CN107907071A - A kind of slave mode bearing groove measurer for curvity radius and method - Google Patents

A kind of slave mode bearing groove measurer for curvity radius and method Download PDF

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Publication number
CN107907071A
CN107907071A CN201711220813.1A CN201711220813A CN107907071A CN 107907071 A CN107907071 A CN 107907071A CN 201711220813 A CN201711220813 A CN 201711220813A CN 107907071 A CN107907071 A CN 107907071A
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China
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mounting platform
measured
fixture
bearing ring
fixture mounting
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CN201711220813.1A
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CN107907071B (en
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熊建桥
朱倩文
谢艳
沈小成
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Nanjing Institute of Technology
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Nanjing Institute of Technology
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00Measuring arrangements characterised by the use of optical means
    • G01B11/24Measuring arrangements characterised by the use of optical means for measuring contours or curvatures
    • G01B11/255Measuring arrangements characterised by the use of optical means for measuring contours or curvatures for measuring radius of curvature

Abstract

The present invention is a kind of slave mode bearing groove measurer for curvity radius, measuring device includes measuring table, fixture mounting platform is provided with above measuring table, the fixture of several clampings bearing ring to be measured is additionally provided with fixture mounting platform, fixture includes three claws, fixture pinion gear and the clamp motor for controlling fixture tense-lax bearing ring to be measured, bearing ring to be measured is placed in the top of fixture mounting platform, the ball screw of motor drive rotation is provided with through fixture mounting platform and bearing ring to be measured, motor drives fixture mounting platform to move up and down, gear wheel is also set up on ball screw, three three claws in 120 degree of friendships are set on gear wheel, Z-direction displacement sensor is against fixture mounting platform bottom surface, X is against to the gauge head of displacement sensor on the raceway groove of bearing ring to be measured.The present invention devises the mechanical structure of uniqueness, and overall process is controlled by computer, obtains more accurate result precision higher, more efficient.

Description

A kind of slave mode bearing groove measurer for curvity radius and method
Technical field
The invention belongs to field of engineering technology, more particularly to a kind of slave mode bearing groove measurer for curvity radius and side Method.
Background technology
Bearing is very important base parts and components in modern industry, and ball bearing is the axis that one of which is most widely used Hold, milling radius is the important performance indexes of ball bearing, and the milling radius and ditch shape deviation of ball bearing are to influence axis An important factor for dynamic properties such as running accuracy, clearance, contact angle, vibration noise and the moment of friction held, and then influence to be equipped with The operation of a machine precision of the bearing.Ball bearing channel radius of curvature is interior (outer) the circle axial cross section interior raceway groove profile of ball bearing The arc radius of line, as shown in Figure 1.Domestic commonly used ball bearing channel curvature radius measurement method is non-digitalization at present Or non-dedicated, existing measuring method:(1)Bulb scrapes color method, and it is first uniformly to be applied to raceway groove with red that bulb, which scrapes color method, On, then firmly scraped with corresponding steel ball from raceway groove, bearing quality is judged by the analysis to scratch state, belongs to qualitative Measurement.Advantage:It is easy to operate, it is of low cost;Shortcoming:It can not obtain measurement data, low precision;(2)Contour measurement, pass through by Tested raceway groove axial cross section relatively measures milling radius compared with ideal circle-arc, belongs to quantitative measurment.Advantage:Precision is high, The radius error of indication is ± 4.5um;Shortcoming:Time is grown, and efficiency is low;(3)There is the axis based on rectangular co-ordinate measuring method in foreign countries Groove curvature measuring instrument to be held, belongs to contour measuring method, precision can reach 2.0um, and form error precision can reach 0.5um, from Dynamic time of measuring is 20s.
Also there are many problems and limitation in terms of existing measurement ball bearing channel radius of curvature measurement, measurement accuracy is with surveying Amount efficiency is difficult to take into account, and has much room for improvement and perfect.
The content of the invention
To solve the above-mentioned problems, the present invention provides one kind to have high efficiency and high-precision bearing channel radius of curvature Measuring instrument and measuring method, can improve factory process manufacturing line upper bearing (metal) milling radius measurement level, improve axis Quality is held, is had great importance.
In order to achieve the above object, the present invention is achieved by the following technical solutions:
The present invention is a kind of slave mode bearing groove measurer for curvity radius, and measuring device includes measuring table, in measuring table Top is provided with fixture mounting platform, and the fixture of several clampings bearing ring to be measured is additionally provided with fixture mounting platform, folder Tool includes three claws, fixture pinion gear and the clamp motor for controlling fixture tense-lax bearing ring to be measured, bearing ring to be measured The top of fixture mounting platform is placed in, being provided with motor through fixture mounting platform and bearing ring to be measured drives rotation Ball screw, motor drive fixture mounting platform move up and down, gear wheel is also set up on ball screw, is set on gear wheel Three three claws in 120 degree of friendships are put, Z-direction displacement sensor is against fixture mounting platform bottom surface, surveys of the X to displacement sensor Head is against on the raceway groove of bearing ring to be measured.
The present invention is a kind of measuring method of slave mode bearing Contact stress, and the measuring method includes the following steps:
A, bearing ring to be measured is installed on the fixture mounting platform, the clamping motor that clamp unclamps workpiece rotates forward, band Dynamic pinion rotation, pinion gear drive bull gear drive, and three three claws in 120 degree of angles are by bearing holder (housing, cover) to be measured on gear wheel Enclose automatic centering to clamp, X is just against on the raceway groove of bearing ring to be measured to the gauge head of displacement sensor at this time, and Z-direction displacement passes Sensor is against on the bottom surface of fixture mounting platform;
B, measurement starts, and the motor, which rotates, drives ball screw to rotate, and drives the fixture installation on the ball screw Platform moves up and down, and fluctuation range is limited in raceway groove measurement request, and at this time, X is to displacement sensor and Z-direction displacement sensing Device just collects measurement data in real time, and calculating output finally by control software obtains bearing groove radius of curvature R.
The beneficial effects of the invention are as follows:The present invention devises the mechanical structure of uniqueness, and overall process is controlled by computer, mainly Sensor is high-precision grating scale, and sensor resolution is up to 0.1um, the data of collection by digital simulation compensation software at Reason, obtains more accurate as a result, the present invention is than measuring apparatus precision higher currently on the market, more efficient, of the invention ball The measurement accuracy of bearing channel radius of curvature measurement system is 0.5um, and measurement reproducibility precision is ± 2.0um, can meet to produce The technical requirements of enterprise.
Brief description of the drawings
Fig. 1 is ball bearing channel radius of curvature schematic diagram of the present invention.
Fig. 2 is measuring principle figure of the present invention.
Fig. 3 is measuring device structure principle chart of the present invention.
Fig. 4 is arc radius fitting schematic diagram of the present invention.
Fig. 5 is structure diagram of the measuring device of the present invention without workpiece for measurement.
Fig. 6 is the structure diagram after measuring device installation workpiece for measurement of the present invention and clamping.
Fig. 7 is the structure diagram of measuring device front view of the present invention.
Fig. 8 is the overall plan figure of measuring method of the present invention.
Fig. 9 is control software functional block diagram of the present invention.
Embodiment
In order to deepen the understanding of the present invention, the present invention is done below in conjunction with drawings and examples and is further retouched in detail State, which is only used for explaining the present invention, and protection scope of the present invention is not formed and is limited.
As shown in figs 1-9, the present invention is a kind of slave mode bearing groove measurer for curvity radius, and measuring device includes measurement Platform 1, fixture mounting platform 2 is provided with above the measuring table 1, and number is additionally provided with the fixture mounting platform 2 The fixture of bearing ring 3 to be measured described in a clamping, it is tight that the fixture includes three claws 4, fixture pinion gear 6 and control fixture The clamp motor 11 of pine bearing ring 3 to be measured, bearing ring 3 to be measured is placed in the top of the fixture mounting platform 2, through institute State fixture mounting platform 2 and the bearing ring to be measured 3 is provided with motor 9 and drives the ball screw 10 rotated, the electricity Machine 9 drives fixture mounting platform 2 to move up and down, and also sets up gear wheel on the ball screw 10, is set on the gear wheel Three three claws 4 in 120 degree of friendships are put, Z-direction displacement sensor 8 is against 2 bottom surface of fixture mounting platform, and X is passed to displacement The gauge head 5 of sensor 7 is against on the raceway groove of bearing ring 3 to be measured.
The measuring method of the slave mode bearing Contact stress of the present invention, the measuring method include the following steps:
A, bearing ring 3 to be measured is installed on the fixture mounting platform 2, clamp is unclamping the clamping motor 11 of workpiece just Turn, drive pinion gear 6 rotates, the drive bull gear drive of pinion gear 6, and three will treat in three claws 4 at 120 degree of angles on gear wheel Survey 3 automatic centering of bearing ring to clamp, X is just against the raceway groove of bearing ring 3 to be measured to the gauge head 5 of displacement sensor 7 at this time On, Z-direction displacement sensor 8 is against on the bottom surface of fixture mounting platform 2;
B, measurement starts, and the motor 9, which rotates, drives ball screw 10 to rotate, and drives the fixture on the ball screw 10 Mounting platform 2 moves up and down, and fluctuation range is limited in raceway groove measurement request, and at this time, X is to displacement sensor 7 and Z-direction position Displacement sensor 8 just collects measurement data in real time, and calculating output finally by control software obtains bearing groove radius of curvature R.
X-direction displacement sensor and Z-direction displacement sensor are installed on fixture mounting platform, the two displacement sensors Remain stationary, when bearing ring lasso to be measured measurement is placed in measured material, and when measurement moves up and down, and X-direction displacement passes The gauge head of sensor it is passive be against bearing ring channel surface to be measured, it is measurable to obtain the displacement of raceway groove X-direction, Z-direction position The gauge head of displacement sensor is against below measured material mounting base, measurable to obtain the displacement of raceway groove Z-direction, this passive Measurement obtains measured value, can be described as passive measurement, therefore the measuring device is referred to as the survey of slave mode bearing Contact stress Measure instrument.
During measurement, sampled data X of the both direction on bearing ring surface to be measured is recorded respectivelyiAnd Zi, wherein i=1, 2 ..., n,(n>3), represent sampled point ordinal number, note bearing channel radius of curvature measurement value is R, then has R=f (Xi , Zi)。
In the present invention, two displacement sensors are directly to connect to read the displacement of measurement head in the x and z directions, sensing Device grating scale reading is exactly to survey point coordinates on bearing ring surface profile to be measured(Xi , Zi), so can obtain a series of Measure XiAnd Zi, then recycle Least Square Circle fitting process to calculate milling radius to be measured, specific computational methods are: A preferable center of circle (a, b) and preferable radius R are found in tested actual profile, make to be tested in actual profile each point to using the point as The radial distance R for the circle that the center of circle is madeiAnd the quadratic sum of the difference of preferable radius R is minimum, as shown in figure 4, then ideal radius R is For required ball bearing channel radius of curvature, the calculation formula of derivation is:
(1)
(2)
(3)
In formula,,,, ,,,,,
R is required ball bearing channel radius of curvature value.
Measuring device of the present invention completes data processing by observing and controlling part.
As shown in figure 8, mechanical part is the measurement executive agent of the present invention, it is only necessary to one direction movement of Z-direction, so only A motor Z-direction motor is wanted, the measurement head of X-direction displacement sensor is passive to be against on raceway groove, and measurement obtains raceway groove in X-direction On displacement, the measurement head of Z-direction displacement sensor is against on the bottom surface of fixture mounting platform, and measurement obtains raceway groove in Z side Upward displacement, the work of such data acquisition.
Observing and controlling part includes control section and survey calculation part, and control section will control the operating of whole measuring system Journey, includes the motion control etc. of mechanical part, is completed jointly with industrial personal computer by PLC, system is automatically performed whole measurement process; The electric signal that two displacement sensors obtain mainly is converted into corresponding coordinate value and is located accordingly by survey calculation part Reason, and minimum two-multiply law given above is combined, measuring point coordinate value is handled, can obtain the raceway groove of bearing ring to be measured Radius of curvature numerical value and its surface outline curves.
As shown in figure 9, measuring system observing and controlling part includes hardware components, software control part two parts.Hardware controls portion Point, during measurement, PLC controls the rotating of stepper motor 9 by stepper motor driver, can measure the displacement of X-direction and Z-direction Amount, displacement information is sent to data collecting card by two displacement sensors by signal regulating device, and then is transferred to industrial personal computer Handled.
The control software functional block diagram of the present invention is as shown in figure 9, the present invention may be used also in addition to it can measure radius of curvature in real time Carry out mathematical analysis and the results show and preservation etc..

Claims (2)

  1. A kind of 1. slave mode bearing groove measurer for curvity radius, it is characterised in that:Measuring device includes measuring table(1), The measuring table(1)Top is provided with fixture mounting platform(2), in the fixture mounting platform(2)On be additionally provided with it is several Bearing ring to be measured described in clamping(3)Fixture, the fixture includes three claws(4), fixture pinion gear(6)And control folder Has tense-lax bearing ring to be measured(3)Clamp motor(11), bearing ring to be measured(3)It is placed in the fixture mounting platform(2) Top, through the fixture mounting platform(2)With the bearing ring to be measured(3)It is provided with motor(9)Drive and rotate Ball screw(10), the motor(9)Drive fixture mounting platform(2)Move up and down, in the ball screw(10)It is upper to go back Gear wheel is set, three three claws in 120 degree of friendships are set on the gear wheel(4), Z-direction displacement sensor(8)It is against The fixture mounting platform(2)Bottom surface, X is to displacement sensor(7)Gauge head(5)It is against bearing ring to be measured(3)Raceway groove on.
  2. A kind of 2. measuring method of slave mode bearing Contact stress according to claim 1, it is characterised in that:The measurement Method includes the following steps:
    A, by bearing ring to be measured(3)Installed in the fixture mounting platform(2), the clamping motor of clamp release workpiece (11)Rotate forward, drive pinion gear(6)Rotate, pinion gear(6)Drive bull gear drive, on gear wheel three in the three of 120 degree of angles A claw(4)By bearing ring to be measured(3)Automatic centering clamps, and X is to displacement sensor at this time(7)Gauge head(5)Just it is against Bearing ring to be measured(3)Raceway groove on, Z-direction displacement sensor(8)It is against fixture mounting platform(2)Bottom surface on;
    B, measurement starts, the motor(9)Rotate and drive ball screw(10)Rotate, drive is mounted in the ball screw(10)On Fixture mounting platform(2)Move up and down, fluctuation range is limited in raceway groove measurement request, and at this time, X is to displacement sensor (7)With Z-direction displacement sensor(8)Measurement data is just collected in real time, and calculating output finally by control software obtains bearing Contact stress R.
CN201711220813.1A 2017-11-29 2017-11-29 Device and method for measuring curvature radius of driven bearing groove Active CN107907071B (en)

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CN201711220813.1A CN107907071B (en) 2017-11-29 2017-11-29 Device and method for measuring curvature radius of driven bearing groove

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112129258A (en) * 2020-08-24 2020-12-25 中车唐山机车车辆有限公司 Scratch depth measuring device and method
CN112747707A (en) * 2020-12-29 2021-05-04 中国航发哈尔滨轴承有限公司 Rapid evaluating method for deep groove ball bearing raceway

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DE3637760A1 (en) * 1986-11-04 1988-05-11 Rissmann Horst G Arrangement for checking and measuring threads and their rotationally symmetric, coaxial profile as well as their flatness relative to all other diameters, surfaces, tapers, threads and bores on one and the same turned part in one clamping operation
CN2755598Y (en) * 2004-10-12 2006-02-01 李有坤 Self-centring fast clamp with three point
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DE3637760A1 (en) * 1986-11-04 1988-05-11 Rissmann Horst G Arrangement for checking and measuring threads and their rotationally symmetric, coaxial profile as well as their flatness relative to all other diameters, surfaces, tapers, threads and bores on one and the same turned part in one clamping operation
CN2755598Y (en) * 2004-10-12 2006-02-01 李有坤 Self-centring fast clamp with three point
CN202452955U (en) * 2012-01-13 2012-09-26 河南科技大学 Linear-array-camera-based automatic acquisition system for panorama of cylinder outer surface
CN102901433A (en) * 2012-10-31 2013-01-30 宁波培源电器制造有限公司 Coaxiality detector
CN203804254U (en) * 2014-04-21 2014-09-03 安徽瑞林汽配有限公司 Motor cover plate locating tool
CN105806631A (en) * 2016-02-01 2016-07-27 北京科基中意软件开发有限公司 3D four-wheel position indicator shooting measurement target clamp
CN206663060U (en) * 2017-03-06 2017-11-24 陕西飞机工业(集团)有限公司 One kind clamps force adaptive scroll chuck location locking mechanism

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112129258A (en) * 2020-08-24 2020-12-25 中车唐山机车车辆有限公司 Scratch depth measuring device and method
CN112129258B (en) * 2020-08-24 2022-07-26 中车唐山机车车辆有限公司 Scratch depth measuring method
CN112747707A (en) * 2020-12-29 2021-05-04 中国航发哈尔滨轴承有限公司 Rapid evaluating method for deep groove ball bearing raceway

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