Fourier non-full tooth detection method

Abstract

The invention provides a Fourier non-full-tooth detection method. The Fourier non-full-tooth detection method comprises the following specific steps: S1, acquiring parameters of a gear to be detected; s2, the tooth profile normal overlap ratio and the tooth direction overlap ratio in the tooth profile evaluation range are calculated, the corresponding tooth number is obtained when the fitting overlap ratio is larger than 1, and the tooth number is smaller than the tooth number of the gear needing to be detected; and S3, inputting the tooth number obtained in the step S2 into a Klinberg detection center program for Fourier detection, wherein an obtained result is a final detection result of gear detection. The Fourier detection time is shortened by reducing the number of detection teeth, so that the detection efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of gear detection and relates to a Fourier non-full gear detection method. Background Art

[0002] At present, new energy EV or hybrid gears need to undergo Fourier testing, but the limited testing equipment and long testing time result in long grinding standby time and debugging time, which wastes grinding resources and increases the difficulty of quality control. Therefore, it is necessary to improve the testing efficiency. Summary of the invention

[0003] The present invention provides a Fourier non-full-tooth detection method which improves gear detection efficiency.

[0004] The technical solution adopted by the present invention is:

[0005] A Fourier non-full tooth detection method, the specific steps of which are as follows:

[0006] S1, obtaining the parameters of the gear to be tested;

[0007] S2, calculating the normal overlap and the tooth direction overlap within the tooth profile evaluation range, and obtaining the corresponding number of teeth when the fitting overlap is greater than 1, and the number of teeth is less than the number of teeth of the gear to be tested;

[0008] S3, input the number of teeth obtained in step S2 into the Klingelnberg test center program for Fourier detection, and the result obtained is the final test result of the gear test. The present invention shortens the Fourier detection time by reducing the number of teeth to be tested, thereby improving the detection efficiency.

[0009] Further, the parameters in step S1 include the number of teeth Z of the gear.

[0010] Furthermore, the tooth profile normal overlap ep in step S2 is calculated as follows:

[0011] ep=((Lo-Lu) / (mn*π*cosα))*cosβb;

[0012] Among them, mn represents the normal modulus, α represents the pressure angle, βb represents the base circle helix angle, Lo represents the length of the starting evaluation circle, and Lu represents the length of the final evaluation circle.

[0013] Furthermore, the calculation of the tooth contact degree el in step S2 is as follows:

[0014] el=B*x*tanβb / ((mt*cosβb)*π);

[0015] Where mt represents the end face modulus, α represents the pressure angle, βb represents the base circle helix angle, B represents the tooth width, and x represents the tooth width evaluation coefficient.

[0016] Further, Zα=Z / ep, Zβ=Z / el, Zα means that the normal overlap of the tooth profile within the tooth profile evaluation range is greater than 1, which is the number of teeth obtained, and Zβ means that the direction overlap of the tooth profile within the tooth profile evaluation range is greater than 1, which is the number of teeth obtained;

[0017] The larger value of Zα and Zβ is taken as the final detection tooth number Z1.

[0018] Furthermore, the evaluation range of the tooth shape is between the evaluation end height zo and the evaluation start height zu, the middle position of the tooth width is 0, the zo position is +x*B*0.5, and the zu position is -x*B*0.5.

[0019] Further, step S3 includes a verification step, in which the detection result obtained by inputting the number of teeth Z of the gear into the Klingelnberg detection center program for Fourier detection is consistent with the detection result obtained by inputting the detection number of teeth Z1 into the Klingelnberg detection center program for Fourier detection.

[0020] Furthermore, the detection results include order and amplitude.

[0021] Beneficial effects of the present invention: The present invention shortens the Fourier detection time by reducing the number of detection teeth, thereby improving the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the length range of the tooth profile evaluation circle of the present invention.

[0023] Figure 2 It is a schematic diagram of the tooth profile evaluation height range of the present invention.

[0024] Figure 3 This is a schematic diagram of the calculation results of the number of teeth detected according to an example of the present invention.

[0025] Figure 4 This is a schematic diagram of the measurement option interface when the present invention is tested.

[0026] Figure 5 This is a schematic diagram of the tooth catalog interface when testing the present invention.

[0027] Figure 6 This is a schematic diagram of the detection result obtained when the number of teeth of the gear is input in the present invention.

[0028] Figure 7 This is a schematic diagram of the detection result obtained when the number of teeth to be detected is input in the present invention. DETAILED DESCRIPTION

[0029] The present invention is further described below in conjunction with specific embodiments, but the present invention is not limited to these specific embodiments. Those skilled in the art should recognize that the present invention covers all possible alternatives, improvements and equivalents within the scope of the claims.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, the meaning of "multiple" is two or more, unless otherwise clearly defined.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] See also Figure 1-7 , a Fourier non-full tooth detection method, the specific steps are as follows:

[0034] S1, obtaining the parameters of the gear to be detected, including the number of teeth Z of the gear. ;

[0035] S2, calculating the normal overlap and the tooth direction overlap within the tooth profile evaluation range, and obtaining the corresponding number of teeth when the fitting overlap is greater than 1, and the number of teeth is less than the number of teeth of the gear to be tested;

[0036] The calculation of the tooth profile normal overlap ep in step S2 is as follows:

[0037] ep=((Lo-Lu) / (mn*π*cosα))*cosβb;

[0038] Among them, mn represents the normal modulus, α represents the pressure angle, βb represents the base circle helix angle, Lo represents the length of the starting evaluation circle, and Lu represents the length of the final evaluation circle.

[0039] The calculation of the tooth contact degree el in step S2 is as follows:

[0040] el=B*x*tanβb / ((mt*cosβb)*π);

[0041] Where mt represents the end face modulus, α represents the pressure angle, βb represents the base circle helix angle, B represents the tooth width, and x represents the tooth width evaluation coefficient.

[0042] Zα=Z / ep,Zβ=Z / el,Zα means the normal overlap of tooth profile within the tooth profile evaluation range>1 is the number of teeth obtained,Zβ means the direction overlap of tooth profile within the tooth profile evaluation range>1 is the number of teeth obtained;

[0043] The larger value of Zα and Zβ is taken as the final detection tooth number Z1.

[0044] The evaluation range of the tooth shape is between the evaluation end height zo and the evaluation start height zu. The middle position of the tooth width is 0, the zo position is +x*B*0.5, and the zu position is -x*B*0.5.

[0045] S3, input the number of teeth obtained in step S2 into the Klingelnberg test center program for Fourier detection, and the result obtained is the final test result of the gear test. The present invention shortens the Fourier detection time by reducing the number of teeth to be tested, thereby improving the detection efficiency.

[0046] Specifically, the parameters of the gear to be tested, such as the number of teeth 21, and some related parameters, such as the end module, pressure angle, base circle helix angle, tooth width, tooth width evaluation coefficient, and normal module are obtained. Through step S2, Zα=13, Zβ=11 are calculated, and 13 is taken as the number of teeth Z1 for testing.

[0047] Input Z1=13 into the Klingelnberg Test Center program to perform Fourier test to obtain the test results, including order and amplitude, as shown in 7. During the test, check the tooth shape and tooth direction in the measurement option interface, and optionally check the pitch and accumulation. Check continuous in the tooth catalog interface and fill in the number of teeth to be measured, 13.

[0048] Then input Z=21 into the Klingelnberg test center program to perform Fourier test and obtain the test results, see Figure 6 shown.

[0049] The comparison results are shown in Table 1.

[0050] Table 1

[0051] Number of teeth profile O 21 63 84 42 168 21 left A 0.14 0.1 0.05 0.04 0.02 13 A 0.14 0.1 0.05 0.05 0.02 Number of teeth Helix O 21 63 84 42 15 21 left A 0.07 0.06 0.04 0.03 0.02 13 A 0.07 0.06 0.04 0.03 Number of teeth profile O 21 42 63 21 right A 0.3 0.11 0.1 13 A 0.31 0.1 0.11 Number of teeth Helix O 21 42 63 21 right A 0.14 0.06 0.03 13 A 0.14 0.06 0.02

[0052] In practice, 21 teeth and 13 teeth were used for Fourier detection respectively. The result of 13 teeth was basically consistent with that of 21 teeth after eliminating the interference caused by foreign matter on the right tooth surface.

[0053] Through calculation and example detection, it is found that reducing the number of detected teeth has little effect on the final Fourier detection result, which can effectively replace the full-tooth detection and reduce the detection time.

Claims

1. A Fourier non-full tooth detection method, the specific steps of which are as follows: S1, obtaining the parameters of the gear to be tested; S2, calculating the normal overlap and the tooth direction overlap within the tooth profile evaluation range, and obtaining the corresponding number of teeth when the fitting overlap is greater than 1, and the number of teeth is less than the number of teeth of the gear to be tested; S3, input the number of teeth obtained in step S2 into the Klingelnberg test center program for Fourier detection, and the result obtained is the final test result of the gear test.

2. A Fourier non-full tooth detection method according to claim 1, characterized in that: The parameters in step S1 include the number of teeth Z of the gear.

3. A Fourier non-full tooth detection method according to claim 2, characterized in that: The calculation of the tooth profile normal overlap ep in step S2 is as follows: ep=((Lo-Lu) / (mn*π*cosα))*cosβb; Among them, mn represents the normal modulus, α represents the pressure angle, βb represents the base circle helix angle, Lo represents the length of the starting evaluation circle, and Lu represents the length of the final evaluation circle.

4. The Fourier non-full tooth detection method according to claim 3, characterized in that: The calculation of the tooth contact degree el in step S2 is as follows: el=B*x*tanβb / ((mt*cosβb)*π); Where mt represents the end face modulus, α represents the pressure angle, βb represents the base circle helix angle, B represents the tooth width, and x represents the tooth width evaluation coefficient.

5. The Fourier non-full tooth detection method according to claim 5, characterized in that: Zα=Z / ep,Zβ=Z / el,Zα means the normal overlap of tooth profile within the tooth profile evaluation range>1 is the number of teeth obtained,Zβ means the direction overlap of tooth profile within the tooth profile evaluation range>1 is the number of teeth obtained; The larger value of Zα and Zβ is taken as the final detection tooth number Z1.

6. A Fourier non-full tooth detection method according to claim 4, characterized in that: The evaluation range of the tooth shape is between the evaluation end height zo and the evaluation start height zu. The middle position of the tooth width is 0, the zo position is +x*B*0.5, and the zu position is -x*B*0.

5.

7. A Fourier non-full tooth detection method according to claim 6, characterized in that: Step S3 includes a verification step, in which the detection result obtained by inputting the number of teeth Z of the gear into the Klingelnberg detection center program for Fourier detection is consistent with the detection result obtained by inputting the detection number of teeth Z1 into the Klingelnberg detection center program for Fourier detection.

8. A Fourier non-full tooth detection method according to claim 7, characterized in that: The test results include order and amplitude.

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