CN108931167A - The measurement method of main shaft bearing spacer ring precision - Google Patents
The measurement method of main shaft bearing spacer ring precision Download PDFInfo
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- CN108931167A CN108931167A CN201710369443.1A CN201710369443A CN108931167A CN 108931167 A CN108931167 A CN 108931167A CN 201710369443 A CN201710369443 A CN 201710369443A CN 108931167 A CN108931167 A CN 108931167A
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- main shaft
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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
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
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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
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
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- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The present invention provides a kind of measurement methods of main shaft bearing spacer ring precision：Experiment main shaft upper-part mainly includes the angular contact ball bearing of a pair of installation of form back-to-back, one locking nut and a spacer ring, by changing the magnitude of interference size between main shaft and bearing using the micrometre grade thin gasket of different-thickness between main shaft and the mating surface of bearing inner race, apply axial load in spindle nose, radial load analog main shaft machining operating condition, test the Static stiffness of axis system under different magnitude of interference, rotating accuracy, temperature rise and vibration, and axis system characteristics of mode is tested by hammering method, the present invention simplifies axis system structure, exclude the influence of other assembly parameter shaft performances, it can more comprehensively, the rule that convenient test bearing magnitude of interference influences axis system performance.
Description
Technical field
The present invention relates to bearing processing technical field, in particular to a kind of measurement side of main shaft bearing spacer ring precision
Method.
Background technique
In high-speed main spindle-bearing arrangement, bearing inner race is attached with main shaft using interference fit, on the one hand its structure
Simply, on the other hand centering precision can be made higher.However, adding locating for the selection of value of interference fit size and axis system
The work operating condition such as speed of mainshaft, cutting force, cutting speed etc. is related, with the change of machine tool chief axis processing operating condition, in centrifugal effect
Under the combined influence of the factors such as fuel factor, main shaft and bearing inner race can deform, and connection status both is caused to change
Become, further influences the processing performance of shafting.Magnitude of interference chooses the excessive assembly difficulty for often making main shaft and bearing, even
Lead to the damage of the two mating surface；And magnitude of interference choose it is too small will cause loosening for main shaft and bearing, cause mating surface to be skidded,
Shafting vibration, temperature rise is led to problems such as to increase.Therefore, it is necessary to the quantitative selections to main shaft bearing spacer ring magnitude of interference to study.
It is more short of in terms of spindle rotor and the experimental provision and testing research of bearing inner race magnitude of interference at present, lacks needle
To the experimental provision of magnitude of interference shaft performance impact analysis, it is difficult to which the affecting laws for changing shaft performance to magnitude of interference carry out
System research
Summary of the invention
The purpose of the present invention aims to solve at least one of the technological deficiency.
To achieve the goals above, the embodiment of one aspect of the present invention provides a kind of measurement side of main shaft bearing spacer ring precision
Method specifically includes following steps：
Step 1, the mating surface by testing main shaft and a pair of angular contact ball bearing inner ring installed back-to-back in magnitude of interference
Between change magnitude of interference experiment main shaft using the micrometre grade thin gasket of different-thickness and the pair of install back-to-back
Magnitude of interference size between angular contact ball bearing,
Step 2 applies axial load or radial load in magnitude of interference experiment spindle nose using electro spindle or hydraulic cylinder
Lotus with analog main shaft machining operating condition,
Then step 3 tests the Static stiffness of axis system, rotating accuracy, bearing temperature rise and vibration under different magnitude of interference, together
When, the characteristics of mode of axis system under corresponding magnitude of interference is tested by hammering method using power hammer
Preferably, further comprising the steps of when changing the magnitude of interference size：Step S1, the described end cap is opened, and institute is dismantled
Locking nut is stated, the pair of angular contact ball bearing installed back-to-back is tested using bearing puller along magnitude of interference then and is led
Axis ejects bearing block；Step S2 replaces the micrometre grade thin gasket of different-thickness, and the micrometre grade thin gasket after replacement is adsorbed on interference
On amount experiment main shaft；Bearing block is returned in the pair of angular contact ball bearing top installed back-to-back by step S3 combination hot charge practice, so
After reinstall the locking nut and end cap；
Preferably, when changing the magnitude of interference size, can also include the following steps：End cap described in step S1 is opened, then
The locking nut is dismantled, then directly dismantles bearing block, then by magnitude of interference experiment main shaft and the pair of back-to-back peace
The angular contact ball bearing of dress takes out together, and the pair of angular contact ball bearing magnitude of interference installed back-to-back is then tested main shaft
Separation, then replaces the micrometre grade thin gasket of different-thickness, and the micrometre grade thin gasket after replacement is adsorbed on magnitude of interference experiment main shaft
On, then the pair of angular contact ball bearing installed back-to-back is reinstalled to magnitude of interference experiment main shaft using hot charge practice, so
After be reinstalled bearing block and the locking nut and end cap be installed.
Preferably, in the Static stiffness test, the radial displacement of magnitude of interference experiment main shaft is obtained by amesdial measurement, with thousand
The loading force for dividing table measurement direction opposite is provided by the hydraulic cylinder；In the rotating accuracy test, is driven and led using electro spindle
Axle system operating measures the radial direction of magnitude of interference experiment main shaft using three capacitance displacement sensors in axis system operation process
Displacement, and measurement data is analyzed and processed using line-of-sight course, obtain the rotating accuracy of axis system；The bearing temperature rise is surveyed
In examination, by two through-holes being opened up on bearing block by temperature sensor and the pair of angular contact ball bearing installed back-to-back
Outer ring contact, thus the temperature rise of real-time measurement bearing outer ring；In the vibration-testing, transported using electro spindle driving spindle system
Turn, the vibration signal of axis system operation process is obtained by the three-dimensional acceleration transducer being mounted on bearing block top, is passed through
Vibration signal is handled, the vibration amplitude and vibration frequency of axis system are obtained；In the characteristics of mode test, use
The power hammer carries out radial percussion to magnitude of interference experiment main shaft in the opposite side of three-dimensional acceleration transducer, and is adopted by LMS data
Collecting system obtains power hammer excitation signal and acceleration transducer response signal, is analyzed by data, obtains the frequency of axis system
Receptance function；By changing the position of three-dimensional acceleration transducer, the frequency response function of axis system difference is obtained, then
The intrinsic frequency and Mode Shape of axis system are obtained using lumped-parameter method.
Experiment main shaft upper-part according to an embodiment of the present invention mainly includes the angular contact ball of a pair of installation of form back-to-back
Bearing, a locking nut and a spacer ring, can conveniently adjust the magnitude of interference of bearing inner race and main shaft, be magnitude of interference
Quantitative calculating or optimization design provide experiment test device, facilitate the Rational choice of bearing Yu main shaft work-in parameters, keep away
Exempt from traditional utilization experience to determine that the problems of bearing magnitude of interference, such as main shaft performance can not reach optimization.This hair
It is bright can to the axis system in the case of different magnitude of interference carry out comprehensively and accurately performance test, including axis system Static stiffness,
Bearing outer ring temperature, shafting rotating accuracy, spindle vibration, intrinsic frequency etc., test result can be magnitude of interference to axis system
Affecting laws research provide reference.
The additional aspect of the present invention and advantage will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, wherein：
Fig. 1 is main shaft bearing magnitude of interference test main axle structure schematic diagram；
Fig. 2 is main shaft bearing magnitude of interference experiment test system schematic diagram；
Fig. 3 is that main shaft and bearing inner race magnitude of interference change schematic diagram；
Fig. 4 is axis system Static stiffness test schematic diagram under different magnitude of interference；Wherein：A is perspective view；Before b is the main shaft of a
End-view；
Fig. 5 is axis system rotating accuracy test schematic diagram under different magnitude of interference；
Fig. 6 is axis system characteristics of mode test schematic diagram under different magnitude of interference；
Fig. 7 is spindle system vibration test schematic diagram under different magnitude of interference；
Fig. 8 is axis system bearing temperature test schematic diagram under different magnitude of interference；Wherein：A is perspective view；B is the section view of a
Figure
Detailed description of the invention
In figure：1- magnitude of interference tests main shaft；2- locking nut；3- end cap；4- screw；5- bearing block；6- angular contact ball axis
It holds；7- spacer ring；8- cast iron platform；9- bracket；10- electro spindle；11- micrometre grade thin gasket；12- amesdial；13- hydraulic cylinder；14-
Capacitance displacement sensor；15- three-dimensional acceleration transducer；16- temperature sensor；17- flange.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
As shown in Figure 1, a kind of measurement method of main shaft bearing spacer ring precision of the offer of the embodiment of the present invention includes following
Step：By the mating surface for testing main shaft 1 and the pair of 6 inner ring of angular contact ball bearing installed back-to-back in the magnitude of interference
Between change magnitude of interference experiment main shaft 1 and the pair of back-to-back installation using the micrometre grade thin gasket 11 of different-thickness
Angular contact ball bearing 6 between magnitude of interference size, it is then real in the magnitude of interference using the electro spindle 10 or hydraulic cylinder 13
It tests 1 end of main shaft and applies axial load or radial load with analog main shaft machining operating condition, then test under different magnitude of interference
Static stiffness, rotating accuracy, bearing temperature rise and the vibration of axis system, meanwhile, it is tested and is corresponded to by hammering method using power hammer
The characteristics of mode of axis system under magnitude of interference, to obtain the rule that bearing magnitude of interference influences axis system performance
In one embodiment of the invention, when changing the magnitude of interference size, first the end cap 3 is opened, then dismantles
The locking nut 2, it is then using bearing puller that the pair of angular contact ball bearing 6 installed back-to-back is real along magnitude of interference
It tests main shaft 1 and ejects bearing block 5, then replace the micrometre grade thin gasket 11 of different-thickness, the micrometre grade thin gasket 11 after replacement is inhaled
It is attached on magnitude of interference experiment main shaft 1, the pair of angular contact ball bearing 6 installed back-to-back is pushed up into back axis then in conjunction with hot charge practice
Seat 5 is held, the locking nut 2 and end cap 3 are then reinstalled；
In another embodiment of the present invention, when changing the magnitude of interference size, first the end cap 3 is opened, then tears open
The locking nut 2 is unloaded, then directly dismantles bearing block 5, then by magnitude of interference experiment main shaft 1 and the pair of back-to-back peace
The angular contact ball bearing 6 of dress takes out together, then tests the pair of angular contact ball bearing 6 installed back-to-back and magnitude of interference
Main shaft 1 separates, and then replaces the micrometre grade thin gasket 11 of different-thickness, and the micrometre grade thin gasket 11 after replacement is adsorbed on magnitude of interference
It tests on main shaft 1, then the pair of angular contact ball bearing 6 installed back-to-back is reinstalled to magnitude of interference using hot charge practice and is tested
On main shaft 1, then it is reinstalled bearing block 5 and the locking nut 2 and end cap 3 is installed
In the Static stiffness test, the radial displacement of magnitude of interference experiment main shaft 1 is obtained by the measurement of amesdial 12, with amesdial
The opposite loading force of 12 measurement directions is provided by the hydraulic cylinder 13；In the rotating accuracy test, driven using electro spindle 10
Axis system operating measures magnitude of interference experiment main shaft 1 using three capacitance displacement sensors 14 in axis system operation process
Radial displacement, and measurement data is analyzed and processed using line-of-sight course, obtains the rotating accuracy of axis system；The bearing
In temperature rise test, by two through-holes being opened up on bearing block by temperature sensor 16 and the pair of corner connection installed back-to-back
The outer ring contact for touching ball bearing 6, thus the temperature rise of real-time measurement bearing outer ring；In the vibration-testing, driven using electro spindle 10
The vibration signal of dynamic axis system operating, axis system operation process is passed by the three-dimensional acceleration being mounted on 5 top of bearing block
Sensor 15 obtains, and by handling vibration signal, obtains the vibration amplitude and vibration frequency of axis system；The mode
In characteristic test, radial strike is carried out to magnitude of interference experiment main shaft 1 in the opposite side of three-dimensional acceleration transducer 15 using power hammer
It hits, and power hammer excitation signal and acceleration transducer response signal is obtained by LMS data collection system, analyzed by data,
Obtain the frequency response function of axis system；By changing the position of three-dimensional acceleration transducer 15, axis system difference is obtained
Then the frequency response function of point obtains the intrinsic frequency and Mode Shape of axis system using lumped-parameter method.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiment or examples in can be combined in any suitable manner.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art are not departing from the principle of the present invention and objective
In the case where can make changes, modifications, alterations, and variations to the above described embodiments within the scope of the invention.The scope of the present invention
By appended claims and its equivalent limit.
Claims (4)
1. a kind of measurement method of main shaft bearing spacer ring precision, specifically includes following steps：
Step 1, by being tested between main shaft and the mating surface of a pair of angular contact ball bearing inner ring installed back-to-back in magnitude of interference
Change the magnitude of interference experiment main shaft and the pair of corner connection installed back-to-back using the micrometre grade thin gasket of different-thickness
The magnitude of interference size between ball bearing is touched,
Step 2, using electro spindle or hydraulic cylinder magnitude of interference experiment spindle nose apply axial load or radial load with
Analog main shaft machining operating condition,
Then step 3 tests the Static stiffness of axis system, rotating accuracy, bearing temperature rise and vibration under different magnitude of interference, meanwhile,
The characteristics of mode of axis system under corresponding magnitude of interference is tested by hammering method using power hammer.
2. the measurement method of main shaft bearing spacer ring precision according to claim 1, it is characterised in that：Change the magnitude of interference
It is further comprising the steps of when size：
Step S1, the described end cap is opened, and the locking nut is dismantled, and then uses bearing puller by the pair of back-to-back peace
The angular contact ball bearing of dress ejects bearing block along magnitude of interference experiment main shaft；
Step S2 replaces the micrometre grade thin gasket of different-thickness, and the micrometre grade thin gasket after replacement is adsorbed on magnitude of interference experiment main shaft
On；
Bearing block is returned in the pair of angular contact ball bearing top installed back-to-back by step S3 combination hot charge practice, then reinstalls
The locking nut and end cap.
3. the measurement method of main shaft bearing spacer ring precision according to claim 1, it is characterised in that：Change the magnitude of interference
When size, it can also include the following steps：End cap described in step S1 is opened, then dismantles the locking nut, then directly by axis
It holds seat to dismantle, then take out magnitude of interference experiment main shaft together with the pair of angular contact ball bearing installed back-to-back, then
By the pair of angular contact ball bearing magnitude of interference experiment main shaft separation installed back-to-back, the micron order of different-thickness is then replaced
Shim liner, the micrometre grade thin gasket after replacement are adsorbed on magnitude of interference experiment main shaft, then use hot charge practice by the pair of back
The angular contact ball bearing of backrest installation is reinstalled to magnitude of interference experiment main shaft, is then reinstalled bearing block and is installed the locking
Nut and end cap.
4. the measurement method of main shaft bearing spacer ring precision according to claim 1, it is characterised in that：The Static stiffness test
In, the radial displacement of magnitude of interference experiment main shaft is obtained by amesdial measurement, and the loading force opposite with amesdial measurement direction is by institute
Hydraulic cylinder offer is provided；In the rotating accuracy test, is operated using electro spindle driving spindle system, passed using three capacitive displacements
Sensor measured in axis system operation process magnitude of interference experiment main shaft radial displacement, and using line-of-sight course to measurement data into
Row analysis processing, obtains the rotating accuracy of axis system；It is logical by two opened up on bearing block in the bearing temperature rise test
Hole contacts temperature sensor with the outer ring of the pair of angular contact ball bearing installed back-to-back, thus outside real-time measurement bearing
The temperature rise of circle；In the vibration-testing, operated using electro spindle driving spindle system, the vibration signal of axis system operation process
It is obtained by the three-dimensional acceleration transducer being mounted on bearing block top, by handling vibration signal, obtains main shaft system
The vibration amplitude and vibration frequency of system；In the characteristics of mode test, hammered into shape using the power in three-dimensional acceleration transducer
Opposite side carries out radial percussion to magnitude of interference experiment main shaft, and obtains power hammer excitation signal and acceleration by LMS data collection system
Sensor response signal is spent, is analyzed by data, obtains the frequency response function of axis system；It is passed by changing three-dimensional acceleration
The position of sensor obtains the frequency response function of axis system difference, then obtains axis system using lumped-parameter method
Intrinsic frequency and Mode Shape.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710369443.1A CN108931167A (en) | 2017-05-23 | 2017-05-23 | The measurement method of main shaft bearing spacer ring precision |
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| CN201710369443.1A CN108931167A (en) | 2017-05-23 | 2017-05-23 | The measurement method of main shaft bearing spacer ring precision |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110132593A (en) * | 2019-05-14 | 2019-08-16 | 重庆大学 | Spacer ring nonparallelism is to main shaft Thermo-structure experiment affecting laws test platform and method |
| CN114453974A (en) * | 2022-03-10 | 2022-05-10 | 兰州理工大学 | Device and method for testing dynamic interference variation of interference connection between motor rotor and main shaft |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105258888A (en) * | 2015-11-13 | 2016-01-20 | 西安交通大学 | Research experiment apparatus and measurement method for influences of bearing interference on main shaft system performance |
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2017
- 2017-05-23 CN CN201710369443.1A patent/CN108931167A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105258888A (en) * | 2015-11-13 | 2016-01-20 | 西安交通大学 | Research experiment apparatus and measurement method for influences of bearing interference on main shaft system performance |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110132593A (en) * | 2019-05-14 | 2019-08-16 | 重庆大学 | Spacer ring nonparallelism is to main shaft Thermo-structure experiment affecting laws test platform and method |
| CN114453974A (en) * | 2022-03-10 | 2022-05-10 | 兰州理工大学 | Device and method for testing dynamic interference variation of interference connection between motor rotor and main shaft |
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Application publication date: 20181204 |