CN112182681A

CN112182681A - Method for rapidly designing lapel collar style modeling based on AutoCAD software

Info

Publication number: CN112182681A
Application number: CN202011148109.1A
Authority: CN
Inventors: 张皋鹏; 华启耀
Original assignee: Sichuan University
Current assignee: Sichuan University
Priority date: 2020-10-23
Filing date: 2020-10-23
Publication date: 2021-01-05

Abstract

The invention relates to a method for rapidly designing style modeling of lapel collar based on AutoCAD software, which is used for rapidly designing lapel collars of different styles by carrying out parametric modeling on lapel collar paper patterns through an AutoCAD parametric function on the basis of a basic lapel collar style and adjusting the change of lapel point height and height, lapel width, collar base width, lapel head width, collar mouth missing angle and the like. Drawing a basic lapel structure, carrying out parametric constraint on the basic lapel structure through an AutoCAD (auto computer aided design) parametric function, and establishing a functional relation and a geometric relation between a base point of turning over and a turning over stop point, the width of the lapel, the width of a collar base and the loosening amount of the lapel; finally, the aim of designing the style and shape of the lapel collar is quickly fulfilled by adjusting related parameters. The invention solves the problems of low drawing efficiency, unstable quality, complicated steps and the like of the lapel collar structure diagram in the current market, improves the production efficiency of clothing enterprises, and provides certain technical guarantee for large-scale customized clothing.

Description

Method for rapidly designing lapel collar style modeling based on AutoCAD software

Technical Field

The invention relates to the technical field of garment structure, in particular to the field of garment collar structure design.

Background

The lapel is commonly called suit collar and is composed of lapels and lapels formed by folding clothes body parts. The lapel collar has the comprehensive characteristics of all collar structures, and is a collar with the widest application, the strongest technical performance and the most complex structure in the design of the garment structure. The lapel collar structure mainly comprises the size and shape of a collar gap mouth, the modeling of an outer opening line of the lapel collar, the width of a folding door, the height and the inclination of a serial opening line, the width and the shape of a lapel head, the width of the lapel collar, the length and the shape of the lapel opening line and the like. On the basis of the basic lapel style, lapels with different styles can be designed by adjusting the lapel height, the lapel width, the collar base width, the lapel shape, the flapped mouth shape and other changes.

The lapel collar paper pattern design in the current market basically depends on the experience of a platemaker, and the designer considers the lapel width, the lapel width and the collar base width, the lapel outer collar length, the folding door width, the shoulder slope, the collar length, the height and the gradient of a serial line, the thickness of fabric, the numerical value of lodging quantity, the manufacturing process, the drawing and the like when designing the lapel collar. After the platemaker finishes drawing, the platemaker needs to make sample clothes to check whether the lapel structure is reasonable in design, and needs to draw again if the lapel structure is not proper. On one hand, randomness in the lapel structure design is increased, quality is difficult to stabilize, time and labor are consumed, on the other hand, multiple factors are considered, and drawing steps are complex, so that reasonable lapel structure design needs to be completed by a platemaker with years of plate making experience, large-scale and small-batch production in the current clothing market is not facilitated, and a method for rapidly designing lapel patterns with different styles and shapes is particularly important for enterprises pursuing production benefits and efficiency.

Parametric design is a method of defining the values of geometric figures and appointing geometric relationships using a set of parameters for the designer to perform geometric modeling. The parameterized design of the clothing pattern is to control the relationship between the graphic objects through geometric constraint and size constraint, and further, the fixed-size pattern can be converted into the parameterized pattern by defining the functional relationship between the graphic objects. Wherein how to construct the functional relationship geometrical relationship between the graphic objects is the key of the technology.

Disclosure of Invention

The invention aims to provide a method for quickly designing lapel style based on AutoCAD software, aiming at quickly changing lapel style on a lapel basic style so as to adapt to styles or sizes of different clothes, reduce repetitive labor of clothes drafters and improve clothes production efficiency.

In order to achieve the aim, the invention discloses a method for rapidly designing a lapel collar modeling based on AutoCAD software, which provides a series of constraint models and constraint parameters in a lapel collar foundation structure to constrain each structure line of the lapel collar, and is characterized by comprising the following steps: step1, drawing front and back body parts and lapel base structure lines by using AutoCAD2020, and storing in DWG format.

step 2, using an AutoCAD2020 parameterization tool to carry out geometric constraint and labeling constraint on a basic lapel structure chart drawn by step1, and carrying out constraint association between each structure line and each point in the lapel pattern by defining parameters and establishing a related function relational expression. And saving the DWG file after the constraint is completed.

And step 3, opening the lapel design structure model drawn by step 2, opening a parameterization manager, adjusting related parameters, and changing the lapel shape.

Preferably, step 2 also needs to determine the geometric relationship between the lines, the points and the points of the lapel pattern structure and the lines.

Preferably, step 2 further needs to determine the position relationship between the turning base point and the lateral neck point.

Preferably, step 2 further needs to restrict the positional relationship between the folding base point and the folding end point through an auxiliary triangle.

Preferably, step 2 also needs to determine the relationship between the lapel width and the collar base width, as well as the appropriate adjustment range.

Preferably, step 2 also requires the determination of the functional relationship between the lapel width, the collar base width, the collar side angle and the shoulder bevel angle, and the lapel looseness.

Compared with the prior art, the invention has the beneficial effects that: the scheme solves the problems of low design efficiency, unstable quality, complex steps and the like of the lapel style modeling in the current market, applies the advantages of computer aided design on graphic processing, is an important technical means for the trend of automation of clothing enterprises, improves the production efficiency of the clothing enterprises, reduces the repeated labor of clothing platemakers, and provides certain technical support for large-scale clothing customization.

Drawings

Fig. 1 is a schematic diagram of a cultural dress body prototype of the eighth generation.

Fig. 2 is a schematic view of the basic modeling structure of the lapel collar.

FIG. 3 is a schematic view showing the amount of collar loosening.

Fig. 4 is a lapel labeling constraint diagram.

Fig. 5 is a diagram of lapel geometry constraints.

Fig. 6 is a view for adjusting the position of the lapel turn-over dead point.

Fig. 7 is a view for adjusting the width of the lapel folding door.

Fig. 8 is a view for adjusting the width of the lapel head.

Fig. 9 is a view for adjusting the lapel width.

Fig. 10 is a view for adjusting the width of a lapel collar.

Fig. 11 is a view showing the adjustment of the angle of the missing corner of the lapel collar.

Detailed Description

The invention aims to provide a method for quickly designing lapel collar style modeling based on AutoCAD software.

In order to achieve the purpose, the invention discloses a parametric modeling method of lapel collar patterns.

In order to make the present invention more clear and understandable, an preferred embodiment is provided, in which AutoCAD2020 is used as a technical platform, and core constraints between lapel modeling lines are specifically described, and specific constraints are shown in the form of drawings. The principles and specific implementation steps of the present invention are described below in conjunction with the following figures.

Step1, determining a folding base point.

And opening the AutoCAD, designing related environment variables, and drawing front and back clothes body prototypes by taking the eighth generation culture type prototype as a standard template, as shown in figure 1. Selecting a paper pattern by using a mouse frame, parameterizing a panel and automatically constraining.

As shown in fig. 2, the dot pattern under the format toolbar is clicked, and the dot pattern is changed to the ninth from the top; setting unit accuracy as 'mm', opening a 'capture mode', clicking a 'point' tool under a 'drawing' toolbar, inwards deviating by 7mm along a shoulder line lateral neck point B of the front clothes body, determining a point C, clicking an 'alignment' constraint of a labeling constraint in a parameterization toolbar, and designating a constraint line segment BC as 'lateral neck point'.

Selecting an 'elongation' tool in a modification toolbar, selecting an 'increment' mode, inputting a numerical value 18, moving a cursor to a position, close to a lateral neck point B, of a front shoulder line, determining a turning base point A, using 'alignment' constraint, constraining a line segment CA and naming the turning base point. And opening the parameter manager, modifying the expression of the folding base point to be the side neck point +18, and completing the constraint of the folding base point.

And 2, fixing the overturning stop point and the stacking width.

Clicking the 'lengthening' tool, selecting an 'increment' mode, inputting a numerical value of 20, selecting an intersection point H of the chest line and the front central line, determining a refuting point G to the right, connecting AG, and drawing a polyline.

And opening an orthogonal limit cursor, clicking a straight line tool, drawing a straight line GI downwards by taking G as a base point, drawing a straight line IJ horizontally leftwards, and determining the width of the folding door. And through marking the linear constraint of the constraint, constraining a line segment HG, named as the stack door width, opening a parameterization manager, newly building a user parameter D1, wherein the numerical value is the stack door width, modifying the stack door width expression marked with the constraint into D1 +/-modifier, and finishing the constraint of the stack door width.

Click the "fixed number equal division" tool in the "drawing" toolbar to halve the line segment SC and determine the point D.

Drawing a serial line DE at a crossing point D, wherein the DE is tangent to a front clothes body neck nest line and is tangent to a point R; clicking the 'tangent' constraint in the geometric constraint option bar in the parameterized panel, the dimple arc before constraint is tangent to the string line DE.

Making a passing point E as a perpendicular line of the AG, making an intersection point F and determining a lapel width EF; clicking a vertical constraint in a geometric constraint to constrain straight lines EF and AG; and (3) using a linear constraint line segment EF, namely a lapel width, newly building a user parameter D2, wherein the numerical value is the length of the lapel width EF, modifying the expression of the lapel width in the labeling constraint into D2 +/-modifier, and completing the lapel width constraint.

And drawing the lapel shape. And (3) selecting a mode of 'starting point, end point and direction' in the 'arc' toolbar, drawing an arc end EG outwards by taking E as the starting point and G as the end point, and finishing the drawing of the lapel shape.

Starting from the point E, using a 'point' tool, deviating by 35mm along the serial line DE, and setting the point P as a base point of the collar missing mouth corner. A straight line tool is used, P is used as a starting point, a fixed point Q is arranged 30mm upwards, and a angle QPE is a collar-missing nozzle angle and ranges from 60 degrees to 90 degrees. Using the 'alignment' constraint of a parameterization tool, constraining a line segment EP, named as 'neck lacking mouth corner base point', and similarly constraining a line segment PQ, named as 'lapel neck corner width'; and (3) using the angle constraint in the labeling constraint to constrain < QPE, and naming the constraint as the < lacked nozzle angle ".

Drawing auxiliary delta AUG. Opening an orthogonal limit cursor, using a straight line tool, taking the point A as a starting point, drawing a straight line AU vertical to the chest line, and connecting UG; the line segments AU and UG are constrained by a "vertical" constraint. And (3) constraining the vertical line AU by using 'linear' constraint, naming the vertical line AU as a 'turning over stop point', newly establishing a user parameter D3, wherein the numerical value is the length of the line segment AU, and modifying the 'turning over stop point' expression in the labeling constraint into 'D3 +/-modifier'.

Using an alignment constraint to constrain a line segment AG, and naming the line segment AG as a folded line length; similarly, the line segment UG is constrained and named as an auxiliary line.

In the right angle Δ AUG, given the AU vertical UG, as can be derived from the pythagorean theorem, AU + UG has been transferred to the AG. Newly building a user parameter D4, modifying the expression into 'sqrt (the turning dead point + the auxiliary line)', and modifying the expression of 'the turning line length' in the labeling constraint into 'D4 +/-modifier'. And finishing the constraint of the turning over stop point.

And 3, drawing a lapel.

Inputting a LIST command through a command line, measuring the length VX of the rear collar arc, opening a parameterization management panel, newly building a user parameter named as the length VX of the rear collar arc, and storing a measurement value.

Taking the point C as a base point, drawing a parallel line of a turning line AG = a rear neckline arc length VX = BL by using a straight line tool; using a "parallel" constraint in the geometric constraint, constraining the geometric relationship of lines BL and AG; drawing a line segment CM = BL, connecting ML =25mm, using a straight line tool with C as a starting point; using a "linear" constraint, the line segment ML is constrained, named "amount of pouring".

And drawing the collar base width and the lapel width. Assuming that the collar base width value is a and the lapel width value is b; the value of a is generally 10-50 mm, and b is more than a +5mm, generally 15-100 mm, due to the limitation of the height of the neck.

Opening an "orthogonal constraint cursor" to point M bit base points, and drawing a straight line MN =30mm perpendicular to MC; and (3) using a 'stretching' tool, selecting an 'increment' mode, taking N as a base point, extending to O point, and completing the drawing of the lapel width. Using the "alignment" constraint segments MN, NO in the parameterized panel, named "collar width" and "lapel width", respectively, and setting the expression for the lapel width to "collar width + 10". The drawing vertical line OT is the outer collar arc length, the alignment constraint line OT is used and named as the outer collar arc length, the expression is designed to be the outer collar arc length, and the specific numerical value needs to be measured through the LIST command and updated in real time so as to ensure that the lapel neck is fitted. And connecting a lapel collar angle TQ by using a smooth curve, connecting CK by using the smooth curve with C as a starting point, and completing the drawing of lapel.

And 4, determining the lapel loosening amount.

The collar-turning bulk is the difference between the arc length of the outer collar and the arc length of the back collar, i.e. the collar-turning bulk = the arc length of the outer collar (. tangle-solidup.) -. the arc length of the back collar (. DELTA.). In a triangular AOB consisting of a leading seat width a and a lapel width b, theta = alpha (leading side angle) + gamma (shoulder oblique angle), theta >90 DEG is defined as corresponding sides of the triangular AOB being a, b and c respectively, and b = a + c-2 ac cos theta derived from a cosine formula can be further defined as c = acos theta + sqrt (b-a sin theta). In the back cut piece, with W as the base point, it is determined that point Y = c = acos θ + sqrt (b-a sin θ), the outer collar arc length is completed by determining point X = side neck point, connecting XY, with V as the base point. The collar-turning looseness = outer collar arc length (a-solidup) -rear collar arc length (delta), the outer collar arc length and the rear collar arc length are used as user parameters, and the LIST command is used for measuring numerical values and inputting an expression; the value of the key parameter is changed along with the change and variation of the lapel width, the collar base width and theta and is used as an important parameter for judging whether the collar is combined or not. The saved file is in DWG format and named as 'lapel collar pattern'.

And 5, rapidly designing the style of the lapel collar.

The style modeling of the lapel can be quickly designed on the AutoCAD software by the parameterized design of the lapel pattern in the 4 steps. By changing several parameter values, the lapel collar patterns with different effects can be obtained.

The 'lapel sample' is opened, the parameter manager is entered, and some variation effects are obtained by modifying the parameters, the detailed labeled parameters can be shown in a lapel labeling constraint diagram of fig. 4, a geometric constraint diagram is shown in fig. 5, and related cases are shown in the following examples.

The design scheme I is as follows: and changing the position of the turnover dead point. And moving the turnover dead point downwards by 20mm, 40mm and 80mm from the BL line. The style and shape of the lapel collar are changed as shown in fig. 6, the length of the lapel collar is changed along with the change of the style and shape, and the vertical inclination of the lapel line is influenced from the structural point of view. For conventional clothes, the positions and the number of buttons are regulated, namely: the refuting stop point of one button is generally flush with the big bag opening, and the refuting point of two buttons is generally 20mm above the waist section line; the refuting point of the three buttons is parallel and level with the armhole deep line, and the like.

The design scheme II comprises the following steps: the width of the folding door is changed. The width of the door is increased from 20mm to 30mm and 50 mm. The effect of the change in width of the gate is shown in figure 7.

The design scheme is three: the lapel width is changed to 70mm, 80mm, 90mm and 100mm, the lapel width changing effect is shown as 8, and when the lapel stop point position is not changed, the width of the lapel can be changed along with the trend that clothes are fashionable and popular.

The design scheme is four: the lapel width is changed. The width of the lapel is increased from 40mm to 45mm and 50 mm. The lapel width changing effect is shown in fig. 9.

The design scheme is five: the width of the collar seat is changed. The collar base width is reduced from 30mm to 20mm and 10mm, and the collar base width changing effect is shown in figure 10.

The design scheme is six: the collar tip is changed. The collar gap angle was modified to 60 ° and 90 °, as shown in fig. 11.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, but rather as the subject matter of any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention.

Claims

1. A method for rapidly designing lapel collar style modeling based on AutoCAD software is characterized in that: the method comprises the following steps:

step1, drawing front and back body cut pieces and lapel basic structure lines by using AutoCAD2020, and storing the cut pieces and lapel basic structure lines in a DWG format; step 2, carrying out geometric constraint and marking constraint on a basic lapel structure drawing by step1 by using an AutoCAD2020 parameterization tool, carrying out constraint association between each structure line and each point in the lapel pattern by defining parameters and establishing a related function relational expression, and storing a DWG file after the constraint is finished; and step 3, opening the lapel design structure model drawn by step 2, opening a parameterization manager, adjusting related parameters, and changing the lapel shape.

2. The method for rapidly designing the lapel collar style modeling based on the AutoCAD software as recited in claim 1, wherein the step 2 further needs to determine the geometric relationships between the lapel collar pattern structure lines and the lines, the points and the dots, and the points and the lines.

3. The method for rapidly designing lapel collar style modeling based on AutoCAD software as recited in claim 1, wherein step 2 further needs to determine the position relationship between the folding base point and the lateral neck point.

4. The method for rapidly designing lapel style modeling based on AutoCAD software as claimed in claim 1, wherein the step 2 further needs to constrain the position relationship between the base folding point and the end folding point by the auxiliary triangle.

5. The method for rapidly designing lapel style modeling based on AutoCAD software as recited in claim 1, wherein step 2 further needs to determine the relationship between lapel width and collar base width, and the appropriate adjustment range.

6. The method for rapidly designing lapel collar style modeling based on AutoCAD software as recited in claim 1, wherein step 2 further needs to determine a functional relationship between lapel width, collar seat width, collar side angle and shoulder bevel angle, and lapel bulk.