CN102501137A - Online monitoring device for radial rotation accuracy of main shaft - Google Patents
Online monitoring device for radial rotation accuracy of main shaft Download PDFInfo
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- CN102501137A CN102501137A CN2011103432963A CN201110343296A CN102501137A CN 102501137 A CN102501137 A CN 102501137A CN 2011103432963 A CN2011103432963 A CN 2011103432963A CN 201110343296 A CN201110343296 A CN 201110343296A CN 102501137 A CN102501137 A CN 102501137A
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Abstract
An online monitoring device for the radial rotation accuracy of a main shaft is disclosed, wherein a monitoring ring is installed at the radial measuring position of the main shaft; three eddy-current displacement sensors are installed on the monitoring ring; the proximitors of the eddy-current displacement sensors are connected with the terminal board of a data acquisition board card; the data acquisition board card is connected to an industrial computer via a PCI (peripheral component interconnection) slot; when the main shaft is in a rotating state, the eddy-current displacement sensors convert the measured voltage signal to a standard voltage signal via the proximitors; the analog signal is converted to a digital signal via a signal conditioning circuit module and an A/D (analog/digital) conversion module on the data acquisition board card, and then the digital signal enters into the industrial computer; the radial displacement signal of the main shaft is obtained by signal acquisition and analysis software; the roundness error of the main shaft is separated out by applying a three-point error separation technology, thereby obtaining the rotation error of the main shaft; and finally the analysis result of the rotation accuracy of the main shaft is displayed. The online monitoring device for the radial rotation accuracy of a main shaft has the advantages of being high in accuracy and convenient in adjustment.
Description
Technical field
The invention belongs to high-speed main spindle rotating accuracy on-line monitoring technique field, particularly a kind of main shaft diameter is to the rotating accuracy on-Line Monitor Device.
Background technology
Spindle rotation error is an important indicator weighing machining center and machine tool accuracy.Correlative study is the result show: the deviation from circular from of precision turning processing has 30%-70% to be caused by turn error, and the high more proportion of machine finish is big more.Turn error also directly reflects lathe dynamic property quality, through test and analysis to turn error, and can following the minimum shape error and best surface quality that can reach of predicted ideal processing conditions; Can also be used for the control of machine tooling error compensation, judge that mismachining tolerance produces reason etc.Along with improving constantly of machining accuracy; The space of improving machining accuracy is more and more limited, adopt the meaning of Error Compensation Technology more and more important, and the key of error compensation is to obtain accurate spindle rotation error; Therefore, the spindle rotation error test seems extremely important.
Traditional turn error measuring method as calibrate with amesdial to beat, can not the turn error and the deviation from circular from of main shaft be separated, tend to like this deviation from circular from of main shaft is blended in the turn error of main shaft.Other turn error measuring method belongs to the off-line measurement mode more; And in these methods; Often adopt non-contact displacement transducer to measure the vibration of main shaft, but because the precision of sensor is high and main shaft between initial mounting distance very little, traditional sensor installation method is directly to be connected with screwed hole on the spindle nose support through sensor head; This installation adjusting method makes sensor on the one hand in the process of precession screwed hole; Sensor wire must be followed together and rotated, otherwise possibly cause the sensor wire kinking, installs and inconvenience; Because thread pitch is bigger, the distance on sensor distance main shaft surface is difficult to control and accurately adjustment on the other hand, and it is inconvenient in practical operation that therefore this sensor is installed the adjustment mode.Therefore be necessary to study a kind of can realize main shaft diameter to the on-line monitoring of turn error and realize the sensor distance accurate and adjustable and main shaft diameter easy to use to the turn error monitoring device.
Summary of the invention
In order to solve the defective of above-mentioned prior art; The object of the present invention is to provide a kind of main shaft diameter to the rotating accuracy on-Line Monitor Device; Through monitoring and analysis to spindle rotation accuracy; Can isolate the turn error of high-speed main spindle under different operating modes and different rotating speeds, for the real-time adjustment of main shaft monitoring running state and duty parameter provides foundation.
For realizing above-mentioned purpose, the present invention takes following technical scheme to realize:
A kind of main shaft diameter is to the rotating accuracy on-Line Monitor Device; Comprise and be installed in the locational monitoring ring of main shaft 11 radial measurements; On the monitoring ring 3 high accuracy eddy current displacement sensors 1 are housed; The fore-lying device 12 of eddy current displacement sensor 1 is connected with the terminal board 13 of data collecting plate card 14, and data collecting plate card 14 is connected on the industrial computer 15 through the PCI slot.
Said monitoring ring is made up of support ring 3, fixed block 8, adapter sleeve 7, adjustment piece 2, lock-screw 5, rotation stopping screw 6 and stop screw 4 seven parts; Eddy current displacement sensor 1 is installed on the fixed block 8; Fixed block 8 and adjustment piece 2 and adapter sleeve 7 are through being threaded; Stop screw 4 and support ring 3 are through being threaded and the head of stop screw 4 being embedded in the annular groove 20 of adjustment piece 2; Rotation stopping screw 6 and support ring 3 are through being threaded and the head of rotation stopping screw 6 being embedded in the gathering sill 24 of adapter sleeve 7, and lock-screw 5 is screwed through the screw thread on the support ring and withstood adapter sleeve 7.
Described 3 eddy current displacement sensors 1 location has axially; Radially with three requirements of angle, axial aspect is in same installation site; The installing hole of three directions of monitoring ring should be in same plane, and then guarantees the center line coplane of 3 eddy current displacement sensors 1; Aspect radially, the installation axis of 3 eddy current displacement sensors 1 must be in same circular sections, and crossing with the intersection point in this cross section with main-shaft axis; The angle aspect; Angle between the axis of 3 eddy current displacement sensors 1 must accurately and confirm that wherein two angles are that
and
is to satisfy the requirement of precise sensors setting angle.
Fixed block 8 comprises connecting thread 25 in the fixed block, the outer connecting thread 26 of fixed block; Connecting thread 25 is used to connect the probe of fixation of sensor 1 in the fixed block, and the outer connecting thread 26 of fixed block is used for being connected with adapter sleeve.
In the present invention; High-speed main spindle is under the rotation work state; Eddy current displacement sensor 1 is with the analog voltage signal that records, and conditioning circuit module on analog input card 14 and A/D modular converter are data signal (being the radial displacement of main shaft) with analog signal conversion, after this signal enters into industrial computer 15; Carry out analyzing and processing by signal processing and analysis software, carry out the analysis of spindle rotation accuracy and show the result.
The present invention has the following advantages compared with prior art:
(1) adopt main shaft diameter can realize the spindle rotation accuracy real time on-line monitoring to the rotating accuracy on-Line Monitor Device.
(2) proposed the adjustable erecting device of a kind of sensing station, made that the installation adjustment of sensing station is simpler and easy flexibly.
(3) adopt the line-of-sight course error separating technology, on three directions, monitor the radial displacement of main shaft simultaneously, can isolate the deviation from circular from of main shaft, and then obtain the turn error of main shaft, make rotating accuracy more accurate in main shaft diameter.
Description of drawings
Fig. 1 is that eddy current displacement sensor 1 is connected sketch map with the inside of support ring 3 among the present invention.
Fig. 2 is an external overall structure chart of the present invention.
Fig. 3 is the plane structure chart of support ring 3.
Fig. 4 is the structure chart of adjustment piece 2.
Fig. 5 is the structure chart of adapter sleeve 7.
Fig. 6 is the structure chart of fixed block 8, and wherein scheming a is vertical view, figure b be A-A to cutaway view.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done detailed explanation.
With reference to Fig. 2; A kind of main shaft diameter is to the rotating accuracy on-Line Monitor Device; Comprise and be equipped in the locational monitoring ring of main shaft 11 radial measurements; On the monitoring ring 3 eddy current displacement sensors 1 are housed, the fore-lying device 12 of eddy current displacement sensor 1 is connected with the terminal board 13 of data collecting plate card 14, and data collecting plate card 14 is connected on the industrial computer 15 through the PCI slot.
With reference to Fig. 1; Said monitoring ring is made up of support ring 3, fixed block 8, adapter sleeve 7, adjustment piece 2, lock-screw 5, rotation stopping screw 6 and stop screw 4 seven parts; Eddy current displacement sensor 1 is installed on the fixed block 8; Fixed block 8 and adjustment piece 2 and adapter sleeve 7 are through being threaded; Stop screw 4 and support ring 3 be through being threaded and the head of stop screw 4 is embedded in the cannelure of adjustment piece, and rotation stopping screw 6 and support ring 3 are through being threaded and the head of rotation stopping screw 6 being embedded in the gathering sill 24 of adapter sleeve 7, and lock-screw 5 is screwed through the screw thread on the support ring and withstood adapter sleeve 7.
With reference to Fig. 2, described 3 eddy current displacement sensors 1 location has axially, radially with three requirements of angle; Axial aspect; In same installation site, the installing hole of three directions of monitoring ring should be in same plane, and then guarantees the center line coplane of 3 eddy current displacement sensors 1; Aspect radially, the installation axis of 3 eddy current displacement sensors 1 must be in same circular sections, and crossing with the intersection point in this cross section with main-shaft axis; The angle aspect; With reference to Fig. 3; Angle between the axis of 3 eddy current displacement sensors 1 must accurately and confirm that wherein two angles are that
and
is to satisfy the requirement of precise sensors setting angle.
With reference to Fig. 1, Fig. 3, Fig. 4, Fig. 5 and Fig. 6; More than the concrete installation method of each parts following: at first will adjust piece 2 and adapter sleeve 7 through being threaded together; Let the probe of eddy current displacement sensor 1 from the centre bore 17 of adjustment piece 2 and adapter sleeve 7, pass then; Probe with eddy current displacement sensor 1 is connected fixing with fixed block 8 through connecting thread in the fixed block 25 afterwards; Fixed block 8 is installed in through being threaded on the adapter sleeve 7, these several parts have just been formed an overall structure so again; Respectively the such overall structure of three covers is put into the hole of opening by certain angle on the support ring 3; , in the annular groove 20 of adjustment piece 2, prevent to adjust piece 2 and move up and down with stop screw 5 retainings; In the gathering sill 24 of adapter sleeve 7, prevent that adapter sleeve 7 from rotating with rotation stopping screw 6 retainings; Gearing through screw thread when rotating adjustment piece 2 can make adapter sleeve 7 and superincumbent fixed block 8 is installed and eddy current displacement sensor 1 moves up and down; Adjust after the distance of eddy current displacement sensor 1 and main shaft 11 peripheries, withstand adapter sleeve 7 and make sensor 1 fixed-site thereby tighten with lock-screw 5.
With reference to Fig. 3, support ring 3 of the present invention is provided with connection screw thread hole 16, spacing screwed hole 17, locking screw pit 18, spline screwed hole 19.Connection screw thread hole 16 is used for support ring 3 is fixed on main spindle box end cap 10, and spacing screwed hole 17 is used to install stop screw 4, and locking screw pit 18 is used to install lock-screw 5, and spline screwed hole 19 is used to install rotation stopping screw 6.
With reference to Fig. 4, adjustment piece 2 of the present invention is provided with annular groove 20, the outer connecting thread 21 of adjustment piece and adjustment piece inner chamber 22.Stop screw 4 can be embedded into and be used to prevent to adjust piece in the annular groove 20 and move along axis direction, and the outer connecting thread 21 of adjustment piece is used for being connected with adapter sleeve 7, adjusts piece inner chamber 22 usefulness and the lead of drawing sensor 1.
With reference to Fig. 5, adapter sleeve 7 of the present invention is provided with adapter sleeve inner chamber 23, gathering sill 24.The two ends of adapter sleeve inner chamber 23 are used for connecting adjustment piece 2 and fixed block 8, and the lead of sensor 1 will draw from inner chamber, and rotation stopping screw 6 is embedded into can prevent in the gathering sill 24 that adapter sleeve is along circumferentially rotating.
With reference to Fig. 6, fixed block 8 of the present invention comprises connecting thread 25 in the fixed block, the outer connecting thread 26 of fixed block.Connecting thread 25 is used to connect the probe of fixation of sensor 1 in the fixed block, and the outer connecting thread 26 of fixed block is used for being connected with adapter sleeve.
Operation principle of the present invention is:
Main shaft 11 radially monitoring location sensor monitoring ring is housed; Eddy current displacement sensor 1 probe (being used to measure main shaft diameter to displacement signal) is housed on it; The fore-lying device 12 of sensor is connected with the terminal board 13 of data collecting plate card 14, then data collecting plate card 14 is connected on the industrial computer 15 through the PCI slot; Main shaft 11 is under the rotation work state; Eddy current displacement sensor 1 converts the voltage signal that records into the normal voltage signal through fore-lying device 12; Be data signal through signal conditioning circuit module and A/D modular converter on the data collecting plate card 14 with analog signal conversion then; After this signal enters into industrial computer 15; Obtain the radial displacement signal of main shaft 11 by signal processing and analysis software, the deviation from circular from that uses the line-of-sight course error separating technology to isolate main shaft 11 afterwards obtains the turn error of main shaft, shows the analysis result of spindle rotation accuracy at last.
The above is merely one embodiment of the present invention; It or not whole or unique embodiment; The conversion of any equivalence that those of ordinary skills take technical scheme of the present invention through reading specification of the present invention is claim of the present invention and contains.
Among the figure, 1, eddy current displacement sensor; 2, adjustment piece; 3, support ring; 4, stop screw; 5, lock-screw; 6, rotation stopping screw; 7, adapter sleeve; 8, fixed block; 9, main spindle box; 10, main spindle box end cap; 11, main shaft; 12, fore-lying device; 13 terminal boards; 14 data collecting plate cards; 15, industrial computer; 16, connection screw thread hole; 17, spacing screwed hole; 18, locking screw pit; 19, spline screwed hole; 20, annular groove; 21, the outer connecting thread of adjustment piece; 22, adjustment piece inner chamber; 23, adapter sleeve inner chamber; 24, gathering sill; 25, connecting thread in the fixed block; 26, the outer connecting thread of fixed block.
Claims (7)
1. a main shaft diameter is to the rotating accuracy on-Line Monitor Device; It is characterized in that; To the measuring position monitoring ring is housed in main shaft diameter; On the monitoring ring 3 eddy current displacement sensors (1) are housed, the fore-lying device (12) of eddy current displacement sensor (1) is connected with the terminal board (13) of data collecting plate card (14), and data collecting plate card (14) is connected to (15) on the industrial computer through the PCI slot.
2. a kind of main shaft diameter according to claim 1 is to the rotating accuracy on-Line Monitor Device; It is characterized in that; Said monitoring ring is made up of support ring (3), fixed block (8), adapter sleeve (7), adjustment piece (2), lock-screw (5), rotation stopping screw (6) and stop screw (4) seven parts; Fixed block (8) is gone up sensor installation (1); Fixed block 8 and adjustment piece (2) and adapter sleeve (7) are through being threaded; Stop screw (4) and support ring (3) be through being threaded and the head of stop screw (4) is embedded in the cannelure of adjustment piece (2), and rotation stopping screw (6) and support ring (3) are through being threaded and the head of rotation stopping screw (6) being embedded in the gathering sill of adapter sleeve (7), and lock-screw (5) is screwed through the screw thread on the support ring and withstood adapter sleeve (7).
3. a kind of main shaft diameter according to claim 1 is to the rotating accuracy on-Line Monitor Device; It is characterized in that described 3 eddy current displacement sensors (1) location has axially, radially with three requirements of angle; Axial aspect; In same installation site, the installing hole of three directions of monitoring ring should be in same plane, and then guarantees the center line coplane of 3 eddy current displacement sensors (1); Aspect radially, the installation axis of 3 eddy current displacement sensors (1) must be in same circular sections, and crossing with the intersection point in this cross section with main-shaft axis; The angle aspect; Angle between the axis of 3 eddy current displacement sensors (1) must accurately and confirm that wherein two angles are
and
4. a kind of main shaft diameter according to claim 2 is characterized in that to the rotating accuracy on-Line Monitor Device said support ring (3) is provided with connection screw thread hole (16), spacing screwed hole (17), locking screw pit (18), spline screwed hole (19); Connection screw thread hole (16) is used for support ring (3) is fixed on main spindle box end cap (10), and spacing screwed hole (17) is used to install stop screw (4), and locking screw pit (18) is used to install lock-screw (5), and spline screwed hole (19) is used to install rotation stopping screw (6).
5. a kind of main shaft diameter according to claim 2 is characterized in that to the rotating accuracy on-Line Monitor Device said adjustment piece (2) is provided with annular groove (20), the outer connecting thread (21) of adjustment piece and adjustment piece inner chamber (22); Stop screw (4) is embedded into and is used to prevent to adjust piece in the annular groove (20) and moves along axis direction, and the outer connecting thread (21) of adjustment piece is used for being connected with adapter sleeve (7), adjusts piece inner chamber (22) and uses and the lead of drawing sensor (1).
6. a kind of main shaft diameter according to claim 2 is characterized in that to the rotating accuracy on-Line Monitor Device said adapter sleeve (7) is provided with adapter sleeve inner chamber (23), gathering sill (24); The two ends of adapter sleeve inner chamber (23) are used for connecting adjustment piece (2) and fixed block (8), and the lead of sensor (1) will draw from inner chamber, and rotation stopping screw (6) is embedded into and prevents in the gathering sill (24) that adapter sleeve is along circumferentially rotation.
7. a kind of main shaft diameter according to claim 2 is characterized in that to the rotating accuracy on-Line Monitor Device said fixed block (8) comprises connecting thread (25) in the fixed block, the outer connecting thread (26) of fixed block; Connecting thread (25) is used to connect the probe of fixation of sensor (1) in the fixed block, and the outer connecting thread (26) of fixed block is used for being connected with adapter sleeve.
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| CN201110343296.3A CN102501137B (en) | 2011-11-03 | 2011-11-03 | Online monitoring device for radial rotation accuracy of main shaft |
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| CN201110343296.3A CN102501137B (en) | 2011-11-03 | 2011-11-03 | Online monitoring device for radial rotation accuracy of main shaft |
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| CN111721526A (en) * | 2019-03-04 | 2020-09-29 | 宁波天控五轴数控技术有限公司 | High-speed electric main shaft performance testing device |
| CN110440128A (en) * | 2019-07-30 | 2019-11-12 | 核工业第八研究所 | A kind of internal diameter shrinkage dynamic monitoring method and device winding metal liner |
| CN110440128B (en) * | 2019-07-30 | 2021-04-27 | 核工业第八研究所 | Dynamic monitoring method and device for inner diameter shrinkage of wound metal liner |
| CN111002102A (en) * | 2019-12-02 | 2020-04-14 | 珠海格力电器股份有限公司 | Method and device for detecting rotation error of spindle, storage medium and processor |
| CN112846938A (en) * | 2021-01-05 | 2021-05-28 | 北京信息科技大学 | Main shaft rotation precision degradation traceability system under cutting working condition |
| CN112846938B (en) * | 2021-01-05 | 2022-09-16 | 北京信息科技大学 | Main shaft rotation precision degradation traceability system under cutting working condition |
| CN114035505A (en) * | 2021-11-05 | 2022-02-11 | 珠海格力电器股份有限公司 | Control system and control method for machine tool machining |
| CN114152237A (en) * | 2021-11-26 | 2022-03-08 | 珠海格力电器股份有限公司 | Monitoring device based on radial error of main shaft |
| CN114152233A (en) * | 2021-12-09 | 2022-03-08 | 坎德拉(深圳)新能源科技有限公司 | Radial displacement sensor positioning support for flywheel energy storage device |
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