CN118513613A - Gear tooth deformation compensation processing method for press-fitting gear - Google Patents
Gear tooth deformation compensation processing method for press-fitting gear Download PDFInfo
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Abstract
The invention provides a method for compensating and processing the deformation of gear teeth of a press-fit gear, which provides a processing mode for compensating and processing the deformation of the gear teeth of the press-fit gear. By controlling the grinding precision of the inner hole reference, the influence on the consistency of the tooth profile inclination error fH2alpha is reduced. The specific compensation magnitude and precision of the gear tooth parameters are determined by the gear tooth deformation compensation magnitude determining method. Through proper environment and alignment clamping inspection requirements, the production error is reduced in the production preparation process. By adjusting parameters such as tooth profile inclination deviation fHalpha, tooth profile shape deviation ff alpha and the like, the deformation anti-compensation precision of the gear teeth is ensured. By controlling the interference and selecting a proper assembly method, the influence of the change of the interference on the magnitude of the tooth profile inclination error fH2alpha is reduced. According to the multi-wheel production practice, proper machining processes and parameters are selected, and the machining of the parts is ensured to meet the design requirements.
Description
Technical Field
The invention belongs to the field of data machining, and particularly relates to a gear tooth deformation compensation machining method for a press-fit gear.
Background
The gear is an important transmission part of the aeroengine, wherein part of the duplex gears are limited by the design space and cannot adopt an integrated structure, and the gear teeth parameter precision is ensured by adopting a mode that the gear shaft and the gear are firstly singly ground and then assembled in an interference mode.
For gears which are connected to the shaft by interference fit, after pressure fit (press fit for short), the gear teeth can generate expansion deformation due to the existence of interference, so that the total deviation of tooth profile, tooth thickness and other parameter precision are affected, and the gear teeth precision is reduced to different degrees along with the difference of the interference, specification and the like, so that the transmission stability is affected.
Disclosure of Invention
The invention provides a gear tooth deformation compensation processing method for a press-fit gear, which is used for solving the problem that parameters such as total tooth profile deviation, tooth thickness and the like of a high-precision gear are unqualified after press-fit. Especially for small-specification high-precision gears with gear teeth not ground after nitriding, the comprehensive deformation of nitriding and press fitting can be effectively controlled, and the parameter precision requirement of the gear teeth is ensured. The method is also suitable for the deformation compensation of nitriding.
The invention provides a gear tooth deformation compensation processing method for a press-fit gear, which comprises the following steps:
s1, setting the temperature of a processing environment within a preset temperature range;
s2, preheating a gear grinding machine until the temperature of the machine tool is stable;
S3, mounting the gear to be finished on a gear grinding clamp, aligning the pitch circle runout of the gear teeth to be processed by using a copper bar or an aluminum bar, and repeatedly fine-adjusting until the runout is smaller than 0.01mm;
S4, determining the diameter of the compensated addendum circle, the diameter of the root circle and the common normal line size according to the gear tooth deformation compensation value of the gear sample, and inputting the diameter of the compensated addendum circle, the diameter of the root circle and the common normal line size into gear grinding parameters of a gear grinding machine; the gear tooth deformation compensation value of the gear sample further comprises: profile shape deviation ff alpha, profile tilt deviation fH alpha;
S5, centering a grinding wheel of the gear grinding machine, and performing trial grinding on the gear to be finished by one tooth after the centering of the grinding wheel is completed;
s6, measuring the tooth after trial grinding according to the diameter of the measuring starting point and the diameter of the measuring end point of the gear sample to obtain tooth profile inclination deviation fH alpha and tooth profile shape deviation ff alpha of the tooth after trial grinding;
S7, executing S5 and S6 for a plurality of times until the left and right tooth profile inclination deviation fH alpha is within the corresponding gear tooth deformation compensation value + -0.001 to +0.002mm when the tooth after trial grinding is in the common normal line size after compensation, and trial grinding the rest teeth of the gear to be finished when the left and right tooth profile shape deviation ff alpha is within 0.002 mm.
Optionally, the method further comprises:
according to the actual value of the fit inner hole of the gear after trial grinding, the fit outer diameter of the gear shaft is matched and ground, the interference tolerance of the gear and the gear shaft is controlled to be not more than 0.008mm, and the influence of the change of the interference on the magnitude of the tooth profile inclination error fHalpha is reduced.
Optionally, the method further comprises:
the gears are assembled on the gear shafts by adopting pressure assembly, 3 positions are uniformly distributed on the circumference for press mounting, every 120 degrees of angle is converted, the press-fit is ensured, and a 0.02mm clearance gauge for checking the joint surface is not needed;
Measuring the actual values of the tooth top circle diameter, the tooth root circle diameter, the common normal line size, the tooth profile shape deviation ff alpha and the tooth profile inclination deviation fH alpha of the pressed gear teeth;
and according to the difference value between the actual value and the design value, regulating to obtain the latest gear deformation compensation value of the gear sample.
Optionally, the method further comprises:
and carrying out batch processing on the gears to be finished according to the latest gear deformation compensation value of the gear sample.
Optionally, the method further comprises:
s101, aligning a reference end face of a sample gear and a gear tooth circle-dividing runout within 0.005mm, and grinding a reference inner hole of the sample gear;
s102, setting internal grinding parameters of an internal grinding machine tool;
S103, carrying out reference processing on the aligned sample gear until the gear tooth pitch circle runout is smaller than 0.01mm, and reducing the influence on the consistency of the inclination error fH2alpha of each tooth profile of the gear;
S104, setting the temperature of the processing environment within a preset temperature range;
s105, preheating a gear grinding machine until the temperature of the machine tool is stable;
S106, mounting the gear sample on a gear grinding clamp, aligning the pitch circle runout of the gear sample by using a copper rod or an aluminum rod, and repeatedly fine-adjusting until the runout is smaller than 0.01mm;
s107, setting machine tool parameters of a gear grinding machine, and grinding a gear tooth sample on the gear grinding machine to obtain a gear sample to be assembled;
S108, measuring a gear sample to be assembled to obtain actual values of the tooth top circle diameter, the tooth root circle diameter, the common normal line size, the tooth profile shape deviation ff alpha and the tooth profile inclination deviation fH alpha of the gear teeth before assembly;
S109, according to the actual value of the fit inner hole of the gear sample to be assembled, the fit outer diameter of the gear shaft is matched and ground, the interference tolerance of the gear and the gear shaft is controlled to be not more than 0.008mm, and the influence of the change of the interference on the tooth profile inclination error fHalpha value is reduced;
s110, assembling a gear sample to be assembled on a gear shaft by adopting pressure assembly, uniformly distributing 3 positions on the circumference for press-fitting, switching an angle every 120 degrees, ensuring press-fitting, and checking that a 0.02mm clearance gauge of an attaching surface is not needed;
S111, measuring the actual value of tooth profile inclination deviation fH alpha of tooth top circle diameter, tooth root circle diameter, common normal line size and tooth profile shape deviation ff alpha of the pressed gear teeth;
And S112, obtaining gear tooth deformation compensation values of the diameter of the addendum circle, the diameter of the root circle, the common normal line size, the tooth profile shape deviation ff alpha and the tooth profile inclination deviation fH alpha according to the difference between the actual values before and after the press fitting measured in the steps S108 and S111.
Alternatively, the preset temperature range is 22±3 ℃.
Optionally, the machine tool parameters include: basic parameters of gear teeth, parameters of a finishing grinding wheel of a machine tool and machining parameters of gear grinding of the machine tool.
Optionally, the reference processing for the aligned sample gear includes:
and performing reference processing on the aligned sample gear by adopting a grinding stopping mode.
The invention provides a method for compensating and processing the deformation of gear teeth of a press-fit gear, which provides a processing mode for compensating and processing the deformation of the gear teeth of the press-fit gear. By controlling the grinding precision of the inner hole reference, the influence on the consistency of the tooth profile inclination error fH2alpha is reduced. The specific compensation magnitude and precision of the gear tooth parameters are determined by the gear tooth deformation compensation magnitude determining method. Through proper environment and alignment clamping inspection requirements, the production error is reduced in the production preparation process. By adjusting parameters such as tooth profile inclination deviation fHalpha, tooth profile shape deviation ff alpha and the like, the deformation anti-compensation precision of the gear teeth is ensured. By controlling the interference and selecting a proper assembly method, the influence of the change of the interference on the magnitude of the tooth profile inclination error fH2alpha is reduced. According to the multi-wheel production practice, proper machining processes and parameters are selected, and the machining of the parts is ensured to meet the design requirements.
Detailed Description
The present invention will be specifically described with reference to examples below in order to make the objects and advantages of the present invention more apparent. The following text is provided to describe only one or more specific embodiments of the present invention and does not limit the scope of the invention strictly as specifically claimed.
The invention provides a gear tooth deformation compensation processing method for a press-fit gear, which specifically comprises the following steps:
Control of reference grinding precision of inner hole
Step one, before machining, aligning a gear reference end surface and gear tooth circle run-out within 0.005, grinding a reference inner hole, and controlling the consistency of the aperture size;
Setting internal grinding parameters of the machine tool, wherein the grinding process comprises three stages of coarse grinding, fine grinding and polishing. And each stage adopts a grinding stopping mode. The parameters mainly comprise the linear speed of the grinding wheel, the rotating speed of the part, the feeding amount and the frequency of the finishing grinding wheel.
And thirdly, after processing, checking that the pitch circle runout of the gear teeth on the hanger is smaller than 0.01mm, and reducing the influence on the consistency of the inclination error fHalpha of each tooth profile of the gear.
(II) determination of tooth deformation Compensation value
Step one, selecting a proper temperature of a processing environment, wherein the temperature is about 22 ℃. The temperature should not be too high or too low while ensuring that the ambient temperature fluctuates by no more than 3 ℃.
And secondly, preheating the gear grinding machine, stabilizing the temperature of the standby bed, and ensuring that the gear grinding machine can be produced after all the processes have no problems.
Step three, mounting a sample gear to be finished on a gear grinding clamp, aligning the pitch circle runout of the gear teeth to be processed by using a copper bar or an aluminum bar, and repeatedly fine-adjusting until the runout is smaller than 0.01mm;
setting machine tool parameters, namely setting basic parameters of gear teeth, finishing grinding wheel parameters of the machine tool and grinding machining parameters of the machine tool in sequence, and then grinding the gear teeth normally on a gear grinding machine according to the precision requirements of all parameters of a design pattern;
measuring gear tooth parameters, and measuring actual values of the gear tooth top circle diameter, the gear root circle diameter, the common normal line size, the gear profile shape deviation ff alpha and the gear profile inclination deviation fH alpha before assembly;
And step six, according to the actual value of the fit inner hole of the sample gear, the fit outer diameter of the gear shaft is matched and ground, and the actual value of the interference is recorded. The interference is controlled within the range of the lower difference value in the design requirement value, the tolerance is controlled within 0.008, and the influence of the variation of the interference on the tooth profile inclination error fHalpha value is reduced;
And seventhly, assembling the sample gear onto the gear shaft by adopting pressure assembly, wherein the assembly parameters mainly comprise assembly pressure, assembly speed and lubricating medium. 3 positions are uniformly distributed on the circumference for press fitting, every 120 degrees of angle is converted, press fitting is guaranteed, and a 0.02mm clearance gauge for checking the joint surface is not needed;
And step eight, measuring the actual values of the diameter of the top circle, the diameter of the root circle, the common normal line size, the tooth profile shape deviation ff alpha and the tooth profile inclination deviation fH alpha of the assembled sample gear. And analyzing and calculating to obtain the tooth top diameter, tooth root diameter, common normal line size, tooth profile shape deviation ff alpha, tooth profile inclination tolerance fH alpha deformation trend and deformation through the measured difference between the actual values before and after press fitting, and taking the reverse value as the gear tooth deformation compensation value as the deformation compensation requirement of the gear grinding process.
(III) gear grinding procedure gear tooth parameter back compensation
Step one, preparation before machining and parameter setting, wherein the preparation before grinding and the tooth grinding parameter setting are determined according to the gear tooth deformation compensation value. When the grinding parameters are set, the parameters are input into a gear grinding machine according to the compensated tooth top circle diameter, tooth root circle diameter and common normal line size;
Step two, grinding a tooth;
And (3) centering the grinding wheel, performing trial grinding on the tooth after the grinding wheel is centered, and marking the tooth. After the tooth is ground, the tooth is measured, and the requirements of tooth profile inclination deviation fH alpha, tooth profile shape deviation ff alpha and the like during grinding are continuously adjusted according to the measurement result until the deformation compensation precision requirement is met, so that the subsequent processing can be carried out. Measurement and adjustment principle:
(1) Measuring and evaluating the end point diameter (the difference between the diameter of the addendum circle and the 2 times of addendum chamfer value) according to the uniform value requirement;
(2) Measuring and evaluating the diameter of the starting point (which is not more than the diameter of the involute starting circle) according to the requirement of a unified value, and setting the diameter as close to the unified value of the diameter of the base circle as possible according to actual requirements;
(3) Adjusting left and right tooth profile inclination deviation fHα to control the deformation counter compensation value within a range of minus 0.001 to plus 0.002 when the gear teeth enter a common normal line size tolerance;
(4) Adjusting the left and right tooth profile shape deviation ff alpha to be within 0.002;
and thirdly, grinding all the teeth in a trial mode, and grinding all the teeth after one tooth in the trial mode is qualified. When the full tooth is ground, the grinding parameters should be consistent with the parameters when one tooth is ground.
And step four, after the first part is processed, measuring according to parameter requirements after deformation compensation, and processing a subsequent gear after the first part is qualified.
(IV) interference control and pressure fitting
Firstly, carrying out mating grinding, wherein the tolerance is controlled to be not more than 0.008 in the range of a lower difference value in a design requirement value according to the actual value of a mating inner hole of a gear and the mating outer diameter of a mating grinding shaft, so that the influence of the change of the tolerance on the magnitude of the tooth profile inclination error fHalpha is reduced;
And step two, assembling the gear on the shaft by adopting pressure assembly, wherein the assembling parameters mainly comprise assembling pressure, assembling speed and lubricating medium. 3 positions are uniformly distributed on the circumference for press fitting, every 120 degrees of angle is converted, press fitting is guaranteed, and a 0.02mm clearance gauge for checking the joint surface is not needed;
And thirdly, measuring gear tooth parameters, and finally measuring actual values of gear tooth top circle diameter, gear root circle diameter, common normal line size, total tooth profile deviation Falpha and total spiral line deviation Fbeta according to design pattern requirements. The magnitude of the deformation inverse compensation can be fine-tuned according to the final result.
By adopting the method for processing the deformation compensation of the gear teeth of the press-fit gear, which is provided by the invention, the gear tooth profile parameters of the press-fit gear which are not ground after nitriding can meet the precision requirements of the gear tooth parameters.
Taking a certain press-mounting pinion as an example, the gear is required to meet the requirements that the total deviation Fα of tooth profile is not more than 0.006, the total deviation Fβ of spiral line is not more than 0.007 and the common normal length is 19.48 (-0.06/-0.13) after nitriding and press-mounting. The method comprises the following specific steps:
Control of reference grinding precision of inner hole
Step one, before machining, aligning a gear reference end surface and gear tooth circle run-out within 0.005, grinding a reference inner hole, and controlling the consistency of the aperture size;
Setting internal grinding parameters of the machine tool, wherein the grinding process comprises three stages of coarse grinding, fine grinding and polishing. And each stage adopts a grinding stopping mode. The parameters mainly comprise the linear speed of the grinding wheel of 30m/s, the rotating speed of the part of 150r/min, the dressing feed speed of the grinding wheel of 40-50mm/min, the single dressing upper cutter amount of 0.002-0.004mm and the reciprocating times of the grinding wheel of 6-8 times.
And thirdly, after processing, checking that the pitch circle runout of the gear teeth on the hanging rack is smaller than 0.01mm.
(II) determination of tooth deformation Compensation value
Step one, selecting a proper temperature of a processing environment, wherein the temperature is about 22 ℃. The temperature should not be too high or too low while ensuring that the ambient temperature fluctuates by no more than 3 ℃.
And secondly, preheating the gear grinding machine, stabilizing the temperature of the standby bed, and ensuring that the gear grinding machine can be produced after all the processes have no problems.
Step three, clamping and aligning the gears, mounting the parts on a special tool, aligning the gear teeth with a copper bar or an aluminum bar to index circle runout, and repeatedly fine-adjusting until the runout is smaller than 0.01;
Setting machine tool parameters, namely setting gear tooth basic parameters (the number of teeth is 15, the modulus is 2.5, the pressure angle is 20 degrees, the diameter of a tooth top circle is 43.98, the initial involute circle is 35.35, the common normal line size is 19.38, the cross-tooth number is 3), machine tool dressing grinding wheel parameters (dressing feed rate is 0.06mm/str, grinding wheel linear speed is 30m/s, speed-0.8, track-related feed rate is 350-400 mm/min), machine tool gear grinding machining parameters (coarse grinding linear speed is 30m/s, coarse grinding feed rate is 0.011, coarse grinding feed rate is 1700mm/min, coarse grinding dressing grinding wheel frequency is 7, semi-finishing linear speed is 30m/s, semi-finishing feed rate is 0.01, semi-finishing dressing wheel frequency is 7, finishing linear speed is 30m/s, finishing feed rate is 0.005, finishing feed rate is 1500mm/min, finishing dressing wheel frequency is 5, optical grinding linear speed is 30m/s, optical grinding feed rate is 0.005, optical grinding feed rate is 1000mm/min, optical dressing wheel frequency is 5), and then designing the gear teeth according to the pattern grinding machine tool gear grinding parameters to normal gear grinding wheel accuracy;
Measuring gear tooth parameters, namely measuring the top circle chord length 43.62, the root circle chord length 32.6, the common normal line size 19.40, the tooth profile deviation 0.0034, the tooth profile inclination deviation +0.0067 and the total spiral line deviation 0.0026 of the gear teeth before assembly;
Step six, carrying out mating grinding, namely recording the actual value of the interference as +0.081 according to the actual value of the mating inner hole of the gear and the mating outer diameter of the mating gear shaft;
And step seven, assembling the gear on the gear shaft by adopting pressure assembly, wherein the assembling parameters mainly comprise the assembling pressure of 1MPa, the assembling speed of 2mm/s and the lubricating medium of lanolin. 3 positions are uniformly distributed on the circumference for press fitting, every 120 degrees of angle is converted, press fitting is guaranteed, and a 0.02mm clearance gauge for checking the joint surface is not needed;
And step eight, measuring deformation and calculating compensation values, and measuring the tooth top circle chord length 43.65, the tooth root circle chord length 32.62, the common normal line size 19.43, the tooth profile deviation 0.0040, the tooth profile inclination deviation +0.0218 and the spiral line total deviation 0.004 of the assembled gear teeth. The deformation of the addendum circle is 0.03, the deformation of the dedendum circle is 0.02, the deformation of the common normal line is 0.03, the deformation of the tooth profile inclination tolerance fHα is +0.0151, and the reverse values of-0.03, -0.02, -0.03 and-0.015 are respectively taken as the deformation compensation values of the gear teeth, and are used as the deformation countercompensation requirements of the gear grinding process.
(III) gear grinding procedure gear tooth parameter back compensation
Step one, preparation before machining and parameter setting, namely finishing preparation before grinding and grinding parameter setting according to the step one to the step four of the gear tooth deformation compensation value determining method. When the grinding parameters are set, the compensating gear tip diameter 43.62, the compensating gear root diameter 32.6 and the common normal line size 19.37 are input into a gear grinding machine;
Step two, grinding the first tooth in a trial mode, centering the grinding wheel after parameter setting is completed, grinding the first tooth in a trial mode after centering the grinding wheel, and marking the first tooth. After the tooth is ground, the tooth is measured, and the requirements of tooth profile inclination deviation fH alpha, tooth profile shape deviation ff alpha and the like during grinding are continuously adjusted according to the measurement result until the deformation compensation precision requirement is met, so that the subsequent processing can be carried out. Measurement and adjustment:
(1) Measuring and evaluating the diameter of the end point according to the requirement of a unified value phi 43.3;
(2) The diameter of the measurement and evaluation starting point is required to be a uniform value phi 35.35;
(3) Adjusting left and right tooth profile inclination deviation fHalpha to ensure that when the gear teeth enter common normal dimensional tolerance, the comprehensive nitriding deformation is compensated by-0.002 to-0.003 and controlled to be-0.016 to-0.019;
(4) Adjusting the left and right tooth profile shape deviation ff alpha to be within 0.002;
and thirdly, grinding all the teeth in a trial mode, and grinding all the teeth after one tooth in the trial mode is qualified. When the full tooth is ground, the grinding parameters should be consistent with the parameters when one tooth is ground.
And step four, after the first part is processed, measuring according to parameter requirements after deformation compensation, and processing the subsequent gear after the qualified gear.
(IV) interference control and pressure fitting
Firstly, carrying out mating grinding, wherein the tolerance is controlled to be not more than 0.008 in the range of a lower difference value in a design requirement value according to the actual value of a mating inner hole of a gear and the mating outer diameter of a mating shaft;
Step two, assembling the gear on the shaft by adopting pressure assembly, wherein the assembling parameters mainly comprise the assembling pressure of 1MPa, the assembling speed of 2mm/s and the lubricating medium lanolin. 3 positions are uniformly distributed on the circumference for press fitting, every 120 degrees of angle is converted, press fitting is guaranteed, and a 0.02mm clearance gauge for checking the joint surface is not needed;
And thirdly, measuring gear tooth parameters, and finally measuring actual values of gear tooth top circle diameter, gear root circle diameter, common normal line size, total tooth profile deviation Falpha and total spiral line deviation Fbeta according to design pattern requirements.
The measured gear tooth tip diameter phi 43.65, root diameter phi 32.62, common normal dimension 19.4, and total tooth profile deviation 0.0049. And finally, judging that the machined gear is qualified in precision.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention. Structures, devices and methods of operation not specifically described and illustrated herein, unless otherwise indicated and limited, are implemented according to conventional means in the art.
Claims (8)
1. The gear tooth deformation compensation processing method for the press-fit gear is characterized by comprising the following steps of:
s1, setting the temperature of a processing environment within a preset temperature range;
s2, preheating a gear grinding machine until the temperature of the machine tool is stable;
S3, mounting the gear to be finished on a gear grinding clamp, aligning the pitch circle runout of the gear teeth to be processed by using a copper bar or an aluminum bar, and repeatedly fine-adjusting until the runout is smaller than 0.01mm;
S4, determining the diameter of the compensated addendum circle, the diameter of the root circle and the common normal line size according to the gear tooth deformation compensation value of the gear sample, and inputting the diameter of the compensated addendum circle, the diameter of the root circle and the common normal line size into gear grinding parameters of a gear grinding machine; the gear tooth deformation compensation value of the gear sample further comprises: profile shape deviation ff alpha, profile tilt deviation fH alpha;
S5, centering a grinding wheel of the gear grinding machine, and performing trial grinding on the gear to be finished by one tooth after the centering of the grinding wheel is completed;
s6, measuring the tooth after trial grinding according to the diameter of the measuring starting point and the diameter of the measuring end point of the gear sample to obtain tooth profile inclination deviation fH alpha and tooth profile shape deviation ff alpha of the tooth after trial grinding;
S7, executing S5 and S6 for a plurality of times until the left and right tooth profile inclination deviation fH alpha is within the corresponding gear tooth deformation compensation value + -0.001 to +0.002mm when the tooth after trial grinding is in the common normal line size after compensation, and trial grinding the rest teeth of the gear to be finished when the left and right tooth profile shape deviation ff alpha is within 0.002 mm.
2. The method for compensating for the deformation of the gear teeth of a press-fit gear according to claim 1, characterized in that the method further comprises:
according to the actual value of the fit inner hole of the gear after trial grinding, the fit outer diameter of the gear shaft is matched and ground, the interference tolerance of the gear and the gear shaft is controlled to be not more than 0.008mm, and the influence of the change of the interference on the magnitude of the tooth profile inclination error fHalpha is reduced.
3. The method for compensating for the deformation of the gear teeth of a press-fit gear according to claim 2, characterized in that the method further comprises:
the gears are assembled on the gear shafts by adopting pressure assembly, 3 positions are uniformly distributed on the circumference for press mounting, every 120 degrees of angle is converted, the press-fit is ensured, and a 0.02mm clearance gauge for checking the joint surface is not needed;
Measuring the actual values of the tooth top circle diameter, the tooth root circle diameter, the common normal line size, the tooth profile shape deviation ff alpha and the tooth profile inclination deviation fH alpha of the pressed gear teeth;
and according to the difference value between the actual value and the design value, regulating to obtain the latest gear deformation compensation value of the gear sample.
4. The method for compensating for the deformation of the gear teeth of a press-fit gear according to claim 3, characterized in that the method further comprises:
and carrying out batch processing on the gears to be finished according to the latest gear deformation compensation value of the gear sample.
5. The method for compensating for the deformation of the gear teeth of a press-fit gear according to claim 1, characterized in that the method further comprises:
s101, aligning a reference end face of a sample gear and a gear tooth circle-dividing runout within 0.005mm, and grinding a reference inner hole of the sample gear;
s102, setting internal grinding parameters of an internal grinding machine tool;
S103, carrying out reference processing on the aligned sample gear until the gear tooth pitch circle runout is smaller than 0.01mm, and reducing the influence on the consistency of the inclination error fH2alpha of each tooth profile of the gear;
S104, setting the temperature of the processing environment within a preset temperature range;
s105, preheating a gear grinding machine until the temperature of the machine tool is stable;
S106, mounting the gear sample on a gear grinding clamp, aligning the pitch circle runout of the gear sample by using a copper rod or an aluminum rod, and repeatedly fine-adjusting until the runout is smaller than 0.01mm;
s107, setting machine tool parameters of a gear grinding machine, and grinding a gear tooth sample on the gear grinding machine to obtain a gear sample to be assembled;
S108, measuring a gear sample to be assembled to obtain actual values of the tooth top circle diameter, the tooth root circle diameter, the common normal line size, the tooth profile shape deviation ff alpha and the tooth profile inclination deviation fH alpha of the gear teeth before assembly;
S109, according to the actual value of the fit inner hole of the gear sample to be assembled, the fit outer diameter of the gear shaft is matched and ground, the interference tolerance of the gear and the gear shaft is controlled to be not more than 0.008mm, and the influence of the change of the interference on the tooth profile inclination error fHalpha value is reduced;
s110, assembling a gear sample to be assembled on a gear shaft by adopting pressure assembly, uniformly distributing 3 positions on the circumference for press-fitting, switching an angle every 120 degrees, ensuring press-fitting, and checking that a 0.02mm clearance gauge of an attaching surface is not needed;
S111, measuring the actual value of tooth profile inclination deviation fH alpha of tooth top circle diameter, tooth root circle diameter, common normal line size and tooth profile shape deviation ff alpha of the pressed gear teeth;
And S112, obtaining gear tooth deformation compensation values of the diameter of the addendum circle, the diameter of the root circle, the common normal line size, the tooth profile shape deviation ff alpha and the tooth profile inclination deviation fH alpha according to the difference between the actual values before and after the press fitting measured in the steps S108 and S111.
6. The method for compensating for deformation of gear teeth of press-fit gears according to claim 1 or 5, wherein the preset temperature range is 22±3 ℃.
7. The method for compensating for the deformation of the gear teeth of a press-fit gear according to claim 5, characterized in that the machine tool parameters include: basic parameters of gear teeth, parameters of a finishing grinding wheel of a machine tool and machining parameters of gear grinding of the machine tool.
8. The method for compensating for deformation of gear teeth of press-fit gear according to claim 5, wherein said performing reference processing on the aligned sample gear comprises:
and performing reference processing on the aligned sample gear by adopting a grinding stopping mode.
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| CN202410736573.4A CN118513613A (en) | 2024-06-07 | 2024-06-07 | Gear tooth deformation compensation processing method for press-fitting gear |
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| CN202410736573.4A Pending CN118513613A (en) | 2024-06-07 | 2024-06-07 | Gear tooth deformation compensation processing method for press-fitting gear |
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| Country | Link |
|---|---|
| CN (1) | CN118513613A (en) |
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2024
- 2024-06-07 CN CN202410736573.4A patent/CN118513613A/en active Pending
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