CN1546263A - High speed main shaft pretension method and apparatus by integration of constant pressure pretension with positioning pretension - Google Patents
High speed main shaft pretension method and apparatus by integration of constant pressure pretension with positioning pretension Download PDFInfo
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- CN1546263A CN1546263A CNA2003101105816A CN200310110581A CN1546263A CN 1546263 A CN1546263 A CN 1546263A CN A2003101105816 A CNA2003101105816 A CN A2003101105816A CN 200310110581 A CN200310110581 A CN 200310110581A CN 1546263 A CN1546263 A CN 1546263A
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- main shaft
- pretension
- bearing
- pretightening
- level pressure
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000010354 integration Effects 0.000 title 1
- 230000036316 preload Effects 0.000 description 16
- 230000006378 damage Effects 0.000 description 5
- 230000003116 impacting effect Effects 0.000 description 4
- 230000009183 running Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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Abstract
The invention discloses a kind of high speed main shaft pretightening method and device which combines pressure pretightening and allocation pretightening, it sets pressure pretightening and allocation pretightening to the bearing in the high speed main shaft, when tearing the main shaft or the main shaft runs with low speed, the pretightening mode to the main bearing of the device is allocation pretightening; when the main shaft runs with high speed, the temperature rise of bearing causes the deformation to the main shaft along the axis direction, the mode of pretightening mode of the device is pressure pretightening. The device sets outer barrel, spring barrel and inner barrel between the two groups of main shaft bearings, there sets spring in the spring barrel, the sum of the lengths of the outer barrel and the spring barrel is equal to the length of the inner barrel. The invention combines the two pretightening methods.
Description
Technical field the invention belongs to mechanical manufacturing field, is specifically related to a kind of pre-clamping method of high-speed processing machine tool high speed main shaft and realizes the device of this method.
The background technique high-speed main spindle is the key feature of high-speed processing machine tool.High-speed main spindle realizes that the key of high speed and precision processing is that main shaft not only can run up in operation process, and running accuracy height, vibration are little, and main shaft has enough rigidity and bears radial and axial chip-load simultaneously.Realize speed, precision and the rigidity requirement of above-mentioned main shaft, one of key technology applies appropriate preload to main shaft bearing exactly.But main shaft is in running, because bearing heating produces factor affecting such as spindle deformation, the preload of bearing is constantly changing.Should Bearing preload appropriate, require preload stable again, and will guarantee the easy installation and removal of main shaft and bearing, become one of the key issue that will consider in the main shaft design.
The firmly beforehand means that the tradition main shaft bearing adopts is single level pressure firmly beforehand means or location firmly beforehand means.The level pressure pretension helps main shaft and realizes speed up, and when main shaft caused the main shaft elongation because of temperature distortion, the level pressure pretension can compensate the distortion of main shaft automatically by camber of spring, and guaranteed that the preload of bearing is constant substantially.The deficiency of this firmly beforehand means is during from bearing saddle bore dismounting main shaft and bearing, owing to have the gap between the sleeve of both ends of the spring, need axial impact or compressing main shaft, and by main shaft upper bearing (metal) inner ring and spin bearing outer ring is applied active force and just can make bearing break away from bearing support, be easy to damage bearing.The location firmly beforehand means is owing to saved component such as spring, and structure is simple relatively, has obtained extensive use in the not high occasion of rate request, and its dismounting is also simple and easy to do.But when spindle speed was very high, because bearing temperature rise is higher, elongation strain can take place in main shaft vertically, and this distortion can cause Bearing preload to change; If preload increases, can cause bearing temperature further to raise, shorten bearing working life, the stuck or burnout failure of bearing takes place when serious; If preload reduces, can produce negative effects such as main axis stiffness decline, limit speed reduction and running accuracy reduction.
Summary of the invention technical problem to be solved by this invention is to provide a kind of level pressure pretension and locatees pre-clamping method of high-speed main spindle and the device that pretension combines, it can not only be when main shaft runs up, can compensate the distortion of main shaft by camber of spring automatically, guarantee that the preload of bearing is constant substantially; And when dismounting main shaft and bearing, can be directly by impacting or the compressing bearing outer ring make bearing break away from bearing saddle bore, can not produce destruction to bearing ball and inside and outside raceway.
The present invention solves above-mentioned technical problem by following technological scheme: the pre-clamping method of high-speed main spindle that level pressure pretension of the present invention combines with the location pretension, it is characterized in that it is that the bearing in the high-speed main spindle is provided with the pre-tightening apparatus that the level pressure pretension combines with the location pretension, when dismounting main shaft or main shaft when turning round under the low speed, this device is the location pretension to firmly beforehand means of main shaft bearing; When main shaft ran up, the main shaft bearing temperature rise made main shaft that elongation strain take place vertically, and this device becomes the level pressure pretension to the firmly beforehand means of main shaft bearing.
The device of the pre-clamping method of high-speed main spindle that the above-mentioned level pressure pretension of the invention process combines with the location pretension, it is characterized in that: it is to be provided with outer sleeve, spring spool and inner sleeve between two groups of main shaft bearings, be provided with spring in the spring spool, the length sum of described outer sleeve and spring spool and the equal in length of inner sleeve.
Described outer sleeve is provided with and makes itself and main shaft casing that the locating stud that axially relatively moves not take place.
The present invention combines the level pressure pretension of main shaft in the high-speed processing machine tool effectively with the pre-clamping method in location, has overcome the shortcoming of single location firmly beforehand means or level pressure firmly beforehand means.When dismounting main shaft or main shaft when turning round under the low speed, bearing outside tube and spring spool are in contact condition, main shaft bearing mainly shows as the location firmly beforehand means; Can directly make bearing break away from bearing saddle bore during dismounting, can not produce destruction bearing ball and inside and outside raceway by impacting or oppressing bearing outer ring.When main shaft runs up, because bearing temperature rise makes main shaft that elongation strain take place vertically, cause bearing outside tube and spring spool separating contacting state, bearing becomes the level pressure firmly beforehand means; Can compensate the distortion of main shaft by camber of spring automatically, guarantee that the preload of bearing is constant substantially, to adapt to the needs of main shaft speed up.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Each label is represented among the figure:
1, main shaft bearing, 2, spring spool, 3, spring, 4, outer sleeve,
5, inner sleeve, 6, locating stud, 7, main shaft, 8, the main shaft casing.
Embodiment
The pre-clamping method of high-speed main spindle that level pressure pretension of the present invention combines with the location pretension, it is that the bearing in the high-speed main spindle is provided with the pre-tightening apparatus that the level pressure pretension combines with the location pretension, when dismounting main shaft or main shaft when turning round under the low speed, this device is the location pretension to firmly beforehand means of main shaft bearing; Can directly make bearing break away from bearing saddle bore during dismounting, can not produce destruction bearing ball and inside and outside raceway by impacting or oppressing bearing outer ring.When main shaft ran up, the main shaft bearing temperature rise made main shaft that elongation strain take place vertically, and this device becomes the level pressure pretension to the firmly beforehand means of main shaft bearing; It can compensate the distortion of main shaft automatically by camber of spring, and guarantees that the preload of bearing is constant substantially.
As shown in Figure 1, the device of the pre-clamping method of high-speed main spindle that the above-mentioned level pressure pretension of the invention process combines with the location pretension, be to be provided with outer sleeve 4, spring spool 2 and inner sleeve 51 of two groups of main shaft bearing, be provided with spring 3 in the spring spool 2, outer sleeve 4 and the length sum of spring spool 2 and the equal in length of inner sleeve 5.Both error in lengths should guarantee that the actual preload of main shaft bearing 1 in the preload that allows, is generally less than 50 microns.Outer sleeve 4 is provided with locating stud 6, is fixed on the main shaft casing 8 by this locating stud 6, makes itself and main shaft casing 8 not take place axially to relatively move.
Working principle of the present invention is: during main shaft 7 low-speed runnings, because of outer sleeve 4 and the length sum of spring spool 2 and the equal in length of inner sleeve 5, the crack is zero between outer sleeve 4 and the spring spool 2, the firmly beforehand means of main shaft bearing 1 shows as the location pretension, at this moment, the preload of main shaft bearing 1 is by the relative position decision of each abutment sleeve of the inside and outside circle of the main shaft bearing left and right sides.And dismounting is during main shaft 7, can be directly by impacting or compressing main shaft bearing 1 outer ring make main shaft bearing 1 break away from bearing saddle bore, can not produce destruction to the spin and the inside and outside raceway of main shaft bearing 1.When main shaft 7 ran up, main shaft bearing 1 temperature rise made main shaft 7 heatings, and elongation strain takes place vertically, and the gap between outer sleeve 4 and the spring spool 2 no longer is zero; Because the generation in gap, at this moment, the firmly beforehand means of main shaft bearing 1 shows as the level pressure pretension, and the preload of main shaft bearing 1 is by the amount of deformation decision of spring 3; Can compensate the distortion of main shaft 7 by the distortion of spring 3 automatically, guarantee that the preload of main shaft bearing 1 is constant substantially.
Claims (3)
1, a kind of level pressure pretension and the location pre-clamping method of high-speed main spindle that combines of pretension, it is characterized in that it is that the bearing in the high-speed main spindle is provided with the pre-tightening apparatus that the level pressure pretension combines with the location pretension, when dismounting main shaft or main shaft when turning round under the low speed, this device is the location pretension to firmly beforehand means of main shaft bearing; When main shaft ran up, the main shaft bearing temperature rise made main shaft that elongation strain take place vertically, and this device becomes the level pressure pretension to the firmly beforehand means of main shaft bearing.
2, the high-speed main spindle pre-tightening apparatus that combines with the location pretension of a kind of level pressure pretension of implementing the described method of claim 1, it is characterized in that: it is to be provided with outer sleeve (4), spring spool (2) and inner sleeve (5) between two groups of main shaft bearings (1), be provided with spring (3) in the spring spool (2), described outer sleeve (4) and the length sum of spring spool (2) and the equal in length of inner sleeve (5).
3, level pressure pretension according to claim 2 and the location high-speed main spindle pre-tightening apparatus that combines of pretension is characterized in that described outer sleeve (4) is provided with to make itself and main shaft casing (8) that the locating stud (6) that axially relatively moves not take place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310110581 CN1259162C (en) | 2003-11-28 | 2003-11-28 | High speed main shaft pretension method and apparatus by integration of constant pressure pretension with positioning pretension |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310110581 CN1259162C (en) | 2003-11-28 | 2003-11-28 | High speed main shaft pretension method and apparatus by integration of constant pressure pretension with positioning pretension |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1546263A true CN1546263A (en) | 2004-11-17 |
| CN1259162C CN1259162C (en) | 2006-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310110581 Expired - Fee Related CN1259162C (en) | 2003-11-28 | 2003-11-28 | High speed main shaft pretension method and apparatus by integration of constant pressure pretension with positioning pretension |
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| Country | Link |
|---|---|
| CN (1) | CN1259162C (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100368126C (en) * | 2006-03-08 | 2008-02-13 | 浙江大学 | Small high-speed constant-pressure prepressing apparatus of main bearing |
| CN100402206C (en) * | 2006-02-10 | 2008-07-16 | 东南大学 | Intelligent high speed machining of electric main shaft with controllable pre-fastening force |
| CN101704117B (en) * | 2009-07-06 | 2012-09-26 | 厦门精合电气自动化有限公司 | High-speed mainshaft bearing constant-pressure pre-loading device |
| CN102974972A (en) * | 2012-12-05 | 2013-03-20 | 中国南方航空工业(集团)有限公司 | Bearing constant-pressure pretightening device and selective assembly method thereof |
| CN103223499A (en) * | 2013-04-07 | 2013-07-31 | 北京航空航天大学 | Device capable of improving axial rigidity of main shaft of precision machine tool with adjustable bearing pre-tightening force |
| CN103691972A (en) * | 2013-12-25 | 2014-04-02 | 北京海普瑞森科技发展有限公司 | Main shaft rotary device |
| CN108817422A (en) * | 2018-08-30 | 2018-11-16 | 广东今科机床有限公司 | A kind of composite metal stock-removing machine main shaft |
| CN109210091A (en) * | 2017-08-23 | 2019-01-15 | 中国航空制造技术研究院 | A kind of disassembly and assembly structure of large-scale heavy duty main shaft |
| CN106670510B (en) * | 2016-12-16 | 2019-07-23 | 西安交通大学 | A kind of machine tool mainshaft bearing pretightning force automatic regulating system and method based on hydraulic control |
| CN112122625A (en) * | 2020-09-15 | 2020-12-25 | 南京非云天电子商务有限公司 | Intelligent manufacturing cutting machine tool device capable of avoiding increase of resistance of main shaft bearing |
-
2003
- 2003-11-28 CN CN 200310110581 patent/CN1259162C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100402206C (en) * | 2006-02-10 | 2008-07-16 | 东南大学 | Intelligent high speed machining of electric main shaft with controllable pre-fastening force |
| CN100368126C (en) * | 2006-03-08 | 2008-02-13 | 浙江大学 | Small high-speed constant-pressure prepressing apparatus of main bearing |
| CN101704117B (en) * | 2009-07-06 | 2012-09-26 | 厦门精合电气自动化有限公司 | High-speed mainshaft bearing constant-pressure pre-loading device |
| CN102974972A (en) * | 2012-12-05 | 2013-03-20 | 中国南方航空工业(集团)有限公司 | Bearing constant-pressure pretightening device and selective assembly method thereof |
| CN103223499A (en) * | 2013-04-07 | 2013-07-31 | 北京航空航天大学 | Device capable of improving axial rigidity of main shaft of precision machine tool with adjustable bearing pre-tightening force |
| CN103223499B (en) * | 2013-04-07 | 2015-02-25 | 北京航空航天大学 | Device capable of improving axial rigidity of main shaft of precision machine tool with adjustable bearing pre-tightening force |
| CN103691972A (en) * | 2013-12-25 | 2014-04-02 | 北京海普瑞森科技发展有限公司 | Main shaft rotary device |
| CN106670510B (en) * | 2016-12-16 | 2019-07-23 | 西安交通大学 | A kind of machine tool mainshaft bearing pretightning force automatic regulating system and method based on hydraulic control |
| CN109210091A (en) * | 2017-08-23 | 2019-01-15 | 中国航空制造技术研究院 | A kind of disassembly and assembly structure of large-scale heavy duty main shaft |
| CN108817422A (en) * | 2018-08-30 | 2018-11-16 | 广东今科机床有限公司 | A kind of composite metal stock-removing machine main shaft |
| CN112122625A (en) * | 2020-09-15 | 2020-12-25 | 南京非云天电子商务有限公司 | Intelligent manufacturing cutting machine tool device capable of avoiding increase of resistance of main shaft bearing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1259162C (en) | 2006-06-14 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Hunan Allonward Hydro-Generating Equipment Co., Ltd. Assignor: Hunan University Contract fulfillment period: 2008.3.31 to 2014.3.31 Contract record no.: 2009430000173 Denomination of invention: High speed main shaft pretension method and apparatus by integration of constant pressure pretension with positioning pretension Granted publication date: 20060614 License type: Exclusive license Record date: 20091027 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.3.31 TO 2014.3.31; CHANGE OF CONTRACT Name of requester: HUNAN ALLONWARD HYDRO-GENERATING EQUIPMENT CO.,LTD Effective date: 20091027 |
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| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: Hunan Allonward Hydro-Generating Equipment Co., Ltd. Assignor: Hunan University Contract record no.: 2009430000173 Date of cancellation: 20120806 |
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| ASS | Succession or assignment of patent right |
Owner name: XIANGTAN SANFENG CNC MACHINE TOOL CO., LTD. Free format text: FORMER OWNER: HUNAN UNIVERSITY Effective date: 20121225 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 410082 CHANGSHA, HUNAN PROVINCE TO: 411201 XIANGTAN, HUNAN PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20121225 Address after: 411201 Hunan province Xiangtan City Jiuhua Industrial Park, No. 3 West unlimited Patentee after: Xiangtan Sanfeng CNC Machine Tool Co., Ltd. Address before: High efficiency grinding engineering center Hunan University Hunan 410082 West Mount Yuelu national Changsha City Patentee before: Hunan University |
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| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: Hunan Allonward Hydro-Generating Equipment Co., Ltd. Assignor: Hunan University Contract record no.: 2009430000173 Date of cancellation: 20120806 |
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| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: High speed main shaft pretension method and apparatus by integration of constant pressure pretension with positioning pretension Effective date of registration: 20150529 Granted publication date: 20060614 Pledgee: Bank of Beijing Limited by Share Ltd Changsha branch Pledgor: Xiangtan Sanfeng CNC Machine Tool Co., Ltd. Registration number: 2015430000011 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060614 Termination date: 20181128 |