TWI383307B - System and method for obtaining contour sides and adjacent facets of a sheet metal part - Google Patents

Description

Automatic acquisition system and method for contour edge and adjacent surface of sheet metal part face

The present invention relates to an automatic acquisition system and method for a silhouette edge and an adjacent face of a sheet metal part face.

In the secondary development using the mold design software Pro/Engineer, sometimes it is not possible to identify or process a part of the geometry according to the system characteristics (ie, the method of creating the three-dimensional part). Sometimes it can be processed through features, but the richness of the system features makes it possible for a geometry to be combined by different features flexibly. Therefore, it is not comprehensive enough to process some geometry through features, only through the entities (ie parts) The original points, lines, and faces identify or process a geometry.

The access of the entity is generally from the face-to-face contour (ie the inner edge or the outer edge) to the edge of the contour. During the loop access operation, the developer often performs these operations and calls the function. More, the code is long and cumbersome. Moreover, the body is composed of faces, there is no special rule between face and face, and the access and recognition of the face often need to use face-related faces, so the geometric internal relationship is needed to determine a special set of faces. Faces and edges, ie the silhouette edges and adjacent faces.

In view of the above, it is necessary to provide an automatic acquisition system and method for the contour side and adjacent side of the sheet metal part surface, which can automatically obtain the contour side and the adjacent side of the sheet metal part face.

An automatic acquisition system for a silhouette edge and an adjacent surface of a sheet metal part surface, comprising a host, the host comprising a mold design unit for generating a sheet metal part pattern and establishing a graphic database, wherein the graphic database is used for storing the sheet metal The attributes of the part graphic and the sheet metal part graphic, the attributes of the sheet metal part graphic include a face included in the sheet metal part graphic, a silhouette edge included in each face, an identifier of each face, and an identifier of each silhouette edge, the host An automatic acquisition unit is further included, the automatic acquisition unit includes: a contour acquisition module, configured to acquire a contour of the given surface after the user selects a given surface of the sheet metal part graphic; Obtaining a contour edge of the contour, and saving the identifier of the contour edge into an array of contour edges; an adjacent surface acquiring module, configured to acquire two adjacent surfaces of the contour edge, and the two adjacent The identifier of the face and the identifier of the given face, select one of the two adjacent faces to identify an adjacent face that is not equal to the given face identifier, and save the identifier of the adjacent face to The display module is configured to obtain the identifier of the contour edge of the given surface from the contour edge array and the adjacent surface array after the contours and contour edges of all the given surfaces are acquired. And the identification of the adjacent faces, the outline edges and adjacent faces of the given face are displayed in different colors.

An automatic acquisition method for a silhouette edge and an adjacent surface of a sheet metal part surface, comprising the steps of: (a) selecting a given surface of the sheet metal part pattern; (b) obtaining the contour of the given surface; (c) acquiring the location a contour edge of the contour, the identifier of the contour edge is saved into an array of contour edges; (d) acquiring two adjacent faces of the silhouette edge, an identifier of the two adjacent faces, and the given The identifier of the surface, selecting one of the two adjacent faces to identify an adjacent face that is not equal to the given face identifier, and saving the identifier of the adjacent face to an adjacent face array; (e) determining whether After obtaining the contour edge of the contour, if all the contour edges are obtained, proceed to step (f), if there is still no contour edge acquisition, return to step (c); (f) determine whether the given surface is obtained. Contour, if all the contours are obtained, proceed to step (g), if there is still no contour acquired, return to step (b); (g) obtain the given surface from the contour edge array and the adjacent surface array The identification of the silhouette edge and the identification of the adjacent face, the given color is displayed in different colors The contour edges and adjacent surfaces.

Compared with the prior art, the automatic acquisition system and method for the contour edge and the adjacent surface of the sheet metal part surface can automatically obtain the contour edge and the adjacent surface of the sheet metal part surface, and do not need multiple loops to access the part. Geometry such as line contours increases the speed of product design.

Referring to Figure 1, there is shown a system architecture diagram of a preferred embodiment of an automatic acquisition system for contoured and adjacent faces of a sheet metal part face of the present invention. The system mainly includes a display 1, a host 2, a keyboard 3 and a mouse 4, and the host 2 includes a mold design unit 20 and an automatic acquisition unit 21. The mold design unit 20 is a mold automatic design software (such as Pro/Engineer) for generating various sheet metal part patterns in the mold design. The mold design unit 20 includes a graphic library 30 for storing sheet metal part patterns generated by the mold design unit 20 and attributes of each sheet metal part pattern. The attributes of the sheet metal part graphic include the face included in the sheet metal part graphic, the silhouette edge included in each face, the identification of each face, and the identification of each silhouette edge. Each face and each silhouette edge has its own logo, through which a face and a silhouette edge can be uniquely identified. The automatic acquisition unit 21 is configured to automatically acquire adjacent faces and silhouette edges of the sheet metal part faces.

The main body 2 is connected with a display 1 for displaying the sheet metal part pattern generated by the mold design unit 20 and the adjacent faces and contour sides of the sheet metal part faces acquired by the automatic acquisition unit 21. The keyboard 3 and the mouse 4 are used as input devices, and data can be input when generating a sheet metal part pattern and selecting a sheet metal part face.

The automatic acquisition unit 21 includes a contour acquisition module 210, a contour edge acquisition module 211, an adjacent surface acquisition module 212, and a display module 213. The module referred to in the present invention is a computer program segment for performing a specific function, and is more suitable for describing the execution process of the software in the computer than the program. Therefore, the following description of the software is described in the module.

The contour acquisition module 210 is configured to acquire the contour of the given surface after the user selects a given surface of the sheet metal part graphic. The contour of the given face includes an inner contour and an outer contour, and the like.

The contour edge acquiring module 211 is configured to acquire a contour edge of the contour (as a contour edge of the given surface), and save the identifier of the contour edge into a contour edge array. The contour edge acquiring module 211 is further configured to determine whether the contour edge of the contour is obtained.

The adjacent surface acquiring module 212 is configured to acquire two adjacent faces of the silhouette edge, an identifier of the two adjacent faces, and an identifier of the given face, from the two adjacent faces An adjacent face (which is an adjacent face of the given face) that is not equal to the given face identifier is selected, and the identifier of the adjacent face is saved in an adjacent face array. Specifically, first, the adjacent surface acquisition module 212 acquires two adjacent faces of the silhouette edge, an identifier of the two adjacent faces, and an identifier of the given face. Then, the adjacent surface acquisition module 212 determines whether the identifier of the first adjacent surface of the two adjacent surfaces is equal to the identifier of the given surface. If the identity of the first adjacent face is equal to the identity of the given face, the identification of the second of the two adjacent faces is saved into the adjacent face array. If the identity of the first adjacent face is not equal to the identity of the given face, the identification of the first adjacent face is saved into the adjacent face array.

The adjacent surface acquiring module 212 is further configured to determine whether the contour of the given surface is acquired.

The display module 213 is configured to acquire the identifier of the edge of the given face and the adjacent face from the silhouette edge array and the adjacent face array after the contours and the silhouette edges of all the given faces are acquired. Marking, displaying the silhouette edges and adjacent faces of the given face in different colors.

Referring to Figure 2, there is shown a flow chart of a preferred embodiment of an automatic acquisition method for contoured edges and adjacent faces of a sheet metal part face of the present invention. First, in step S401, the user selects a given face of the sheet metal part graphic.

In step S402, the contour acquisition module 210 acquires the contour of the given surface. The contour of the given face includes an inner contour and an outer contour, and the like.

Step S403, the contour edge acquiring module 211 acquires the contour edge of the contour (as the contour edge of the given surface), and saves the identifier of the contour edge into a contour edge array.

Step S404, the adjacent surface acquiring module 212 acquires two adjacent faces of the silhouette edge.

Step S405, the neighboring surface acquiring module 212 acquires the identifiers of the two adjacent faces and the identifier of the given face.

Step S406, the adjacent plane obtaining module 212 selects, from the two adjacent planes, an adjacent surface (which is an adjacent surface of the given surface) that is not equal to the given surface identifier, and The identification of the adjacent face is saved into an adjacent face array. Specifically, first, the adjacent surface acquisition module 212 acquires two adjacent faces of the silhouette edge, an identifier of the two adjacent faces, and an identifier of the given face. Then, the adjacent surface acquisition module 212 determines whether the identifier of the first adjacent surface of the two adjacent surfaces is equal to the identifier of the given surface. If the identity of the first adjacent face is equal to the identity of the given face, the identification of the second of the two adjacent faces is saved into the adjacent face array. If the identity of the first adjacent face is not equal to the identity of the given face, the identification of the first adjacent face is saved into the adjacent face array.

In step S407, the contour edge acquiring module 211 determines whether the contour edge of the contour is acquired. If all the contour edges have been acquired, the flow proceeds to step S408, and if there are still contour edges not acquired, the flow advances to step S403.

In step S408, the adjacent surface acquisition module 212 determines whether the contour of the given surface is acquired. If the contours of all the given faces are acquired, the flow advances to step S409, and if there is still no outline of the given face, the flow advances to step S402.

Step S409, the display module 213 acquires the identifier of the contour edge of the given surface and the identifier of the adjacent surface from the contour edge array and the adjacent surface array, and displays the contour edge of the given surface in different colors. Adjacent faces.

The automatic acquisition system and method for the contoured edges and adjacent faces of the sheet metal part of the present invention are disclosed above in the preferred embodiment, but are not intended to limit the invention. Any person skilled in the art will be able to make changes and refinements without departing from the spirit and scope of the invention, and the scope of the invention is defined by the scope of the appended claims.

monitor. . . 1

Host. . . 2

keyboard. . . 3

mouse. . . 4

Mold design unit. . . 20

Automatic acquisition unit. . . twenty one

Graphic database. . . 30

Contour acquisition module. . . 210

Contour edge acquisition module. . . 211

Adjacent surface acquisition module. . . 212

Display module. . . 213

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a system architecture diagram of a preferred embodiment of an automatic acquisition system for contoured and adjacent faces of a sheet metal part face of the present invention.

2 is a flow chart of a preferred embodiment of an automatic acquisition method for contour edges and adjacent faces of a sheet metal part face of the present invention.

monitor. . . 1

Host. . . 2

keyboard. . . 3

mouse. . . 4

Mold design unit. . . 20

Automatic acquisition unit. . . twenty one

Graphic database. . . 30

Contour acquisition module. . . 210

Contour edge acquisition module. . . 211

Adjacent surface acquisition module. . . 212

Display module. . . 213

Claims (4)

An automatic acquisition system for a silhouette edge and an adjacent surface of a sheet metal part surface, comprising a host, the host comprising a mold design unit for generating a sheet metal part pattern and establishing a graphic database, wherein the graphic database is used for storing the sheet metal The attributes of the part graphic and the sheet metal part graphic, the attributes of the sheet metal part graphic include a face included in the sheet metal part graphic, a silhouette edge included in each face, an identifier of each face, and an identifier of each silhouette edge, wherein The host further includes an automatic acquisition unit, and the automatic acquisition unit includes: a contour acquisition module, configured to acquire a contour of the given surface after the user selects a given surface of the sheet metal part graphic; a contour edge for acquiring the contour, the identifier of the contour edge is saved into an array of contour edges; an adjacent surface acquisition module is configured to acquire two adjacent surfaces of the contour edge, and the two An identifier of the adjacent face and an identifier of the given face, and selecting one of the two adjacent faces to identify an adjacent face that is not equal to the given face identifier, and identifying the adjacent face Storing into an adjacent array of faces; and displaying a module for acquiring the contour of the given surface from the array of contour edges and the array of adjacent planes after the contours and contour edges of all the given faces are acquired The identification of the edge and the identification of the adjacent face, the outline edge and the adjacent face of the given face are displayed in different colors. An automatic acquisition system for a silhouette edge and an adjacent face of a sheet metal part surface as claimed in claim 1, wherein the contour of the given surface comprises an inner contour and an outer contour. An automatic acquisition method for a silhouette edge and an adjacent surface of a sheet metal part surface, the method comprising the steps of: (a) selecting a given surface of the sheet metal part pattern; (b) obtaining the contour of the given surface; (c) Obtaining a silhouette edge of the contour, saving the identifier of the contour edge into an array of contour edges; (d) acquiring two adjacent faces of the silhouette edge, an identifier of the two adjacent faces, and the An identifier of a given face, selecting one of the two adjacent faces to identify an adjacent face that is not equal to the given face identifier, and saving the identifier of the adjacent face to an adjacent face array; (e) Determining whether the contour edge of the contour is obtained, if all the contour edges are acquired, proceeding to step (f), if there is still no contour edge acquisition, returning to step (c); (f) determining whether the given reference is obtained The contour of the face, if all the contours are obtained, go to step (g), if there is still the contour not obtained, return to step (b); and (g) obtain the given from the contour edge array and the adjacent surface array The identification of the silhouette edge of the facet and the identification of the adjacent face are displayed in different colors To the contour of said given surface and an adjacent side surface. An automatic acquisition method of a silhouette edge and an adjacent surface of a sheet metal part surface as described in claim 3, wherein the contour of the given surface includes an inner contour and an outer contour.