. Since the odd-numbered end face teeth 20 are not centrally symmetrical, each tooth does not actually have a completely corresponding tooth. Therefore, first, according to the axis of symmetry, the fourth tooth groove 4 and the sixth tooth groove 6 corresponding to the first tooth groove 1 and the third tooth groove 3 are selected respectively. Due to the odd number of teeth, the first tooth groove 1 and the third tooth groove 3, which are farther apart, are selected to search for corresponding tooth grooves at equal intervals of (n-1) / 2 in the same direction. As for the second tooth groove 2 in the middle, the tooth groove at a distance of (n+1) / 2 in the same direction is the fifth tooth groove 5. Figure 1Take the 37 end face teeth 20 as an example, wherein the spacing between the first tooth groove 1 and the fourth tooth groove 4, and the spacing between the third tooth groove 3 and the sixth tooth groove 6 is 18 tooth grooves, and the spacing between the second tooth groove 2 and the fifth tooth groove 5 is 19 tooth grooves. Select three groups of tooth grooves that are approximately corresponding and connect them one by one in sequence. The formed lines are all formed around the actual central axis, and then use these lines to form a projected triangle, so that the inscribed circle is made based on the projected triangle to calculate the corrected axis. The purpose of the projection is that since these lines are all spatial lines, in actual situations, each tooth groove may actually have a slight error in height due to dimensional error, and the detection result of the detection probe is relatively accurate. Therefore, after the lines are formed, these lines may not actually intersect, and may pass through each other in the height direction, but the height error is small. In order to form the inscribed circle, the three lines are selected to be projected on the selected plane to ensure that the lines intersect. When measuring the second tooth groove 2 to the fifth tooth groove 5, the detection probe is first moved to above the theoretical tooth groove position based on the tooth groove center distance of the first tooth groove 1 and the theoretically calculated angle. However, when the probe actually falls and detects, the probe may not be located at the correct tooth groove center position, but falls on the side wall of the tooth groove (the side of the tooth). At this time, the probe can be rotated and adjusted according to the origin of the basic coordinate system established in the previous sequence until it falls to the correct position. Therefore, there will be a slight deviation between the actual detected coordinate point and the theoretical coordinate point, and the deviation is used to correct the center axis obtained in the previous sequence to obtain the corrected axis. When measuring the second tooth groove 2 to the fifth tooth groove 5, a three-coordinate measuring device can be used for self-centering measurement, that is, through a specific probe and software function, the center position of the measuring point can be automatically determined, thereby improving the accuracy and efficiency of the measurement.

[0023] It should be noted that when selecting the second tooth groove 2 and the third tooth groove 3, the tooth grooves with an angle of about 60 degrees and 120 degrees with the first tooth groove 1 can be selected, and the first to third tooth grooves 3 can also be set to be equally spaced, that is, the number of tooth grooves between two adjacent selected tooth grooves can be the same, so that Figure 1For example, there are 37 end face teeth 20, of which the first tooth groove 1, the second tooth groove 2 and the third tooth groove 3 are all set 6 tooth grooves apart. Furthermore, the end face teeth 20 can be divided into two sides first, and then the first to third tooth grooves 3 are set on one side, and the gears on this side are divided equally using the three selected tooth grooves. In this way, the triangle finally formed for calculating the inscribed circle is closer to an equilateral triangle, and the calculated central axis is more accurate. The detection process can be carried out with the help of high-precision three-coordinate detection equipment. The equipment can have a high-precision transmission system. When driving the detection probe to move, it can stably and accurately drive it to a predetermined position. The equipment can know the moving position of the detection probe (the coordinate value relative to the device coordinates) and can also perform calculations based on its detection results to calculate the line or surface formed by the point position obtained by the detection probe. In addition, the detection results can be corrected by algorithms.

[0024] Furthermore, in order to make the detection results more accurate, the odd-end face tooth axis detection method also includes step S8, based on the correction axis as the z-axis, a correction coordinate system is established with the center position of the circle as the origin of the coordinate system, and steps S2 to S6 are repeated. During the repetitive process, the basic coordinate system is replaced by the correction coordinate system to iteratively obtain the correction axis.

[0025] By repeatedly iterating the basic coordinate system with the corrected coordinate system, the accuracy of the final result can be effectively improved. Usually, 2 to 3 iterations can be selected. Too many iterations will increase the measurement time and reduce efficiency, and have little effect on the correction of the results. Therefore, appropriate iterative calculations can obtain more accurate axis results.

[0026] As an embodiment, in order to reduce the error caused by selecting the tooth grooves, step S8 further includes selecting the tooth grooves at the same position as the first tooth groove 1 to the sixth tooth groove 6 during the process of repeating steps S2 to S6.

[0027] Furthermore, in order to improve the accuracy, the detection probe includes a needle body extending in the vertical direction and a detection ball arranged at the bottom end of the needle body. The detection ball can detect and judge the contact state between its outer peripheral surface and the entity; step S2 also includes recording the first contact state of the detection ball and the first tooth groove 1. In steps S3 and S4, the contact state of the detection ball is consistent with the first contact state.

[0028] The outer peripheral surface of the detection ball can detect the contact with the entity. Since the tooth groove is actually a V-shaped groove, the two side walls are two adjacent tooth sides. Therefore, when the detection ball penetrates into the bottom of the groove, both sides of the detection ball can touch the two side walls of the tooth groove. Since the first tooth groove 1 is the selected reference tooth groove, the detection ball can normally touch the two side walls of the tooth groove according to the measurement requirements. This state is the first contact state. In the measurement of the second to sixth tooth grooves 6, it is based on the first tooth groove 1 and uses the measured numerical value to drive the detection ball for detection. Therefore, when the detection ball moves downward and touches the tooth groove, it may only touch one side wall of the tooth groove first due to part error. The method of the present application needs to detect this error. Therefore, it is necessary to control the detection ball to adjust the detection of the second to sixth tooth grooves 6 based on the first contact state, so that it can detect the actual size of the part in the same state of touching the two side walls of the tooth groove, thereby achieving the purpose of correcting the detection axis.

[0029] As a specific implementation, step S1 also includes, step S11, driving the detection probe of the detection equipment to detect the end face plane and the center axis of the center column 10, where the center axis of the center column 10 is the first axis; step S12, based on the first axis as the z-axis and the end face plane as the xy-axis plane, establishing a basic coordinate system on the end face plane.

[0030] As shown in the figure, the part's center column 10 and face gear 20 are coaxially arranged. Center column 10 has a simple structure and easily inspectable surfaces. Therefore, center column 10 is selected for inspection to establish a basic coordinate system for inspecting face gear 20. Furthermore, step S12 also includes establishing the x-axis and y-axis corresponding to the extension direction of the horizontal reference axis of the inspection equipment.

[0031] For ease of setup, the reference axis of the detection device may be selected as the x-axis and y-axis of the established basic coordinate system.

[0032] According to actual conditions, the central column 10 is a truncated cone; step S11 also includes driving the detection device to select at least two spaced planes along the vertical direction as detection planes, driving the detection probe to measure the measurement positions of at least 3 points at the outer edge of the detection plane, and calculating the plane center of each detection plane based on the measurement position, and calculating the central axis of the central column 10 based on multiple plane centers.

[0033] By detecting multiple spaced planes, the center points of two planes can be calculated. After connecting two or more center points, a more accurate center axis of the center column 10 can be obtained. When multiple center points cannot be directly connected, an algorithm can be used for fitting to calculate a more accurate center axis.

[0034] In order to detect the plane position and the extension direction, step S11 further includes driving the detection probe to detect the coordinate values ​​of at least three points on the end surface of the central column 10 to calculate the position of the end surface plane.

[0035] When performing dot detection on the end face of the center column 10 , at least 3 points, preferably 4 points, may be selected, and an algorithm may be used to fit the multiple points, thereby establishing a more accurate position of the end face of the center column 10 .

[0036] The second aspect of the present application discloses a detection device, which may include: a drive system, a detection probe and a control system, the control system being used to execute the odd-end face tooth axis detection method in the above technical solution; the control system can control the drive system to control the movement of the detection probe and obtain detection data.

[0037] The third aspect of the present application discloses a readable storage medium, which may include a program or instruction stored on the readable storage medium, and when the program or instruction is executed by a processor, the steps of the odd-end face tooth axis detection method in the above technical solution are implemented.

[0038] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present disclosure, and that in actual applications, various changes may be made thereto in form and detail without departing from the scope of the present disclosure.

Claims

1. A method for detecting the axis center of an odd-numbered end face tooth, characterized in that: Used for detecting parts with odd-numbered end face teeth, the parts having odd-numbered end face teeth include a horizontally arranged end face, a central column arranged at the center of the end face, and a plurality of teeth arranged around the central column, wherein the number of the teeth is an odd number; The method for detecting the axis center of the odd-numbered end face gear comprises: Step S1, driving the detection device to establish a basic coordinate system based on the shape of the odd-numbered end face gear part and the device coordinate system of the detection device, wherein the origin of the basic coordinate system is located at the center position of the end face; Step S2, based on the basic coordinate system, selecting a tooth groove in the odd-numbered end face tooth component as a first tooth groove, detecting that the center position of the first tooth groove is located at a first coordinate point in the basic coordinate system, and calculating the tooth groove center distance between the first tooth groove and the coordinate origin based on the first coordinate point; Step S3, selecting a tooth groove that is a first set value and a second set value away from the first tooth groove as a second tooth groove and a third tooth groove, and driving the detection probe to obtain a second coordinate point corresponding to the second tooth groove and a third coordinate point corresponding to the third tooth groove based on the tooth groove center distance; Step S4, based on the number n of teeth, selecting a fourth tooth groove and a sixth tooth groove at a distance of (n-1) / 2 from the first tooth groove and the third tooth groove along the same direction, and selecting a fifth tooth groove at a distance of (n+1) / 2 from the second tooth groove, and driving the detection probe to detect a fourth coordinate point, a fifth coordinate point, and a sixth coordinate point corresponding to the fourth tooth groove, the fifth tooth groove, and the sixth tooth groove, respectively, based on the tooth groove center distance; Step S5, connecting the first coordinate point and the fourth coordinate point to obtain a first connecting line, connecting the second coordinate point and the fifth coordinate point to obtain a second connecting line, and connecting the third coordinate point and the sixth coordinate point to obtain a third connecting line; Step S6, project the first line, the second line and the third line into the basic coordinate system respectively, and obtain the triangle formed by the projection, calculate the center of the inscribed circle in the triangle based on the triangle, and obtain the correction axis based on the center position.

2. The method for detecting the axis center of an odd-numbered end face gear according to claim 1, characterized in that: The method further includes step S8, wherein a correction coordinate system is established based on the correction axis being the z-axis and the center position of the circle being the origin of the coordinate system, and steps S2 to S6 are repeated. During the repetition process, the basic coordinate system is replaced by the correction coordinate system to iteratively obtain the correction axis.

3. The method for detecting the axis center of an odd-numbered end face gear according to claim 2, characterized in that: The step S8 further includes selecting the tooth grooves at the same position as the first tooth groove to the sixth tooth groove during the process of repeating the steps S2 to S6.

4. The method for detecting the axis center of an odd-numbered end face tooth according to claim 1, characterized in that: The detection probe includes a needle body extending in a vertical direction and a detection ball arranged at the bottom end of the needle body, and the detection ball can detect and determine the contact state between its outer peripheral surface and the entity; The step S2 further includes recording the initial contact state between the detection ball and the first tooth groove; In step S3 and step S4, the contact state of the detection ball is consistent with the first contact state.

5. The method for detecting the axis center of an odd-numbered end face gear according to claim 4, characterized in that: The step S1 further includes: Step S11, driving a detection probe of a detection device to detect an end surface plane and a central axis of the central column, where the central axis of the central column is a first axis; Step S12: establishing a basic coordinate system on the end face plane based on the first axis being the z-axis and the end face plane being the xy-axis plane.

6. The method for detecting the axis center of an odd-numbered end face gear according to claim 5, characterized in that: The step S12 further includes establishing the x-axis and the y-axis based on the extension direction of the horizontal reference axis of the detection device.

7. The method for detecting the axis center of an odd-numbered end face gear according to claim 6, characterized in that: The central column is a truncated cone; The step S11 also includes driving the detection device to select at least two spaced planes along the vertical direction as detection planes, driving the detection probe to measure the measurement positions of at least 3 points at the outer edges of the detection planes, and calculating the plane center of each of the detection planes based on the measurement positions, and calculating the central axis of the central column based on multiple plane centers.

8. The method for detecting the axis center of an odd-numbered end face gear according to claim 6, characterized in that: The step S11 further includes driving the detection probe to detect coordinate values ​​of at least three points on the end surface of the central column to calculate the position of the end surface plane.

9. A detection device, characterized in that: A drive system, a detection probe and a control system, wherein the control system is used to execute the method for detecting the axis center of an odd-numbered end face gear according to any one of claims 1 to 8; The control system can control the driving system to control the movement of the detection probe and obtain detection data.

10. A readable storage medium, characterized in that ， A readable storage medium stores a program or instruction, which, when executed by a processor, implements the steps of the odd-numbered end face gear axis detection method as described in any one of claims 1 to 8.

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