Boots – shoes – and leggings
Patent
1995-12-29
1997-12-23
Voeltz, Emanual T.
Boots, shoes, and leggings
36447413, 36447429, 36446801, 36446824, 36446901, 36447409, 83 13, 83 39, 83 40, 83 55, 83 755, 83 49, 395118, 395141, 395142, 395143, G06F 1750, G06F 1900
Patent
active
057012512
DESCRIPTION:
BRIEF SUMMARY
1. Technical Field
The present invention relates to a blank-figure constructing method and system for sheet metal work and, more particularly, to a blank-figure constructing method and system which are adapted in use for sheet metal work to determine the positions of blanks on a sheet material to cut therefrom and to determine a passage for cutting the blanks.
2. Background Art
Japanese Patent Publication Laid-Open No. 5-19831 (1993) discloses a prior art blank-figure constructing method and system for use in sheet metal work. According to this publication, a multiple figure, which is composed of a plurality of figures corresponding to a plurality of desired metal blanks to be cut from a sheet material, is constructed on the sheet material such that the adjacent line segments of the figures corresponding to the blanks are combined as shown, for instance, in FIG. 3. When sequentially cutting the plurality of blanks from the sheet material, the cutting passage is determined such that priority is given to the longer line segment and further to a line segment closer to the presently cutting position.
In the above method and system, since a cutting passage is determined by simply giving precedence to a longer or nearer line segment, it is impossible to find a cutting passage which passes through all the internal and external line segments of the multiple figure in cases where the multiple figure has four vertices at each of which an odd number of internal and external line segments meet as shown, for instance, in FIG. 3 (this vertex is hereinafter referred to as "odd vertex"). In such cases, cutting cannot be continuously performed and therefore the initial operation of cutting (i.e., piercing etc.) has to be performed more than once, which limits the speed of the cutting operation.
The invention has been made in consideration of the foregoing problem and one of the objects of the invention is therefore to provide a blank-figure constructing method and system for sheet metal work, which enables continuous, high-speed cutting.
DISCLOSURE OF THE INVENTION
The above object can be achieved by a blank-figure constructing method for sheet metal work according to the invention, wherein a cutting passage planned to sequentially cut a plurality of desired blanks from a sheet material is determined, utilizing a multiple figure composed of the figures of the plurality of blanks to be obtained, in the multiple figure of which the adjacent line segments of the single blank figures are combined, if the multiple figure has an even number of, four or more odd vertices at each of which an odd number of internal and external line segments of the multiple figure meet, an auxiliary line is drawn outside the multiple figure, connecting any two of the odd vertices on the outline of the multiple figure to make the total number of odd vertices be two or zero so that the cutting passage, which passes through all the internal, external line segments and auxiliary line of the multiple figure, can be determined.
The above object can be also achieved by a blank-figure constructing system for sheet metal work according to the invention, wherein a cutting passage planned to sequentially cut a plurality of desired blanks from a sheet material is determined, utilizing a multiple figure composed of the figures of the plurality of blanks to be obtained, in the multiple figure of which the adjacent line segments of the single blank figures are combined, comprising auxiliary line drawing means for drawing an auxiliary line outside the multiple figure, if the multiple figure has an even number of, four or more odd vertices at each of which an odd number of internal and external line segments of the multiple figure meet, to connect any two of the odd vertices on the outline of the multiple figure so that the total number of odd vertices becomes two or zero, external line segments and auxiliary line of the multiple figure, is determined.
First of all, it should be noted that the cutting passage that passes through all the internal and external lin
REFERENCES:
patent: 3596068 (1971-07-01), Doyle
patent: 3803960 (1974-04-01), Pearl et al.
patent: 3864997 (1975-02-01), Pearl et al.
patent: 4469930 (1984-09-01), Takahashi
patent: 4706201 (1987-11-01), Kish et al.
patent: 5042339 (1991-08-01), Gerber
patent: 5134911 (1992-08-01), Busky et al.
patent: 5214590 (1993-05-01), Schnetzer
patent: 5231697 (1993-07-01), Yamada
patent: 5359872 (1994-11-01), Nashiki
Dam Tuan Q.
Kabushiki Kaisha Komatsu Seisakusho
Voeltz Emanual T.
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