CN104501753A - Novel ultra-large gear on-position measuring method - Google Patents
Novel ultra-large gear on-position measuring method Download PDFInfo
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- CN104501753A CN104501753A CN201410842885.XA CN201410842885A CN104501753A CN 104501753 A CN104501753 A CN 104501753A CN 201410842885 A CN201410842885 A CN 201410842885A CN 104501753 A CN104501753 A CN 104501753A
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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
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
Abstract
The invention relates to the field of geometrical parameter measurement, in particular to a novel ultra-large gear on-position measuring method. The novel ultra-large gear on-position measuring method comprises the following steps of performing cylinder fitting on a measured point by measuring a cylindrical surface of an addendum of a gear so as to obtain an axial equation; using the axial equation as a Z-axis coordinate of the ultra-large gear; measuring an end surface of the gear; performing planar fitting on a measured point of the end surface; using an intersection point of a fitting plane obtained by measurement and a fitting cylinder axis as an origin of coordinates of a workpiece coordinate system of the ultra-large gear; establishing the workpiece coordinate system of the ultra-large gear according to a point-line-plane relation; and sequentially measuring teeth of the ultra-large gear in segmented measuring and transposition measuring modes so as to realize automatic measurement on local tooth surfaces of the ultra-large gear. The equipment and the method have the advantages of simple structure, high measuring efficiency, high precision and the like. A measurement range of a small coordinate measuring machine is expanded by a tooth surface point matching and splicing technology, and the ultra-large gear can be measured by a small horizontal cantilever type coordinate measuring machine.
Description
Technical field
The present invention relates to geometric measurement field, particularly a kind of Novel special large gear on-position measure method.
Background technology
Gear be most important in mechanical drive, be also most widely used a kind of driving type, have ratio of gear accurately, compact conformation, transmission efficiency advantages of higher.Gear is divided into minute gear, conventional gear, gear wheel, super-huge gear by size.Sanctified by usage, the gear that diameter is greater than 3000mm is called super-huge gear.Super-huge gear is mainly used in the field, key of some keys and the important industry of the impact overall situation, as generating, locomotive, mining machinery, large-scale engineering machinery, large ship, drilling platform and rocket launching etc., it plays a very important role in national economy and Defence business, has irreplaceability.
The precision of gear has direct and serious impact to the noise of gear and serviceable life, and the precision of different applications to gear has different requirements, and particularly in precision drive field, it has high requirements to the precision of gear.For the high efficiency transmission of the high-performance realizing Grand Equipments and high serviceable life, the precision of user to super-huge gear proposes more and more higher requirement.
Reach unconventional degree along with the size of gear and the continuous increase of modulus, leap from quantitative change to qualitative change also be there occurs to the requirement of gear precision measuring technique means, cause super-huge gear precision measurement and become global problem, never realize cost-effective measurement.
The principal element of especially big gear measurement difficulty is caused to sum up as follows:
Gear size is large.As measuring method routinely, along with the increase of gear size, the structure of surveying instrument, volume, by corresponding increase, bring very large difficulty to instrument manufacturing and assembling.
The measuring basis of gear requires with its design, to manufacture benchmark consistent.The design basis of gear is generally positioning core axle or endoporus, and super-huge gear size is comparatively large, looks for positioning datum tool to acquire a certain degree of difficulty with conventional measuring equipment, causes gear measurement benchmark and design, manufacture benchmark disunity, makes the measuring accuracy of instrument be difficult to ensure.
Super-huge gear measuring instrument develops on the basis of conventional gear surveying instrument, wherein gear measuring center and large-scale coordinate measuring machine are the amplified version of conventional gear measuring center and coordinate measuring machine, namely measure the surveying instrument that great gear just manufactures corresponding size, just measuring method belongs to " large to survey greatly ".At present, gear measuring center maximum is in the world the WGT4000 gear measuring center of German Wenzel company, and this instrument measurable 4000mm gear wheel, maximum load capacity can reach 30000kg.Coordinate measuring machine maximum is in the world the PMM-G large-scale three-dimensional amount machine of German Leitz company exploitation, and measurement range is 7000mm × 4000mm × 3000mm, can measure maximum tooth wheel diameter 6000mm, modulus 0.5-100mm.
But the measurement mechanism of current super-huge gear is bulky, and cost is high, and current super-huge gear measuring instrument adopts the measuring method of " large to survey greatly " effectively can not solve the precision measurement of super-huge gear, needs the new proving installation of proposition and method to realize the precision measurement of super-huge gear.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency existing in prior art, a kind of Novel special large gear on-position measure device and method is provided; Overcome existing super-huge gear measuring instrument to need to develop long guideway, and the shortcoming of diameter more than the super-huge gear of 6m cannot be measured, propose a kind of super-huge gear based on point cloud matching method and survey device and measuring method.
In order to realize foregoing invention object, the invention provides following technical scheme:
A kind of Novel special large gear on-position measure device, comprises base, moves horizontally slide block pedestal, column, Z-direction slide plate and Y-direction slide plate; Move horizontally described in wherein said column is vertically fixedly mounted on slide block pedestal, the described slide block pedestal that moves horizontally can move horizontally on base, described column is provided with the Z-direction slide plate that can slide up and down, described Z-direction slide plate is also provided with the Y-direction slide plate that can move forward and backward; Described Y-direction slide plate is provided with gauge head unit.
Further, Y-direction slide plate comprises: Y-direction gage beam, Y-direction measure slide block and counter weight device; Wherein the upper and lower of Y-direction gage beam has guide rail respectively, and described Y-direction measurement slide block can prolong upper rail and move forward and backward; Described counter weight device can prolong lower guideway and move forward and backward.
Further, the front end of Y-direction measurement slide block is provided with gauge head unit.
Further, described gauge head unit is trigger-type or is scan-type.
Further, described inking device is balancing weight.
Further, described Y-direction measurement slide block and counter weight device lay respectively at the both sides of described Y-direction gage beam.
Further, described Y-direction measurement slide block and counter weight device are arranged on the supporting surface up and down of described Y-direction gage beam respectively; Corresponding guide rail can be prolonged move forward and backward.
Further, described Y-direction measures slide block and counter weight device is contrary along the direction of motion of guide rail, and such mode of motion can ensure to measure in the movable process of slide block in Y-direction, the gravitational equilibrium of measurement mechanism, reduce the tilt quantity of device, and then reduce measuring error.
The Y-direction slide plate of existing on-position measure device, can move forward and backward on the basis of Z-direction slide plate when measuring, when measuring miniature gear, because the amount of movement before and after Y-direction slide plate is also corresponding smaller, so the gravity center shift in the moving process before and after Y-direction slide plate need not be considered, and thus the Y-direction slide plate gage beam that brings of gravity center shift tilt caused by measuring error, but when higher to the accuracy requirement of measuring, error caused by the inclination of gage beam is but very important, and when measuring super-huge gear, amount of movement before and after corresponding Y-direction slide plate gage beam is also corresponding becomes very large, the measuring position farthest of Y-direction slide plate gage beam and the shift amount recently between measuring position increase, the center of gravity of the gage beam thus in process also can change, Y-direction slide plate gage beam is caused to tilt, and then the measuring error caused can become and can not ignore, when measuring super-huge gear, cumulative errors is more remarkable, so the measurement accuracy in order to ensure super-huge gear, the gage beam of this Novel special large gear on-position measure device have employed gravitational equilibrium design, Y-direction is measured the both sides that slide block and counter weight device are located at described Y-direction gage beam respectively, it is contrary along the direction of motion of guide rail with counter weight device that Y-direction measures slide block, to ensure the gravity balance in measuring process, reduce the gage beam caused due to centre-of gravity shift tilt caused by measuring error, and the cumulative errors formed thus, ensure that the exactly of measurement carries out.
Based on this Novel special of one large gear on-position measure method of this Novel special large gear on-position measure device, comprise the following steps:
(1) this Novel special large gear on-position measure device is moved to by tested gear, be adjusted to the position being applicable to measuring.
(2) the tested tip cylinder of manual measurement, to measurement point matching cylinder, to obtain axial equation; Using this axial equation as Z axis coordinate; Achieve the location of tested Gear axis; Choosing tip cylinder in this step is measurement datum; Be the reason such as processing technology due to super-huge gear, actual machining benchmark is tip cylinder.
Prototype gear end face, by end surface measurement point survey data fitting plane, using the true origin of the intersection point of obtained fit Plane and above-mentioned fitting circle mast axis as measuring workpieces coordinate system;
Measure the flank of tooth a bit, by this point in conjunction with above-mentioned axis and fit Plane; According to this point-line-surface relation, build tested gear workpieces coordinate system; Achieve the location between tested gear and measurement mechanism like this.
(3) according to constructed tested gear workpieces coordinate system, each tooth of tested gear is measured in segmentation successively, can realize the measurement of the tested gear local flank of tooth.(so-called areal survey, namely refers to that tested whole gear is divided into some measuring sections to measure, and when tested gear size is very large, each tested tooth in each section also can be segmented measurement).
(4) mode adopting transposition to measure, after the measurement of the last period terminates, moves to new measuring position by measurement mechanism
,repeat above step, until complete the measurement of institute's geared surface.
The subregion that this Novel special large gear on-position measure device once only can realize tested super-huge gear is measured; A measuring position only can gather limited flank of tooth data; For expanding the measurement range of this Novel special large gear on-position measure device, realize every error measure of whole gear teeth, the mode that the present invention adopts transposition to measure: mobile level measuring arrangement (or transmitting gear), the tested gear of areal survey; The measurement of diameter more than the super-huge gear of 6m can be realized like this with more small-sized on-position measure device.
Further, the measurement data of every two adjacent measurement locations in described step (4), has public flank of tooth measurement point; To realize coupling and the splicing of data; Public measure portion must be had in adjacent twice measurement, such as measuring position realizes the measurement of the 1st, the 2nd, No. 3 tooth for the first time, second time measuring position realizes the measurement of the 3rd, the 4th, No. 5 tooth, now No. 3 teeth are exactly the public part of this twice measurement, the rest may be inferred, until complete the measurement of all teeth of super-huge gear; When also carrying out areal survey to each tooth, just needing between the adjacent measuring position of tested tooth, choosing public-measurement part; Measure successively, until complete the corresponding measurement of all teeth.
Further, the measurement data of every two adjacent measurement locations, by public flank of tooth measurement point, carries out point cloud matching and data and splices and calculate; By in unified for the measurement data of the different measuring position gear workpieces coordinate system to a unique measuring position.The flank of tooth data of a rear measuring position and the flank of tooth data of last position are carried out splicing and unifying, to carry out bulk treatment and evaluation to flank of tooth data.
Two measuring positions are measured the same flank of tooth, carry out the coupling of flank of tooth data by the cloud data matching process of the same flank of tooth under two measuring positions; Concrete, the relation between two measuring position coordinate systems is found by cloud data matching algorithm, by unified for tested gear workpieces coordinate system to same measuring position, then under this unified coordinate system, data processing and error evaluation are carried out to institute's geared surface measurement data, finally realizes the measurement of super-huge gear gamut and evaluate with unified.
Preferred as one, by under tested gear workpieces coordinate system unification to the first measuring position; The method comparison of such unified coordinate system is simple, easily realizes, also meets the general custom of data processing.
Further, in order to better realize unified process and the error evaluation of data, can be reconstructed to all measurement data of above-mentioned unification to the tested gear workpieces coordinate system of same measuring position; Re-establish the new workpiece coordinate system of tested gear, (preferred, the true origin of new workpiece coordinate system is established to the central point of tested gear bottom gears end face, in the middle part of after X-axis or Y-axis being based upon the tooth of tested gear or in the middle part of teeth groove) and unified error evaluation is carried out to institute's geared surface measurement data.
Further, the facewidth is exceeded to the super-huge gear of measurement mechanism measurement range, the flank of tooth is measured can areal survey, adopts coupling and the splicing of each segment data of flank of tooth point cloud matching algorithm realization, finally realizes the measurement of the every error of the widths over teeth flank of tooth.
compared with prior art, beneficial effect of the present invention: the invention provides a kind of Novel special large gear on-position measure device and measuring method; First through measuring wheel tip cylinder, measurement point matching cylinder, to obtain axial equation; Using the Z axis coordinate of this axial equation as super-huge gear, realize the location of super-huge Gear axis; Prototype gear end face, to end surface measurement point fit Plane, will measure the intersection point of fit Plane and the fitting circle mast axis obtained, as the true origin of super-huge gear workpieces coordinate system; According to this point-line-surface relation, build super-huge gear workpieces coordinate system, realize the location between super-huge gear and measurement mechanism; Solve the key issue of on-position measure technology.
The mode that the inventive method adopts areal survey and transposition to measure; The each tooth of super-huge gear is measured in segmentation successively, i.e. the automatic measurement of the existing super-huge gear local flank of tooth; By two measuring positions, the same flank of tooth is measured, carry out flank of tooth coupling by the cloud data of flank of tooth point same under two measuring positions; Find the relation between two measuring position coordinate systems, by under super-huge gear workpieces coordinate system unification to the first measuring position; And finally realize the measurement of super-huge gear gamut and unify to evaluate.The present invention overcomes the drawback that existing ripe gear measuring instrument needs to build large-scale guide rail, the attainable super-huge gear measurement of large scale structure ability in a word; Adopt flank of tooth point cloud matching and splicing to extend the measurement range of small-sized coordinate measuring machine, achieve and measure super-huge gear with small-sized horizontal cantilevered coordinate measuring machine.Have measuring accuracy high, the device structure of use is simple, measures the advantages such as cost is low; Be applicable in the error measure of various super-huge gear.
Accompanying drawing illustrates:
Fig. 1 is this Novel special large gear on-position measure apparatus structure schematic diagram.
Fig. 2 is the Y-direction skateboard schematic diagram of this Novel special large gear on-position measure device.
Fig. 3 is the test position schematic diagram of this Novel special large gear on-position measure device.
Fig. 4 is this Novel special large gear on-position measure method schematic diagram.
Fig. 5 is the Data Matching schematic diagram of spur gear adjacent measurement locations.
Fig. 6 is the Data Matching schematic diagram of spiral gear adjacent measurement locations.
Embodiment
Below in conjunction with test example and embodiment, the present invention is described in further detail.But this should be interpreted as that the scope of the above-mentioned theme of the present invention is only limitted to following embodiment, all technology realized based on content of the present invention all belong to scope of the present invention.
The object of the invention is to overcome above-mentioned deficiency existing in prior art, a kind of Novel special large gear on-position measure device and method is provided; Overcome existing super-huge gear measuring instrument to need to develop long guideway, and the shortcoming of diameter more than the super-huge gear of 6m cannot be measured, propose a kind of super-huge gear based on point cloud matching method and survey device and measuring method.
In order to realize foregoing invention object, the invention provides following technical scheme:
A kind of Novel special large gear on-position measure device, as shown in Figure 1, Figure 2, Figure 3 shows (Fig. 1 and Fig. 3 is two kinds of structural representations of this Novel special large gear on-position measure device), comprise base 1, move horizontally slide block pedestal 2, column 3, Z-direction slide plate 4 and Y-direction slide plate 5; 2 are moved horizontally on slide block pedestal described in wherein said column 3 is vertically fixedly mounted on, the described slide block pedestal 2 that moves horizontally can move horizontally on base 1, described column 3 is provided with the Z-direction slide plate 4 that can slide up and down, described Z-direction slide plate 4 is also provided with the Y-direction slide plate 5 that can move forward and backward; Described Y-direction slide plate 5 is provided with gauge head unit 6.
Further, as shown in Figure 2, Y-direction slide plate 5 comprises Y-direction gage beam 5-1, Y-direction measures slide block 5-2 and counter weight device 5-3; Wherein the upper and lower end face of Y-direction gage beam 5-1 has upper rail and lower guideway respectively, and described Y-direction measurement slide block 5-2 can prolong upper rail and move forward and backward; Described counter weight device 5-3 can prolong lower guideway and move forward and backward.
Further, the front end of Y-direction measurement slide block is provided with gauge head unit 6.
Further, described gauge head unit 6 can be trigger-type, also can be scan-type.
Further, described inking device 5-3 is balancing weight.
Further, described Y-direction measures the upper and lower end face that slide block 5-2 and counter weight device 5-3 is arranged on described Y-direction gage beam 5-1 respectively; Corresponding guide rail can be prolonged move forward and backward.
Further, described Y-direction measurement slide block and counter weight device lay respectively at the both sides of described Y-direction gage beam.
Further, as shown in Figure 2, described Y-direction measures slide block and counter weight device is contrary, concrete along the direction of motion of guide rail, and when Y-direction measurement slide block moves forward, described counter weight device moves backward.Such mode of motion can ensure, measures in the movable process of slide block, the gravitational equilibrium of whole measurement mechanism, reduces the tilt quantity of device, reduce measuring error in Y-direction.
The Y-direction slide plate of existing on-position measure device, can move forward and backward on the basis of Z-direction slide plate when measuring, when measuring miniature gear, because the amount of movement before and after Y-direction slide plate is also corresponding smaller, so the gravity center shift in the moving process before and after Y-direction slide plate need not be considered, and thus the Y-direction slide plate gage beam that brings of gravity center shift tilt caused by measuring error, but when higher to the accuracy requirement of measuring, error caused by the inclination of gage beam is but very important, and when measuring super-huge gear, amount of movement before and after corresponding Y-direction slide plate gage beam is also corresponding becomes very large, the measuring position farthest of Y-direction slide plate gage beam and the shift amount recently between measuring position increase, the center of gravity of the gage beam thus in process also can change, Y-direction slide plate gage beam is caused to tilt, and then the measuring error caused can become and can not ignore, when measuring super-huge gear, cumulative errors is more remarkable, so the measurement accuracy in order to ensure super-huge gear, the gage beam of this Novel special large gear on-position measure device have employed gravitational equilibrium design, Y-direction is measured the both sides that slide block and counter weight device are located at described Y-direction gage beam respectively, it is contrary along the direction of motion of guide rail with counter weight device that Y-direction measures slide block, to ensure the gravity balance in measuring process, reduce the gage beam caused due to centre-of gravity shift tilt caused by measuring error, and the cumulative errors formed thus, ensure that the exactly of measurement carries out.
Based on this Novel special of one large gear on-position measure method of this Novel special large gear on-position measure device, comprise following steps as shown in Figure 4:
(1) this Novel special large gear on-position measure device is moved to by tested gear, be adjusted to the position (as shown in Figure 3) being applicable to measuring.
(2) the tested tip cylinder of manual measurement, to measurement point matching cylinder, to obtain axial equation; Using this axial equation as Z axis coordinate; Achieve the location of tested Gear axis; Choosing tip cylinder in this step is measurement datum; Be the reason such as processing technology due to super-huge gear, actual machining benchmark is tip cylinder.
Prototype gear end face, by end surface measurement point survey data fitting plane, using the true origin of the intersection point of obtained fit Plane and above-mentioned fitting circle mast axis as measuring workpieces coordinate system;
Measure the flank of tooth a bit, by this point in conjunction with above-mentioned axis and fit Plane; According to this point-line-surface relation, build tested gear workpieces coordinate system; Achieve the location between tested gear and measurement mechanism like this.
(3) according to constructed tested gear workpieces coordinate system, each tooth of tested gear is measured in segmentation successively, can realize the measurement of the tested gear local flank of tooth.(so-called areal survey, namely refers to that tested whole gear is divided into some measuring sections to measure, and when tested gear size is very large, each tested tooth in each section also can be segmented measurement).
(4) mode adopting transposition to measure, after the measurement of the last period terminates, moves to new measuring position by measurement mechanism, repeats above step, until complete the measurement of institute's geared surface.
The subregion that this Novel special large gear on-position measure device once only can realize tested super-huge gear is measured; A measuring position only can gather limited flank of tooth data; For expanding the measurement range of this Novel special large gear on-position measure device, realize every error measure of whole gear teeth, the mode that the present invention adopts transposition to measure: mobile level measuring arrangement (or transmitting gear), the tested gear of areal survey; The measurement of diameter more than the super-huge gear of 6m can be realized like this with more small-sized on-position measure device.
Further, the measurement data of every two adjacent measurement locations in described step (4), has public flank of tooth measurement point; To realize coupling and the splicing of data; Public measure portion must be had in adjacent twice measurement, such as measuring position realizes the measurement of the 1st, the 2nd, No. 3 tooth for the first time, second time measuring position realizes the measurement of the 3rd, the 4th, No. 5 tooth, now No. 3 teeth are exactly the public part of this twice measurement, the like, until complete the measurement of all teeth of super-huge gear; When also carrying out areal survey to each tooth, just need between the adjacent measuring position of tested tooth, (Fig. 5 is the Data Matching schematic diagram of spur gear adjacent measurement locations as Suo Shi Fig. 5, Fig. 6 to choose public-measurement part; Fig. 6 is the Data Matching schematic diagram of spiral gear adjacent measurement locations; In figure, a is the measured face portion of position 1, and in figure, b is the measured face portion of position 2; And the public part of ab measured by position 1 and position 2, be construed as in figure and be only schematic, do not represent physical size); Measure successively, until complete the corresponding measurement of the whole flank of tooth.
Further, the measurement data of every two adjacent measurement locations, by public flank of tooth measurement point, carries out point cloud matching and data and splices and calculate; By in unified for the measurement data of the different measuring position gear workpieces coordinate system to a unique measuring position.The flank of tooth data of a rear measuring position and the flank of tooth data of last position are carried out splicing and unifying, to carry out bulk treatment and evaluation to flank of tooth data.
Two measuring positions are measured the same flank of tooth, carry out the coupling of flank of tooth data by the cloud data matching process of the same flank of tooth under two measuring positions; Concrete, the relation between two measuring position coordinate systems is found by cloud data matching algorithm, by unified for tested gear workpieces coordinate system to same measuring position, then under this unified coordinate system, data processing and error evaluation are carried out to institute's geared surface measurement data, finally realizes the measurement of super-huge gear gamut and evaluate with unified.
Preferred as one, by under tested gear workpieces coordinate system unification to the first measuring position; The method comparison of such unified coordinate system is simple, easily realizes, also meets the general custom of data processing.
Further, in order to better realize unified process and the error evaluation of data, can be reconstructed to all measurement data of above-mentioned unification to the tested gear workpieces coordinate system of same measuring position; Re-establish the new workpiece coordinate system of tested gear, (preferred, the true origin of new workpiece coordinate system is established to the central point of tested gear bottom gears end face, in the middle part of after X-axis or Y-axis being based upon the tooth of tested gear or in the middle part of teeth groove) and unified error evaluation is carried out to institute's geared surface measurement data.
Further, the facewidth is exceeded to the super-huge gear of measurement mechanism measurement range, the flank of tooth is measured can areal survey, adopts coupling and the splicing of each segment data of flank of tooth point cloud matching algorithm realization, finally realizes the measurement of the every error of the widths over teeth flank of tooth.
In a word
,the invention provides a kind of Novel special large gear on-position measure device; The gage beam of this Novel special large gear on-position measure device have employed gravitational equilibrium design, Y-direction is measured the both sides that slide block and counter weight device lay respectively at described vertical Y-direction gage beam; It is contrary along the direction of motion of guide rail with counter weight device that Y-direction measures slide block, to ensure the gravity balance in measuring process, measuring error caused by the gage beam reduced caused by centre-of gravity shift tilts, and the cumulative errors formed thus, ensure that steadily carrying out of measurement.
In a word, the invention provides a kind of Novel special large gear on-position measure device and measuring method; First through measuring wheel tip cylinder, measurement point matching cylinder, to obtain axial equation; Using the Z axis coordinate of this axial equation as super-huge gear, realize the location of super-huge Gear axis; Prototype gear end face, to end surface measurement point fit Plane, will measure the intersection point of fit Plane and the fitting circle mast axis obtained, as the true origin of super-huge gear workpieces coordinate system; According to this point-line-surface relation, build super-huge gear workpieces coordinate system, realize the location between super-huge gear and measurement mechanism; Solve the key issue of on-position measure technology.
The mode that the inventive method adopts areal survey and transposition to measure; The each tooth of super-huge gear is measured in segmentation successively, i.e. the automatic measurement of the existing super-huge gear local flank of tooth; By two measuring positions, the same flank of tooth is measured, carry out flank of tooth coupling by the cloud data of flank of tooth point same under two measuring positions; Find the relation between two measuring position coordinate systems, by under super-huge gear workpieces coordinate system unification to the first measuring position; And finally realize the measurement of super-huge gear gamut and unify to evaluate.The present invention overcomes the drawback that existing ripe gear measuring instrument needs to build large-scale guide rail, the attainable super-huge gear measurement of large scale structure ability in a word; Adopt flank of tooth point cloud matching and splicing to extend the measurement range of small-sized coordinate measuring machine, achieve and measure super-huge gear with small-sized horizontal cantilevered coordinate measuring machine.Have measuring accuracy high, the device structure of use is simple, measures the advantages such as cost is low; Be applicable in the error measure of various super-huge gear.
Above embodiment only in order to the present invention is described and and unrestricted technical scheme described in the invention, although this instructions with reference to each above-mentioned embodiment to present invention has been detailed description, but the present invention is not limited to above-mentioned embodiment, therefore anyly the present invention is modified or equivalent to replace; And all do not depart from technical scheme and the improvement thereof of the spirit and scope of invention, it all should be encompassed in the middle of right of the present invention.
Claims (9)
1. a Novel special large gear on-position measure method, is characterized in that, comprise the following steps:
(1) gear on-position measure device is moved to by tested gear, be adjusted to the position being applicable to measuring the flank of tooth;
(2) prototype gear tip cylinder, to measurement point matching cylinder, to obtain axial equation; Using the Z axis coordinate of this axial equation as tested gear;
Prototype gear end face, to end surface measurement point fit Plane, will measure the intersection point of fit Plane and the fitting circle mast axis obtained, as the true origin of tested gear workpieces coordinate system;
Measure the flank of tooth a bit, by this point in conjunction with described axis and fit Plane; Build super-huge gear workpieces coordinate system;
(3) according to step (2) according to constructed tested gear workpieces coordinate system, each tooth of tested gear is measured in segmentation successively, can realize tested gear local the flank of tooth measurement;
(4) mode adopting transposition to measure, moves to new measuring position by measurement mechanism
,repeat above step, until complete the measurement of tested gear institute geared surface.
2. a kind of Novel special large gear on-position measure method as claimed in claim 1, it is characterized in that, in described step (3), tested whole gear is divided into more than 1 measuring section, measures successively to each measuring section, until complete the measurement of institute's geared surface.
3. a kind of Novel special large gear on-position measure method as claimed in claim 2, it is characterized in that, in described step (3), each tested flank of tooth is divided into the measuring section of more than 1, successively each measuring section is measured, until complete whole measurements of this flank of tooth.
4. a kind of Novel special large gear on-position measure method as claimed in claim 3, it is characterized in that, in described step (4), the measurement data of every two adjacent measurement locations, has public flank of tooth measurement point; To realize coupling and the splicing of data.
5. a kind of Novel special large gear on-position measure method as claimed in claim 4, is characterized in that, in described step (4), the measurement data of every two adjacent measurement locations, by public flank of tooth measurement point, uses point cloud matching algorithm to carry out data splicing and calculating.
6. a kind of Novel special large gear on-position measure method as claimed in claim 5, is characterized in that, in described step (4); By unified for tested gear workpieces coordinate system to same measuring position.
7. a kind of Novel special large gear on-position measure method as claimed in claim 6, is characterized in that, in described step (4); By under tested gear workpieces coordinate system unification to the first measuring position.
8. a kind of Novel special large gear on-position measure method as claimed in claim 7, is characterized in that, in described step (4); The all measurement data of above-mentioned unification to the tested gear workpieces coordinate system of same measuring position are reconstructed; Re-establish the new workpiece coordinate system of tested gear.
9. a kind of Novel special large gear on-position measure method as described in claim 6,7 or 8, is characterized in that, in described step (4); Under unified coordinate system, to institute's geared surface measurement data, carry out data processing and error evaluation, the gamut finally realizing tested gear is measured and unified error evaluation.
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Cited By (2)
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| CN109579759A (en) * | 2018-11-27 | 2019-04-05 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of method of secondary coordinate fitting mensuration detection high-precision overlength standard component |
| CN112923890A (en) * | 2021-02-03 | 2021-06-08 | 浙江万向精工有限公司 | Measurement and evaluation method for spline tooth shape error |
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