CN107449348A - Inner diameter of cylinder sleeve high-precision large-range self-operated measuring unit and measuring method - Google Patents
Inner diameter of cylinder sleeve high-precision large-range self-operated measuring unit and measuring method Download PDFInfo
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- CN107449348A CN107449348A CN201710659945.8A CN201710659945A CN107449348A CN 107449348 A CN107449348 A CN 107449348A CN 201710659945 A CN201710659945 A CN 201710659945A CN 107449348 A CN107449348 A CN 107449348A
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- eddy current
- current sensor
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- round boss
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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
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/12—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring diameters
- G01B7/13—Internal 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
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/004—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring coordinates of points
- G01B7/008—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring coordinates of points using coordinate measuring machines
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- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The invention discloses a kind of inner diameter of cylinder sleeve high-precision large-range self-operated measuring unit, including three-pawl type base, round boss is provided with the center of three-pawl type base, base is mounted on inner panel and outside plate, the optical axis and leading screw of parallel distribution are provided between the inner plate and the outer plate, optical axis and leading screw both pass through L-type connector, power transmission shaft is installed in the space that three inner panels are formed, power transmission shaft and motor connection, power transmission shaft lower end is connected with drive bevel gear, drive bevel gear engages with three driven wheels of differential, driven wheel of differential is connected with leading screw, feed screw nut and eddy current sensor are installed with L-type connector, the magnetic grid ruler reading head of measurement displacement is installed on short side, magnetic scale is installed on three-pawl type base.The present invention is moved along a straight line using motor driven eddy current sensor, the real-time test position change of magnetic grid ruler reading head, so that it is guaranteed that eddy current sensor is constantly in best measurement position in face of different inner diameters cylinder jacket, surveying internal diameter principle by 3 points calculates internal diameter.
Description
Technical field
The present invention relates to inner diameter of cylinder sleeve high-precision large-range self-operated measuring unit and measuring method, belong to fields of measurement.
Background technology
One of cylinder jacket part the most severe as working environment on diesel engine, its everywhere internal diameter precision height it is direct
Affect the key technical index such as service life, the fuel economy of diesel engine.At present both at home and abroad for inner diameter of cylinder sleeve size
The method of detection has many kinds, is broadly divided into contact type measurement and non-contact measurement, and the method and principle that use are also
It is different.The inner diameter measurement method of cylinder jacket mainly includes：General gage measuring, special measuring tool measurement, inductance caliper are surveyed
Amount, air-gauge measurement etc..General measurer detection inner diameter of cylinder sleeve is simple to operate, but can only detect cylinder running-on
The internal diameter of shallower position near portion, equally, inductance measuring meter measure the shorter cylinder jacket that can only also fathom；Private volumn
Tool measurement is more efficient in the corresponding inner diameter of cylinder sleeve of measurement while ensure that precision to a certain extent, but its measurement range
It is smaller, function is single, then helpless when being related to the cylinder jacket of sizes specification；Although air-gauge detects measurement accuracy
It is higher and because it is non-contact measurement, and then measurement target cylinder set inner wall surface is protected, but air-gauge can not
Adjust measurement range and measurement expense is higher, higher to environmental requirement.
Yang Di, Zhang Lijun invention《A kind of high accuracy inner diameter of cylinder sleeve rapid measurement device》, Chinese invention patent Shen
Please the A of publication No. CN 106247885, by increasing the fibrous paper of subsidiary, improve inside micrometer measuring environment,
Effectively increase to a certain extent inside micrometer measurement repeatable accuracy and measurement efficiency, but due to its still be limited in
The complexity adjusted in the measurement efficiency and measurement process of footpath micrometer, the lifting of its measurement efficiency receive the limitation of increasing, though
Right improved efficiency is more obvious, but still to spend the more time to be used in the adjustment of device.Suzhou indigo plant king's machine tool
Science and Technology Ltd.'s invention《A kind of laser inside diameter measuring instrument》, the A of Chinese invention patent application publication No. CN 106152956,
Measured using high-precision laser, measurement accuracy is high and is not directly contacted with, and measurement process is to workpiece not damaged, but its detection range
It is smaller, the cylinder jacket in laser measuring apparatus detection range, and the more high then detection range of laser measuring apparatus precision can only be measured
It is smaller, when precision is ensured, its detection range size is further limit, simultaneously because laser measuring apparatus is optics instrument
Device, the requirement to environment is higher, can not ensure its stability and reliability in adverse circumstances.
The content of the invention
Goal of the invention：In order to overcome the deficiencies in the prior art, the present invention provides a kind of inner diameter of cylinder sleeve high accuracy
A wide range of self-operated measuring unit and measuring method, are moved along a straight line using motor driven eddy current sensor, and magnetic grid ruler reading head is real-time
Test position changes, so that it is guaranteed that eddy current sensor is constantly in best measurement position in face of different inner diameters cylinder jacket, passes through
Survey internal diameter principle at 3 points and calculate internal diameter.
Technical scheme：In order to solve the above technical problems, a kind of inner diameter of cylinder sleeve high-precision large-range of the present invention is surveyed automatically
Device, including three-pawl type base are measured, i.e., comprising first base, second base and the 3rd base, is set at the center of three-pawl type base
Have round boss, first base, second base and the 3rd base are circumferentially distributed along round boss, first base, second base and
Inner panel and outside plate are mounted on 3rd base, the optical axis and leading screw, leading screw between the inner plate and the outer plate provided with parallel distribution lead to
Cross bearing to be arranged between outside plate and inner panel, optical axis and leading screw both pass through L-type connector, and L-type connector includes vertical distribution
Short side and long side, short side pass through optical axis and leading screw, and power transmission shaft, power transmission shaft and electricity are provided with the space that three inner panels are formed
Machine connects, and power transmission shaft lower end is connected with drive bevel gear, and drive bevel gear engages with three driven wheels of differential, driven wheel of differential and
Leading screw connects, and feed screw nut is installed with short side, feed screw nut is enclosed on leading screw, and measurement distance is provided with long side
Eddy current sensor, be provided with short side measurement displacement magnetic grid ruler reading head, magnetic scale is installed on three-pawl type base；Mark
The fixed end for being located at the rectangular platform for needing to demarcate in three-pawl type base with perpendicular.
Preferably, the first base, second base and the 3rd base circumference uniform distribution are on round boss.
Preferably, the lower end of the outside plate is provided with circular groove, taper roll bearing, circular cone are installed in circular groove
Roller bearing inner ring is connected with leading screw.
Preferably, the driven wheel of differential is fixed on the end of leading screw by jump ring and key.
Preferably, it is cased with protective cover outside the three-pawl type base.
A kind of measuring method of above-mentioned inner diameter of cylinder sleeve high-precision large-range self-operated measuring unit, comprises the following steps：
A, eddy current sensor initial position is demarcated
1) three eddy current sensors have been used altogether in the present apparatus, the initial position of each eddy current sensor be both needed into
Rower is determined, and the initial position of eddy current sensor is the most short position of eddy current sensor extension elongation, by eddy current sensor
Initial position is moved to, while three magnetic grid ruler reading head reading numerical values are zeroed, is then placed into the present apparatus with test pose
In three-coordinates measuring machine, test pose is the upward posture of round boss, because three eddy current sensor offices are in three-pawl type
In three rectangular platforms of base, three rectangular platforms are first base, second base and the 3rd base, so for each
The initial position demarcation of eddy current sensor needs separately to carry out, and selects a rectangular platform in three rectangular platforms to be defined as
K1, it is K thus to define remaining two rectangular platform successively clockwise2、K3；
2) demarcation of eddy current sensor initial position selects a demarcation perpendicular and adjusted in three-coordinates measuring machine
It is whole its relative to the present apparatus relative position, wherein by K1The face parallel with eddy current sensor detection faces definition in rectangular platform
For F1Face, K1In rectangular platform in eddy current sensor test point and three-pawl type base the theoretical line in the center of circle of round boss with
F1Face is vertical, and demarcation is brought into close contact in F with the positioning in perpendicular with surface1Face uses three-coordinates measuring machine measurement three-jaw
3 points of round boss circumference, are designated as Z respectively in formula base11(a11,b11)、Z12(a12,b12)、Z13(a13,b13), due to not existing
3 points on same straight line determine a circle, and then calculate the central coordinate of circle of round boss in three-pawl type base, are designated as O1
(aq1,bq1), use two points of horizontal distribution on demarcation surface in Three-coordinate measurer measurement demarcation perpendicular
F1’、F1", by this 2 points and O1Calculated in the same plane, cross O1It is the straight line perpendicular with this 2 lines, Jin Erke
P is designated as to calculate the intersection point of two straight lines1(ap1,bp1), it is known that point O1With point P1Coordinate, according to distance between two points formula in plane
And then calculate O1P1Length, herein O1P1Length is the distance between round boss axis and demarcation perpendicular；
3) motor is started, driving eddy current sensor is moved to close to demarcation with perpendicular direction, until vortex flow passes
Sensor reading numerical values stop in eddy current sensor measurement range centre position or so, motor, now read K1In rectangular platform
Eddy current sensor reading numerical values are designated as D1, read K1Magnetic grid ruler reading head numerical value is designated as B in rectangular platform1；Drive three-dimensional coordinates measurement
Clamping device in instrument, the present apparatus is rotated around round boss axis, stop after 120 ° of rotation, now K2Whirlpool in rectangular platform
Current sensor test point uses perpendicular normal phase with the theoretical line in the center of circle of round boss in three-pawl type base and demarcation
It is parallel, read K2Eddy current sensor reading numerical values are designated as D in rectangular platform2, read K2Magnetic grid ruler reading head numerical value in rectangular platform
It is designated as B2；The clamping device in three-coordinates measuring machine is driven, the present apparatus is rotated around round boss axis, is stopped after 120 ° of rotation
Only, now K3In rectangular platform in eddy current sensor test point and three-pawl type base the theoretical line in the center of circle of round boss and
Demarcation is parallel with perpendicular normal, reads K3Eddy current sensor reading numerical values are designated as D in rectangular platform3, read K3Rectangle
Magnetic grid ruler reading head numerical value is designated as B on platform3；
4) K is remembered1Eddy current sensor initial position is point Z in rectangular platform21, eddy current sensor reading numerical values are in whirlpool electricity
Eddy current sensor position is point Z when flow sensor measurement range centre position or so stops31；Remember K2Whirlpool in rectangular platform
Current sensor initial position is point Z22, eddy current sensor reading numerical values are on an eddy current sensor measurement range centre position left side
Eddy current sensor position is point Z during right stopping32；Remember K3Eddy current sensor initial position is point Z in rectangular platform23,
Eddy current sensor reading numerical values are when eddy current sensor measurement range centre position or so stops where eddy current sensor
Position is point Z33, then Z21Z31Length is equal to B1, Z31P1Length is equal to D1；Z22Z32Length is equal to B2, Z32P1Length is equal to D2；
Z23Z33Length is equal to B3, Z33P1Length is equal to D3, thus calculate K1Eddy current sensor initial position S in rectangular platform1, i.e.,
For O1Z21；Calculate K2Eddy current sensor initial position S in rectangular platform2, as O1Z22；Calculate K1Whirlpool in rectangular platform
Current sensor initial position S3, as O1Z23, it is shown below：
S1=O1Z21=O1P1-Z21Z31-Z31P1
S2=O1Z22=O1P1-Z22Z32-Z32P1
S3=O1Z23=O1P1-Z23Z33-Z33P1
Thus it is respectively S to calibrate eddy current sensor initial position1、S2、S3；
B, inner diameter of cylinder sleeve is detected
When detecting the cylinder jacket in the range of range, eddy current sensor is adjusted by actuating unit and returns to initial position,
Then the absorption end of magnetic bases is adsorbed onto on the round boss of three-pawl type base bottom, the fixing end of magnetic bases is installed
Onto toolframe, present apparatus position is controlled to adjust by machine tool program, it is reached in cylinder jacket theoretical axis, adjusts vortex flow
Sensing station makes the distance of itself and cylinder liner internal wall be in eddy current sensor detection range, then controls under single unit system
Dropping to inside cylinder jacket needs the height for measuring internal diameter, motor regulation eddy current sensor position is opened, until vortex flow
The sensor number of degrees stop after starting change, measure inner diameter of cylinder sleeve size in real time, can obtain three eddy current sensors respectively
Readings D1,D2,D3With the readings B of three magnetic grid ruler reading heads1,B2,B3；
C, inner diameter of cylinder sleeve calculates
Eddy current sensor test point connects with the theoretical of the center of circle of round boss in three-pawl type base in three rectangular platforms
Three intersection points of line and cylinder liner internal wall, are designated as point P respectively1、P2、P3, using the center of circle O of round boss in three-pawl type base as
Origin, OP1Line crosses origin perpendicular to OP as X-axis1The straight line of line to the right is defined as Y-axis, according to each rectangular platform whirlpool electricity
Flow sensor initial position calibration value S1、S2、S3Three luminous point P can be calculated1、P2、P3To the length OP of origin1、OP2、OP3,
Due to OP1、OP2、OP3Three straight lines are uniformly distributed in 120 ° and pass through origin, and then can calculate the coordinate of three luminous points
Value P1(a1, b1), P2(a2, b2), P1(a3, b3), wherein：
a1=OP1, b1=0
Three points in known rounded edge, can calculate round radius, and then calculate the big of inner diameter of cylinder sleeve herein
It is small, with the movement of overall measurement apparatus, the diameter of different depth can be measured.
Beneficial effect：Compared with prior art, the present invention has advantages below：
(1) present invention uses adjustable structure, realizes the accurate adjustment of eddy current sensor position, effectively increases this
The measurement range of device, compared with measurement range identical measurement apparatus, that is, reduce cost and improve measurement accuracy again.
(2) present invention is detected using eddy current sensor, and higher measurement essence can be still kept in adverse circumstances
Degree and reliability；Eddy current sensor and magnetic railings ruler are used cooperatively simultaneously, can accurately detect the displacement of eddy current sensor,
So as to further improve the measurement accuracy of the present invention.
Brief description of the drawings
Fig. 1 is the structural representation of apparatus of the present invention.
Fig. 2 is that apparatus of the present invention remove the structural representation after protective cover.
Fig. 3 is the position adjusting mechanism front view of apparatus of the present invention.
Fig. 4 is that eddy current sensor initial position demarcates schematic diagram in apparatus of the present invention measuring method.
Fig. 5 is eddy current sensor initial position scaling method schematic diagram in apparatus of the present invention measuring method.
Fig. 6 is that apparatus of the present invention measure cylinder jacket schematic diagram.
Wherein：1- three-pawl type bases, 2- inner panels, 3- outside plates, 4- motor cabinets, 5- stepper motors, 6- bevel gears, 7- positions are adjusted
Save mechanism, 71-L shape plates, 72- leading screws, 721- feed screw nuts, 73- optical axises, 731- bearing (ball) covers, 74- eddy current sensors, 75-
Magnetic grid ruler reading head, 751- magnetic scales, 76- cylinder roller bearings, 761- bearing caps, 78- jump rings, 79- taper roll bearings, 8- protection
Cover, 9- demarcation perpendiculars.
Embodiment
As shown in Figures 1 to 6, a kind of inner diameter of cylinder sleeve high-precision large-range self-operated measuring unit of the invention includes three-jaw
Formula base 1, position adjusting mechanism 7, actuating unit, protective cover 8, eddy current sensor 74, magnetic grid ruler reading head 75, demarcation is with vertically
Plane 9.
As shown in Figure 1 and Figure 2, the three-pawl type base 1, profile are in three-jaw style, comprising first base, second base and
3rd base, centre is round boss, and round boss is downwardly projected, and wherein round boss upper end processes a hexagonal indentations, makes
Three sides of hexagonal indentations it is vertical with three-jaw direction, three directions of decile around it, each extend over away three it is identical
The rectangular platform of size, in one square groove of the end of rectangular platform processing, square groove size and link position governor motion 7
The size of outside plate 3 is matched, and counterbore is processed from the opposite side of square trench bottom, to fixed position connect in governor motion 7 it is outer
Plate 3, each rectangular platform extend a segment distance in paste position governor motion 7 magnetic scale 751, center circle on the right side of it
Platform respectively processes two counterbores in the direction of three decile pawls, in installation site governor motion 7 inner panel 2, in three decile pawls
Side thread mill drilling.
Should it mutually be in circumferentially 120 ° as shown in Fig. 2 processing through hole in 1 each rectangular platform of three-pawl type base
Distribution, the side of three decile pawls in three-pawl type base 1 are threaded hole, the respectively processing one of the end positions of protective cover 8
To screwed hole.Protective cover 8 is connected by screwed hole with the screwed hole of three decile pawl sides, in order that protective cover 8 fills with measurement
Put and be preferably bonded, protective cover 8 is also three-pawl type structure
As shown in Fig. 3, Fig. 4, Fig. 5, the position adjusting mechanism includes bevel gear 6, inner panel 2, taper roll bearing 79,
Cylinder roller bearing 76, bearing cap 761, screw mandrel 72, magnetic grid ruler reading head 75, L shaped plate 71, optical axis 73, linear bearing, outside plate 3, silk
Thick stick nut 721, eddy current sensor 74 and magnetic scale 751.The magnetic grid ruler reading head 75 is a selected displacement detecting sensor；It is described
Magnetic scale 751 is used cooperatively with magnetic grid ruler reading head 75, for the displacement of test position governor motion 7；The eddy current sensor 74
For a selected distance detection sensor；The upper end open-blind hole of outside plate 3, diameter coincide with the size of optical axis 73, to install optical axis
73, circular groove diameter and depth and the taper roll bearing 79 of the lower end of outside plate 3 coincide, to install taper roll bearing 79,
The inner ring of taper roll bearing 79 is connected with leading screw 72, and two screwed holes are opened in bottom, is opened with the end of the rectangular platform of three-pawl type base 1
Hole coincide；The upper end open-blind hole of inner panel 2, diameter coincide with the size of optical axis 73, lower end processing shoulder hole, to install cylinder rolling
Sub- bearing 76, bottom thread mill drilling, it is coincide with the round platform position through hole of three-pawl type base 1, top thread mill drilling and bottom spiral shell
Pit position correspondence；The 71 long end of L shaped plate is horizontal attitude, and short end is vertical posture, and short end is thicker, wherein on the outside of short end
Through hole is processed, size matches with feed screw nut size, and inner side processing through hole, size matches with linear bearing size, short end
Side processes two screwed holes, to connect magnetic grid ruler reading head 75；Two screwed holes of processing at the top of long end, to connect vortex flow sensing
Device 74, two screw thread hole sites should ensure that the test side of eddy current sensor 74 with being flushed at the top of 71 long end of L shaped plate；Optical axis 73 passes through
Linear bearing in L plate inboard apertures, wherein linear bearing are fixed by two bearings end cap 731, and two bearings end cap 731 respectively passes through 4
Screw is linked with L shaped plate 71, and the other end of optical axis 73 is arranged in the blind hole of the upper end of inner panel 2；Leading screw 72 through feed screw nut with
Cylinder roller bearing 76 in the lower end circular groove of inner panel 2 coordinates, and the used key connection in end is connected with bevel gear 6 and using card
Spring 78 is fixed, and the used bearing (ball) cover 731 of the cylinder roller bearing 76 on inner panel 2 is fixed on inner panel 2, wherein described
The nut of leading screw 72 is fixed in 71 outer side through hole of L shaped plate by four screwed holes；Two screwed holes are opened in the side of L shaped plate 71, to even
Magnetic grid ruler reading head 75 is connect, two screwed holes are opened at the top of L shaped plate 71, to connect eddy current sensor 74.The position adjusting mechanism 7
Totally three, on the three-pawl type base 1.
As shown in figure 1, the actuating unit includes stepper motor 5, motor cabinet 4, shaft coupling, power transmission shaft, the stepping electricity
Machine is a selected standard stepper motor, and stepper motor 5 is arranged on motor cabinet 4, one circular groove of the top of motor cabinet 4 processing
It is used to fix stepper motor 5 with four screwed holes, while the top of motor cabinet 4 is opened corresponding to the screw top hole site of inner panel 2
Counterbore, is connected for being installed with inner panel 2, and identical hexagonal indentations are opened in the lower end of motor cabinet 4 corresponding to three-pawl type base 1 so that
Three inner panels 2 coordinate the installation of hexagonal indentations edge can be into 120 ° of distributions and perpendicular to three-jaw stretching direction；The shaft coupling
For a tubular member, inwall is machined with keyway corresponding to stepper motor shaft key groove position, and step motor shaft is by shaft coupling with passing
Moving axis connects.The power transmission shaft top splines for being connected with shaft coupling, and bottom is the structure of bevel gear 6, power transmission shaft bottom
Bevel gear 6 is engaged with three bevel gears 6 in the distribution of 120 even angles, and power is transmitted to three position adjusting mechanisms 7.
In the present invention, the demarcation perpendicular 9 is a L shaped plate, and its long end is demarcation one end, long end medial surface
For demarcation surface, its short end is positioning one end, and short end top end surface is positioning surface, and positioning surface is parallel to demarcation
Use surface.
The present apparatus is described further exemplified by measuring diameter 150-360mm cylinder jacket.
The present apparatus is measurable range device, according to diameter change scope, selectes eddy current sensor 74, the vortex flow passes
The measurement range of sensor 74 is 0-10mm, range 10mm, because the measurement range of the present apparatus has continuity, so detection range
It is then 150-360mm.
1st, the initial position of eddy current sensor 74 is demarcated
1) had altogether in the present apparatus and used three eddy current sensors 74, the initial position of each eddy current sensor 74 is equal
It need to be demarcated, the initial position of eddy current sensor 74 is the most short position of the extension elongation of eddy current sensor 74, simultaneously will
The present apparatus, is then placed into three-coordinates measuring machine, detected by three reading numerical values of magnetic grid ruler reading head 75 zeros with test pose
Posture is the upward posture of round boss.Because three offices of eddy current sensor 74 are in three rectangular platforms of three-pawl type base
On, so the initial position demarcation for each eddy current sensor 74 needs separately to carry out, select in three rectangular platforms
One rectangular platform is defined as K1, it is K thus to define remaining two rectangular platform successively clockwise2、K3。
2) initial position of eddy current sensor 74 is demarcated：A demarcation perpendicular 9 is selected in three-coordinates measuring machine
And its relative position relative to the present apparatus is adjusted, wherein by K1It is parallel with the detection faces of eddy current sensor 74 in rectangular platform
Face is defined as F1Face, K1The test point of eddy current sensor 74 and the reason in the center of circle of round boss in three-pawl type base 1 in rectangular platform
By line and F1Face is vertical, and demarcation is brought into close contact in F with the positioning in perpendicular 9 with surface1Face uses three-coordinates measuring machine
3 points of round boss circumference in three-pawl type base 1 are measured, are designated as Z respectively11(a11,b11)、 Z12(a12,b12)、Z13(a13,
b13), because 3 points being not arranged on the same straight line determine a circle, and then calculate the circle of round boss in three-pawl type base 1
Heart coordinate, is designated as O1(aq1,bq1), using Three-coordinate measurer measure demarcation with perpendicular 9 on demarcation surface it is horizontal
Two point F of distribution1’、F1", by this 2 points and O1Calculated in the same plane, cross O1Do perpendicular with this 2 lines
Straight line, and then the intersection point that can calculate two straight lines is designated as P1(ap1,bp1), it is known that point O1With point P1Coordinate, according in plane
Distance between two points formula and then calculate O1P1Length, herein O1P1Length is that round boss axis is put down with demarcation with vertical
The distance between face 9；
3) stepper motor 5 in actuating unit is started, activation point governor motion 7 adjusts eddy current sensor 74 to close
Demarcation is moved with the direction of perpendicular 9, until the reading numerical values of eddy current sensor 74 are left in 5mm in eddy current sensor readings
The right side, stop actuating unit.Now read K1The reading numerical values of eddy current sensor 74 are designated as D in rectangular platform1, read K1Rectangle is put down
The numerical value of magnetic grid ruler reading head 75 is designated as B on platform1；The clamping device in three-coordinates measuring machine is driven, makes whole adjustable cylinder set internal diameter
Measurement apparatus can rotate around round boss axis, stop after 120 ° of rotation, now K2Eddy current sensor in rectangular platform
74 test points are parallel with the normal of perpendicular 9 with the theoretical line in the center of circle of round boss in three-pawl type base 1 and demarcation, read
Take K2The reading numerical values of eddy current sensor 74 are designated as D in rectangular platform2, read K2The numerical value of magnetic grid ruler reading head 75 is remembered in rectangular platform
For B2；The clamping device in three-coordinates measuring machine is driven, whole adjustable cylinder is covered inner diameter measuring device around round boss
Axis rotates, and stops after 120 ° of rotation, now K3In rectangular platform in the test point of eddy current sensor 74 and three-pawl type base 1
The theoretical line in the center of circle of round boss is parallel with the normal of perpendicular 9 with demarcation, reads K3Vortex flow passes in rectangular platform
The reading numerical values of sensor 74 are designated as D3, read K3The numerical value of magnetic grid ruler reading head 75 is designated as B in rectangular platform3。
4) K is remembered1The initial position of eddy current sensor 74 is point Z in rectangular platform21, the reading numerical values of eddy current sensor 74 exist
The position of eddy current sensor 74 is point Z when 5mm or so stops31；Remember K2The initial bit of eddy current sensor 74 in rectangular platform
It is set to point Z22, the reading numerical values of eddy current sensor 74 position of eddy current sensor 74 when 5mm or so stops is point Z32；
Remember K3The initial position of eddy current sensor 74 is point Z in rectangular platform23, the reading numerical values of eddy current sensor 74 stop in 5mm or so
The position of eddy current sensor 74 is point Z when only33.Then Z21Z31Length is equal to B1, Z31P1Length is equal to D1；Z22Z32Length etc.
In B2, Z32P1Length is equal to D2；Z23Z33Length is equal to B3, Z33P1Length is equal to D3.It is possible thereby to calculate K1Whirlpool in rectangular platform
The initial position S of current sensor 741, as O1Z21；K can be calculated2The initial position of eddy current sensor 74 in rectangular platform
S2, as O1Z22；K can be calculated1The initial position S of eddy current sensor 74 in rectangular platform3, as O1Z23, such as following formula institute
Show：
S1=O1Z21=O1P1-Z21Z31-Z31P1
S2=O1Z22=O1P1-Z22Z32-Z32P1
S3=O1Z23=O1P1-Z23Z33-Z33P1
Thus it is respectively S to calibrate the initial position of eddy current sensor 741、S2、S3。
2nd, inner diameter of cylinder sleeve is detected
When detecting the cylinder jacket in the range of range, eddy current sensor 74 is adjusted by actuating unit and returns to initial bit
Put, then the absorption end of magnetic bases is adsorbed onto on the round boss of three-pawl type base bottom, by the fixing end of magnetic bases
It is installed on toolframe, present apparatus position is controlled to adjust by machine tool program, it is reached in cylinder jacket theoretical axis, adjusts whirlpool
The position of current sensor 74 makes the distance of itself and cylinder liner internal wall be in 0~10mm of eddy current sensor detection range, then
Control single unit system, which drops to inside cylinder jacket, needs the height for measuring internal diameter, the mechanism that turns on the power regulation vortex flow sensing
The position of device 74, until the reading of eddy current sensor 74 starts change and stopped, inner diameter of cylinder sleeve size is measured in real time, can be obtained respectively
The readings D of three eddy current sensors 741,D2,D3With the readings B of three magnetic grid ruler reading heads 751,B2,B3；
3rd, inner diameter of cylinder sleeve is calculated
The test point of eddy current sensor 74 and the theory in the center of circle of round boss in three-pawl type base 1 in three rectangular platforms
Three intersection points of line and cylinder liner internal wall, are designated as point P respectively1、P2、P3, the center of circle O of round boss in three-pawl type base 1 is made
For origin, OP1Line crosses origin perpendicular to OP as X-axis1The straight line of line to the right is defined as Y-axis, according to each rectangular platform whirlpool
The initial position calibration value S of current sensor 741、S2、S3Three luminous point P can be calculated1、P2、P3To the length OP of origin1、OP2、
OP3, due to OP1、OP2、OP3Three straight lines are uniformly distributed in 120 ° and pass through origin, and then can calculate three luminous points
Coordinate value P1(a1, b1), P2(a2, b2), P1(a3, b3), wherein：
a1=OP1, b1=0
Three points in known rounded edge, can calculate round radius, and then calculate the big of inner diameter of cylinder sleeve herein
It is small, with the movement of overall measurement apparatus, the diameter of different depth can be measured.Toolframe is kept toolframe is managed around cylinder
Rotated by axis, the bounce of inner diameter of cylinder sleeve in this height can be measured.
Described above is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (6)
- A kind of 1. inner diameter of cylinder sleeve high-precision large-range self-operated measuring unit, it is characterised in that：Including three-pawl type base, that is, include First base, second base and the 3rd base, round boss, first base, second base are provided with the center of three-pawl type base It is circumferentially distributed along round boss with the 3rd base, inner panel and outside plate are mounted on first base, second base and the 3rd base, The optical axis and leading screw of parallel distribution are provided between the inner plate and the outer plate, and leading screw is arranged between outside plate and inner panel by bearing, light Axle and leading screw both pass through L-type connector, and L-type connector includes the short side and long side of vertical distribution, and short side passes through optical axis and leading screw, Power transmission shaft, power transmission shaft and motor connection, power transmission shaft lower end and drive bevel gear are installed in the space that three inner panels are formed Connection, drive bevel gear are engaged with three driven wheels of differential, and driven wheel of differential is connected with leading screw, and silk is installed with short side Thick stick nut, feed screw nut are enclosed on leading screw, and the eddy current sensor of measurement distance is provided with long side, is provided with short side The magnetic grid ruler reading head of displacement is measured, magnetic scale is installed on three-pawl type base.
- 2. inner diameter of cylinder sleeve high-precision large-range self-operated measuring unit according to claim 1, it is characterised in that：Described One base, second base and the 3rd base circumference uniform distribution are on round boss.
- 3. inner diameter of cylinder sleeve high-precision large-range self-operated measuring unit according to claim 1, it is characterised in that：It is described outer The lower end of plate is provided with circular groove, is provided with taper roll bearing in circular groove, tapered roller bearing internal ring is connected with leading screw.
- 4. inner diameter of cylinder sleeve high-precision large-range self-operated measuring unit according to claim 1, it is characterised in that：It is described from Dynamic bevel gear is fixed on the end of leading screw by jump ring and key.
- 5. inner diameter of cylinder sleeve high-precision large-range self-operated measuring unit according to claim 1, it is characterised in that：Described three Protective cover is cased with outside claw base.
- A kind of 6. measurement of inner diameter of cylinder sleeve high-precision large-range self-operated measuring unit as described in any one of claim 1 to 5 Method, it is characterised in that comprise the following steps：A, eddy current sensor initial position is demarcated1) three eddy current sensors have been used altogether in the present apparatus, the initial position of each eddy current sensor is both needed into rower Fixed, the initial position of eddy current sensor is the most short position of eddy current sensor extension elongation, and eddy current sensor is moved It is zeroed to initial position, while by three magnetic grid ruler reading head reading numerical values, the present apparatus is then placed into three seats with test pose Mark in measuring instrument, test pose is the upward posture of round boss, because three eddy current sensor offices are in three-pawl type base Three rectangular platforms on, three rectangular platforms are first base, second base and the 3rd base, select three rectangular platforms In a rectangular platform be defined as K1, it is K thus to define remaining two rectangular platform successively clockwise2、K3；2) eddy current sensor initial position is demarcated：A demarcation perpendicular is selected in three-coordinates measuring machine and adjusts it Relative to the relative position of the present apparatus, wherein by K1The face parallel with vortex flow detector detection faces is defined as F in rectangular platform1 Face, K1Eddy current sensor test point and the theoretical line and F in the center of circle of round boss in three-pawl type base in rectangular platform1Face Vertically, demarcation is brought into close contact in F with the positioning in perpendicular with surface1Face uses three-coordinates measuring machine measurement three-pawl type bottom 3 points of round boss circumference, are designated as Z respectively in seat11(a11,b11)、Z12(a12,b12)、Z13(a13,b13), due to not same 3 points on bar straight line determine a circle, and then calculate the central coordinate of circle of round boss in three-pawl type base, are designated as O1(aq1, bq1), use two point F of horizontal distribution on demarcation surface in Three-coordinate measurer measurement demarcation perpendicular1’、 F1", by this 2 points and O1Calculated in the same plane, cross O1The straight line perpendicular with this 2 lines is done, and then can be counted The intersection point for calculating two straight lines is designated as P1(ap1,bp1), it is known that point O1With point P1Coordinate, according to distance between two points formula in plane and then Calculate O1P1Length, herein O1P1Length is the distance between round boss axis and demarcation perpendicular；3) motor is started, driving eddy current sensor is moved to close to demarcation with perpendicular direction, until eddy current sensor Reading numerical values stop in eddy current sensor measurement range centre position or so, motor, now read K1Whirlpool electricity in rectangular platform Flow sensor reading numerical values are designated as D1, read K1Magnetic grid ruler reading head numerical value is designated as B in rectangular platform1；Drive in three-coordinates measuring machine Clamping device, the present apparatus is rotated around round boss axis, stop after 120 ° of rotation, now K2Vortex flow in rectangular platform Sensor test point is parallel with perpendicular normal with the theoretical line in the center of circle of round boss in three-pawl type base and demarcation, Read K2Eddy current sensor reading numerical values are designated as D in rectangular platform2, read K2Magnetic grid ruler reading head numerical value is designated as in rectangular platform B2；The clamping device in three-coordinates measuring machine is driven, the present apparatus is rotated around round boss axis, is stopped after 120 ° of rotation, Now K3Eddy current sensor test point and the theoretical line and mark in the center of circle of round boss in three-pawl type base in rectangular platform Surely it is parallel with perpendicular normal, read K3Eddy current sensor reading numerical values are designated as D in rectangular platform3, read K3Rectangle is put down Magnetic grid ruler reading head numerical value is designated as B on platform3；4) K is remembered1Eddy current sensor initial position is point Z in rectangular platform21, eddy current sensor reading numerical values are in vortex flow biography Eddy current sensor position is point Z when sensor measurement range centre position or so stops31；Remember K2Vortex flow in rectangular platform Sensor initial position is point Z22, eddy current sensor reading numerical values stop in eddy current sensor measurement range centre position or so Eddy current sensor position is point Z when only32；Remember K3Eddy current sensor initial position is point Z in rectangular platform23, whirlpool electricity Flow sensor reading numerical values eddy current sensor position when eddy current sensor measurement range centre position or so stops For point Z33, then Z21Z31Length is equal to B1, Z31P1Length is equal to D1；Z22Z32Length is equal to B2, Z32P1Length is equal to D2；Z23Z33It is long Degree is equal to B3, Z33P1Length is equal to D3, thus calculate K1Eddy current sensor initial position S in rectangular platform1, as O1Z21； Calculate K2Eddy current sensor initial position S in rectangular platform2, as O1Z22；Calculate K1Vortex flow senses in rectangular platform Device initial position S3, as O1Z23, it is shown below：S1=O1Z21=O1P1-Z21Z31-Z31P1S2=O1Z22=O1P1-Z22Z32-Z32P1S3=O1Z23=O1P1-Z23Z33-Z33P1Thus it is respectively S to calibrate eddy current sensor initial position1、S2、S3；B, inner diameter of cylinder sleeve is detectedWhen detecting the cylinder jacket in the range of range, eddy current sensor is adjusted by actuating unit and returns to initial position, then The absorption end of magnetic bases is adsorbed onto on the round boss of three-pawl type base bottom, the fixing end of magnetic bases is installed to knife Have on frame, present apparatus position is controlled to adjust by machine tool program, it is reached in cylinder jacket theoretical axis, regulation vortex flow sensing Device position makes the distance of itself and cylinder liner internal wall be in eddy current sensor detection range, then controls single unit system to drop to Need to measure the height of internal diameter inside cylinder jacket, motor regulation eddy current sensor position is opened, until vortex flow senses Tolerance number stops after starting change, measures inner diameter of cylinder sleeve size in real time, can obtain the readings of three eddy current sensors respectively D1,D2,D3With the readings B of three magnetic grid ruler reading heads1,B2,B3；C, inner diameter of cylinder sleeve calculatesIn three rectangular platforms in eddy current sensor test point and three-pawl type base the theoretical line in the center of circle of round boss and Three intersection points of cylinder liner internal wall, are designated as point P respectively1、P2、P3, using the center of circle O of round boss in three-pawl type base as origin, OP1Line crosses origin perpendicular to OP as X-axis1The straight line of line to the right is defined as Y-axis, is sensed according to each rectangular platform vortex flow Device initial position calibration value S1、S2、S3Three luminous point P can be calculated1、P2、P3To the length OP of origin1、OP2、OP3, due to OP1、OP2、OP3Three straight lines are uniformly distributed in 120 ° and pass through origin, and then can calculate the coordinate value P of three luminous points1 (a1, b1), P2(a2, b2), P1(a3, b3), wherein：a1=OP1, b1=0Three points in known rounded edge, can calculate round radius, and then calculate the size of inner diameter of cylinder sleeve herein, with The movement of overall measurement apparatus, the diameter of different depth can be measured.
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| DE102019129526A1 (en) | 2019-10-31 | 2019-12-19 | FEV Group GmbH | Displacement sensor for measuring a cylinder liner of an internal combustion engine |
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