CN106767594A - A kind of large gear lathe gauge head center scaling method based on sector gear measurer - Google Patents
A kind of large gear lathe gauge head center scaling method based on sector gear measurer Download PDFInfo
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- CN106767594A CN106767594A CN201611118761.2A CN201611118761A CN106767594A CN 106767594 A CN106767594 A CN 106767594A CN 201611118761 A CN201611118761 A CN 201611118761A CN 106767594 A CN106767594 A CN 106767594A
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- measurer
- gauge head
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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 provides a kind of large gear lathe gauge head center scaling method based on sector gear measurer, S01：Make sector gear measurer；S02：Correction sector gear measurer plane is parallel with the working face of machine tool rotary work stage, and calibration sector gear measurer is coaxial with the axis of rotation of rotary work piece platform；S03：Measurement sampling site, selectes several teeth groove specially on sector gear measurer, performs tooth profile measurement program, to selected teeth groove measurement sampling site, obtains the flank of tooth measurement data of teeth groove；S04：The flank of tooth data of some teeth groove according to collection, analyze the slope direction and size of the teeth directional slope deviation of tooth form, calculate the site error correction at gauge head center, demarcate the position at gauge head center.The present invention uses general sector gear measurer, reduces large-sized numerical control gear machining apparatus cost, has the advantages that adjustment is simple, easily operated, can improve the gauge head stated accuracy of large gear lathe and demarcate efficiency.
Description
Technical field
It is the present invention relates to a kind of lathe gauge head precision calibration method more particularly to a kind of based on the large-scale of sector gear measurer
Gear machine gauge head center scaling method.
Background technology
Large gear as large-scale wind generating, forging equipment, metallurgical equipment and marine installation key components and parts.By
In the volume of large gear workpiece it is big, quality is big, clamping is inconvenient, be not easy to enterprising in three-coordinates measuring machine or gear measurement machine
Row measurement, and use measuring method of offing normal to there is secondary clamping error, gear measurement precision can be reduced.In recent years, it is big both at home and abroad
The large-scale roll flute of type gear machine manufacturing company production, gear hobbing, shaping machine are provided with on-position measure system, this survey in place
Amount method realizes the closed loop processing of gear, greatly improves measurement efficiency, precision and the reliability of gear wheel, reduces gear measurement
Cost.
But large gear lathe on-position measure system is influenceed by working environment and itself high-precision requirement is, it is necessary to periodically
Positional precision to gauge head is demarcated, it is generally the case that spot frequency is for weekly.At present, exist from large gear lathe
From the point of view of the service condition of level measuring system, the precision and efficiency that its gauge head is demarcated are always a great problem.It is primarily present two sides
Face reason, one is that the head calibration method of traditional large gear lathe has that stated accuracy is low, traditional large-scale tooth
The cylinder that wheel lathe is generally used is demarcated or standard ball is demarcated, and this scaling method causes greatly calibrated error because of the swing diameter of work
Linear Amplifer, the stated accuracy of gauge head is not high；Two is big for accepted standard gear scaling method on miniature gear lathe
It is infeasible on type gear machine, because heavy duty machine tools receive gauge head front end travel limit, larger-sized master gear can only be used,
But can so increase measurer cost, because clamping is inconvenient, demarcation efficiency can be substantially reduced.
The content of the invention
For Shortcomings in the prior art, the invention provides a kind of large gear lathe based on sector gear measurer
Gauge head center scaling method, can directly reflect the probe location precision of gear machine, it is to avoid traditional standard cylinder is demarcated
The errors of principles of method, improves the gauge head stated accuracy of large gear lathe.
The present invention is to realize above-mentioned technical purpose by following technological means.
A kind of large gear lathe gauge head center scaling method based on sector gear measurer, comprises the following steps：
S01：Make sector gear measurer；
S02：Correction sector gear measurer plane is parallel with the working face of machine tool rotary work stage, calibrates sector gear amount
Tool is coaxial with the axis of rotation of rotary work piece platform；
S03：Measurement sampling site, selectes several teeth groove specially on sector gear measurer, performs tooth profile measurement program, right
Selected teeth groove measurement sampling site, obtains the flank of tooth measurement data of teeth groove；
S04：According to the data of measurement, the flank profil slope deviation average value f of the left flank of tooth is calculatedhalmFlank profil with the right flank of tooth is oblique
Rate deviation average fharm；Sector gear measurer looks into handbook and draws profile accuracy standard value Fha, work as fhalm(Δx,Δy)≤1.4*
Fha, and fharm(Δx,Δy)≤1.4*FhaWhen, complete the demarcation of gauge head；
S05：Work as fhal(Δx,Δy)>1.4*Fha, or fhar(Δx,Δy)>1.4*FhaWhen, calculate the position at gauge head center
(Δ a, Δ b) demarcate the position at gauge head center to put calibration corrections；
S06：According to the position at the new probe location center demarcated, S03 steps are repeated.
Further, the fan angle of the sector gear measurer is between 30 °~60 °, the flank profil of sector gear measurer (1),
Teeth directional and tooth pitch accuracy class are ISO 3.
Further, the S02 steps are specially：
S02.1：Sector gear measurer is placed in machine tool rotary work stage；
S02.2：Levelling end standard band is measured by the first amesdial parallel with the plane of rotary table；By adjusting
Horizontal screw makes the horizontal end face reference tape of sector gear measurer parallel with the working face of machine tool rotary working table；
S02.3：School center of circle reference tape is measured by the second amesdial coaxial with the axis of rotation of rotary table；Centering is fanned
The center of circle of shape gear measuring tool, makes the imaginary center of circle of sector gear measurer concentric with the center of circle of machine tool rotary working table.
Further, level-off screw number is 3 in the S02.2 steps.
Further, the S05 steps are specially：
S05.1：Set up the Mathematical Modeling of relation between gauge head error and flank of tooth slope deviation；Assuming that gauge head footpath in X direction
It is Δ x to error, the flank profil slope deviation of the left and right flank of tooth produced by Δ x is fhal(Δ x) and fhar(Δ x), and fhal(Δx)
With fhar(incline direction of Δ x) is conversely, size is identical；Assuming that gauge head is Δ y along Y-direction tangential error, by caused by Δ y two
The flank profil slope deviation of lateral tooth flank is fhal(Δ y) and fhar(Δ y), and fhal(Δ y) and fhar(incline direction of Δ y) is identical,
Size is identical；And influences of the radial error Δ x and tangential error Δ y to the flank profil slope deviation of the arranged on left and right sides flank of tooth meets line
Property principle of stacking, therefore, the flank profil slope deviation of the left and right flank of tooth can be expressed as f caused by Δ x and Δ yhal(Δ x, Δ y) and
fhar(Δx,Δy)：
S05.2：According to involute property, according to equation groupIt is inclined that flank profil is calculated respectively
Difference fhal(Δx,0)、fhar(Δx,0)、fhal(Δy,0)、fhar(Δy,0)、fhal(Δx,Δy)、fhar(Δx,Δy)；
In above-mentioned equation group, involute profile is around the point of theory that O points rotate
There is radial error Δ x and tangential error Δ y in gauge head, and when measuring the left flank of tooth, rotary table rotates around O points
Calculating corner is
There is radial error Δ x and tangential error Δ y in gauge head, and when measuring the right flank of tooth, rotary table rotates around O points
Calculating corner is
Wherein：x0It is the X-coordinate value of gauge head center original position A points；x1For gauge head is moved in X direction, and still in teeth groove
The X-coordinate value of B points；rbIt is rolling circle radius；
S05.3：Calculate the correction factor k of Δ x and Δ yxAnd ky：Assuming that in the presence of disturbance slight error Δ x and Δ y, wherein Δ
X ∈ [- 0.05,0.05] and Δ y ∈ [- 0.05,0.05], and the unit of Δ x and Δ y is mm, appoints and takes Δ x and Δ y values, root
According to the equation group in S05.2, arranged on left and right sides flank profil slope deviation respectively f is calculatedhal(Δ x, Δ y) and fhar(Δx,
Δy)；Known (Δ x, Δ y) and fhal(Δx,Δy)、fhar(Δ x, Δ y), according to the change pattern of formula in S05.1Correction factor k can be solvedxAnd ky；
S05.4：Calculate site error correction (the Δ a, Δ b) at gauge head center：According to equationSolve calibration corrections (Δ a, Δ b)；
S05.5：By the calibration corrections (Δ a, in Δ b) input programs.
The beneficial effects of the present invention are：
1. the large gear lathe gauge head center scaling method based on sector gear measurer of the present invention, using general
Etalon, can reduce the calibration cost of large-sized numerical control gear machining apparatus；
2. the large gear lathe gauge head center scaling method based on sector gear measurer of the present invention, with adjustment
Simply, easily operated advantage, the gauge head that can improve large gear lathe demarcates efficiency；
3. the large gear lathe gauge head center scaling method based on sector gear measurer of the present invention, can be directly anti-
Mirror the probe location precision of gear machine, it is to avoid the errors of principles of traditional standard cylinder scaling method, improve large-scale tooth
Take turns the gauge head stated accuracy of lathe.
Brief description of the drawings
Fig. 1 is the structural representation of sector gear measurer of the present invention.
Fig. 2 is the fan in the large gear lathe gauge head center scaling method based on sector gear measurer of the present invention
Shape gear measuring tool uses schematic diagram.
Fig. 3 is sector gear measurer on-line measurement schematic diagram of the present invention.
Fig. 4 is the computation model of the tooth profile error that probe location error of the present invention is caused.
In figure：
1- sector gear measurers；2- water transfer plain screws；3- lifting eyes；4- levelling end standard bands；5- schools center of circle benchmark
Band；6- machine tool rotary working tables；The amesdials of 7- first；The amesdials of 8- second；9- gauge heads.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment the present invention is further illustrated, but protection scope of the present invention is simultaneously
Not limited to this.
A kind of large gear lathe gauge head center scaling method based on sector gear measurer, it is characterised in that including such as
Lower step：
S01：Make sector gear measurer 1；
S02：Correction sector gear 1 plane of measurer is parallel with the working face of machine tool rotary work stage 6, calibrates sector gear
Measurer 1 is coaxial with the axis of rotation of rotary work piece platform 6；
S03：Measurement sampling site, specially selectes several teeth groove on the tool of sector gear amount 1, performs tooth profile measurement program,
To selected teeth groove measurement sampling site, the flank of tooth measurement data of teeth groove is obtained；
S04：According to the data of measurement, the flank profil slope deviation average value f of the left flank of tooth is calculatedhalmFlank profil with the right flank of tooth is oblique
Rate deviation average fharm；Sector gear measurer 1 looks into handbook and draws profile accuracy standard value Fha, work as fhalm(Δx,Δy)≤
1.4*Fha, and fharm(Δx,Δy)≤1.4*FhaWhen, complete the demarcation of gauge head 9；
S05：Work as fhal(Δx,Δy)>1.4*Fha, or fhar(Δx,Δy)>1.4*FhaWhen, calculate the center of gauge head 9
(Δ a, Δ b) demarcate the position at the center of gauge head 9 to site error correction；
S06：According to the position at the new side head center of position 9 demarcated, S03 steps are repeated.
Wherein, the fan angle of the sector gear measurer 1 is between 30 °~60 °, flank profil, the tooth of sector gear measurer (1)
ISO 3 or ISO more than 3 is reached to being required with tooth pitch accuracy class.
The S02 steps are specially：
S02.1：Sector gear measurer 1 is placed in machine tool rotary work stage 6；
S02.2：Levelling end standard is measured by the first amesdial 7 parallel with the plane of rotary table 6 with 4；It is logical
Crossing level-off screw 2 makes the horizontal end face reference tape 4 of sector gear measurer 1 parallel with the working face of machine tool rotary working table 6；
The quantity of water transfer plain screw 2 is 3.
S02.3：School center of circle reference tape 5 is measured by the second amesdial 8 coaxial with the axis of rotation of rotary table 6；Look for
The center of circle of positive sector gear measurer 1, makes the imaginary center of circle of sector gear measurer 1 concentric with the center of circle of machine tool rotary working table 6.
The S05 steps are specially：
S05.1：Set up the Mathematical Modeling of relation between the error of gauge head 9 and flank of tooth slope deviation；Assuming that gauge head 9 is in X direction
Radial error is Δ x, and the flank profil slope deviation of the left and right flank of tooth produced by Δ x is fhal(Δ x) and fhar(Δ x), and fhal(Δ
And f x)har(incline direction of Δ x) is conversely, size is identical；Assuming that gauge head 9 is Δ y along Y-direction tangential error, caused by Δ y
The flank profil slope deviation of two lateral tooth flanks is fhal(Δ y) and fhar(Δ y), and fhal(Δ y) and fhar(the incline direction phase of Δ y)
Together, size is identical；And influences of the radial error Δ x and tangential error Δ y to the flank profil slope deviation of the arranged on left and right sides flank of tooth meets
Linear superposition theorem, therefore, the flank profil slope deviation of the left and right flank of tooth can be expressed as f caused by Δ x and Δ yhal(Δx,Δy)
And fhar(Δx,Δy)：
S05.2：According to involute property, according to equation groupIt is inclined that flank profil is calculated respectively
Difference fhal(Δx,0)、fhar(Δx,0)、fhal(Δy,0)、fhar(Δy,0)、fhal(Δx,Δy)、fhar(Δx,Δy)；
In above-mentioned equation group, involute profile is around the point of theory that O points rotate
There is radial error Δ x and tangential error Δ y in gauge head, and when measuring the left flank of tooth, rotary table 6 rotates around O points
Calculating corner be
There is radial error Δ x and tangential error Δ y in gauge head, and when measuring the right flank of tooth, rotary table 6 rotates around O points
Calculating corner be
Wherein：x0It is the X-coordinate value of gauge head center original position A points；x1For gauge head is moved in X direction, and still in teeth groove
The X-coordinate value of B points；rbIt is rolling circle radius；
S05.3：Calculate the correction factor k of Δ x and Δ yxAnd ky：Assuming that in the presence of disturbance slight error Δ x and Δ y, wherein Δ
X ∈ [- 0.05,0.05] and Δ y ∈ [- 0.05,0.05], and the unit of Δ x and Δ y is mm, appoints and takes Δ x and Δ y values, root
According to the equation group in S05.2, arranged on left and right sides flank profil slope deviation respectively f is calculatedhal(Δ x, Δ y) and fhar(Δx,
Δy)；Known (Δ x, Δ y) and fhal(Δx,Δy)、fhar(Δ x, Δ y), according to the change pattern of formula in S05.1Correction factor k can be solvedxAnd ky；
S05.4：Calculate site error correction (the Δ a, Δ b) at the center of gauge head 9：According to equationSolve calibration corrections (Δ a, Δ b)；
S05.5：By the calibration corrections (Δ a, in Δ b) input programs.
Shown in Fig. 1, the number of teeth of sector gear measurer 1 is that 98, modulus is 8mm, 3 grades of straight tooth column teeth of ISO of facewidth 120mm
A part for wheel, and 45 ° of fan angle, there is 24 teeth on sector gear measurer.
As shown in Figure 2, the S01-S02 steps are completed.
S03：The teeth groove that teeth groove numbering is 1,8,16,24 is selected on sector gear measurer 1, altogether 4 teeth groove；Demarcating
Teeth groove numbering to be measured is input into program, tooth profile measurement program is performed, sampling site measurement is carried out by 9 pairs of tooth forms of selected teeth groove of gauge head.
S04：From tooth profile measurement result：Teeth groove numbering is 1,8,16,24 4 flank profil slopes of the left flank of tooth of teeth groove
Deviation fhal(Δ x, Δ y) are respectively 21 μm, 22 μm, 25 μm, 20 μm, the flank profil slope deviation f of the right flank of toothhar(Δ x, Δ y) point
Not Wei -18 μm, -14 μm, -17 μm, -15 μm, then the average value of the flank profil slope deviation of the arranged on left and right sides flank of tooth be respectively fhalmWith
fharmRespectively 22 μm and -16 μm, control handbook show that profile accuracy reaches 7 grades of ISO, and the actual tooth form of sector gear measurer 1
Precision ISO 3, then judge gauge head 9 in site error, it is necessary to be demarcated to the center of gauge head 9.
S05：Fig. 3 and 4 is：The computation model of the tooth profile error that probe location error is caused；In figure：A points are the center of gauge head 9
Initial position, B points be gauge head 9 in X direction after translational motion and still with the position of the centre of sphere of profile contact, when gauge head 9 from A
Put and be moved to B location, corresponding gauge head 9 is then moved to D positions with the contact point of flank profil by location of C.
Assuming that artificial given disturbance slight error Δ x=0.05mm and Δ y=0.05mm, turns during the measuring point of the left and right flank of tooth
The point of theory of platformCalculating corner of the left flank of tooth comprising errorCalculating of the right flank of tooth comprising error
CornerObtain because (the arranged on left and right sides flank profil slope deviation that both Δ x, Δ y) are produced jointly is respectively fhal(Δ
X, Δ y)=8.9 μm and fhar(Δ x, Δ y)=5.4 μm；The correction factor for calculating is kx=143 and ky=35；By known
Correction factor kx、kyWith the average value f of the flank profil slope deviation of two lateral tooth flankshalm、fharm, the position for calculating gauge head center is missed
Difference correction amount a and Δ b is respectively 0.021mm and 0.54mm.Probe location error correction is calculated in calibrating procedure input
Amount (Δ a=0.021mm, Δ b=0.54mm), carries out secondary demarcation.S04 steps are repeated, when demarcation certainty of measurement and sector
When the available accuracy for taking turns measurer 1 is consistent, the demarcation of gauge head 9 is completed.
Assuming that artificial given disturbance slight error Δ x '=- 0.05mm and Δ y '=- 0.05mm, the measuring point of the left and right flank of tooth
When turntable point of theoryCalculating corner of the left flank of tooth comprising errorThe right flank of tooth includes error
Calculate cornerObtain being respectively because of the arranged on left and right sides flank profil slope deviation that both (Δ x ', Δ y ') is produced jointly
f’hal(Δ x ', Δ y ')=- 8.9 μm and f 'har(Δ x ', Δ y ')=- 5.4 μm；The correction factor for calculating is kx=143 and ky
=35；Known correction factor kx、kyWith the average value f of the flank profil slope deviation of two lateral tooth flankshalm=22 μm, fharm=-16 μ
M, calculates site error correction amount a and Δ the b respectively 0.021mm and 0.54mm at gauge head center.In calibrating procedure input
Probe location calibration corrections (Δ a=0.021mm, Δ b=0.54mm) are calculated, secondary demarcation is carried out.Repeat S04 steps
Suddenly, when demarcation certainty of measurement is consistent with the available accuracy of sector gear measurer 1, the demarcation of gauge head 9 is completed.
Preferred embodiment but the present invention is not limited to above-mentioned implementation method to the embodiment for of the invention, not
In the case of substance of the invention, any conspicuously improved, replacement that those skilled in the art can make
Or modification belongs to protection scope of the present invention.
Claims (5)
1. a kind of large gear lathe gauge head center scaling method based on sector gear measurer, it is characterised in that including as follows
Step：
S01：Make sector gear measurer (1)；
S02：Correction sector gear measurer (1) plane is parallel with the working face of machine tool rotary work stage (6), calibrates sector gear
Measurer (1) is coaxial with the axis of rotation of rotary work piece platform (6)；
S03：Measurement sampling site, selectes several teeth groove specially on sector gear amount (1) tool, performs tooth profile measurement program, right
Selected teeth groove measurement sampling site, obtains the flank of tooth measurement data of teeth groove；
S04：According to the data of measurement, the flank profil slope deviation average value f of the left flank of tooth is calculatedhalmFlank profil slope with the right flank of tooth is inclined
Difference average value fharm；Sector gear measurer (1) looks into handbook and draws profile accuracy standard value Fha, work as fhalm(Δx,Δy)≤1.4*
Fha, and fharm(Δx,Δy)≤1.4*FhaWhen, complete the demarcation of gauge head (9)；
S05：Work as fhal(Δx,Δy)>1.4*Fha, or fhar(Δx,Δy)>1.4*FhaWhen, calculate the position at gauge head (9) center
(Δ a, Δ b) demarcate the position at gauge head (9) center to calibration corrections；
S06：According to the position at new probe location (9) center demarcated, S03 steps are repeated.
2. the large gear lathe gauge head center scaling method based on sector gear measurer according to claim 1, it is special
Levy and be, the fan angle of the sector gear measurer (1) between 30 °~60 °, the flank profil of sector gear measurer (1), teeth directional and
Tooth pitch accuracy class is ISO 3.
3. the large gear lathe gauge head center scaling method based on sector gear measurer according to claim 1, it is special
Levy and be, the S02 steps are specially：
S02.1：Sector gear measurer (1) is placed in machine tool rotary work stage (6)；
S02.2：Levelling end standard band (4) is measured by the first amesdial (7) parallel with the plane of rotary table (6)；
Make the horizontal end face reference tape (4) of sector gear measurer (1) and the work of machine tool rotary working table (6) by water transfer plain screw (2)
Make plane parallel；
S02.3：School center of circle reference tape (5) are measured by the second amesdial (8) coaxial with the axis of rotation of rotary table (6)；
The center of circle of centering sector gear measurer (1), makes the imaginary center of circle of sector gear measurer (1) and the circle of machine tool rotary working table (6)
The heart is concentric.
4. the large gear lathe gauge head center scaling method based on sector gear measurer according to claim 3, it is special
Levy and be, water transfer plain screw (2) quantity is 3 in the S02.2 steps.
5. the large gear lathe gauge head center scaling method based on sector gear measurer according to claim 1, it is special
Levy and be, the S05 steps are specially：
S05.1：Set up the Mathematical Modeling of relation between gauge head (9) error and flank of tooth slope deviation；Assuming that gauge head (9) is in X direction
Radial error is Δ x, and the flank profil slope deviation of the left and right flank of tooth produced by Δ x is fhal(Δ x) and fhar(Δ x), and fhal(Δ
And f x)har(incline direction of Δ x) is conversely, size is identical；Assuming that gauge head (9) is Δ y along Y-direction tangential error, caused by Δ y
Two lateral tooth flanks flank profil slope deviation be fhal(Δ y) and fhar(Δ y), and fhal(Δ y) and fhar(the incline direction phase of Δ y)
Together, size is identical；And influences of the radial error Δ x and tangential error Δ y to the flank profil slope deviation of the arranged on left and right sides flank of tooth meets
Linear superposition theorem, therefore, the flank profil slope deviation of the left and right flank of tooth can be expressed as f caused by Δ x and Δ yhal(Δx,Δy)
And fhar(Δx,Δy)：
S05.2：According to involute property, according to equation groupTotal profile deviation is calculated respectively
fhal(Δx,0)、fhar(Δx,0)、fhal(Δy,0)、fhar(Δy,0)、fhal(Δx,Δy)、fhar(Δx,Δy)；
In above-mentioned equation group, involute profile is around the point of theory that O points rotate
There is radial error Δ x and tangential error Δ y in gauge head, and when measuring the left flank of tooth, rotary table (6) rotates around O points
Calculating corner is
There is radial error Δ x and tangential error Δ y in gauge head, and when measuring the right flank of tooth, rotary table (6) rotates around O points
Calculating corner is
Wherein：x0It is the X-coordinate value of gauge head center original position A points；x1For gauge head is moved in X direction, and the B points still in teeth groove
X-coordinate value；rbIt is rolling circle radius；
S05.3：Calculate the correction factor k of Δ x and Δ yxAnd ky：Assuming that in the presence of disturbance slight error Δ x and Δ y, wherein Δ x ∈
[- 0.05,0.05] and Δ y ∈ [- 0.05,0.05], and the unit of Δ x and Δ y is mm, appoints and takes Δ x and Δ y values, according to
Equation group in S05.2, calculates arranged on left and right sides flank profil slope deviation respectively fhal(Δ x, Δ y) and fhar(Δx,Δ
y)；Known (Δ x, Δ y) and fhal(Δx,Δy)、fhar(Δ x, Δ y), according to the change pattern of formula in S05.1Correction factor k can be solvedxAnd ky；
S05.4：Site error correction (the Δ a, Δ b) at gauge head (9) center of calculating：According to equationSolve calibration corrections (Δ a, Δ b)；
S05.5：By the calibration corrections (Δ a, in Δ b) input programs.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109146956A (en) * | 2018-08-09 | 2019-01-04 | 厦门市计量检定测试院 | A kind of linearity error correction factor acquisition methods of vision positioning system |
| CN113770715A (en) * | 2021-09-13 | 2021-12-10 | 中国电建集团贵州电力设计研究院有限公司 | Coal mill gear deviation adjusting method |
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| CN106767594B (en) | 2019-04-02 |
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Effective date of registration: 20220616 Address after: No. 666, Jiande Road, Zhangpu Town, Kunshan City, Suzhou, Jiangsu 215321 Patentee after: JIANGSU HENGYUAN PRECISION MACHINERY MANUFACTURING Co.,Ltd. Address before: Zhenjiang City, Jiangsu Province, 212013 Jingkou District Road No. 301 Patentee before: JIANGSU University |