A tooth thickness detection method in bevel gear processing

Abstract

The present invention relates to a method for detecting tooth thickness during bevel gear processing, and belongs to the technical field of bevel gear precision detection. Since bevel gears have tooth thickness machining allowances during processing, they are difficult to be directly installed on a gear rolling inspection machine for detection. The tooth thickness caliper measurement method currently widely used in production requires a large time cost and production cost to meet high measurement accuracy. The present invention collects the basic parameters of the gear pair and the tooth thickness machining allowances during processing, and establishes and solves the tooth thickness equation based on the basic parameters of the gear pair and the tooth thickness machining allowances to obtain relative displacement, and then calculates the axial installation distance adjustment amount that should be met when the large and small wheels are installed on the gear rolling inspection machine. When installing the large and small wheels on the gear rolling inspection machine, the installation position of the large and small wheels is adjusted according to the axial installation distance adjustment amount, and then the tooth thickness of the bevel gear processed in this process is determined, thereby reducing the processing cost.

Description

Technical Field

[0001] The invention relates to a tooth thickness detection method in a bevel gear processing process, and belongs to the technical field of bevel gear precision detection. Background Art

[0002] Bevel gears consist of two meshing large gears (large wheels) and small gears (small wheels). The bevel gear tooth thickness determines the gear meshing backlash and the bending strength of the gear teeth, and is an important factor affecting the gear meshing noise. The bevel gear tooth thickness error is the main technical indicator for evaluating gear tooth accuracy. During the bevel gear processing, the tooth thickness needs to be controlled in multiple processes. For example, when milling the small wheel, the small wheel tooth thickness needs to be detected according to the large wheel tooth thickness to control the small wheel tooth thickness machining allowance; the tooth thickness detection and control when grinding the large wheel; the tooth thickness detection and control when grinding the small wheel concave surface; the tooth thickness detection and control when grinding the small wheel convex surface.

[0003] For the finished gear pair, the gear pair is assembled on the gear rolling inspection machine according to the theoretical installation distance of the large and small wheels, and then the dial indicator contact is vertically pressed on the large end tooth surface of the large wheel, the small wheel is fixed, and the large wheel is swung. The swing range of the pointer on the dial indicator is the gear pair tooth side clearance. At present, the method of detecting the gear pair tooth side clearance is only suitable for the detection of finished gear pairs. In the processing procedures that require the guarantee of the tooth thickness processing allowance, such as the small wheel concave and convex surface milling, large wheel grinding, small wheel concave (convex) surface grinding, etc., due to the existence of tooth thickness processing allowance, the gear pair cannot be installed and rolled by the gear rolling inspection machine under the designed installation distance.

[0004] Therefore, for the gear pair in the processing process, there are two existing tooth thickness detection methods: tooth thickness caliper measurement method and gear detection center measurement method.

[0005] At present, the tooth thickness caliper measurement method is widely used in production. The tooth thickness caliper is used to measure and control the chord tooth height and chord tooth thickness. This method has two disadvantages in measurement: 1) The measurement datum is the face cone, which is inconsistent with the actual installation datum, and there is a datum misalignment error. In addition, the control of the face cone must be very accurate, and it must be accurately measured on a three-coordinate measuring machine, resulting in high production costs; 2) The tooth thickness caliper measurement itself has a large error. Since the face cone measurement contact surface is very small, the measurement value is directly related to the measurer's technique, which is easy to cause a large measurement error, sometimes up to about 0.1mm. The measurement method of the gear detection center can accurately detect the gear tooth thickness, but for the processing of bevel gears with multiple varieties, small batches, and multiple processes, the detection cost is high and the detection time is long, which directly affects the production cost. Summary of the invention

[0006] The object of the present invention is to provide a method for detecting tooth thickness during bevel gear machining, so as to solve the problem of high cost caused by using tooth thickness calipers or gear detection centers to detect tooth thickness during the machining of existing bevel gears.

[0007] In order to achieve the above object, the present invention provides a method for detecting tooth thickness during bevel gear processing, comprising the following steps:

[0008] S1. Obtaining basic parameters of the gear pair of the bevel gear to be tested during processing, and the tooth thickness processing allowance of the bevel gear in this process; the basic parameters of the gear pair include the large end module, the large wheel average pressure angle, and the small wheel average pressure angle;

[0009] S2. Calculate the equivalent number of teeth of the small wheel and the equivalent number of teeth of the large wheel according to the basic parameters of the gear pair;

[0010] S3. Establish a tooth thickness equation according to the equivalent number of teeth of the small wheel, the equivalent number of teeth of the large wheel, the large end module, the average pressure angle of the large wheel, the average pressure angle of the small wheel and the tooth thickness machining allowance; the tooth thickness equation is used to characterize the relationship between the relative displacement of the large wheel and the small wheel perpendicular to the pitch cone and the tooth thickness machining allowance;

[0011] S4. Solve the tooth thickness equation to obtain the relative displacement of the large wheel and the small wheel perpendicular to the pitch cone;

[0012] S5. Calculate the adjustment amount of the axial installation distance of the large wheel when the large wheel is installed on the gear rolling inspection machine according to the relative displacement and the large wheel pitch cone angle, and calculate the adjustment amount of the axial installation distance of the small wheel when the small wheel is installed on the gear rolling inspection machine according to the relative displacement and the small wheel pitch cone angle;

[0013] S6. According to the adjustment amount of the axial installation distance of the large wheel and the axial installation distance of the small wheel, the large wheel and the small wheel are installed on the gear rolling inspection machine, and then the tooth thickness of the bevel gear to be tested processed in this process is determined.

[0014] Since there is a machining allowance for tooth thickness of bevel gears during the processing, it is difficult to directly install them on the gear rolling inspection machine for inspection. The tooth thickness caliper measurement method currently widely used in production requires a large time cost and production cost to meet high measurement accuracy. Those skilled in the art should know that when inspecting the tooth thickness of bevel gears, one of the large wheel and the small wheel must be a finished gear or a standard gear, and the other gear is the target gear that needs to be inspected for tooth thickness. The target gear that needs to be inspected for tooth thickness is not limited here, and it can be a large wheel or a small wheel. The present invention provides a method for installing a bevel gear in processing on a gear rolling inspection machine. By collecting the basic parameters of the gear pair and the tooth thickness machining allowance during the processing, the application scenario of installing large and small wheels on the gear rolling inspection machine is analyzed. If the large wheel and the small wheel are to be installed on the gear rolling inspection machine, it is necessary to make the large wheel and the small wheel produce a relative displacement relative to the pitch cone to meet the tooth thickness machining allowance that meets the target requirements. If the tooth thickness machining allowance actually processed in this processing procedure is insufficient or too large, that is, there is a processing error, at this time, it is still calculated according to the tooth thickness machining allowance that meets the target requirements, rather than calculating the tooth thickness based on the target tooth thickness machining allowance combined with the machining error. The machining error is used in the subsequent calculation of the actual side clearance. The actual side clearance is compared with the theoretical side clearance to determine whether the tooth thickness is reasonable. Therefore, it is reasonable to use the target tooth thickness machining allowance to calculate. Therefore, according to the basic parameters of the gear pair and the tooth thickness machining allowance, a tooth thickness equation is established and solved to obtain the relative displacement, and then the axial installation distance adjustment amount that should be met when the large and small wheels are installed on the gear rolling inspection machine is calculated. When installing large and small wheels on the gear rolling inspection machine, the installation positions of the large and small wheels are adjusted according to the axial installation distance adjustment amount, and then the tooth thickness of the bevel gear processed in this process is determined, thereby reducing the processing cost.

[0015] Furthermore, in the above method, the basic parameters of the gear pair also include the number of large wheel teeth, the number of small wheel teeth, the midpoint helix angle, the midpoint cone distance, the outer cone distance, the large wheel cutter head radius, the large wheel pitch cone angle and the small wheel pitch cone angle;

[0016] In step S2, the equivalent number of teeth of the small wheel is calculated based on the midpoint helix angle, the midpoint cone distance, the outer cone distance, the radius of the large wheel cutter disc, the average pressure angle of the small wheel, the small wheel pitch cone angle and the number of small wheel teeth; the equivalent number of teeth of the large wheel is also calculated based on the midpoint helix angle, the midpoint cone distance, the outer cone distance, the radius of the large wheel cutter disc, the average pressure angle of the large wheel, the large wheel pitch cone angle and the number of large wheel teeth.

[0017] A specific implementation method is provided for the process of calculating the equivalent number of teeth of the large and small wheels to facilitate the implementation of the present invention.

[0018] Furthermore, in the above method, in step S2, the large-end helix angle is calculated based on the midpoint helix angle, the midpoint cone distance, the outer cone distance and the large-wheel cutter disc radius; then the equivalent number of small-wheel teeth is calculated based on the large-end helix angle, the small-wheel average pressure angle, the small-wheel pitch cone angle and the small-wheel teeth number; and the equivalent number of large-wheel teeth is also calculated based on the large-end helix angle, the large-wheel average pressure angle, the large-wheel pitch cone angle and the large-wheel teeth number.

[0019] With respect to the calculation process of calculating the equivalent number of teeth of large and small wheels, the present invention provides a specific implementation method: first, the large-end helix angle is calculated according to the midpoint helix angle, the midpoint cone distance, the outer cone distance and the radius of the large wheel cutter disc, and then the equivalent number of teeth of the small wheel is calculated according to the large-end helix angle, the average pressure angle of the small wheel, the small wheel pitch cone angle and the number of teeth of the small wheel; the equivalent number of teeth of the large wheel is calculated according to the large-end helix angle, the average pressure angle of the large wheel, the large wheel pitch cone angle and the number of teeth of the large wheel. The calculation is simple and easy to implement.

[0020] Furthermore, in the above method, the large end helix angle is calculated by the following formula:

[0021]

[0022] In the formula, β e is the helix angle at the large end, R e is the outer cone distance, R m is the midpoint cone distance, β m is the midpoint helix angle, and r0 is the radius of the large wheel cutter.

[0023] With respect to the process of calculating the big end helix angle, a specific formula is provided to facilitate the implementation of the present invention.

[0024] Furthermore, in the above method, the equivalent number of teeth of the small wheel and the equivalent number of teeth of the large wheel are calculated by the following formula:

[0025]

[0026]

[0027] In the formula, z vne1 is the equivalent number of teeth on the small wheel, z1 is the number of teeth on the small wheel, β e is the helix angle at the large end, α n1 is the average pressure angle of the small wheel, Γ1 is the small wheel pitch angle, z vne2 is the equivalent number of teeth on the large wheel, z2 is the number of teeth on the large wheel, α n2 is the average pressure angle of the large wheel, and Γ2 is the large wheel pitch cone angle.

[0028] A specific calculation formula is provided to solve the equivalent number of teeth of the large and small wheels, so as to facilitate the implementation of the present invention.

[0029] Furthermore, in the above method, the tooth thickness equation established in step S3 is expressed by the following formula:

[0030] m ne (z vne1 +z vne2 )(invα′-invα)cosα′=τ

[0031]

[0032] In the formula, m ne is the big-endian modulus, z vne1 is the equivalent number of teeth on the small wheel, z vne2 is the equivalent number of teeth on the large wheel, α′ represents the pitch circle meshing angle of the equivalent gear after the large wheel and the small wheel are relatively displaced perpendicular to the pitch cone, α represents the average of the average pressure angle of the large wheel and the average pressure angle of the small wheel, x represents the relative displacement of the large wheel and the small wheel perpendicular to the pitch cone, and τ is the tooth thickness machining allowance.

[0033] The tooth thickness equation is explained by a specific formula to facilitate the implementation of the present invention.

[0034] Further, in the above method, in step S4, the large wheel axial installation distance adjustment amount and the small wheel axial installation distance adjustment amount are calculated by the following formula:

[0035] H p =xsinΓ1

[0036] H g =xsinΓ2

[0037] In the formula, H p H is the adjustment of the axial installation distance of the small wheel. g is the adjustment of the axial installation distance of the large wheel, x represents the relative displacement of the large wheel and the small wheel perpendicular to the pitch cone, Γ1 is the pitch cone angle of the small wheel, and Γ2 is the pitch cone angle of the large wheel.

[0038] The present invention provides a set of specific formulas to calculate the large wheel axial installation distance adjustment amount and the small wheel axial installation distance adjustment amount, which is convenient for the implementation of the present invention.

[0039] Further, in the above method, in step S6, the method for determining the tooth thickness of the bevel gear to be tested processed in this process is: according to the large wheel axial installation distance adjustment amount and the small wheel axial installation distance adjustment amount calculated in step S4, the actual installation position of the large wheel and the small wheel when the bevel gear to be tested is installed on the gear rolling inspection machine is determined, and the tooth thickness of the bevel gear to be tested processed in this process is determined by detecting the gear meshing side clearance of the large wheel and the small wheel at the actual installation position.

[0040] The large and small wheels are installed on the gear rolling inspection machine according to the axial installation distance adjustment of the large wheel and the axial installation distance adjustment of the small wheel. According to the actual installation position of the large and small wheels at this time, the gear meshing side clearance is detected, and then the tooth thickness of the bevel gear processed in this process is determined. The method is simple.

[0041] Furthermore, in the above method, in step S6, the tooth thickness is also evaluated. If the tooth thickness is greater than the pre-acquired meshing side clearance tolerance, the tooth thickness of the bevel gear to be measured processed in this process meets the tooth thickness requirement that should be met in this process; otherwise, the tooth thickness of the bevel gear to be measured processed in this process does not meet the tooth thickness requirement that should be met in this process.

[0042] Based on the determined tooth thickness, it can be judged whether the current processing step meets the tooth thickness requirements, which can help the processing personnel determine whether reprocessing is needed, thereby improving the processing efficiency.

[0043] Furthermore, in the above method, when the tooth thickness is less than the pre-acquired meshing side clearance tolerance, if the gear meshing side clearance is less than the pre-acquired large-end allowable normal side clearance, then the tooth thickness of the bevel gear to be tested processed in this process is greater than the tooth thickness requirement that should be met in this process; if the gear meshing side clearance is greater than the pre-acquired large-end allowable normal side clearance, then the tooth thickness of the bevel gear to be tested processed in this process is less than the tooth thickness requirement that should be met in this process.

[0044] According to the determined tooth thickness and the meshing side clearance tolerance obtained in advance, the situations where the tooth thickness does not meet the tooth thickness requirements are divided, providing adjustment directions for the processing personnel to reprocess and improve processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 A flowchart of a method for detecting tooth thickness during bevel gear machining in an embodiment of the method of the present invention;

[0046] Figure 2 Schematic diagram of the installation position of the bevel gear in the embodiment of the method of the present invention;

[0047] Figure 3 Schematic diagram of bevel gear installation and adjustment in an embodiment of the method of the present invention.

[0048] In the figure: 1 is the big wheel, 2 is the small wheel. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0050] Method Example:

[0051] As shown in FIG. 1 , the tooth thickness detection method in the bevel gear processing process of the present invention comprises the following steps:

[0052] S1. Obtain the basic parameters of the gear pair during bevel gear processing, as well as the tooth thickness machining allowance τ of the bevel gear in this process. According to the basic parameters of the gear pair and the tooth thickness machining allowance τ, establish the tooth thickness equation and calculate the axial installation distance adjustment of the large and small wheels. The basic parameters of the gear pair include the number of small wheel teeth z1, the number of large wheel teeth z2, and the large end module m ne , midpoint helix angle β m , midpoint cone distance R m , outer cone distance R e , axis angle ∑, large wheel cutter radius r0, small wheel pitch cone angle Γ1, large wheel pitch cone angle Γ2, small wheel average pressure angle α n1 and the average pressure angle of the large wheel α n2 .

[0053] S1.1, according to the midpoint helix angle β obtained in step S1 m , midpoint cone distance R m , outer cone distance R e and the radius of the large wheel cutter r0, the large end helix angle β is calculated by the following formula: e .

[0054]

[0055] S1.2, the large end helix angle β calculated according to step S1.1 e , and the average pressure angle of the small wheel α n1 , small wheel pitch angle Γ1 and small wheel tooth number z1, calculate the small wheel equivalent tooth number z vne1 .

[0056]

[0057] The helix angle β of the large end calculated according to step S1.1 e , and the average pressure angle of the large wheel α n2 , large wheel pitch angle Γ2 and large wheel tooth number z2, calculate the large wheel equivalent tooth number z by the following formula: vne2 .

[0058]

[0059] S1.3, if Figure 2As shown in the figure, if the large wheel and the small wheel are to be installed on the gear rolling inspection machine, it is necessary to determine the bearing installation distance adjustment of the large and small wheels, and then determine the actual installation position of the large and small wheels based on the theoretical installation position of the large and small wheels and the axial installation distance adjustment. When the large wheel and the small wheel are relatively displaced perpendicular to the pitch cone, a pitch circle tooth side clearance is generated between the large wheel and the small wheel, and the pitch circle tooth side clearance should be equal to the tooth thickness machining allowance τ. Therefore, the following tooth thickness equation is established.

[0060] f(x)=m ne (z vne1 +z vne2 )(invα′-invα)cosα′-τ

[0061]

[0062]

[0063] Where α′ represents the pitch circle meshing angle of the equivalent gear after the large wheel and the small wheel are relatively displaced perpendicular to the pitch cone, α represents the average pressure angle of the pitch circle of the large wheel and the small wheel, that is, the average of the average pressure angle of the large wheel and the average pressure angle of the small wheel, and x represents the relative displacement of the large wheel and the small wheel perpendicular to the pitch cone.

[0064] S1.4, let the function value f(x) of the tooth thickness equation established in step S4 be 0, calculate the relative displacement x of the large wheel and the small wheel perpendicular to the pitch cone, and then calculate the movement amount of the large wheel and the small wheel along the axial direction. The movement amount of the large wheel along the axial direction is the axial installation distance adjustment amount of the large wheel, and the movement amount of the small wheel along the axial direction is the axial installation distance adjustment amount of the small wheel.

[0065] The movement of the small wheel along the axis is: H p =xsinΓ1.

[0066] The displacement of the large wheel along the axis is: H g =xsinΓ2.

[0067] S2, such as Figure 3 As shown in the figure, the actual installation distance of the large wheel 1 and the small wheel 2 when installed on the gear rolling inspection machine is the sum of the designed installation distance and the axial installation distance adjustment. g and H p , calculate the actual installation distance of the large wheel and the small wheel respectively, and install the large wheel and the small wheel on the gear rolling inspection machine according to the actual installation distance.

[0068] S3. Use a dial indicator to check the gear meshing backlash δ of the large wheel and the small wheel at the actual installation distance position, that is, the large end normal backlash δ at the high center of the large end teeth.

[0069] S4. Calculate the deviation value |δ-δ0| between the detected large-end normal backlash δ and the large-end allowable normal backlash δ0, and use the deviation value as the tooth thickness of the bevel gear processed in this process.

[0070] S5. According to the pre-obtained meshing backlash tolerance Δε, determine whether the tooth thickness processed in this process meets the requirements. If |δ-δ0|≤Δε, the tooth thickness processed in this process meets the requirements; if |δ-δ0|>Δε, and δ<δ0, the tooth thickness processed is greater than the tooth thickness requirement that should be controlled in this process; if |δ-δ0|>Δε, and δ>δ0, the tooth thickness processed is greater than the tooth thickness requirement that should be controlled in this process.

[0071] Taking a bevel gear as an example, the basic parameters of the gear pair of the bevel gear include: the number of small gear teeth z1 is 12, the number of large gear teeth z2 is 38, and the large end module m ne is 7.811mm, the midpoint helix angle β m The midpoint cone distance is 25°, and the midpoint cone distance is R m 164.66mm, outer taper distance R e is 197.16 mm, the axis angle ∑ is 90°, the radius of the large wheel cutter head r0 is 114.3 mm, the small wheel pitch cone angle Γ1 is 17.525°, the large wheel pitch cone angle Γ2 is 72.475°, and the small wheel average pressure angle α n1 is 20°, the average pressure angle of the large wheel is α n2 The bevel gear tooth thickness machining allowance τ that needs to be controlled in this process is 0.6mm.

[0072] When the bevel gear tooth thickness detection method of the present invention is used for detection, the axial installation distance adjustment amount of the small wheel is finally calculated to be 0.263 mm, and the axial installation distance adjustment amount of the large wheel is 0.834 mm.

[0073] According to the design installation distance of the large and small wheels and the adjustment amount of the axial installation distance of the large and small wheels, the large and small wheels are installed on the gear rolling inspection machine, and then the gear meshing backlash δ is detected with a dial indicator, and then the tooth thickness of the bevel gear processed in this process is obtained. Then, according to the number of teeth and module of the bevel gear, the meshing backlash tolerance Δε is obtained. By comparing the tooth thickness and meshing backlash tolerance, it is shown that the tooth thickness processed in this process meets the requirements.

Claims

1. A method for detecting tooth thickness during bevel gear processing, characterized in that: The steps include: S1. Obtain the basic parameters of the gear pair of the bevel gear to be tested during processing, as well as the tooth thickness processing allowance of the bevel gear in this process; S2. Calculate the equivalent number of teeth of the small wheel and the equivalent number of teeth of the large wheel according to the basic parameters of the gear pair; the equivalent number of teeth of the small wheel z vne1 and the equivalent number of teeth on the large wheel z vne2 Calculated by the following formula: In the formula, z1 is the number of small gear teeth, β e is the helix angle at the large end, α n1 is the average pressure angle of the small wheel, Γ1 is the small wheel pitch angle, z2 is the number of teeth on the large wheel, α n2 is the average pressure angle of the large wheel, Γ2 is the large wheel pitch cone angle; S3. Establish the following tooth thickness equation: m ne (z vne1 +z vne2 )(invα ′ -invα)cosα ′ =τ In the formula, m ne is the big-endian modulus, α ′ It represents the pitch circle meshing angle of the equivalent gear after the large wheel and the small wheel are relatively displaced perpendicular to the pitch cone, α represents the average of the average pressure angle of the large wheel and the average pressure angle of the small wheel, x represents the relative displacement of the large wheel and the small wheel perpendicular to the pitch cone, and τ is the tooth thickness machining allowance; S4. Solve the tooth thickness equation to obtain the relative displacement of the large wheel and the small wheel perpendicular to the pitch cone; S5. Calculate the adjustment amount of the axial installation distance of the large wheel when the large wheel is installed on the gear rolling inspection machine according to the relative displacement and the large wheel pitch cone angle, and calculate the adjustment amount of the axial installation distance of the small wheel when the small wheel is installed on the gear rolling inspection machine according to the relative displacement and the small wheel pitch cone angle; S6. According to the adjustment amount of the axial installation distance of the large wheel and the axial installation distance of the small wheel, the large wheel and the small wheel are installed on the gear rolling inspection machine, and then the tooth thickness of the bevel gear to be tested processed in this process is determined.

2. The tooth thickness detection method in the bevel gear processing process according to claim 1 is characterized in that: The helix angle at the large end is calculated using the following formula: In the formula, β e is the helix angle at the large end, R e is the outer cone distance, R m is the midpoint cone distance, β m is the midpoint helix angle, and r0 is the radius of the large wheel cutter.

3. The tooth thickness detection method in the bevel gear processing process according to claim 1 is characterized in that: In step S4, the large wheel axial installation distance adjustment amount and the small wheel axial installation distance adjustment amount are calculated by the following formula: H p =xsinΓ1 H g =xsinΓ2 In the formula, H p H is the adjustment of the axial installation distance of the small wheel. g is the adjustment of the axial installation distance of the large wheel, x represents the relative displacement of the large wheel and the small wheel perpendicular to the pitch cone, Γ1 is the pitch cone angle of the small wheel, and Γ2 is the pitch cone angle of the large wheel.

4. The tooth thickness detection method in the bevel gear processing process according to claim 1 is characterized in that: In step S6, the method for determining the tooth thickness of the bevel gear to be tested processed in this process is: according to the large wheel axial installation distance adjustment amount and the small wheel axial installation distance adjustment amount calculated in step S4, the actual installation position of the large wheel and the small wheel when the bevel gear to be tested is installed on the gear rolling inspection machine is determined, and the tooth thickness of the bevel gear to be tested processed in this process is determined by detecting the gear meshing side clearance of the large wheel and the small wheel at the actual installation position.

5. The tooth thickness detection method in the bevel gear processing process according to claim 1, characterized in that: In step S6, the tooth thickness is also evaluated. If the tooth thickness is greater than the pre-acquired meshing backlash tolerance, the tooth thickness of the bevel gear to be measured processed in this process meets the tooth thickness requirement that should be met in this process; otherwise, the tooth thickness of the bevel gear to be measured processed in this process does not meet the tooth thickness requirement that should be met in this process.

6. The tooth thickness detection method in the bevel gear processing process according to claim 5, characterized in that: When the tooth thickness is smaller than the pre-obtained meshing backlash tolerance, if the gear meshing backlash is smaller than the pre-obtained allowable normal backlash at the large end, the tooth thickness of the bevel gear to be measured processed in this process is greater than the tooth thickness requirement that should be met in this process; if the gear meshing backlash is larger than the pre-obtained allowable normal backlash at the large end, the tooth thickness of the bevel gear to be measured processed in this process is smaller than the tooth thickness requirement that should be met in this process.

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