CN2668302Y - High speed spindle variable rigidity device - Google Patents
High speed spindle variable rigidity device Download PDFInfo
- Publication number
- CN2668302Y CN2668302Y CNU2003201142401U CN200320114240U CN2668302Y CN 2668302 Y CN2668302 Y CN 2668302Y CN U2003201142401 U CNU2003201142401 U CN U2003201142401U CN 200320114240 U CN200320114240 U CN 200320114240U CN 2668302 Y CN2668302 Y CN 2668302Y
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- CN
- China
- Prior art keywords
- spring
- bearing
- main shaft
- high speed
- adjusting screw
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Turning (AREA)
Abstract
The utility model discloses a high speed spindle variable rigidity device, characterized in that the utility model comprises a stand (1), a spindle (3), a front bearing (2) and a back bearing (7). The spindle (3) is arranged in the dead eye of the stand (1) through the front bearing (2) and the back bearing (7). One end of the back bearing (7) is provided with a spring clamp sleeve (6) connected with the outer ring of the bearing, and the other end of the spring clamp sleeve (6) is connected with an adjusting screw (4). The external screw-threads of the adjusting screw (4) are engaged with the internal screw-threads of an end housing (5) arranged on the stand (1). The utility model can alter the preload of the bearings to alter the rigidity and dynamic characteristic of the spindle so that the static and dynamic characteristic of the high speed spindle can be tested under the condition of different preload of the bearings; the high speed spindle variable rigidity device can also be used directly in the product designing of the high speed spindle.
Description
Technical field: the utility model belongs to mechanical manufacturing field, is specifically related to the variable stiffness apparatus of a kind of high speed machine main shaft, electric main shaft.
Background technique: high speed machining is one of focal spot techniques of the domestic and international keen competition of present manufacture field, and High-speed machining has been represented a present manufacturing great development trend; And the high-speed main spindle unit is the key feature that realizes in the high-speed machine tool of high speed and precision processing, and the quality of high-speed main spindle design, manufacturing and performance directly affects the overall development level of high-speed processing machine tool; One of important mechanism problem that exists in high-speed main spindle design, manufacturing and the operation process, be that the high speed and precision main shaft bearing is under different preload conditions, significant change can take place in the rigidity of main shaft and natural frequency, thereby makes the dynamic characteristic of machine tool chief axis and utilize the quality generation notable difference of this main shaft operative workpiece.And do not have special being used to change principle axis shafting rigidity and dynamic characteristic at present, thereby method and device that realization is tested the Changing Pattern and the main shaft characteristic of rigidity.The preload of existing main shaft structure middle (center) bearing is normally constant, can not regulate in running and test process.
Model utility content technical problem to be solved in the utility model provides a kind of high-speed main spindle variable stiffness apparatus that carries out, it can change the rigidity and the dynamic characteristic of main shaft by the preload that changes bearing, to carry out static state and the dynamic characteristic test of high-speed main spindle under different Bearing preload conditions; Also can directly apply in the product specification of high-speed main spindle.
The utility model solves the problems of the technologies described above the technological scheme that is adopted: it comprises support, main shaft, fore bearing and rear bearing, main shaft is installed in the bearing hole of support by forward and backward bearing, described rear bearing one end is provided with the spring compression sleeve that joins with this bearing outer ring, the other end and the adjusting screw rod of spring compression sleeve join, and the outside thread of described adjusting screw rod screws mutually with end cap internal thread on being loaded on support.
As further improvement of the utility model, described spring compression sleeve is made up of spring seat, spring and spring pressure ring, and spring seat and rear bearing outer ring join, and spring is arranged in the spring eye that spring seat offers, spring pressure ring one end and spring join, and the other end and adjusting screw rod join.
The bearing hole of described support is divided into two sections in fore bearing hole and rear bearing hole, in separated.
The beneficial effects of the utility model are: the utility model adopts spring pressure that the front and back bearings outer ring is produced preload, by the Regulation spring decrement, the preload of bearing is changed, and then the rigidity of main shaft changes.It can be in the spindle operation process, by regulating the screw-in amount of adjusting screw rod, the preload of online adjusting bearing, thereby the rigidity and the dynamic characteristic of change principle axis shafting.By testing apparatus, can carry out static state and the dynamic characteristic test of high-speed main spindle under different Bearing preload conditions, obtain the characteristic variations rule of the continuous situation of change lower main axis of preload.Front and back bearings of main shaft of the present utility model hole directly is arranged on the support, is connected as a single entity with support, and the good rigidly of main shaft support, support can directly be fixed on the basis easy installation and removal.And the bearing hole of support of the present utility model is different with common integral through-hole, separated forward and backward two section type structure in having adopted, the stage casing main shaft is exposed, be convenient to observe the working order of stage casing main shaft, also in the past the working order of front and back bearings is observed in the both sides in rear bearing block hole.The utility model also can directly apply to the design of high-speed main spindle product.
Description of drawings
Fig. 1 is the utility model embodiment's a structural representation.
Each label is represented among the figure:
1, support 2, fore bearing 3, main shaft 4, adjusting screw rod
5, end cap 6, spring compression sleeve 7, rear bearing 8, plexiglass
9, plexiglass 11, fore bearing hole 12, rear bearing hole 61, spring pressure ring
62, spring 63, spring seat
Embodiment: as shown in Figure 1, the utility model comprises support 1, main shaft 3, fore bearing 2 and rear bearing 7, main shaft 3 is installed in the bearing hole of support 1 by forward and backward bearing 2,7, this bearing hole directly is machined on the support 1, with support 1 be an integral body, guaranteed the rigidity that main shaft 3 supports, and this bearing hole is divided into 12 2 sections in fore bearing hole 11 and rear bearing hole, in separated so that observe the working order in main shaft 3 stage casings.Rear bearing 7 one ends are provided with the spring compression sleeve 6 that joins with this bearing outer ring, spring compression sleeve 6 is made up of spring seat 63, spring 62 and spring pressure ring 61, spring seat 63 joins with rear bearing 7 outer rings, spring 62 is arranged in the spring eye that spring seat 63 offers, spring pressure ring 61 1 ends and spring 62 join, the other end and adjusting screw rod 4 join, and the outside thread of adjusting screw rod 4 matches with the internal thread of end cap 5 on being loaded on support 1.Spring compression sleeve 6 preload of bearing 2,7 is changed, and then the rigidity of main shaft 3 changes by the decrement of adjusting screw rod 4 Regulation springs 62.Be respectively arranged with plexiglass 9,8 on the right side of forward and backward bearing hole 11,12, so that from two sections bearing holes in front and back 11,12, observe the working order of front and back bearings 2,7.
Working principle of the present utility model is: the preload of front and back bearings is by regulating the degree of depth that adjusting screw rod 4 screws in the end cap 5, and the decrement that changes spring 62 is regulated.The outside thread of adjusting screw rod 4 matches with the internal and external threads of end cap 5; Spring pressure ring 61 can move in rear bearing hole 12 under the spinning effect of adjusting screw rod 4, and by pressure spring 62 and spring seat 63, forward and backward bearing 2,7 outer rings is produced precompression.After precompression changed, corresponding change can take place in the radial rigidity of bearing and axial rigidity; And then the rigidity of whole main shaft 3 systems also can change.
Main shaft 3 is in movement process, and decrement that can online Regulation spring 62 is with the vibration characteristics of test main shaft 3 under the continuous change condition of bearing rigidity; This is that existing main shaft structure is irrealizable.
Decrement by test spring 62 can calculate the preloading pressure that bearing bears; Under different Bearing preload conditions, main shaft 3 runnings, and utilize vibration testing instrument to note displacement, speed or the acceleration signal of main shaft 3 vibrations, carry out natural frequency and mode that signal analysis can measure axis system.Record and the relation of statistics between amount of spring compression, bearing rigidity and main shaft natural frequency and the mode just can deeply be familiar with the dynamic characteristic of axis system, thereby provide theoretical foundation for design, maintenance, the adjustment of main shaft.
Claims (4)
1, a kind of high-speed main spindle variable stiffness apparatus, it is characterized in that it comprises support (1), main shaft (3), fore bearing (2) and rear bearing (7), main shaft (3) is installed in the bearing hole of support (1) by forward and backward bearing (2), (7), described rear bearing (7) one ends are provided with the spring compression sleeve (6) that joins with this bearing outer ring, the other end of spring compression sleeve (6) and adjusting screw rod (4) join, and the outside thread of described adjusting screw rod (4) screws mutually with end cap (5) internal thread on being loaded on support (1).
2, according to the described high-speed main spindle variable stiffness apparatus of claim 1, it is characterized in that described spring compression sleeve (6) is made up of spring seat (63), spring (62) and spring pressure ring (61), spring seat (63) joins with rear bearing (7) outer ring, spring (62) is arranged in the spring eye that spring seat (63) offers, spring pressure ring (61) one ends and spring (62) join, and the other end and adjusting screw rod (4) join.
3, according to claim 1 or 2 described high-speed main spindle variable stiffness apparatus, the bearing hole that it is characterized in that described support (1) is divided into (12) two sections in fore bearing hole (11) and rear bearing hole, in separated.
4,, it is characterized in that the right side of described forward and backward bearing hole (11), (12) is respectively arranged with plexiglass (9), (8) according to the described high-speed main spindle variable stiffness apparatus of claim 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2003201142401U CN2668302Y (en) | 2003-11-28 | 2003-11-28 | High speed spindle variable rigidity device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2003201142401U CN2668302Y (en) | 2003-11-28 | 2003-11-28 | High speed spindle variable rigidity device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2668302Y true CN2668302Y (en) | 2005-01-05 |
Family
ID=34438899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2003201142401U Expired - Fee Related CN2668302Y (en) | 2003-11-28 | 2003-11-28 | High speed spindle variable rigidity device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2668302Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101344457B (en) * | 2008-08-27 | 2010-10-06 | 重庆大学 | Non-contact type magnetic coupling dynamic test apparatus and method for high speed principal shaft |
| CN102554280A (en) * | 2011-12-16 | 2012-07-11 | 上海大学 | High speed electric spindle with preload control device |
-
2003
- 2003-11-28 CN CNU2003201142401U patent/CN2668302Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101344457B (en) * | 2008-08-27 | 2010-10-06 | 重庆大学 | Non-contact type magnetic coupling dynamic test apparatus and method for high speed principal shaft |
| CN102554280A (en) * | 2011-12-16 | 2012-07-11 | 上海大学 | High speed electric spindle with preload control device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |