CN203679302U

CN203679302U - Movable centre used for machining thin-walled workpieces

Info

Publication number: CN203679302U
Application number: CN201420004217.5U
Authority: CN
Inventors: 陈灵强; 王卫刚; 李岭; 罗震; 张力; 刘春伟
Original assignee: Baoji Oilfield Machinery Co Ltd
Current assignee: Baoji Oilfield Machinery Co Ltd
Priority date: 2014-01-03
Filing date: 2014-01-03
Publication date: 2014-07-02
Anticipated expiration: 2024-01-03

Abstract

The utility model discloses a movable centre used for machining thin-walled workpieces. The movable centre comprises a shell, wherein a centre shaft is sleeved with an axis cavity in the rear half part of the shell, the two sides of a protrusive shoulder at the front end of the centre shaft are connected with an inner circle of the cavity in the shell through single-row radial roller bearings and single-row thrust roller bearings in a supporting and sleeved mode, and the centre shaft is further connected with an inner circle of the rear end of the shell through a choke plug in a supporting and sleeved mode; the surface of an outer circle of the rear end of the shell is connected with the surface of an inner circle of a groove in the front end of a centre head in a supporting and sleeved mode, and the centre shaft is connected with a conical axis hole in a sleeved mode. The movable centre achieves batch machining of the high-hardness thin-walled workpieces on a common centre lathe and achieves machining of the outer circle surfaces of the thin-walled workpieces high in size, form and location tolerance and surface accuracy requirements, through optimizing the structure, the workpieces of the type are easy and rapid to clamp and align, and the manufacturing process meets HSE requirements better.

Description

A kind of thin-wall part processing live center

Technical field

The utility model belongs to mechanical equipment technical field, relates to a kind of thin-wall part processing live center.

Background technology

F series slurry pump is that cylinder sleeve is one of critical component of slush pump.Cylinder sleeve belongs to thin-walled parts, there is high rigidity, size, form and position tolerance and surface accuracy require high and many specifications, brought many difficult problems to its production and processing, manufacturing procedure many and to process equipment require high, simultaneously because this heavy parts belongs to production in enormous quantities, station conversion is many, equipment needed thereby is many, and operation volume of the circular flow is large, and processing cost cannot effectively be reduced.

Utility model content

The purpose of this utility model is to provide a kind of thin-wall part processing live center, has solved prior art middle-end thin-walled parts and has been difficult to processing, and station conversion is many, and equipment needed thereby is many, and operation volume of the circular flow is large, the problem that cost of manufacture is high.

The technical scheme that the utility model adopts is, a kind of thin-wall part processing live center, comprise housing, in the axle center cavity of housing latter half, be set with tail spindle, the front end convex shoulder both sides of tail spindle are respectively by single-row centripetal roller bearing and single-row thrust roller bearing and housing cavity inner circle support socket, and tail spindle is in addition by silently supporting and be socketed with housing rear end inner circle; Housing rear end outer round surface and centre head front end groove internal circular surfaces support socket, and the taper axle center borehole jack of tail spindle and centre head connects.

Thin-wall part processing live center of the present utility model, its feature is also:

Housing adopts hollow structure, and the front end outer round surface tapering of housing adopts No. 5 tapering shapes of Mohs.

Between tail spindle and centre head, adopt 1:10 taper fit to be connected.

Silently, be provided with a locking slot radially, locking slot is provided with axial locking hole, and clamping screw is installed in locking hole.

The beneficial effects of the utility model are to have realized the transformation of two kinds of processing modes, 1) can on engine lathe, realize high rigidity, size, form and position tolerance and surface accuracy require high thin-wall part processing.2) use this live center clamping centering fast and easy, can realize the batch machining of thin-wall part.The change of above two kinds of modes, greatly realize operation merging, the few clamping workpiece centering of letter and the number of turnover, effectively ensure the workpiece accuracy of form and position and dimension precision requirement, ensureing under the prerequisite of workmanship, greatly improve working (machining) efficiency, the production cost having reduced largely, and improved the handling capacity of critical process.3) adopt the mode of taper fit to transmit torque, adopt and silently match with housing and centre head, have lightweight, simple in structure, clamping workpiece convenient, improved greatly security, the reliability of operation.

Brief description of the drawings

Fig. 1 is the structural representation of the utility model device;

Fig. 2 is the shell structure figure in the utility model device;

Fig. 3 is the centre head structure chart in the utility model device;

Fig. 4 is the silently structure chart in the utility model device.

In figure, 1. housing, 2. silently, 3. tail spindle, 4. centre head, 5. single-row centripetal roller bearing, 6. single-row thrust roller bearing, 7. lock-screw, 8. fabrication hole, 9. locking hole, 10. locking slot.

Detailed description of the invention

Below in conjunction with the drawings and specific embodiments, the utility model is elaborated.

With reference to Fig. 1, structure of the present utility model is, comprise housing 1, in the axle center cavity of housing 1 latter half, be set with tail spindle 3, the front end convex shoulder both sides of tail spindle 3 are supported socket by single-row centripetal roller bearing 5 and single-row thrust roller bearing 6 with housing 1 cavity inner circle respectively, and tail spindle 3 is in addition by silently 2 supporting socket with housing 1 rear end inner circle; Housing 1 rear end outer round surface and centre head 4 front end groove internal circular surfaces support socket, and tail spindle 3 connects with the taper axle center borehole jack of centre head 4.

Single-row centripetal roller bearing 5 and single-row thrust roller bearing 6 are all single-row centripetal bearings.

With reference to Fig. 2, the front end outer round surface tapering of housing 1 adopts No. 5 tapering shapes of Mohs, makes to be connected by Morse's taper between live center and the tailstock of lathe, makes easy for installation quick.Housing 1 adopts hollow structure, has reduced the weight of housing 1, makes the Weight control of whole live center in 10Kg, improves the security of operator's mounting or dismounting;

With reference to Fig. 3, the axle center hole of centre head 4 adopts 1:10 tapering, adopts 1:10 taper fit to be connected transmission torque between tail spindle 3 and centre head 4, thereby it is tightr to realize the axial location of live center.

With reference to Fig. 4, be silently drilled with on 2 four axial fabrication holes 8 be exactly for easy accessibility bore fabrication hole, fabrication hole 8 is exactly screwed hole, with facilitate silently 2 with the dismounting of housing 1.Silently be provided with a locking slot 10 radially on 2, locking slot 10 is provided with axial locking hole 9, and clamping screw 7 is installed in locking hole 9, for by itself and housing 1 and locked its axial float that prevents of tail spindle 3.

On tail spindle 3, be provided with three oil grooves, make to form oil pocket between and two rolling bearings inner at housing 1, reach the effect of lubricated two rolling bearings.On housing 1, correspondence is provided with screw hole (opening size M8), adopts nut to be sealed when top every day use, need to give rolling bearing lubrication time, injects lubricating oil by this place.

The utility model thin-wall part processing live center, realize the batch machining of high rigidity thin-wall part on engine lathe, meet the processing of the thin-wall part outer round surface of the high request of size, form and position tolerance and surface accuracy, and by the optimization to structure, make the type clamping workpiece centering simple and quick, make manufacture process more meet HSE requirement.

Claims

1. a thin-wall part processing live center, its feature is: comprise housing (1), in the axle center cavity of housing (1) latter half, be set with tail spindle (3), the front end convex shoulder both sides of tail spindle (3) are respectively by single-row centripetal roller bearing (5) and single-row thrust roller bearing (6) and housing (1) cavity inner circle support socket, and tail spindle (3) is in addition by silently (2) and housing (1) rear end inner circle support socket; Housing (1) rear end outer round surface and centre head (4) front end groove internal circular surfaces support socket, and tail spindle (3) connects with the taper axle center borehole jack of centre head (4).

2. thin-wall part processing live center according to claim 1, its feature is: described housing (1) adopts hollow structure, the front end outer round surface tapering of housing (1) adopts No. 5 tapering shapes of Mohs.

3. thin-wall part processing live center according to claim 1, its feature is: between described tail spindle (3) and centre head (4), adopt 1:10 taper fit to be connected.

4. thin-wall part processing live center according to claim 1, its feature is: on described silently (2), be provided with a locking slot (10) radially, locking slot (10) is provided with axial locking hole (9), and clamping screw (7) is installed in locking hole (9).