Design method of contact spot of high sealing high precision spiral bevel gear

Abstract

The application discloses a high-sealing high-precision spiral bevel gear contact spot design method, which comprises the following steps: step 1, obtaining a part processing adjustment card; step 2, first inputting part basic parameters, generating a parameter page through Gleason calculation, and comparing the obtained reference page with the adjustment card parameters; step 3, when a spiral bevel gear quality qualified signal of a comparison module is obtained, the data of a pinion is obtained, and whether the midpoint spot is moderate in size and whether it runs out of the tooth surface is judged; and step 4, an adjustment coefficient is calculated according to the length coefficient, the width coefficient, the convex surface diagonal line coefficient and the concave surface diagonal line coefficient of the pinion. The application improves the adjustment precision of the spiral bevel gear contact spot and guarantees the qualification of the spiral bevel gear contact spot.

Description

Technical Field

[0001] This invention relates to the field of bevel gear technology, and more specifically to a method for designing contact spots for high-sealing, high-precision spiral bevel gears. Background Technology

[0002] Chinese Patent No. CN104526250B discloses a method for repairing defective gear meshing spots during gear reducer assembly, comprising the following steps: meshing the tooth surfaces of the driving gear and the driven gear; applying a thin film coating to the driving gear and a portion of the driven gear tooth surface; applying white adhesive paper to the non-meshing contact spots on the driving and driven gear tooth surfaces, and then applying the adhesive paper until the involute portion of the paper completely covers the meshing contact spots; removing the adhesive paper and measuring its thickness with a micrometer; calculating the repair amount and helix angle variation based on the thickness; and then inputting the data into a forming mill for refinishing the tooth surfaces.

[0003] However, in the aforementioned prior art, there is a problem of low adjustment accuracy during the adjustment of the contact pattern of the spiral bevel gear. Summary of the Invention

[0004] The purpose of this invention is to solve the problems mentioned above in the background art, and to propose a high-sealing, high-precision spiral bevel gear contact spot design method.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A method for designing the contact pattern of high-sealing, high-precision spiral bevel gears includes the following steps:

[0007] Step 1: Obtain the part machining adjustment card;

[0008] Step 2: First, input the basic parameters of the part, generate a parameter page using Gleason calculation software, compare the obtained reference page with the parameters of the adjustment card, and generate a corresponding quality qualified signal for the spiral bevel gear;

[0009] Step 3: When the quality of the spiral bevel gear is qualified, the data of the pinion is obtained, and the size of the midpoint spot of the pinion is judged and whether it runs off the tooth surface.

[0010] Step 4: Calculate the adjustment coefficient based on the length coefficient, width coefficient, convex face diagonal coefficient, and concave face diagonal coefficient of the pinion;

[0011] Step 5: Calculate and analyze the adjustment coefficients of the adjustment module to determine the predicted value of its central spot;

[0012] Step 6: Obtain the adjustment qualification signal from the prediction module and calculate the adjustment processing value accordingly;

[0013] Step 7: Upon receiving the unqualified adjustment signal from the prediction module, compensate for the adjustment value.

[0014] As a further aspect of the present invention: In step 2, the number of teeth, module, pressure angle, helix angle, tooth width, direction of rotation, shaft intersection angle and grinding wheel diameter of the adjustment card and reference page are obtained, and the difference is calculated. Then, all the differences are added together to obtain the error value CW.

[0015] Compare the error value CW with the error threshold;

[0016] If the value is less than the specified value, a quality pass signal for the spiral bevel gear is generated.

[0017] If the value is greater than the specified value, a signal indicating that the spiral bevel gear is of substandard quality will be generated.

[0018] As a further aspect of the present invention: in step 3, the parameter data of the pinion is obtained, which includes the concave surface area of ​​the pinion, the convex surface area of ​​the pinion, the length coefficient, and the width coefficient, and are respectively labeled as OB, IB, Lp, and Kp;

[0019] Through formula In the calculation, the value of the midpoint spot Xb is obtained; a1, a2, a3, and a4 are weighting coefficients.

[0020] As a further aspect of the present invention: the obtained midpoint spot value Xb is compared with the midpoint spot threshold;

[0021] If it is greater than that, an adjustment signal is generated;

[0022] If it is less than, generate an unadjusted signal.

[0023] As a further aspect of the present invention: step 4 includes:

[0024] Obtain the pinion length coefficient Lp, pinion width coefficient Kp, pinion length standard coefficient Lpb, and pinion width standard coefficient Kpb;

[0025] The difference between the pinion length coefficient Lp and the pinion length standard coefficient Lpb is calculated to obtain the length coefficient difference CLp. Similarly, the difference between the pinion width coefficient Kp and the pinion width standard coefficient Kpb is calculated to obtain the width coefficient difference CKp.

[0026] Substitute the obtained length coefficient difference CLp and width coefficient difference CKp into the formula. In the calculation, the gross deviation value Zpc is obtained; where b1 and b2 are both proportionality coefficients;

[0027] Set coarse adjustment coefficients and label them as KC. j; j = 1, 2, ..., w; each coarse adjustment coefficient corresponds to a coarse deviation range value, namely (Wc1, Wc2], (Wc2, Wc3], ..., (Wc w Wc w+1 ]; and Wc1 < Wc2 < ... < Wc w <Wc w+1 ;

[0028] When the gross deviation value Zpc∈(Wc) w Wc w+1 When [the value is], the coarse adjustment factor is KC. w .

[0029] As a further aspect of the present invention: step 4 further includes:

[0030] Obtain the convex face diagonal coefficient Axt, the concave face diagonal coefficient Axa, and the convex face diagonal standard coefficient Axtb and the concave face diagonal standard coefficient Axab;

[0031] The difference between the convex face diagonal coefficient Axt and the convex face diagonal standard coefficient Axtb is calculated to obtain the length coefficient difference CAxt. Similarly, the difference between the concave face diagonal coefficient Axa and the concave face diagonal standard coefficient Axab is calculated to obtain the concave face coefficient difference CAxa.

[0032] Substitute the obtained length coefficient difference CAxt and concave surface coefficient difference CAxa into the formula. In the calculation, the fine deviation value Zpx is obtained; where c1 and c2 are both proportionality coefficients;

[0033] Set fine adjustment coefficients and label them KX respectively. j ; j = 1, 2, ..., w; each fine adjustment coefficient corresponds to a fine deviation range value, namely (Wx1, Wx2], (Wx2, Wx3], ..., (Wx w Wx w+1 ]; and Wx1 < Wx2 < ... < Wx w <Wx w+1 ;

[0034] When the fine deviation value Zpx∈(Wx) w Wx w+1 When [the value is] , the fine adjustment factor is KX. w .

[0035] As a further aspect of the present invention, it also includes the following steps:

[0036] The coarse adjustment coefficient obtained from the coarse adjustment submodule is KC. w The standard coefficients for pinion length (Lpb) and pinion width (Kpb) are used; and the coarse adjustment coefficient for the fine adjustment submodule is KX.w And the standard coefficient of the convex face diagonal Axtb, and the standard coefficient of the concave face diagonal Axab;

[0037] Through formula The predicted value XYb of the central spot is calculated; where d1 and d2 are both scaling factors.

[0038] The predicted value XYb of the center spot is compared with the midpoint spot threshold.

[0039] If it is greater than that, an adjustment failure signal is generated;

[0040] If it is less than, an adjustment pass signal is generated.

[0041] As a further aspect of the present invention, it also includes the following steps:

[0042] The coarse adjustment coefficient obtained from the coarse adjustment submodule is KC. w And the standard coefficients for pinion length Lpb and pinion width Kpb, through the formula The coarse adjustment value ZC is calculated.

[0043] As a further aspect of the present invention: the coarse adjustment coefficient of the fine adjustment submodule is obtained as KX. w The standard coefficients of the convex face diagonal, Axtb and the standard coefficients of the concave face diagonal, are obtained through the formula... The fine adjustment value ZX is calculated.

[0044] The beneficial effects of this invention are:

[0045] The spiral bevel gear contact pattern design method of the present invention determines the necessity of pattern adjustment and whether the part is qualified by collecting and comparing data of the processed parts; then, based on the data of qualified parts, it determines whether the pattern size is appropriate and whether it runs out of the tooth surface; and adjusts accordingly by using the pinion length coefficient and width coefficient for coarse adjustment, and then using the convex face diagonal coefficient and concave face diagonal coefficient of the gear for fine adjustment, generating adjustment values ​​for milling; and simulates and predicts the adjustment data to determine whether it is qualified, and performs compensation processing if it is not qualified, thereby improving the adjustment accuracy of the spiral bevel gear contact pattern and ensuring that the spiral bevel gear contact pattern is qualified. Attached Figure Description

[0046] The invention will now be further described with reference to the accompanying drawings.

[0047] Figure 1 This is a system block diagram of the present invention. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] Example 1

[0050] Please see Figure 1 As shown, this invention is a high-sealing, high-precision spiral bevel gear contact spot design system, comprising:

[0051] After acquiring the design drawings of the parts to be processed, the data acquisition module inputs the basic parameters of the parts through the calculation software, and finally calculates the part processing adjustment card; the basic parameters of the parts include the number of teeth, module, tooth width, and pressure angle;

[0052] In the comparison module, the basic parameters of the part are first input, and a parameter page is generated by the Gleason calculation software. The obtained reference page is then compared with the parameters of the adjustment card.

[0053] The specific working process of this comparison module is as follows:

[0054] Step 1: Obtain the number of teeth, module, pressure angle, helix angle, tooth width, direction of rotation, shaft intersection angle, and grinding wheel diameter from the adjustment card and reference page, calculate the difference, and then add all the differences to obtain the error value CW;

[0055] Step 2: Compare the error value CW with the error threshold;

[0056] If the error value CW is less than the error threshold, a quality qualified signal for the spiral bevel gear is generated, it is marked as excellent, and spot adjustment processing is carried out.

[0057] If the error value CW is greater than the error threshold, a signal indicating that the spiral bevel gear is of substandard quality will be generated, and it will be marked as a defective product without any spot adjustment processing.

[0058] When the judgment module receives the quality qualified signal of the spiral bevel gear from the comparison module, it acquires the data of the pinion and judges whether the midpoint spot of the pinion is of appropriate size and whether it runs off the tooth surface.

[0059] The specific working process of this judgment module is as follows:

[0060] Step 1: Obtain the parameter data of the pinion, which includes the concave surface area, convex surface area, length coefficient, and width coefficient of the pinion, and label them as OB, IB, Lp, and Kp respectively;

[0061] The concave surface area OB, convex surface area IB, length coefficient Lp, and width coefficient Kp of the pinion are weighted and assigned. The weight coefficients of the concave surface area OB, convex surface area IB, length coefficient Lp, and width coefficient Kp of the pinion are a1, a2, a3, and a4, respectively, where a1+a2+a3+a4=1, and a1, a2, a3, and a4 are all greater than 0.

[0062] Step 2: Using the formula In the middle, the value of the midpoint spot Xb is calculated;

[0063] Step 3: Compare the obtained midpoint spot value Xb with the midpoint spot threshold;

[0064] If the midpoint spot value Xb is greater than the midpoint spot threshold, it indicates that the midpoint spot size is inappropriate and will run off the tooth surface, thus generating an adjustment signal;

[0065] If the midpoint spot value Xb is less than the midpoint spot threshold, it means that the midpoint spot size is appropriate and will not run out of the tooth surface, and an unadjusted signal is generated.

[0066] The adjustment module includes a coarse adjustment submodule and a fine adjustment submodule, which calculates the adjustment coefficient based on the length coefficient, width coefficient, convex face diagonal coefficient, and concave face diagonal coefficient of the pinion.

[0067] The coarse adjustment submodule adjusts the spots by adjusting the length and width coefficients of the pinion.

[0068] The specific working process of this coarse adjustment submodule is as follows:

[0069] Step 1: Obtain the pinion length coefficient Lp, pinion width coefficient Kp, pinion length standard coefficient Lpb, and pinion width standard coefficient Kpb;

[0070] Step 2: Calculate the difference between the pinion length coefficient Lp and the pinion length standard coefficient Lpb to obtain the length coefficient difference CLp. Similarly, calculate the difference between the pinion width coefficient Kp and the pinion width standard coefficient Kpb to obtain the width coefficient difference CKp.

[0071] Step 3: Substitute the obtained length coefficient difference CLp and width coefficient difference CKp into the formula. In the calculation, the gross deviation value Zpc is obtained; where b1 and b2 are both proportionality coefficients, with b1 taking a value of 0.548 and b2 taking a value of 0.268.

[0072] Step 4: Set the coarse adjustment coefficients and label them as KC. j; j = 1, 2, ..., w; each coarse adjustment coefficient corresponds to a coarse deviation range value, namely (Wc1, Wc2], (Wc2, Wc3], ..., (Wc w Wc w+1 ]; and Wc1 < Wc2 < ... < Wc w <Wc w+1 ;

[0073] When the gross deviation value Zpc∈(Wc) w Wc w+1 When [the value is] , the coarse adjustment factor is KC. w ;

[0074] Among them, the fine adjustment submodule adjusts the spots by adjusting the diagonal coefficients of the convex and concave faces of the pinion.

[0075] The specific working process of this fine-tuning submodule is as follows:

[0076] Step 1: Obtain the convex face diagonal coefficient Axt, the concave face diagonal coefficient Axa, and the convex face diagonal standard coefficient Axtb and the concave face diagonal standard coefficient Axab;

[0077] Step 2: Calculate the difference between the convex face diagonal coefficient Axt and the convex face diagonal standard coefficient Axtb to obtain the length coefficient difference CAxt. Similarly, calculate the difference between the concave face diagonal coefficient Axa and the concave face diagonal standard coefficient Axab to obtain the concave face coefficient difference CAxa.

[0078] Step 3: Substitute the obtained length coefficient difference CAxt and concave surface coefficient difference CAxa into the formula. In the calculation, the fine deviation value Zpx is obtained; where c1 and c2 are both proportionality coefficients, with c1 taking the value of 0.521 and c2 taking the value of 0.369;

[0079] Step 4: Set the fine adjustment coefficients and label them as KX. j ; j = 1, 2, ..., w; each fine adjustment coefficient corresponds to a fine deviation range value, namely (Wx1, Wx2], (Wx2, Wx3], ..., (Wx w Wx w+1 ]; and Wx1 < Wx2 < ... < Wx w <Wx w+1 ;

[0080] When the fine deviation value Zpx∈(Wx) w Wx w+1 When [the value is] , the fine adjustment factor is KX. w ;

[0081] The prediction module calculates and analyzes the adjustment coefficients of the adjustment module to determine the predicted value of the central spot.

[0082] The specific working process of this prediction module is as follows:

[0083] Step 1: Obtain the coarse adjustment coefficient KC from the coarse adjustment submodule. w The standard coefficients for pinion length (Lpb) and pinion width (Kpb) are used; and the coarse adjustment coefficient for the fine adjustment submodule is KX. w And the standard coefficient of the convex face diagonal Axtb, and the standard coefficient of the concave face diagonal Axab;

[0084] Step 2: Using the formula The predicted value XYb of the central spot is calculated; where d1 and d2 are both proportionality coefficients, with d1 taking the value of 0.954 and d2 taking the value of 0.657.

[0085] Step 3: Compare the predicted value XYb of the center spot with the midpoint spot threshold;

[0086] If the predicted value XYb of the center spot is greater than the threshold of the midpoint spot, it indicates that the size of the midpoint spot is inappropriate and will run off the tooth surface, thus generating an adjustment failure signal.

[0087] If the predicted value XYb of the center spot is less than the threshold of the midpoint spot, it means that the size of the midpoint spot is appropriate and will not run out of the tooth surface, and an adjustment qualified signal is generated.

[0088] The execution module receives the adjustment qualification signal from the prediction module and calculates the adjustment processing value accordingly.

[0089] The specific working process of this execution module is as follows:

[0090] Step 1: Obtain the coarse adjustment coefficient KC from the coarse adjustment submodule. w And the standard coefficients for pinion length Lpb and pinion width Kpb, through the formula The coarse adjustment value ZC is calculated.

[0091] Step 2: Obtain the coarse adjustment coefficient KX from the fine adjustment submodule. w The standard coefficients of the convex face diagonal, Axtb and the standard coefficients of the concave face diagonal, are obtained through the formula... The fine adjustment value ZX is calculated.

[0092] Step 3: Send the obtained coarse adjustment value ZC and fine adjustment value ZX to the gear milling equipment for processing;

[0093] The verification module receives an adjustment failure signal from the prediction module and compensates for the adjustment value.

[0094] The specific working process of this verification module is as follows:

[0095] Step 1: Obtain the predicted value XYb of the center spot and the threshold ZYb of the midpoint spot, and calculate the difference to obtain the predicted difference Cy;

[0096] Step 2: Using the formula The calculated adjustment compensation coefficient is Kb;

[0097] Step 3: Substitute the obtained adjustment compensation coefficient Kb into the formula. In the middle, the coarse adjustment compensation value ZCB is calculated and substituted into the formula. In the process, the fine adjustment compensation value ZXB is calculated;

[0098] Step 4: Send the obtained coarse adjustment compensation value ZCB and fine adjustment compensation value ZXB to the gear milling equipment for processing.

[0099] The spiral bevel gear contact spot adjustment system of the present invention determines the necessity of spot adjustment and whether the part is qualified by collecting and comparing data of the processed parts; then, based on the data of qualified parts, it determines whether the spot size is appropriate and whether it runs out of the tooth surface; and adjusts accordingly. It performs coarse adjustment by using the pinion length coefficient and width coefficient, and fine adjustment by using the convex face diagonal coefficient and concave face diagonal coefficient of the gear, and generates adjustment values ​​for milling processing; and simulates and predicts the adjustment data to determine whether it is qualified, and performs compensation processing if it is not qualified, thereby ensuring that the contact spot of the spiral bevel gear is qualified.

[0100] Example 2

[0101] Based on the above embodiment 1, the high-sealing, high-precision spiral bevel gear contact pattern design method of the present invention includes the following steps:

[0102] Step 1: After obtaining the design drawings of the part to be processed, input the basic parameters of the part through the calculation software, and finally calculate the part processing adjustment card;

[0103] Step 2: First, input the basic parameters of the part, generate a parameter page using Gleason calculation software, and compare the obtained reference page with the parameters of the adjustment card;

[0104] Obtain the number of teeth, module, pressure angle, helix angle, tooth width, direction of rotation, shaft intersection angle, and grinding wheel diameter from the adjustment card and reference page, calculate the difference, and then add all the differences to obtain the error value CW;

[0105] Compare the error value CW with the error threshold;

[0106] If the value is less than the specified value, a quality pass signal for the spiral bevel gear is generated.

[0107] If the value is greater than 1, a signal indicating that the spiral bevel gear is of substandard quality will be generated.

[0108] Step 3: When the spiral bevel gear quality pass signal is obtained from the comparison module, the data of the pinion is obtained, and the size of the midpoint spot of the pinion is judged and whether it runs off the tooth surface.

[0109] The parameter data of the pinion is obtained, including the concave surface area, convex surface area, length coefficient, and width coefficient of the pinion, and is marked as OB, IB, Lp, and Kp respectively.

[0110] Through formula In the calculation, the value of the midpoint spot Xb is obtained; a1, a2, a3, and a4 are weighting coefficients;

[0111] The obtained midpoint spot value Xb is compared with the midpoint spot threshold.

[0112] If it is greater than that, an adjustment signal is generated;

[0113] If it is less than, an unadjusted signal is generated;

[0114] Step 4: Calculate the adjustment coefficient based on the length coefficient, width coefficient, convex face diagonal coefficient, and concave face diagonal coefficient of the pinion;

[0115] The pinion length coefficient Lp, pinion width coefficient Kp, pinion length standard coefficient Lpb, and pinion width standard coefficient Kpb are obtained.

[0116] The difference between the pinion length coefficient Lp and the pinion length standard coefficient Lpb is calculated to obtain the length coefficient difference CLp. Similarly, the difference between the pinion width coefficient Kp and the pinion width standard coefficient Kpb is calculated to obtain the width coefficient difference CKp.

[0117] Substitute the obtained length coefficient difference CLp and width coefficient difference CKp into the formula. In the calculation, the gross deviation value Zpc is obtained; where b1 and b2 are both proportionality coefficients;

[0118] Set coarse adjustment coefficients and label them as KC. j ; j = 1, 2, ..., w; each coarse adjustment coefficient corresponds to a coarse deviation range value, namely (Wc1, Wc2], (Wc2, Wc3], ..., (Wc w Wc w+1 ]; and Wc1 < Wc2 < ... < Wc w <Wc w+1 ;

[0119] When the gross deviation value Zpc∈(Wc) w Wcw+1 When [the value is] , the coarse adjustment factor is KC. w .

[0120] Obtain the convex face diagonal coefficient Axt, the concave face diagonal coefficient Axa, and the convex face diagonal standard coefficient Axtb and the concave face diagonal standard coefficient Axab;

[0121] The difference between the convex face diagonal coefficient Axt and the convex face diagonal standard coefficient Axtb is calculated to obtain the length coefficient difference CAxt. Similarly, the difference between the concave face diagonal coefficient Axa and the concave face diagonal standard coefficient Axab is calculated to obtain the concave face coefficient difference CAxa.

[0122] Substitute the obtained length coefficient difference CAxt and concave surface coefficient difference CAxa into the formula. In the calculation, the fine deviation value Zpx is obtained; where c1 and c2 are both proportionality coefficients;

[0123] Set fine adjustment coefficients and label them KX respectively. j ; j = 1, 2, ..., w; each fine adjustment coefficient corresponds to a fine deviation range value, namely (Wx1, Wx2], (Wx2, Wx3], ..., (Wx w Wx w+1 ]; and Wx1 < Wx2 < ... < Wx w <Wx w+1 ;

[0124] When the fine deviation value Zpx∈(Wx) w Wx w+1 When [the value is] , the fine adjustment factor is KX. w ;

[0125] Step 5: Calculate and analyze the adjustment coefficients of the adjustment module to determine the predicted value of its central spot;

[0126] The coarse adjustment coefficient obtained from the coarse adjustment submodule is KC. w The standard coefficients for pinion length (Lpb) and pinion width (Kpb) are used; and the coarse adjustment coefficient for the fine adjustment submodule is KX. w And the standard coefficient of the convex face diagonal Axtb, and the standard coefficient of the concave face diagonal Axab;

[0127] Through formula The predicted value XYb of the central spot is calculated; where d1 and d2 are both proportionality coefficients, with d1 taking the value of 0.954 and d2 taking the value of 0.657.

[0128] The predicted value XYb of the center spot is compared with the midpoint spot threshold.

[0129] If the predicted value XYb of the center spot is greater than the threshold of the midpoint spot, it indicates that the size of the midpoint spot is inappropriate and will run off the tooth surface, thus generating an adjustment failure signal.

[0130] If the predicted value XYb of the center spot is less than the threshold of the midpoint spot, it means that the size of the midpoint spot is appropriate and will not run out of the tooth surface, and an adjustment qualified signal is generated.

[0131] Step 6: Obtain the adjustment qualification signal from the prediction module and calculate the adjustment processing value accordingly;

[0132] The coarse adjustment coefficient obtained from the coarse adjustment submodule is KC. w And the standard coefficients for pinion length Lpb and pinion width Kpb, through the formula The coarse adjustment value ZC is calculated.

[0133] The coarse adjustment coefficient obtained from the fine adjustment submodule is KX. w The standard coefficients of the convex face diagonal, Axtb and the standard coefficients of the concave face diagonal, are obtained through the formula... The fine adjustment value ZX is calculated.

[0134] The coarse adjustment value ZC and the fine adjustment value ZX are sent to the gear milling equipment for processing.

[0135] Step 7: Upon receiving the adjustment failure signal from the prediction module, compensate the adjustment value.

[0136] The predicted value XYb of the center spot and the threshold ZYb of the midpoint spot are obtained, and the difference is calculated to obtain the predicted difference Cy.

[0137] Through formula The calculated adjustment compensation coefficient is Kb;

[0138] Substitute the obtained adjustment compensation coefficient, Kb, into the formula. In the middle, the coarse adjustment compensation value ZCB is calculated and substituted into the formula. In the process, the fine adjustment compensation value ZXB is calculated;

[0139] The obtained coarse adjustment compensation value ZCB and fine adjustment compensation value ZXB are sent to the gear milling equipment for processing.

[0140] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A method for designing the contact pattern of a high-sealing, high-precision spiral bevel gear, characterized in that, Includes the following steps: Step 1: Obtain the part machining adjustment card; Step 2: First, input the basic parameters of the part, generate a parameter page using Gleason calculation software, compare the obtained reference page with the parameters of the adjustment card, and generate a corresponding quality qualified signal for the spiral bevel gear; Step 3: When the quality of the spiral bevel gear is qualified, the data of the pinion is obtained, and the size of the midpoint spot of the pinion is judged and whether it runs off the tooth surface. Step 4: Calculate the adjustment coefficient based on the length coefficient, width coefficient, convex face diagonal coefficient, and concave face diagonal coefficient of the pinion; Step 5: Calculate and analyze the adjustment coefficients of the adjustment module to determine the predicted value of its central spot; Step 6: Obtain the adjustment qualification signal from the prediction module and calculate the adjustment processing value accordingly; Step 7: Upon receiving the unqualified adjustment signal from the prediction module, compensate for the adjustment value.

2. The high-sealing, high-precision spiral bevel gear contact pattern design method according to claim 1, characterized in that, In step 2, the number of teeth, module, pressure angle, helix angle, tooth width, direction of rotation, shaft intersection angle and grinding wheel diameter of the adjustment card and reference page are obtained, and the difference is calculated. Then, all the differences are added together to obtain the error value CW. Compare the error value CW with the error threshold; If the value is less than the specified value, a quality pass signal for the spiral bevel gear is generated. If the value is greater than 1, a signal indicating that the spiral bevel gear is of substandard quality will be generated.

3. The high-sealing, high-precision spiral bevel gear contact pattern design method according to claim 1, characterized in that, In step 3, the parameter data of the pinion is obtained, which includes the concave surface area of ​​the pinion, the convex surface area of ​​the pinion, the length coefficient, and the width coefficient, and are marked as OB, IB, Lp, and Kp respectively; Through formula In the calculation, the value of the midpoint spot Xb is obtained; a1, a2, a3, and a4 are weighting coefficients.

4. The high-sealing, high-precision spiral bevel gear contact pattern design method according to claim 1, characterized in that, The obtained midpoint spot value Xb is compared with the midpoint spot threshold. If it is greater than that, an adjustment signal is generated; If it is less than, generate an unadjusted signal.

5. The high-sealing, high-precision spiral bevel gear contact pattern design method according to claim 1, characterized in that, Step 4 includes: The pinion length coefficient Lp, pinion width coefficient Kp, pinion length standard coefficient Lpb, and pinion width standard coefficient Kpb are obtained. The difference between the pinion length coefficient Lp and the pinion length standard coefficient Lpb is calculated to obtain the length coefficient difference CLp. Similarly, the difference between the pinion width coefficient Kp and the pinion width standard coefficient Kpb is calculated to obtain the width coefficient difference CKp. Substitute the obtained length coefficient difference CLp and width coefficient difference CKp into the formula. In the calculation, the gross deviation value Zpc is obtained; where b1 and b2 are both proportionality coefficients; Set coarse adjustment coefficients and label them as KC. j ; j = 1, 2, ..., w; each coarse adjustment coefficient corresponds to a coarse deviation range value, namely (Wc1, Wc2], (Wc2, Wc3], ..., (Wc w Wc w+1 ]; and Wc1 < Wc2 < ... < Wc w <Wc w+1 ; When the gross deviation value Zpc∈(Wc) w Wc w+1 When [the value is], the coarse adjustment factor is KC. w .

6. The high-sealing, high-precision spiral bevel gear contact pattern design method according to claim 1, characterized in that, Step 4 also includes: Obtain the convex face diagonal coefficient Axt, the concave face diagonal coefficient Axa, and the convex face diagonal standard coefficient Axtb and the concave face diagonal standard coefficient Axab; The difference between the convex face diagonal coefficient Axt and the convex face diagonal standard coefficient Axtb is calculated to obtain the length coefficient difference CAxt. Similarly, the difference between the concave face diagonal coefficient Axa and the concave face diagonal standard coefficient Axab is calculated to obtain the concave face coefficient difference CAxa. Substitute the obtained length coefficient difference CAxt and concave surface coefficient difference CAxa into the formula. In the calculation, the fine deviation value Zpx is obtained; where c1 and c2 are both proportionality coefficients; Set fine adjustment coefficients and label them KX respectively. j ; j = 1, 2, ..., w; each fine adjustment coefficient corresponds to a fine deviation range value, namely (Wx1, Wx2], (Wx2, Wx3], ..., (Wx w Wx w+1 ]; and Wx1 < Wx2 < ... < Wx w <Wx w+1 ; When the fine deviation value Zpx∈(Wx) w Wx w+1 When [the value is] , the fine adjustment factor is KX. w .

7. The high-sealing, high-precision spiral bevel gear contact pattern design method according to claim 1, characterized in that, It also includes the following steps: The coarse adjustment coefficient obtained from the coarse adjustment submodule is KC. w The standard coefficients for pinion length (Lpb) and pinion width (Kpb) are used; and the coarse adjustment coefficient for the fine adjustment submodule is KX. w And the standard coefficient of the convex face diagonal Axtb, and the standard coefficient of the concave face diagonal Axab; Through formula The predicted value XYb of the central spot is calculated; where d1 and d2 are both scaling factors. The predicted value XYb of the center spot is compared with the midpoint spot threshold. If it is greater than that, an adjustment failure signal is generated; If it is less than, an adjustment pass signal is generated.

8. The high-sealing, high-precision spiral bevel gear contact pattern design method according to claim 7, characterized in that, It also includes the following steps: The coarse adjustment coefficient obtained from the coarse adjustment submodule is KC. w And the standard coefficients for pinion length Lpb and pinion width Kpb, through the formula The coarse adjustment value ZC is calculated.

9. The high-sealing, high-precision spiral bevel gear contact pattern design method according to claim 8, characterized in that, The coarse adjustment coefficient obtained from the fine adjustment submodule is KX. w The standard coefficients of the convex face diagonal, Axtb and the standard coefficients of the concave face diagonal, are obtained through the formula... The fine adjustment value ZX is calculated.

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