CN103769692B - On-machine measuring device and method for pitch deviation of large gear - Google Patents
On-machine measuring device and method for pitch deviation of large gear Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/14—Measuring arrangements characterised by the use of mechanical techniques for measuring distance or clearance between spaced objects or spaced apertures
- G01B5/16—Measuring arrangements characterised by the use of mechanical techniques for measuring distance or clearance between spaced objects or spaced apertures between a succession of regularly spaced objects or regularly spaced apertures
- G01B5/166—Measuring arrangements characterised by the use of mechanical techniques for measuring distance or clearance between spaced objects or spaced apertures between a succession of regularly spaced objects or regularly spaced apertures of gear teeth
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Abstract
The utility model provides a large-scale gear pitch deviation is at quick-witted measuring device, includes the numerical control revolving stage of drive gear rotation and location, includes the radial numerical control slip table of drive indicator along gear radial motion, includes the axial numerical control slip table of drive indicator along gear axial motion, includes lathe electrical apparatus and numerical control system, still includes two amesdial indicators with the touching of flank of tooth. A method for measuring the pitch deviation of large gear on machine includes such steps as measuring the position of tooth surface, calculating the single pitch deviation, and calculating the cumulative pitch deviation. The method is completely based on the existing mechanical structure and control system of the gear processing machine tool, is simple and reliable, is convenient to operate, and can be used for measuring the pitch errors with low cost and high precision.
Description
Technical field
The invention belongs to gear error fields of measurement, be specifically related to a kind of large gear circular pitch deviation on-machine measurement apparatus and method.
Background technology
Large gear is mainly used in the key areas such as the energy, traffic, national defence, is the key components and parts of actuating device on wind-power electricity generation, large hydropower station nuclear power station, forging equipment and boats and ships. Large gear not only processing and manufacturing difficulty, and measuring also is a difficult problem. It is difficult to find that suitable three-coordinates measuring machine or gear measuring center measurement due to larger in size, and exists and measure the problem difficult unified with machining benchmark, so large gear is usually employing on-machine measurement method measurement.
Pitch error is an important indicator of the driving error of gear. A kind of method of on-machine measurement pitch error is to use turntable by a chaining pin and the touching of each flank of tooth, it is thus achieved that the revolving table position that each flank of tooth is corresponding, then calculates error. The coupled problem of turntable error of division when this method does not only exist processing and measures, and due to the radius amplification of large gear, the required precision of turntable is significantly high, and general lathe is difficult to reach. Another kind of on-machine measurement method is to use tooth pitch comparator block, and this instrument is independent of lathe, and price is expensive, and can only measure the relative value of circular pitch deviation, it is impossible to measure the absolute value of circular pitch deviation.
Summary of the invention
It is an object of the invention to provide a kind of large gear circular pitch deviation on-machine measurement apparatus and method, present invention is generally directed to the monodentate of large gear from tooth pitch class deviations such as inclined, tooth pitch cumulative departures, it is provided that on-machine measurement apparatus and method.
The present invention has the prominent advantages that: the certainty of measurement of the present invention is not by the impact of turntable precision, based on the existing mechanical part of gear cutting machine and digital control system, do not need extra TT&C system, measure cost ineffective rate high, it is possible to measure the absolute value of circular pitch deviation.Applied range of the present invention, it is possible in the upper use of all gear cutting machines (gear-hobbing machine, tooth milling machine and gear grinding machines etc.).
The technical scheme is that
A kind of large gear circular pitch deviation on-machine measurement device of the present invention, including numerical control rotating platform 2, lathe bed 6, radial numerical control slide unit 3, axial NC slide unit 4 and the indicator 5 with flank of tooth touching, also include electric device and digital control system, gear 1 clamping is on numerical control rotating platform 2, along with the C axle of numerical control rotating platform 2 moves together, indicator 5 Magnetic gauge stand is fixed on axial NC slide unit 4, along with the X-axis of radial numerical control slide unit 3 is moved together with the Z axis of axial NC slide unit 4, the X-axis of lathe, Z axis and the motion of C axle control by electric device and the digital control system of lathe.
Described indicator 5 is two amesdials.
A kind of large gear circular pitch deviation on-machine measurement method of the present invention,
A) step of indicator 5 erection is included:
A1, the gauge head of two indicators 5 is contacted with adjacent corresponding flanks, the area contact that the gauge head of indicator 5 is roughly the same on the flank of tooth with the flank of tooth;
A2, estimating tooth pitch cumulative departure size and turntable positioning precision, controlling indicator has enough pre compressed magnitudes;
The adjacent flank of tooth that a3 contacts with the gauge head of indicator 5 was generally in rotation of rotary table center and was parallel on the straight line of the radial numerical control slide unit direction of motion;
A4, indicator 5 the direction of motion of gauge head touching be approximately perpendicular to the flank of tooth of gear;
B) step measuring flank of tooth position is included:
Two indicators 5 have been set up in requirement in b1, foundation step a, make the gauge head of indicator 5 and right face, and the coordinate now recording turntable is C1, radial numerical control slide unit coordinate is X1。
B2, by numerical control rotating platform 2 along the gauge head of indicator 5 away from flank of tooth direction anglec of rotation Cm, make two indicators 5 disengage the flank of tooth. Cm=360/zg/ 8, mnFor normal module, β is spiral angle of graduated circle;
B3, by numerical control rotating platform 2 again along the gauge head of indicator 5 near flank of tooth direction anglec of rotation Cm, two indicators 5 will contact Tooth, the reading respectively v of two tables of record11R, v12R;
B4, by numerical control rotating platform 2 along the gauge head of indicator 5 away from flank of tooth direction anglec of rotation Cm, make two indicators 5 disengage the flank of tooth;
B5, by radial numerical control slide unit 3 along away from Gear axis direction move distance Xm, indicator 5 exits teeth groove, Xm=4*mn。
B6., numerical control rotating platform 2 is rotated forward angle 360/zg, zgFor number of gear teeth;
B7, by radial numerical control slide unit 3 along near gear 1 axis direction move distance Xm, indicator 5 enters teeth groove;
B8, by numerical control rotating platform 2 along the gauge head of indicator 5 near flank of tooth direction anglec of rotation Cm, make two indicator 5 contact Tooth. The reading respectively v of two indicators of record21R, v22R;
B9, repetition step b4 to step b8, the indicator 5 reading respectively v of recordi1R, vi2R, i=1,2 ..., zg;
B10, repetition step b1 are to step b9, and the left flank of tooth measured by frame table again, and recording indicator (5) reading is vi1L, vi2L, i=1,2 ..., zg;
C) calculation procedure of single circular pitch deviation is included:
C1, calculate right flank of tooth theory monodentate from corresponding indicator display difference, v210=sum{vi2R-vi1R,i=1,2,…,zg}/zg;
C2, calculate right flank of tooth list circular pitch deviation, fptiR=(vi2R-vi1R-v210)/cos(β),i=1,2,…zg, β is gear compound graduation circle helical angle;
C3, repetition step c1 and step c2 calculate left flank of tooth list circular pitch deviation fptiL;
D) calculation procedure of tooth pitch cumulative departure is included:
D1, calculate right flank of tooth list circular pitch deviation, FpiR=fpt1R+fpt2R+…+fptiR, i=1,2 ..., zg-1;
D2, repetition d1 calculate left flank of tooth list circular pitch deviation FpiL。
In described step a2, pre compressed magnitude is more than 3 times of total cumulative pitch error with the summation of turntable positioning precision corresponding teeth tip circle arc length.
The invention has the beneficial effects as follows:
The large gear circular pitch deviation on-machine measurement apparatus and method of the present invention are based entirely on the existing mechanical construction and control system of gear cutting machine, the measurement completing tooth pitch class error of low-cost and high-precision.
The impact that the certainty of measurement of the present invention is subject to turntable and radial numerical control slide unit positioning precision is little, and the precision of machine tool can meet measurement requirement completely.
The large gear circular pitch deviation on-machine measurement apparatus and method of the present invention can measure the absolute value of circular pitch deviation rather than relative value, and measurement result is more accurate.
The large gear circular pitch deviation on-machine measurement method of the present invention is simple and reliable, device is easy to operate, automaticity is high, and whole process can be realized by digital control system, and operator has only to read-record.
The large gear circular pitch deviation on-machine measurement method of the present invention can apply to all gear cutting machines, the advantage with applied range.
Accompanying drawing explanation
Fig. 1 is the on-machine measurement device schematic diagram of the present invention.
Fig. 2 measures the frame table method schematic diagram of indicator when starting.
The right flank of tooth measurement procedure schematic diagram step by step of Fig. 3.
In figure: 1 be gear, 2 be numerical control rotating platform, 3 be radial numerical control slide unit, 4 be axial NC slide unit, 5 be indicator, 6 for lathe bed.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described:
Fig. 1 show at machine tooth pitch measurement apparatus schematic diagram, and this device is made up of numerical control rotating platform 2, lathe bed 6, radial numerical control slide unit 3, axial NC slide unit 4, indicator 5 and electric device and digital control system etc. Gear 1 clamping is on numerical control rotating platform 2, along with the C axle of numerical control rotating platform 2 moves together. Indicator 5 Magnetic gauge stand is fixed on axial NC slide unit 4, along with the X-axis of radial numerical control slide unit 3 is moved together with the Z axis of axial NC slide unit 4. The X-axis of lathe, Z axis and the motion of C axle control by the digital control system of lathe.
Method erection indicator shown in Fig. 2 is needed before measurement starts. In order to improve certainty of measurement, it is necessary to satisfied requirement has: gauge head and area contact roughly the same on two flank of tooth; Two gauge heads have enough pre compressed magnitudes, it is to avoid occur during measurement that gauge head does not reach the situation of the flank of tooth; Two initial contact flank of tooth are about the substantially symmetric distribution of machine axis; When gauge head and flank of tooth touching, the direction of motion of gauge head is substantially vertical with the flank of tooth.
Then passing through programming G code numerical control program, control lathe measurement procedure shown in Fig. 3 and run, in Fig. 3, A, B, C represent 3 adjacent teeth respectively. Measurement procedure is as follows:
B1. measure shown in Fig. 2, before starting, set up two amesdial indicators, make the gauge head of indicator and right face. The coordinate recording now turntable is C1, radial numerical control slide unit coordinate is X1。
B2. turntable along gauge head away from flank of tooth direction anglec of rotation Cm, make two indicators disengage the flank of tooth. Cm=360/zg/ 8, mnFor normal module, β is spiral angle of graduated circle.
B3. turntable again along gauge head near flank of tooth direction anglec of rotation Cm, two indicators will contact Tooth, the reading respectively v of two tables of record11R, v12R. B2 and b3 is the random error reducing by first measured value.
B4. turntable along gauge head away from flank of tooth direction anglec of rotation Cm, make two indicators disengage the flank of tooth.
B5. radial numerical control slide unit is along away from Gear axis direction move distance Xm, indicator exits teeth groove.Xm=4*mn。
B6. turntable rotates forward angle 360/zg, zgFor number of gear teeth.
B7. radial numerical control slide unit is along near Gear axis direction move distance Xm, indicator enters teeth groove.
B8. turntable along gauge head near flank of tooth direction anglec of rotation Cm, make two indicator contact Tooth. The reading respectively v of two indicators of record21R, v22R。
Then step b4 to step b8, the indicator display of record respectively v are repeatedi1R, vi2R, i=1,2 ..., zg. Same method can again be set up indicator and be measured the left flank of tooth, and recording indicator display is vi1L, vi2L, i=1,2 ..., zg。
B8, the indicator display of record respectively vi1R, vi2R, c1. first calculates right flank of tooth theory monodentate from corresponding indicator display difference, v210=sum{vi2R-vi1R,i=1,2,…,zg}/zg。
C2. right flank of tooth list circular pitch deviation, f are then calculatedptiR=(vi2R-vi1R-v210)/cos(β),i=1,2,…zg. β is gear compound graduation circle helical angle.
C3. repeat c1 and c2 and calculate left flank of tooth list circular pitch deviation fptiL。
D1. right flank of tooth list circular pitch deviation, F are calculatedpiR=fpt1R+fpt2R+…+fptiR, i=1,2 ..., zg-1。
D2. repeat d1 and calculate left flank of tooth list circular pitch deviation FpiL。
Embodiment described above is only that the preferred embodiment of the present invention is described; not the spirit and scope of the present invention are defined; without departing under design concept premise of the present invention; various modification that in this area, technical scheme is made by ordinary skill technical staff and improvement; all should falling into protection scope of the present invention, the technology contents that the present invention is claimed all is recorded in detail in the claims.
Claims (3)
1. a large gear circular pitch deviation on-machine measurement device, it is characterized in that including numerical control rotating platform (2), lathe bed (6), radial numerical control slide unit (3), axial NC slide unit (4) and the indicator (5) with flank of tooth touching, also include electric device and digital control system, gear (1) clamping is on numerical control rotating platform (2), along with the C axle of numerical control rotating platform (2) moves together, indicator (5) Magnetic gauge stand is fixed on axial NC slide unit (4), along with the X-axis of radial numerical control slide unit (3) is moved together with the Z axis of axial NC slide unit (4), the X-axis of lathe, Z axis and the motion of C axle control by the electric device of lathe and digital control system, described indicator (5) is two amesdials.
2. a large gear circular pitch deviation on-machine measurement method, is characterized in that:
A) step that indicator (5) is set up is included:
A1, the gauge head of two indicators (5) is contacted with adjacent corresponding flanks, the area contact that the gauge head of indicator (5) is roughly the same on the flank of tooth with the flank of tooth;
A2, estimating tooth pitch cumulative departure size and turntable positioning precision, controlling indicator has enough pre compressed magnitudes;
The adjacent flank of tooth that a3 contacts with the gauge head of indicator (5) was generally in rotation of rotary table center and was parallel on the straight line of the radial numerical control slide unit direction of motion;
A4, indicator (5) the direction of motion of gauge head touching be approximately perpendicular to the flank of tooth of gear;
B) step measuring flank of tooth position is included:
Two indicators (5) have been set up in requirement in b1, foundation step a, make the gauge head of indicator (5) and right face, and the coordinate now recording turntable is C1, radial numerical control slide unit coordinate is X1;
B2, by numerical control rotating platform (2) along the gauge head of indicator (5) away from flank of tooth direction anglec of rotation Cm, make two indicators (5) disengage the flank of tooth; Cm=360/zg/ 8, mnFor normal module, β is spiral angle of graduated circle;
B3, by numerical control rotating platform (2) again along the gauge head of indicator (5) near flank of tooth direction anglec of rotation Cm, two indicators (5) will contact Tooth, the reading respectively v of two tables of record11R, v12R;
B4, by numerical control rotating platform (2) along the gauge head of indicator (5) away from flank of tooth direction anglec of rotation Cm, make two indicators (5) disengage the flank of tooth;
B5, by radial numerical control slide unit (3) along away from Gear axis direction move distance Xm, indicator (5) exits teeth groove, Xm=4*mn;
B6., numerical control rotating platform (2) is rotated forward angle 360/zg, zgFor number of gear teeth;
B7, by radial numerical control slide unit (3) along near gear (1) axis direction move distance Xm, indicator (5) enters teeth groove;
B8, by numerical control rotating platform (2) along the gauge head of indicator (5) near flank of tooth direction anglec of rotation Cm, make two indicator (5) contact Tooth; The reading respectively v of two indicators of record21R, v22R;
B9, repetition step b4 to step b8, indicator (5) the reading respectively v of recordi1R, vi2R, i=1,2 ..., zg;
B10, repetition step b1 are to step b9, and the left flank of tooth measured by frame table again, and recording indicator (5) reading is vi1L, vi2L, i=1,2 ..., zg;
C) calculation procedure of single circular pitch deviation is included:
C1, calculate right flank of tooth theory monodentate from corresponding indicator display difference, v210=sum{vi2R-vi1R, i=1,2 ..., zg}/zg;
C2, calculate right flank of tooth list circular pitch deviation, fptiR=(vi2R-vi1R-v210)/cos (β), i=1,2 ... zg, β is gear compound graduation circle helical angle;
C3, repetition step c1 and step c2 calculate left flank of tooth list circular pitch deviation fptiL;
D) calculation procedure of tooth pitch cumulative departure is included:
D1, calculate right flank of tooth list circular pitch deviation, FpiR=fpt1R+fpt2R+…+fptiR, i=1,2 ..., zg-1;
D2, repetition d1 calculate left flank of tooth list circular pitch deviation FpiL。
3. large gear circular pitch deviation on-machine measurement method according to claim 2, is characterized in that pre compressed magnitude in described step a2 is more than 3 times of total cumulative pitch error with the summation of turntable positioning precision corresponding teeth tip circle arc length.
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| CN104148745B (en) * | 2014-08-12 | 2016-05-11 | 西华大学 | The enveloping worm flank of tooth is online to be detected and revises processing method |
| CN106152896B (en) * | 2015-04-07 | 2018-11-30 | 宁夏巨能机器人系统有限公司 | A kind of detection method of planetary gear detection device |
| CN104985483B (en) * | 2015-06-05 | 2017-09-12 | 南京工程学院 | A kind of method for improving large gear circular pitch deviation on-machine measurement precision |
| EP3255373B1 (en) * | 2016-06-09 | 2019-04-24 | Klingelnberg AG | Contact measurement on the tooth flank of a gear wheel |
| JP2018163060A (en) * | 2017-03-27 | 2018-10-18 | 大阪精密機械株式会社 | Gear measuring instrument |
| CN108151617A (en) * | 2018-02-05 | 2018-06-12 | 重庆机床(集团)有限责任公司 | A kind of large-scale gear hobbing machine portable gear pitch tester |
| CN110617790B (en) * | 2018-06-19 | 2020-08-07 | 西安工业大学 | Method for realizing tooth pitch deviation measurement of large gear by adopting relative method |
| CN108941789A (en) * | 2018-08-04 | 2018-12-07 | 安徽吉乃尔电器科技有限公司 | A kind of processing measuring tool of face gear |
| CN109277879B (en) * | 2018-08-27 | 2020-07-28 | 西安工业大学 | Harmonic decomposition-based gear hobbing pitch error on-machine compensation method for large gear |
| CN109365924B (en) * | 2018-12-24 | 2019-08-30 | 重庆市计量质量检测研究院 | The more ball magnetic orientation formula tooth pitch templates of multilayer-and its magnetic force design method |
| CN110940254B (en) * | 2019-09-12 | 2021-06-04 | 华南理工大学 | Gear pitch deviation measuring method and measuring tool thereof |
| CN111366119B (en) * | 2020-03-05 | 2021-04-06 | 西安工业大学 | Method for separating system errors of measuring instrument in gear pitch deviation measurement |
| CN111609788B (en) * | 2020-06-03 | 2021-06-29 | 沈阳工业大学 | Large gear pitch deviation on-machine measuring instrument |
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| JPH0538622A (en) * | 1991-07-31 | 1993-02-19 | Komatsu Ltd | Tooth thickness measuring device for cutting gear wheel |
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| CN102639957A (en) * | 2009-12-22 | 2012-08-15 | 三菱重工业株式会社 | Gear measuring method |
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Effective date of registration: 20220707 Address after: 210000 No. 18, Qing'an Road, Jiangbei new area, Nanjing, Jiangsu Patentee after: NANJING GONGDA CNC TECHNOLOGY Co.,Ltd. Address before: 210009, No. 5, new exemplary Road, Nanjing, Jiangsu Patentee before: Nanjing Tech University Patentee before: NANJING GONGDA CNC TECHNOLOGY Co.,Ltd. |
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