CN100548549C - Multiple curved faces island five-axis helical method for processing - Google Patents
Multiple curved faces island five-axis helical method for processing Download PDFInfo
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- CN100548549C CN100548549C CNB2008100177951A CN200810017795A CN100548549C CN 100548549 C CN100548549 C CN 100548549C CN B2008100177951 A CNB2008100177951 A CN B2008100177951A CN 200810017795 A CN200810017795 A CN 200810017795A CN 100548549 C CN100548549 C CN 100548549C
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Abstract
The invention discloses a kind of multiple curved faces island five-axis helical method for processing, at first with blade physical model data input computer, the curved surface that extraction links to each other with the bottom surface, island, and carry out parametrization again, on the bottom surface, island, select four search initial points of back gouging tool heart track, make the island entity be positioned at the quadrangle inside that four initial points surround, from the physical space initial point, in parameter field, search for successively, generate multiple curved faces island back gouging tool heart trajectory, according to the multiple curved faces island entity structure, according to layer apart from the structure bottom-up ball head knife cutter heart helix around physical model, generate concrete cutter spacing track, the cutter spacing track of unified back chipping processing and the processing of island entity spiral also carries out postposition and handles, and processes on five-axle number control machine tool.Because adopt bottom-up spiral process tool trajectory design method, cutter path is continuous, machining accuracy is brought up to 0.05～0.08mm by 0.15～0.24mm of prior art.
Description
Technical field
The present invention relates to a kind of multiple curved faces island five-axis helical method for processing.
Background technology
Multiple curved faces island is one of important component part of complex-shaped surface mould structure or other large-scale integral constitutional details, is widely used in Aero-Space, automobile and mold manufacturing industry.It is how much topological relation integrated entity models being set up through operations such as cutting, connection back by many complex-curved, adopts numerical control milling to machine usually.Existing commercial CAD/CAM systems soft ware UG, hypermill etc. all comprised die cavity island processing module, lead the moving curve projection based on two dimension and generate cutter path, but because topological relation complexity between patch, cause projecting direction to be difficult to determine, the design of leading moving curve simultaneously also is difficult to follow the tracks of the curvature variation of curved surface, cause the track skewness, there is sudden change in the variation of cutter location, generating tool axis vector, is unfavorable for the realization of high-speed precision digital control processing.
Document " a kind of three-axis numerical control processing cutter rail generating algorithm, Nanjing Aero-Space University's journal, village naval, Zhou Rurong etc., 2002,34 (4): 332-335 based on physical model." a kind of three-axis numerical control processing algorithm of tool-path generation of suitable physical model disclosed; this method utilization parallel plane is asked with the Z-buffer model and is handed over the design cutter path; but can't handle having with z direction of principal axis vertical wall island part cutter path in the same way; problems such as and there are the cuttves of advancing and retreat in a large number in interplanar cutter spacing track; cause cutter path imperfect easily, and follow-up manual polishing amount is big; In addition, caused and cut the multiple curved faces island bottom surface, and caused machining accuracy to reduce owing to can't accurately controlling cutter.With three coordinate measuring machine the leaf basin damping platform that adopts said method processing is measured, machining accuracy is 0.15～0.24mm.
Summary of the invention
In order to overcome the low deficiency of prior art machining accuracy, the invention provides a kind of multiple curved faces island five-axis helical method for processing, this method is based on physical model planning spiral cutter spacing track, thereby merging island entity spiral and back chipping processing can realize the accurate digital control processing of multiple curved faces island.
The technical solution adopted for the present invention to solve the technical problems: a kind of multiple curved faces island five-axis helical method for processing is characterized in may further comprise the steps:
(a) with blade physical model data input computer;
(b) from physical model, extract the curved surface that links to each other with the bottom surface, island, and carry out parametrization again;
(c) on the bottom surface, island, select four of back gouging tool heart track to search for initial points, make the island entity be positioned at the quadrangle inside that four initial points surround;
(d),, generate multiple curved faces island back gouging tool heart trajectory from first initial point that physical space is selected according to the process tool radius;
(e) according to the multiple curved faces island entity structure, set up the processing local coordinate system, determine the axis, island by cuboid bounding box algorithm, with back gouging tool heart trajectory as the basis, the local coordinate system axis is the center, apart from the bottom-up ball head knife cutter heart helix around physical model of structure, revises cutter spacing according to layer, determine generating tool axis vector, generate concrete cutter spacing track;
(f) unify the cutter spacing track of back chipping processing and island entity spiral processing and carry out the postposition processing, on five-axle number control machine tool, process.
The invention has the beneficial effects as follows: the present invention adopts the Complex Surfaces body back chipping processing method based on a range search, the biasing surface of fundamentally having avoided these how much speciality of multiple curved faces island to cause is asked the generation of handing over wild effect, unified the processing of island main body and back chipping, back chipping and overlap joint zone are smooth continuously, do not have and obviously connect tool marks, the bottom-up spiral process tool trajectory design method that is adopted, cutter path is continuous, machining accuracy is brought up to 0.05～0.08mm by 0.15～0.24mm of prior art, when having guaranteed not have in the process redundancy advance and retreat cutter, reduced the manual polishing amount after digital control processing is finished.
Below in conjunction with drawings and Examples the present invention is elaborated.
Description of drawings
Accompanying drawing is certain blade of aviation engine schematic diagram that multiple curved faces island five-axis helical method for processing of the present invention is processed.
Among the figure, 1-damping platform, 2-blade and blade pelvic curvature face.
The specific embodiment
Be processed as example explanation the present invention with certain blade of aviation engine damping platform ball head knife.
Figure 1 shows that a kind of blade of aviation engine of typical band damping platform, a damping platform 1 arranged on blade and blade pelvic curvature face 2,, damping platform 1 is a kind of typical multiple curved faces island structure, its bounding box size: 12.46 * 59.01 * 34.74mm
3, the ball head knife tool radius R=5mm of employing, residual height h=0.01mm carries out the processing of leaf basin damping platform on five coordinate machining centers.The step that the inventive method bottom-up five-axis helical cutter spacing track and processing realize is as follows:
1. with blade physical model data input computer.
2. from blade physical model middle period basin damping platform entity 1, extract the curved surface leaf pelvic curvature face 2 that links to each other with the bottom surface, island, carry out parametrization again.
3. on leaf pelvic curvature face 2, select four search initial points, make leaf basin damping platform entity 1 be positioned at 4 quadrangle inside that surround.
4. according to the process tool radius,, in parameter field, search for successively, generate the back gouging tool heart trajectory of leaf basin damping platform 1 from first initial point that physical space is selected.
5. according to the multiple curved faces island entity structure, set up the processing local coordinate system, determine the axis, island by cuboid bounding box algorithm.With back gouging tool heart trajectory as the basis, the local coordinate system axis is the center, according to layer apart from the structure bottom-up ball head knife cutter heart helix around physical model, satisfying under the requirement on machining accuracy, automatically revise cutter spacing, determine generating tool axis vector, carry out five ball head knife spiral cutter spacing Trajectory Design of bottom-up leaf basin damping platform 1, generate concrete cutter spacing track based on back gouging tool heart track sequence.By given requirement on machining accuracy 0.1mm,, generate the back gouging tool heart sequence of leaf basin damping platform 1 etc. the discrete back gouging tool innermost being line of precision.
6. unify the cutter spacing track of back chipping processing and the processing of leaf basin damping platform entity spiral, and it is carried out postposition handle, on five machining centers, process.
With on the three coordinate measuring machine identical with background technology the leaf basin damping platform that adopts the inventive method processing being measured, machining accuracy is 0.05～0.08mm.Improve machining accuracy, reduced follow-up hand-polished workload.
Claims (1)
1, a kind of multiple curved faces island five-axis helical method for processing is characterized in that may further comprise the steps:
(a) with blade physical model data input computer;
(b) from the blade physical model, extract the curved surface that links to each other with the bottom surface, island, and carry out parametrization again;
(c) on the bottom surface, island, select four of back gouging tool heart track to search for initial points, make the island entity be positioned at the quadrangle inside that four initial points surround;
(d) according to the process tool radius, from first initial point that physical space is selected, in parameter field, search for successively, generate multiple curved faces island back gouging tool heart trajectory;
(e) according to the multiple curved faces island entity structure, set up the processing local coordinate system, determine the axis, island by cuboid bounding box algorithm, with back gouging tool heart trajectory as the basis, the local coordinate system axis is the center, apart from the bottom-up ball head knife cutter heart helix around physical model of structure, revises cutter spacing according to layer, determine generating tool axis vector, generate concrete cutter spacing track;
(f) unify the cutter spacing track of back chipping processing and island entity spiral processing and carry out the postposition processing, on five-axle number control machine tool, process.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2008100177951A CN100548549C (en) | 2008-03-26 | 2008-03-26 | Multiple curved faces island five-axis helical method for processing |
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| CNB2008100177951A CN100548549C (en) | 2008-03-26 | 2008-03-26 | Multiple curved faces island five-axis helical method for processing |
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| CN101249571A CN101249571A (en) | 2008-08-27 |
| CN100548549C true CN100548549C (en) | 2009-10-14 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102145402B (en) * | 2010-11-20 | 2013-09-04 | 无锡透平叶片有限公司 | One-time clamping four-shaft linkage rotary milling molding method for numerical control blade roots |
| CN102357666B (en) * | 2011-07-18 | 2013-04-17 | 西安交通大学 | Three-coordinate end milling method for blade with freeform surface by using flat-bottomed cutter |
| CN103760823B (en) * | 2014-01-24 | 2016-05-18 | 哈尔滨第一机械集团有限公司 | The meticulous spiral of Archimedes processing method of sphere based on UG4.0 |
| CN105290475B (en) * | 2015-11-05 | 2018-05-29 | 西安航空动力股份有限公司 | A kind of titanium alloy fan blade profile milling method |
| CN109249227B (en) * | 2017-07-12 | 2020-05-19 | 富鼎电子科技(嘉善)有限公司 | Electrode processing method |
| CN107368033B (en) * | 2017-09-04 | 2019-12-27 | 中国航发南方工业有限公司 | Blade number milling control method and control device |
| CN109343468B (en) * | 2018-10-25 | 2020-07-14 | 华中科技大学 | Projection offset-based blade multi-axis track generation method |
| CN109590812B (en) * | 2018-11-27 | 2019-11-29 | 苏州大学 | Aspherical path generating method is handled using air bag polishing |
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2008
- 2008-03-26 CN CNB2008100177951A patent/CN100548549C/en not_active Expired - Fee Related
Non-Patent Citations (4)
| Title |
|---|
| 一种基于实体模型的三轴数控加工刀轨生成算法. 庄海军，周儒荣，安鲁陵，周来水.南京航空航天大学学报，第34卷第4期. 2002 |
| 一种基于实体模型的三轴数控加工刀轨生成算法. 庄海军，周儒荣，安鲁陵，周来水.南京航空航天大学学报，第34卷第4期. 2002 * |
| 任意曲面叶片四坐标数控加工刀位轨迹的生成方法. 吴宝海，王尚锦.西安交通大学学报，第38卷第1期. 2004 |
| 任意曲面叶片四坐标数控加工刀位轨迹的生成方法. 吴宝海，王尚锦.西安交通大学学报，第38卷第1期. 2004 * |
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