CN105867300A - Reverse remachining method for large forming welded part with complex contour - Google Patents
Reverse remachining method for large forming welded part with complex contour Download PDFInfo
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- CN105867300A CN105867300A CN201610374441.7A CN201610374441A CN105867300A CN 105867300 A CN105867300 A CN 105867300A CN 201610374441 A CN201610374441 A CN 201610374441A CN 105867300 A CN105867300 A CN 105867300A
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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
- G05B19/401—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 control arrangements for measuring, e.g. calibration and initialisation, measuring workpiece for machining purposes
- G05B19/4015—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 control arrangements for measuring, e.g. calibration and initialisation, measuring workpiece for machining purposes going to a reference at the beginning of machine cycle, e.g. for calibration
-
- 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
- G05B19/4097—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 using design data to control NC machines, e.g. CAD/CAM
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- Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Numerical Control (AREA)
Abstract
The invention discloses a reverse remachining method for a large forming welded part with a complex contour. Firstly, the part is subjected to measurement fitting for conversion of a coordinate system, and a model is reversely reconstructed according to point cloud data acquired after scanning; then the dimensional deviation between the reversely-reconstructed model and an initially-designed model is analyzed, and redesign is conducted based on the reversely-reconstructed model; finally, a numerical control machining mode is determined, and the reconstructed model is subjected to automatic programming. By means of the measuring and reversing method, the deviation between the part entity and the designed model can be rapidly acquired, redesign is conducted based on the reconstructed model, and the actual product can be rapidly remachined.
Description
Technical field
The present invention relates to component of machine manufacture field, a kind of large-scale molding weldment to having complex outline
Reverse process for subsequent treatment.
Background technology
For having the large-scale molding weldment of complex outline, its actual modeling also exists the most partially with designing a model
Difference, also can leave certain allowance to the processing end face of parts simultaneously in the fabrication process.In order to obtain last institute
The parts needed, it is necessary to reprocessing molding weldment, this is accomplished by a reverse process to find out realistic model
With the dimensional discrepancy designed a model, and then carry out follow-up design and reprocessing according to dimensional discrepancy.
It is reverse again that summary of the invention it is an object of the invention to provide a kind of large-scale molding weldment to having complex outline
Processing method, to realize inversely reprocessing the large-scale molding weldment of complex outline.
In order to achieve the above object, the technical solution adopted in the present invention is:
A kind of large-scale reverse process for subsequent treatment of molding weldment to having complex outline, it is characterised in that: comprise the following steps:
(1), use laser tracker that parts entirety is measured, to obtain its overall profile data, and will in the way of matching
Overall profile data are transformed in the design coordinate system of parts, make laser tracker coordinate system and design drawing coordinate system one
Cause；
(2), use laser scanner to need working position to be scanned parts, obtain its cloud data；
(3), using Catia to process cloud data, curved surface and the entity of Reverse reconstruction parts obtain reconstruction model；
(4), dimensional discrepancy between reconstruction model and the initial designs model of parts is analyzed, and according to actual production demand,
Again design on the basis of reconstruction model, it is thus achieved that required designs a model again；
(5), determine digital control processing mode according to reconstruction model with again designing a model, reconstruction model is carried out at automated programming
Reason；
(6), according to automated programming result, parts are carried out digital control processing.
Described a kind of large-scale reverse process for subsequent treatment of molding weldment to having complex outline, it is characterised in that: step
Suddenly, in (1) (2), use laser tracker and laser scanner that parts multiple fixing points physically are measured respectively,
And carry out coupling a little, make laser scanner unify mutually with laser tracker coordinate system.
The present invention, by the means measured, utilizes reverse method can reconstruct the 3D mould of actual parts quickly
Type, by with the contrast that designs a model, it is possible to the dimensional discrepancy between obtaining actual parts accurately and designing a model.Secondly energy
Enough according to actual requirement, directly redesign on 3D model, quickly actual product is reprocessed.
Accompanying drawing explanation
Fig. 1 is the flow process framework of reverse reprocessing；
Fig. 2 is parts design model；
Fig. 3 is that laser tracker is measured and mechanical arm scanning result；
Fig. 4 is end face Point Cloud Processing process；
Fig. 5 is reconstruction model and the local contrast figure that designs a model.
Detailed description of the invention
As it is shown in figure 1, it is a kind of to having the large-scale reverse process for subsequent treatment of molding weldment of complex outline, including following step
Rapid:
(1), use laser tracker that parts entirety is measured, to obtain its overall profile data, and will in the way of matching
Overall profile data are transformed in the design coordinate system of parts, make laser tracker coordinate system and design drawing coordinate system one
Cause；
(2), use laser scanner to need working position to be scanned parts, obtain its cloud data；
(3), using Catia to process cloud data, curved surface and the entity of Reverse reconstruction parts obtain reconstruction model；
(4), dimensional discrepancy between reconstruction model and the initial designs model of parts is analyzed, and according to actual production demand,
Again design on the basis of reconstruction model, it is thus achieved that required designs a model again；
(5), determine digital control processing mode according to reconstruction model with again designing a model, reconstruction model is carried out at automated programming
Reason；
(6), according to automated programming result, parts are carried out digital control processing.
In step (1) (2), use laser tracker and laser scanner to parts multiple fixing points physically respectively
Measure, and carry out coupling a little, make laser scanner unify mutually with laser tracker coordinate system.
Process of the present invention is as follows:
1. using laser tracker that parts measure matching, parts will be as in figure 2 it is shown, and will own in the way of matching
Point be transferred to design a model in coordinate system；
2. use laser scanner that parts end is scanned, generate end points cloud, as shown in Figure 3；
Use laser scanner and laser tracker to measure fixing 5 to 7 transition points on parts the most respectively, then carry out a little
Coupling, a cloud is changed in the coordinate system designed a model；
4. by Catia, cloud data is processed, reconstructed surface and entity, as shown in Figure 4；
5. reconstruction model and initial designs model are compared, it is thus achieved that if its dimensional discrepancy is not as it is shown in figure 5, dimensional discrepancy exists
In the margin of tolerance, then needing actual parts are carried out dimension correction, after correction, repetition step 1 is to 5, till size qualification；
6. according to needs of production, it is designed on the basis of reconstruction model, it is thus achieved that required designs a model；
7., according to composite factors such as numerical control device, processing tool, reconstruction model, new design model, tool types, pass through Pro/NC
CAM bank determine digital control processing mode, reconstruction model is carried out automated programming process, generates Path file；
8. the Path file of step 7 generates NC machining code after postpositive disposal, inputs Digit Control Machine Tool, enters parts
Row processing.
Claims (2)
1. the large-scale reverse process for subsequent treatment of molding weldment to having complex outline, it is characterised in that: include following step
Rapid:
(1), use laser tracker that parts entirety is measured, to obtain its overall profile data, and will in the way of matching
Overall profile data are transformed in the design coordinate system of parts, make laser tracker coordinate system and design drawing coordinate system one
Cause；
(2), use laser scanner to need working position to be scanned parts, obtain its cloud data；
(3), using Catia to process cloud data, curved surface and the entity of Reverse reconstruction parts obtain reconstruction model；
(4), dimensional discrepancy between reconstruction model and the initial designs model of parts is analyzed, and according to actual production demand,
Again design on the basis of reconstruction model, it is thus achieved that required designs a model again；
(5), determine digital control processing mode according to reconstruction model with again designing a model, reconstruction model is carried out at automated programming
Reason；
(6), according to automated programming result, parts are carried out digital control processing.
The most according to claim 1 a kind of to having the large-scale reverse process for subsequent treatment of molding weldment of complex outline, its
It is characterised by: in step (1) (2), uses laser tracker and laser scanner to parts physically multiple fixing respectively
Point measures, and carries out coupling a little, makes laser scanner unify mutually with laser tracker coordinate system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610374441.7A CN105867300A (en) | 2016-05-26 | 2016-05-26 | Reverse remachining method for large forming welded part with complex contour |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610374441.7A CN105867300A (en) | 2016-05-26 | 2016-05-26 | Reverse remachining method for large forming welded part with complex contour |
Publications (1)
| Publication Number | Publication Date |
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| CN105867300A true CN105867300A (en) | 2016-08-17 |
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| CN201610374441.7A Pending CN105867300A (en) | 2016-05-26 | 2016-05-26 | Reverse remachining method for large forming welded part with complex contour |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110065068A (en) * | 2019-04-08 | 2019-07-30 | 浙江大学 | A kind of robotic asssembly operation programming by demonstration method and device based on reverse-engineering |
| CN111422374A (en) * | 2020-04-01 | 2020-07-17 | 中国航空制造技术研究院 | Coordination and compensation method suitable for welded part and machine body structure |
| CN114708587A (en) * | 2022-06-06 | 2022-07-05 | 中科航迈数控软件(深圳)有限公司 | Method for determining machining allowance of workpiece of numerical control machine tool based on image recognition |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102187286A (en) * | 2008-12-19 | 2011-09-14 | 波音公司 | Component repair using reverse engineering |
| CN102222149A (en) * | 2011-07-04 | 2011-10-19 | 南京航空航天大学 | Error compensation method for integral turbine blade machining based on mathematical model reconstruction |
| CN104057363A (en) * | 2014-06-10 | 2014-09-24 | 浙江大学 | Three-axis numerical control machine tool geometrical error compensation method based on workpiece model rebuilding |
-
2016
- 2016-05-26 CN CN201610374441.7A patent/CN105867300A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102187286A (en) * | 2008-12-19 | 2011-09-14 | 波音公司 | Component repair using reverse engineering |
| CN102222149A (en) * | 2011-07-04 | 2011-10-19 | 南京航空航天大学 | Error compensation method for integral turbine blade machining based on mathematical model reconstruction |
| CN104057363A (en) * | 2014-06-10 | 2014-09-24 | 浙江大学 | Three-axis numerical control machine tool geometrical error compensation method based on workpiece model rebuilding |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110065068A (en) * | 2019-04-08 | 2019-07-30 | 浙江大学 | A kind of robotic asssembly operation programming by demonstration method and device based on reverse-engineering |
| CN111422374A (en) * | 2020-04-01 | 2020-07-17 | 中国航空制造技术研究院 | Coordination and compensation method suitable for welded part and machine body structure |
| CN114708587A (en) * | 2022-06-06 | 2022-07-05 | 中科航迈数控软件(深圳)有限公司 | Method for determining machining allowance of workpiece of numerical control machine tool based on image recognition |
| CN114708587B (en) * | 2022-06-06 | 2022-09-02 | 中科航迈数控软件(深圳)有限公司 | Image recognition-based numerical control machine tool workpiece machining allowance determination method |
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Application publication date: 20160817 |
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