JP2004164364A - Generation system and generation method of molding of sensible form - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a generation system and generation method of a molding of sensible form that can induce a visual impression leading to a motivation for purchase, and a comfortable healing effect, in those who encounter manufactured moldings, by integrating article forms with 1/f fluctuation components at a design stage. <P>SOLUTION: The molding generation system 11 comprises a form data generation device 12 for integrating design data obtained from a basic form of a virtual three-dimensional article with separately obtained fluctuation factors to generate form data with fluctuations, a data conversion processing device 32 for converting the form data with fluctuations generated by the form data generation device 12 to STL format data, and a three-dimensional molding device 42 for generating an article form with fluctuations according to the STL data converted in the data conversion processing device 32. A molding of sensible form can be thus generated. <P>COPYRIGHT: (C)2004,JPO

Description

【００２０】
通常、１／ｆゆらぎを人為的に生成する場合には、上記式（１）の位置を表すパラメータｄの代わりに時間を表すパラメータｔを用いて、初期値ｘ_０（０＜ｘ_０＜１）を与え、時間ｔにおける値を求める。しかし、本発明では、時間変化する信号でなく、３次元形状にゆらぎ因子を組み込むため、時間軸の代わりに位置を示すベクトル軸を導入し、式（１）に示すように位置を表すパラメータｄを用いて、点ｄにおける値を求める。このとき、初期値ｘ_０＝０．８とした場合の計算結果（ゆらぎの波形）を図２として示す。また、図３は、図２で示した波形のパワースペクトル分布を示したものである。なお、図３における横軸の「周波数」は、１周の長さを基準とし、その測定基準長さを、繰り返される凹凸の周期の波長で割ったものを意味している。
【００２１】
形状データ生成手段２５は、造形物の製造段階に何らかのゆらぎ現象が起きるためにその形状もゆらぐものであると仮定し、この現象をシミュレートすることにより１／ｆゆらぎを造形物に付与するために用いられる。
【００２２】
この場合、ゆらぎ現象により造形物の形状がゆらぐという現象には、さまざまな態様が考えられるが、本発明においては、基本形状（仮想物品）をワイヤーフレームデータとして要素化し、これにゆらぎ成分を組み込む１次元的手法と、基本形状をサーフェスデータとして要素化し、これにゆらぎ成分を組み込む２次元的手法との二種類を採用している。
【００２３】
図４は、このうちの１次元的手法について示すものであり、まず、物品の基本形状を定めて仮想物品１５とし、該仮想物品１５の基準面から等間隔となるようにある厚さで輪切り（スライス）にして個々のスライス面１５ａ，１５ｂ，１５ｃ，・・・を形成する。
【００２４】
次に、ゆらぎを導入する流線１７を仮想物品１５の円周曲面１６上にらせん状に設定し、適宜の回数で周回させた流線１７とスライス面１５ａ，１５ｂ，１５ｃ，・・・の円周との交点１８の座標を１／ｆゆらぎに従って半径方向（円心方向）へと移動させて円周曲面上に凹凸をつける。
【００２５】
この場合、図２に示した波形からも明らかなように、上記式で求められる１／ｆゆらぎの波形は、点ｄの時の値と点ｄ_＋１の時の値との間には大きな隔たりがある場合が少なくない。
【００２６】
図４で示した１／ｆゆらぎの適用法は、１／ｆゆらぎの波形を基本形状である仮想物品１５の表面にそのまま凹凸として転写する手法である。このため、波形の中に見出されれる不連続な部分は、創成後の造形物の表面中において、局所的に曲率の変化した部分として現れてしまうことになる。
【００２７】
そこで、上記１次元的手法においては、１／ｆゆらぎの波形の特徴を損なうことなく、かつ、局所的に曲率が変化部分を少なくする方法として、次式に示す補間処理を施している。なお、この式において、ｖ_１，ｖ_２は頂点座標で、ｖは求める座標とする。
【００２８】
【数２】

【００２９】
図５は、他の一つである２次元的手法について例示するものであり、この例によれば、まず、型押し模様が規則正しく並べられた基本形状を定める。図５（ａ）によれば、基本形状１９は、底辺が正方形の四角錐２０を等間隔で押し当てた形となって用意される。
【００３０】
次に、この基本形状１９に１／ｆゆらぎを導入する。図５（ｂ）に示す例では、四角錐２０の頂点２１の座標をｘ，ｙ，ｚ方向のそれぞれにｄｘ，ｄｙ，ｄｚだけ移動させている。なお、１／ｆゆらぎはスカラー量であるから、１の頂点２１の移動量を計算するのには、ｄｘ，ｄｙ，ｄｚのそれぞれについて１／ｆゆらぎを適用したものを計算し、最終的に足し合わせ、三次元のベクトル量として扱うことになる。
【００３１】
図５（ｃ）は、図５（ａ）の基本形状１９に図５（ｂ）に示す１／ｆゆらぎを導入した後の型押し模様２２であり、規則的なデザインにありがちな画一的な視覚印象を防いだものとすることができる。
【００３２】
一方、図１におけるデータ変換処理装置３２は、３次元ＣＡＤ装置などからなるＳＴＬデータ作成手段３３とＳＴＬデータ入力手段３４とデータ処理手段３５とで構成されている。
【００３３】
ＳＴＬデータ作成手段３３で作成されるＳＴＬデータは、造形対象物の表面を微小な三角形平面（微小平面）の集合体とみなして造形対象物の形状を表現した形状データとして示される。この場合、個々の微小表面は、微小三角形を構成する３つの頂点と、三次元形状の内部方向を示す法線とによって定義付けられる。
【００３４】
すなわち、ＳＴＬデータは、図６に概念的に示してあるようにひとつの微小平面Ｐ１につき、法線ベクトルデータＤＮ１と第１頂点データＤＡ１と第２頂点データＤＡ２と第３頂点データＤＡ３とからなるデータを有している。同図に示すように他の微小平面Ｐ２，Ｐ３，・・・についても同様のデータを有している。
【００３５】
また、ＳＴＬデータ作成手段３３で作成されるＳＴＬデータには、図７に概念的に示されているように感性情報Ｆ１，Ｆ２，Ｆ３，・・・が付加される。なお、感性情報には、ゆらぎ因子生成手段１４により生成されるゆらぎ成分のほか、色彩情報のような感性に訴える他の情報も含めておくことができる。
【００３６】
ＳＴＬデータ入力手段３４は、作成されたＳＴＬデータを取得してこれを後段に用意されているデータ処理手段３５に送る。該データ処理手段３５は、送り込まれたＳＴＬデータに基づいてゆらぎ成分を含ませた造形対象物の形状を再現するための造形データを作成する。
【００３７】
図１における３次元造形装置４２は、駆動制御手段４３と図８に例示されているような造形手段４４とで構成されている。このうち、駆動制御手段４３は、演算制御部（ＣＰＵ）を備えており、データ変換処理装置３２の側から送り込まれた造形データに基づいて造形手段４４の駆動を制御し、このような駆動制御手段４３からの制御ものとで造形手段４４により積層造形プロセスが実行される。
【００３８】
図８は、粉末焼結法に適用される造形手段４４の装置構成例を示す説明図であり、この場合における造形手段４４は、窒素ガス雰囲気４６中に設置されている水平基台４７上に樹脂やセラミックスなどの適宜素材からなる粉末材料を供給する粉末カートリッジ４５と、水平基台４６上を転動して粉末薄層４９を形成するローラ４８と、粉末薄層４８における所定の焼結部位５０に走査ミラー５２を介してレーザビーム５３を照射してその照射領域を焼結するＣＯ_２レーザなどのレーザビーム発生器５１と、水平基台４７を昇降自在に下支えするピストンなどからなる昇降機構５４とを少なくとも備えている。
【００３９】
次に、第２の発明（造形物の創成方法）を上記した第１の発明（造形物の創成システム）の作用ととともに説明すれば、感性形状を付与した造形物の創成は、例えば図４（ａ）に示す３次元形状を呈する基本形状としての仮想物品１５や、図５（ａ）に示す基本形状１９から得られる設計データに別途取得されるゆらぎ因子を組み込ませてゆらぎを伴った形状データを生成する形状データ生成工程と、生成されたゆらぎを伴った前記形状データをＳＴＬ形式のデータに変換するデータ変換工程と、変換後の前記ＳＴＬデータに基づいてゆらぎを伴った３次元の物品形状を創成する形状創成工程とを少なくとも経ることにより行われる。
【００４０】
このうち、形状データ生成工程では、図１における基本形状設計手段１３を用いたコンピュータによる設計支援（ＣＡＤ）のもとで、ゆらぎ因子を含まない図４（ａ）に示す仮想物品１５や、図５（ａ）に示す基本形状１９について設計をまず行うことにより、その設計データを生成する。
【００４１】
また、形状データ生成工程では、ゆらぎ因子生成手段１４を用いることにより、上記式（１）に初期値ｘ_０（０＜ｘ_０＜１）を与え、順次計算によって点ｄにおける値について求める。例えば初期値ｘ_０＝０．８とした場合の計算結果であるゆらぎの波形は、図２に示すようにして人為的に生成されることになる。なお、図３は、図２で示した波形のパワースペクトル分布を示したものである。
【００４２】
さらに、形状データ生成工程では、このようにして得られた設計データにゆらぎ因子を組み込ませた形状データが図１における形状データ生成手段２５を用いて生成される。この場合における設計データにゆらぎ因子を組み込ませる手法には、図４（ａ）に示す基本形状としての仮想物品１５をワイヤーフレームデータとして要素化し、これにゆらぎ成分を組み込む１次元的手法と、図５（ａ）に示す基本形状１９をサーフェスデータとして要素化し、これにゆらぎ成分を組み込む２次元的手法との二種類があるが、これらについては既に詳しく説明してあるので、重複を避けるためにその説明を省略する。
【００４３】
次のデータ変換工程では、形状データ生成工程にて生成された形状データが、３次元ＣＡＤ装置などからなる図１に示すＳＴＬデータ作成手段３３を用いることにより、図６に示すＳＴＬデータにさらに感性情報Ｆ１，Ｆ２，Ｆ３，・・・をも付加された図７に示すＳＴＬデータへと変換される。
【００４４】
また、データ変換工程では、このようにして作成されたＳＴＬデータを、図１におけるＳＴＬデータ入力手段３４を用いて後段に用意されているデータ処理手段３５に送り、該データ処理手段３５を経ることによりＳＴＬデータに基づくゆらぎ成分を含ませた造形対象物の形状を再現するための造形データが作成される。
【００４５】
最終工程である形状創成工程では、駆動制御手段４３による駆動制御のもとで造形手段４４を駆動させることにより、データ変換工程を経ることで取り込まれた造形データに基づいて所定の積層造形プロセスが実行されることになる。
【００４６】
これを粉末焼結法に適用される図８に示す造形手段４４について説明すれば、粉末カートリッジ４５から窒素ガス雰囲気４６中の水平基台４７上に供給された粉末材料は、ローラ４８を転動させることにより粉末薄層４９とすることができる。
【００４７】
粉末薄層４９の所定の焼結部位５０には、走査ミラー５２を介してレーザビーム発生器５１からレーザビーム５３が照射され、その照射領域が焼結される。
【００４８】
第１回目の焼結作業を終えると、昇降機構５４を介して水平基台４７が所定位置にまで降下され、粉末薄層４９の所定の焼結部位５０にレーザビーム５３が照射されてその照射領域が焼結され、第２回目の焼結作業を終える。以下、同様の作業を繰り返すことにより、立体形状となって焼結された感性形状が付与された造形物を創成することができる。
【００４９】
図９は、図４に示す１次元的手法により仮想物品１５に１／ｆゆらぎを適用して感性形状を付与した後の形状をパターン別に示す説明図であり、そのうちの（ａ）は仮想物品１５の基本形状を、（ｂ）は２％ゆらぎ（流線１７を３回周回）の創成形状６１を、（ｃ）は５％ゆらぎ（流線１７を３回周回）の創成形状６２を、（ｄ）は３％ゆらぎ（流線１７を１２回周回）の創成形状６３をそれぞれ示す。
【００５０】
また、図１０（ｂ）は、図１０（ａ）に示す無地のカップからなる基本形状１９に対し、図５に示す２次元的手法により１／ｆゆらぎを適用して感性形状を付与した後の創成形状６５の一例を示す説明図である。
【００５１】
以上は、本発明の実施形態を図示例に即して説明したものであり、その具体的な実施の形態例はこれに限定されるものではない。例えば、造形手段は、光造形手法やインクジェット手法など、適宜の積層造形法に対応し得るように構成することができる。また、感性情報としては、感性に訴えるものであれば色彩情報などを組み込むことができるほか、各種の感性情報を組み合わせて用いることもできる。
【００５２】
【発明の効果】
以上述べたように本発明によれば、物品を設計する際に１／ｆゆらぎ成分をその形状に取り込んであるので、単なる工業製品からは感じ取ることができない強い購入意欲を感受させたり、心地よい癒し効果を感得させたりすることができる造形物を製品として創成することができる。
【００５３】
また、本発明における設計データへのゆらぎ因子の組み込み処理を、仮想物品の基本形状をらせん状のワイヤーフレームデータとして要素化した上で、ゆらぎ成分を組み込む１次元的手法により行う場合には、適宜の３次元形状を呈する物品形状に対し感性形状を付与することができる。
【００５４】
さらに、本発明における設計データへのゆらぎ因子の組み込み処理を、仮想物品の基本形状をサーフェスデータとして要素化した上で、ゆらぎ成分を組み込む２次元的手法により行う場合には、３次元形状を呈する各種の物品の表面や、布地などの各種の生地を含む２次元形状を呈する各種の物品の表面に対し好ましい感性形状を付与することができる。
【図面の簡単な説明】
【図１】本発明における第１の発明（造形物創成システム）の概略構成例を示すブロック図。
【図２】ゆらぎ波形の一例を示すグラフ図。
【図３】図２に示すゆらぎ波形のパワースペクトル分布図。
【図４】基本形状をワイヤーフレームデータとして要素化し、これにゆらぎ成分を組み込む１次元的手法を（ａ）〜（ｄ）として示す説明図。
【図５】基本形状をサーフェスデータとして要素化し、これにゆらぎ成分を組み込む２次元的手法を（ａ）〜（ｃ）として示す説明図。
【図６】ＳＴＬデータの概念図。
【図７】図６のＳＴＬデータの概念図に、さらに感性情報を付加したＳＴＬデータの概念図。
【図８】粉末焼結法のために用意される造形手段の装置構成例を示す説明図。
【図９】図４に示す１次元的手法により仮想物品に１／ｆゆらぎを適用して感性形状を付与した後の形状をパターン別に示す説明図であり、（ａ）は仮想物品の基本形状を、（ｂ）は２％ゆらぎの創成形状を、（ｃ）は５％ゆらぎの創成形状を、（ｄ）は３％ゆらぎの創成形状をそれぞれ示す。
【図１０】図５に示す２次元的手法により１／ｆゆらぎを適用して感性形状を付与した後の創成形状の一例を示す説明図であり、（ａ）は、無地のカップからなる基本形状図を、（ｂ）は、（ａ）の基本形状に１／ｆゆらぎを適用して感性形状を付与した後の創成形状をそれぞれ示す。
【符号の説明】
１１ 造形物創成システム
１２ 形状データ生成装置
１３ 基本形状設計手段
１４ ゆらぎ因子生成手段
１５ 仮想物品
１５ａ，１５ｂ，１５ｃ，・・・ スライス面
１６ 円周曲面
１７ 流線
１８ 交点
１９ 基本形状
２０ 四角錐
２１ 頂点
２２ 型押し模様
２３ 形状データ生成手段
３２ データ変換処理装置
３３ ＳＴＬデータ作成手段
３４ ＳＴＬデータ入力手段
３５ データ処理手段
４２ ３次元造形装置
４３ 駆動制御手段
４４ 造形手段
４５ 粉末カートリッジ
４６ 窒素ガス雰囲気
４７ 水平基台
４８ ローラ
４９ 粉末薄層
５０ 焼結部位
５１ レーザビーム発生器
５２ 走査ミラー
５３ レーザビーム
５４ 昇降機構
６１，６２，６３，６５ 創成形状[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention senses a strong willingness to purchase that cannot be perceived from a mere industrial product from an article commercialized as a shaped product by taking in a 1 / f fluctuation component when designing various article shapes including a tea set and the like. The present invention relates to a system for creating a shaped article having a sensible shape capable of causing a user to feel a comfortable healing effect and a technique for creating the same.
[0002]
[Prior art]
Conventionally, various additive manufacturing systems using a three-dimensional copy technology have been provided. Among them, a laser micro additive manufacturing method and apparatus using a fine powder tape (for example, see Patent Document 1) and an optical modeling There are also an apparatus and a stereolithography method (for example, see Patent Document 2).
[0003]
[Patent Document 1] JP-A-11-262657 [Patent Document 2] JP-A-2001-252886
Patent Literature 1 discloses a method of irradiating a laser beam to a surface of a fine powder tape formed by adding a binder to a metal fine powder or a mixed fine powder of a metal and a ceramic to form a laminated molded body composed of a metal or a metal and a ceramic. The technology is disclosed. According to the disclosed technology, it is said that a laminate molded body having a distinct heterogeneous phase or a molded body having a relatively complicated shape having a cavity can be relatively easily manufactured with high precision.
[0005]
Patent Literature 2 discloses a technique capable of realizing non-lamination modeling by surface exposure using a liquid crystal mask and visible light with high modeling flexibility, high accuracy, and high speed.
[0006]
On the other hand, some of the prior arts related to the 1 / f fluctuation component, which is considered to have a healing effect, include a 1 / f fluctuation component incorporated in an article shape so that a viewer can feel comfortable. For example, see Patent Document 3).
[0007]
[Patent Document 3] Japanese Patent No. 2775158
Patent Literature 3 discloses a technique relating to wallpaper that allows a viewer to feel comfort such as comfort by fluctuating the surface by 1 / f.
[0009]
[Problems to be solved by the invention]
However, Patent Documents 1 and 2 disclose a rapid prototyping technique typified by the additive manufacturing method, but when manufacturing it industrially, the functionality and cost are inevitably reduced. Will be pursued. In other words, industrial products manufactured by such a method tend to have a uniform appearance and an inorganic appearance in appearance, and have a willingness to purchase human beings in contact with this product that can be differentiated from other similar products. There was an inconvenience that it was difficult to give strong motivation that could be triggered.
[0010]
On the other hand, Patent Literature 3 discloses a wallpaper in which the surface is made to fluctuate by 1 / f so that a viewer can feel comfort such as a feeling of comfort. There is no versatility that can be applied to other articles, and the application area is narrow.
[0011]
SUMMARY OF THE INVENTION In view of the above-mentioned problems in the prior art, the present invention provides an incentive to purchase a 1 / f fluctuation component into its shape when designing an article, thereby motivating a person who comes into contact with a modeled product to purchase the product. It is an object of the present invention to provide a creation system and a creation method of a modeled object provided with a sensible shape capable of causing a visual impression and a comfortable healing effect.
[0012]
[Means for Solving the Problems]
The present invention has been made to achieve the above object, and the first invention (model creation system) of the first invention separately acquires design data obtained from a basic shape of a virtual article having a three-dimensional shape. A shape data generation device that incorporates a fluctuation factor to freely generate shape data with fluctuation, and freely converts the shape data with fluctuation generated by the shape data generation device into STL format data. Is characterized by at least comprising a data conversion processing device having the above configuration and a three-dimensional modeling device capable of freely creating an article shape with fluctuations based on the STL data converted by the data conversion processing device. .
[0013]
In the second invention (a method of creating a modeled object), shape data with fluctuation is generated by incorporating a separately obtained fluctuation factor into design data obtained from a basic shape of a virtual article having a three-dimensional shape. A shape data generation step, a shape data generation step of generating shape data with fluctuation by incorporating a fluctuation factor, and a data conversion step of converting the generated shape data with fluctuation to STL format data, A structural feature is that it includes at least a shape creation step of creating a three-dimensional article shape with fluctuations based on the converted STL data.
[0014]
In this case, the process of incorporating the fluctuation factor into the design data in the shape data generation step is performed by a one-dimensional method of incorporating the fluctuation component after the basic shape of the virtual article is made into spiral wire frame data. In addition, it is also possible to use a two-dimensional method that incorporates a fluctuation component after the basic shape of the virtual article is made into an element as surface data.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a block diagram showing a schematic configuration example of a first invention (modeled object creation system) according to the present invention. The entire modeled object creation system 11 includes a shape data generation device 12 and data conversion processing devices 32 and 3. And a three-dimensional modeling device 42.
[0016]
Among these, the shape data generating device 12 is designed to design a virtual article prepared as a basic shape and obtain design data of the virtual article, and a fluctuation factor generating means 14 for generating a fluctuation factor and acquiring the fluctuation factor. And a shape data generating means 25 for generating shape data obtained by incorporating a fluctuation factor into the design data obtained in this way.
[0017]
Among these, the basic shape design means 13 can design a virtual article as a basic shape that does not include a fluctuation factor under computer aided design (CAD), thereby generating design data of the virtual article. Is done.
[0018]
The fluctuation factor generating means 14 is used for artificially generating 1 / f fluctuation. Although it is possible to acquire 1 / f fluctuation existing in nature as data, it is possible at this time. Since the amount of data to be acquired is enormous, in the present invention, the 1 / f fluctuation waveform calculated by the following equation (1) is artificially generated and used.
[0019]
(Equation 1)

[0020]
Normally, when the 1 / f fluctuation is artificially generated, an initial value x ₀ (0 <x ₀ <1) is used by using a parameter t representing time instead of the parameter d representing the position in the above equation (1). ) To determine the value at time t. However, in the present invention, in order to incorporate a fluctuation factor into a three-dimensional shape instead of a time-varying signal, a vector axis indicating a position is introduced instead of a time axis, and a parameter d representing a position as shown in Expression (1). Is used to find the value at point d. FIG. 2 shows a calculation result (fluctuation waveform) when the initial value x ₀ = 0.8. FIG. 3 shows a power spectrum distribution of the waveform shown in FIG. Note that the “frequency” on the horizontal axis in FIG. 3 refers to a value obtained by dividing the measurement reference length by the wavelength of the period of the repeated unevenness with reference to the length of one circumference.
[0021]
The shape data generating means 25 assumes that the shape also fluctuates because some fluctuation phenomenon occurs in the manufacturing stage of the modeled object, and simulates this phenomenon to add 1 / f fluctuation to the modeled object. Used for
[0022]
In this case, various aspects can be considered as a phenomenon in which the shape of the modeled object fluctuates due to the fluctuation phenomenon. In the present invention, the basic shape (virtual article) is made into an element as wire frame data, and the fluctuation component is incorporated into this. Two types of methods are adopted: a one-dimensional method and a two-dimensional method in which a basic shape is converted into elements as surface data and a fluctuation component is incorporated into the element.
[0023]
FIG. 4 shows a one-dimensional method among them. First, the basic shape of the article is determined to be a virtual article 15, and the virtual article 15 is sliced at a certain thickness from the reference plane of the virtual article 15. (Slices) to form individual slice surfaces 15a, 15b, 15c,.
[0024]
Next, a streamline 17 for introducing a fluctuation is spirally set on the circumferential curved surface 16 of the virtual article 15, and the streamline 17 and the slice planes 15a, 15b, 15c,. The coordinates of the intersection 18 with the circumference are moved in the radial direction (in the direction of the center of the circle) in accordance with the 1 / f fluctuation to make the circumference curved.
[0025]
In this case, as is clear from the waveform shown in FIG. 2, the 1 / f fluctuation waveform obtained by the above equation has a large gap between the value at the point d and the value at the point d _{+ 1.} There are many cases.
[0026]
The method of applying the 1 / f fluctuation shown in FIG. 4 is a method of directly transferring the waveform of the 1 / f fluctuation as irregularities onto the surface of the virtual article 15 having the basic shape. For this reason, the discontinuous part found in the waveform will appear locally as a part with a changed curvature on the surface of the formed object after creation.
[0027]
Therefore, in the above-described one-dimensional method, an interpolation process represented by the following equation is performed as a method of locally reducing the portion where the curvature locally changes without impairing the characteristic of the waveform of 1 / f fluctuation. In this equation, v ₁ and v ₂ are vertex coordinates, and v is a coordinate to be obtained.
[0028]
(Equation 2)

[0029]
FIG. 5 illustrates another example of a two-dimensional method. According to this example, first, a basic shape in which embossed patterns are regularly arranged is determined. According to FIG. 5A, the basic shape 19 is prepared by pressing square pyramids 20 having a square base at equal intervals.
[0030]
Next, 1 / f fluctuation is introduced into the basic shape 19. In the example shown in FIG. 5B, the coordinates of the vertex 21 of the quadrangular pyramid 20 are moved in the x, y, and z directions by dx, dy, and dz, respectively. Since the 1 / f fluctuation is a scalar amount, in order to calculate the moving amount of one vertex 21, a value obtained by applying the 1 / f fluctuation to each of dx, dy, and dz is calculated, and finally, Additions are treated as three-dimensional vector quantities.
[0031]
FIG. 5C shows the embossed pattern 22 after the 1 / f fluctuation shown in FIG. 5B is introduced into the basic shape 19 of FIG. 5A, and is a uniform pattern that tends to be a regular design. It is possible to prevent a natural visual impression.
[0032]
On the other hand, the data conversion processing device 32 in FIG. 1 is composed of an STL data creating means 33, an STL data input means 34, and a data processing means 35, which are composed of a three-dimensional CAD device or the like.
[0033]
The STL data created by the STL data creating means 33 is represented as shape data expressing the shape of the object to be formed by regarding the surface of the object to be formed as an aggregate of minute triangular planes (small planes). In this case, each minute surface is defined by three vertices constituting a minute triangle and a normal line indicating the inside direction of the three-dimensional shape.
[0034]
That is, as shown conceptually in FIG. 6, the STL data includes normal vector data DN1, first vertex data DA1, second vertex data DA2, and third vertex data DA3 for one minute plane P1. Has data. As shown in the drawing, the other minute planes P2, P3,... Have similar data.
[0035]
Also, the STL data created by the STL data creation means 33 is added with sensibility information F1, F2, F3,... As conceptually shown in FIG. In addition to the fluctuation component generated by the fluctuation factor generation unit 14, other information that appeals to the sensitivity, such as color information, can be included in the sensitivity information.
[0036]
The STL data input means 34 acquires the created STL data and sends it to the data processing means 35 provided at the subsequent stage. The data processing means 35 creates modeling data for reproducing the shape of the modeling object including the fluctuation component based on the sent STL data.
[0037]
The three-dimensional modeling device 42 in FIG. 1 includes a drive control unit 43 and a modeling unit 44 as illustrated in FIG. The drive control means 43 includes an arithmetic control unit (CPU), and controls the drive of the shaping means 44 based on the shaping data sent from the data conversion processing device 32. The additive modeling process is executed by the modeling means 44 under the control of the means 43.
[0038]
FIG. 8 is an explanatory diagram showing an example of an apparatus configuration of the shaping means 44 applied to the powder sintering method. In this case, the shaping means 44 is placed on a horizontal base 47 installed in a nitrogen gas atmosphere 46. A powder cartridge 45 for supplying a powder material made of a suitable material such as resin or ceramic; a roller 48 for rolling on a horizontal base 46 to form a thin powder layer 49; A laser beam generator 51 such as a CO ₂ laser for irradiating a laser beam 53 to a laser beam 50 through a scanning mirror 52 to sinter the irradiated area, and a lifting mechanism including a piston for supporting a horizontal base 47 so as to be able to move up and down. 54 at least.
[0039]
Next, a description will be given of the second invention (method for creating a shaped object) together with the operation of the first invention (creation system for a shaped object) described above. A virtual article 15 as a basic shape having a three-dimensional shape shown in FIG. 5A and a shape with fluctuation by incorporating a separately obtained fluctuation factor into design data obtained from the basic shape 19 shown in FIG. A shape data generating step of generating data, a data converting step of converting the generated shape data with fluctuation into STL format data, and a three-dimensional article with fluctuation based on the converted STL data This is performed at least through a shape creation step of creating a shape.
[0040]
Among them, in the shape data generation step, under the design support (CAD) by a computer using the basic shape design means 13 in FIG. 1, the virtual article 15 shown in FIG. First, design data is generated by designing the basic shape 19 shown in FIG.
[0041]
In the shape data generation step, the initial value x ₀ (0 <x ₀ <1) is given to the above equation (1) by using the fluctuation factor generation means 14, and the value at the point d is obtained by sequential calculation. For example, a fluctuation waveform which is a calculation result when the initial value x ₀ = 0.8 is generated artificially as shown in FIG. FIG. 3 shows the power spectrum distribution of the waveform shown in FIG.
[0042]
Further, in the shape data generation step, shape data in which a fluctuation factor is incorporated in the design data obtained in this way is generated by using the shape data generation means 25 in FIG. In this case, a method of incorporating a fluctuation factor into the design data includes a one-dimensional method in which a virtual article 15 as a basic shape shown in FIG. 4A is made into elements as wire frame data and a fluctuation component is incorporated into the element. There are two types, a two-dimensional method in which the basic shape 19 shown in FIG. 5 (a) is elementized as surface data and a fluctuation component is incorporated into the element. These are already described in detail. The description is omitted.
[0043]
In the next data conversion step, the shape data generated in the shape data generation step is further sensitized to the STL data shown in FIG. 6 by using the STL data creation means 33 shown in FIG. The information is converted into STL data shown in FIG. 7 to which information F1, F2, F3,.
[0044]
In the data conversion step, the STL data created in this way is sent to the data processing means 35 provided at the subsequent stage using the STL data input means 34 in FIG. Thus, modeling data for reproducing the shape of the modeling object including the fluctuation component based on the STL data is created.
[0045]
In the shape creation step, which is the final step, by driving the modeling means 44 under the drive control of the drive control means 43, a predetermined additive manufacturing process is performed based on the modeling data captured through the data conversion step. Will be executed.
[0046]
This will be described with reference to the molding means 44 shown in FIG. 8 which is applied to the powder sintering method. The powder material supplied from the powder cartridge 45 onto the horizontal base 47 in the nitrogen gas atmosphere 46 rolls the rollers 48. By doing so, a thin powder layer 49 can be obtained.
[0047]
A predetermined sintered portion 50 of the thin powder layer 49 is irradiated with a laser beam 53 from a laser beam generator 51 via a scanning mirror 52, and the irradiated region is sintered.
[0048]
When the first sintering operation is completed, the horizontal base 47 is lowered to a predetermined position via the elevating mechanism 54, and a predetermined sintering portion 50 of the thin powder layer 49 is irradiated with the laser beam 53, and the irradiation is performed. The region is sintered and the second sintering operation is completed. Hereinafter, by repeating the same operation, it is possible to create a three-dimensionally shaped object to which a sintered shape is imparted.
[0049]
FIG. 9 is an explanatory diagram showing, by pattern, shapes after applying a 1 / f fluctuation to the virtual article 15 to give a sensible shape by the one-dimensional method shown in FIG. 4, in which (a) is a virtual article. 15 (b) shows a wound shape 61 with 2% fluctuation (circle stream line 17 three times), (c) a wound shape 62 with 5% fluctuation (circle stream line 17 three times), (D) shows the wound shape 63 with 3% fluctuation (streamline 17 circling 12 times).
[0050]
FIG. 10B shows a case where the 1 / f fluctuation is applied to the basic shape 19 made of a plain cup shown in FIG. 10A by the two-dimensional method shown in FIG. It is explanatory drawing which shows an example of the wound molding 65 of FIG.
[0051]
The embodiments of the present invention have been described with reference to the illustrated examples, and specific embodiments thereof are not limited thereto. For example, the shaping means can be configured to be compatible with an appropriate additive manufacturing method such as an optical shaping method or an inkjet method. In addition, as the sensibility information, color information or the like can be incorporated as long as it appeals to kansei, and various kansei information can be used in combination.
[0052]
【The invention's effect】
As described above, according to the present invention, when designing an article, the 1 / f fluctuation component is incorporated into the shape, so that a strong purchase willingness that cannot be sensed from a mere industrial product can be felt or a comfortable healing can be achieved. It is possible to create a shaped article that can make the user feel the effect as a product.
[0053]
In addition, when the process of incorporating the fluctuation factor into the design data in the present invention is performed by a one-dimensional method of incorporating the fluctuation component after the basic shape of the virtual article is made into a spiral wire frame data element. A sensible shape can be imparted to the article shape having the three-dimensional shape.
[0054]
Furthermore, when the process of incorporating the fluctuation factor into the design data according to the present invention is performed by a two-dimensional method of incorporating the fluctuation component after the basic shape of the virtual article is made into surface data as elements, the three-dimensional shape is exhibited. A favorable sensible shape can be imparted to the surface of various articles or the surface of various articles exhibiting a two-dimensional shape including various fabrics such as cloth.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a schematic configuration example of a first invention (modeled object creation system) according to the present invention.
FIG. 2 is a graph showing an example of a fluctuation waveform.
FIG. 3 is a power spectrum distribution diagram of the fluctuation waveform shown in FIG.
FIGS. 4A to 4D are explanatory diagrams showing a one-dimensional method in which a basic shape is elementized as wire frame data and a fluctuation component is incorporated into the element as wire frame data.
FIGS. 5A to 5C are explanatory diagrams showing a two-dimensional method in which a basic shape is elementized as surface data and a fluctuation component is incorporated into the element as surface data.
FIG. 6 is a conceptual diagram of STL data.
FIG. 7 is a conceptual diagram of STL data obtained by adding sensitivity information to the conceptual diagram of STL data of FIG. 6;
FIG. 8 is an explanatory view showing an example of an apparatus configuration of a shaping means prepared for a powder sintering method.
FIG. 9 is an explanatory diagram showing, by pattern, shapes after applying a 1 / f fluctuation to a virtual article to give a sensible shape by the one-dimensional method shown in FIG. 4, and FIG. 9 (a) is a basic shape of the virtual article; (B) shows a 2% fluctuation creation shape, (c) shows a 5% variation creation shape, and (d) shows a 3% variation creation shape.
FIG. 10 is an explanatory view showing an example of a wound-formed shape after giving a sensible shape by applying 1 / f fluctuation by the two-dimensional method shown in FIG. 5; FIG. (B) shows the wound shape after applying the 1 / f fluctuation to the basic shape of (a) to give a sensible shape.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 Modeling object creation system 12 Shape data generation device 13 Basic shape design means 14 Fluctuation factor generation means 15 Virtual articles 15a, 15b, 15c, ... Slice surface 16 Circular curved surface 17 Streamline 18 Intersection point 19 Basic shape 20 Square pyramid 21 Vertex 22 embossed pattern 23 shape data generating means 32 data conversion processing device 33 STL data generating means 34 STL data input means 35 data processing means 42 three-dimensional forming apparatus 43 drive control means 44 forming means 45 powder cartridge 46 nitrogen gas atmosphere 47 horizontal Base 48 Roller 49 Powder thin layer 50 Sintered portion 51 Laser beam generator 52 Scanning mirror 53 Laser beam 54 Lifting mechanism 61, 62, 63, 65

Claims (4)

A shape data generation device that incorporates a separately obtained fluctuation factor into design data obtained from a basic shape of a virtual article having a three-dimensional shape to freely generate shape data with fluctuation, and a shape data generation device A data conversion processing device that can freely convert shape data with fluctuations into STL format data, and can freely create an article shape with fluctuations based on the STL data converted by the data conversion processing device And a three-dimensional modeling apparatus configured as described above. A shape data generating step of generating shape data with fluctuation by incorporating a separately obtained fluctuation factor into design data obtained from a basic shape of a virtual article exhibiting a three-dimensional shape;
A data conversion step of converting the shape data with the generated fluctuation into STL format data;
At least a shape creation step of creating a three-dimensional article shape with fluctuations based on the converted STL data. The process of incorporating a fluctuation factor into design data in the shape data generating step is performed by a one-dimensional method of incorporating a fluctuation component after converting a basic shape of the virtual article into spiral wireframe data. 3. A method for creating a shaped article provided with the sensible shape according to 2. 3. The method according to claim 2, wherein the incorporation of the fluctuation factor into the design data in the shape data generation step is performed by a two-dimensional method of incorporating a fluctuation component after converting the basic shape of the virtual article into surface data. A method of creating a given shaped object.

Images