CN203156063U - Device used for regulating pretightening force of motorized spindle - Google Patents
Device used for regulating pretightening force of motorized spindle Download PDFInfo
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- CN203156063U CN203156063U CN 201320057377 CN201320057377U CN203156063U CN 203156063 U CN203156063 U CN 203156063U CN 201320057377 CN201320057377 CN 201320057377 CN 201320057377 U CN201320057377 U CN 201320057377U CN 203156063 U CN203156063 U CN 203156063U
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Abstract
The utility model provides a device used for regulating the pretightening force of a motorized spindle. The device comprises a pretightening oil cylinder, a spring, a proportional pressure regulating device and a control system, wherein the pretightening oil cylinder is located on the edge side of a bearing of the motorized spindle, spring force produced by the spring acts on an outer ring of the bearing, preload of the bearing is produced due to the combined function of hydraulic pressure of the pretightening oil cylinder and the spring force of the spring, the proportional pressure regulating device is located on a tail end shell body of the motorized spindle and is in coupling connection with the pretightening oil cylinder, the proportional pressure regulating device receives a control signal of the control system, and the control signal is relevant to current state parameters of the bearing.
Description
Technical field
The utility model relates to electric mainshaft bearing and preloads adjustment technology.
Background technology
Along with the develop rapidly of High-speed Machining Technology, obtain more and more widely application as the electric main shaft of lathe Core Feature parts.
The electricity main shaft generally adopts accurate hybrid ceramic angular contact ball bearing to deal with the requirement that runs up, bearing must be under the situation of preloading could operate as normal.Preload the end-play that not only can eliminate bearing, reduce noise and vibration, can also improve the running accuracy of bearing rigidity, main shaft, suppress the sliding friction of steel ball time rotational, thereby improve the service life of main shaft.
In general, preload more greatly, the effect that improves rigidity and running accuracy is just more good; But on the other hand, preload more greatly, frictional force is just more big, and temperature rise is just more high, may cause the burn of bearing, causes the disorderly closedown of electric main shaft.
At present, for the electric main shaft of middle and slow speed of revolution, often adopt rigidity to preload, namely utilize the width dimensions difference of bearing internal space ring and external space ring to apply and preload.This mode axis rigidity is stronger, simple in structure, but when when shafting components heating length dimension being changed, preloads size and also can correspondingly change.
For fear of because high speed centrifugation power and temperature rise change to make preloads excessively, often should adopt the mode of elastic preload for high-speed electric main shaft, namely be used as pretightning force with suitable spring force.Because the rigidity of spring is much smaller than bearing rigidity, therefore on-stream pretightning force almost remains constantly, but that shortcoming is exactly rigidity is relatively poor relatively.
More than two kinds of methods, after electric spindle mounted is finished, its preload the size just can't change and adjust.For the wider electric main shaft of operating speed scope, as its serviceability and service life are had higher requirements, should satisfy high rigidity, the high-mechanic of lower-speed state, can avoid pretightning force excessive when fast state again, two kinds of firmly beforehand meanses in the past just can not be competent fully.
Therefore, need the technical scheme of the adjustable pretension of a kind of electric main shaft badly.
The utility model content
In order to realize the adjustable pretension of electric main shaft, especially be at a high speed and the adjustable pretension under two kinds of distinct states of low speed at electric main shaft, the utility model provides a kind of device for the pretightning force of regulating electric main shaft.
In one embodiment, the utility model provides a kind of device for the pretightning force of regulating electric main shaft.This device comprises:
Pre-locking oil cylinder, described pre-locking oil cylinder is positioned at the avris of the bearing of described electric main shaft;
Spring, the spring force that described spring produces acts on the outer ring of described bearing, and preloading by the hydraulic coupling of described pre-locking oil cylinder and the spring force acting in conjunction of described spring of wherein said bearing produces;
The ratio regulator, described ratio regulator is positioned at the tail end housing of described electric main shaft, and couples with described pre-locking oil cylinder;
Control system, described ratio regulator receives the control signal of described control system, and the current state parameter of described control signal and described bearing is associated.In one embodiment, described control system comprises the state parameter harvester, be used for to gather at least one of the rotating speed of described bearing and temperature.
In one embodiment, when the rotating speed of described bearing was lower than a threshold value, described control system was controlled the output of described ratio regulator, in order to regulate the hydraulic coupling that described pre-locking oil cylinder produces, with the best pre-load value that obtains to adapt with rotating speed; When the rotating speed of described bearing was higher than a threshold value, the output pressure that described control system is controlled described ratio regulator was zero, made the spring force generation by described spring of preloading all of described bearing.
In one embodiment, described pre-locking oil cylinder is the oil cylinder that multiple spot distributes.
In one embodiment, described pre-locking oil cylinder is whole annular cylinder.
In one embodiment, described device also comprises the pull bar loose knife oil cylinder, and described ratio regulator is in parallel with described pull bar loose knife oil cylinder.
The beneficial effects of the utility model are that the electric speed of mainshaft scope of application of adjusting through present technique is wider, can satisfy the high rigidity of low speed, can satisfy the requirement of high speed constant pretightning force again, electric main shaft with respect to original state of the art, performance boost, rigidity and the machining accuracy of axis system improve, with the longer service life of electric main shaft.
Description of drawings
Above utility model content of the present utility model and the following specific embodiment can be better understood when reading by reference to the accompanying drawings.Need to prove that accompanying drawing is only as the example of claimed utility model.In the accompanying drawings, identical Reference numeral represents identical or similar element.
Fig. 1 illustrates the device according to the pretightning force that is used for the electric main shaft of adjusting of embodiment of the present utility model;
Fig. 2 illustrates the schematic diagram according to the output of the employing simple nc system control ratio regulator of an embodiment of the present utility model;
Fig. 3 illustrates the schematic diagram that comes the output of control ratio regulator according to the employing Frequency Converter Control system of an embodiment of the present utility model;
Fig. 4 illustrates the schematic diagram that comes the output of control ratio regulator according to the special-purpose control module of employing configuration electric mainshaft bearing pretightning force of an embodiment of the present utility model; And
Fig. 5 illustrates the schematic diagram that comes the output of control ratio regulator according to the large-sized numerical control system of an embodiment of the present utility model.
The specific embodiment
Below in the specific embodiment, be described in detail detailed features of the present utility model and advantage, its content is enough to make any those skilled in the art to understand technology contents of the present utility model and implements according to this, and according to the disclosed specification of this specification, claim and accompanying drawing, those skilled in the art can understand the utility model relevant purpose and advantage easily.
Fig. 1 illustrates the device according to the pretightning force that is used for the electric main shaft of adjusting of an embodiment of the present utility model.Bearing 1, pre-locking oil cylinder 2 and spring 3 are positioned at electric front-end of spindle bearing block.Pre-locking oil cylinder 2 and spring 3 are arranged in the left side of bearing 1, and its active force acts on the outer ring of bearing 1.In one embodiment, pre-locking oil cylinder 2 can be the small oil tank that multiple spot distributes.In another embodiment, pre-locking oil cylinder 2 can be integrally-built annular cylinder.
The hydraulic coupling and the spring force acting in conjunction that preload by pre-locking oil cylinder 2 of bearing 1 produce.Ratio regulator 6 and loose knife oil cylinder 5 are installed on electric main shaft tail end housing.The size of pretension oil cylinder hydraulic power by the ratio regulator (for example: proportional dump valve) realize.In one embodiment, can be at reversal valve 7 backs of original pull bar loose knife oil cylinder hydraulic circuit this ratio regulator 6 in parallel.When main shaft stops, when carrying out tool changing, pull bar loose knife oil cylinder 5 carries out loosening up, and pre-locking oil cylinder 2 is in the inoperative unloading condition.When cutter clamps, reversal valve 7 commutations, pull bar loose knife oil cylinder 5 is return, and by disk spring group clamp-on tool, simultaneously pre-locking oil cylinder 2 loads, and tool-holder is tightened to a back main shaft and begins rotation processing.
This device also can comprise control system.The control signal of ratio regulator 6 receiving control systems, control system are gathered the current state parameter of ratio regulator 6 and bearing 1, and state parameter control signal and bearing is current by intelligent computing is complementary.In one embodiment, this control system is gathered state parameters such as rotating speed, temperature, and adjusts the output to the control signal of ratio regulator 6 according to this state parameter.For example, this control system can comprise a rotating speed harvester, is used for gathering the rotating speed of bearing.When rotating speed is lower than a threshold value (middle and slow speed of revolution, for example less than 8000rpm), then control system is according to rotating speed, export corresponding control signal, the output of control ratio regulator 6, so that pre-locking oil cylinder 2 produces the oil pressure of different pressures, strengthen preloading of bearing thereby put on the piston of pre-locking oil cylinder, in order to reach the best pre-load value that adapts with rotating speed.When rotating speed was higher than a threshold value (high rotating speed is for example greater than 10000rpm), the output pressure of described control system control ratio regulator 6 was zero, and the bearing preload lotus is all produced by spring force.
This control system can adopt multiple scheme to realize.For example, can adopt simple nc system, Frequency Converter Control system, the special-purpose control module of configuration electric mainshaft bearing pretightning force, large-sized numerical control system.
Fig. 2 illustrates the schematic diagram according to the output of the employing simple nc system control ratio regulator of an embodiment of the present utility model.As shown in the figure, this scheme mainly adopts following steps:
1. when working out the workpiece procedure, in the rotating speed statement of electric main shaft operation, compile the electric mainshaft bearing pretightning force output statement of this rotating speed operation.
2. by installing the PID output board additional, output pretightning force value.
3. by automatically controlled pressure regulator valve, proportioning valve, overflow valve, regulate the pretightning force of control electric mainshaft bearing.
4. pretightning force shows in real time, and abnormal conditions are carried out monitoring alarm.
Fig. 3 illustrates the schematic diagram that comes the output of control ratio regulator according to the employing Frequency Converter Control system of an embodiment of the present utility model.As shown in the figure, this scheme mainly adopts following steps:
1. gather electric speed of mainshaft control signal from the speed monitoring end of frequency converter.
2. the control module of design specialized or PLC control, the setting by the pretightning force indicatrix etc., the output that produces the pretightning force setting value.
3. the pretightning force setting value---by controlling automatically controlled pressure regulator valve, proportioning valve, overflow valve etc., the pretightning force of electric mainshaft bearing is controlled in adjusting.
4. pretightning force shows in real time, and abnormal conditions are carried out monitoring alarm.
Fig. 4 illustrates the schematic diagram that comes the output of control ratio regulator according to the special-purpose control module of employing configuration electric mainshaft bearing pretightning force of an embodiment of the present utility model.As shown in the figure, this scheme mainly adopts following steps:
1. gather tach signal, installed additional the tachometer generator pulse tachometer circuit of encoderless etc. from electric spindle encoder end.
2. the special-purpose control module of bearing pre-fastening is gathered tach signal, and the line data of going forward side by side is handled output pretightning force control signal.
3. control signal---control automatically controlled pressure regulator valve, proportioning valve, overflow valve, the pretightning force of electric mainshaft bearing is controlled in adjusting.
4. pretightning force shows in real time, and abnormal conditions are carried out monitoring alarm.
Fig. 5 illustrates the schematic diagram that comes the output of control ratio regulator according to the large-sized numerical control system of an embodiment of the present utility model.As shown in the figure, this scheme mainly adopts following steps:
1. gather electric main shaft running speed by digital control system.
2. in digital control system, preset electric mainshaft bearing pretightning force indicatrix.
3. embed electric mainshaft bearing pretightning force function generator in system.
4. the PID of system plate is exported electric mainshaft bearing pretightning force value signal.
5. control signal---control automatically controlled pressure regulator valve, proportioning valve, overflow valve, the pretightning force of electric mainshaft bearing is controlled in adjusting.
6. digital control system shows pretightning force in real time, and abnormal conditions are carried out monitoring alarm.
Here the term of Cai Yonging and form of presentation just are used for describing, and the utility model also should not be limited to these terms and statement.Use these terms and statement and do not mean that the equivalent features of getting rid of any signal and description (or wherein part), will be appreciated that the various modifications that may exist also should be included in the claim scope.Other modifications, variation and replacement also may exist.Accordingly, claim should be considered as covering all these equivalents.
Equally, it is to be noted, though the utility model is described with reference to current specific embodiment, but those of ordinary skill in the art will be appreciated that, above embodiment illustrates the utility model, under the situation that does not break away from the utility model spirit, also can make variation or the replacement of various equivalences, therefore, as long as in connotation scope of the present utility model in the scope to the variation of above-described embodiment, claims that modification all will drop on the application.
Claims (5)
1. device of be used for regulating the pretightning force of electric main shaft is characterized in that described device comprises:
Pre-locking oil cylinder, described pre-locking oil cylinder is positioned at the avris of the bearing of described electric main shaft;
Spring, the spring force that described spring produces acts on the outer ring of described bearing, and preloading by the hydraulic coupling of described pre-locking oil cylinder and the spring force acting in conjunction of described spring of wherein said bearing produces;
The ratio regulator, described ratio regulator is positioned at the tail end housing of described electric main shaft, and couples with described pre-locking oil cylinder;
Control system, described ratio regulator receives the control signal of described control system, and the current state parameter of described control signal and described bearing is associated.
2. device as claimed in claim 1 is characterized in that, described control system comprises the state parameter harvester, at least a in the rotating speed that is input as described bearing of described state parameter harvester and the temperature.
3. device as claimed in claim 1 is characterized in that, described pre-locking oil cylinder is the oil cylinder that multiple spot distributes.
4. device as claimed in claim 1 is characterized in that, described pre-locking oil cylinder is whole annular cylinder.
5. device as claimed in claim 1 is characterized in that, also comprises the pull bar loose knife oil cylinder, and described ratio regulator is in parallel with described pull bar loose knife oil cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320057377 CN203156063U (en) | 2013-01-31 | 2013-01-31 | Device used for regulating pretightening force of motorized spindle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320057377 CN203156063U (en) | 2013-01-31 | 2013-01-31 | Device used for regulating pretightening force of motorized spindle |
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| Publication Number | Publication Date |
|---|---|
| CN203156063U true CN203156063U (en) | 2013-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320057377 Expired - Fee Related CN203156063U (en) | 2013-01-31 | 2013-01-31 | Device used for regulating pretightening force of motorized spindle |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103084589A (en) * | 2013-01-31 | 2013-05-08 | 上海大众祥易机电技术有限公司 | Device for adjusting preload force of electric spindle |
| CN104148679A (en) * | 2014-08-14 | 2014-11-19 | 辽宁西格马数控机床有限公司 | Main shaft of numerical control machine tool |
| CN104615166A (en) * | 2013-11-01 | 2015-05-13 | 中国科学院西安光学精密机械研究所 | Thermal micro-adjustment system and method for pre-tightening force of space rotary table shafting |
| CN105538039A (en) * | 2016-02-05 | 2016-05-04 | 河南正航主轴科技有限公司 | Intelligent electric spindle control implementation method |
| CN109945767A (en) * | 2019-03-15 | 2019-06-28 | 湖北三江航天万峰科技发展有限公司 | A kind of positioning and orientation system indexing mechanism angular contact bearing pretightning force adjusting method |
-
2013
- 2013-01-31 CN CN 201320057377 patent/CN203156063U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103084589A (en) * | 2013-01-31 | 2013-05-08 | 上海大众祥易机电技术有限公司 | Device for adjusting preload force of electric spindle |
| CN104615166A (en) * | 2013-11-01 | 2015-05-13 | 中国科学院西安光学精密机械研究所 | Thermal micro-adjustment system and method for pre-tightening force of space rotary table shafting |
| CN104615166B (en) * | 2013-11-01 | 2017-05-03 | 中国科学院西安光学精密机械研究所 | Thermal micro-adjustment system and method for pre-tightening force of space rotary table shafting |
| CN104148679A (en) * | 2014-08-14 | 2014-11-19 | 辽宁西格马数控机床有限公司 | Main shaft of numerical control machine tool |
| CN105538039A (en) * | 2016-02-05 | 2016-05-04 | 河南正航主轴科技有限公司 | Intelligent electric spindle control implementation method |
| CN105538039B (en) * | 2016-02-05 | 2018-01-30 | 河南正航主轴科技有限公司 | Intelligent electro spindle controls implementation |
| CN109945767A (en) * | 2019-03-15 | 2019-06-28 | 湖北三江航天万峰科技发展有限公司 | A kind of positioning and orientation system indexing mechanism angular contact bearing pretightning force adjusting method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130828 Termination date: 20170131 |