CN103336485B - Rapid generating method of milling path of web of airplane structural member - Google Patents
Rapid generating method of milling path of web of airplane structural member Download PDFInfo
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- 238000011112 process operation Methods 0.000 claims description 9
- 238000005520 cutting process Methods 0.000 claims description 6
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Abstract
A rapid generating method of the milling path of a web of an airplane structural member belongs to the technical field of CAM. The rapid generating method comprises the following steps: at first, clicking a web surface on which a tool path needs to be generated in a part model through a mouse in a CAM system, automatically constructing a milling area of the web of the clicked web surface, then selecting processing technology information of the clicked web surface automatically generated or manually inputted according to data in a process database, and achieving the rapid and automatic generation of the processing area and the processing path. The method is high in computing efficiency and strong in flexibility, reduces the programming workload of engineers, meanwhile, supports the batch processing to a single web surface and a plurality of web surfaces, and can meet different requirements of engineers.
Description
Technical field
The present invention relates to a kind of numerical-control processing method, especially a kind of automatic generation method of Milling Process track, specifically a kind of web of airplane structural Milling Process track rapid generation.
Background technology
As everyone knows, aircraft structure is the main load-carrying member of aircraft, comprises the structure types such as frame, beam, wallboard, and because aircraft structure crudy requires high, the process-cycle is short, mainly on high-grade, digitally controlled machine tools, carries out digital control processing.China's Aviation Manufacturing Enterprises is by technological transformation for many years, introduce and have developed a large amount of high value, the numerically-controlled machine of high use cost and support equipment, but the overall utilization of equipment is less than 40%, its one of the main reasons is exactly that the efficiency of numerical control programming is low, for large-scale integral structural member, the ratio of its programming time and machine tooling time reaches 7:1, causes the long-time waste of lathe ability.
The work of current Flight Structures NC Machining machining prgraming is mainly carried out on some commercializations CAM platform, as the CATIA of French Da Suo company, and the UG NX of Siemens, the Pro/E etc. of PTC.When using these softwares to carry out the establishment of job sequence, need manually to click a large amount of geometric element structure machining areas, a large amount of machined parameters is manually set, the workload of programming is very large, especially to have size large for aircraft structure, the feature that work flow is many, this programming mode very elapsed time; In addition, for reducing the take-off weight of aircraft, under the prerequisite ensureing design of part intensity, aircraft structure adopts uniform strength design usually, therefore in part, defines large amount of complex machining area, as dark narrow groove, closes chamfered groove etc., the machining area of these structures directly cannot obtain from part, need manually to calculate and create assisted geometric and build machining area, difficulty is high, workload is large, is also one of major reason affecting Flight Structures NC Machining programming; Moreover when manually programming, because human negligence, the human factor such as to lack experience make the less stable of Programming's quality, the later stage needs to carry out program optimization in conjunction with a large amount of simulation work, and causes program norm not enough, affects accumulation of knowledge.
Another programming mode is the automatic numerically controlled programming mode of feature based at present, the method is by automatically identifying the characteristic information in part, automatic structure machining area and Selecting All Parameters, realize the automatic generation of job sequence, but this technology is not used widely at present.First, feature identification technique is difficult to the automatic identification of covering all part features, especially this baroque part of aircraft structure, often there is None-identified, identify situation that is imperfect and identification error, quality due to recognition result is low, and to cause the quality of programming low, later stage still needs to carry out a large amount of manual repair work, and the general increase degree of programming efficiency is not high.Secondly, the automatic numerically controlled programming of feature based emphasizes integrated automation, prosthetic intervention in process, is often difficult to embody the rational subjective demand of engineering staff, and therefore dirigibility is poor.
Summary of the invention
The object of the invention is cannot adapt to complex structural member programming needs for existing CAM software, cause programming time long, and the web machining prgraming existence of existing feature based identifies that difficulty is large, needs manual intervention repairing to cause the problem that programming efficiency is not high, invent the web of airplane structural Milling Process track rapid generation that a kind of counting yield is high, dirigibility also can support by force single web and multiple web batch processing simultaneously.
Technical scheme of the present invention is:
A kind of web of airplane structural Milling Process track rapid generation, is characterized in that it comprises the following steps:
(1) under CAM environment, click web surface to be processed by mouse, obtain web surface row;
(2) with selected web surface for seed face, automatically build web Milling Process region;
(3) according to the data in technological data bank, adopt the method automatically and manually combined, carry out processing technology decision-making, obtain the processing method of selected web;
(4) web machining area and processing scheme are invested automatically process operation corresponding in CAM, generate cutter path fast.
Described web surface to be processed is obtained by the web surface in mouse click model, it supports choosing of single web surface and multiple web surface simultaneously, choosing not by position and the properties affect of web of web surface, is freely determined according to actual needs by operating personnel.
Described automatic structure web Milling Process region comprises the following steps:
1) extracting selected web surface in web surface row is respectively seed face, its outline and Internal periphery are extracted respectively, Internal periphery can be empty, deposit in OuterLoop and InnerLoop, OuterLoop corresponds to the intersection edges of web surface and broad sense side, and InnerLoop is corresponding to web surface and the intersection edges of hole (H) and island (I) on it; Broad sense side comprises side, corner plane and sagging face;
2) carry out joint face expansion with OuterLoop and InnerLoop in seed face, the face obtaining being connected with web surface arranges, and deposits in face row C respectively
outand C
in, and obtain wherein each with the connection attribute in seed face;
1. find the face adjacent with web surface according to limit each in OuterLoop and InnerLoop, characteristic face row C is deposited in these adjacent faces
outand C
inin;
2. C is obtained
outand C
inin each with corner degree and face angle formed by web surface, the conversion relations in what wherein corner degree represented is face and face, the position relationship in what face angle represented is face and face, if face angle is less than 180 degree, is recessed connection depending on two adjacent surfaces, otherwise is convex connection;
3) after the joint face row obtaining web surface, according to following web surface machining area decision rule or building method, automatically web Milling Process region is created; Web Milling Process region comprises: web surface (B), web surface processing border (Loop), end face (T), and wherein web surface (B) is clicked by mouse and obtains;
(1) for not containing the web surface of Internal periphery, namely InnerLoop is empty web surface, its machining area judgment rule or building method as follows:
The building method of end face T is as follows:
1. C is traveled through
outin all, find the face being less than 180 degree with the face angle of web surface, namely become the recessed face be connected with web surface, deposit in face row C
tin;
2. C is traveled through
tin all, find all middle distance web surface vertical ranges point P farthest
top, pass through P
topconstruct the face parallel with web surface as end face T.
The building method of web surface processing border Loop is as follows:
1. C is extracted
tin each, travel through all limits of each, find the limit not on this face adjacent side, web surface, and deposit in E
upin;
2. C is extracted
tin each, travel through all limits of each, find the limit on web surface, and deposit in E
downin;
3. E is traveled through
downeach limit, each edge web surface normal direction stretched, tensile elongation equals the distance of end face to web surface, and stretched face is stored in C
profilein;
4. C is taken out
profilein all, add web surface and end face, build a bounding box, by E
upin all limits be in extracting section in bounding box out, deposit in E
insidein;
5. by E
downin all limits and E
insidein all limits be projected on web surface, deposit in C respectively
edge1and C
edge2in, judge C
edge1all limits and C
edge2in all limits whether have intersection point; If there is intersection point to be stored in C
insectionin, appoint and get an intersection point,
Start to extract processing border Loop, method is as follows;
A) judge whether this intersection point has counterclockwise and belong to C
edge2limit, if then turn to step b), then turn to step c) if not; Counterclockwise press web normal direction right-hand rule to judge;
B) along this C
edge2while travel through, until to next intersection point, get back to step a);
C) along this C
edge1while travel through, until to next intersection point, get back to step a);
D) travel through back initial point of intersection along aforesaid way, by all traversed limits stored in Loop, as shown in Figure 7 always.
(2) for the web surface containing Internal periphery, due to the impact by inner island or internal holes, its machining area judgment rule or building method as follows:
The building method of Internal periphery end face (T) is as follows:
1. C is traveled through
inin all, find the face being less than 180 degree with the face angle of web surface, namely become the recessed face be connected with web surface, deposit in face row C
tin;
2. C is traveled through
tin all, find all middle distance web surface vertical ranges point P farthest
top, pass through P
topconstruct the face parallel with web surface as end face (T), this end face (T) and the end face (T) constructed by outer shroud are before compared, using distant for distance web surface one as final end face (T);
The defining method of web processing inner boundary Loop:
1. C is traveled through
inin all, find the face being greater than 180 degree with the face angle of web surface, namely become the convex face that is connected and hole sidewall with web surface, deposit in face row C
loopin;
2. C is traveled through
inin all, find and be less than 180 degree with the face angle of web surface and the non-vanishing face of corner degree and side, island, deposit in face row C
loopin;
2. face row C is extracted
loopin each, travel through all limits of each, find the limit on web surface, projected on web surface, by projecting, the limit that obtains is deposited in Loop.
4, method according to claim 1, is characterized in that described step (3) web Milling Process process decision method comprises cutter decision-making and cutting parameter and the content such as to determine:
1) cutter decision-making, comprise cutter length, tool radius, its defining method is:
1. extract the distance D of end face (T) to web surface (B), as the reference value that tool length d chooses, meet d >=D;
2. using the reference value that web processing border (Loop) mean curvature radius minimum value r chooses as tool radius R, r >=R is met;
3. from tool magazine, choose the cutter of two each and every one conditions more than meeting, if there is much knives tool to meet the demands simultaneously, manually determine which selects cutter by operating personnel;
2) determination of cutting parameter comprises cutting-in, cuts wide, tool path pattern, the speed of mainshaft and speed of feed; Corresponding defining method is as follows:
1. cutting-in, cut the decision-making of wide, feeding and rotating speed according to part material and previous step institute decision-making tool-information out, automatically extract from cutting-press shaping technique;
2. corresponding tool path pattern can be found from technological data bank, the machined parameters of advance and retreat cutter strategy needed for other.
Described web processing mode chooses corresponding process operation from CAM system, the formation geometric element of machining area and the result of process decision is automatically composed in process operation, generates the cutter path of web Milling Process.
Beneficial effect of the present invention:
First the present invention clicks in part model by mouse the web surface needing Tool-path Generation in CAM system, the machining area of web surface Milling Process selected by automatic structure, then according to the data in technological data bank, can select automatically to generate or the artificial processing technology information inputting selected web, realize the fast automatic generation of machining area and machining locus.
The present invention has that counting yield is high, dirigibility is strong, alleviates the programing work amount of engineering staff, supports single web and multiple web batch processing simultaneously, can meet the different demands of engineering staff.
Accompanying drawing explanation
Fig. 1 is web Milling Process track rapid generation process flow diagram of the present invention.
Fig. 2 is the schematic diagram in web Milling Process region of the present invention, wherein T is end face, B is the web surface of required processing, OuterLoop deposits web outline, InnerLoop deposits web Internal periphery, outline refers to the intersection edges in web surface and broad sense side (side, corner plane and sagging face etc.), and Internal periphery refers to web surface and the intersection edges of hole (H) and island (I) on it.
Fig. 3 is that the structure process flow diagram that middle characteristic face arranges is determined in web Milling Process region of the present invention.
Fig. 4 is the calculating schematic diagram of corner of the present invention degree and face angle, wherein f
1, f
2be two adjacent faces, e is intersection edges, p
midfor the mid point of intersection edges, n in A
1, n
2for adjacent surface f
1, f
2at p
midnormal vector, choose f
1, f
2middle any surface is reference field, chooses f here
1for reference field, determine the direction n of limit e according to right-hand rule
e, n
1to n
2angle be designated as θ, if θ > π, then corner degree is 2 π-θ, if θ < π, then corner degree is θ; N in B
1, n
2for adjacent surface f
1, f
2main normal direction, choose f equally
1for reference field, determine the direction n of limit e according to right-hand rule
e, n
1to n
2angle be designated as θ, if θ > π, then face angle is 2 π-θ, if θ < π, then face angle is θ.
Fig. 5 is outer shroud of the present invention processing boundary formation line drawing schematic diagram, wherein E
upthe sidewall sideline of using needed for processing border, E
downfor the intersection of sidewall and web surface.
Fig. 6 is structure bounding box schematic diagram of the present invention, E
insidefor being in sidewall outer portions needed for bounding box inside, E
downfor the intersection of sidewall and web surface.
Fig. 7 is that outer shroud of the present invention processing border builds schematic diagram, wherein C
edge1for E
insideprojection line on web surface, C
edge2for E
downprojection line on web surface, C
insectionfor C
edge1with C
edge2the intersection point on each limit, arrow is depicted as the direction on each limit, place.
Fig. 8 is processing border of the present invention schematic diagram, and wherein Loop is the inner and outer boundary of web Milling Process, and B is web, and T is end face.
Fig. 9 is web process tool of the present invention decision-making, and wherein D is the vertical range of end face to web surface, and R is radius-of-curvature minimum in web processing all limits, border, and d is tool length, and r is tool radius.
Figure 10 is that web Milling Process track of the present invention generates design sketch fast, and for the web milling of groove described in the embodiment of the present invention, its center line M is feed track, and line N is process tool track, and line O is withdrawing track, and line P is that interlayer moves cutter track.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further illustrated.
As Figure 1-10 shows.
A kind of web of airplane structural Milling Process track rapid generation, its process flow diagram as shown in Figure 1, comprises following steps:
First, under CAM environment, web surface to be processed is clicked by mouse, with the web surface chosen for seed face, carry out face to expand and obtain corresponding with web surface characteristic face row, then by corresponding rule, characteristic face row are mated and constructed, realize the automatic structure in web Milling Process region, as shown in Figure 2, then by process decision determination machined parameters; The result of the geometric element and process decision that form machining area is the most at last composed in CAM system in corresponding process operation automatically, generates the cutter path of web Milling Process.
Concrete implementation step can be divided into following components:
1, the choosing of web surface.
Web surface to be processed is obtained by the web surface in mouse click model, supports choosing of single web surface and multiple web surface simultaneously, and choosing not by position and the properties affect of web of web surface, is freely determined according to actual needs by operating personnel.
2, web Milling Process region builds automatically.
1) extracting selected web surface in web surface row is respectively seed face, its outline and Internal periphery (can be sky) are extracted respectively, as shown in Figure 2, deposit in OuterLoop and InnerLoop, OuterLoop corresponds to the intersection edges in web surface and broad sense side (side, corner plane and sagging face etc.), and InnerLoop is corresponding to web surface and the intersection edges on hole and island etc. on it;
2) carry out joint face expansion with OuterLoop and InnerLoop in seed face, the face obtaining being connected with web surface arranges, and deposits in face row C respectively
outand C
in, and obtain wherein each with the connection attribute in seed face;
1. find the face adjacent with web surface according to limit each in OuterLoop and InnerLoop, characteristic face row C as shown in Figure 3, is deposited in these adjacent faces by flow process
outand C
inin;
2. C is obtained
outand C
inin each with web surface formed by corner degree and face angle, the conversion relations in what wherein corner degree represented is face and face, the position relationship in what face angle represented is face and face, corresponding computing method as shown in Figure 4, if wherein face angle is less than 180 degree, be recessed connection depending on two adjacent surfaces, otherwise be convex connection.
3) after the joint face row obtaining web surface, according to following web surface machining area decision rule or building method, automatically web Milling Process region is created.Web Milling Process region comprises: web surface B, web surface processing border Loop, end face T, as shown in Figure 2.Wherein web surface B is clicked by mouse and obtains.
(1) for not containing the web surface of Internal periphery, namely InnerLoop is empty web surface, its machining area judgment rule or building method as follows:
The building method of end face T is as follows:
1. C is traveled through
outin all, find the face being less than 180 degree with the face angle of web surface, namely become the recessed face be connected with web surface, deposit in face row C
tin;
2. C is traveled through
tin all, find all middle distance web surface vertical ranges point P farthest
top, pass through P
topconstruct the face parallel with web surface as end face T.
The building method of web surface processing border Loop is as follows:
1. C is extracted
tin each, travel through all limits of each, find the limit not on this face adjacent side, web surface, and deposit in E
upin, as shown in Figure 5;
2. C is extracted
tin each, travel through all limits of each, find the limit on web surface, and deposit in E
downin, as shown in Figure 5;
3. E is traveled through
downeach limit, each edge web surface normal direction stretched, tensile elongation equals the distance of end face to web surface, and stretched face is stored in C
profilein, as shown in Figure 6;
4. C is taken out
profilein all, add web surface and end face, build a bounding box, by E
upin all limits be in extracting section in bounding box out, deposit in E
insidein, as shown in Figure 6;
5. by E
downin all limits and E
insidein all limits be projected on web surface, deposit in C respectively
edge1and C
edge2in, judge C
edge1all limits and C
edge2in all limits whether have intersection point; If there is intersection point to be stored in C
insectionin, appoint and get an intersection point, start to extract processing border Loop, as shown in Figure 7, method is as follows:
A) judge that this intersection point (counterclockwise judges by web normal direction right-hand rule) whether direction has to belong to C counterclockwise
edge2limit, if then turn to step b), then turn to step c) if not;
B) along this C
edge2while travel through, until to next intersection point, get back to step a);
C) along this C
edge1while travel through, until to next intersection point, get back to step a);
D) travel through back initial point of intersection along aforesaid way, by all traversed limits stored in Loop, as shown in Figure 7 always.
(2) for the web surface containing Internal periphery, due to the impact by inner island or internal holes, its web Milling Process region construction step is as follows:
The building method of Internal periphery end face T:
1. C is traveled through
inin all, find the face being less than 180 degree with the face angle of web surface, namely become the recessed face be connected with web surface, deposit in face row C
tin;
2. C is traveled through
tin all, find all middle distance web surface vertical ranges point P farthest
top, pass through P
topconstruct the face parallel with web surface as end face T, this end face T and the end face T constructed by outer shroud are before compared, using distant for distance web surface one as final end face T.
The extracting method of web processing inner boundary Loop:
1. C is traveled through
inin all, find the face being greater than 180 degree with the face angle of web surface, namely become the convex face (i.e. hole sidewall) be connected with web surface, deposit in face row C
loopin;
2. C is traveled through
inin all, find the face being less than 180 degree with the face angle of web surface, namely become the recessed face (i.e. side, island) be connected with web surface, deposit in face row C
loopin;
2. face row C is extracted
loopin each, travel through all limits of each, find the limit on web surface, projected on web surface, by projecting, the limit that obtains is deposited in Loop.
By above step, mouse can be realized and click the machining area that web surface generates web milling automatically, as shown in Figure 8.
3, according to the data in technological data bank, adopt the method automatically and manually combined, carry out processing technology decision-making, obtain the processing method of selected web surface.
1) web Milling Process process decision content comprises: cutter decision-making, cutting parameter is determined.
2) cutter decision-making, comprise cutter length, tool radius etc., its defining method is as follows:
1. extract the distance D of end face T to web surface B, as the reference value that tool length d chooses, meet d >=D;
2. using the reference value that web processing border Loop mean curvature radius minimum value r chooses as tool radius R, r >=R is met;
3. from tool magazine, choose the cutter of two each and every one conditions more than meeting, if there is much knives tool to meet the demands simultaneously, manually determine which selects cutter by operating personnel.
3) determination of cutting parameter comprises cutting-in, cuts wide, that tool path pattern, the speed of mainshaft and speed of feed etc. are necessary parameter.Corresponding defining method is as follows:
1. cutting-in, cut the decision-making of wide, feeding and rotating speed according to part material and previous step institute decision-making tool-information out, automatically extract from cutting-press shaping technique;
2. corresponding tool path pattern can be found from technological data bank, the machined parameters needed for other such as advance and retreat cutter strategy.
4, from CAM system, choose corresponding process operation according to web processing mode, the formation geometric element of machining area and the result of process decision are composed in process operation automatically, generate the cutter path of web Milling Process.As shown in Figure 10.
The part that the present invention does not relate to prior art that maybe can adopt all same as the prior art is realized.
Claims (3)
1. a web of airplane structural Milling Process track rapid generation, is characterized in that it comprises the following steps:
(1) under CAM environment, click web surface to be processed by mouse, obtain web surface row;
(2) with selected web surface for seed face, automatically build web Milling Process region; Described automatic structure web Milling Process region comprises the following steps:
1) extracting selected web surface in web surface row is respectively seed face, its outline and Internal periphery are extracted respectively, Internal periphery is empty, deposit in OuterLoop and InnerLoop, OuterLoop corresponds to the intersection edges of web surface and broad sense side, and InnerLoop is corresponding to web surface and the intersection edges of hole (H) and island (I) on it; Broad sense side comprises side, corner plane and sagging face;
2) carry out joint face expansion with OuterLoop and InnerLoop in seed face, the face obtaining being connected with web surface arranges, and deposits in face row C respectively
outand C
in, and obtain wherein each with the connection attribute in seed face;
1. find the face adjacent with web surface according to limit each in OuterLoop and InnerLoop, characteristic face row C is deposited in these adjacent faces
outand C
inin;
2. C is obtained
outand C
inin each with corner degree and face angle formed by web surface, the conversion relations in what wherein corner degree represented is face and face, the position relationship in what face angle represented is face and face, if face angle is less than 180 degree, is recessed connection depending on two adjacent surfaces, otherwise is convex connection;
3) after the joint face row obtaining web surface, according to following web surface machining area decision rule or building method, automatically web Milling Process region is created; Web Milling Process region comprises: web surface (B), web surface processing border (Loop), end face (T), and wherein web surface (B) is clicked by mouse and obtains;
(1) for not containing the web surface of Internal periphery, namely InnerLoop is empty web surface, its machining area judgment rule or building method as follows:
The building method of end face T is as follows:
1. C is traveled through
outin all, find the face being less than 180 degree with the face angle of web surface, namely become the recessed face be connected with web surface, deposit in face row C
tin;
2. C is traveled through
tin all, find all middle distance web surface vertical ranges point P farthest
top, pass through P
topconstruct the face parallel with web surface as end face T;
The building method of web surface processing border Loop is as follows:
1. C is extracted
tin each, travel through all limits of each, find the limit not on this face adjacent side, web surface, and deposit in E
upin;
2. C is extracted
tin each, travel through all limits of each, find the limit on web surface, and deposit in E
downin;
3. E is traveled through
downeach limit, each edge web surface normal direction stretched, tensile elongation equals the distance of end face to web surface, and stretched face is stored in C
profilein;
4. C is taken out
profilein all, add web surface and end face, build a bounding box, by E
upin all limits be in extracting section in bounding box out, deposit in E
insidein;
5. by E
downin all limits and E
insidein all limits be projected on web surface, deposit in C respectively
edge1and C
edge2in, judge C
edge1all limits and C
edge2in all limits whether have intersection point; If there is intersection point to be stored in C
insectionin, appoint and get an intersection point,
Start to extract processing border Loop, method is as follows;
A) judge whether this intersection point has counterclockwise and belong to C
edge2limit, if then turn to step b), then turn to step c if not); Counterclockwise press web normal direction right-hand rule to judge;
B) along this C
edge2while travel through, until to next intersection point, get back to step a);
C) along this C
edge1while travel through, until to next intersection point, get back to step a);
D) travel through back initial point of intersection along aforesaid way, by all traversed limits stored in Loop always;
(2) for the web surface containing Internal periphery, due to the impact by inner island or internal holes, its machining area judgment rule or building method as follows:
The building method of Internal periphery end face (T) is as follows:
1. C is traveled through
inin all, find the face being less than 180 degree with the face angle of web surface, namely become the recessed face be connected with web surface, deposit in face row C
tin;
2. C is traveled through
tin all, find all middle distance web surface vertical ranges point P farthest
top, pass through P
topconstruct the face parallel with web surface as end face (T), this end face (T) and the end face (T) constructed by outer shroud are before compared, using distant for distance web surface one as final end face (T);
The defining method of web processing inner boundary Loop:
1. C is traveled through
inin all, find the face being greater than 180 degree with the face angle of web surface, namely become the convex face that is connected and hole sidewall with web surface, deposit in face row C
loopin;
2. C is traveled through
inin all, find and be less than 180 degree with the face angle of web surface and the non-vanishing face of corner degree and side, island, deposit in face row C
loopin;
2. face row C is extracted
loopin each, travel through all limits of each, find the limit on web surface, projected on web surface, by projecting, the limit that obtains is deposited in Loop;
(3) according to the data in technological data bank, adopt the method automatically and manually combined, carry out processing technology decision-making, obtain the processing method of selected web; Described processing technology decision-making technique comprises the determination of cutter decision-making and cutting parameter:
1) cutter decision-making, comprise cutter length, tool radius, its defining method is:
1. extract the distance D of end face (T) to web surface (B), as the reference value that tool length d chooses, meet d >=D;
2. using the reference value that web processing border (Loop) mean curvature radius minimum value r chooses as tool radius R, r >=R is met;
3. from tool magazine, choose the cutter of two each and every one conditions more than meeting, if there is much knives tool to meet the demands simultaneously, manually determine which selects cutter by operating personnel;
2) determination of cutting parameter comprises cutting-in, cuts wide, tool path pattern, the speed of mainshaft and speed of feed; Corresponding defining method is as follows:
1. cutting-in, cut the decision-making of wide, feeding and rotating speed according to part material and previous step institute decision-making tool-information out, automatically extract from cutting-press shaping technique;
2. corresponding tool path pattern can be found from technological data bank, the machined parameters of advance and retreat cutter strategy needed for other;
(4) web machining area and processing scheme are invested automatically process operation corresponding in CAM, generate cutter path fast.
2. method according to claim 1, it is characterized in that described web surface to be processed is obtained by the web surface in mouse click model, it supports choosing of single web surface and multiple web surface simultaneously, choosing not by position and the properties affect of web of web surface.
3. method according to claim 1, it is characterized in that described web processing mode chooses corresponding process operation from CAM system, the formation geometric element of machining area and the result of process decision are composed in process operation automatically, generates the cutter path of web Milling Process.
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| CN109858370B (en) * | 2018-12-29 | 2021-06-15 | 武汉开目信息技术股份有限公司 | Method and device for identifying part of machining surface in three-dimensional model of part |
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