CN206154012U - Accurate movable center device - Google Patents
Accurate movable center device Download PDFInfo
- Publication number
- CN206154012U CN206154012U CN201621198797.1U CN201621198797U CN206154012U CN 206154012 U CN206154012 U CN 206154012U CN 201621198797 U CN201621198797 U CN 201621198797U CN 206154012 U CN206154012 U CN 206154012U
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- ring
- bearing
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- cover
- bearing holder
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Abstract
The utility model provides a cutting process of accurate movable center device, the large -scale mechanical component of mainly used. The middle part conical surface of top dabber is equipped with adjustable radial clearance's the short cylindrical roller bearing of interior awl, and the middle part suit can bear great axial load's the short cylindrical roller bearing of thrust, the adjustable axle clearance's of afterbody suit angular contact ball bearing. The utility model discloses small, it is big that the radial axial load of reaching bears in the institute, can effectively reduce the damage of top breaker roll centre bore, makes grinding roll ovality reach within the 0.01mm, and the roughness reaches ra0.2 to improve roll grinding precision and life.
Description
Technical field
The utility model is related to machining technology field, specifically a kind of precision movable center device.
Background technology
With industrial expansions such as iron and steel, ship, space flight, the domestic research to heavily loaded high precision numerical control roll grinder is subject to
Greatly pay attention to.Roll grinder is the special purpose grinder grown up on the basis of cylindrical grinder, in roll grinder top grinding machine tool
In, it is top directly to bear roll gravity, it is the maximum part of stress and deformation in whole lathe.Top bearing capacity decides
The grinding accuracy of roll periphery, therefore design the suitable top pith for becoming grinding machine design.
The live centre of common performance, its performance can meet the processing of general lathe and use substantially.But with numerical control machine
Bed, special purpose machine tool, the popularization of other type lathes and use in a large number, large-scale component is cut with heavy mechanical equipment, due to large-scale
Mechanical component is larger, needs to use rolling center in cutting process, and existing rolling center has thrust and is not enough to
And the not high defect of machining accuracy.
The content of the invention
To overcome the deficiencies in the prior art, goal of the invention of the present utility model is to provide a kind of precision movable center dress
Put, to improve the grinding accuracy and efficiency of CNC roll grinder.
For achieving the above object, the middle part conical surface of the top mandrel of the utility model is equipped with the interior of adjustable radial clearance
Cone cylindrical roller bearing, middle part suit can bear the cylindrical roller thrust bearing of larger axial load, and afterbody suit is adjustable
The angular contact ball bearing of whole axial gap.
The left end head of the top mandrel is in mating connection with roll centre hole；Inner cone on the conical surface of top mandrel middle part
The inner ring of cylindrical roller bearing is positioned with locking nut, and the jackscrew and copper billet in locking nut is locking for locking nut, copper
Block is placed between top mandrel and jackscrew, and the both sides of inner cone cylindrical roller bearing outer ring are left by being sleeved on top mandrel respectively
The boss of the big back-up ring on end, the endoporus step of bearing holder (housing, cover) are fixed, and the cylindrical of outer ring is placed in the hole of bearing holder (housing, cover)；The short circle of thrust
The blowout patche of post roller bearing is fixed on the middle part of top mandrel, and seat ring is fixed in bearing holder (housing, cover), cylindrical roller thrust bearing
The endoporus step of step, bearing holder (housing, cover) axially through top mandrel is fixed, and the cylindrical of cylindrical roller thrust bearing seat ring is placed in
In the hole of bearing holder (housing, cover)；The inner ring of angular contact ball bearing is positioned with back-up ring, and back-up ring is by being sleeved in the centring ring on top mandrel
Little jackscrew adjustment pretension, the collar axial restraint centring ring being mounted on top mandrel, the outer ring both sides of angular contact ball bearing point
Do not positioned by being fixed on the outer back-up ring of bearing holder (housing, cover) right part, the endoporus step of bearing holder (housing, cover) with screw three, angular contact ball bearing is
Two row；Big back-up ring screw one is fixed on the left part of bearing holder (housing, cover), and big back-up ring is built with sealing ring；The positioning at the middle part of bearing holder (housing, cover)
The conical surface is felt relieved with the grinding machine headstock conical surface, and screw two is fixed on bearing holder (housing, cover) on the grinding machine headstock.
The top mandrel be adopt the quenched nitrogen treatment of steel alloy, circular runout for 0.001-0.005mm top core
Axle；Bearing holder (housing, cover) is the bearing holder (housing, cover) using steel alloy Carburization Treatment；Big back-up ring is using the big back-up ring of oxidation processes.
The utility model compared with prior art, bear radially and axial load be big, can effectively reduce top by small volume
Damage to roll centre hole, makes grinding roller ovality reach within 0.01mm, and roughness reaches Ra0.2, rolls so as to improve
Roller grinding accuracy and service life.
Description of the drawings
Fig. 1 is structure diagram of the present utility model.
Specific embodiment
As shown in figure 1, the left end head of the top mandrel 1 of the utility model is in mating connection with roll centre hole.
Inner cone cylindrical roller bearing 5 of the middle part conical surface of top mandrel 1 equipped with adjustable radial clearance；Inner cone short cylindrical
The inner ring locking nut 9 of roller bearing 5 is positioned, and the jackscrew 7 in locking nut 9 is locking for locking nut 9, and copper billet 8 is placed in
Between top mandrel 1 and jackscrew 7, can be by locking nut 9, between adjustment inner cone cylindrical roller bearing 5 and top mandrel 1
Radial clearance, makes the flexible rotation of top mandrel 1, bears larger radial load, the both sides of the outer ring of inner cone cylindrical roller bearing 5
Fixed by the endoporus step of the boss of the big back-up ring 3 being sleeved on the left part of top mandrel 1, bearing holder (housing, cover) 6 respectively, outside outer ring
Circle is placed in the hole of bearing holder (housing, cover) 6.
The middle part suit of top mandrel 1 can bear the cylindrical roller thrust bearing 10 of larger axial load, can bear compared with
Big axial load, the blowout patche of cylindrical roller thrust bearing 10 is fixed on the middle part of top mandrel 1, and seat ring is fixed on bearing holder (housing, cover) 6
Interior, the step axially through top mandrel 1 of cylindrical roller thrust bearing 10, the endoporus step of bearing holder (housing, cover) 6 are fixed, and thrust is short
The cylindrical of the seat ring of cylinder roller bearing 10 is placed in the hole of bearing holder (housing, cover) 6.
The angular contact ball bearing 12 of the adjustable axial gap of afterbody suit of top mandrel 1, angular contact ball bearing 12 it is interior
Circle back-up ring 13 is positioned, and back-up ring 13 adjusts pretension by the little jackscrew 15 in the centring ring 16 that is sleeved on top mandrel 1, to reach
To the radial clearance standard between the circular runout of top mandrel 1 and top mandrel 1 and angular contact ball bearing 12, use requirement is met；
The axial restraint centring ring 16 of collar 17 being mounted on top mandrel 1, the outer ring both sides of angular contact ball bearing 12 are respectively by using spiral shell
The 3 18 endoporus step positioning for being fixed on the outer back-up ring 14 of the right part of bearing holder (housing, cover) 6, bearing holder (housing, cover) 6 are followed closely, angular contact ball bearing 12 is two
Row.
Big back-up ring 3 is fixed on the left part of bearing holder (housing, cover) 6 with screw 1, and, built with sealing ring 4, sealing ring 4 can for big back-up ring 3
Prevent outside cutting fluid, impurity etc. from entering the service life that bearing is improved in bearing.
The orientational cone-shaped surface 19 at the middle part of bearing holder (housing, cover) 6 is felt relieved with the grinding machine headstock conical surface, and bearing holder (housing, cover) 6 is fixed on mill by screw 2 11
On bed head frame.
Top mandrel 1 of the present utility model adopts the quenched nitrogen treatment of steel alloy, to improve its wearability and toughness, while
Processed using precision grinder so as to which circular runout reaches 0.001-0.005mm.Bearing holder (housing, cover) 6 adopts steel alloy Carburization Treatment, grinding
Bearing processing press in processing, is processed using bearing special purpose grinder, by plain grinding-outer mill-interior mill-Ageing Treatment-put down
The multiple operation such as mill-outer mill-interior mill, it is ensured that the reusable positioning precision of bearing holder (housing, cover).Big back-up ring 3 adopts oxidation processes.
Claims (3)
1. a kind of precision movable center device, it is characterised in that：Top mandrel（1）The middle part conical surface equipped with adjustable radial clearance
Inner cone cylindrical roller bearing（5）, middle part is set with the cylindrical roller thrust bearing that can bear larger axial load（10）, tail
The angular contact ball bearing of the adjustable axial gap of portion's suit（12）.
2. precision movable center device according to claim 1, it is characterised in that：The top mandrel（1）Left end
Portion is in mating connection with roll centre hole；Top mandrel（1）Inner cone cylindrical roller bearing on the conical surface of middle part（5）Inner ring use
Locking nut（9）Positioning, locking nut（9）Interior jackscrew（7）And copper billet（8）For locking nut（9）It is locking, copper billet（8）Put
In top mandrel（1）With jackscrew（7）Between, inner cone cylindrical roller bearing（5）The both sides of outer ring are top by being sleeved on respectively
Mandrel（1）Big back-up ring on left part（3）Boss, bearing holder (housing, cover)（6）Endoporus step fix, the cylindrical of outer ring is placed in bearing holder (housing, cover)
（6）Hole in；Cylindrical roller thrust bearing（10）Blowout patche be fixed on top mandrel（1）Middle part, seat ring is fixed on bearing
Set（6）It is interior, cylindrical roller thrust bearing（10）Axially through top mandrel（1）Step, bearing holder (housing, cover)（6）Endoporus step
It is fixed, cylindrical roller thrust bearing（10）The cylindrical of seat ring is placed in bearing holder (housing, cover)（6）Hole in；Angular contact ball bearing（12）It is interior
Circle back-up ring（13）Positioning, back-up ring（13）By being sleeved on top mandrel（1）On centring ring（16）Interior little jackscrew（15）Adjust
Whole pretension, is mounted in top mandrel（1）On collar（17）Axial restraint centring ring（16）, angular contact ball bearing（12）Outer ring two
Side is respectively by with screw three（18）It is fixed on bearing holder (housing, cover)（6）The outer back-up ring of right part（14）, bearing holder (housing, cover)（6）Endoporus step determine
Position, angular contact ball bearing（12）For two row；Big back-up ring（3）With screw one（2）It is fixed on bearing holder (housing, cover)（6）Left part, big back-up ring
（3）Built with sealing ring（4）；Bearing holder (housing, cover)（6）Middle part orientational cone-shaped surface（19）With the centering of the grinding machine headstock conical surface, screw two（11）
By bearing holder (housing, cover)（6）It is fixed on the grinding machine headstock.
3. precision movable center device according to claim 1, it is characterised in that：The top mandrel（1）It is using conjunction
The quenched nitrogen treatment of Jin Gang, the top mandrel that circular runout is 0.001-0.005mm（1）；Bearing holder (housing, cover)（6）It is to be oozed using steel alloy
The bearing holder (housing, cover) of carbon process（6）；Big back-up ring（3）It is using the big back-up ring of oxidation processes（3）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621198797.1U CN206154012U (en) | 2016-11-07 | 2016-11-07 | Accurate movable center device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621198797.1U CN206154012U (en) | 2016-11-07 | 2016-11-07 | Accurate movable center device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206154012U true CN206154012U (en) | 2017-05-10 |
Family
ID=58656810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621198797.1U Active CN206154012U (en) | 2016-11-07 | 2016-11-07 | Accurate movable center device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206154012U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107511725A (en) * | 2016-11-07 | 2017-12-26 | 襄阳博亚精工装备股份有限公司 | Precision movable center device |
| CN114905348A (en) * | 2022-04-11 | 2022-08-16 | 威海红宇数控机床有限公司 | Rolling friction female center |
| CN116512019A (en) * | 2023-06-26 | 2023-08-01 | 华辰精密装备（昆山）股份有限公司 | High-precision tailstock center structure and roll grinder |
-
2016
- 2016-11-07 CN CN201621198797.1U patent/CN206154012U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107511725A (en) * | 2016-11-07 | 2017-12-26 | 襄阳博亚精工装备股份有限公司 | Precision movable center device |
| CN107511725B (en) * | 2016-11-07 | 2024-03-26 | 襄阳博亚精工装备股份有限公司 | Precise movable center device |
| CN114905348A (en) * | 2022-04-11 | 2022-08-16 | 威海红宇数控机床有限公司 | Rolling friction female center |
| CN114905348B (en) * | 2022-04-11 | 2024-04-12 | 威海红宇数控机床有限公司 | Rolling friction female center |
| CN116512019A (en) * | 2023-06-26 | 2023-08-01 | 华辰精密装备（昆山）股份有限公司 | High-precision tailstock center structure and roll grinder |
| CN116512019B (en) * | 2023-06-26 | 2023-09-26 | 华辰精密装备（昆山）股份有限公司 | High-precision tailstock center structure and roll grinder |
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