JP2015087815A - Morphing method for coil shape component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique for maintaining continuity of a shape in morphing of a line element or a beam element.SOLUTION: A morphing method for a coil shape component comprises the steps of: extracting a center line or a central axis from a model of coil to convert them to a line element or a beam element respectively; and automatically generating a plate element or a surface element from the converted line element or the converted beam element to implement morphing.

Description

  The present invention relates to a method for morphing a coil-shaped part.

  In Patent Document 1, when a free-form surface is represented by two parameters, the two parameters are normalized to 0 and 1 sections, and an equal parameter curve in two directions expressed by the two normalized parameters is obtained. A free-form surface determination method is disclosed in which it is determined whether any of the acquired two-direction equiparameter curves is a spiral-curve equiparameter curve.

  Japanese Patent Application Laid-Open No. 2004-151867 discloses surface element distortion detection that detects the distortion of a surface element created by such a design support apparatus that forms the surface of the three-dimensional model by combining surface elements that cover at least a part of the three-dimensional model. An apparatus is disclosed.

JP 2004-54849 A JP 2008-33678 A

  If it is a surface element or a plate element, it is possible to detect and correct the distortion even in the morphing of the prior art. However, in the case of a line element or a beam element, it has been difficult to detect distortion or automatically adjust the tension in the morphing of the prior art. For this reason, the existing tool has a problem that discontinuity occurs when, for example, one point of the beam is pulled to change the shape.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a technique for maintaining continuity of shapes in morphing of line elements and beam elements.

  In order to solve the above-described problem, in the morphing method for a coil-shaped part according to an aspect of the present invention, a center line or a central axis is extracted from a coil model and converted to a line element or a beam element. Morphing is performed by automatically generating plate elements or plane elements from the elements. According to this aspect, the continuity of the shape can be maintained in the morphing of the line element and the beam element.

  ADVANTAGE OF THE INVENTION According to this invention, the technique for maintaining the continuity of a shape in the morphing of a line element or a beam element can be provided.

FIG. 1A to FIG. 1D are diagrams for explaining a morphing method for a coil-shaped component according to an embodiment. It is a functional block diagram which shows the structure of the morphing apparatus which performs the morphing method of the coil-shaped components which concerns on embodiment. It is a flowchart for demonstrating the morphing method of the coil-shaped components which concern on embodiment. FIG. 4A is a diagram for explaining an extraction example of the coil center line and the coil axis line. FIG. 4B is a diagram showing an example of the morphing method for the coil-shaped component according to the present embodiment.

  Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and repeated descriptions are omitted as appropriate.

  FIG. 1A to FIG. 1D are diagrams for explaining a morphing method for a coil-shaped component according to an embodiment. FIG. 1A is a diagram showing a state in which a ribbon-like plate element is generated, and FIG. 1B is a diagram showing a state in which the vicinity of the center of the line element extracted from the coil model is pushed out by 20 mm. FIG. 1C is a diagram illustrating a state in which a spiral plate element is generated, and FIG. 1D is a diagram illustrating a state in which the central axis of the line element extracted from the coil model is extruded 20 mm.

  In the morphing method for coil-shaped parts according to the present embodiment, a center line or a center axis is extracted from a coil model and converted to a line element or a beam element, and a plate element or a surface element is converted from the converted line element or beam element. It is automatically generated and morphed.

  Specifically, when morphing the coil winding shape, as shown in FIGS. 1A and 1B, the coil model is first changed to the line element 10 (or beam element) having only the center line. Next, a ribbon-like plate element 20 is automatically generated in the changed shape of the line element 10. Then, shape change, that is, morphing is performed on the obtained plate element 20. This morphing can be performed using existing tools. As described above, by automatically generating a ribbon-like plate element from the coil shape and performing morphing, it is possible to suppress distortion without maintaining the continuity of the shape. That is, the continuity of the shape can be maintained even in the morphing of the existing plate element or surface element.

  Further, as shown in FIGS. 1C and 1D, first, the coil model is changed to a line element 10 (or a beam element) having only a center line. Next, a spiral plate element 30 that passes through the wound central axis 12 is automatically generated in the changed shape of the line element 10. Then, morphing is performed on the obtained plate element 30. This morphing can be performed using existing tools. As described above, by automatically generating a spiral plate element passing through the central axis of the coil shape and performing morphing, it is possible to suppress distortion without maintaining continuity of the shape. That is, the continuity of the shape can be maintained even in the morphing of the existing plate element or surface element. In addition, the coil axis can be changed by changing the shape of the plate element that passes through the central axis of the winding shape.

  FIG. 2 is a functional block diagram showing the configuration of the morphing apparatus that executes the morphing method for the coil-shaped component according to the present embodiment. The morphing apparatus 100 includes a coil model holding unit 110, a center line / axis extraction unit 120, a line / beam element replacement unit 130, a plate / plane element generation unit 140, a deformation condition holding unit 150, a morphing execution unit 160, and a coil line extraction unit. 170 and a coil shape creation unit 180.

  The coil model holding unit 110 stores and holds a coil model. The center line / axis extraction unit 120 extracts the center line and the center axis of the coil from the coil shape held in the coil model holding unit 110. The line / beam element replacement unit 130 replaces the center line or the center axis of the coil extracted by the center line / axis extraction unit 120 with a line element or a beam element. The plate / surface element generation unit 140 generates a plate element or a surface element from the line element or beam element generated by the line / beam element replacement unit 130. The deformation condition holding unit 150 stores and holds deformation conditions in morphing. The morphing execution unit 160 acquires the deformation condition held in the deformation condition holding unit 150 and executes the morphing of the plate element or the surface element generated by the plate / surface element generation unit 140. The coil wire extraction unit 170 extracts a coil wire portion from the plate element or the surface element after morphing. The coil shape creation unit 180 creates a deformed coil shape from the coil wire portion extracted by the coil wire extraction unit 170.

  FIG. 3 is a flowchart for explaining the morphing method for the coil-shaped component according to the present embodiment. FIG. 4A is a diagram for explaining an extraction example of the coil center line and the coil axis line. When the process is started, the center line / axis extraction unit 120 first extracts the coil center line and the coil axis from the CAD data and FEM data of the coil shape held in the coil model holding unit 110 (S101). The obtained center line and axis are illustrated in FIG. Subsequently, the line / beam element replacement unit 130 replaces the extracted coil center line and coil axis with line elements or beam elements (S102). Thereby, shape data (GRID) is obtained (S103).

  Subsequently, the plate / surface element generation unit 140 generates a triangular patch surface from the initial state of the obtained shape data, and generates a plate element or a surface element from this triangular patch surface (S104). The generated plate element or surface element has, for example, a ribbon shape or a spiral shape. And the morphing execution part 160 acquires the deformation | transformation conditions currently hold | maintained at the deformation | transformation condition holding | maintenance part 150 (S105), and performs the morphing by an existing function (S106). Thereafter, the coil wire extraction unit 170 extracts the coil wire portion from the plate element or the surface element (S107), and the coil shape creation unit 180 creates the deformed coil shape (S108).

  FIG. 4B is a diagram showing an example of the morphing method for the coil-shaped component according to the present embodiment. As shown in FIG. 4B, according to the morphing method according to the present embodiment, it is possible to form a shape in which coil center lines are connected by plate elements or plane elements.

  As described above, in the morphing method for a coil-shaped part according to the present embodiment, a center line or a central axis is extracted from a coil model and is changed to a line element or a beam element, and the changed line element or beam element is used. Morphing is performed by automatically generating plate elements or surface elements. In a line element or a beam element, it is difficult to determine a normal vector necessary for judging continuity, and thus discontinuity has occurred in conventional morphing. On the other hand, according to the morphing method of the coil-shaped component according to the present embodiment, the continuity of the shape can be maintained by providing the above-described configuration. In addition, since plate elements or surface elements are automatically generated based on the center line extracted from the coil model and morphing is performed, the shape discontinuity due to morphing can be easily determined. Therefore, for example, with a coil-shaped component such as a coil spring, the winding shape can be changed easily and smoothly, that is, while maintaining continuity.

  The present invention is not limited to the above-described embodiments, and various modifications such as design changes can be added based on the knowledge of those skilled in the art, and the embodiments to which such modifications are added. Are also included within the scope of the present invention. New embodiments that are generated by modifying the above-described embodiments have the effects of the combined embodiments and modifications.

  10 line elements, 12 central axes, 20, 30 plate elements.

Claims (1)

  A coil characterized by extracting a center line or a center axis from a model of a coil and converting it to a line element or a beam element, and automatically generating a plate element or a surface element from the converted line element or beam element to perform morphing Morphing method for shape parts.