CN101618517B - Feeding system consisting of multi-drive elements - Google Patents
Feeding system consisting of multi-drive elements Download PDFInfo
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- CN101618517B CN101618517B CN2009101821404A CN200910182140A CN101618517B CN 101618517 B CN101618517 B CN 101618517B CN 2009101821404 A CN2009101821404 A CN 2009101821404A CN 200910182140 A CN200910182140 A CN 200910182140A CN 101618517 B CN101618517 B CN 101618517B
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- 230000005484 gravity Effects 0.000 claims abstract description 41
- 239000011159 matrix material Substances 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 230000001133 acceleration Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 9
- 230000002146 bilateral effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 241000826860 Trapezium Species 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010358 mechanical oscillation Effects 0.000 description 1
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Abstract
The invention discloses a feeding system consisting of multi-drive elements, which comprises a worktable. The worktable is connected with a basal body by tracks; dual-drive elements are respectively arranged at both sides of the upper part of the worktable; and additional drive elements are arranged at the lower part of the worktable. The structure of the feeding system of the invention realizes: when the gravity center position of the worktable randomly changes in a plane which is perpendicular to the direction of a drive force, the moments of corresponding gravity center formed by the drive force and an external force are both compensated, and thus, the mechanical vibration of the feeding system is farthest inhibited; the acceleration of the feeding system can be increased; and the surface quality of workpiece processing can be enhanced.
Description
Technical field:
The present invention relates to a kind of feed system frame for movement design field, particularly arrange and platform version about the feeding platform driver element (driving force output systems such as servomotor+ball-screw or linear electric motors) in Digit Control Machine Tool field.
Background technology:
In the Digit Control Machine Tool field, the feed system of carrying workpiece, main shaft and turntable etc. is used widely, and the indexs such as acceleration, feed speed and precision to feed system in the numerical control machining center of high-speed, high precision are had higher requirement.Tradition single servo motor+ball-screw or linear electric motors directly drive feed system (is example with the ball-screw).Because of machine tool element is arranged in the middle of the workbench, or consider factor such as platform structure rigidity, can not allow driver element directly by its center of gravity W., have to make moving component produce the trend of reversing especially under in high cutting speed than the roughing feed velocity conditions.Above-mentioned inevitable twist motion and because the effect of inertia that movement parts produces all can cause the vibration of lathe, in addition make machine element for example foundry goods such as bed piece or column etc. bend and be out of shape.
At present solution to the problems described above has three, one, improves functional part and lathe self structure rigidity such as leading screw, guide rail as far as possible, this moment feed system cost height, machine tool structure complicates, weight is big; The 2nd, from the SERVO CONTROL angle, suppress the platform vibration, this scheme effect is limited, and does not possess versatility; The 3rd, that adopts that the smart machine of day Benson company proposes drives the feed system frame for movement design concept of the two driver elements of employing of (DCG-Drive atCenter of Gravity) principle based on center of gravity.In Japan Patent JP9262727, to address a kind ofly based on the machine tool feed system architecture that is used for horizontal Machining centers, this structure adopts dual linear motor in the bilateral driving of platform.In Japan Patent US2005031429-A1, US2005032616-A1 and US20060143889-A1, address a kind of vertical machining centre, wherein Y-axis and Z axle feed system adopt the above-mentioned bilateral drives structure of mariages thick stick based on DCG.Driver element arrangement form and platform structure in the feed system structure of above-mentioned employing mariages thick stick (the mariages thick stick drives and is example), workbench is attached to matrix by guide rail, arrange the ball-screw driver element in each guide rail outside, and make workbench position of centre of gravity W and mariages thick stick thrust point (leading screw axis) in same plane.Above-mentioned feed system structure based on DCG can effectively suppress machine vibration.When workbench position of centre of gravity W (installing workpiece additional) when Y direction changes, by control mariages thick stick driving force F
DlAnd F
DrSize satisfy the Z axle moment M that following formula can compensate the relative workbench center of gravity with external force of driving force
z
F
dl(c-y
dr)-F
dry
dr-M
z＝0
In the formula, y
DrBe respectively F with c
DrWith the spacing of center of gravity W and c be two driver element spacings.Workbench and workpiece close position of centre of gravity W when Z-direction has rising, driving force F
Dl, F
DrY-axis moment M with the relative center of gravity of external force F
yEquidirectional, can't be compensated.But the feed system structural design thinking based on the DCG principle in the foregoing invention can be used as the important method of such problem of solution.
Summary of the invention:
The object of the present invention is to provide a kind of rational in infrastructurely, can effectively suppress to change the feed system that the multi-drive cause the machine vibration that causes is formed because of feed system workbench position of centre of gravity.
Technical solution of the present invention is:
The feed system that a kind of multi-drive is formed, it is characterized in that: comprise workbench, workbench links by guide rail and matrix, and two driver elements are separately positioned on both sides, workbench top, in the workbench bottom other driver element are set.
Workbench is stairstepping, and two driver elements are arranged on the ladder of both sides, workbench top, and guide rail is arranged on the ladder of both sides, workbench middle part, and other driver element has one at least, and is arranged on the workbench bottom.
Two driver elements are two ball-screws, and other driver element is linear electric motors, and are connected bottom the mover of linear electric motors and the workbench, and the stator and the matrix of linear electric motors are connected.Workbench installs position of centre of gravity W behind the workpiece additional when Y direction changes, two ball-screw driving force F
Dl, F
DrWith linear electric motors driving force F
DmSize and Orientation satisfy the relative center of gravity equivalent moment of the Z axle external force M that formula (1) can compensate the relative workbench center of gravity with external force of driving force
z,
F
dl(c-y
dr)-F
dry
dr-F
dmy
dm-M
z＝0(1)
In the formula (1), y
Dr, y
DmBe respectively F with c
Dr, F
DmSpacing and two driver element spacing apart from center of gravity W;
Workbench installs position of centre of gravity W behind the workpiece additional when Z-direction raises, mariages thick stick driving force F
Dl, F
DrWith linear electric motors driving force F
DmSize and Orientation satisfy the relative center of gravity equivalent moment of the Y-axis external force M that formula (2) can compensate the relative workbench center of gravity with external force of driving force
y,
F
dmz
dm-(F
dl+F
dr)z
dr-M
y＝0(2)
In the formula (2), z
DmAnd z
DrBe respectively F
Dm, F
DrSpacing with center of gravity W.
Two driver elements are two ball-screws, and other driver element is other mariages thick stick driver element, and described other mariages thick stick driver element is symmetrically arranged in table slide respectively with the both sides, lower part.
Workbench is rectangular, and two driver elements are arranged in both sides, workbench top, and other driver element has two, and is arranged on the both sides of workbench lower middle portion.
The fabrication hole that alleviates workbench weight is set on the workbench.
When feed system structure of the present invention realized that the workbench position of centre of gravity changes arbitrarily in perpendicular to the driving force direction plane, the moment of the relative center of gravity that driving force and external force form all was compensated, and at utmost suppresses the feed system mechanical oscillation; Can improve the feed system acceleration; Can improve the surface quality of workpiece processing.
Description of drawings:
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is the configuration diagram of the embodiment of the invention 1.
Fig. 2 is the Z direction diagrammatic sketch of embodiment 1.
Fig. 3 is the Y direction diagrammatic sketch of embodiment 1.
Fig. 4 is the configuration diagram of embodiment 2.
Fig. 5 is the configuration diagram of embodiment 3.
The specific embodiment:
Embodiment 1:
Fig. 1 adopts two ball-screws to add the directions X schematic diagram of a kind of feasible configurations of three driver element feed system structures of linear electric motors and driver element arrangement form among the present invention.Workbench 14 adopts ladder-type structure among the figure, leave fabrication hole 15 thereon for reducing workbench weight, workbench 14 is attached on the matrix 16 by guide rail 13a and 13b, two ball- screw 11a and 11b are arranged in workbench 14 both sides respectively, linear electric motors 12 mover 12a and workbench 14 bottoms connect firmly, stator 12b connects firmly matrix 16, and linear electric motors 12 are not limited to and are arranged in workbench 14 bottom symmetrical centre.Among the present invention, do not require that workbench 14 position of centre of gravitys and two driver element 11a and 11b thrust point are in same plane.The present invention can guarantee the X-axis driving force by workbench 14 position of centre of gravity W by the moment of face of control multi-drive driving force size and Orientation compensation Y-axis and Z axle, realizes that DCG drives.
Fig. 2 is the Z direction schematic diagram in the said structure among the present invention.When workbench 14 position of centre of gravity W (installing workpiece 17 additional) change in the diagram Y direction, mariages thick stick driving force F
Dl, F
DrWith linear electric motors driving force F
DmSize and Orientation satisfy the relative center of gravity equivalent moment of the Z axle external force M that formula (2) can compensate the relative workbench center of gravity with external force of driving force
z
F
dl(c-y
dr)-F
dry
dr-F
dmy
dm-M
z＝0(2)
In the formula (2), y
Dr, y
DmBe respectively F with c
Dr, F
DmSpacing and two driver element spacing apart from center of gravity W.
Fig. 3 is a Y direction schematic diagram in the said structure among the present invention, workbench 14 and workpiece 17 close position of centre of gravity W in Z-direction when raising, mariages thick stick driving force F
Dl, F
DrWith linear electric motors driving force F
DmSize and Orientation satisfy the relative center of gravity equivalent moment of the Y-axis external force M that formula (3) can compensate the relative workbench center of gravity with external force of driving force
y
F
dmz
dm-(F
dl+F
dr)z
dr-M
y＝0(3)
In the formula (2), z
DmAnd z
DrBe respectively F
Dm, F
DrSpacing with center of gravity W.
Driver element collocation form and platform structural requirement in the multi-drive feed system: (a) bilateral driver element type is identical, (b) the bottom driver element needn't bilateral relatively driver element symmetric arrangement and is not restricted to a driver element, (c) the platform center of gravity needn't with bilateral driver element active force isoplanar.Adopt driver element not to be limited to linear electric motors or ball-screw etc.
Embodiment 2:
Feed system structure among Fig. 4 is the X-direction schematic diagram of collocation form that is used to load employing 4 driver elements of turntable 20.Be used for the situation of turntable in the configuration of Z-direction restriction Fig. 3 the 3rd driver element.The workbench 21 same trapezium structures that adopt among the figure, and open fabrication hole 22 on it, workbench 21 is attached on the matrix 23 by guide rail 19a and 19b, two driver elements (is example with the leading screw) 18a and 18b are symmetrically arranged in workbench 21 middle guides respectively with the both sides, top, and two in addition driver element 18c and 18d are symmetrically arranged in workbench 21 middle guides respectively with the both sides, lower part.
Embodiment 3:
Feed system structure among Fig. 5 is the X-direction schematic diagram that is used to load the collocation form that also adopts 4 driver elements of main shaft 28.This structure is applicable to the situation of main shaft configuration of the 3rd driver element in Z-direction restriction Fig. 3.Workbench 26 adopts rectangular configuration among the figure, and open fabrication hole 27 on it, workbench 26 is attached on the matrix 29 by guide rail 25a and 25b, two driver elements (is example with the leading screw) 24a and 24b are symmetrically arranged in branch both sides, workbench 26 middle and upper part respectively, and two in addition driver element 24c and 24d are symmetrical in workbench 26 lower middle portion both sides respectively.
Claims (2)
1. the feed system formed of a multi-drive, it is characterized in that: comprise workbench, workbench links by guide rail and matrix, and two driver elements are separately positioned on both sides, workbench top, in the workbench bottom other driver element are set; Workbench is stairstepping, and two driver elements are arranged on the ladder of both sides, workbench top, and guide rail is arranged on the ladder of both sides, workbench middle part, and other driver element has one at least, and is arranged on the workbench bottom; Two driver elements are two ball-screws, and other driver element is linear electric motors, and are connected bottom the mover of linear electric motors and the workbench, and the stator and the matrix of linear electric motors are connected; Workbench installs position of centre of gravity W behind the workpiece additional when Y direction changes, two ball-screw driving force F
Dl, F
DrWith linear electric motors driving force F
DmSize and Orientation satisfy the relative center of gravity equivalent moment of the Z axle external force M that formula (1) can compensate the relative workbench center of gravity with external force of driving force
z,
F
dl(c-y
dr)-F
dry
dr-F
dmy
dm-M
z＝0 (1)
In the formula (1), y
Dr, y
DmBe respectively F with c
Dr, F
DmSpacing and two driver element spacing apart from center of gravity W;
Workbench installs position of centre of gravity W behind the workpiece additional when Z-direction raises, mariages thick stick driving force F
Dl, F
DrWith linear electric motors driving force F
DmSize and Orientation satisfy the relative center of gravity equivalent moment of the Y-axis external force M that formula (2) can compensate the relative workbench center of gravity with external force of driving force
y,
F
dmz
dm-(F
dl+F
dr)z
dr-M
y＝0 (2)
In the formula (2), z
DmAnd z
DrBe respectively F
Dm, F
DrSpacing with center of gravity W.
2. the feed system that multi-drive according to claim 1 is formed is characterized in that: the fabrication hole that alleviates workbench weight is set on the workbench.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101821404A CN101618517B (en) | 2009-07-14 | 2009-07-14 | Feeding system consisting of multi-drive elements |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101821404A CN101618517B (en) | 2009-07-14 | 2009-07-14 | Feeding system consisting of multi-drive elements |
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| Publication Number | Publication Date |
|---|---|
| CN101618517A CN101618517A (en) | 2010-01-06 |
| CN101618517B true CN101618517B (en) | 2011-01-05 |
Family
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|---|---|---|---|
| CN2009101821404A Active CN101618517B (en) | 2009-07-14 | 2009-07-14 | Feeding system consisting of multi-drive elements |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102259280A (en) * | 2010-05-27 | 2011-11-30 | 刘玉民 | Grinding wheel stroke transmission device on linear motor driven numerical-control relieved tooth grinding machine y axis |
| CN102179698B (en) * | 2011-03-18 | 2013-12-04 | 陕西秦川机械发展股份有限公司 | Method for increasing processing precision of precise numerical control machine |
| CN103123476B (en) * | 2011-11-18 | 2015-10-28 | 中国科学院沈阳计算技术研究所有限公司 | A kind of single servo motor drives the control method for numerical control system of gang tool |
| CN103302538A (en) * | 2013-06-13 | 2013-09-18 | 嘉兴华嶺机电设备有限公司 | High frequency ultrahigh accelerating and decelerating micro-cutting motion control mechanism driven by gravity centre of linear motor |
| CN105729141A (en) * | 2016-04-08 | 2016-07-06 | 武汉理工大学 | Precise linear two-dimensional double-drive workbench based on control of open numerical-control system |
| CN109396539A (en) * | 2018-11-15 | 2019-03-01 | 长沙思胜智能设备有限公司 | Broaching machine and its workbench |
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2009
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