JP2001254107A - Three-dimensional model structure and molding structure by photo-molding, and molding method by photo-molding - Google Patents
Three-dimensional model structure and molding structure by photo-molding, and molding method by photo-moldingInfo
- Publication number
- JP2001254107A JP2001254107A JP2000067991A JP2000067991A JP2001254107A JP 2001254107 A JP2001254107 A JP 2001254107A JP 2000067991 A JP2000067991 A JP 2000067991A JP 2000067991 A JP2000067991 A JP 2000067991A JP 2001254107 A JP2001254107 A JP 2001254107A
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- Japan
- Prior art keywords
- powder body
- base plate
- molding
- laser
- irradiated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Powder Metallurgy (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、粉末体にレーザを
照射してこれを焼結して造形物を製造する光造形装置で
造形物を製造する際に必要な三次元モデル構造、この三
次元モデルで製造された造形物構造、および造形物の造
形方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-dimensional model structure required for producing a molded article by an optical molding apparatus for producing a molded article by irradiating a powder body with a laser and sintering the same. The present invention relates to a structure of a model manufactured by an original model and a method of forming the model.
【０００２】[0002]
【従来の技術】金型等を製作する技術として、金属粉末
にレーザを照射することでこれを焼結して造形物を製作
する造形装置を用いる技術がある。図９は造形装置の一
例を示す説明図である。この造形装置では、造形するモ
デルの三次元データを基に積層厚毎の断面のスライスデ
ータを作成し、まず、昇降可能な造形側のプラットホー
ム１にスチールプレートを金属粉末で被覆したベースプ
レート２を乗せて、これを造形物３の土台とし、このベ
ースプレート２上に一層分の厚みで金属粉末４を供給側
のプラットフォーム５上からリコータ６により供給し、
前記作成したスライスデータでレーザ７を金属粉末４に
照射することで金属粉末４を焼結させ、第１層の金属粉
末層をスライスデータで特定される形状に硬化させると
ともに、第１層とベースプレート２を結合する。次に、
プラットホーム１を降下させ、１層分の厚みで新たに金
属粉末４を供給し、前記作成したスライスデータでレー
ザ７を金属粉末層に照射することで金属粉末を焼結し、
第２の層の金属粉末層をスライスデータで特定される形
状に硬化させるとともに、第１層と第２層を結合する。
この処理を繰り返して造形物３を製作する。2. Description of the Related Art As a technique for manufacturing a mold or the like, there is a technique using a molding apparatus for irradiating a metal powder with a laser and sintering it to produce a molded article. FIG. 9 is an explanatory diagram illustrating an example of a modeling apparatus. In this modeling apparatus, slice data of a cross section for each lamination thickness is created based on three-dimensional data of a model to be modeled, and first, a base plate 2 in which a steel plate is coated with metal powder is placed on a platform 1 on a modeling side that can be raised and lowered. Then, this is used as a base of the modeled object 3, and the metal powder 4 is supplied onto the base plate 2 with a thickness of one layer from the platform 5 on the supply side by the recoater 6,
The metal powder 4 is sintered by irradiating the metal powder 4 with the laser 7 based on the created slice data, and the first metal powder layer is hardened to a shape specified by the slice data. Combine two. next,
The platform 1 is lowered, a new metal powder 4 is supplied with a thickness of one layer, and the metal powder layer is sintered by irradiating a laser 7 to the metal powder layer with the created slice data,
The metal powder layer of the second layer is cured to a shape specified by the slice data, and the first and second layers are combined.
This process is repeated to produce the modeled object 3.
【０００３】この装置では、レーザの照射速度を低くす
ると、金属粉末が強く焼結することで造形物の密度が高
くなり、レーザの照射速度を上げると、金属粉末の焼結
が弱くなり、造形物の密度が低くなるものである。In this apparatus, when the laser irradiation speed is reduced, the density of the formed object is increased by strongly sintering the metal powder, and when the laser irradiation speed is increased, the sintering of the metal powder is weakened, and the molding is performed. The density of the object is reduced.
【０００４】[0004]
【発明が解決しようとする課題】上述したように、レー
ザによる金属粉末の焼結で成形金型の入れ駒を作成する
場合、造形時のレーザ照射で造形物表面で発生した熱が
冷えることで生じる収縮による内部応力で、第１層以降
の層にベースプレートに対して剥離方向の力が発生し、
造形物のコーナ部分がベースプレートと剥離し、反りが
発生してしまうことがあった。As described above, when a metal mold is formed by sintering a metal powder with a laser, the heat generated on the surface of the molded article by the laser irradiation during molding is cooled. Due to the internal stress caused by the shrinkage, a force in the peeling direction with respect to the base plate is generated in the first and subsequent layers,
In some cases, the corners of the modeled product were peeled off from the base plate, causing warpage.
【０００５】図１０は剥離発生の原理を示す説明図で、
まず、造形時のレーザ照射で造形物３表面には熱が発生
する。そして、この熱が冷えることで生じる収縮によ
り、造形物全体を曲げようとする力が発生する、これに
より、ベースプレート２に対して剥離方向の力が発生
し、造形物３のコーナ部分がベースプレート２と剥離し
てしまうものである。FIG. 10 is an explanatory view showing the principle of occurrence of peeling.
First, heat is generated on the surface of the modeled object 3 by laser irradiation at the time of modeling. The shrinkage caused by the cooling of the heat generates a force that bends the entire modeled object, thereby generating a force in the peeling direction with respect to the base plate 2 and causing the corner portion of the modeled object 3 to move to the base plate 2. And peel off.
【０００６】この傾向は、金型形状のように造形物の厚
さが厚くなるほど剥離荷重が大きくなるため、顕著であ
る。造形物を金型として使う場合、ベースプレートは入
れ駒の一部として利用するため、剥離が発生すると、必
要な強度が得られず、ベースプレートとの密着性も悪く
なり、最終的に全面が剥がれてしまう可能性があるとい
うこと、さらに、反りによる変形で寸法精度が悪くなる
ことから、剥離が発生した場合、再造形が必要であっ
た。[0006] This tendency is remarkable because the peeling load increases as the thickness of the molded article increases, as in the case of a mold. When using a molded object as a mold, the base plate is used as a part of the insert, so if peeling occurs, the required strength will not be obtained, the adhesion with the base plate will be poor, and the entire surface will eventually peel off Since there is a possibility, and the dimensional accuracy is deteriorated due to the deformation due to the warpage, it is necessary to remodel when peeling occurs.
【０００７】また、金型は、表面に巣があると、その巣
が成形品の表面に転写され、成形品の表面品質が悪くな
るとともに、金型表面の強度も落ちる。このため、金型
の表面は密度が高くなるようにしなければならない。そ
こで、金型を造形する際、表面を造形する際には、レー
ザの照射速度を低く、内部を造形する際にはレーザの照
射速度を高くして、表面は密度が高く、内部は密度の粗
い金型を作成することとして、造形時間が長くならない
ようにしている。[0007] Further, if the mold has a cavity on the surface, the cavity is transferred to the surface of the molded product, thereby deteriorating the surface quality of the molded product and decreasing the strength of the surface of the mold. For this reason, the surface of the mold must be dense. Therefore, when modeling a mold, the laser irradiation speed is low when modeling the surface, and the laser irradiation speed is high when modeling the inside, so that the surface has a high density and the inside has a low density. By making a rough mold, the molding time is not lengthened.
【０００８】しかしながら、このような２重構造となる
ように造形すると、表面と内部で密度差が大きくなり、
造形途中で応力による割れが発生することがある。ま
た、内部の造形時は、造形時間を短縮するため、２層に
１回ずつ照射するという技術も考えられているが、２層
に１回ずつの照射では上下の繋がりが弱くなり、表面に
割れが発生した場合、焼結金属は収縮する特性があるの
で繋がりが弱い部分で剥がれて引き裂かれることもあ
る。[0008] However, when the molding is performed to have such a double structure, the density difference between the surface and the inside becomes large,
Cracking due to stress may occur during molding. In addition, in order to shorten the molding time during internal modeling, a technique of irradiating once to two layers has been considered. However, once irradiating to two layers, the vertical connection is weakened, and When cracks occur, the sintered metal has the property of shrinking, so that it may be peeled and torn at a weakly connected portion.
【０００９】また、金型を２重構造とした場合、密度の
高い底面側では強い収縮が発生するため、やはりコーナ
部分がベースプレートから剥離しやすいものであった。Further, when the mold has a double structure, strong contraction occurs on the bottom surface side where the density is high, so that the corner portion is also easily peeled off from the base plate.
【００１０】[0010]
【課題を解決するための手段】上述した課題を解決する
ため、請求項１の発明は、造形するモデルの三次元デー
タから積層厚毎のスライスデータを作成しておき、ベー
スプレート上に粉末体を供給し、この粉末体に前記スラ
イスデータを基にレーザを照射して該粉末体を焼結して
ベースプレートと結合し、以降、順次粉末体の供給と焼
結を行って造形物を製作する造形装置を用いた光造形
で、造形物のモデルの三次元データに、造形物とベース
プレートの境界にテーパ状の剥離防止サポート形状を追
加することを特徴とする光造形による三次元モデル構造
である。In order to solve the above-mentioned problems, according to the first aspect of the present invention, slice data for each layer thickness is created from three-dimensional data of a model to be formed, and a powder body is placed on a base plate. Supplying, sintering the powder body by irradiating a laser based on the slice data to the powder body, bonding the powder body to a base plate, and thereafter sequentially supplying and sintering the powder body to form a shaped object This is a three-dimensional model structure by stereolithography in which stereolithography using an apparatus adds a tapered anti-peeling support shape at a boundary between a molded object and a base plate to three-dimensional data of a model of the molded object.
【００１１】請求項２の発明は、ベースプレート上に粉
末体を供給し、この粉末体にレーザを照射して該粉末体
を焼結してベースプレートと結合し、以降、順次粉末体
の供給と焼結を行って造形物を製作する造形装置を用い
た光造形による造形物構造において、造形物とベースプ
レートの境界にテーパ状の剥離防止サポート形状を一体
に造形したことを特徴とする光造形による造形物構造で
ある。According to a second aspect of the present invention, a powder body is supplied onto a base plate, and the powder body is irradiated with a laser to sinter the powder body and bond it to the base plate. An optical molding using a molding device that produces a molded object by sintering, in which the tapered peeling prevention support shape is integrally molded at the boundary between the molded object and the base plate. Object structure.
【００１２】請求項３の発明は、ベースプレート上に粉
末体を供給し、この粉末体にレーザを照射して該粉末体
を焼結してベースプレートと結合し、以降、順次粉末体
の供給と焼結を行って造形物を製作する造形装置を用い
た光造形による造形物構造において、造形物を内側から
外側に向かって複数領域に分割し、内側から外側に向か
って段階的に密度が高くなるように一体に造形したこと
を特徴とする光造形による造形物構造である。According to a third aspect of the present invention, a powder body is supplied onto a base plate, and the powder body is irradiated with a laser to sinter the powder body and bond it to the base plate. In a molded object structure by optical molding using a molding apparatus that produces a molded object by performing knotting, the molded object is divided into a plurality of regions from the inside to the outside, and the density gradually increases from the inside to the outside. This is a molded object structure by optical molding characterized by being integrally formed as described above.
【００１３】請求項４の発明は、請求項３の光造形によ
る造形物構造において、最下層から表面まで密度の高い
格子状の柱を一体に造形したことを特徴とする光造形に
よる造形物構造である。請求項５の発明は、ベースプレ
ート上に粉末体を供給し、この粉末体にレーザを照射し
て該粉末体を焼結してベースプレートと結合し、以降、
順次粉末体の供給と焼結を行って造形物を製作する造形
装置を用いた光造形による造形方法において、造形物の
表面から内側の所定領域は最も低速でレーザ照射を行
い、その内部を内側から外側に向かって複数領域に分割
し、その各領域に対してレーザ照射速度を外側から内側
に向けて段階的に速くするとともに、最下層から表面ま
で格子状のパターンでレーザの照射速度を遅くして格子
状の柱を造形することを特徴とする光造形による造形方
法である。According to a fourth aspect of the present invention, there is provided a stereolithographic structure according to the third aspect, wherein a lattice-like column having a high density is integrally formed from the lowermost layer to the surface. It is. The invention of claim 5 provides a powder body on a base plate, irradiates the powder body with a laser, sinters the powder body and combines it with the base plate,
In a molding method by optical molding using a molding device that sequentially supplies and sinters a powder body to produce a molded object, a predetermined region inside from the surface of the molded object is irradiated with laser at the lowest speed, and the inside is From the outside to the outside, the laser irradiation speed for each region is increased stepwise from the outside to the inside, and the laser irradiation speed is reduced in a grid pattern from the bottom layer to the surface. This is a shaping method by optical shaping characterized by forming a lattice-shaped pillar by performing the shaping.
【００１４】[0014]
【発明の実施の形態】図１は本発明の第１の実施の形態
を示す三次元モデル構造の一例を示す斜視図、図２は本
実施の形態の光造形の流れを示すフローチャート、図３
は第１の実施の形態における造形物の一例を示す説明図
であり、図２のフローの流れに従い、図１に示す三次元
モデル、図３に示す造形物の説明を行う。FIG. 1 is a perspective view showing an example of a three-dimensional model structure showing a first embodiment of the present invention, FIG. 2 is a flowchart showing a flow of stereolithography in the present embodiment, and FIG.
FIG. 3 is an explanatory diagram illustrating an example of a modeled object according to the first embodiment. The three-dimensional model illustrated in FIG. 1 and the modeled object illustrated in FIG. 3 will be described in accordance with the flow of the flow in FIG. 2.
【００１５】まず、造形物の三次元モデルを作成する
（ＳＡ１）。次に、この三次元モデルに、ベースプレー
トとの剥離防止サポート形状を追加する（ＳＡ２）。第
１の実施の形態において、造形物は、図３に示すよう
に、ベースプレート２と造形物３の境界に、テーパ状の
剥離防止サポート形状８が設けられるものであり、造形
時に、ベースプレート２と造形物３の境界に、この剥離
防止サポート形状８が造形されるように、図１に示すよ
うに、造形物３の三次元モデル３ａに剥離防止サポート
形状８を追加する。この剥離防止サポート形状８は、最
外形部から徐々に厚みが厚くなる形状が望ましく、ま
た、造形物３の形状が長方形の場合、各コーナに剥離防
止サポート形状８が形成されるようにする。なお、造形
物３自体の設計段階では、剥離防止サポート形状を考慮
することはなく、三次元モデル３ａ作成時に、造形物３
の形状、サイズに応じて剥離防止サポート形状８を付加
するものである。First, a three-dimensional model of a modeled object is created (SA1). Next, a support shape for preventing separation from the base plate is added to the three-dimensional model (SA2). In the first embodiment, as shown in FIG. 3, the formed object is provided with a tapered anti-peeling support shape 8 at the boundary between the base plate 2 and the formed object 3. As shown in FIG. 1, the separation preventing support shape 8 is added to the three-dimensional model 3 a of the modeled object 3 so that the separation preventing support shape 8 is formed at the boundary of the modeled object 3. Desirably, the shape of the anti-peeling support 8 gradually increases in thickness from the outermost portion. When the shape of the modeled object 3 is rectangular, the anti-peeling support shape 8 is formed at each corner. In the design stage of the modeled object 3, there is no need to consider the separation prevention support shape.
The separation prevention support shape 8 is added according to the shape and size of the support.
【００１６】次に、剥離防止サポート形状８を追加した
三次元モデル３ａから、スライスデータを作成する（Ｓ
Ａ３）。スライスデータを作成すると、レーザの照射速
度等、造形条件を設定する（ＳＡ４）。そして、上記作
成したデータを用いて、造形装置で造形を行う（ＳＡ
５）。Next, slice data is created from the three-dimensional model 3a to which the separation prevention support shape 8 is added (S
A3). When the slice data is created, modeling conditions such as a laser irradiation speed are set (SA4). Then, the modeling is performed by the modeling apparatus using the created data (SA
5).
【００１７】これにより、図３に示すような剥離防止サ
ポート形状８が設けられた造形物３が製作される。図４
は剥離荷重の分布を示す説明図で、図４（ａ）は剥離防
止サポート形状がある場合の剥離荷重の分布を示し、図
４（ｂ）は比較のため剥離防止サポート形状のない従来
の場合の剥離荷重の分布を示す。As a result, the modeled object 3 provided with the separation preventing support shape 8 as shown in FIG. 3 is manufactured. FIG.
Is an explanatory view showing the distribution of the peeling load. FIG. 4 (a) shows the distribution of the peeling load in the presence of the peeling prevention support shape, and FIG. 4 (b) shows the conventional case without the peeling prevention support shape for comparison. 2 shows the distribution of the peeling load of the sample.
【００１８】剥離防止サポート形状８を設ける場合、図
４（ａ）に示すように、造形開始時は、剥離防止サポー
ト形状８の最外形部は十分に薄いため、剥離荷重は小さ
くベースプレート２と十分に固着している。積層が進む
と、剥離荷重は剥離防止サポート形状８の厚みの増加に
従って徐々に大きくなって行くが、剥離防止サポート形
状８の最外形部が十分に固着しているため、剥離するこ
とはない。積層がさらに進み剥離防止サポート形状８の
ない部分となると、造形物３は剥離防止サポート形状８
と一体で造形しているため、充分ベースプレート２に固
着している剥離防止サポート形状８に支えられて、剥離
荷重は弱められる。When the peeling prevention support shape 8 is provided, as shown in FIG. 4 (a), at the start of modeling, since the outermost portion of the peeling prevention support shape 8 is sufficiently thin, the peeling load is small and the base plate 2 is sufficiently thin. It is stuck to. As the lamination proceeds, the peeling load gradually increases as the thickness of the peeling prevention support shape 8 increases, but since the outermost portion of the peeling prevention support shape 8 is sufficiently fixed, it does not peel. When the lamination further proceeds and becomes a portion without the peeling prevention support shape 8, the modeled object 3 becomes the peeling prevention support shape 8.
Since it is integrally formed with the base plate 2, the peeling load is weakened by being supported by the peeling prevention support shape 8 sufficiently fixed to the base plate 2.
【００１９】剥離防止サポート形状８がない場合、図４
（ｂ）に示すように、積層が進むと、造形物３の表面に
行くに従い剥離荷重が大きくなり、造形物３がベースプ
レート２から剥離しやすくなる。特に、コーナ部は剥離
荷重がより大きくなるので、より剥離しやすくなる。そ
こで、図３に示すように、各コーナに剥離防止サポート
形状８が形成されるようにすれば、剥離を防止すること
が可能となる。FIG.
As shown in (b), as lamination progresses, the peeling load increases toward the surface of the modeled object 3, and the modeled object 3 is easily separated from the base plate 2. In particular, the corner portion has a larger peeling load, and thus is more easily peeled. Therefore, as shown in FIG. 3, if the peeling prevention support shape 8 is formed at each corner, the peeling can be prevented.
【００２０】図５は本発明の第２の実施の形態における
造形物の一例を示す説明図で、図５（ａ）は平面断面
図、図５（ｂ）は側断面図である。図６は造形物の外観
斜視図で、第２の実施の形態の造形物３の外観は、その
一例として、表面に直方体の窪みがあり、さらにこの窪
みから２本の穴３ｂが設けられているもので、図５
（ａ）は図６の造形物３をＡ線で切断した平面断面図、
図５（ｂ）は図６の造形物３をＢ線で切断した平面断面
図である。この第２の実施の形態では、図２に示すフロ
ーＳＡ４の造形条件の設定において、レーザの照射速度
を内側から外側に向かって段階的に遅くする設定と、造
形物内部に格子状の柱を同時に造形する設定とを付加す
る。なお。第２の実施の形態では、剥離防止サポート形
状は付加しなくてもよい。FIG. 5 is an explanatory view showing an example of a molded article according to the second embodiment of the present invention. FIG. 5 (a) is a plan sectional view and FIG. 5 (b) is a side sectional view. FIG. 6 is a perspective view of the appearance of a molded article. As an example of the appearance of the molded article 3 according to the second embodiment, a rectangular parallelepiped dent is formed on the surface, and two holes 3b are provided from this dent. Figure 5
(A) is a cross-sectional plan view of the molded object 3 of FIG.
FIG. 5B is a plan cross-sectional view of the modeled object 3 of FIG. 6 taken along the line B. In the second embodiment, in setting the molding conditions of the flow SA4 shown in FIG. 2, the setting is such that the irradiation speed of the laser is gradually decreased from the inside to the outside, and a grid-like column is provided inside the molded object. At the same time, the setting for modeling is added. In addition. In the second embodiment, the separation prevention support shape may not be added.
【００２１】第２の実施の形態では、造形物３の内部
を、内側から外側に向かってコア９ａ、コア９ｂ、コア
９ｃと複数領域に分割し、コア９ｃの外側に造形物３の
表面となるスキン１０を造形するものである。さらに、
柱１１を、上面から見ると格子状に、かつ、ベースプレ
ート２からスキン１０の間を貫通して入れるものであ
る。In the second embodiment, the inside of the modeled object 3 is divided into a plurality of regions, that is, the core 9a, the core 9b, and the core 9c from the inside to the outside. This is for forming the skin 10 to be formed. further,
The pillars 11 are arranged in a lattice shape when viewed from above, and penetrate between the base plate 2 and the skin 10.
【００２２】図７および図８はレーザ速度別照射領域を
示す説明図で、以下に第２の実施の形態における造形条
件設定の詳細を説明する。なお、図７は図５に示す造形
物の各領域の平面断面図、図８は図５に示す造形物の各
領域の側断面図である。まず、図７（ａ）、図８（ａ）
に示すスキン１０の領域を指定し、底部の領域指定を削
除したスキン１０用造形データを作成する。次に、スキ
ン１０より内側部分に図７（ｂ）、図８（ｂ）に示すコ
ア９ｃの領域指定と、毎層レーザを照射する指定を行
い、底部の領域をスキン１０から削除した分下方へ延長
したコア９ｃ用造形データを作成する。次に、コア９ｃ
より内側部分に図７（ｃ）、図８（ｃ）に示すコア９ｂ
の領域指定と、毎層レーザを照射する指定を行い、コア
９ｂ用造形データを作成する。次に、コア９ｂより内側
部分に図７（ｄ）、図８（ｄ）に示すコア９ａの領域指
定と、毎層レーザを照射する指定を行い、コア４ａ用造
形データを作成する。FIG. 7 and FIG. 8 are explanatory views showing the irradiation area according to the laser speed. The details of the molding condition setting in the second embodiment will be described below. 7 is a plan sectional view of each region of the modeled object shown in FIG. 5, and FIG. 8 is a side sectional view of each region of the modeled object shown in FIG. First, FIGS. 7A and 8A
The area of the skin 10 shown in (1) is designated, and the modeling data for the skin 10 in which the area designation at the bottom is deleted is created. Next, the area of the core 9c shown in FIG. 7B and FIG. 8B and the specification of irradiating each layer of laser are performed on the inner side of the skin 10, and the bottom area is removed from the skin 10 by the amount removed. Then, the molding data for the core 9c which is extended is created. Next, the core 9c
The core 9b shown in FIG. 7C and FIG.
Is specified, and the specification of irradiating each layer of laser is performed to create the molding data for the core 9b. Next, the region designation of the core 9a shown in FIGS. 7D and 8D and the designation of irradiating each layer laser are performed on the inner portion of the core 9b to create the molding data for the core 4a.
【００２３】そして、スキン１０用造形データに最も遅
いレーザ照射速度を設定し、コア９ｃ、９ｂ、９ａの順
にスキン１０よりも速いレーザ照射速度を設定する。な
お、図７、図８では図示していないが、図５に示す格子
状の柱１１の部分も、スキン１０と同じ最も遅いレーザ
照射速度で造形する設定を行う。この設定で造形物を製
作すると、図５に示す造形物が得られる。Then, the slowest laser irradiation speed is set in the molding data for the skin 10, and the laser irradiation speed faster than the skin 10 is set in the order of the cores 9c, 9b, and 9a. Although not shown in FIGS. 7 and 8, the setting of forming the lattice-shaped pillar 11 shown in FIG. 5 at the same slowest laser irradiation speed as that of the skin 10 is performed. When a model is manufactured in this setting, a model shown in FIG. 5 is obtained.
【００２４】図５に示す造形物では、コア９ａからスキ
ン１０に向かって段階的にレーザの照射速度を遅くし、
密度を上げていくため、各領域間で密度差が極端に大き
くなることがなく、応力の影響による造形物の割れを防
止できる。これにより、スキン１０の密度をより高くす
ることが可能となり、表面の巣を減少させ、成形品表面
の品質を向上させることが可能となる。In the molded article shown in FIG. 5, the irradiation speed of the laser is gradually decreased from the core 9a toward the skin 10,
Since the density is increased, the difference in density between the regions does not become extremely large, and cracking of the modeled object due to the influence of stress can be prevented. Thereby, the density of the skin 10 can be further increased, the number of surface cavities can be reduced, and the quality of the molded product surface can be improved.
【００２５】また、造形物３の底部をコア９ｃの条件で
造形することで、強度は保ちつつ収縮を抑え、底部が収
縮する際の造形物３のコーナ部をひっぱり上げる力が緩
和され、ベースプレート２からの剥離を防止できる。さ
らに、コア９ａ〜９ｃは毎層レーザを照射することで上
下の層間での繋がりが強化され、さらに、密度の高い格
子状の柱１１を上下に入れることから、上下方向の繋が
りはより強化されて、内部での剥離がなくなるととも
に、上下方向の圧力に対する強度も増加する。Also, by shaping the bottom of the modeled object 3 under the conditions of the core 9c, the shrinkage is suppressed while maintaining the strength, and the force of pulling up the corner of the modeled object 3 when the bottom shrinks is reduced, and the base plate 2 can be prevented. Further, the cores 9a to 9c are connected to each other by irradiating a laser beam in each layer, whereby the connection between the upper and lower layers is strengthened. Further, since the high-density lattice-like pillars 11 are inserted vertically, the connection in the vertical direction is further strengthened. As a result, the internal peeling is eliminated and the strength against the vertical pressure is increased.
【００２６】なお、第２の実施の形態では、造形物３は
４重構造としたが、これに限るものではなく、造形物の
大きさ等を考慮して変更されるものである。上述した本
発明は、金属粉末を焼結して造形物を製造するものとし
て説明したが、他の樹脂を硬化させて造形する光造形技
術にも応用可能である。In the second embodiment, the modeled object 3 has a quadruple structure. However, the present invention is not limited to this, and may be changed in consideration of the size of the modeled object. Although the above-described present invention has been described as one in which a molded object is manufactured by sintering metal powder, the present invention can also be applied to an optical molding technology in which another resin is cured and molded.
【００２７】[0027]
【発明の効果】以上説明したように、本発明は、光造形
による造形物構造で、造形物とベースプレートの境界に
テーパ状の剥離防止サポート形状を一体に造形すること
としたので、境界面における剥離荷重の発生を抑え、ベ
ースプレートとの剥離や造形物の反りを抑えることがで
きる。As described above, according to the present invention, a tapered exfoliation prevention support shape is integrally formed at a boundary between a formed object and a base plate in a formed object structure by optical shaping. Generation of a peeling load can be suppressed, and peeling from the base plate and warpage of the formed object can be suppressed.
【００２８】また、本発明は、造形物を内側から外側に
向かって複数領域に分割し、内側から外側に向かって段
階的に密度が高くなるように一体に造形するとともに、
最下層から表面まで密度の高い格子状の柱を一体に造形
することとしたので、内部応力の発生を抑えつつ表面の
高密度化が図れるとともに、成形圧力による変形を抑え
ることができる。Further, according to the present invention, the molded object is divided into a plurality of regions from the inside to the outside, and integrally molded so that the density gradually increases from the inside to the outside.
Since the grid-like columns having a high density are integrally formed from the lowermost layer to the surface, it is possible to increase the density of the surface while suppressing the generation of internal stress and to suppress the deformation due to the molding pressure.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明の第１の実施の形態を示す三次元モデル
構造の一例を示す斜視図FIG. 1 is a perspective view showing an example of a three-dimensional model structure according to a first embodiment of the present invention.
【図２】本実施の形態の光造形の流れを示すフローチャ
ートFIG. 2 is a flowchart showing a flow of the optical molding according to the embodiment;
【図３】第１の実施の形態における造形物の一例を示す
説明図FIG. 3 is an explanatory diagram illustrating an example of a modeled object according to the first embodiment;
【図４】剥離荷重の分布を示す説明図FIG. 4 is an explanatory diagram showing a distribution of a peeling load.
【図５】本発明の第２の実施の形態における造形物の一
例を示す説明図FIG. 5 is an explanatory view showing an example of a modeled object according to a second embodiment of the present invention.
【図６】造形物の外観斜視図FIG. 6 is an external perspective view of a molded article.
【図７】レーザ速度別照射領域を示す説明図FIG. 7 is an explanatory diagram showing an irradiation area according to laser speed.
【図８】レーザ速度別照射領域を示す説明図FIG. 8 is an explanatory diagram showing an irradiation area according to laser speed.
【図９】造形装置の一例を示す説明図FIG. 9 is an explanatory view showing an example of a molding apparatus.
【図１０】剥離発生の原理を示す説明図FIG. 10 is an explanatory view showing the principle of occurrence of peeling.
２ ベースプレート ３ 造形物 ３ａ 造形物の三次元モデル ８ 剥離防止サポート形状 2 Base plate 3 Modeled object 3a 3D model of modeled object 8 Support shape for preventing peeling
Claims (5)
厚毎のスライスデータを作成しておき、ベースプレート
上に粉末体を供給し、この粉末体に前記スライスデータ
を基にレーザを照射して該粉末体を焼結してベースプレ
ートと結合し、以降、順次粉末体の供給と焼結を行って
造形物を製作する造形装置を用いた光造形で、造形物の
モデルの三次元データに、造形物とベースプレートの境
界にテーパ状の剥離防止サポート形状を追加することを
特徴とする光造形による三次元モデル構造。1. Slice data for each lamination thickness is prepared from three-dimensional data of a model to be formed, a powder body is supplied on a base plate, and a laser is irradiated to the powder body based on the slice data. The powder body is sintered and combined with the base plate, and thereafter, the powder body is supplied and sintered in sequence to produce a molded object by optical molding using three-dimensional data of a model of the molded object. A three-dimensional model structure by stereolithography characterized by adding a tapered anti-peeling support shape at a boundary between an object and a base plate.
の粉末体にレーザを照射して該粉末体を焼結してベース
プレートと結合し、以降、順次粉末体の供給と焼結を行
って造形物を製作する造形装置を用いた光造形による造
形物構造において、 造形物とベースプレートの境界にテーパ状の剥離防止サ
ポート形状を一体に造形したことを特徴とする光造形に
よる造形物構造。2. A powder body is supplied onto a base plate, and the powder body is irradiated with a laser to sinter the powder body and bond it to the base plate. Thereafter, the powder body is sequentially supplied and sintered to perform modeling. What is claimed is: 1. A stereolithographic structure using a stereolithography method using a molding apparatus for manufacturing a product, wherein a tapered anti-peeling support shape is integrally formed at a boundary between the molded object and a base plate.
の粉末体にレーザを照射して該粉末体を焼結してベース
プレートと結合し、以降、順次粉末体の供給と焼結を行
って造形物を製作する造形装置を用いた光造形による造
形物構造において、 造形物を内側から外側に向かって複数領域に分割し、内
側から外側に向かって段階的に密度が高くなるように一
体に造形したことを特徴とする光造形による造形物構
造。3. A powder body is supplied onto a base plate, and the powder body is irradiated with a laser to sinter the powder body and bond it to the base plate. In the structure of a molded object by optical molding using a molding device that manufactures an object, the molded object is divided into multiple areas from the inside to the outside, and integrally molded so that the density gradually increases from the inside to the outside The object structure by stereolithography characterized by doing.
したことを特徴とする光造形による造形物構造。4. The structure according to claim 3, wherein a lattice-like column having a high density is integrally formed from the lowermost layer to the surface.
の粉末体にレーザを照射して該粉末体を焼結してベース
プレートと結合し、以降、順次粉末体の供給と焼結を行
って造形物を製作する造形装置を用いた光造形による造
形方法において、 造形物の表面から内側の所定領域は最も低速でレーザ照
射を行い、その内部を内側から外側に向かって複数領域
に分割し、その各領域に対してレーザ照射速度を外側か
ら内側に向けて段階的に速くするとともに、最下層から
表面まで格子状のパターンでレーザの照射速度を遅くし
て格子状の柱を造形することを特徴とする光造形による
造形方法。5. A powder body is supplied onto a base plate, and the powder body is irradiated with a laser to sinter the powder body and bond it to the base plate. In a shaping method by optical shaping using a shaping apparatus for manufacturing an object, a predetermined region inside from the surface of the formed object is irradiated with laser at the lowest speed, the inside is divided into a plurality of regions from the inside to the outside, and the The laser irradiation speed is gradually increased from the outside to the inside in each region, and the laser irradiation speed is reduced in a grid pattern from the bottom layer to the surface to form grid columns. Molding method by stereolithography.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000067991A JP4337216B2 (en) | 2000-03-13 | 2000-03-13 | Modeling method by stereolithography and stereolithography by stereolithography |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000067991A JP4337216B2 (en) | 2000-03-13 | 2000-03-13 | Modeling method by stereolithography and stereolithography by stereolithography |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2008260109A Division JP4983768B2 (en) | 2008-10-06 | 2008-10-06 | Modeling method by stereolithography |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001254107A true JP2001254107A (en) | 2001-09-18 |
| JP4337216B2 JP4337216B2 (en) | 2009-09-30 |
Family
ID=18587103
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|---|---|---|---|
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| Country | Link |
|---|---|
| JP (1) | JP4337216B2 (en) |
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| JP2007062050A (en) * | 2005-08-29 | 2007-03-15 | Shiyoufuu:Kk | Shaping data forming system, manufacturing method and shape data forming program |
| US7255830B2 (en) | 2002-09-30 | 2007-08-14 | Matsushita Electric Works, Ltd. | Method of making a three-dimensional sintered product |
| JP2010100883A (en) * | 2008-10-22 | 2010-05-06 | Panasonic Electric Works Co Ltd | Method for producing three-dimensionally shaped object |
| JP2010196099A (en) * | 2009-02-24 | 2010-09-09 | Panasonic Electric Works Co Ltd | Apparatus and method of producing three-dimensional shaped article |
| JP2013163829A (en) * | 2012-02-09 | 2013-08-22 | Panasonic Corp | Method of manufacturing three-dimensionally shaped article, and three-dimensionally shaped article |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7255830B2 (en) | 2002-09-30 | 2007-08-14 | Matsushita Electric Works, Ltd. | Method of making a three-dimensional sintered product |
| JP2007062050A (en) * | 2005-08-29 | 2007-03-15 | Shiyoufuu:Kk | Shaping data forming system, manufacturing method and shape data forming program |
| JP2010100883A (en) * | 2008-10-22 | 2010-05-06 | Panasonic Electric Works Co Ltd | Method for producing three-dimensionally shaped object |
| JP2010196099A (en) * | 2009-02-24 | 2010-09-09 | Panasonic Electric Works Co Ltd | Apparatus and method of producing three-dimensional shaped article |
| JP2013163829A (en) * | 2012-02-09 | 2013-08-22 | Panasonic Corp | Method of manufacturing three-dimensionally shaped article, and three-dimensionally shaped article |
| JP2014226780A (en) * | 2013-05-17 | 2014-12-08 | シーメット株式会社 | Optical shaping method |
| JP2017517409A (en) * | 2014-11-14 | 2017-06-29 | スリーディー システムズ インコーポレーテッド | Method to resist stress during 3D printing |
| WO2018175739A1 (en) * | 2017-03-23 | 2018-09-27 | Carbon, Inc. | Lip supports useful for making objects by additive manufacturing |
| JP2020512215A (en) * | 2017-03-23 | 2020-04-23 | カーボン，インコーポレイテッド | Lip support useful for making objects by additive manufacturing |
| RU2688098C1 (en) * | 2018-08-10 | 2019-05-17 | Федеральное государственное бюджетное образовательное учреждение высшего образования Балтийский государственный технический университет "ВОЕНМЕХ" им. Д.Ф. Устинова (БГТУ "ВОЕНМЕХ") | Method for laser layer-by-layer synthesis of bulk articles from powders |
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