CN102179698A - Method for increasing processing precision of precise numerical control machine - Google Patents
Method for increasing processing precision of precise numerical control machine Download PDFInfo
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- CN102179698A CN102179698A CN 201110066562 CN201110066562A CN102179698A CN 102179698 A CN102179698 A CN 102179698A CN 201110066562 CN201110066562 CN 201110066562 CN 201110066562 A CN201110066562 A CN 201110066562A CN 102179698 A CN102179698 A CN 102179698A
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Abstract
The invention provides a method for increasing processing precision of a precise numerical control machine. The method is characterized in that a reasonable mechanical layout is adopted for keeping a mass center of a linear axial motion part and the centers of a linear guide rail and a screw rod on a same plane, ensuring that a motion carriage is at the optimum stress state, eliminating a disturbing torque generated in the motion process, greatly increasing the mechanical rigidity of the linear axle and ensuring the motion precision, thereby realizing increasing the processing precision of the machine by optimizing the mechanical structure. Besides, if the linear axle which is used for finishing is provided with such a structure, the finishing precision of a grinding wheel also can be increased, so as to reduce the processing error and increase the processing precision. The method can be realized by only changing the installing positions of the linear guide rail and a ball screw. The integral assembling manufacturability is excellent and the assembling difficulty is not increased.
Description
Technical field
The invention belongs to Digit Control Machine Tool manufacturing technology field, be specifically related to a kind of method that improves the precise numerical control machine machining accuracy.
Background technology
Along with the fast development of high-end equipment manufacture, high-precision precise numerical control machine demand increases day by day, and then the kinematic accuracy and the positioning accuracy of Digit Control Machine Tool axis servomotor are had higher requirement.For the digital controlled linear axle, the accuracy of manufacture of guide rail, screw mandrel, installation accuracy and rational frame for movement arrangement etc. are the key factors that influences the linear axis kinematic accuracy.Traditional linear axis design is an arrangement form of determining guide rail, screw mandrel according to factors such as the frame for movement of lathe and appearance and size restrictions, the precision of kinematic axis depends on the machining accuracy of the accuracy of manufacture, installation accuracy and the lathe bed equivalent-load spare of guide rail, leading screw fully, reckon without rational mechanical layout the reduction of kinematic error is had crucial effects, moving component can produce bigger disturbing moment in motion process, and poor structure rigidity, cause the precision stability of lathe poor, the workpiece machining accuracy is not high, is difficult to realize high accuracy, high efficiency processing.At present, in the Digit Control Machine Tool design of precision, the linear axis drive scheme begins more and more barycenter drive thought that adopt, overcome the shortcoming of moving components such as planker, column to a great extent in motion process mechanical rigid difference, improved the workpiece machining accuracy of lathe, but in this kind scheme, the supporting guide of lathe can't be accomplished zero friction, planker is in motion process, because the existence of frictional force, still have big disturbing moment, the precision of lathe and less stable cause the machining accuracy of workpiece to reduce.
Summary of the invention
The technical problem that the present invention solves: a kind of method that improves the precise numerical control machine machining accuracy is provided, reasonably mechanical layout makes barycenter, line slideway and the leading screw center of linear axis moving component in the same plane substantially, guarantee that the motion planker is in best stress, eliminate the disturbing moment that produces in the motion process, the mechanical rigid of linear axis is increased substantially, kinematic accuracy is guaranteed, realizes improving machine finish from the angle of mechanical structure optimization.In addition, the linear axis of participating in finishing adopts this kind structure, also can improve the dressing accuracy of emery wheel, and then reduce mismachining tolerance, further improves machining accuracy.
The technical solution used in the present invention: a kind of method that improves the precise numerical control machine machining accuracy, have line slideway, moving component and leading screw, line slideway is installed on the guide rail faying face of lathe bed, leading screw is installed on the moving component, moving component is positioned on the line slideway, the leading screw drive motion components is along the line slideway rectilinear motion, and the central axis of the tread plane of described line slideway, the centroidal axis of moving component and leading screw is in the same plane.
Described line slideway level is installed on the guide rail faying face of lathe bed, and the leading screw level is installed on the moving component.
Described line slideway is vertically mounted on the guide rail faying face of lathe bed, and leading screw is vertically mounted on the moving component.
Be fixed with planker on the described moving component, and planker is positioned on the line slideway.
The centroidal axis of described moving component overlaps substantially with the central axis of leading screw.
Advantage that the present invention compared with prior art has and effect:
1, the linear axis kinematic accuracy improves greatly.The present invention only need change line slideway, the installation site of ball-screw, make the barycenter of linear axis moving component and line slideway and leading screw center in the same plane substantially, guarantee that the motion planker is in best stress, eliminate the disturbing moment that produces in the motion process, avoid in the motion process because " kowtowing " phenomenon that " top-heavy " causes, and then the stability and the kinematic accuracy of raising moving component, the mechanical rigid of linear axis is increased substantially, and then the kinematic accuracy of linear axis is increased substantially, realize improving machine finish from the angle of mechanical structure optimization.
2, dressing accuracy improves greatly.When depending on finishing, the dressing accuracy of emery wheel participates in the kinematic accuracy of two linear axis of interpolation.The linear axis of participating in finishing adopts this kind structure, also can improve the dressing accuracy of emery wheel, and then reduce mismachining tolerance, further improves machining accuracy.
3, cost is low.The installation site that only needs to change line slideway, ball-screw gets final product, and whole assembly process process is good, can not increase assembly difficulty.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is an embodiment of the invention structural representation.
The specific embodiment
Below in conjunction with accompanying drawing 1,2 first kind of embodiment of the present invention described.
A kind of method that improves the precise numerical control machine machining accuracy, have line slideway 1, moving component 2 and ball-screw 3, line slideway 1 level is installed on the guide rail faying face of lathe bed 5 upper ends, ball-screw 3 levels are installed on the moving component 2, the lower end of moving component 2 is fixed with planker 4, and planker 4 is positioned on the line slideway 1, ball-screw 3 drive motion components 2 are along line slideway 1 rectilinear motion.In order to overcome there is bigger disturbing moment in the precise numerical control machine linear axis in motion process problem, the central axis 8 of the tread plane 6 of described line slideway 1, the centroidal axis 7 of moving component 2 and horizontal screw lead 3 is positioned on the same horizontal plane substantially, and the centroidal axis 7 of moving component 2 overlaps substantially with the central axis 8 of horizontal screw lead 3.To guarantee being in best stress all the time in moving component 5 courses of work, reduce even eliminate disturbing moment in the motion process, avoid in the motion process because " kowtowing " phenomenon that " top-heavy " causes, and then the stability and the kinematic accuracy of raising moving component, make the mechanical rigid of linear axis increase substantially, kinematic accuracy is guaranteed, realizes improving machine finish from the angle of mechanical structure optimization.In addition, the linear axis of participating in finishing adopts this kind structure, also can improve the dressing accuracy of emery wheel, and then reduce mismachining tolerance, further improves machining accuracy.
The present invention is applied in the design of high-precision numerically control grinder, and its moving component 2 is the column of accurate broaching tool numerical control formation grinding machine, and column seesaws along lathe bed 5, and grinding tool 9 moves up and down along column.If according to traditional linear axis arrangement, because column is higher and grinding tool part planker quality is big, there is big disturbing moment in column in the process of seesawing, influence the lathe grinding accuracy.The present invention designs the tread plane 6 of line slideway 1, the centroidal axis 7 of moving component 2 and the central axis 8 of ball-screw 3 on same horizontal plane, and the centroidal axis 7 of moving component 2 is overlapped substantially with the central axis 8 of ball-screw 3, column stationarity in motion process is greatly improved, eliminate the situation of " top-heavy ", and then improved the grinding accuracy of workpiece.
Also described line slideway 1 can be vertically mounted on the guide rail faying face of lathe bed 5, leading screw 3 is vertically mounted on and constitutes second kind of embodiment of the present invention on the moving component 2.
The foregoing description is preferred embodiment of the present invention, is not to be used for limiting the scope of the present invention, so all equivalences of being done with the described content of claim of the present invention change, all should be included within the claim scope of the present invention.
Claims (5)
1. method that improves the precise numerical control machine machining accuracy, have line slideway (1), moving component (2) and leading screw (3), line slideway (1) is installed on the guide rail faying face of lathe bed (5), leading screw (3) is installed on the moving component (2), moving component (2) is positioned on the line slideway (1), leading screw (3) drive motion components (2) is characterized in that along line slideway (1) rectilinear motion: the central axis (8) of the tread plane (6) of described line slideway (1), the centroidal axis (7) of moving component (2) and leading screw (3) is in the same plane.
2. the method for raising precise numerical control machine machining accuracy according to claim 1 is characterized in that: described line slideway (1) level is installed on the guide rail faying face of lathe bed (5), and leading screw (3) level is installed on the moving component (2).
3. the method for raising precise numerical control machine machining accuracy according to claim 1 is characterized in that: described line slideway (1) is vertically mounted on the guide rail faying face of lathe bed (5), and leading screw (3) is vertically mounted on the moving component (2).
4. according to the method for claim 1 or 2 or 3 described raising precise numerical control machine machining accuracies, it is characterized in that: be fixed with planker (4) on the described moving component (2), and planker (4) is positioned on the line slideway (1).
5. according to the method for claim 1 or 2 or 3 described raising precise numerical control machine machining accuracies, it is characterized in that: the centroidal axis (7) of described moving component (2) overlaps substantially with the central axis (8) of leading screw (3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100665622A CN102179698B (en) | 2011-03-18 | 2011-03-18 | Method for increasing processing precision of precise numerical control machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100665622A CN102179698B (en) | 2011-03-18 | 2011-03-18 | Method for increasing processing precision of precise numerical control machine |
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| CN102179698A true CN102179698A (en) | 2011-09-14 |
| CN102179698B CN102179698B (en) | 2013-12-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104647146A (en) * | 2015-02-06 | 2015-05-27 | 湖南大学 | Grinding machine accuracy circular ascending method on basis of hydrostatic pressure spindle part |
| CN109558690A (en) * | 2018-12-12 | 2019-04-02 | 上海理工大学 | Mass center based on complete machine digital model drives machine tool design method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101618517A (en) * | 2009-07-14 | 2010-01-06 | 南通科技投资集团股份有限公司 | Feeding system consisting of multi-drive elements |
-
2011
- 2011-03-18 CN CN2011100665622A patent/CN102179698B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101618517A (en) * | 2009-07-14 | 2010-01-06 | 南通科技投资集团股份有限公司 | Feeding system consisting of multi-drive elements |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104647146A (en) * | 2015-02-06 | 2015-05-27 | 湖南大学 | Grinding machine accuracy circular ascending method on basis of hydrostatic pressure spindle part |
| CN109558690A (en) * | 2018-12-12 | 2019-04-02 | 上海理工大学 | Mass center based on complete machine digital model drives machine tool design method |
| CN109558690B (en) * | 2018-12-12 | 2023-04-18 | 上海理工大学 | Centroid driving machine tool design method based on complete machine digital model |
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| CN102179698B (en) | 2013-12-04 |
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Owner name: QINCHUAN MACHINE TOOL GROUP CO., LTD. Free format text: FORMER NAME: QINCHUAN MACHINERY DEVELOPMENT CO LTD, SHAANXI PROV |
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Address after: 721009, 22 Tan Tan Road, Shaanxi, Baoji Patentee after: Qin Chuan Machine Tool & Tool Group Co., Ltd. joint-stock company Address before: 721009, 22 Tan Tan Road, Shaanxi, Baoji Patentee before: Qinchuan Machinery Development Co., Ltd., Shaanxi Prov |