CN109318058A - A kind of adaptive machining method based on numerically-controlled machine tool - Google Patents
A kind of adaptive machining method based on numerically-controlled machine tool Download PDFInfo
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- CN109318058A CN109318058A CN201811442100.4A CN201811442100A CN109318058A CN 109318058 A CN109318058 A CN 109318058A CN 201811442100 A CN201811442100 A CN 201811442100A CN 109318058 A CN109318058 A CN 109318058A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/20—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring workpiece characteristics, e.g. contour, dimension, hardness
Abstract
A kind of adaptive machining method based on numerically-controlled machine tool, comprising the following steps: step 1, analysis design of part determine processing compensation scheme according to required machined surface；Step 2, according to processing compensation scheme, work out process of measurement, on-line measurement carried out to the machining benchmark of part by numerical control machining center on-line measurement function, obtained dynamic variable data are automatically passed to save in the lathe parameter of setting；Step 3, according to processing compensation scheme and in dynamic variable data, work out dynamic machining program；After step 4, part processing, automatic measurement is carried out to the part size after processing by numerical control machining center on-line measurement function, is compared with the theoretical value of detail drawing, if part size is unqualified, feeds back to processing program, re-start processing；The present invention solves the parts machining benchmarks such as thin wall, essence casting class variation influence caused by part processing quality, improves the stability, reliability and interchangeability of product.
Description
Technical field
The invention belongs to numerical controlled machinery processing technique fields, and in particular to a kind of adaptive machining side based on numerically-controlled machine tool
Method.
Background technique
Large thin-wall part, essence casting part more and more appear in the structure of aero-engine, and thin-walled parts are variable
Shape, essence casting part consistency is poor, existing processing technology, and control benchmark mutation ability is than relatively limited, using existing processing skill
Art must reduce the error of part by the processing method modified repeatedly, to guarantee the processing quality of part, processing efficiency is low,
Artifical influence factor is big, and human cost is high, and cannot evade influence of the part error to processing quality completely.With domestic and international
The continuous transformation of situation, to Aeroengine Stability, quality, efficiency, cost be made higher requirement, therefore urgent
Need to find a kind of method for effectively solving problems.Continually develop application by line Measurement Technique, be it is a kind of efficiently,
Low cost solves a kind of method of problems.
Summary of the invention
Part processing quality is influenced in order to solve the problem of that the machining benchmarks such as thin wall, essence casting class easily change, is effectively improved
Process automation is horizontal, improves processing efficiency, reduces cost, reduces processing risk, and the present invention provides a kind of based on numerically-controlled machine tool
Adaptive machining method, technical solution is as follows:
A kind of adaptive machining method based on numerically-controlled machine tool, comprising the following steps:
Step 1, analysis design of part determine processing compensation scheme according to required machined surface, processing needed for specially determining
Face, and determine that the axis that acts is compensation axis when processing the face；
Step 2, according to processing compensation scheme, work out process of measurement, by numerical control machining center on-line measurement function to zero
The machining benchmark of part carries out on-line measurement, and obtained dynamic variable data are automatically passed to save in the lathe parameter of setting；
Step 3, according to processing compensation scheme and in dynamic variable data, work out dynamic machining program, the dynamic machining
Program uses dynamic variable data collected, and Multi-axis simultaneous machining forms the dynamic machining journey that adaptively can dynamically compensate
Sequence, achieve the purpose that it is profile-followed just curved, to realize adaptive machining, it is ensured that part wall thickness or depth equidimension characteristic meet part
Processing quality requirement；
After step 4, part processing, the part size after processing is carried out certainly by numerical control machining center on-line measurement function
Dynamic measurement, is compared with the theoretical value of detail drawing, if part size is unqualified, feeds back to processing program, re-start
Processing；
Meanwhile in conjunction with tool life management, cutter access times or time, knife benefit long to knife, coordinate system or processing program
Offset data is automatically corrected compensation, makes program with self study self-compensating function, and can control the actual size of part
Interval range, part size and processing quality after finally ensuring to process.
Preferably, measurement scheme described in step 2, measuring surface are chosen the type face changed greatly, measurement datum, are not done
The surface for relating to the deformations such as surface carries out on-line measurement.
Preferably, lathe parameter described in step 2 uses custom parameter.
Preferably, the specifically used GUD parameter of lathe parameter described in step 2.
Compared with prior art, the beneficial effects of the present invention are:
Present invention application adaptive machining method solves the variation of the parts machining benchmarks such as thin wall, essence casting class and adds to part
It is influenced caused by working medium amount, realizes automation, intelligent, adaptive machining, product size Characteristics Control is improved in optimum interval
Stability, reliability and the interchangeability of product.
The technology has been used for more machining center equipment, solves quality problems caused by part deformation, molten error etc.,
Improve the automation working ability of lathe, improve machine tool utilization rate, be effectively reduced human cost, it is with higher economical and
Practical value.
Detailed description of the invention
Fig. 1 is a kind of flow chart of adaptive machining method based on numerically-controlled machine tool of the invention
Specific embodiment
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute is only used in the embodiment of the present invention
In explaining in relative positional relationship, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component, if should
When particular pose changes, then directionality instruction also correspondingly changes correspondingly.
The adaptive machining method based on numerically-controlled machine tool that the present invention provides a kind of, comprising the following steps:
A kind of adaptive machining method based on numerically-controlled machine tool, comprising the following steps:
Step 1 is directed to part processing type face, analyzes structure process, distortion inaccuracy, processing program and the compensation side of part
Formula establishes processing cutter axis orientation, to establish processing compensation scheme and compensate the direction of axis (with processing cutter shaft direction of motion phase
Together), mathematical compensation model is established；
Specifically, establishing processing compensation scheme is specially the face processed needed for determining, and determines and moved when processing the face
Axis (X-axis, Y-axis, Z axis or B axle) be compensation axis compensate.
Step 2, according to processing compensation scheme, establish corresponding measurement scheme, establish measurement model, work out process of measurement,
On-line measurement is carried out to the machining benchmark of part by the infrared ray gauge head of numerical control machining center, obtained dynamic variable data are certainly
Dynamic be transmitted in the lathe parameter of setting saves.
The model of the numerical control machining center used in the present embodiment is specially the MANDELLI_ of Siemens 840D series
1600, it is of course also possible to use other numerical control machining centers or numerically-controlled machine tool with on-line measurement function.
To avoid parameter conflict, it is preferable to use custom parameters, such as GUD parameter, storage location to be specially for lathe parameter
LSR_R[1]-LSR_R[500]。
Step 3, according to processing compensation scheme and in dynamic variable data, work out dynamic machining program, the dynamic machining
Program uses dynamic variable data collected, and Multi-axis simultaneous machining forms the processing program of adaptive dynamic compensation, reach with
Shape is with regard to curved purpose, i.e. processing part is curve shape, and processing program is also curve shape, and processing part is waveform, processing
Program is also waveform, to realize adaptive machining, it is ensured that part wall thickness or depth equidimension characteristic meet part processing matter
Amount requires.
After step 4, part processing, the part size after processing is carried out certainly by numerical control machining center on-line measurement function
Dynamic measurement, is compared with theoretical value, if part size is unqualified, feeds back to processing program, re-start processing；
Meanwhile in conjunction with tool life management, cutter access times or time, empirical data is formed, long, knife is mended, sat to knife
Mark system or processing program offset data are automatically corrected compensation, make program with self study self-compensating function, and can control
The actual size interval range of part, part size and processing quality after finally ensuring to process.
Specifically, measurement scheme described in step 2, measuring surface generally choose the type face changed greatly, measurement datum,
The surface that interference surface etc. is not able to reflect deformation rule carries out on-line measurement, and generally, part variation is bigger, acquired point
It should be more intensive.
Method of the invention is specifically described by taking load shaped part as an example as follows.
Step 1, for processing type face needed for part, analysis design of part technique, distortion inaccuracy, processing program and compensation side
Formula establishes processing compensation scheme, establishes compensation axis, establishes mathematical compensation model.Load shaped part is thin-wall annular part, main to add
There are two work difficult points, and one is part wall thickness dimension characteristic, the other is connect tool marks problem, that is, this process processing characteristics with
The control problem of the indirect tool marks size of process processing characteristics before, deformation are concentrated mainly on the bounce of parts fixation rear end face and circumference
It is public not can guarantee wall thickness characteristic beyond defined technical conditions, such as end face run-out 0.2mm, circumference bounce 0.2mm is processed for bounce
Poor 0.2mm and the quality requirement for meeting tool marks characteristic maximum 0.15mm.By the processing for being directed to process equipment major axes orientation and part
The analysis in type face, the Y-axis and Z axis established in processing program are compensation axis, and dynamic compensates real by way of with B axle three-shaft linkage
Existing self adaptive control.Processing end face direction connects tool marks problem, by that can will connect tool marks error to knife combination on-line measurement in machine
Control is in 0.02mm.Processing circumferencial direction connects tool marks problem, due to allowing knife problem can be by the number after processing in processing
Automatic offset data setting is carried out according to measurement, offset is superimposed upon automatically in Z axis data, it can allow knife data by TRANS Z=,
It compensates or coordinate system $ P_UIFR [1, Z, FI] is compensated；
Step 2, according to processing compensation scheme, establish corresponding measurement scheme, establish measurement model, work out process of measurement,
On-line measurement is carried out to part machining benchmark, obtained dynamic variable data are automatically passed to save in lathe parameter.General choosing
The surface for taking type face, measurement datum, non-interference surface for changing greatly etc. to be able to reflect deformation rule carries out on-line measurement.Zero
Part variation is bigger, and acquired point should be more intensive.
This part is large-sized ring part, and part end face bounce and circumference bounce variation are relatively uniform, according to multiple measurement number
According to summary as a result, we select every 20 degree to index measurement point, acquire data can satisfy processing request.On-line measurement
The datum level connect in tool marks surface and processing for measurement is generated between surface selection two procedures, to avoid parameter conflict,
Custom parameter should be used, circumference bounce 0-360 degree evidence is separately recorded in LSR_R [1]-LSR_R [18]), end face run-out 0-
360 degrees evidence is separately recorded in LSR_R [19]-LSR_R [36]), the surface for connecing tool marks is generated in slot bottom position, and circumference bounce is jumped
It is separately recorded in LSR_R [41]-LSR_R [58]) in parameter；
Step 3, according to processing compensation scheme and obtained dynamic variable data (customized GUD parameter), establishment dynamic plus
Engineering sequence, should add the dynamic variable data that front acquires in processing program, and when Multi-axis simultaneous machining forms adaptive dynamic and mends
Processing program is repaid, achievees the effect that profile-followed just curved, is i.e. processing part is curve shape, and processing program is also curve shape, processing
Part is waveform, and processing program is also waveform, realizes adaptive machining, it is ensured that part wall thickness characteristic or depth connect tool marks
Characteristic etc. meets part processing request, and processing quality is optimal.
Processing program is as follows:
Automatic measurement is carried out to processing dimension after step 4, processing, and is compared with theoretical value, and combines cutter life
Management, cutter access times or time form empirical data, are recorded in LSR_R [40], to knife length, knife benefit, coordinate system or add
Engineering sequence offset data is automatically corrected compensation, makes program with self study self-compensating function, and can control the reality of part
Border size interval range, such as connect tool marks control and execute program MM01 in 0.02mm, it connects tool marks control and is executed in 0.02-0.05mm
Program MM02 connects tool marks control in 0.05-0.1mm and executes program MM03, it is ensured that the part size after processing is optimal.
Processing effect shows that part wall thickness characteristic uniformity after processing, fluctuation range is not more than 0.05mm, part end face
It connects tool marks to can be controlled in 0.02mm, part circumferencial direction connects tool marks and can control within the scope of 0.03mm, it is ensured that part size
100% qualified and being optimal of processing quality.
Excellent place of the invention is, it is stringent that this processing method is very suitable to processing dimension characteristic requirements, part benchmark
The case where variable quantity is larger, and part machining state is not able to satisfy processing request can be solved these problems quickly.
The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, although referring to above-described embodiment pair
The present invention is described in detail, and the those of ordinary skill in field is it is understood that still can be to specific embodiment party of the invention
Formula is modified or replaced equivalently, and without departing from any modification of spirit and scope of the invention or equivalent replacement, it should all
Cover in present claims range.
Claims (4)
1. a kind of adaptive machining method based on numerically-controlled machine tool, which comprises the following steps:
Step 1, analysis design of part determine processing compensation scheme according to required machined surface, process needed for specially determining
Face, and determine that the axis acted when processing the face is compensation axis；
Step 2, according to processing compensation scheme, work out process of measurement, by numerical control machining center on-line measurement function to part
Machining benchmark carries out on-line measurement, and obtained dynamic variable data are automatically passed to save in the lathe parameter of setting；
Step 3, according to processing compensation scheme and in dynamic variable data, work out dynamic machining program, the dynamic machining program
Using dynamic variable data collected, Multi-axis simultaneous machining forms the dynamic machining program that adaptively can dynamically compensate, reaches
To profile-followed just curved purpose, to realize adaptive machining, it is ensured that part wall thickness or depth equidimension characteristic meet part processing
Quality requirement；
After step 4, part processing, the part size after processing is surveyed automatically by numerical control machining center on-line measurement function
Amount, is compared with the theoretical value of detail drawing, if part size is unqualified, feeds back to processing program, re-start processing；
Meanwhile in conjunction with tool life management, cutter access times or time, to knife, long, knife is mended, coordinate system or processing program compensate
Data are automatically corrected compensation, make program with self study self-compensating function, and can control the actual size section of part
Range, part size and processing quality after finally ensuring to process.
2. a kind of adaptive machining method based on numerically-controlled machine tool according to claim 1, which is characterized in that in step 2
The measurement scheme, the surface that measuring surface chooses the deformations such as type face, measurement datum, the non-interference surface changed greatly carry out
On-line measurement.
3. a kind of adaptive machining method based on numerically-controlled machine tool according to claim 1, which is characterized in that in step 2
The lathe parameter uses custom parameter.
4. a kind of adaptive machining method based on numerically-controlled machine tool according to claim 3, which is characterized in that in step 2
The specifically used GUD parameter of lathe parameter.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110434673A (en) * | 2019-08-21 | 2019-11-12 | 福建科烨数控科技有限公司 | A kind of method of lathe in machining component parameter real time correction |
| CN111007798A (en) * | 2019-12-17 | 2020-04-14 | 中国航发动力股份有限公司 | Self-adaptive numerical control machining method for forging and casting structural member |
| CN112051799A (en) * | 2020-09-10 | 2020-12-08 | 成都广泰威达数控技术股份有限公司 | Self-adaptive control method for machining |
| CN112059726A (en) * | 2020-08-31 | 2020-12-11 | 西安精雕精密机械工程有限公司 | On-machine measurement and compensation processing method of workpiece with multiple reference characteristics |
| CN112496863A (en) * | 2020-11-23 | 2021-03-16 | 中国航发沈阳黎明航空发动机有限责任公司 | Automatic measuring method for numerical control machining angle |
| CN112540567A (en) * | 2020-10-21 | 2021-03-23 | 吉林省齐智科技有限公司 | Online flexible measurement self-adaptive machining method for automobile mold |
| CN113009881A (en) * | 2021-01-27 | 2021-06-22 | 北京动力机械研究所 | Automatic setting and online measuring method for coordinate system in numerical control machining |
| CN114047698A (en) * | 2021-11-12 | 2022-02-15 | 中国航发沈阳黎明航空发动机有限责任公司 | Numerical control machine tool precision self-adaptive compensation method |
| CN114083351A (en) * | 2021-11-12 | 2022-02-25 | 中国航发沈阳黎明航空发动机有限责任公司 | Automatic measuring method for angle on equipment |
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| CN113009881A (en) * | 2021-01-27 | 2021-06-22 | 北京动力机械研究所 | Automatic setting and online measuring method for coordinate system in numerical control machining |
| CN114047698A (en) * | 2021-11-12 | 2022-02-15 | 中国航发沈阳黎明航空发动机有限责任公司 | Numerical control machine tool precision self-adaptive compensation method |
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