CN102501137B - 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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- CN102501137B CN102501137B CN201110343296.3A CN201110343296A CN102501137B CN 102501137 B CN102501137 B CN 102501137B CN 201110343296 A CN201110343296 A CN 201110343296A CN 102501137 B CN102501137 B CN 102501137B
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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, more particularly to a kind of radial rotation accuracy of main shaft on-Line Monitor Device.
Background technology
Spindle rotation error is an important indicator for weighing machining center and machine tool accuracy.Correlative study result shows：It is that as caused by turn error, and the higher proportion of machine finish is bigger that the deviation from circular from of precision turning processing, which has 30%-70%,.Turn error also directly reflection machine dynamic performance is fine or not, can be with the lower minimum shape error and best surface quality that can be reached of predicted ideal processing conditions by the test and analysis to turn error；It can be used for machine tooling error compensation control, judge mismachining tolerance producing cause etc..With the continuous improvement of machining accuracy, the space for improving machining accuracy is more and more limited, more and more important using the meaning of Error Compensation Technology, and the key of error compensation is to obtain accurate spindle rotation error, therefore, spindle rotation error test seems extremely important.
Traditional turn error measuring method such as calibrated with amesdial to bounce, it is impossible to the turn error of main shaft and roundness error separation are come, so often the deviation from circular from of main shaft is mixed into the turn error of main shaft.Belonging to off-line measurement mode other turn error measuring methods more, and in these methods, the vibration of main shaft is often measured using non-contact displacement transducer, but because the initial mounting distance between the high precision and main shaft of sensor is very small, traditional sensor installation method is to be directly connected to by sensor head with the screwed hole on spindle nose support, on the one hand this installation adjusting method causes sensor during precession screwed hole, sensor wire must be followed and rotated together, otherwise sensor wire kinking may be caused, installed and its inconvenient；On the other hand because thread pitch is larger, the distance on sensor distance main shaft surface is difficult control and accurate adjustment, therefore this sensor mounting and adjusting mode is inconvenient in practical operation.It is therefore desirable to study a kind of on-line monitoring that can realize Errors in Radial Rotation Error of Spindle and realize the accurate adjustable and easy to use Errors in Radial Rotation Error of Spindle monitoring device of sensor distance.
The content of the invention
In order to solve the defect of above-mentioned prior art, it is an object of the invention to provide a kind of radial rotation accuracy of main shaft on-Line Monitor Device, pass through the monitoring and analysis to spindle rotation accuracy, turn error of the high-speed main spindle under different operating modes and different rotating speeds can be isolated, the real-time adjustment for main shaft monitoring running state and duty parameter provides foundation.
To achieve the above object, the present invention, which is adopted the following technical scheme that, gives realization：
A kind of radial rotation accuracy of main shaft on-Line Monitor Device, including the monitoring ring on the radial measurement position of main shaft 11, monitor on ring equipped with 3 high precision electro eddy displacement sensors 1, 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 industrial computer 15 by PCI slot.
The monitoring ring is by support ring 3, fixed block 8, adapter sleeve 7, adjustment block 2, lock-screw 5, rotation stopping screw 6 and the part of stop screw 4 seven composition, eddy current displacement sensor 1 is installed on fixed block 8, fixed block 8 and adjustment block 2 are connected through a screw thread with adapter sleeve 7, stop screw 4 is connected through a screw thread with support ring 3 and the head of stop screw 4 is embedded into the annular groove 20 of adjustment block 2, rotation stopping screw 6 is connected through a screw thread with support ring 3 and the head of rotation stopping screw 6 is embedded in the gathering sill 24 of adapter sleeve 7, lock-screw 5 is screwed by the screw thread in support ring and withstands adapter sleeve 7.
Axial direction is located in 3 described eddy current displacement sensors 1, radially with three requirements of angle, axially aspect, in same installation site, and monitoring the mounting hole in three directions of ring in the same plane, and then should ensure that the center line of 3 eddy current displacement sensors 1 is coplanar；In terms of radially, the mounting axis of 3 eddy current displacement sensors 1 must intersect in same circular section, and with main-shaft axis with the intersection point in the section；In terms of angle, angle between the axis of 3 eddy current displacement sensors 1 must accurately and determination, and two of which angle is
With
To meet precise sensors setting angle requirement.
Connection screw thread hole 16, spacing screwed hole 17, locking screw pit 18, rotation stop screwed hole 19 are provided with support ring 3；Connection screw thread hole 16 is used to support ring 3 being 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 for installation locking screw 5, and rotation stop screwed hole 19 is used to install rotation stopping screw 6.
Fixed block 8 includes the outer connection screw thread 26 of connection screw thread 25, fixed block in fixed block；Probe of the connection screw thread 25 for the eddy current displacement sensor 1 that is connected in fixed block, the outer connection screw thread 26 of fixed block is used for and adapter sleeve connection.
In the present invention, high-speed main spindle is under rotation work state, and eddy current displacement sensor 1 is by the analog voltage signal measured, and conditioning circuit module and A/D modular converters on acquired board 14 convert analog signals into data signal（That is the radial displacement of main shaft）, the signal enters after industrial computer 15, analyzed and processed by signal processing and analysis software, and the analysis for carrying out spindle rotation accuracy simultaneously shows result.
The present invention compared with prior art, with advantages below：
（1）Spindle rotation accuracy real time on-line monitoring can be realized using radial rotation accuracy of main shaft on-Line Monitor Device.
（2）Propose a kind of adjustable erecting device of sensing station so that the mounting and adjusting of sensing station is eased flexibly.
（3）Using Analyses of Error Separation Techniques, the radial displacement of main shaft is monitored simultaneously on main shaft radially three directions, can isolate the deviation from circular from of main shaft, and then obtain the turn error of main shaft so that rotating accuracy is more accurate.
Brief description of the drawings
Fig. 1 is eddy current displacement sensor 1 and the inside connection diagram of support ring 3 in the present invention.
Fig. 2 is overall structure figure outside the present invention.
Fig. 3 is the plane structure chart of support ring 3.
Fig. 4 is the structure chart of adjustment block 2.
Fig. 5 is the structure chart of adapter sleeve 7.
Fig. 6 is the structure chart of fixed block 8, wherein figure a is top view, figure b be A-A to sectional view.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
Reference picture 1, the monitoring ring is by support ring 3, fixed block 8, adapter sleeve 7, adjustment block 2, lock-screw 5, rotation stopping screw 6 and the part of stop screw 4 seven composition, eddy current displacement sensor 1 is installed on fixed block 8, fixed block 8 and adjustment block 2 are connected through a screw thread with adapter sleeve 7, stop screw 4 is connected through a screw thread with support ring 3 and the head of stop screw 4 is embedded into the annular groove of adjustment block, rotation stopping screw 6 is connected through a screw thread with support ring 3 and the head of rotation stopping screw 6 is embedded in the gathering sill 24 of adapter sleeve 7, lock-screw 5 is screwed by the screw thread in support ring and withstands adapter sleeve 7.
Axial direction is located in reference picture 2,3 described eddy current displacement sensors 1, radially with three requirements of angle, in terms of axially, in same installation site, monitoring the mounting hole in three directions of ring in the same plane, and then should ensure that the center line of 3 eddy current displacement sensors 1 is coplanar；In terms of radially, the mounting axis of 3 eddy current displacement sensors 1 must intersect in same circular section, and with main-shaft axis with the intersection point in the section；In terms of angle, angle between the axis of 3,3 eddy current displacement sensors 1 of reference picture must accurately and determination, and two of which angle is
WithTo meet precise sensors setting angle requirement.
Reference picture 1, Fig. 3, Fig. 4, Fig. 5 and Fig. 6, the specific installation method of each part of the above are as follows：Adjustment block 2 is together by a threaded connection with adapter sleeve 7 first, then the probe of eddy current displacement sensor 1 is allowed to be passed through from spacing screwed hole 17 of the adjustment block 2 with adapter sleeve 7, the probe of eddy current displacement sensor 1 is connected with fixed block 8 by connection screw thread in fixed block 25 afterwards, fixed block 8 is connected through a screw thread on adapter sleeve 7 again, so these parts just constitute an overall structure；Three sets of such overall structures are put into the hole opened by certain angle in support ring 3 respectively；Kept off with stop screw 5 in the annular groove 20 of adjustment block 2, prevent that adjustment block 2 from moving up and down；Kept off with rotation stopping screw 6 in the gathering sill 24 of adapter sleeve 7, prevent that adapter sleeve 7 from rotating；Can move up and down adapter sleeve 7 and the fixed block being mounted above 8 and eddy current displacement sensor 1 by the gearing of screw thread when rotating adjustment block 2；Eddy current displacement sensor 1 is adjusted with after the distance of the periphery of main shaft 11, being tightened with lock-screw 5 and withstanding adapter sleeve 7 so that the position of eddy current displacement sensor 1 is fixed.
Connection screw thread hole 16, spacing screwed hole 17, locking screw pit 18, rotation stop screwed hole 19 are provided with reference picture 3, support ring 3 of the invention.Connection screw thread hole 16 is used to support ring 3 being 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 for installation locking screw 5, and rotation stop screwed hole 19 is used to install rotation stopping screw 6.
Reference picture 4, adjustment block 2 of the invention is provided with the outer connection screw thread 21 of annular groove 20, adjustment block and adjustment block inner chamber 22.Stop screw 4, which can be embedded into annular groove 20, to be used to prevent that adjustment block from moving in the axial direction, and the outer connection screw thread 21 of adjustment block is used for and adapter sleeve 7 is connected, wire of the adjustment block inner chamber 22 with drawing eddy current displacement sensor 1.
Reference picture 5, adapter sleeve 7 of the invention is provided with adapter sleeve inner chamber 23, gathering sill 24.The two ends of adapter sleeve inner chamber 23 are used to connect adjustment block 2 and fixed block 8, and the wire of eddy current displacement sensor 1 will be drawn from inner chamber, and rotation stopping screw 6, which is embedded into gathering sill 24, can prevent that adapter sleeve from circumferentially rotating.
Reference picture 6, fixed block 8 of the invention includes the outer connection screw thread 26 of connection screw thread 25, fixed block in fixed block.Probe of the connection screw thread 25 for the eddy current displacement sensor 1 that is connected in fixed block, the outer connection screw thread 26 of fixed block is used for and adapter sleeve connection.
The present invention operation principle be：
Position is radially monitored equipped with Sensor monitoring ring in main shaft 11, is popped one's head in thereon equipped with eddy current displacement sensor 1（For measuring main shaft radial direction displacement signal）, the fore-lying device 12 of sensor is connected with the terminal board 13 of data collecting plate card 14, is then connected to data collecting plate card 14 on industrial computer 15 by PCI slot；Main shaft 11 is under rotation work state, the voltage signal measured is converted to standard voltage signal by eddy current displacement sensor 1 through fore-lying device 12, then data signal is converted analog signals into by the signal conditioning circuit module and A/D modular converters on data collecting plate card 14, the signal is entered after industrial computer 15, the radial displacement signal of main shaft 11 is obtained by signal processing and analysis software, the deviation from circular from for isolating main shaft 11 with Analyses of Error Separation Techniques afterwards obtains the turn error of main shaft, finally shows the analysis result of spindle rotation accuracy.
It the foregoing is only one embodiment of the present invention, it is not all of or unique embodiment, those of ordinary skill in the art are claim of the invention and covered by any equivalent conversion read description of the invention and taken technical solution of the present invention.
In figure, 1, eddy current displacement sensor；2nd, adjustment block；3rd, support ring；4th, stop screw；5th, lock-screw；6th, rotation stopping screw；7th, adapter sleeve；8th, fixed block；9th, main spindle box；10th, main spindle box end cap；11st, main shaft；12nd, fore-lying device；13 terminal boards；14 data collecting plate cards；15th, industrial computer；16th, connection screw thread hole；17th, spacing screwed hole；18th, locking screw pit；19th, rotation stop screwed hole；20th, annular groove；21st, the outer connection screw thread of adjustment block；22nd, adjustment block inner chamber；23rd, adapter sleeve inner chamber；24th, gathering sill；25th, connection screw thread in fixed block；26th, the outer connection screw thread of fixed block.
Claims (6)
1. a kind of radial rotation accuracy of main shaft on-Line Monitor Device, in main shaft radial direction measurement position equipped with monitoring ring, is monitored on ring equipped with 3 eddy current displacement sensors（1）, eddy current displacement sensor（1）Fore-lying device（12）With data collecting plate card（14）Terminal board（13）It is connected, data collecting plate card（14）Industrial computer is connected to by PCI slot（15）On, it is characterised in that the monitoring ring is by support ring（3）, fixed block（8）, adapter sleeve（7）, adjustment block（2）, lock-screw（5）, rotation stopping screw（6）And stop screw（4）Seven parts are constituted, fixed block（8）Upper installation eddy current displacement sensor（1）, fixed block 8 and adjustment block（2）With adapter sleeve（7）It is connected through a screw thread, stop screw（4）With support ring（3）It is connected through a screw thread and by stop screw（4）Head be embedded into adjustment block（2）Annular groove in, rotation stopping screw（6）With support ring（3）It is connected through a screw thread and by rotation stopping screw（6）Head be embedded in adapter sleeve（7）Gathering sill in, lock-screw（5）Screwed by the screw thread in support ring and withstand adapter sleeve（7）.
2. a kind of radial rotation accuracy of main shaft on-Line Monitor Device according to claim 1, it is characterised in that 3 described eddy current displacement sensors（1）Axial direction, three requirements of radial direction and angle are located, axially aspect, in same installation site, monitoring the mounting hole in three directions of ring in the same plane, and then should ensure 3 eddy current displacement sensors（1）Center line it is coplanar；In terms of radially, 3 eddy current displacement sensors（1）Mounting axis must intersect in same circular section, and with main-shaft axis with the intersection point in the section；In terms of angle, 3 eddy current displacement sensors（1）Axis between angle accurately and must determine that two of which angle is
With
3. a kind of radial rotation accuracy of main shaft on-Line Monitor Device according to claim 2, it is characterised in that the support ring（3）On be provided with connection screw thread hole（16）, spacing screwed hole（17）, locking screw pit（18）, rotation stop screwed hole（19）；Connection screw thread hole（16）For by support ring（3）It is fixed on main spindle box end cap（10）On, spacing screwed hole（17）For installing stop screw（4）, locking screw pit（18）For installation locking screw（5）, rotation stop screwed hole（19）For installing rotation stopping screw（6）.
4. a kind of radial rotation accuracy of main shaft on-Line Monitor Device according to claim 2, it is characterised in that the adjustment block（2）It is provided with annular groove（20）, the outer connection screw thread of adjustment block（21）With adjustment block inner chamber（22）；Stop screw（4）It is embedded into annular groove（20）In be used to prevent that adjustment block from moving in the axial direction, the outer connection screw thread of adjustment block（21）For and adapter sleeve（7）Connection, adjustment block inner chamber（22）For drawing eddy current displacement sensor（1）Wire.
5. a kind of radial rotation accuracy of main shaft on-Line Monitor Device according to claim 2, it is characterised in that the adapter sleeve（7）It is provided with adapter sleeve inner chamber（23）, gathering sill（24）；Adapter sleeve inner chamber（23）Two ends be used for connect adjustment block（2）And fixed block（8）, and eddy current displacement sensor（1）Wire to be drawn from inner chamber, rotation stopping screw（6）It is embedded into gathering sill（24）In prevent that adapter sleeve from circumferentially rotating.
6. a kind of radial rotation accuracy of main shaft on-Line Monitor Device according to claim 2, it is characterised in that the fixed block（8）Including connection screw thread in fixed block（25）, the outer connection screw thread of fixed block（26）；Connection screw thread in fixed block（25）For the eddy current displacement sensor that is connected（1）Probe, the outer connection screw thread of fixed block（26）For being connected with adapter sleeve.
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| Application Number | Priority Date | Filing Date | Title |
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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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| CN102501137A CN102501137A (en) | 2012-06-20 |
| CN102501137B true CN102501137B (en) | 2014-01-15 |
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| CN105312964A (en) * | 2015-11-27 | 2016-02-10 | 宝鸡忠诚机床股份有限公司 | Detection method and detection device for rotation precision of precision machine tool spindle |
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