CN108319796A - A kind of Fast design method of ruled surface - Google Patents
A kind of Fast design method of ruled surface Download PDFInfo
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- CN108319796A CN108319796A CN201810182045.3A CN201810182045A CN108319796A CN 108319796 A CN108319796 A CN 108319796A CN 201810182045 A CN201810182045 A CN 201810182045A CN 108319796 A CN108319796 A CN 108319796A
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
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Abstract
The invention discloses a kind of Fast design methods of ruled surface, identify two sections of curve chains of ruled surface first, sort and the starting that curve chain is arranged generates line；Then number parameter or parameter of curve are selected, ruled surface is quickly generated；Then according to the ruled surface that needs generate, ruled surface modification is carried out：Finally cycle carries out next round ruled surface design, until generating whole ruled surfaces on two sections of curve chains.Ruled surface Fast design method provided by the invention enables two sections of curve chains progress ruled surfaces of cad tools pair quickly to design, it solves cumbersome in ruled surface design process, the low problem of design efficiency, the rapid modeling for solving the problems, such as ruled surface design improves continuity and the flexibility of ruled surface design.
Description
Technical field
The invention belongs to Computer-aided Design Technology field, more particularly to a kind of ruled surface (ruled face) it is quick
Design method.
Background technology
With the fast development of computer technology, three-dimensional machinery graphics software function is become stronger day by day, and is carried out using cad technique
Product draws, models, it is more and more common to assemble.Cad technique has been widely used in the every field of engineering design, becomes raising
Product design efficiency, the important technical reinforced design standard, shorten the design cycle.
In CAD, ruled surface is a kind of important basic geometric curved surfaces, indicates family of curves to another
The set for one group of point that race's curve place is inswept.In the design of current ruled surface, it is primarily present following shortcoming：
(1) in general ruled surface design process, all curves in trade-off curve group respectively, curve group-select operation are needed
It is cumbersome；
(2) in general ruled surface design process, design process is discontinuous, and efficiency is low, and it is fast to cannot be satisfied ruled surface design
The requirement of run-up mould.
Generally speaking, existing computer-implemented method can be designed by ruled surface, but its presence is set
Problem cumbersome, that efficiency is low is counted, generation ruled surface can not be quickly designed.
Invention content
In order to solve the above technical problem, the present invention provides a kind of ruled surface Fast design methods.
The technical solution adopted in the present invention is：A kind of Fast design method of ruled surface, which is characterized in that including following
Step：
Step 1：Two sections of curve chains for identifying ruled surface, sort and the starting that curve chain is arranged generates line；
Specifically include following sub-step：
Step 1.1：Obtain the curve quantity, each curve location, each curve head and the tail endpoint of two sections of curve chains；
Step 1.2：It is whether single continuous to obtain two sections of curve chains；
If so, being sorted to curve according to the order of connection of curve；
If it is not, curve chain is then revised as single continuous curve chain, sort to curve further according to the order of connection of curve；
Step 1.3：The starting that curve chain is arranged generates line；
Step 2：Number parameter or parameter of curve are selected, ruled surface is quickly generated；
Step 3：The ruled surface generated as needed carries out ruled surface modification：
Step 4：Cycle carries out step 2 and 3, carries out next round ruled surface design, until being generated all on two sections of curve chains
Ruled surface.
Preferably, in step 1.2, curve chain it is single it is continuous refer to curve chain be full curve, and curve chain regardless of
Fork.
Preferably, generating the specific implementation process of ruled surface described in step 2 is：The curve that two sections of sequences are completed
Chain originates the start line for generating line or having progressed to according to what step 1.3 selected, is constituted according to the curve number parameter of input
It is currently generated the curve group of ruled surface, carries out curve group matching, ruled surface is generated, then currently proceeds to next line segment of curve
The start line of ruled surface is generated for next round.
Preferably, generating the specific implementation process of ruled surface described in step 2 is：Pass through trade-off curve group termination line
Section, the curve chain that two sections of sequences are completed, the start line that the starting according to step 1.3 selection generates line or has progressed to, root
According to the curve group for terminating line segment and constituting of selection, curve group matching is carried out, ruled surface is generated, then currently proceeds to the next of curve
Line segment is the start line that next round generates ruled surface.
Preferably, in ruled surface generating process, start line is carried out since last round of next curve for terminating line segment
Ruled surface design need to only select the curve number parameter after start line or terminate line segment this parameter of curve, and selection terminates line segment must
It must be the curve not proceeded in curve chain, not have to distinguish in two sections of curve end stopping of chain line segment selection courses.
Preferably, in step 2, in ruled surface generating process, current ruled surface is by by selecting number parameter or curve
The curve group matching life that parameter is constituted.
Preferably, the specific implementation process of the modification of ruled surface described in step 3 is：It is right according to ruled surface design requirement
Straight grain delete and then is redesigned, then at start line when start line comes back to epicycle step 2.
Preferably, the specific implementation process of the modification of ruled surface described in step 3 is：According to ruled surface design requirement and work as
Previous existence is reversed by current ruled surface at situation.
Ruled surface Fast design method provided by the invention enable two sections of curve chains of cad tools pair into
Row ruled surface quickly designs, and solves cumbersome in ruled surface design process, and the low problem of design efficiency solves ruled surface
The rapid modeling problem of design improves continuity and the flexibility of ruled surface design.
Description of the drawings
Fig. 1 is to generate the flow chart of ruled surface the first round of the embodiment of the present invention；
Fig. 2 is to generate the schematic diagram of ruled surface the first round of the embodiment of the present invention；
Fig. 3 is the first round of the embodiment of the present invention into the flow chart for identifying curve chain in ruled surface；
Fig. 4 is that the next round of the embodiment of the present invention generates the flow chart of ruled surface；
Fig. 5 is that the next round of the embodiment of the present invention generates the schematic diagram of ruled surface；
Fig. 6 is the overall flow figure of the ruled surface Fast design method of the embodiment of the present invention；
Fig. 7 is the operation interface schematic diagram that the ruled surface of the embodiment of the present invention quickly designs；
Fig. 8 is the model schematic that the ruled surface of the embodiment of the present invention quickly designs.
Specific implementation mode
Understand for the ease of those of ordinary skill in the art and implement the present invention, with reference to the accompanying drawings and embodiments to this hair
It is bright to be described in further detail, it should be understood that implementation example described herein is merely to illustrate and explain the present invention, not
For limiting the present invention.
A kind of ruled surface Fast design method of the present invention is as cad tools plug-in (plug-in) or mould
Block is arranged in pairs or groups with tool and is operated.The cad tools that the present embodiment uses is UG NX (Unigraphics NX, interaction
Formula computer aided design and manufacture three-dimensional software).
A kind of Fast design method of ruled surface provided by the invention, includes the following steps：
Step 1：Two sections of curve chains for identifying ruled surface, sort and the starting that curve chain is arranged generates line；
Specifically include following sub-step：
Step 1.1：Obtain the curve quantity, each curve location, each curve head and the tail endpoint of two sections of curve chains；
Step 1.2：It is whether single continuous to obtain two sections of curve chains；
If so, being sorted to curve according to the order of connection of curve；
If it is not, curve chain is then revised as single continuous curve chain, sort to curve further according to the order of connection of curve；
Step 1.3：The starting that curve chain is arranged generates line；
Step 2：Number parameter or parameter of curve are selected, ruled surface is quickly generated；
Step 3：The ruled surface generated as needed carries out ruled surface modification：
Step 4：Cycle carries out step 2 and 3, carries out next round ruled surface design, until being generated all on two sections of curve chains
Ruled surface.
As shown in Figure 1, generating the flow chart of ruled surface for the first round of the embodiment of the present invention.Its main flow is identification straight grain
Two sections of curve chains in face simultaneously sort, and setting starting generates money；Number parameter or parameter of curve are selected, ruled surface is quickly generated；Root
According to the ruled surface that needs generate, ruled surface modification is carried out.
In Step11, with according to two sections of curve chains for reading ruled surface, being identified according to the reading of curve chain, curve chain being carried out
Sequence, and each selected curve generates line as starting, can be described in detail behind detailed process.
In Step12, by the quantity of trade-off curve, generates line from starting and count, according to curve quantity, to be worked as
Two curve groups are gone to match, to generate ruled surface by the two curve groups that preceding ruled surface generates；Or directly select ruled surface
The termination line segment to be proceeded to is matched then from initial segment to the two line group of song for terminating line segment composition, straight to generate
Line face.It is important to note that next line segment for currently proceeding to curve is the start line that next round generates ruled surface.
In Step13, situation is currently generated according to ruled surface design requirement, reverse operating or deletion are carried out to ruled surface, from
And it modifies to ruled surface.It is important to note that start line comes back to start line when designing this ruled surface at this time
Place if curve chain all generates ruled surface, does not enter next round in special circumstances.
During the embodiment first round generates ruled surface, Fig. 2 is the schematic diagram of Fig. 1 ruled surface Fast design methods.According to
Shown in Fig. 2, curve chain A has curve a1, a2 ... ... that curves is waited to constitute, and curve chain B has curve b1, b2 ... ... that curves is waited to constitute.
In practical operation, curve chain A, curve chain B are identified, and are stored according to its order of connection.
By taking curve chain A, curve chain B as an example, ruled surface design is carried out, it is bent in 3 curve chain B of trade-off curve chain A curves quantity
Line number amount 2 either trade-off curve chain A the 3rd article of line segment be terminate line segment, curve chain B the 2nd article of line segment be terminate line segment, then
Curve group A1, B1 of composition generates ruled surface AB1 according to match condition.It is important to note that terminating line segment in selection
The curve chain where selection termination line segment is needed not distinguish between in the process, and is directly adjusted automatically in curve group generating process,
To simplify design cycle.
During the embodiment first round generates ruled surface, Fig. 3 is identification curve chain in Fig. 1 ruled surface Fast design methods
Flow chart.According to Fig.3, two sections of curve chains of ruled surface are identified and are sorted, the process that setting starting generates line can be divided into 3
Step obtains the curve quantity, each curve location, each curve head and the tail endpoint of two sections of curve chains in i.e. Step11.1；Step11.2
It is middle that the curve in two sections of curve chains is ranked up respectively, including obtain two sections of curve chains it is whether single it is continuous, according to curve
The order of connection sorts to curve；The starting that curve chain is arranged in Step11.3 generates line.According to the above process, to straight to not meeting
The curve chain of line face design requirement is excluded, suitable according to connecting according to the matching etc. of head and the tail endpoint to the curve in curve chain
Sequence is ranked up, it should be noted that in the present invention, this identification, sequence are all automatically generated.
As shown in figure 4, being the flow chart that next round of the embodiment of the present invention generates ruled surface.After its main flow and the first round
Two steps are the same, and Step21 selects number parameter or parameter of curve, quickly generates ruled surface；The straight grain that Step22 is generated as needed
Face carries out ruled surface modification.Uniquely difference lies in judging on two sections of curve chains whether all to generate ruled surface, behind detailed process
It can be described in detail.
During embodiment next round generates ruled surface, Fig. 5 is the schematic diagram of Fig. 4 ruled surface Fast design methods.According to
Shown in Fig. 5, curve chain A has curve a1, a2 ... ... that curves is waited to constitute, and curve chain B has curve b1, b2 ... ... that curves is waited to constitute.
But in the curve group newly constituted is constituted, subsequent curve group is as start line from next line segment of curve is proceeded to
It counts, and is to exclude the curve for having generated ruled surface when selection terminates line segment.
By taking curve chain A, curve chain B as an example, ruled surface design is further carried out, in 4 curve of trade-off curve chain A curves quantity
Chain B curves quantity 6 either trade-off curve chain A the 7th article of line segment be terminate line segment, curve chain B the 8th article of line segment be terminated line
Section, then curve group A2, B2 constituted generate ruled surface AB2 according to match condition.
During embodiment next round generates ruled surface, Fig. 6 is the whole flow process figure of ruled surface Fast design method.That is root
It according to two sections of curve chains for identifying ruled surface and sorts, setting starting generates money；Number parameter or parameter of curve are selected, is quickly generated
Ruled surface；The ruled surface generated as needed, judgement are all progress ruled surface modifications.It is jumped to if without modification next
Step is currently generated situation if modification according to ruled surface design requirement, reverse operating or deletion is carried out to ruled surface, to right
Ruled surface is modified.After generating ruled surface, judge whether all generate ruled surface on two sections of curve chains, if it is not,
Trade-off curve quantity terminates line segment generation ruled surface, further generates ruled surface, to the last all generates ruled surfaces.
As shown in fig. 7, it is the operation interface schematic diagram that the ruled surface of embodiment according to the present invention quickly designs.Operating space
1 is initially generated line area for identification, sequence and the setting of curve chain, by trade-off curve chain A successively, curve chain B, on realizing
State process；Operating space 2 is that ruled surface generation is gone, and by selecting number parameter or parameter of curve, ruled surface is quickly generated, according to choosing
The quantity of curve chain A, curve chain B are selected, ruled surface is carried out and is sequentially generated design, or line segment is terminated by selection, carry out straight grain
Face selection generates design；Operating space 3 is that ruled surface changes area, situation is currently generated according to ruled surface design requirement, to ruled surface
Reverse operating or deletion are carried out, to modify to ruled surface.
As shown in figure 8, it is the model schematic that the ruled surface of embodiment according to the present invention quickly designs.Wherein ruled surface
According to two closed line chain A, line chain B, by identification line chain, sequence and be arranged and be initially generated line, then by being sequentially generated or
Selection generates, and finally changes, and constantly quickly design obtains step by step.
It should be understood that the part that this specification does not elaborate belongs to the prior art.
It should be understood that the above-mentioned description for preferred embodiment is more detailed, can not therefore be considered to this
The limitation of invention patent protection range, those skilled in the art under the inspiration of the present invention, are not departing from power of the present invention
Profit requires under protected ambit, can also make replacement or deformation, each fall within protection scope of the present invention, this hair
It is bright range is claimed to be determined by the appended claims.
Claims (9)
1. a kind of Fast design method of ruled surface, which is characterized in that include the following steps：
Step 1：Two sections of curve chains for identifying ruled surface, sort and the starting that curve chain is arranged generates line；
Specifically include following sub-step：
Step 1.1：Obtain the curve quantity, each curve location, each curve head and the tail endpoint of two sections of curve chains；
Step 1.2：It is whether single continuous to obtain two sections of curve chains；
If so, being sorted to curve according to the order of connection of curve；
If it is not, curve chain is then revised as single continuous curve chain, sort to curve further according to the order of connection of curve；
Step 1.3：The starting that curve chain is arranged generates line；
Step 2：Number parameter or parameter of curve are selected, ruled surface is quickly generated；
Step 3：The ruled surface generated as needed carries out ruled surface modification：
Step 4：Cycle carries out step 2 and 3, carries out next round ruled surface design, until generating whole straight grains on two sections of curve chains
Face.
2. the Fast design method of ruled surface according to claim 1, it is characterised in that：In step 1.2, curve chain is single
Continuous refer to curve chain is full curve, and curve chain not bifurcated.
3. the Fast design method of ruled surface according to claim 1, which is characterized in that generate straight grain described in step 2
The specific implementation process in face is：By two sections sequence complete curve chains, according to step 1.3 select starting generate line or into
The start line gone constitutes the curve group for being currently generated ruled surface according to the curve number parameter of input, carries out curve group matching,
Ruled surface is generated, then next line segment for currently proceeding to curve is the start line that next round generates ruled surface.
4. the Fast design method of ruled surface according to claim 1, which is characterized in that generate straight grain described in step 2
The specific implementation process in face is：By trade-off curve group termination line segment, the curve chain that two sections of sequences are completed, according to step 1.3
The start line that the starting of selection generates line or has progressed to carries out curve according to the curve group for terminating line segment and constituting of selection
Group matching, generates ruled surface, then next line segment for currently proceeding to curve is the start line that next round generates ruled surface.
5. the Fast design method of ruled surface according to claim 3 or 4, it is characterised in that：In ruled surface generating process,
For start line since last round of next curve for terminating line segment, carrying out ruled surface design only need to select the curve number after start line
It measures parameter or terminates line segment this parameter of curve, selection terminates line segment and is necessary for the curve not proceeded in curve chain, two sections of songs
Do not have to distinguish in line end stopping of chain line segment selection course.
6. the Fast design method of ruled surface according to claim 1, it is characterised in that：In step 2, ruled surface generated
Cheng Zhong, current ruled surface by selecting the curve group that number parameter or parameter of curve are constituted to match by being generated.
7. the Fast design method of ruled surface according to claim 1, which is characterized in that ruled surface described in step 3 is repaiied
The specific implementation process changed is：According to ruled surface design requirement, straight grain delete and then is redesigned, then start line is again
At start line when returning to epicycle step 2.
8. the Fast design method of ruled surface according to claim 1, which is characterized in that ruled surface described in step 3 is repaiied
The specific implementation process changed is：According to ruled surface design requirement and it is currently generated situation, current ruled surface is reversed.
9. the Fast design method of ruled surface according to any one of claims 1 to 8, it is characterised in that：The method is
Based on UG NX three-dimensional modeling environment.
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