CN211565477U

CN211565477U - Rotary table for numerical control vertical composite grinding machine

Info

Publication number: CN211565477U
Application number: CN201922454445.8U
Authority: CN
Inventors: 王家富; 吴琼; 孙涛
Original assignee: Shanghai Oubo Automatic Control Technology Equipment Co ltd
Current assignee: Shanghai Oubo Automatic Control Technology Equipment Co ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-09-25
Anticipated expiration: 2029-12-30

Abstract

The utility model relates to a rotary worktable for vertical compound grinding machine of numerical control, the workstation is installed on the roating seat, the roating seat passes through ultra-precision revolving stage bearing group to be installed on revolving stage bearing axle mount pad, revolving stage bearing mount pad fixed connection is on the lathe bed of lathe, roating seat fixed connection drive shaft, the drive shaft passes through the drive shaft sleeve and installs in the lathe bed of lathe, and support by two upper and lower angular contact bearings, be furnished with in the bearing between two angular contact bearings, outer spacer ring, and through lock nut with angular contact bearing and drive shaft connection, the synchronous pulley of drive is installed to the drive shaft lower extreme. The utility model discloses compare with current revolving stage for vertical grinder, compact structure, bearing capacity are big, the precision is high, and the rigidity is higher than static pressure rotary worktable, long service life to need not dispose oil supply unit in the use, use and maintenance cost are low.

Description

Rotary table for numerical control vertical composite grinding machine

Technical Field

The utility model relates to a grinding machine workstation especially relates to a rotary worktable for vertical compound grinding machine of numerical control.

Background

The rotary worktable device of the traditional vertical grinding machine generally comprises a workpiece main shaft, a sleeve, a worktable lower seat, a worktable, a belt and other parts. The upper end of a workpiece main shaft adopts a double-row cylindrical roller bearing, the lower end of the main shaft is provided with a tapered roller bearing and a spring for pre-tightening the bearing, the periphery of the workpiece main shaft is provided with a plane thrust ball bearing, and a sleeve and the workpiece main shaft are combined and fixed below a lower seat of a workbench and then fixed on a lathe bed together. The lower end of the workpiece spindle is provided with a belt pulley, and the tension force of the belt applies overturning moment to the rotary table, so that when the working table rotates, the bearing is easy to wear, and the whole rotary working table is small in bearing capacity, low in precision and short in service life. In addition, the operation of adjusting the pre-tightening force of the spring at the rear end of the workpiece spindle is complicated, the quality controllability of the high-precision spring is poor, and the machining precision is affected by the damage of the radial relay of the belt to the precision of the bearing.

The patent discloses a static pressure rotary table, which adopts a static pressure bearing technology and comprises a static pressure main shaft, a static pressure bearing seat, a static pressure bearing seat, a lower pull plate, an oil receiving disc, an outer sleeve and the like, wherein the upper end of the static pressure main shaft is fixedly connected with the rotary table, the static pressure bearing seat is arranged below the rotary table, the static pressure main shaft is rotatably supported in the static pressure bearing seat through the static pressure bearing, the static pressure main shaft is provided with the lower pull plate corresponding to the lower part of the static pressure bearing seat, the lower pull plate is fixedly connected with the static pressure main shaft, the oil receiving disc is sleeved on the static pressure main shaft, the lower pull plate is arranged in an installation cavity of the oil receiving disc, the upper end surface of an outer ring of the oil receiving disc extends to the step surface of the. The static pressure type rotary worktable has stable work, strong bearing capacity, high rotation precision and long service life, but the structure of the static pressure type rotary worktable is complex, the design, processing and assembly difficulty of a static pressure main shaft and a static pressure shaft is high, the processing and assembly precision of a static pressure bearing directly influences the rotation precision of the worktable, so that the precision consistency of the vertical grinding machines produced in batches by using the static pressure type rotary worktable is poor, and the static pressure type rotary worktable needs to be provided with an independent oil supply device, so the manufacturing cost and the use cost of the static pressure type rotary worktable are high. Particularly, under the conditions of low bearing and high precision, the advantages of the static pressure workbench cannot be exerted.

Disclosure of Invention

To above problem, the utility model provides a rotary worktable for vertical compound grinding machine of numerical control, its bearing capacity is greater than 1 ton, and the precision is high, and the rigidity is higher than static pressure rotary worktable, long service life, simple structure, and the manufacturing and the assembly degree of difficulty are low, and the batch precision uniformity of lathe is high to need not dispose oil supply unit in the use, use and maintenance cost are low.

In order to achieve the above purpose, the technical scheme of the utility model is that: the utility model provides a rotary table for vertical compound grinding machine of numerical control, includes workstation, revolving bed, ultra-precision revolving stage bearing group, revolving stage bearing mount pad, driving shaft sleeve, drive shaft, angular contact bearing, the outer space ring of interior space ring of bearing, outer bearing, the workstation is installed on the revolving bed, the revolving bed passes through ultra-precision revolving stage bearing group to be installed on revolving stage bearing shaft mount pad, revolving stage bearing mount pad fixed connection is on the lathe bed of lathe, revolving bed fixed connection drive shaft, the drive shaft passes through the driving shaft sleeve to install in the lathe bed of lathe to by two upper and lower angular contact bearing supports, be furnished with the interior, outer space ring of bearing between two angular contact bearing to through lock nut with angular contact bearing and drive shaft connection, drive synchronous pulley is installed to the drive shaft lower extreme.

Furthermore, the driving shaft is connected with the rotary seat through a detachable elastic coupling.

Furthermore, an air sealing structure is additionally arranged between the rotary seat and the rotary table bearing mounting seat and used for preventing external impurities from entering a bearing operation area and prolonging the service life of the ultra-precise rotary table bearing set.

Furthermore, the inner and outer spacing rings of the bearing can pre-tighten the two angular contact bearings through the matching grinding height, so that the rotation precision and the rigidity of the driving shaft are improved.

Further, the driving synchronous belt wheel is connected with the driving shaft through a high-rigidity expansion sleeve.

The utility model has the advantages that: the utility model discloses compare with current revolving stage for vertical grinder, the utility model discloses compact structure, its bearing capacity is greater than 1 ton, the precision is high, the rigidity is higher than static pressure rotary worktable, long service life, moreover, the steam generator is simple in structure, it is low with the assembly degree of difficulty to make, the batch precision uniformity of lathe is high, and need not dispose oil supply unit in the use, use and maintenance cost are low, the lower synchronous belt drive mode of use cost can be used in the drive of workstation, and drive power does not influence the gyration precision of workstation, specially adapted batch manufacturing's gyration diameter is less than 1 meter's vertical compound grinding machine of numerical control.

Drawings

Fig. 1 is a schematic structural view of a rotary table for a numerical control vertical compound grinding machine of the present invention.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings and examples.

As shown in fig. 1, the utility model discloses a rotary table for vertical compound grinding machine of numerical control, including workstation 1, roating seat 27, ultra-precision revolving stage bearing group 26, revolving stage bearing mount 9, protection casing 8, driving shaft sleeve 14, drive shaft 13, upper and lower angle contact bearing 11, 15, bearing inner space circle 21, outer bearing outer space circle 22, first to

fourth end cover

4, 5, 10, 20, lock nut 17, drive synchronous pulley 19, parts such as removable fraction elastic coupling 28. The worktable 1 is arranged on a rotary seat 27 and is fixed by a screw and a gasket 7, the rotary seat 27 is supported by an ultra-precise rotary table bearing group 26 and is connected with a rotary part of the ultra-precise rotary table bearing group 26 by a screw 25, the ultra-precise rotary table bearing group 26 is arranged on a rotary table bearing shaft mounting seat 9, an inner fixed part of the ultra-precise rotary table bearing group 26 is connected with the rotary table bearing mounting seat 9 by a screw 24, a mounting process hole is reserved at the corresponding position of the rotary seat 27 and is sealed by an oil plug 2, the rotary table bearing mounting seat 9 is arranged on a lathe bed 12 of a machine tool, a protective cover 8 is arranged below the worktable 1, the axial support and the radial support of the worktable 1 are both supported by the integrated ultra-precise rotary table bearing group 26, the rotary precision is high, the installation is convenient, the capability of resisting the overturning moment of a table surface is strong, a hermetic seal is added between the rotary seat 27 and the rotary table, the service life of the ultra-precise turntable bearing set 26 is prolonged; a driving shaft sleeve 14 is arranged in a lathe bed 12 of a machine tool, a driving shaft 13 is arranged in the driving shaft sleeve 14 and is supported by an upper angular contact bearing 11 and a lower angular contact bearing 15, a bearing inner spacing ring 21 and an outer bearing outer spacing ring 22 are arranged in front of the upper angular contact bearing 11 and the lower angular contact bearing 15, the upper angular contact bearing 11 and the lower angular contact bearing 15 are connected with the driving shaft 13 through a locking nut 17, the upper angular contact bearing 11 and the lower angular contact bearing 15 can be pre-tightened by matching the heights of the bearing inner spacing ring 21 and the outer bearing outer spacing ring 22, the rotation precision and the rigidity of the driving shaft 13 are improved, a driving synchronous belt wheel 19 is arranged at the lower end of the driving shaft 13, and the driving synchronous belt wheel 19 is connected with the driving shaft 13 through a; the driving shaft 13 is connected with the rotary base 27 through the detachable elastic coupling 28, so that the tension force of the driving belt cannot be transmitted to the workbench 1, and the driving force does not influence the rotation precision of the workbench 1.

In this embodiment: the axial support and the radial support of the workbench 1 are both supported by the integrated ultra-precise turntable bearing group 26, the rotation precision is high, the installation is convenient, and the capability of resisting the overturning moment of the table top is strong.

In this embodiment: an air sealing structure is added between the rotary seat 27 and the rotary table bearing mounting seat 9, so that external impurities cannot enter a bearing operation area, and the service life of the ultra-precise rotary table bearing set 26 can be prolonged.

In this embodiment: the upper and lower

corner contact bearings

11 and 15 can be pre-tightened by grinding the heights of the inner bearing spacer 21 and the outer bearing spacer 22, so that the rotation precision and the rigidity of the driving shaft 13 are improved.

In this embodiment: the driving synchronous pulley 19 is connected with the driving shaft 13 through the high-rigidity expansion sleeve 18, and has high concentricity and enough rigidity.

In this embodiment: the driving shaft 13 is connected with the rotary base 27 through the detachable elastic coupling 28, so that the tension force of the driving belt cannot be transmitted to the workbench 1, and the driving force does not influence the rotation precision of the workbench 1.

Claims

1. The utility model provides a rotary worktable for vertical compound grinding machine of numerical control, includes workstation, roating seat, ultra-precision revolving stage bearing group, revolving stage bearing mount pad, driving shaft sleeve, drive shaft, angular contact bearing, the outer space ring of interior space ring of bearing, outer bearing, its characterized in that: the utility model discloses a lathe, including workstation, revolving seat, drive shaft sleeve, revolving seat and drive shaft sleeve, the workstation is installed on the revolving seat, the revolving seat passes through ultra-precision revolving seat bearing group and installs on revolving seat bearing axle mount pad, revolving seat bearing mount pad fixed connection is on the lathe bed of lathe, the drive shaft passes through the drive shaft sleeve and installs in the lathe bed of lathe to by two upper and lower angular contact bearing supports, be furnished with the bearing between two angular contact bearing inside and outside spacer ring to through.

2. The rotary table for a numerically controlled vertical compound grinding machine according to claim 1, characterized in that: the driving shaft is connected with the rotary seat through a detachable elastic coupling.

3. The rotary table for a numerically controlled vertical compound grinding machine according to claim 1, characterized in that: and an air sealing structure is additionally arranged between the rotary seat and the rotary table bearing mounting seat and is used for preventing external impurities from entering a bearing operation area and prolonging the service life of the ultra-precise rotary table bearing set.

4. The rotary table for a numerically controlled vertical compound grinding machine according to claim 1, characterized in that: the inner and outer space rings of the bearing can pre-tighten the two angular contact bearings through the matching grinding height, so that the rotation precision and the rigidity of the driving shaft are improved.

5. The rotary table for a numerically controlled vertical compound grinding machine according to claim 1, characterized in that: the driving synchronous belt wheel is connected with the driving shaft through a high-rigidity expansion sleeve.