JP4779596B2 - Bending method of steel of bead sheet material to install rubber sonar dome of ship. - Google Patents
Bending method of steel of bead sheet material to install rubber sonar dome of ship. Download PDFInfo
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- JP4779596B2 JP4779596B2 JP2005338667A JP2005338667A JP4779596B2 JP 4779596 B2 JP4779596 B2 JP 4779596B2 JP 2005338667 A JP2005338667 A JP 2005338667A JP 2005338667 A JP2005338667 A JP 2005338667A JP 4779596 B2 JP4779596 B2 JP 4779596B2
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Description
この発明は、船舶のゴム製ソーナードームを取付けるビードシート材料の鋼材の曲げ加工方法に係わり、更に詳しくは大型で、肉厚の板状の鋼材を所定の形状に切削加工すると共に曲げ加工する船舶のゴム製ソーナードームを取付けるビードシート材料の鋼材の曲げ加工方法に関するものである。 This invention relates to a bending method of the steel bead sheeting attaching the rubber sonar dome of a ship, more particularly large, vessels bending with cutting a plate-shaped steel material thickness into a predetermined shape The present invention relates to a method of bending a steel material of a bead sheet material to which a rubber sonar dome is attached .
従来、図9に示すように観測船1等の船首側におけるゴム製ソーナードーム2を取付けるためのビードシート3は、直線形状部分と曲面形状部分とから構成され、曲面形状部分については曲率半径Rが大きく、しかも肉厚が100mm程度であることから鋳物により製作しているのが一般的である(例えば、特許文献1参照)。なお、図10において、5はビードクランプ、6はフェアーリングプレートを示している。
Conventionally, as shown in FIG. 9, a
然しながら、ビードシート3を鋳物により製作した場合には、以下のような問題点があった。
(a).鋳造用の模型が必要なため、模型費用がかかる。
(b).鋳物の中に微小欠陥が混在し易いため、浸透探査検査、X線検査が必要であり検査費用がかかる。
(c).X線検査でも発見し難い微小欠陥が多数発生した場合、それらを補修する工程があり多くの手間と時間がかかる。
(a). Model cost is required because a model for casting is required.
(b) Since minute defects are likely to be mixed in the casting, penetration inspection and X-ray inspection are necessary, and inspection costs are incurred.
(c). When a large number of minute defects that are difficult to find by X-ray inspection occur, there is a process for repairing them, which takes a lot of time and effort.
この発明はかかる従来の問題点に着目し、模型費用や補修費用を考慮することなく、しかも浸透探査検査やX線検査等を行わずに高品質で低コストで製品を製造することが出来る船舶のゴム製ソーナードームを取付けるビードシート材料の鋼材の曲げ加工方法を提供することを目的とするものである。 Vessels The present invention according focuses on conventional problems, without considering the model cost and repair costs, yet can be manufactured product at a low cost with high quality without penetration probing test or X-ray inspection It is an object of the present invention to provide a method for bending a steel material of a bead sheet material to which a rubber sonar dome is attached .
この発明は上記目的を達成するため、予め、曲面加工する板状の鋼材の三次元キャド図を平面図に展開し、この展開図から前記鋼材の概略形状を形成するための削り代を設定した後、曲げ加工前の形状を決定し、このように決定した曲げ加工前の形状の三次元キャド図のデータに基づき、工作機械により鋼材から削り代を削り出して概略形状を加工した後、鋼材を曲面形状に曲げ加工し、曲げ加工後に曲面形状を維持させるために拘束リブを取付けた後、鋼材の回りを溶断して最終加工を行うことをことを要旨とするものである。 In order to achieve the above object, the present invention has previously developed a three-dimensional CAD diagram of a plate-shaped steel material to be curved into a plan view, and set a cutting allowance for forming a schematic shape of the steel material from this development view. After that, after determining the shape before bending , based on the data of the three-dimensional CAD diagram of the shape before bending determined in this way , after cutting out the machining allowance from the steel with a machine tool, In order to maintain the curved surface shape after bending, a constraining rib is attached, and then the final processing is performed by fusing around the steel material.
ここで、前記板状の鋼材が、船舶のゴム製ソナードームを取付けるビードシート材料であり、前記板状の鋼材は、厚さ100mm〜150mmの鋼板である。 Here, the plate-shaped steel material is a bead sheet material for mounting a rubber sonar dome of a ship, and the plate-shaped steel material is a steel plate having a thickness of 100 mm to 150 mm.
このように、ビードシート材料を従来の鋳物製品から鋼材の製品にして加工することで、模型費用や補修費用を考慮することなく、しかも浸透探査検査やX線検査等を行わずに高品質で低コストで製品を製造することが出来るものである。 In this way, by processing the bead sheet material from a conventional casting product to a steel product, it is possible to achieve high quality without considering model costs or repair costs, and without performing penetration inspection or X-ray inspection. The product can be manufactured at low cost.
この発明は、上記のように予め、曲面加工する板状の鋼材の三次元キャド図を平面図に展開し、この展開図から前記鋼材の概略形状を形成するための削り代を設定した後、曲げ加工前の形状を決定し、このように決定した曲げ加工前の形状の三次元キャド図のデータに基づき、工作機械により鋼材から削り代を削り出して概略形状を加工した後、鋼材を曲面形状に曲げ加工し、曲げ加工後に曲面形状を維持させるために拘束リブを取付けた後、鋼材の回りを溶断して最終加工を行うようにしたので、以下のような優れた効果を奏するものである。
(1).鋳造用の模型が必要でないため、模型費用や、欠陥が発生した際の補修費等を考慮に入れて作業を行う必要がない。
(2).製品の微小欠陥等の浸透探査検査やX線検査が必要でなく、検査費用を削減することが出来る。
(3).鋳物製品に比べて高品質で、しかも生産性が高く、低コストで製作することが可能となる。
This invention, in advance as described above, after expanding the three-dimensional cad diagram of the plate-shaped steel material to be curved surface processing in a plan view, after setting the cutting allowance to form the schematic shape of the steel material from this development view, After determining the shape before bending, based on the 3D CAD data of the shape before bending determined in this way , the machining allowance is cut out from the steel with a machine tool and the rough shape is processed. Bending into a shape, and after attaching a restraining rib to maintain the curved shape after bending, the area around the steel material is melted and the final processing is performed, so the following excellent effects are achieved. is there.
(1) Since a casting model is not required, it is not necessary to take into account the cost of the model and the repair cost when a defect occurs.
(2) Penetration exploration inspection and X-ray inspection such as micro defects of products are not necessary, and inspection costs can be reduced.
(3) Higher quality and higher productivity than cast products, and can be manufactured at low cost.
以下、添付図面に基づき、この発明の実施形態を説明する。なお、以下の説明において、従来例と同一構成要素は同一符号を付して説明は省略する。 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, the same components as those in the conventional example are denoted by the same reference numerals, and the description thereof is omitted.
図1は、船体1の船首側におけるビードシート3のコーナ部取付け構造の一部拡大断面図を示し、この発明の実施形態では、コーナR部のビードシート3を厚さ100mm〜150mmの鋼材により曲げ加工して製作している。
FIG. 1 shows a partially enlarged cross-sectional view of a corner portion mounting structure of a
このコーナR部のビードシート3の製作は、図2〜図5に示すように、予め、図2に示すように曲面加工する板状の鋼材Wの三次元キャド図S(三次元コンピュータ支援設計図S)を図3に示すように平面図Saに展開し、この展開図Saから前記鋼材Wの概略形状を形成するための削り代Kを設定して曲げ加工前の形状を決定する。
As shown in FIGS. 2 to 5, the
次いで、このような三次元キャドデータ(三次元コンピュータ支援設計図のデータ)をNC工作機械に制御装置(コンピュータ)にデータを入力し、三次元キャドデータに基づき、前記NC工作機械等により鋼材Wから削り代Kを削り出して概略製品形状に加工する。 Next, such three-dimensional CAD data ( data of a three-dimensional computer-aided design drawing ) is input to a control device (computer) into an NC machine tool, and the steel material W is processed by the NC machine tool or the like based on the three-dimensional CAD data. Then, the machining allowance K is cut out and processed into an approximate product shape.
そして、概略製品形状に加工した後、鋼材Wを図4に示すように曲面形状に曲げ加工し、曲げ加工後に曲面形状を維持させるために図5に示すように拘束リブGを取付け、更に図6〜図7に示すように、鋼材Wの回りを溶断して最終加工を行って鋼材Wから成るビードシート3を製造するものである。
And after processing into a rough product shape, the steel material W is bent into a curved surface shape as shown in FIG. 4, and a restraining rib G is attached as shown in FIG. As shown in FIGS. 6 to 7, the
なお、この実施形態の試作では長さ1500mm,厚さ75mmのビードシート3を製造する場合、縦×横×厚さは、3500mm×1050mm×90mmの鋼材Wを用意して切削加工を行った。また、曲面形状に曲げ加工する場合、この実施形態の試作では、2500R(mm)の寸法で曲げ加工を行った。
In the trial production of this embodiment, when manufacturing a
以上のように、この発明の実施形態では、船舶のゴム製ソーナードームを取付けるビードシート材料を、予め、曲面加工する板状の鋼材Wの三次元キャド図を平面図に展開し、この展開図から前記鋼材Wの概略形状を形成するための削り代Kを設定した後、曲げ加工前の形状を決定し、このような三次元キャドデータに基づき、工作機械により鋼材Wから削り代Kを削り出して概略形状を加工した後、鋼材Wを曲面形状に曲げ加工し、曲げ加工後に曲面形状を維持させるために拘束リブGを取付けた後、鋼材Wの回りを溶断して最終加工を行うようにしたので、従来の鋳物製品のような模型費用や補修費用を考慮することなく、しかも浸透探査検査やX線検査等を行わずに高品質で低コストで製品を製造することが出来るものである。 As described above, in the embodiment of the present invention, a bead sheet material for mounting a rubber sonar dome of a ship is developed in advance in a plan view of a three-dimensional CAD figure of a plate-like steel material W to be curved. After setting the machining allowance K for forming the rough shape of the steel material W, the shape before bending is determined, and the machining allowance K is cut from the steel material W by a machine tool based on such three-dimensional CAD data. After the rough shape is processed, the steel material W is bent into a curved surface shape, and after the bending process, the restraining rib G is attached to maintain the curved surface shape, and then the periphery of the steel material W is melted and the final processing is performed. As a result, it is possible to manufacture products with high quality and low cost without considering model costs and repair costs like conventional casting products, and without performing penetration inspection and X-ray inspection. is there.
1 潜水艦
2 ラバーウィンド
3 ビードシート
5 ビードクランプ
6 フェアーリングプレート
S 三次元キャド図
Sa 三次元キャドの平面図
W 鋼材
K 削り代
G 拘束リブ
1
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