[특허]Compound curve-flat pattern process

[미국특허] Compound curve-flat pattern process 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B29C-017/04 B65H-081/00 B32B-031/00
출원번호	US-0402051 (1982-07-26)
발명자 / 주소	Williamson Robert D. (St. Charles MO) Furst Sidney M. (Maryland Heights MO)
출원인 / 주소	McDonnell Douglas Corporation (Long Beach CA 02)
인용정보	피인용 횟수 : 59 인용 특허 : 0

초록 ▼

Flat pattern equivalents for curved surfaces may be generated by developing a regular network of quadrilateral grid elements resembling a fish net which is mathematically smoothed onto the curved surface. Surface features such as boundaries and cutouts are mapped onto the network. The network is then transformed onto a flat mapping plane to form a grid in a manner analagous to smoothing a fish net mesh onto a flat surface. The surface features are then transformed to the flat surface grid. Individual plies or parts are then cut based upon the flat patterns. The plies or parts will conform to the curved surface exactly.

대표청구항 ▼

A process for forming an article comprising bonded multiple plies of a woven material arrayed to form a compound curved surface, the process comprising: forming a unique flat pattern equivalent for the compound curved surface for each ply wherein the flat pattern and the compound curved surface each have common reference means; forming each ply to correspond to its flat pattern equivalent; laying up the plies upon a tool which duplicates the compound curved surface wherein the plies and the tool also have the common reference means such that each ply is referenced to the common reference means on the tool; and bonding the plies together to form the article wherein said step of forming a unique flate pattern equivalent for the compound curved surface comprises: forming two tooling lines upon a portion of the surface such that the lines intersect within the boundaries of the portion; forming a surface grid of quadrilateral elements with identifiable points at the vertices of the elements upon the surface such that each of the points is separated from an adjacent point by an identical chordal distance, one such point being coincident with the intersection of the tooling lines, and two groups of such points being formed at consecutive said identical chordal distances along the tooling lines; marking the intersections of selected surface features of the portion of the surface with the surface grid; forming a flat pattern grid having a grid of quadrilateral elements having a grid spacing equal to the chordal distance; and, determining a flat pattern equivalent for the portion of the compound curved surface by translating the compound curved surface grid containing the marked intersections onto the flat pattern grid.

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Compound curve-flat pattern process 원문보기