CN204725144U - Large-scale high rigidity numerical control static pressure rotary worktable - Google Patents
Large-scale high rigidity numerical control static pressure rotary worktable Download PDFInfo
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- CN204725144U CN204725144U CN201520308665.9U CN201520308665U CN204725144U CN 204725144 U CN204725144 U CN 204725144U CN 201520308665 U CN201520308665 U CN 201520308665U CN 204725144 U CN204725144 U CN 204725144U
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Abstract
The utility model provides a kind of large-scale high rigidity numerical control static pressure rotary worktable, comprise round table surface, base, step gland, SMD grating scale and torque motor, round table surface operates in high rigidity that carrying hydrostatic slideway etc. forms, high accuracy, anti abrasive dual-gripper hydrostatic bearing structure, directly driven by high thrust liquid-cooled slotless torque motor, working table movement position is controlled by SMD grating scale feedback closed loop, base with two enclose the land foot bolt support, be connected with ground.The utility model, under the prerequisite fully ensureing stage accuracy, simplifies structure, optimizes load transfer path, realizes large-scale workpiece high rigid support.
Description
Technical field
The utility model belongs to Digit Control Machine Tool field, is specifically related to a kind of large-scale high rigidity numerical control static pressure rotary worktable.
Background technology
Along with the fast development of the heavy industry industries such as marine settings, boats and ships, wind-powered electricity generation, nuclear power, metallurgy, mine, day by day vigorous to the demand of large-scale precision lathe.Large-sized numerical control rotary table is the critical component of large-scale precision lathe, and by the introducing of direct drive of torque motor technology, static pressure technology, the precision of workbench has had and significantly rises.But the problem that in use still existence one is more sharp-pointed, i.e. the Rigidity of workbench, when processing large-size workpiece, diameter of work is much larger than turntable diameter, and workpiece weight reaches tens of ton.Trade union college aftertable in place easily deforms, and has a strong impact on machining accuracy, improves huge revolving table rigidity to guarantee that precision stability is current problem demanding prompt solution.
Utility model content
The purpose of this utility model is to provide a kind of large-scale high rigidity numerical control static pressure rotary worktable.
For achieving the above object, the utility model have employed following technical scheme:
This rotary table comprises round table surface, base, step gland and torque motor, the external cylindrical surface of described round table surface lower end is arranged in the circular hole of base upper end, the wall of described circular hole offers multiple centering oil pocket along described wall even circumferential distribution, the upper surface of described base is provided with carrying hydrostatic slideway, round table surface is supported on base by described carrying hydrostatic slideway, the stator-sectional of torque motor is arranged on the upper surface of base, the rotor segment of torque motor is arranged on the lower surface of round table surface, round table surface offers endoporus, the lower end of step gland is connected with the upper surface of base, the upper end of step gland is pressed in bottom described endoporus in projecting inward part.
Described rotary table also comprises SMD grating scale, and SMD grating scale is arranged on the wall of described endoporus, and the read head of SMD grating scale was arranged on scale, crosses scale and is arranged on step gland.
Be provided with in described step gland for hydraulic oil being delivered to step gland and described step gland oil circuit between projecting inward part.
Described carrying hydrostatic slideway is two, and carrying hydrostatic slideway adopts glue injection guide rail, and torque motor is arranged between two carrying hydrostatic slideways.
Described base bottom adopts two foot bolts of enclosing the land to support, and two installation sites of enclosing the land foot bolt are distinguished corresponding with two carrying hydrostatic slideways.
Described torque motor adopts the split type torque motor of liquid-cooled slotless.
The upper surface of described round table surface offers multiple T-slot for installing work piece holder, and described T-slot does not open the upper surface of wearing round table surface.
Described rotary table is drum organization.
Described rotary table center is hollow-core construction, and described hollow-core construction is made up of the endoporus of round table surface, step gland and the endoporus be opened on base.
The beneficial effects of the utility model are embodied in:
Rotary table described in the utility model utilizes carrying hydrostatic slideway, centering oil pocket and step gland etc. form hydrostatic bearing formula supporting structure, simplifies the structure of rotary table, achieves large-scale workpiece height non-yielding prop.
Further, round table surface described in the utility model is equivalent to operate on high rigidity, high accuracy, anti abrasive hydrostatic bearing, and directly driven by high thrust liquid-cooled slotless torque motor, rotary table movement position is controlled by SMD grating scale feedback closed loop, base with two enclose the land foot bolt support, make the bang path of load obtain optimization, achieve the rigid of transmission of power, reduce distortion, ensure that rotary table precision.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is top view of the present utility model;
Wherein, round table surface 1, torque motor 2, base 3, SMD grating scale 4, step gland 5, centering oil pocket 6, step gland oil circuit 7, return line 8, outer ring carrying hydrostatic slideway 9, inner ring carry hydrostatic slideway 10, cross scale 11, anchor bolt installation hole 12, cover plate 13, T-slot 14.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is elaborated.
See Fig. 1, large-scale high rigidity numerical control static pressure rotary worktable described in the utility model comprises round table surface 1, base 3, step gland 5, SMD grating scale 4 and torque motor 2, the external cylindrical surface of described round table surface 1 lower end is arranged in the circular hole of base 3 upper end, the wall of described circular hole offers multiple centering oil pocket 6 along described wall even circumferential distribution, the upper surface of described base 3 is provided with carrying hydrostatic slideway, described carrying hydrostatic slideway is two, carrying hydrostatic slideway adopts glue injection guide rail, torque motor 2 is arranged between two carrying hydrostatic slideways, round table surface 1 is supported on base 3 by described carrying hydrostatic slideway, the stator-sectional of torque motor 2 is arranged on the upper surface of base 3, the rotor segment of torque motor 2 is arranged on the lower surface of round table surface 1, described torque motor 2 adopts the split type torque motor of high thrust liquid-cooled slotless, rotary table is directly driven by this torque motor, round table surface 1 offers endoporus, the lower end of step gland 5 is connected with the upper surface of base 3, the upper end of step gland 5 is pressed in bottom described endoporus in projecting inward part.Be provided with for hydraulic oil being delivered to step gland 5 and described step gland oil circuit 7 between projecting inward part in described step gland 5, rotary table movement position is controlled by SMD grating scale feedback closed loop, SMD grating scale 4 is arranged on the wall of described endoporus, the read head of SMD grating scale 4 was arranged on scale 11, crossing scale 11 is arranged on step gland 5, described rotary table is drum organization, adopt two foot bolts of enclosing the land to support bottom base 3, two installation sites of enclosing the land foot bolt are distinguished corresponding with two carrying hydrostatic slideways.
See Fig. 2, the upper surface of described round table surface 1 offers multiple T-slot 14 (being evenly arranged) for installing work piece holder, described T-slot 14 does not open the upper surface of wearing round table surface, described rotary table center is hollow-core construction, described hollow-core construction is communicated with by the endoporus of round table surface 1, step gland 5 and the endoporus offered on the base 3 and forms, and the upper surface of the endoporus of round table surface is provided with cover plate 13.Process comparatively machining long workpieces time, open cover plate, hollow-core construction is for holding the undressed part compared with machining long workpieces.
Operation principle of the present utility model is:
First, before driving round table surface 1 to rotate, injection liquid force feed in carrying hydrostatic slideway, step gland oil circuit 7 and centering oil pocket 6, the hydraulic oil in centering oil pocket 6 enters between the wall of described external cylindrical surface and base 3 upper end circular hole, realize to round table surface 1 and on the centering support of workpiece; Hydraulic oil in step gland oil circuit 7 provides the downward pressure to round table surface 1, and coordinates with the power upwards holding up round table surface 1 that provides of carrying hydrostatic slideway place, realize to round table surface 1 and on the antidumping support of workpiece.Then, the split type torque motor of high thrust liquid-cooled slotless is utilized to drive round table surface revolution.
Embodiment
As shown in Figure 1, the high rigidity numerical control static pressure rotary worktable of a kind of large-scale gear grinding machines, comprises round table surface 1, base 3, step gland 5, SMD grating scale 4 and torque motor 2.Round table surface 1 two circle carrying hydrostatic slideways support on the base 3, and step gland 5 is installed on the base 3, forms antidumping static-pressure guide rail structure with round table surface 1.The uniform 8 groups of oil pockets of base 3 circular hole wall, round table surface 1 lower end external cylindrical surface puts into base 3 circular hole, keeps with one heart, forms centering guide rail structure.Torque motor 2 stator-sectional is arranged on base upper surface, and rotor segment is arranged on round table surface 1 lower surface.SMD grating scale 4 is arranged on round table surface 1 inner hole wall, rotates with round table surface 1, and read head is arranged on step gland 5, keeps transfixion.Base 3 with two enclose the land foot bolt support, be connected with ground.Workbench entirety is drum organization, and ensure rational height diameter ratio, compare traditional flat structure, the rigidity of structure is better.Base adopts two foot bolts of enclosing the land to support, and foundation bolt is positioned at below carrying hydrostatic slideway, avoids producing bending moment of torsion in load transfer process, improves non-deformability.Base adopts spheroidal graphite cast-iron casting to replace traditional casting pig, and support strength is higher.Carrying hydrostatic slideway adopts two circles, and loaded area is large, supports more steady, and in conjunction with the effect of step gland, the round table surface occurred when avoiding carrying large-diameter workpiece is toppled distortion.Centering oil pocket is positioned at base circular hole wall, and centering oil pocket diameter is compared traditional table top main shaft centering oil pocket and expanded several times, and radial bearing capacity is higher.
As shown in Figure 2, round table surface adopts monolithic construction, and table top T-slot extends along round table surface upper surface radial direction and do not open wears, and improves round table surface surface rigidity, avoids producing distortion during Workpiece clamping.
Carrying hydrostatic slideway adopts glue injection guide rail, improves hydrostatic slideway processing adjusting process.Torque motor adopts the split type torque motor of liquid-cooled slotless.
This work table rotation diameter 2.5 meters, load-bearing 50 tons, rotating speed 0 ~ 60rpm, radial rigidity reaches 15KN/ μm, and axial rigidity reaches 60KN/ μm, and positioning precision reaches 1.5 〞, and repetitive positioning accuracy reaches 1 〞.
Claims (8)
1. one kind large-scale high rigidity numerical control static pressure rotary worktable, it is characterized in that: this rotary table comprises round table surface (1), base (3), step gland (5) and torque motor (2), the external cylindrical surface of described round table surface (1) lower end is arranged in the circular hole of base (3) upper end, the wall of described circular hole offers multiple centering oil pocket (6) along described wall even circumferential distribution, the upper surface of described base (3) is provided with carrying hydrostatic slideway, round table surface (1) is supported on base (3) by described carrying hydrostatic slideway, the stator-sectional of torque motor (2) is arranged on the upper surface of base (3), the rotor segment of torque motor (2) is arranged on the lower surface of round table surface (1), (1) offers endoporus to round table surface, the lower end of step gland (5) is connected with the upper surface of base (3), the upper end of step gland (5) is pressed in bottom described endoporus in projecting inward part.
2. a kind of large-scale high rigidity numerical control static pressure rotary worktable according to claim 1, it is characterized in that: described rotary table also comprises SMD grating scale (4), SMD grating scale (4) is arranged on the wall of described endoporus, the read head of SMD grating scale (4) was arranged on scale (11), crossed scale (11) and was arranged on step gland (5).
3. a kind of large-scale high rigidity numerical control static pressure rotary worktable according to claim 1, is characterized in that: be provided with in described step gland (5) for hydraulic oil being delivered to step gland (5) and described step gland oil circuit (7) between projecting inward part.
4. a kind of large-scale high rigidity numerical control static pressure rotary worktable according to claim 1, it is characterized in that: described carrying hydrostatic slideway is two, carrying hydrostatic slideway adopts glue injection guide rail, and torque motor (2) is arranged between two carrying hydrostatic slideways.
5. a kind of large-scale high rigidity numerical control static pressure rotary worktable according to claim 4, is characterized in that: described base (3) bottom adopts two foot bolts of enclosing the land to support, and two installation sites of enclosing the land foot bolt are distinguished corresponding with two carrying hydrostatic slideways.
6. a kind of large-scale high rigidity numerical control static pressure rotary worktable according to claim 1, is characterized in that: described torque motor (2) adopts the split type torque motor of liquid-cooled slotless.
7. a kind of large-scale high rigidity numerical control static pressure rotary worktable according to claim 1, it is characterized in that: the upper surface of described round table surface (1) offers multiple T-slot (14) for installing work piece holder, and described T-slot (14) does not open the upper surface of wearing round table surface.
8. a kind of large-scale high rigidity numerical control static pressure rotary worktable according to claim 1, it is characterized in that: described rotary table center is hollow-core construction, described hollow-core construction is made up of the endoporus of round table surface (1), step gland (5) and the endoporus be opened on base (3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520308665.9U CN204725144U (en) | 2015-05-13 | 2015-05-13 | Large-scale high rigidity numerical control static pressure rotary worktable |
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| CN201520308665.9U CN204725144U (en) | 2015-05-13 | 2015-05-13 | Large-scale high rigidity numerical control static pressure rotary worktable |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105345491A (en) * | 2015-12-24 | 2016-02-24 | 浙江博雷重型机床制造有限公司 | Rotary working table |
| CN105382558A (en) * | 2015-12-24 | 2016-03-09 | 浙江博雷重型机床制造有限公司 | Integrated high-accuracy servo revolving platform |
| CN105414996A (en) * | 2015-12-24 | 2016-03-23 | 浙江博雷重型机床制造有限公司 | Vertical lathe |
| CN109434490A (en) * | 2017-09-01 | 2019-03-08 | 发那科株式会社 | The control method of rotary table device and rotary table device |
-
2015
- 2015-05-13 CN CN201520308665.9U patent/CN204725144U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105345491A (en) * | 2015-12-24 | 2016-02-24 | 浙江博雷重型机床制造有限公司 | Rotary working table |
| CN105382558A (en) * | 2015-12-24 | 2016-03-09 | 浙江博雷重型机床制造有限公司 | Integrated high-accuracy servo revolving platform |
| CN105414996A (en) * | 2015-12-24 | 2016-03-23 | 浙江博雷重型机床制造有限公司 | Vertical lathe |
| CN109434490A (en) * | 2017-09-01 | 2019-03-08 | 发那科株式会社 | The control method of rotary table device and rotary table device |
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