CN106844946A - A kind of special-shaped sheet metal component three-dimensional modeling method - Google Patents

A kind of special-shaped sheet metal component three-dimensional modeling method Download PDF

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CN106844946A
CN106844946A CN201710037717.7A CN201710037717A CN106844946A CN 106844946 A CN106844946 A CN 106844946A CN 201710037717 A CN201710037717 A CN 201710037717A CN 106844946 A CN106844946 A CN 106844946A
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sheet metal
metal component
plane
special
shaped sheet
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CN106844946B (en
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董向前
孙亚朋
王继承
张超
徐光浩
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China Agricultural University
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/20—Design optimisation, verification or simulation
    • G—PHYSICS
    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2111/00—Details relating to CAD techniques
    • G06F2111/04—Constraint-based CAD

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  • General Physics & Mathematics (AREA)
  • Evolutionary Computation (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Computational Mathematics (AREA)
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  • Mathematical Optimization (AREA)
  • Pure & Applied Mathematics (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

The invention belongs to mechanical field, more particularly to a kind of special-shaped sheet metal component three-dimensional modeling method.The method comprises the following steps：(1) special-shaped sheet metal component three-D profile is drawn：It is determined that the plane quantity of special-shaped sheet metal component, draws special-shaped sheet metal component three-D profile；(2) it is generally aligned in the same plane each face profile：It is generally aligned in the same plane each face profile of special-shaped sheet metal component；(3) each plane corner is constrained：Each plane corner of special-shaped sheet metal component is marked in three dimensions；(4) each Plane Entity is set up：It is stretching sketch with special-shaped sheet metal component face profile, sets up each Plane Entity, physical quantities is equal to the plane quantity of sheet metal component；(5) single entities are merged into：Each Plane Entity is merged into single entities；(6) three-dimensional sheet metal component is converted to：Metal plate thickness is set, and the plane intersection line for choosing each Plane Entity is bending sideline, generates sheet metal component and its expanded view.The convenient processing of the present invention, improve production efficiency.

Description

A kind of special-shaped sheet metal component three-dimensional modeling method
Technical field
The invention belongs to mechanical field, more particularly to a kind of special-shaped sheet metal component three-dimensional modeling method.
Background technology
Special-shaped sheet metal component is made up of multiple space metal plate planes, and each metal plate plane has various corners, because its is in irregular shape, Expanded view is difficult to determine that the method design through being welded frequently with piecemeal is processed, low production efficiency.Chinese invention application number 200710084693.7《The manufacture method and product of the sheet metal product with 3D shape》, propose a kind of system of sheet metal product Method is made, multiple component combinations are got up to manufacture the sheet metal product with 3D shape by it, but do not provide 3D shape sheet metal The method for drafting of product expanded view.Chinese invention application number 201210588106.9《Sheet metal component three-dimensional press-moulding die design technology》, make With CATIA three-dimensional sheet metal designing software modules, by extracting target sheet metal part surface, extracting piece surface and draw two dimension Figure, the method stretched to X-Y scheme obtain coverplate parts threedimensional model, and the method is fitted with existing sheet metal component as model To sheet metal component three-dimensional press-moulding die, but three-dimensional Sheet Metal Design method is not provided.
The content of the invention
It is an object of the invention to provide the convenient processing of one kind, the special-shaped sheet metal component three-dimensional modeling method of improve production efficiency.
To achieve these goals, the invention provides following technical scheme：
The present invention provides a kind of special-shaped sheet metal component three-dimensional modeling method, and the method comprises the following steps：
(1) special-shaped sheet metal component three-D profile is drawn：
It is determined that the plane quantity of special-shaped sheet metal component, draws special-shaped sheet metal component three-D profile；
(2) it is generally aligned in the same plane each face profile：
It is generally aligned in the same plane each face profile of special-shaped sheet metal component；
(3) each plane corner is constrained：
Each plane corner of special-shaped sheet metal component is marked in three dimensions；
(4) each Plane Entity is set up：
It is stretching sketch with special-shaped sheet metal component face profile, sets up each Plane Entity, physical quantities is equal to the flat of sheet metal component Face quantity；
(5) single entities are merged into：
Each Plane Entity is merged into single entities；
(6) three-dimensional sheet metal component is converted to：
Metal plate thickness is set, and the plane intersection line for choosing each Plane Entity is bending sideline, generates sheet metal component and its expanded view.
In the step (2), the specific method for drawing special-shaped sheet metal component three-D profile is as follows：
Triangular-shaped profile is generally aligned in the same plane, and is not required to constraint；
For the polygonal profile more than three sides, an optional summit A, in addition to both sides neighbouring vertices B, C, with other All summit D1、D2、……、DnSet up construction line AD1、AD2、……、ADn, n >=1；In construction line AD1、AD2、……、ADn Upper foundation point E1、E2、……、En；Cross summit A both sides neighbouring vertices and set up construction line BC；Make E1、E2、……、EnOverlapped with BC, i.e., Make profile ABD1D2……DnC is generally aligned in the same plane.
In the step (3), the specific method for constraining each plane corner is as follows：
Horizontal plane XOZ is around X-axis corner α1, a point G is looked for outside face1, G1Point along Y-axis, Z axis on the whole be projected as GY、GZ, mark Note ∠ G1GZGY=α1；
Horizontal vertical plane XOY is around Y-axis corner α2, a point G is looked for outside face2, G2Point along X-axis, Z axis on the whole be projected as GX、GZ, mark Note ∠ G2GXGZ=α2；
Indulge vertical plane YOZ corner α about the z axis3, a point G is looked for outside face3, G3Point along Y-axis, X-axis on the whole be projected as GY、GX, mark Note ∠ G3GYGX=α3。
Compared with prior art, the beneficial effects of the present invention are：
The present invention obtains any metal plate plane in space using the method for geometrical constraint and dimension constraint, using solid modelling and The method of metal plate conversion obtains special-shaped sheet metal component overall diagram and expanded view, convenient processing, improve production efficiency.
Brief description of the drawings
Fig. 1 is the flow chart of abnormity sheet metal component three-dimensional modeling method of the invention；
Fig. 2 is the schematic diagram that the present invention is generally aligned in the same plane special-shaped sheet metal component face profile；
Fig. 3 a are present invention mark horizontal plane corner α1Schematic diagram；
Fig. 3 b are the horizontal vertical plane corner α of present invention mark2Schematic diagram；
Fig. 3 c are the vertical vertical plane corner α of present invention mark3Schematic diagram；
Fig. 4 a are the front view of the comprehensive break shovel of the embodiment of the present invention；
Fig. 4 b are the side view of the comprehensive break shovel of the embodiment of the present invention；
Fig. 4 c are the A-A of Fig. 4 a to sectional view；
Fig. 5 a are the unilateral break shovel front view of Fig. 4 a；
Fig. 5 b are the unilateral break shovel side view of Fig. 4 a；
Fig. 6 a make the schematic diagram that hanging plate profile 4 is generally aligned in the same plane for the embodiment of the present invention；
Fig. 6 b make the schematic diagram that side tool profile 5 is generally aligned in the same plane for the embodiment of the present invention；
Fig. 6 c make the schematic diagram that bed plate profile 6 is generally aligned in the same plane for the embodiment of the present invention；
Fig. 7 is the schematic diagram (bed plate surface side view) of embodiment of the present invention mark bed plate face corner α；
Fig. 8 a are the schematic diagram (side tool front view) that the embodiment of the present invention marks side knife surface rotational angle theta；
Fig. 8 b are the schematic diagram (side tool side view) of embodiment of the present invention mark side knife surface corner γ；
Fig. 8 c are the schematic diagram (side tool top view) of embodiment of the present invention mark side knife surface corner β；
Fig. 9 a are embodiment of the present invention one side break shovel Plane Entity front view；
Fig. 9 b are embodiment of the present invention one side break shovel Plane Entity side view；
Figure 10 is the comprehensive break shovel unfolding sheet metal parts figure of the embodiment of the present invention.
Reference therein is：
The side tool of 1 hanging plate 2
The hanging plate profile of 3 bed plate 4
The bed plate profile of 5 side tool profile 6
The side tool entity of 7 hanging plate entity 8
9 bed plate entity M bending lines
The cutting angle of 3 earth lifting angle β side tools of α bed plaves 2
2 inclination angle in horizontal vertical plane of back rake angle θ side tools of γ side tools 2
Specific embodiment
The present invention is further described with reference to the accompanying drawings and examples.
As shown in figure 1, present invention abnormity sheet metal component three-dimensional modeling method comprises the following steps：
(1) special-shaped sheet metal component three-D profile is drawn
It is determined that the plane quantity of special-shaped sheet metal component, draws special-shaped sheet metal component three-D profile.
(2) it is generally aligned in the same plane each face profile
It is generally aligned in the same plane each face profile of special-shaped sheet metal component, specific method is as follows：
Triangular-shaped profile is generally aligned in the same plane, and is not required to constraint.
For the polygonal profile more than three sides, as shown in Fig. 2 an optional summit A, except both sides neighbouring vertices B, C it Outward, with other all summit D1、D2、……、DnSet up construction line AD1、AD2、……、ADn, n >=1；In construction line AD1、 AD2、……、ADnUpper foundation point E1、E2、……、En；Cross summit A both sides neighbouring vertices and set up construction line BC；Make E1、E2、……、 EnOverlapped with BC, even if profile ABD1D2……DnC is generally aligned in the same plane.
(3) each plane corner is constrained
Each plane corner of special-shaped sheet metal component is marked in three dimensions, specific method is as follows：
As shown in Figure 3 a, horizontal plane XOZ is around X-axis corner α1, a point G is looked for outside face1, G1Throwing of the point along Y-axis, Z axis on the whole Shadow is GY、GZ, mark ∠ G1GZGY=α1。
As shown in Figure 3 b, horizontal vertical plane XOY is around Y-axis corner α2, a point G is looked for outside face2, G2Throwing of the point along X-axis, Z axis on the whole Shadow is GX、GZ, mark ∠ G2GXGZ=α2。
As shown in Figure 3 c, vertical plane YOZ corner α about the z axis are indulged3, a point G is looked for outside face3, G3Throwing of the point along Y-axis, X-axis on the whole Shadow is GY、GX, mark ∠ G3GYGX=α3。
By the flatness, the space plane corner size that constrain three dimensions abnormity sheet metal component profile, you can it is determined that three-dimensional Any special-shaped sheet metal component face profile in space.
(4) each Plane Entity is set up
It is stretching sketch with special-shaped sheet metal component face profile, sets up each Plane Entity, physical quantities is equal to the flat of sheet metal component Face quantity.
(5) single entities are merged into
Each Plane Entity is merged into single entities.
(6) three-dimensional sheet metal component is converted to
Metal plate thickness is set, and the plane intersection line for choosing each Plane Entity is bending sideline, generates sheet metal component and its expanded view.
Embodiment
As a example by for the comprehensive break shovel (Fig. 4 a to Fig. 4 c) of agricultural tillage, angle parameter need to be constrained：3 soil of bed plate Angle α, the cutting angle β of side tool 2, the back rake angle γ of side tool 2, inclination angle theta of the side tool 2 in horizontal vertical plane.
Comprehensive break shovel metal plate model is set up according to the following steps：
(1) because break shovel is symmetrical structure, unilateral model only need to be set up, then does the mirror image of unilateral model, obtain another Side form type, finally merges into single entities by the two.
Unilateral break shovel has three face profiles：Bed plate profile 6, side tool profile 5, hanging plate profile 4.One side is drawn to loosen the soil Shovel wheel is wide, including three face profiles, as shown in figure 5 a and 5b.
(2) it is generally aligned in the same plane each face profile.
As shown in Figure 6 a, B is connected1C1、B2C2；In construction line B1C1Upper foundation point E4；Make E4With B2C2Overlap, make hanging plate (the profile B of profile 41B2C1C2) be generally aligned in the same plane.
As shown in Figure 6 b, A is connected1B1、A2B2；In construction line A1B1Upper foundation point E3；Make E3With A2B2Overlap, make side tool wheel 5 (profile A of exterior feature1A2B1B2) be generally aligned in the same plane.
As fig. 6 c, A is connected1A3、A1A4、A2A5；In construction line A1A3、A1A4Upper foundation point E1、E2；Make E1、E2With A2A5 Overlap, make (the profile A of bed plate profile 61A2A3A4A5) be generally aligned in the same plane.
(3) each plane corner is constrained
For bed plate face, as shown in fig. 7, in side view YOZ, setting up right angled triangle G1A5A4, G1A5Along Y-axis, G1A4 Along Z axis, mark ∠ G1A4A5=α.
For side knife surface：
As shown in Figure 8 a, in front view XOY, right angled triangle G is set up2A2B1, G2A2Along X-axis, G2B1Along Y-axis, mark ∠G2B3B4=θ.
As shown in Figure 8 b, in side view YOZ, right angled triangle G is set up3B1B3, G3B1Along Y-axis, G3B3Along Z axis, B3Straight Line B1A2On, mark ∠ G3B1B3=γ.
As shown in Figure 8 c, in top view XOZ, right angled triangle G is set up4B5B4, G4B4Along X-axis, G4B5Along Z axis, B4、B5 In contoured surface A1A2B1B2On, mark ∠ G4B5B4=β.
Mounting plate face overlaps with vertical vertical plane YOZ, without corner.
(4) each Plane Entity is set up
Respectively with profile A1A2A3A4A5、A1A2B1B2、B1B2C1C2Be stretching sketch, set up bed plate entity 9, side tool entity 8, Hanging plate entity 7, as shown in figures 9 a and 9b.
(5) single entities are merged into
Opposite side model is set up, each Plane Entity is merged into single entities.
(6) sheet metal component is converted to
It is 8mm to set metal plate thickness, chooses sideline A1A2、B1B2And the mirror image sideline A of the two1’A2’、B1’B2' it is bending Sideline, the generation comprehensive break shovel of sheet metal component (Fig. 4 a to Fig. 4 c) and its expanded view (Figure 10).
The embodiment of the present invention uses SolidWorks, wherein, step (1) uses " mirror image " and " 3D sketches " instrument；Step (2) " construction line " and " geometrical constraint " instrument are used；Step (3) uses " dimension constraint " instrument；Step (4) uses " stretching " work Tool；Step (5) uses " mirror image " and " combination " instrument；Step (6) uses " being transformed into metal plate " instrument.

Claims (3)

1. a kind of special-shaped sheet metal component three-dimensional modeling method, it is characterised in that：The method comprises the following steps：
(1) special-shaped sheet metal component three-D profile is drawn：
It is determined that the plane quantity of special-shaped sheet metal component, draws special-shaped sheet metal component three-D profile；
(2) it is generally aligned in the same plane each face profile：
It is generally aligned in the same plane each face profile of special-shaped sheet metal component；
(3) each plane corner is constrained：
Each plane corner of special-shaped sheet metal component is marked in three dimensions；
(4) each Plane Entity is set up：
It is stretching sketch with special-shaped sheet metal component face profile, sets up each Plane Entity, physical quantities is equal to the number of planes of sheet metal component Amount；
(5) single entities are merged into：
Each Plane Entity is merged into single entities；
(6) three-dimensional sheet metal component is converted to：
Metal plate thickness is set, and the plane intersection line for choosing each Plane Entity is bending sideline, generates sheet metal component and its expanded view.
2. special-shaped sheet metal component three-dimensional modeling method according to claim 1, it is characterised in that：In the step (2), draw The specific method of special-shaped sheet metal component three-D profile is as follows：
Triangular-shaped profile is generally aligned in the same plane, and is not required to constraint；
For the polygonal profile more than three sides, an optional summit A, in addition to both sides neighbouring vertices B, C, with other all tops Point D1、D2、……、DnSet up construction line AD1、AD2、……、ADn, n >=1；In construction line AD1、AD2、……、ADnOn set up a little E1、E2、……、En；Cross summit A both sides neighbouring vertices and set up construction line BC；Make E1、E2、……、EnOverlapped with BC, even if profile ABD1D2……DnC is generally aligned in the same plane.
3. special-shaped sheet metal component three-dimensional modeling method according to claim 1, it is characterised in that：In the step (3), constraint The specific method of each plane corner is as follows：
Horizontal plane XOZ is around X-axis corner α1, a point G is looked for outside face1, G1Point along Y-axis, Z axis on the whole be projected as GY、GZ, mark ∠ G1GZGY=α1；
Horizontal vertical plane XOY is around Y-axis corner α2, a point G is looked for outside face2, G2Point along X-axis, Z axis on the whole be projected as GX、GZ, mark ∠ G2GXGZ=α2；
Indulge vertical plane YOZ corner α about the z axis3, a point G is looked for outside face3, G3Point along Y-axis, X-axis on the whole be projected as GY、GX, mark ∠ G3GYGX=α3。
CN201710037717.7A 2017-01-18 2017-01-18 Three-dimensional modeling method for special-shaped sheet metal part Expired - Fee Related CN106844946B (en)

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