CN106152955A - A kind of large-size axis parts detection device and method - Google Patents
A kind of large-size axis parts detection device and method Download PDFInfo
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- CN106152955A CN106152955A CN201610863780.1A CN201610863780A CN106152955A CN 106152955 A CN106152955 A CN 106152955A CN 201610863780 A CN201610863780 A CN 201610863780A CN 106152955 A CN106152955 A CN 106152955A
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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
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
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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
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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- Length Measuring Devices By Optical Means (AREA)
Abstract
The open a kind of large-size axis parts detection device of the present invention, including: measured axis supporting mechanism, described measured axis supporting mechanism includes support platform, revolving dial, free slide rail, tailstock and guide rail, described revolving dial be provided with first stir top, described tailstock be provided with second stir top, described first stir top with described second stir top for fixing measured axis；Light transmission formula sensor group, described light transmission formula sensor group includes installing rack upper sensor and lower sensor, by slide block and described guide rail mobile link bottom described installing rack；Grating scale, described grating scale and described guide rail parallel are fixed in described support platform, and described grating scale gauge outfit is located on described slide block.The present invention can revise the rigging error of sensor, can measure measured axis each fragment position diameter of axle and axial length data and mark the point that on measured axis, each is against regulation, it is achieved measures accurate and that the scope of measurement is wide purpose.
Description
Technical field
The present invention relates to axial workpiece detection technique field, particularly relate to a kind of large-size axis parts detection device and
Method.
Background technology
At present, along with improving constantly of machining accuracy and efficiency, the requirement to measurement apparatus is more and more higher.Survey
Certainty of measurement and the measurement efficiency of amount device drastically influence whole industrial expansion.Existing use light transmission formula sensor enters
The method of row diameter measurement the most only uses a set of sensor and only measures a position, measures scope little, and to sensor
Rigging error cannot be revised, simultaneously the most also cannot measurement axis footpath axial length equidimension, also cannot judge that this axial workpiece is accurately
No meet design requirement, cause the later stage not assemble.
Summary of the invention
It is an object of the invention to provide a kind of large-size axis parts detection device and method, the present invention can revise sensing
The rigging error of device, can measure measured axis each fragment position diameter of axle and axial length data and to mark on measured axis each against regulation
Point, it is achieved measure accurately and purpose that the scope of measurement is wide.
For achieving the above object, the invention provides a kind of large-size axis parts detection device, including:
Measured axis supporting mechanism, described measured axis supporting mechanism includes support platform, is located on described support platform one end
The revolving dial on surface, is located at the free slide rail of described support platform upper surface, is located at described free slide rail and along described freedom
The tailstock that slide rail moves, and be located at the guide rail of described support platform upper surface, described revolving dial be provided with first stir top,
Described tailstock be provided with second stir top, described first stir top with described second stir top for fixing measured axis；
Light transmission formula sensor group, described light transmission formula sensor group includes installing rack, is located at the top on installing rack top
Sensor and be located at the lower sensor of described installing rack bottom, is moved with described guide rail by slide block bottom described installing rack
Connect；
Grating scale, described grating scale and described guide rail parallel are fixed in described support platform, and described grating scale gauge outfit sets
On described slide block.
Optionally, described installing rack is gate, and described upper sensor includes top emitter and top receptor, described
Top emitter and top receptor are respectively arranged in the gate two of described installing rack at drift angle, under described lower sensor includes
Portion's emitter and top emitter, described lower transmission device and lower receiver be respectively arranged on the bottom of described gate two frame,
Described upper emitter and described lower emitter are positioned at the same side.
Optionally, described upper sensor and described lower sensor are picking sensor.
Optionally, described guide rail includes that track arranged in parallel and leading screw, described track are respectively arranged at two ends with first
Limit switch and the second limit switch, described leading screw one end connects has the first motor, described slide block to be located at described leading screw with described
Between track.
Optionally, described revolving dial connects the second motor.
Present invention also offers and a kind of utilize above-mentioned large-size axis parts detection device to carry out the method detected, bag
Include:
Setting manufacturing tolerance Pe of measured axis, the design diameter of axle Di of each section of measured axis and design axial length Li, wherein i represents institute
State the hop count of measured axis；
Obtain calibrating parameters A；
Control the first electric machine rotation；
Obtain the position coordinates P3 of the gauge outfit detection of grating scale, build position coordinates array P3 [n]；
Simultaneously obtain light transmission formula sensor group detection upper light curtain length P1 corresponding with described position coordinates P3 and under
Light curtain length P2, builds upper light curtain length number group P1 [n] and lower light curtain length array P2 [n] respectively, and wherein n is the individual of element
Number；
According to calibrating parameters A, calculate top array P12 [n] of described upper light curtain length number group, described top array P12
Each element P12=A-P1 in [n]；
Respectively described top array P12 [n] and described lower light curtain length array P2 [n] are carried out finite difference, respectively
Obtain difference array P ' 1, top [n] and difference array P ' 2, bottom [n]；
Obtain respectively in described difference array P ' 1, top [n] and described difference array P ' 2, bottom [n] more than manufacturing tolerance
The element P ' 1 of PejAnd P ' 2j, and with described element P ' 1jAnd P ' 2jCorresponding position coordinates P3j, wherein P ' 1jRepresent on described
Jth numerical value in difference array P ' 1, portion [n], P ' 2jRepresent jth numerical value in described difference array P ' 2, bottom [n]；
Judge P ' 1j-P’1j-1Or P ' 1j-P’1j+1Whether more than 1mm, and judge P ' 2j-P’2j-1Or P ' 2j-P’2j+1Whether
More than 1mm, if it is, determine P ' 1jAnd P ' 2jCorresponding position coordinates P3jFor waypoint；
Judge P ' 1j-P’1j-1Or P ' 1j-P’1j+1Whether less than 1mm, and judge P ' 2j-P’2j-1Or P ' 2j-P’2j+1Whether
Less than 1mm, if it is, determine P ' 1jAnd P ' 2jCorresponding position coordinates P3jFor defect point, record defect point；
Respectively described top array P12 [n] and described lower light curtain length array P2 [n] are carried out according to described waypoint point
Section, it is thus achieved that multistage position coordinates subnumber group, and the top subnumber group corresponding with each fragment position coordinate subnumber group and lower light curtain
Length subnumber group；
The described top subnumber group corresponding to each section of described position coordinates subnumber group and described lower light curtain length subnumber group
Make fitting a straight line respectively, obtain top subnumber group straight line l1 and lower light curtain length subnumber group straight line l2 respectively；
Calculate distance d between described top subnumber group straight line l1 and described lower light curtain length subnumber group straight line l2；Calculate
Described top subnumber group straight line l1 and average length l of described lower light curtain length subnumber group straight line l2；
Whether the difference of the design diameter of axle Di of the shaft part that judging distance d is corresponding with on measured axis is less than diameter of axle error threshold,
If it is determine that the diameter of axle of this shaft part of measured axis is qualified, the most defective；Judge average length l and respective shaft on measured axis
The difference of design axial length Li of section, whether less than axial length error threshold, if it is determines that the axial length of this shaft part of measured axis is closed
Lattice, the most defective.
Optionally, described acquisition calibrating parameters A, specifically include:
Obtain the position coordinates P*3 of the standard axle of the gauge outfit detection of grating scale, build position coordinates array P*3 [n]；
The upper light curtain corresponding with described position coordinates P*3 of the standard axle simultaneously obtaining the detection of light transmission formula sensor group is long
Degree P*1 and lower light curtain length P*2；
Respectively described upper light curtain length P*1 and described lower light curtain length P*2 are carried out fitting a straight line, obtain and described glazing
The straight line J that curtain length P1 is corresponding1x+K1y+L1=0 straight line J corresponding with described lower light curtain length P22x+K2y+L2=0；
According to straight line J1x+K1y+L1=0 and J2x+K2y+L2=0 calibrating parameters A:
Wherein x is the abscissa value of Points on Straight Line, and y is
The ordinate value of Points on Straight Line, J1、K1、L1It is respectively upper light curtain and measures the straight line parameter of straight line, J2, K2, L2 be respectively lower light curtain
Measuring the straight line parameter of straight line, R is the diameter of axle of standard axle, J=(J1+J2)/2, K=(K1-K2)/2。
Optionally, described position coordinates array P3 [n], upper light curtain length number group P1 [n], lower light curtain length array P2 [n]
The one digit number group identical for length with top array P12 [n].
The specific embodiment provided according to the present invention, the invention discloses techniques below effect: the big chi that the present invention provides
Very little axial part measurer realizes the detection of the enclosed to measured axis by arranging light transmission formula sensor group, is detecting
Time, upper sensor and lower sensor are along guide rail rectilinear movement, and will get off the detection signal record of measured axis in real time,
Position simultaneously also by grating scale recording light through mode sensor group.And utilize the detection method of the present invention that light transmission formula is passed
The data of sensor group detection and the data of grating scale detection carry out Treatment Analysis and obtain testing result.Number in this detection method
Process according to the data using finite difference that light transmission formula sensor group is detected in processing procedure, it is possible to obtain measured axis
Waypoint and defect point.Re-use line fitting method and process the data of light transmission formula sensor group detection, light transmission formula is passed
The measured axis lower edges point that sensor group measurement obtains carries out fitting a straight line, and then calculates the distance between two fitting a straight lines,
Thus avoid and directly the parameter detecting top and the bottom sensor subtracted each other, or the distance only detecting fixing point-to-point transmission is caused
Measured value and value of calculation is unilateral, accuracy is low problem, and then eliminate top and the bottom sensor mounting location with guide rail rail not
The alignment error vertically produced, improves certainty of measurement.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
The accompanying drawing used is needed to be briefly described, it should be apparent that, the accompanying drawing in describing below is only some enforcements of the present invention
Example, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to according to these accompanying drawings
Obtain other accompanying drawing.
The axonometric chart of the large-size axis parts detection device that Fig. 1 provides for the present invention；
The front view of the large-size axis parts detection device that Fig. 2 provides for the present invention；
The measuring state of the light transmission formula sensor group of the large-size axis parts detection device that Fig. 3 provides for the present invention shows
It is intended to；
Fig. 4 is the oscillogram of position coordinates P3 in the present invention；
Fig. 5 is the oscillogram of upper light curtain length P1 corresponding for position coordinates P3 in Fig. 4 in the present invention；
Fig. 6 is the oscillogram of lower light curtain length P2 corresponding for position coordinates P3 in Fig. 4 in the present invention；
The flow chart of the large-size axis parts detection method that Fig. 7 provides for the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
Understandable for enabling the above-mentioned purpose of the present invention, feature and advantage to become apparent from, real with concrete below in conjunction with the accompanying drawings
The present invention is further detailed explanation to execute mode.
Firstly the need of explanation: the large-size axis parts detection device that the present invention provides goes for multiple axle class
The detection of part, including large-sized axial workpiece and undersized axial workpiece, and comprises the multistage difference diameter of axle, axle
Long axial workpiece etc..
As Figure 1-3, the axonometric chart of the large-size axis parts detection device that Fig. 1 provides for the present invention；Fig. 2 is this
The front view of the large-size axis parts detection device of bright offer；The large-size axis parts detection dress that Fig. 3 provides for the present invention
The measuring state schematic diagram of the light transmission formula sensor group put.The large-size axis parts detection device of the present invention, including:
Measured axis supporting mechanism 1, described measured axis supporting mechanism 1 includes support platform 11, is located at described support platform 11
The revolving dial 12 of one end upper surface, is located at the free slide rail 13 of described support platform 11 upper surface, is located at described free slide rail
13 and the tailstock 14 that moves along described free slide rail 13, and it is located at the guide rail 15 of described support platform 11 upper surface, described time
Turning platform 12 to be provided with first and stir top 121, described tailstock 14 is provided with second and stirs top 141, and described first stirs top 121
Top 141 are stirred for fixing measured axis 4 with described second；Optionally, it is additionally provided with some iron gasket for machine tool 11 times in support platform
16, to ensure the gentle support of support platform.
Light transmission formula sensor group 2, described light transmission formula sensor group 2 includes installing rack 21, is located at installing rack 21 top
Upper sensor 22 and be located at the lower sensor 23 of described installing rack 21 bottom, pass through slide block bottom described installing rack 21
151 with described guide rail 15 mobile link；
Grating scale 3, described grating scale 3 is parallel with described guide rail 15 to be fixed in described support platform 11, described grating scale
Gauge outfit (not shown in figure 1) is located on described slide block 151.
In the present embodiment, in measured axis supporting mechanism, tailstock is mobile being located on free slide rail, make revolving dial and
Distance between tailstock is adjustable, it is achieved that the detection of the axial workpiece of different axial lengths.Owing to revolving dial can rotate, because of
This can also be that measured axis rotates such that it is able to realizes realizing the inspection of measured axis axial plane defect on this measured axis supporting mechanism
Survey.This detection device have employed light transmission formula sensor group and detects axial workpiece, detects tested by the form of light curtain
The diameter of axle of axle and surface, it is possible to the diameter of axle and the surface of detecting axial workpiece more accurately are the most defective.This detection device is also
It is provided with grating scale, by the shift position of grating scale detection light transmission formula sensor group such that it is able to according to this position coordinates
Determine the data that corresponding light transmission formula sensor group detects, more can accurately know waypoint and defect point.
As the optional embodiment of one, described installing rack 21 is gate, and described upper sensor 22 includes that top is sent out
Emitter 221 and top receptor 222, described top emitter 221 and top receptor 222 are respectively arranged on described installing rack 21
In gate two at drift angle, described lower sensor 23 includes lower transmission device 231 and lower receiver 232, described lower transmission
Device 231 and lower receiver 232 are respectively arranged on the bottom of gate two frame of described installing rack 21, described upper emitter 221 He
Described lower emitter 231 is positioned at the same side, top receptor 222 and lower receiver 232 and is positioned at the same side.Described top senses
Device 22 and described lower sensor 23 are picking sensor.
Measured axis is surrounded by the present embodiment middle and upper part emitter, top receptor, lower transmission device and lower receiver, logical
Crossing top emitter and lower transmission device launches top light curtain and bottom light curtain respectively, a portion light curtain is blocked by measured axis
Can not be irradiated on top receptor and lower receiver, thus the light received by detection top receptor and lower receiver
The length value of curtain obtains the diameter of axle of measured axis, and the waypoint of measured axis and defect point.
As the optional embodiment of one, described guide rail 15 includes track 152 arranged in parallel and leading screw 153,
Described track 152 is respectively arranged at two ends with the first limit switch 154 and the second limit switch 155, and described leading screw 153 one end connects to be had
First motor 156, described slide block 151 is located between described leading screw 153 and described track 152.Leading screw is driven by the first motor
Rotate thus realize leading screw band movable slider and the most smoothly move linearly, define the motion track of slide block, and can
Well control the translational speed of slide block, also it is ensured that the stationarity that moves of light transmission formula sensor group, reduce light curtain
Fluctuation so that the light curtain length recorded is more accurate.In the above-described embodiment, revolving dial 12 connects the second motor 122, logical
Cross whether and velocity of rotation the second motor controls the rotation of revolving dial, and the first motor and the second motor be all servo electric
Machine, its servomotor controller is WNMPC08-300BB stepping closed loop controller.
Present invention also offers and a kind of utilize above-mentioned large-size axis parts detection device to carry out the method detected, bag
Include:
Step 701: set manufacturing tolerance Pe of measured axis, the design diameter of axle Di of each section of measured axis and design axial length Li, its
Middle i represents the hop count of described measured axis；
Step 702: obtain calibrating parameters A；
Step 703: control the first electric machine rotation；
Step 704: obtain the position coordinates P3 of the gauge outfit detection of grating scale, build position coordinates array P3 [n]；
Step 705: the upper light curtain corresponding with described position coordinates P3 simultaneously obtaining the detection of light transmission formula sensor group is long
Degree P1 and lower light curtain length P2, build upper light curtain length number group P1 [n] and lower light curtain length array P2 [n] respectively, and wherein n is unit
The number of element；
Step 706: according to calibrating parameters A, calculate top array P12 [n] of described upper light curtain length number group, described top
Each element P12=A-P1 in array P12 [n]；
Step 707: respectively described top array P12 [n] and described lower light curtain length array P2 [n] are carried out finite difference
Point, respectively obtain difference array P ' 1, top [n] and difference array P ' 2, bottom [n]；
Step 708: obtain respectively in described difference array P ' 1, top [n] and described difference array P ' 2, bottom [n] and be more than
The element P ' 1 of manufacturing tolerance PejAnd P ' 2j, and with described element P ' 1jAnd P ' 2jCorresponding position coordinates P3j, wherein P ' 1jTable
Show jth numerical value in described difference array P ' 1, top [n], P ' 2jRepresent jth number in described difference array P ' 2, bottom [n]
Value；
Step 709: judge P ' 1j-P’1j-1Or P ' 1j-P’1j+1Whether more than 1mm, and judge P ' 2j-P’2j-1Or P ' 2j-
P’2j+1Whether more than 1mm, if it is, determine P ' 1jAnd P ' 2jCorresponding position coordinates P3jFor waypoint；
Step 710: judge P ' 1j-P’1j-1Or P ' 1j-P’1j+1Whether less than 1mm, and judge P ' 2j-P’2j-1Or P ' 2j-
P’2j+1Whether less than 1mm, if it is, determine P ' 1jAnd P ' 2jCorresponding position coordinates P3jFor defect point, record defect point；
Step 711: according to described waypoint respectively to described top array P12 [n] and described lower light curtain length array P2
[n] carries out segmentation, it is thus achieved that multistage position coordinates subnumber group, and the top subnumber group corresponding with each fragment position coordinate subnumber group
With lower light curtain length subnumber group；
Step 712: the described top subnumber group corresponding to each section of described position coordinates subnumber group and described lower light curtain are long
Degree subnumber group makees fitting a straight line respectively, obtains top subnumber group straight line l1 and lower light curtain length subnumber group straight line l2 respectively；
Step 713: calculate between described top subnumber group straight line l1 and described lower light curtain length subnumber group straight line l2 away from
From d；Calculate described top subnumber group straight line l1 and average length l of described lower light curtain length subnumber group straight line l2；
Step 714: the difference of the design diameter of axle Di of the shaft part that judging distance d is corresponding with on measured axis is less than the diameter of axle the most by mistake
Difference limen value, if it is determines that the diameter of axle of this shaft part of measured axis is qualified, the most defective；Judge average length l and measured axis
The difference of design axial length Li of upper corresponding shaft part, whether less than axial length error threshold, if it is determines this shaft part of measured axis
Axial length is qualified, the most defective.
The data that light transmission formula sensor group is detected by finite difference are used in the data handling procedure of this detection method
Process, it is possible to obtain waypoint and the defect point of measured axis.Re-use line fitting method and process light transmission formula sensor
The data of group detection, the measured axis lower edges point obtaining light transmission formula sensor group measurement carries out fitting a straight line, Jin Erji
Calculate the distance between two fitting a straight lines, thus avoid and directly the parameter detecting top and the bottom sensor is subtracted each other, or only
Measured value that the distance of the fixing point-to-point transmission of detection is caused and the problem that value of calculation is unilateral, accuracy is low, and then eliminate up and down
Portion's sensor mounting location and guide rail rail out of plumb and the alignment error that produces, improve certainty of measurement.
As the optional embodiment of one, the method for described acquisition calibrating parameters A specifically includes:
Obtain the position coordinates P*3 of the standard axle of the gauge outfit detection of grating scale, build position coordinates array P*3 [n]；
The upper light curtain corresponding with described position coordinates P*3 of the standard axle simultaneously obtaining the detection of light transmission formula sensor group is long
Degree P*1 and lower light curtain length P*2；
Respectively described upper light curtain length P*1 and described lower light curtain length P*2 are carried out fitting a straight line, obtain and described glazing
The straight line J that curtain length P1 is corresponding1x+K1y+L1=0 straight line J corresponding with described lower light curtain length P22x+K2y+L2=0；
According to straight line J1x+K1y+L1=0 and J2x+K2y+L2=0 calibrating parameters A:
Wherein x is the abscissa value of Points on Straight Line, and y is
The ordinate value of Points on Straight Line, J1、K1、L1It is respectively upper light curtain and measures the straight line parameter of straight line, J2, K2, L2 be respectively lower light curtain
Measuring the straight line parameter of straight line, R is the diameter of axle of standard axle, J=(J1+J2)/2, K=(K1-K2)/2。
The derivation of calibrating parameters A is as follows:
In order under the measurement data unification of two sensors to coordinate system, by straight line J1x+K1y+L1=0 is transformed to
J1x+K1(A-y)+L1=0.Because straight line J1x+K1(A-y)+L1=0 and J2x+K2y+L2=0 is not substantially parallel, in order to ask for
Distance between straight line, needs these two straight lines are done approximately parallel conversion.J1x+K1(A-y)+L1=0 can be expressed as
J1x-K1y+L1+K1A=0.In order to the new straight slope after making two to adjust is identical, takes J and K, meet J=(J1+J2)/2, K=
(K1-K2)/2, obtain new two straight line Jx-Ky+L1+K1A=0 and Jx+Ky+L2=0.Then the distance between two new straight lines can
ByDraw.Demarcate with the standard axle of a diameter of R, thenCan
?
As the optional embodiment of one, described position coordinates array P3 [n], upper light curtain length number group P1 [n], lower light
Curtain length array P2 [n] and the one digit number group identical for length of top array P12 [n].So ensure that a position is sat
Mark can the length of corresponding upper and lower two light curtains, thus facilitate the acquisition of data, search and process.
In this specification, each embodiment uses the mode gone forward one by one to describe, and what each embodiment stressed is and other
The difference of embodiment, between each embodiment, identical similar portion sees mutually.
Principle and the embodiment of the present invention are set forth by specific case used herein, saying of above example
Bright method and the core concept thereof being only intended to help to understand the present invention；Simultaneously for one of ordinary skill in the art, foundation
The thought of the present invention, the most all will change.In sum, this specification content is not
It is interpreted as limitation of the present invention.
Claims (8)
1. a large-size axis parts detection device, it is characterised in that including:
Measured axis supporting mechanism, described measured axis supporting mechanism includes support platform, is located at described support platform one end upper surface
Revolving dial, be located at the free slide rail of described support platform upper surface, be located at described free slide rail and along described free slide rail
The tailstock of movement, and be located at the guide rail of described support platform upper surface, described revolving dial be provided with first stir top, described
Tailstock be provided with second stir top, described first stir top with described second stir top for fixing measured axis；
Light transmission formula sensor group, described light transmission formula sensor group includes installing rack, is located at the top sensing on installing rack top
Device and be located at the lower sensor of described installing rack bottom, is moved even by slide block and described guide rail bottom described installing rack
Connect；
Grating scale, described grating scale and described guide rail parallel are fixed in described support platform, and described grating scale gauge outfit is located at institute
State on slide block.
Large-size axis parts the most according to claim 1 detection device, it is characterised in that described installing rack is gate,
Described upper sensor includes that top emitter and top receptor, described top emitter and top receptor are respectively arranged on institute
Stating in the gate two of installing rack at drift angle, described lower sensor includes that lower transmission device and top emitter, described bottom are sent out
Emitter and lower receiver are respectively arranged on the bottom of described gate two frame, described upper emitter and described lower emitter and are positioned at same
Side.
Large-size axis parts the most according to claim 1 and 2 detection device, it is characterised in that described upper sensor
It is picking sensor with described lower sensor.
Large-size axis parts the most according to claim 1 detection device, it is characterised in that described guide rail includes the most flat
The track of row setting and leading screw, described track is respectively arranged at two ends with the first limit switch and the second limit switch, described leading screw one
End connection has the first motor, described slide block to be located between described leading screw and described track.
Large-size axis parts the most according to claim 1 detection device, it is characterised in that described revolving dial connects to be had
Second motor.
6. the method that the large-size axis parts detection device that a kind utilizes described in claim 1 carries out detecting, it is characterised in that
Including:
Setting manufacturing tolerance Pe of measured axis, the design diameter of axle Di of each section of measured axis and design axial length Li, wherein i represents described quilt
Survey the hop count of axle；
Obtain calibrating parameters A；
Control the first electric machine rotation；
Obtain the position coordinates P3 of the gauge outfit detection of grating scale, build position coordinates array P3 [n]；
Obtain upper light curtain length P1 corresponding with described position coordinates P3 of light transmission formula sensor group detection and lower light curtain simultaneously
Length P2, builds upper light curtain length number group P1 [n] and lower light curtain length array P2 [n] respectively, and wherein n is the number of element；
According to calibrating parameters A, calculate top array P12 [n] of described upper light curtain length number group, in described top array P12 [n]
Each element P12=A-P1；
Respectively described top array P12 [n] and described lower light curtain length array P2 [n] are carried out finite difference, obtaining respectively
Difference array P ' 1, top [n] and difference array P ' 2, bottom [n]；
Obtain respectively in described difference array P ' 1, top [n] and described difference array P ' 2, bottom [n] more than manufacturing tolerance Pe
Element P ' 1jAnd P ' 2j, and with described element P ' 1jAnd P ' 2jCorresponding position coordinates P3j, wherein P ' 1jRepresent that described top is poor
Jth numerical value in fraction set P ' 1 [n], P ' 2jRepresent jth numerical value in described difference array P ' 2, bottom [n]；
Judge P ' 1j-P’1j-1Or P ' 1j-P’1j+1Whether more than 1mm, and judge P ' 2j-P’2j-1Or P ' 2j-P’2j+1Whether it is more than
1mm, if it is, determine P ' 1jAnd P ' 2jCorresponding position coordinates P3jFor waypoint；
Judge P ' 1j-P’1j-1Or P ' 1j-P’1j+1Whether less than 1mm, and judge P ' 2j-P’2j-1Or P ' 2j-P’2j+1Whether it is less than
1mm, if it is, determine P ' 1jAnd P ' 2jCorresponding position coordinates P3jFor defect point, record defect point；
Respectively described top array P12 [n] and described lower light curtain length array P2 [n] are carried out segmentation according to described waypoint,
Obtain multistage position coordinates subnumber group, and the top subnumber group corresponding with each fragment position coordinate subnumber group and lower light curtain length
Subnumber group；
The described top subnumber group corresponding to each section of described position coordinates subnumber group and described lower light curtain length subnumber group are respectively
Make fitting a straight line, obtain top subnumber group straight line l1 and lower light curtain length subnumber group straight line l2 respectively；
Calculate distance d between described top subnumber group straight line l1 and described lower light curtain length subnumber group straight line l2；Calculate described
Top subnumber group straight line l1 and average length l of described lower light curtain length subnumber group straight line l2；
Whether the difference of the design diameter of axle Di of the shaft part that judging distance d is corresponding with on measured axis is less than diameter of axle error threshold, if
It is to determine that the diameter of axle of this shaft part of measured axis is qualified, the most defective；Judge average length l shaft part corresponding with on measured axis
The difference of design axial length Li, whether less than axial length error threshold, if it is determines that the axial length of this shaft part of measured axis is qualified, no
The most defective.
Large-size axis parts the most according to claim 1 detection device, it is characterised in that described acquisition calibrating parameters A,
Specifically include:
Obtain the position coordinates P*3 of the standard axle of the gauge outfit detection of grating scale, build position coordinates array P*3 [n]；
Obtain upper light curtain length P* corresponding with described position coordinates P*3 of the standard axle of light transmission formula sensor group detection simultaneously
1 and lower light curtain length P*2；
Respectively described upper light curtain length P*1 and described lower light curtain length P*2 are carried out fitting a straight line, obtain long with described upper light curtain
The straight line J that degree P1 is corresponding1x+K1y+L1=0 straight line J corresponding with described lower light curtain length P22x+K2y+L2=0；
According to straight line J1x+K1y+L1=0 and J2x+K2y+L2=0 calibrating parameters A:
Wherein x is the abscissa value of Points on Straight Line, and y is
The ordinate value of Points on Straight Line, J1、K1、L1It is respectively upper light curtain and measures the straight line parameter of straight line, J2、K2、L2Measure for lower light curtain
The straight line parameter of straight line, R is the diameter of axle of standard axle, J=(J1+J2)/2, K=(K1-K2)/2。
Large-size axis parts the most according to claim 1 detection device, it is characterised in that described position coordinates array P3
[n], upper light curtain length number group P1 [n], lower light curtain length array P2 [n] and top array P12 [n] for identical one of length
Array.
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