CN104898570A - Automatic web plate processing unit constructing method based on boundary extension - Google Patents
Automatic web plate processing unit constructing method based on boundary extension Download PDFInfo
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- CN104898570A CN104898570A CN201510141698.3A CN201510141698A CN104898570A CN 104898570 A CN104898570 A CN 104898570A CN 201510141698 A CN201510141698 A CN 201510141698A CN 104898570 A CN104898570 A CN 104898570A
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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
- G05B19/4093—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 part programming, e.g. entry of geometrical information as taken from a technical drawing, combining this with machining and material information to obtain control information, named part programme, for the NC machine
- G05B19/40937—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 part programming, e.g. entry of geometrical information as taken from a technical drawing, combining this with machining and material information to obtain control information, named part programme, for the NC machine concerning programming of machining or material parameters, pocket machining
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Abstract
The invention provides an automatic web plate processing unit constructing method based on boundary extension. Extension is firstly carried out on an inner boundary and an outer boundary of a web plate surface, and a soft boundary is ensured to be effectively processed; then, a cavity boundary where the web plate surface is located is used for carrying out restriction on a web plate processing region after extension, and over-cut of a hard boundary can be avoided; and finally, surface region combination is carried out on restriction surfaces of multiple web plates existing in the cavity, and repeated processing can be avoided. The method of the invention can be applied to reconstruction of a groove processing guide element of any web plate, the web plate processing unit can be automatically constructed, a key foundation is laid for quick programming of the web plate, the web plate programming efficient is improved, and workload of a technologist is reduced significantly.
Description
Technical field
The present invention relates to a kind of web machining cell method for automatically constructing based on boundary extension, for the fast programming of web of airplane structural, belong to aircraft digital manufacturing technology field.
Background technology
There is a large amount of web surfaces in large-scale integral structural member, need to carry out a large amount of interactive operations during these feature finishing programming, comprise the structure of geometric element, the setting of operation step parameter.For this reason, need the automatization level improving web of airplane structural programming badly, and web machining cell automatically to construct be the key automatically generating web process operation.
Summary of the invention
The invention provides a kind of web machining cell method for automatically constructing based on boundary extension, unit is led in the processing that the method can be used for automatically constructing web feature, and it can be used as pocket machining to operate lead element, the cutter rail generated can ensure that web feature is effectively processed, and avoids web to process generation and remains, interfere and cross problems such as cutting.
Main thought of the present invention is the border by overall continuation web surface, then is retrained by bounds, avoids adding producing man-hour and cuts, and ensures that the every bit on soft border all can be processed.
The object of the invention is to be achieved through the following technical solutions;
Based on a web machining cell method for automatically constructing for boundary extension, its key step is as follows:
(1) border is expanded: by the inner ring of web surface and outer shroud all biased tool diameters outside web surface, form new inner ring and outer shroud, form new region to be processed, realize the continuation of web surface by these new rings;
(2) bounds constraint: utilize the die cavity border at web place to the web surface after continuation, retrain, prevent from producing in the bounds of die cavity cutting;
(3) territory, face combination: be in same floor height, may there is multiple web surface, after continuation, may exist crossing between two, merge the territory, face after these continuation, avoids repeating processing;
(4) machining cell structure: processing is led unit and combine with cutting parameter, advance and retreat cutter parameter, form machining cell.
The concrete steps that described step (1) border is expanded are as follows:
Known cutter t, radius is r
t, web surface territory w=(l
o, { l
i1, l
i2..., l
in), wherein l
ofor the outer shroud of w, l
i1, l
i2..., l
inbe the inner ring of w.By l
o, l
i1, l
i2..., l
inbecome many baseline chains according to sequence structure, be set to E
b1, E
b2..., E
bn, wherein E
b1middle conductor sequence is store counterclockwise, E
b2..., E
bnmiddle conductor sequence is store clockwise, and n is inner ring number;
(1.1) outer shroud l
ocontinuation: with radius r '=2r
tcutter round as a ball, be positioned over baseline chain E
b1right side and press roll counter-clockwise, form distance linear chain E
d1;
(1.2) inner ring l
i1, l
i2..., l
incontinuation: similar to outer shroud continuation, with radius r '=2r
tcutter round as a ball, be positioned over baseline chain E respectively
b2..., E
bnright side and by rolling clockwise, generation apart from linear chain sequence be E
d2, E
d3..., E
dm, m>0, owing to may produce from giving degeneration, the number m apart from linear chain in linear chain sequence needs not be equal to baseline chain number n;
(1.3) territory, face reconstruct: with E
d1for outer shroud, E
d2, E
d3..., E
dmfor inner ring, build territory, continuation face f
v, realize the reconstruct of territory, face f.
Described step (2) bounds constraint meets following rule:
If under given cutter, profile border and border, island prerequisite, machinable a series of mutually disjoint the territory of cutter is called can territory, work face collection, is expressed as F
a;
F
ain be called can territory, work face in each territory, be expressed as f
a=(e
c, { e
i1, e
i2, e
i3..., e
in), wherein, e
cfor profile border, e
i1, e
i2, e
i3..., e
infor border, island, e
cand e
i1, e
i2, e
i3..., e
inall effect of contraction is existed to web surface processing, web surface can be avoided to produce and cut and interfere;
Concrete constraint rule is:
(2.1) set web process tool as t, can integrate as F in territory, work face
a={ f
a1, f
a2..., f
am, m>1, web surface territory is the territory, expansion face of f, f is f
vif existed
then use f
aito f
vretrain, get f
j=f
ai∩ f
vouter shroud lead unit as the profile that pocket machining operates, inner ring leads unit as the island that pocket machining operates.
Described step (3) territory, face combination meets following rule:
When there is multiple web surface in same die cavity, what different web surface was formed after boundary extension lead unit may exist crossing, combines there is the containment surfaces territory of intersecting, and new leads unit to form;
Territory, concrete face rule of combination is as follows:
(3.1) set the web surface sequence that comprises in die cavity as w
1, w
2... w
n, web surface w
i, w
jcorresponding containment surfaces territory is respectively f
i, f
j, 1≤i≤n, 1≤j≤n and i≤j, if
then get f
i=f
i∪ f
j, and from w
1, w
2... w
nin remove w
j, realize web surface w
i, w
jmerging;
(3.2) the web surface sequence w in die cavity is merged according to rule (3.1)
1, w
2... w
n, form new web surface sequence w
1', w
2'... w
n', m≤n, then w
1', w
2'... w
n'meet the following conditions:
1≤i≤m, 1≤j≤m and i≤j, and process w
i'profile to lead unit be f
iouter shroud, it is f that unit is led on island
iinner ring.
Beneficial effect of the present invention: the method that the present invention proposes is applicable to the automatic structure realizing dissimilar web surface machining cell, mainly realize the automatic structure that unit is led in web processing, comprise fully hard border web surface, complete soft border web surface and soft or hard border mixing web surface, thering is provided gordian technique basis for realizing web fast programming, shortening web of airplane structural programming efficiency.The work workload of remarkable reduction technique person.Application the method, can realize web of airplane structural machining cell structure, for web of airplane structural fast programming provides technical foundation, thus improves web programming efficiency.
Accompanying drawing explanation
Fig. 1 is aircraft structure typical case web surface schematic diagram.
Fig. 2 is web outer shroud boundary extension schematic diagram.
Fig. 3 (a) to Fig. 3 (c) is the bounds constraint process schematic based on die cavity border.
The profile generated after the combination of Fig. 4 (a) to Fig. 4 (c) containment surfaces territory leads first process schematic.
Fig. 5 is overall flow figure of the present invention.
Embodiment
The present invention is based upon on CAD/CAM system platform, realizes a kind of method that web of airplane structural machining cell constructs automatically.
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail.
Based on a web machining cell method for automatically constructing for boundary extension, its key step is as follows: (1) border is expanded; (2) bounds constraint; (3) territory, face combination; (4) machining cell structure.
The specific implementation process of above-mentioned steps is as follows:
(1) border is expanded: known cutter t, radius is r
t, web surface territory w=(l
o, { l
i1, l
i2..., l
in), wherein l
ofor the outer shroud of w, l
i1, l
i2..., l
inbe the inner ring of w.By l
o, l
i1, l
i2..., l
inbecome many baseline chains according to sequence structure, be set to E
b1, E
b2..., E
bn, wherein E
b1middle conductor sequence is store counterclockwise, E
b2..., E
bnmiddle conductor sequence is store clockwise, and n is inner ring number, then boundary extension step is as follows:
(1.1) outer shroud l
ocontinuation: with radius r '=2r
tcutter round as a ball, be positioned over baseline chain E
b1right side and press roll counter-clockwise, form distance linear chain E
d1.Web surface outer shroud shown in Fig. 1, the distance linear chain generated by spheronization as shown in Figure 2.
(1.2) inner ring l
i1, l
i2..., l
incontinuation: similar to outer shroud continuation, with radius r '=2r
tcutter round as a ball, be positioned over baseline chain E respectively
b2..., E
bnright side and by rolling clockwise, generation apart from linear chain sequence be E
d2, E
d3..., E
dm, m>0, owing to may produce from giving degeneration, the number m apart from linear chain in linear chain sequence needs not be equal to baseline chain number n.
(3) territory, face reconstruct: with E
d1for outer shroud, E
d2, E
d3..., E
dmfor inner ring, build territory, continuation face f
v, realize the reconstruct of territory, face f.
(2) bounds constraint
Under given cutter, profile border and border, island prerequisite, machinable a series of mutually disjoint the territory of cutter is called can territory, work face collection, is expressed as F
a, F
ain be called can territory, work face in each territory, be expressed as f
a=(e
c, { e
i1, e
i2, e
i3..., e
in), wherein, e
cfor profile border, e
i1, e
i2, e
i3..., e
infor border, island, e
cand e
i1, e
i2, e
i3..., e
inall there is effect of contraction to web surface processing, web surface can be avoided to produce and cut and interfere, constraint rule is as follows:
Rule 1 sets web process tool as t, can integrate as F in territory, work face
a={ f
a1, f
a2..., f
am, m>1, web surface territory is the territory, expansion face of f, f is f
vif existed
then use f
aito f
vretrain, get f
j=f
ai∩ f
vouter shroud lead unit as the profile that pocket machining operates, inner ring leads unit as the island that pocket machining operates.The territory, continuation face in Fig. 1 median ventral plate face is f
v(Fig. 3 (a)), containment surfaces territory
(Fig. 3 (b)), then the outer shroud getting f leads unit (Fig. 3 (c)) as profile, realizes the continuation on constraint to bounds and soft border.
(3) territory, face combination
Multiple web surface may be there is in same die cavity, also may without web surface.If there is multiple web surface, then each web surface is inevitable coincides with the bottom surface of straight territory unit.If there is multiple web surface in same die cavity, each web surface is built and leads unit, and unit will be led be set to during slot machining operates and carry out web programming.But what different web surface was formed after boundary extension lead unit may exist crossing, and intersecting area must cause repeating processing.Therefore, combining there is the containment surfaces territory of intersecting, new leading unit to form, avoiding repeating to process.For this reason, following rule is set up:
Rule 2 sets the web surface sequence that comprises in die cavity as w
1, w
2... w
n, web surface w
i, w
jcorresponding containment surfaces territory is respectively f
i, f
j, 1≤i≤n, 1≤j≤n and i≤j, if
then get f
i=f
i∪ f
j, and from w
1, w
2... w
nin remove w
j, realize web surface w
i, w
jmerging.
Rule 3 and web surface sequence w die cavity in 2-in-1 according to rule
1, w
2... w
n, form new web surface sequence w
1', w
2'... w
n', m≤n, then w
1', w
2'... w
n'meet the following conditions:
1≤i≤m, 1≤j≤m and i≤j, and process w
i'profile to lead unit be f
iouter shroud, it is f that unit is led on island
iinner ring.As shown in Figure 4, two web surface w of a die cavity are belonged to
1, w
2, its territory, face is respectively w
1', w
2'(Fig. 4 (a)), containment surfaces territory is f
1, f
2and
(Fig. 4 (b)), according to rule, 2-in-1 and containment surfaces territory realizes the combination of web surface, generates new web surface w
1', according to rule 3, known processing w
1'profile lead unit as shown in Fig. 4 (c).
(4) machining cell structure
Finally, the processing formed is led unit and combine with manually given cutting parameter, advance and retreat cutter parameter in die cavity, form die cavity web machining cell, as the core data that web process operation generates, for web feature fast programming establishes key foundation.
The present embodiment implements under premised on invention technical scheme, give detailed embodiment and concrete implementation procedure, but protection scope of the present invention is not limited to following embodiment.
Claims (4)
1., based on a web machining cell method for automatically constructing for boundary extension, it is characterized in that, key step is as follows:
(1) border is expanded: by the inner ring of web surface and outer shroud all biased tool diameters outside web surface, form new inner ring and outer shroud, form new region to be processed, realize the continuation of web surface by these new rings;
(2) bounds constraint: utilize the die cavity border at web place to the web surface after continuation, retrain, prevent from producing in the bounds of die cavity cutting;
(3) territory, face combination: be in same floor height, may there is multiple web surface, after continuation, may exist crossing between two, merge the territory, face after these continuation, avoids repeating processing;
(4) machining cell structure: processing is led unit and combine with cutting parameter, advance and retreat cutter parameter, form machining cell.
2. a kind of web machining cell method for automatically constructing based on boundary extension according to claim 1, is characterized in that, the concrete steps that described step (1) border is expanded are as follows:
Known cutter t, radius is r
t, web surface territory w=(l
o, { l
i1, l
i2..., l
in), wherein l
ofor the outer shroud of w, l
i1, l
i2..., l
inbe the inner ring of w.By l
o, l
i1, l
i2..., l
inbecome many baseline chains according to sequence structure, be set to E
b1, E
b2..., E
bn, wherein E
b1middle conductor sequence is store counterclockwise, E
b2..., E
bnmiddle conductor sequence is store clockwise, and n is inner ring number;
(1.1) outer shroud l
ocontinuation: with radius r '=2r
tcutter round as a ball, be positioned over baseline chain E
b1right side and press roll counter-clockwise, form distance linear chain E
d1;
(1.2) inner ring l
i1, l
i2..., l
incontinuation: similar to outer shroud continuation, with radius r '=2r
tcutter round as a ball, be positioned over baseline chain E respectively
b2..., E
bnright side and by rolling clockwise, generation apart from linear chain sequence be E
d2, E
d3..., E
dm, m>0, owing to may produce from giving degeneration, the number m apart from linear chain in linear chain sequence needs not be equal to baseline chain number n;
(1.3) territory, face reconstruct: with E
d1for outer shroud, E
d2, E
d3..., E
dmfor inner ring, build territory, continuation face f
v, realize the reconstruct of territory, face f.
3. a kind of web machining cell method for automatically constructing based on boundary extension according to claim 1, is characterized in that, described step (2) bounds constraint meets following rule:
If under given cutter, profile border and border, island prerequisite, machinable a series of mutually disjoint the territory of cutter is called can territory, work face collection, is expressed as F
a;
F
ain be called can territory, work face in each territory, be expressed as f
a=(e
c, { e
i1, e
i2, e
i3..., e
in), wherein, e
cfor profile border, e
i1, e
i2, e
i3..., e
infor border, island, e
cand e
i1, e
i2, e
i3..., e
inall effect of contraction is existed to web surface processing, web surface can be avoided to produce and cut and interfere;
Concrete constraint rule is:
(2.1) set web process tool as t, can integrate as F in territory, work face
a={ f
a1, f
a2..., f
am, m>1, web surface territory is the territory, expansion face of f, f is f
vif existed
then use f
aito f
vretrain, get f
j=f
ai∩ f
vouter shroud lead unit as the profile that pocket machining operates, inner ring leads unit as the island that pocket machining operates.
4. a kind of web machining cell method for automatically constructing based on boundary extension according to claim 1, is characterized in that, described step (3) territory, face combination meets following rule:
When there is multiple web surface in same die cavity, what different web surface was formed after boundary extension lead unit may exist crossing, combines there is the containment surfaces territory of intersecting, and new leads unit to form;
Territory, concrete face rule of combination is as follows:
(3.1) set the web surface sequence that comprises in die cavity as w
1, w
2... w
n, web surface w
i, w
jcorresponding containment surfaces territory is respectively f
i, f
j, 1≤i≤n, 1≤j≤n and i≤j, if
then get
and from w
1, w
2... w
nin remove w
j, realize web surface w
i, w
jmerging;
(3.2) the web surface sequence w in die cavity is merged according to rule (3.1)
1, w
2... w
n, form new web surface sequence w
1', w
2'... w
n', m≤n, then w
1', w
2'... w
n'meet the following conditions:
1≤i≤m, 1≤j≤m and i≤j, and process w
i'profile to lead unit be f
iouter shroud, it is f that unit is led on island
iinner ring.
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CN105739433A (en) * | 2016-03-18 | 2016-07-06 | 沈阳飞机工业(集团)有限公司 | Cavity triaxial machinable area automatic construction method based on secondary spheronization method |
CN107350528A (en) * | 2017-09-18 | 2017-11-17 | 沈阳飞机工业(集团)有限公司 | Corner inserts the slotting milling point position construction method of Milling Machining |
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