CN104535585B - Laser diffraction measuring instrument for surface defects of bearing roller and method of laser diffraction measuring instrument - Google Patents
Laser diffraction measuring instrument for surface defects of bearing roller and method of laser diffraction measuring instrument Download PDFInfo
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- CN104535585B CN104535585B CN201510044401.1A CN201510044401A CN104535585B CN 104535585 B CN104535585 B CN 104535585B CN 201510044401 A CN201510044401 A CN 201510044401A CN 104535585 B CN104535585 B CN 104535585B
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Abstract
The invention relates to a laser diffraction measuring instrument for surface defects of a bearing roller and a method of the laser diffraction measuring instrument. The laser diffraction measuring instrument comprises a lifting plate which can rise and fall along the vertical direction, wherein a rotary table for placing a roller is arranged on the lifting plate; a flat plate with a conical through hole is arranged above the lifting plate; the conical through hole is formed right above the rotary table; the aperture of the conical through hole is smaller than that of the roller; a spring expansion link for propping against the upper end surface of the roller is arranged above the flat plate; upright posts are respectively arranged on the left side and the right side of the conical through hole; a slide chute is formed in each upright post; and a knife edge levelling ruler capable of moving left and right along the slide chute is formed in each slide chute. The invention provides a set of novel positioning, clamping and rotating device; the knife edge levelling rulers are pressed on the bearing roller surface by elastic force to form slits, so as to achieve the distance control of the slits; the quality of laser diffraction stripe images is ensured; and the bearing roller surface quality detection device is efficient, easy to operate and high in accuracy.
Description
Technical field
The present invention relates to a kind of laser diffraction measuring instrument device of bearing roller surface defect and its method.
Background technology
Bearing is to play part that is fixing and reducing load coefficient of friction in mechanical transmission course.Precision to machine and
Service life has a major impact.Therefore, the measurement of the quality for bearing roller Surface Machining for the raw manufacturer of bearing is must
Few.
It is directed to the no special detection technique of the detection of the suface processing quality of bearing roller in existing production practices, many
Number still adopts visual method, relies on veteran skilled worker one by one bearing roller to be identified with eyes, this method is not
Only expensive, efficiency is low but also the factor that there is human error, and effect is undesirable.
Laser diffraction measurement technology utilizes laser brightness high, good directionality, and monochromaticity is good and the features such as coherence is good, employing
Trickle slot distances fluctuation can be converted into bright by non-cpntact measurement and indirect measurement method according to Fraunhofer diffraction principle
The spacing change of aobvious striped, can be used for measuring atomic little Surface Flaw.Existing laser diffraction measuring instrument device cannot
To workpiece, whole outer surface carries out 360 ° of measurement, and complex operation is it is impossible to be used for Practical Project simultaneously.Bearing roller surface is lacked
Sunken carries out 360 ° of laser diffraction measuring instrument devices at present also in blank.
According to fraunhofer Slit Diffraction, when laser passes through to be formed by between roller bearing surface and edge of a knife leveling ruler knife edge
Slit（Slit width is D）, accept the light and dark diffraction fringe of screen display, fringe spacing d and slit width in two-dimensional CCD
What degree D, laser wavelength lambda, slit and acceptance were shielded meets relation d=L λ/D between L.Measure separation of diffraction stripe d it is possible to
Anti- release slit width D.
Content of the invention
The problem that the present invention is directed to above-mentioned prior art presence makes improvement, and that is, the technical problem to be solved is
A kind of laser diffraction measuring instrument device of bearing roller surface defect and its method are provided it is proposed that a set of new positioning, clamping, rotation
Edge of a knife leveling ruler is pressed on bearing roller surface using elastic force simultaneously and forms the spacing control that slit easily realizes slit by rotary device
System is it is ensured that the quality of laser diffraction stripe pattern；It is a kind of efficient, easy to operate, high-precision bearing roller surface quality inspection
Survey device.
In order to solve above-mentioned technical problem, a kind of technical scheme of the present invention is：A kind of bearing roller surface defect swash
Optical diffraction measuring instrument, including one can vertically oscilaltion lifter plate, described lifter plate is provided with one and is used for putting
Put the turntable of roller, described lifter plate be arranged above the flat board with circular cone through hole, described circular cone through hole is located at rotation
The surface of platform, the aperture of this circular cone through hole is less than roller, and the top of described flat board is provided with for contact roller upper surface
Telescopic spring bar, described flat board is respectively arranged with column on the left and right sides of circular cone through hole, and described column is provided with chute, institute
State and in chute, be provided with the edge of a knife leveling ruler that can move left and right along chute, the end face contact of described edge of a knife leveling ruler on the wall of roller side,
Multiple projections are provided with this end face, the rear side of described edge of a knife leveling ruler is hinged with second spring expansion link, the two ends of described flat board
All it is hinged with stock, the described other end of second spring expansion link and the upper end of stock are hinged, and the two ends of described lifter plate set
It is equipped with stroke groove, the lower end of described stock is horizontally slipped in stroke groove by a roller bearing, so that during lifter plate oscilaltion, long
Bar promotes edge of a knife leveling ruler contact on the side wall of roller, and lifter plate drives roller to rise contact and lives telescopic spring bar simultaneously；Described
Before and after circular cone through hole, side is respectively arranged with laser instrument to flat board and two-dimensional CCD accepts screen.
Further, the raised interlaced arrangement on described two edge of a knife leveling rulers.
Further, it is provided with collimating mirror between described laser instrument and roller, so that the laser that laser instrument sends is through accurate
It is irradiated on the slit of roller both sides after the collimation of straight mirror.
Further, the underface of described lifter plate is provided with seat board, described seat board is provided with to order about lifter plate upper and lower
The elevating mechanism of lifting；Described elevating mechanism can be Worm-gear type elevating mechanism, hydraulic cylinder, scissors fork elevating mechanism etc..
Further, the left and right sides of described flat board is also respectively provided with for supporting and guiding propping up of second spring expansion link
Dagger, described support column is provided with the through hole allowing second spring expansion link to pass through.
In order to solve above-mentioned technical problem, another kind of technical scheme of the present invention is：A kind of bearing roller surface defect
Laser diffraction measurement method, is carried out according to the following steps：
（1）The axial two ends of bearing roller are fixed, the left and right sidewall of bearing roller is respectively provided with and is adjacent to roller side
The edge of a knife leveling ruler of wall, the end face that described edge of a knife leveling ruler is contacted with roller side wall is provided with multiple projections, so that edge of a knife leveling ruler
End face and roller side wall between form slit, and record slit width D；
（2）It is respectively provided with laser instrument and two-dimensional CCD accepts screen at the front-rear side walls side of roller, record slit and connect simultaneously
Shielded apart from L；
（3）Open laser instrument, make roller along centrage uniform rotation, with computer timing acquiring and record two-dimensional CCD and connect
The diffraction fringe image information shielded, the corresponding two-dimensional CCD of diffraction image of each point of slit accepts the upper horizontal direction of screen relatively
A line, according to fraunhofer Slit Diffraction d=λ L/D, wherein λ is laser wavelength of incidence, using analysis software
Go out fringe spacing d on every horizontal line on diffraction image, instead release its corresponding slit width D1, obtain different positions on slit
The gap size put, by comparing the D1 and slit width D measuring in advance, judges in which position of the surface of bearing occur lacking
Fall into, and the size of defect, and then judge roller surface defect level.
Further, the raised interlaced arrangement on described two edge of a knife leveling rulers.
Compared with prior art, the invention has the advantages that：This device passes through the bearing rolling in a uniform rotation
Edge of a knife leveling ruler is arranged on the left and right sidewall of son, side side arranges laser instrument and two-dimensional CCD accepts screen in front and back, makes the end face of edge of a knife leveling ruler
Form slit and the wall of roller side between, with fraunhofer Slit Diffraction, judge roller surface defect journey with the data obtained
Degree；Efficiently, easy to operate, high precision, suitable industrial mass production.
The present invention will be further described in detail with reference to the accompanying drawings and detailed description.
Brief description
Fig. 1 is the organigram of the embodiment of the present invention.
Fig. 2 is the principle schematic of the embodiment of the present invention.
Fig. 3 is the organigram of roller and edge of a knife leveling ruler in the embodiment of the present invention.
Fig. 4 is the diffraction fringe image that in the embodiment of the present invention, two-dimensional CCD accepts on screen.
In figure：1- roller, 2- seat board, 21- motor, 22- connecting rod lifting mechanism, 3- lifter plate, 31- stroke groove, 32- rotates
Platform, 4- flat board, 41- circular cone through hole, 42- column, 43- support column, 5- edge of a knife leveling ruler, 51- is raised, 6- telescopic spring bar, 7- the
Two telescopic spring bars, 8- stock, 9- laser instrument, 10- collimating mirror, 11- two-dimensional CCD accepts screen, the width of D- slit, L- slit with
Accept the distance of screen.
Specific embodiment
Embodiment one：As shown in Fig. 1 ~ 3, a kind of laser diffraction measuring instrument device of bearing roller surface defect, can including one
The lifter plate 3 of vertically oscilaltion, described lifter plate 3 is provided with one for placing the turntable 32 of roller 1, described
The flat board 4 being arranged above with circular cone through hole 41 of lifter plate 3, described circular cone through hole 41 is located at the surface of turntable 32,
The aperture of this circular cone through hole 41 is less than roller 1, and the spring that the top of described flat board 4 is provided with for contact roller 1 upper surface is stretched
Contracting bar 6, described flat board 4 is respectively arranged with column 42 on the left and right sides of circular cone through hole 41, and described column 42 is provided with chute,
It is provided with the edge of a knife leveling ruler 5 that can move left and right along chute, the end face contact of described edge of a knife leveling ruler 5 is in roller 1 side in described chute
On wall, this end face is provided with multiple raised 51, the rear side of described edge of a knife leveling ruler 5 is hinged with second spring expansion link 7, described flat
The two ends of plate 4 are all hinged with stock 8, and the other end of described second spring expansion link 7 and the upper end of stock 8 are hinged, described liter
The two ends of fall plate 3 are provided with stroke groove 31, and the lower end of described stock 8 is horizontally slipped in stroke groove 31 by a roller bearing, so that
During lifter plate 3 oscilaltion, stock 8 promotes projection 51 contact of edge of a knife leveling ruler on the side wall of roller 1, and lifter plate 3 carries simultaneously
Dynamic roller rises contact and lives telescopic spring bar 6；Described flat board 4 side before and after circular cone through hole 41 is respectively arranged with laser instrument 9 He
Two-dimensional CCD accepts screen 11.
In the present embodiment, projection 51 interlaced arrangement on described two edge of a knife leveling rulers, one of edge of a knife leveling ruler is arranged
There are two projections, another is provided with three projections.
In the present embodiment, between described laser instrument 9 and roller 1, it is provided with collimating mirror 10, so that the laser that laser instrument 9 sends
It is irradiated to after the collimation of collimating mirror 10 on the slit of roller both sides.
In the present embodiment, the underface of described lifter plate 3 is provided with seat board 2, described seat board 2 is provided with and orders about lifter plate
The connecting rod lifting mechanism 22 of 3 oscilaltions, this connecting rod lifting mechanism 22 includes the connecting rod that two middle parts are hinged and intersect, and two
The upper end of root connecting rod is all hinged on lifter plate bottom, and the lower end of a wherein elevating lever is hinged on seat board, another elevating lever
Lower end be connected with a motor 21, this motor drives this connecting rod to move, and then realizes the lifting of lifter plate.
In the present embodiment, the left and right sides of described flat board 4 is also respectively provided with for supporting and guiding second spring expansion link 7
Support column 43, described support column is provided with the through hole allowing second spring expansion link 7 to pass through.
During using this device, positioned in the circular cone through hole 41 that first bearing roller 1 is placed on flat board, opened motor
21, motor 21 orders about lifter plate 3 by connecting rod lifting mechanism 22 and rises, the turntable 32 on lifter plate 3 by roller 1 jack-up until
Roller upper end contact, carries in telescopic spring bar 6 bottom, the simultaneously connecting rod 8 at flat board 4 two ends under the stroke groove 31 of lifter plate acts on
Dynamic second spring expansion link 7, and then promote the end face contact of edge of a knife leveling ruler on the wall of roller side（Projection 51 on edge of a knife leveling ruler makes
Obtain the end face of edge of a knife leveling ruler and roller side wall forms slit, this slit width is D, and measures the distance of slit and acceptance screen
L）, it is then turned on turntable 32 uniform rotation roller 1, be then turned on laser instrument 9, the laser that laser instrument 9 sends is through collimating mirror 10
Collimation after be irradiated on the slit of roller both sides, and accept screen in two-dimensional CCD and 11 show light and dark diffraction fringe,
As shown in Figure 4（Middle bright fringes both sides light and shade striped is the diffraction image of slit）, with computer timing acquiring and remember
Record two-dimensional CCD accepts the diffraction fringe image information on screen, and the corresponding two-dimensional CCD of diffraction image of each point of slit accepts the upper water of screen
Square to a relative line, according to fraunhofer Slit Diffraction d=λ L/D, diffraction image is gone out using analysis software
Fringe spacing d on upper every horizontal line, instead releases its corresponding slit width D1, and the gap obtaining diverse location on slit is big
Little, by comparing the D1 and slit width D measuring in advance, judge, in which position of the surface of bearing, defect occurs, and lack
Sunken size, and then judge roller surface defect level.
The foregoing is only presently preferred embodiments of the present invention, all impartial changes done according to scope of the present invention patent with
Modify, all should belong to the covering scope of the present invention.
Claims (7)
1. a kind of laser diffraction measuring instrument device of bearing roller surface defect it is characterised in that：Can vertically go up including one
The lifter plate of lower lifting, described lifter plate is provided with one for placing the turntable of roller, the surface of described lifter plate sets
It is equipped with the flat board with circular cone through hole, described circular cone through hole is located at the surface of turntable, the aperture of this circular cone through hole is less than roller,
The top of described flat board is provided with the telescopic spring bar for contact roller upper surface, and described flat board is in the left and right sides of circular cone through hole
On be respectively arranged with column, described column is provided with chute, in described chute, is provided with the edge of a knife that can move left and right along chute
Leveling ruler, the end face contact of described edge of a knife leveling ruler, on the wall of roller side, this end face is provided with multiple projections, described edge of a knife leveling ruler
Rear side is hinged with second spring expansion link, and the two ends of described flat board are all hinged with stock, described second spring expansion link another
End is hinged with the upper end of stock, and the two ends of described lifter plate are provided with stroke groove, and the lower end of described stock is existed by a roller bearing
Horizontally slip in stroke groove, so that during lifter plate oscilaltion, stock promotes edge of a knife leveling ruler contact on the side wall of roller, simultaneously
Lifter plate drives roller to rise contact and lives telescopic spring bar；Described flat board is respectively arranged with laser instrument in side before and after circular cone through hole
Accept screen with two-dimensional CCD.
2. bearing roller surface defect according to claim 1 laser diffraction measuring instrument device it is characterised in that：Two knives
Raised interlaced arrangement on mouth leveling ruler.
3. bearing roller surface defect according to claim 1 laser diffraction measuring instrument device it is characterised in that：Described sharp
It is provided with collimating mirror, so that the laser that laser instrument sends is irradiated to roller after the collimation of collimating mirror between light device and roller
On the slit of both sides.
4. bearing roller surface defect according to claim 1 laser diffraction measuring instrument device it is characterised in that：Described liter
The underface of fall plate is provided with seat board, and described seat board is provided with the elevating mechanism ordering about lifter plate oscilaltion.
5. bearing roller surface defect according to claim 1 laser diffraction measuring instrument device it is characterised in that：Described flat
The left and right sides of plate is also respectively provided with the support column for supporting and guiding second spring expansion link, and described support column is provided with
Allow the through hole that second spring expansion link passes through.
6. a kind of laser diffraction measurement method of bearing roller surface defect is it is characterised in that carry out according to the following steps：
（1）The axial two ends of bearing roller are fixed, the left and right sidewall of bearing roller is respectively provided with and is adjacent to roller side wall
Edge of a knife leveling ruler, the end face that described edge of a knife leveling ruler is contacted with roller side wall is provided with multiple projections, so that the end of edge of a knife leveling ruler
Form slit between face and roller side wall, and record slit width D；
（2）It is respectively provided with laser instrument and two-dimensional CCD accepts screen at the front-rear side walls side of roller, record slit simultaneously and accept screen
Apart from L；
（3）Open laser instrument, make roller along centrage uniform rotation, with computer timing acquiring and record two-dimensional CCD and accept screen
On diffraction fringe image information, the corresponding two-dimensional CCD of diffraction image of each point of slit accepts relative one of the upper horizontal direction of screen
Bar line, according to fraunhofer Slit Diffraction d=λ L/D, wherein λ is laser wavelength of incidence, goes out to spread out using analysis software
Penetrate fringe spacing d on every horizontal line on image, instead release its corresponding slit width D1, obtain diverse location on slit
Gap size, by the comparison of D1 and D, judges the defective locations of bearing surface, and the size of defect, and then judges roller table
Planar defect degree.
7. bearing roller surface defect according to claim 6 laser diffraction measurement method it is characterised in that：Two knives
Raised interlaced arrangement on mouth leveling ruler.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510044401.1A CN104535585B (en) | 2015-01-29 | 2015-01-29 | Laser diffraction measuring instrument for surface defects of bearing roller and method of laser diffraction measuring instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510044401.1A CN104535585B (en) | 2015-01-29 | 2015-01-29 | Laser diffraction measuring instrument for surface defects of bearing roller and method of laser diffraction measuring instrument |
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| CN104535585B true CN104535585B (en) | 2017-02-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL2030479A (en) * | 2021-10-12 | 2022-05-24 | Univ Qingdao Technology | Method and device for measuring radial internal clearance of bearing based on laser transmission |
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| CN105352916B (en) * | 2015-11-27 | 2018-04-17 | 江苏理工学院 | Spinning frame surface of roller quality detection device and method of work based on laser diffraction |
| CN106000896B (en) * | 2016-06-08 | 2018-03-02 | 东莞市贝尔试验设备有限公司 | A kind of roller size intelligent detection device |
| CN109540918B (en) * | 2018-11-28 | 2021-04-16 | 鞍钢集团自动化有限公司 | Hot-rolled coil edge defect detection device and method |
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| CN1184932A (en) * | 1996-12-11 | 1998-06-17 | 吉第联合股份公司 | Method of measuring intensity of radiation transmitted through body |
| JP2001349714A (en) * | 2000-06-07 | 2001-12-21 | Sumitomo Chem Co Ltd | Uniformity evaluation method of mesh-shaped pattern |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL2030479A (en) * | 2021-10-12 | 2022-05-24 | Univ Qingdao Technology | Method and device for measuring radial internal clearance of bearing based on laser transmission |
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