CN105373078A - Micro-scale positioning method for machining forging and casting blank - Google Patents
Micro-scale positioning method for machining forging and casting blank Download PDFInfo
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- CN105373078A CN105373078A CN201510843901.1A CN201510843901A CN105373078A CN 105373078 A CN105373078 A CN 105373078A CN 201510843901 A CN201510843901 A CN 201510843901A CN 105373078 A CN105373078 A CN 105373078A
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- forging
- casting blank
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/408—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by data handling or data format, e.g. reading, buffering or conversion of data
- G05B19/4086—Coordinate conversions; Other special calculations
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/45—Nc applications
- G05B2219/45039—Slitter, scoring
Abstract
The invention relates to a micro-scale positioning method for machining a forging and casting blank. Machining allowance is determined mainly by adopting a manual scribing mode at present because of complex structure and poor blank consistency of the forging and casting blank. The conventional mode is low in efficiency and high in rejection rate so that production efficiency and economic benefit are greatly influenced. The invention provides a forging and casting blank rapid machining method based on an online measurement technology. Dots are marked on three typical surfaces, which are not parallel to each other, of the blank so that multiple typical data dots are obtained; and then rotation quantity and movement quantity are calculated by utilizing a registration algorithm, and machining allowance automatic distribution of the blank is realized by automatic compensation of cutter paths so that numerical control of the machining process is realized. Forging and casting piece machining quality and efficiency can be greatly enhanced by the method.
Description
Technical field
The present invention relates to a kind of forging and casting fast processing method based on on-line measurement, the method mainly removes the manual scratching process of forging and casting blank, utilizes line Measurement Technique and registration Algorithm, auto-compensation cutter path, realizes the Full-numerical-control of forging and casting processing.The inventive method is only applicable to large surplus and has the blank of the plane that three are not parallel to each other.Belong to forging and casting processing technique field.
Background technology
The complicated forging and casting of aviation occupies very large ratio in large-scale civil helicopter, and its quantity increases year by year, only certain Helicopter Corporation one forging and casting from calendar year 2001 less than 1500, be now incremented to 9000 remainders.And the rejection rate of the aviation forge piece blank of the said firm is up to about 20%, the equipment that machine adds workshop 90% is common machining equipment, and the production 80% of forging and casting completes on conventional equipment, and rejection rate is high, efficiency is low has been the bottleneck restricting enterprise development.Comparatively serious problem is that numerous parts just finds defect in process, defines waste product.Cause the main cause of problems to be that original manual scribe fiducials location is not accurate enough, cause following process location difficulty, after processing, just find defect problem.Traditional method for manufacturing parts is: usually need before processing to rule, the effect of line is the difference comparing blahk structure and design of part, carry out surplus reasonable distribution, to determine the position of theoretical model in blank, this is the basis processing smart benchmark, the position of the coordinate system of the digital-to-analogue that theorizes blank mock-up space exactly viewed from mathematical angle and attitude.For complex-shaped part, manual line difficulty is large, is comparatively difficult to ensure the surplus in card shape face, space.
How to change the cooked mode that traditional forging and casting is manually rule, improve the working (machining) efficiency of forging and casting, detect defective of blank simultaneously before processing, with the qualification rate of the qualification rate and subsequent product that improve blank, just become urgently research and the practical engineering application difficult problem solved.The scheme of this kind of problem of current solution is exactly utilize registration Algorithm that the blank surface data point set collected is carried out accuracy registration with corresponding theoretical digital-to-analogue, ensure that blank point set surrounds theoretical digital-to-analogue completely, each machined surface leaves sufficient process redundancy, ensures the dimensional requirement of non-machined surface simultaneously.Here blank point set is the blank whole audience point set utilizing scanner to obtain, and enormous amount, has a strong impact on registration efficiency, also has a significant impact whole process.A lot of experts and scholars study registration Algorithm in theory at present, seldom have the scheme proposing to have more practicality on engineer applied.
Summary of the invention
The object of this invention is to provide a kind of micro-localization method processing forging and casting blank.The method utilizes line Measurement Technique and registration Algorithm, by auto-compensation cutter path, realizes blank process redundancy and automatically distributes, thus can remove the program of manual line, realizes digital Control of Machining Processes, greatly can improve the efficiency of forging and casting processing.
Technical scheme of the present invention: provide a kind of micro-localization method processing forging and casting blank, comprise the steps:
Step 1, acquisition forging and casting blank, described forging and casting blank has at least three planes be not parallel to each other; By forging and casting blank clamping on lathe, require that the working origin of lathe is pushed down in one of them face of forging and casting blank, and the reference axial direction of forging and casting blank and lathe X-axis angle are at ± 10 °;
Step 2, acquisition forging and casting blank model data and forging and casting model data, Cutter coordinate system is set up in 3 d modeling software, and in Cutter coordinate system, generate forging and casting blank model and forging and casting model, and the pose of monobloc forging cast model is lowered at Cutter coordinate system, forging and casting blank model is made to wrap forging and casting model completely, ensure that each face of forging and casting model all exists process redundancy, now derive cutter rail file by 3 d modeling software;
Step 3, by forging and casting blank model and forging and casting model integrally model, and adjust the pose of this block mold under Cutter coordinate system, make the initial point of one of them face through Cutter coordinate system of this forging and casting blank model, one of them face and the face of the forging and casting blank be pressed on the working origin of lathe of described forging and casting blank model are the faces at same position, and the reference axial direction of described forging and casting blank model and lathe X-axis angle are at ± 10 °;
Step 4, on forging and casting blank, select three planes be not parallel to each other, obtained the normal vector of forging and casting blank by these three plane computations; Under Cutter coordinate system, by the coordinate data of three planes that are not parallel to each other of forging and casting blank model, obtain the normal vector of forging and casting blank model; Phasor difference is obtained by the normal vector of above-mentioned forging and casting blank and the normal vector of forging and casting blank model;
Step 5, using the modified value of described phasor difference as above-mentioned cutter rail file, machining is carried out to forging and casting blank.
Beneficial effect
The forging and casting blank met the demands for part can remove its manual crossed process, reduces the Operational preparation time, greatly improves numerical control rate and the production efficiency of production run.
Embodiment
This inventive embodiment is below described.
The present invention is directed to the technological process that process redundancy is determined in the traditional craft line of forging and casting blank, provide a kind of micro-localization method processing forging and casting blank, comprise the steps:
Step 1, acquisition forging and casting blank, described forging and casting blank has at least three planes be not parallel to each other; By forging and casting blank clamping on lathe, require that the working origin of lathe is pushed down in one of them face of forging and casting blank, and the reference axial direction of forging and casting blank and lathe X-axis angle are at ± 10 °;
Step 2, acquisition forging and casting blank model data and forging and casting model data, Cutter coordinate system is set up in 3 d modeling software, and in Cutter coordinate system, generate forging and casting blank model and forging and casting model, and the pose of monobloc forging cast model is lowered at Cutter coordinate system, forging and casting blank model is made to wrap forging and casting model completely, ensure that each face of forging and casting model all exists process redundancy, now derive cutter rail file by 3 d modeling software;
Step 3, by forging and casting blank model and forging and casting model integrally model, and adjust the pose of this block mold under Cutter coordinate system, make the initial point of one of them face through Cutter coordinate system of this forging and casting blank model, one of them face and the face of the forging and casting blank be pressed on the working origin of lathe of described forging and casting blank model are the faces at same position, and the reference axial direction of described forging and casting blank model and lathe X-axis angle are at ± 10 °;
Step 4, on forging and casting blank, select three planes be not parallel to each other, obtained the normal vector of forging and casting blank by these three plane computations; Under Cutter coordinate system, by the coordinate data of three planes that are not parallel to each other of forging and casting blank model, obtain the normal vector of forging and casting blank model; Phasor difference is obtained by the normal vector of above-mentioned forging and casting blank and the normal vector of forging and casting blank model;
Step 5, using the modified value of described phasor difference as above-mentioned cutter rail file, machining is carried out to forging and casting blank.
Embodiment described above is in order to the present invention is described, but not in order to limit the present invention.Scope of invention is limited by the scope of attached claim.
Claims (1)
1. process a micro-localization method for forging and casting blank, it is characterized in that comprising the steps:
Step 1, acquisition forging and casting blank, described forging and casting blank has at least three planes be not parallel to each other; By forging and casting blank clamping on lathe, require that the working origin of lathe is pushed down in one of them face of forging and casting blank, and the reference axial direction of forging and casting blank and lathe X-axis angle are at ± 10 °;
Step 2, acquisition forging and casting blank model data and forging and casting model data, Cutter coordinate system is set up in 3 d modeling software, and in Cutter coordinate system, generate forging and casting blank model and forging and casting model, and the pose of monobloc forging cast model is lowered at Cutter coordinate system, forging and casting blank model is made to wrap forging and casting model completely, ensure that each face of forging and casting model all exists process redundancy, now derive cutter rail file by 3 d modeling software;
Step 3, by forging and casting blank model and forging and casting model integrally model, and adjust the pose of this block mold under Cutter coordinate system, make the initial point of one of them face through Cutter coordinate system of this forging and casting blank model, one of them face and the face of the forging and casting blank be pressed on the working origin of lathe of described forging and casting blank model are the faces at same position, and the reference axial direction of described forging and casting blank model and lathe X-axis angle are at ± 10 °;
Step 4, on forging and casting blank, select three planes be not parallel to each other, obtained the normal vector of forging and casting blank by these three plane computations; Under Cutter coordinate system, by the coordinate data of three planes that are not parallel to each other of forging and casting blank model, obtain the normal vector of forging and casting blank model; Phasor difference is obtained by the normal vector of above-mentioned forging and casting blank and the normal vector of forging and casting blank model;
Step 5, using the modified value of described phasor difference as above-mentioned cutter rail file, machining is carried out to forging and casting blank.
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| CN201510843901.1A CN105373078B (en) | 2015-11-26 | 2015-11-26 | A kind of micro localization method for processing forging and casting blank |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108247422A (en) * | 2017-12-29 | 2018-07-06 | 成都弘佛科技有限公司 | A kind of automatic capturing method for axle journal class part in numerical control machine tool |
| CN108917600A (en) * | 2018-07-05 | 2018-11-30 | 西安交通大学 | A kind of labyrinth blank processing positioning method based on three-dimensional reverse |
| CN109035238A (en) * | 2018-08-02 | 2018-12-18 | 哈尔滨工业大学 | A kind of machining allowance off-line analysis method towards Free-form Surface Parts |
| CN110069041A (en) * | 2018-01-24 | 2019-07-30 | 北京理工大学 | A kind of Work piece processing method and system based on on-machine measurement |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108247422A (en) * | 2017-12-29 | 2018-07-06 | 成都弘佛科技有限公司 | A kind of automatic capturing method for axle journal class part in numerical control machine tool |
| CN110069041A (en) * | 2018-01-24 | 2019-07-30 | 北京理工大学 | A kind of Work piece processing method and system based on on-machine measurement |
| CN110069041B (en) * | 2018-01-24 | 2020-09-29 | 北京理工大学 | Workpiece machining method and system based on-machine measurement |
| CN108917600A (en) * | 2018-07-05 | 2018-11-30 | 西安交通大学 | A kind of labyrinth blank processing positioning method based on three-dimensional reverse |
| CN109035238A (en) * | 2018-08-02 | 2018-12-18 | 哈尔滨工业大学 | A kind of machining allowance off-line analysis method towards Free-form Surface Parts |
| CN109035238B (en) * | 2018-08-02 | 2021-09-07 | 哈尔滨工业大学 | Machining allowance offline analysis method for free-form surface part |
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| CN105373078B (en) | 2018-01-16 |
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