JP2006161910A - Tank manufacturing method - Google Patents

Tank manufacturing method Download PDF

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JP2006161910A
JP2006161910A JP2004352294A JP2004352294A JP2006161910A JP 2006161910 A JP2006161910 A JP 2006161910A JP 2004352294 A JP2004352294 A JP 2004352294A JP 2004352294 A JP2004352294 A JP 2004352294A JP 2006161910 A JP2006161910 A JP 2006161910A
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tank
metal plate
manufacturing
plate
circular hole
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JP3892868B2 (en
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Takashi Kawamura
尚 川村
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HANKEN SEISAKUSHO KK
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a tank manufacturing method for improving the internal cleanliness of a tank in the processes of manufacturing the tank. <P>SOLUTION: A non-continuous circular hole 4 is cut and formed in one metal plate 1a with a laser beam while leaving at least two small joint portions 5. A tank semi-finished product is manufactured with assembling, welding and before-coating polishing work between the metal plate 1a and another metal plate. Then, a circular plate 6 inside the non-continuous circular hole 4 is separated from the small joint portions 5 to be torn off to form a tank opening portion. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、タンクの製造方法に係り、より詳しくは、建設機械に使用される作動油タンク等のタンクの製造方法に関する。   The present invention relates to a method for manufacturing a tank, and more particularly, to a method for manufacturing a tank such as a hydraulic oil tank used for a construction machine.

従来、建設機械や自動車等に使用される、種々の燃料タンクや作動油タンクが提案されている（例えば、特許文献１参照）。
特許文献１には、開口縁にフランジ部を有する一対の容器を、金属板から形成し、各容器のフランジ部同士を溶接したタンクの製造方法が開示されている。
特開２００３−２１０１２号公報 Conventionally, various fuel tanks and hydraulic oil tanks used for construction machines and automobiles have been proposed (see, for example, Patent Document 1).
Patent Document 1 discloses a method for manufacturing a tank in which a pair of containers having flange portions at opening edges is formed from a metal plate and the flange portions of the containers are welded to each other.
Japanese Patent Laid-Open No. 2003-2102

しかしながら、上記特許文献１に開示されたような従来のタンクの製造方法では、タンクを組立製造する過程に於て、燃料取出用やガス抜き用やタンク内部点検用等に形成されたタンク開口部に蓋がされていなかった。このため、従来では、タンクが完成品となるまでにタンク内にごみが侵入し易く、タンク内部の清浄度を向上することが困難であるという問題点があった。具体的には、タンク開口部周りに部品を溶接にて取付ける際には、スパッタがタンク開口部からタンク内に侵入するという問題点があった。また、タンク表面をサンダーで研磨する際には、サンダーの砥石粉や鉄粉等がタンク開口部からタンク内に侵入するという問題点があった。油圧機器に於ては、このようなスパッタや砥石粉や鉄粉等のごみは、大敵である。従って、従来は、タンクの洗浄に多くの時間を要していた。 そこで、本発明は、タンクが完成品となるまでの製造過程におけるタンク内の清浄度の向上を図り得るタンクの製造方法を提供することを目的とする。   However, in the conventional tank manufacturing method as disclosed in Patent Document 1, in the process of assembling and manufacturing the tank, a tank opening formed for fuel extraction, gas venting, tank internal inspection, etc. The lid was not covered. For this reason, conventionally, there has been a problem that it is difficult for dust to enter the tank before the tank becomes a finished product, and it is difficult to improve the cleanliness inside the tank. Specifically, when components are attached around the tank opening by welding, there is a problem that spatter enters the tank from the tank opening. Further, when the tank surface is polished with a sander, there is a problem that the grinding stone powder or iron powder of the sander enters the tank from the tank opening. In hydraulic equipment, dust such as spatter, grinding stone powder, and iron powder is a great enemy. Therefore, conventionally, it took a lot of time to clean the tank. Then, an object of this invention is to provide the manufacturing method of the tank which can aim at the improvement of the cleanliness in a tank in the manufacture process until a tank becomes a finished product.

上記の目的を達成するために、本発明に係るタンクの製造方法は、少なくとも一枚の金属板に、レーザービームによって２箇所以上の微小ジョイント部が残るように非連続円形孔を切断形成し、該金属板及び別の金属板の組立作業と溶接作業と塗装前研磨作業とを行なってタンク半製品を製作し、その後、上記微小ジョイント部を引きちぎるように上記非連続円形孔内側の円形板を分離してタンク開口部を形成するものである。
また、上記非連続円形孔のスリット幅は、 0.1〜 0.3mmに設定されている。
また、上記微小ジョイント部の幅は、 1.0〜 2.7mmに設定されている。
また、上記金属板の板厚は、 3.0〜10.0mmである。
また、上記微小ジョイント部は、２箇所に形成され、隣り合う２個の該微小ジョイント部の成す中心角度をθとすると、 100°≦θ≦ 170°に設定されている。 In order to achieve the above object, the method for manufacturing a tank according to the present invention cuts and forms a discontinuous circular hole on at least one metal plate so that two or more micro joint portions remain by a laser beam, A semi-finished tank product is manufactured by assembling, welding and pre-painting polishing of the metal plate and another metal plate, and then the circular plate inside the non-continuous circular hole is formed so as to tear the micro joint part. It separates and forms a tank opening part.
The slit width of the non-continuous circular hole is set to 0.1 to 0.3 mm.
Further, the width of the minute joint portion is set to 1.0 to 2.7 mm.
The metal plate has a thickness of 3.0 to 10.0 mm.
The minute joint portions are formed at two locations, and the angle of 100 ° ≦ θ ≦ 170 ° is set, where θ is the central angle formed by two adjacent minute joint portions.

本発明のタンクの製造方法によれば、タンク開口部周りの部品の溶接によるスパッタ等のごみや、表面を研磨する際に発生するサンダーの砥石粉や鉄粉等のごみが、タンク開口部からタンク内に侵入するのを防止することができ、タンクの製造過程におけるタンク内の清浄度の向上を図ることができる。従って、その後の洗浄作業が短時間で済み、タンク内のごみ等の残留の確率を低下させることができる。   According to the method for manufacturing a tank of the present invention, dust such as spatter due to welding of parts around the tank opening, and dust such as sander grinding stone powder and iron powder generated when polishing the surface are discharged from the tank opening. Intrusion into the tank can be prevented, and the cleanliness of the tank in the tank manufacturing process can be improved. Accordingly, the subsequent cleaning operation can be completed in a short time, and the probability of remaining dust in the tank can be reduced.

以下、実施の形態を示す図面に基づき、本発明を詳説する。
本発明の実施の一形態に係るタンクの製造方法は、図１に於て示されるような、例えば建設機械に使用される作動油用タンク30等を製造するための方法である。
図１〜図３に於て、この作動油用タンク30は、複数の金属板１，１を折曲げたり相互に溶接したりして箱状とされている。具体的には、これら複数の金属板１，１は、タンクの上面及び側面を形成する金属板１ａやタンクの下面及び側面を形成する金属板１ｂ等から構成されている。 Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments.
A tank manufacturing method according to an embodiment of the present invention is a method for manufacturing a hydraulic oil tank 30 used in, for example, a construction machine, as shown in FIG.
1 to 3, the hydraulic oil tank 30 is formed into a box shape by bending a plurality of metal plates 1 and 1 or welding them together. Specifically, the plurality of metal plates 1 and 1 are constituted by a metal plate 1a that forms the upper and side surfaces of the tank, a metal plate 1b that forms the lower and side surfaces of the tank, and the like.

作動油用タンク30を形成するこれら複数の金属板１ａ，１ｂの材質には、例えば鉄鋼が使用される。金属板１ａ，１ｂの板厚ｔは、 3.0〜10.0mmであるものが好ましく使用され、例えば６mmとされる。
また、作動油用タンク30には、作動油の取出口やガス抜き口あるいはタンク内部の点検口等が設けられ、これらは、所定の金属板１にタンク開口部２を設けて形成されている。本実施形態では、タンク開口部２は、作動油用タンク30の上面側を形成する金属板１ａに、２個設けられている。
各タンク開口部２の周囲には、タンク開口部２と同心円状に、略円環状のベース部10が溶接にて固着されている。このベース部10には、取付蓋部12が固着具にて取り付けられ、通常時にタンク開口部２を塞ぐ構造となっている。 As the material of the plurality of metal plates 1a and 1b forming the hydraulic oil tank 30, for example, steel is used. The thickness t of the metal plates 1a and 1b is preferably 3.0 to 10.0 mm, for example, 6 mm.
Further, the hydraulic oil tank 30 is provided with a hydraulic oil outlet, a gas vent or an inspection port inside the tank, and these are formed by providing a tank opening 2 on a predetermined metal plate 1. . In the present embodiment, two tank openings 2 are provided on the metal plate 1 a that forms the upper surface side of the hydraulic oil tank 30.
Around each tank opening 2, a substantially annular base 10 is fixed by welding concentrically with the tank opening 2. An attachment lid 12 is attached to the base 10 with a fixing tool, and the tank opening 2 is normally closed.

次に、図２〜図９に於て、上述した構造の作動油用タンク30を製造する方法を説明する。
まず、図２及び図３に示すように、所定の大きさの金属板１ａ及び金属板１ｂを用意する。
次に、金属板１ａにタンク開口部２，２を形成するための切断作業を行なう。この加工では、図４に示すように、金属板１ａを、ノズル部13から照射されるレーザービーム40によって２箇所の微小ジョイント部５，５が残るように非連続円形孔４に切断形成する。このとき、非連続円形孔４の内側には微小ジョイント部５，５にて非連続円形孔４の外側と連結される円形板６が形成される。本実施形態では、金属板１ａの中央付近に２個の大小の非連続円形孔４，４を形成する。この際、図５に示すように、非連続円形孔４，４のスリット幅Ｇは、 0.1〜 0.3mmに設定するのが好ましく、例えば0.15mmとされる。
また、微小ジョイント部５，５は、隣り合う２個の該微小ジョイント部５，５の成す中心角度をθとすると、 100°≦θ≦ 170°に設定するのが好ましく、例えばθ＝60°とされる。また、この微小ジョイント部５，５の幅Ｗは、 1.0〜 2.7mmに設定するのが好ましく、例えば 1.7mmとされる。 Next, a method for manufacturing the hydraulic oil tank 30 having the above-described structure will be described with reference to FIGS.
First, as shown in FIGS. 2 and 3, a metal plate 1a and a metal plate 1b having a predetermined size are prepared.
Next, a cutting operation for forming the tank openings 2 and 2 in the metal plate 1a is performed. In this processing, as shown in FIG. 4, the metal plate 1 a is cut and formed in the discontinuous circular hole 4 so that the two micro joint portions 5 and 5 remain by the laser beam 40 irradiated from the nozzle portion 13. At this time, a circular plate 6 connected to the outside of the non-continuous circular hole 4 is formed inside the non-continuous circular hole 4 at the minute joint portions 5 and 5. In this embodiment, two large and small non-continuous circular holes 4 and 4 are formed near the center of the metal plate 1a. At this time, as shown in FIG. 5, the slit width G of the non-continuous circular holes 4 and 4 is preferably set to 0.1 to 0.3 mm, for example, 0.15 mm.
The micro joint portions 5 and 5 are preferably set to 100 ° ≦ θ ≦ 170 °, where θ is the central angle formed by two adjacent micro joint portions 5 and 5, for example, θ = 60 ° It is said. The width W of the micro joint portions 5 and 5 is preferably set to 1.0 to 2.7 mm, for example, 1.7 mm.

次に、図６に示すように、金属板１ａ，１ｂを門型に折曲げて組立てる組立作業を経た後、金属板１ａ，１ｂ同士を相互に溶接により接合する溶接作業に入る。このとき、非連続円形孔４，４が形成された金属板１ａは上側、もう一方の金属板１ｂは下側に位置するように組み合わされ、これらが溶接にて接合されて箱状とされる。   Next, as shown in FIG. 6, after the assembly work of bending and assembling the metal plates 1a and 1b into a gate shape, the welding operation of joining the metal plates 1a and 1b together by welding is started. At this time, the metal plate 1a in which the non-continuous circular holes 4 and 4 are formed is combined so that the other metal plate 1b is located on the upper side, and these are joined together by welding to form a box shape. .

次に、図７に示すように、溶接作業に於て、各非連続円形孔４に対して包囲状となるように、略円環状のベース部10を溶接にて金属板１ａに固着する。このとき、溶接棒15が非連続円形孔４，４の近くに位置するので、多くのスパッタ16…が飛び散る（流れる）が、非連続円形孔４，４の隙間は微小であるので、スパッタ16…が非連続円形孔４，４を通じてタンクの外部空間Ｏからタンクの内部空間Ｉに侵入する確率が著しく低下する。
また、このベース部10の溶接により、図５の非連続円形孔４のスリット幅Ｇはより小さくなる（例えば、0.15mmから 0.1mmとなる）。 Next, as shown in FIG. 7, in the welding operation, a substantially annular base portion 10 is fixed to the metal plate 1a by welding so as to surround each non-continuous circular hole 4. At this time, since the welding rod 15 is located near the non-continuous circular holes 4 and 4, a lot of spatters 16 scatter (flow), but the gap between the non-continuous circular holes 4 and 4 is very small, so the spatter 16 ... Through the non-continuous circular holes 4 and 4 significantly decreases the probability of entering the internal space I of the tank.
Further, the slit width G of the non-continuous circular hole 4 in FIG. 5 becomes smaller (for example, from 0.15 mm to 0.1 mm) by welding the base portion 10.

次に、図８に示すように、塗装作業に入る前にタンクの表面を研磨する、塗装前研磨作業に入る。この塗装前研磨作業は、サンダー18を用いて行なわれる。このとき、多くの砥石粉（や鉄粉）17…等が空気中に浮遊するが、非連続円形孔４，４の隙間は微小であるので、スパッタ16…が非連続円形孔４，４を通じてタンクの外部空間Ｏからタンクの内部空間Ｉに侵入する確率が著しく低下する。   Next, as shown in FIG. 8, the pre-painting polishing operation is started, in which the surface of the tank is polished before the painting operation is started. This pre-painting polishing operation is performed using the sander 18. At this time, many grinding stone powders (and iron powders) 17 etc. float in the air, but since the gaps between the non-continuous circular holes 4 and 4 are very small, the sputters 16 are passed through the non-continuous circular holes 4 and 4. The probability of entering the internal space I of the tank from the external space O of the tank is significantly reduced.

上記切断作業、組立作業、溶接作業、及び、塗装前研磨作業を行なった段階で、タンクは、タンク半製品Ｃとなる。
そして、図９に示すように、タンク半製品Ｃを製作したその後、微小ジョイント部５，５を引きちぎるように各非連続円形孔４内側の円形板６を分離する。この円形板６の分離は、例えば吸着マグネット19を使用して円形板６を吸着させて行なう。このようにして、タンク開口部２，２が形成される。
各非連続円形孔４内側の円形板６を分離し、タンク開口部２，２を形成した後は、洗浄作業と塗装作業に入り、その後、各ベース部10に取付蓋部12を固着具にて取り付けてタンク開口部２，２を塞ぎ、完成品となる。 The tank becomes a tank semi-finished product C at the stage where the cutting operation, the assembly operation, the welding operation, and the pre-painting polishing operation are performed.
Then, as shown in FIG. 9, after the tank semi-finished product C is manufactured, the circular plate 6 inside each non-continuous circular hole 4 is separated so as to tear off the minute joint portions 5 and 5. The separation of the circular plate 6 is performed by attracting the circular plate 6 using, for example, an attracting magnet 19. In this way, the tank openings 2 and 2 are formed.
After separating the circular plate 6 inside each non-continuous circular hole 4 and forming the tank openings 2, 2, the cleaning operation and the painting operation are started, and then the mounting lid 12 is attached to each base portion 10 as a fixture. And the tank openings 2 and 2 are closed to complete the finished product.

以上の作業手順により、作動油用タンク30が形成されるが、もう一度、各タンク開口部２を形成するまでの流れを簡潔に述べると次のようになる。即ち、（少なくとも一枚の）金属板１ａに、レーザービーム40によって２箇所以上の微小ジョイント部５が残るように非連続円形孔４を切断形成し、金属板１ａ及び別の金属板１ｂの組立作業と溶接作業と塗装前研磨作業とを行なってタンク半製品Ｃを製作し、その後、微小ジョイント部５を引きちぎるように非連続円形孔４内側の円形板６を分離してタンク開口部２を形成する。   The hydraulic oil tank 30 is formed by the above operation procedure. The flow until the tank openings 2 are formed once again is briefly described as follows. That is, the discontinuous circular hole 4 is cut and formed on the (at least one) metal plate 1a by the laser beam 40 so that two or more minute joint portions 5 remain, and the metal plate 1a and another metal plate 1b are assembled. The tank semi-finished product C is manufactured by performing the work, the welding work, and the pre-painting polishing work, and then the tank plate 2 is separated by separating the circular plate 6 inside the non-continuous circular hole 4 so as to tear the minute joint part 5. Form.

金属板１ａ，１ｂの板厚ｔ、及び非連続円形孔４，４のスリット幅Ｇ、各非連続円形孔４の微小ジョイント部５，５の幅Ｗは、上述の範囲内に於て自由に変更することができるが、例えば、微小ジョイント部５，５の幅Ｗや板厚ｔが過小である場合、円形板６を引きちぎるのに必要な強度が過小となり、意図しない円形板６の分離が発生する虞れがある。また、微小ジョイント部５，５の幅Ｗが過大である場合には、円形板６を引きちぎるのに必要な強度が過大となり、円形板６を引きちぎる作業が煩雑になる。
また、スリット幅Ｇが過大である場合、溶接作業や塗装前研磨作業を行う間に於て、スパッタ16…等のごみや、砥石粉（や鉄粉）17…等のごみが、タンク開口部２，２からタンク内に侵入するのを効果的に抑制するのが困難となる。また、スリット幅Ｇが過小である場合、レーザービーム40による金属板１ａの切断作業に精度が必要以上に要求され、加工時間や加工コストが大きなものとなる。 The thickness t of the metal plates 1a and 1b, the slit width G of the non-continuous circular holes 4 and 4, and the width W of the minute joint portions 5 and 5 of each non-continuous circular hole 4 are freely within the above-mentioned range. For example, when the width W and the thickness t of the micro joint portions 5 and 5 are too small, the strength necessary for tearing the circular plate 6 becomes too small, and unintended separation of the circular plate 6 may occur. May occur. In addition, when the width W of the micro joint portions 5 and 5 is excessive, the strength necessary for tearing the circular plate 6 becomes excessive, and the work of tearing the circular plate 6 becomes complicated.
In addition, when the slit width G is excessively large, dust such as spatter 16 and so on and grinding stone powder (and iron powder) 17 and so on are collected in the tank opening during welding work and pre-painting polishing work. It becomes difficult to effectively suppress the entry from 2 and 2 into the tank. Further, when the slit width G is too small, the cutting work of the metal plate 1a by the laser beam 40 is required more than necessary, and the processing time and processing cost become large.

従って、各寸法を、これらのことを考慮して決定する必要があり、例えば表１に示す１〜３の組合せに設定するのが好ましいが、勿論これらに限られない。   Therefore, it is necessary to determine each dimension in consideration of these matters. For example, it is preferable to set the dimensions to the combinations 1 to 3 shown in Table 1, but it is not limited thereto.

Figure 2006161910
Figure 2006161910

なお、本発明は、上述の実施の形態に限定されず、本発明の要旨を逸脱しない範囲で設計変更可能である。例えば、金属板１ａを、レーザービーム40によって２箇所の微小ジョイント部５，５が残るように非連続円形孔４に切断したものに限るのではなく、３箇所以上の微小ジョイント部５…を設けるも好ましい。
また、非連続円形孔４を形成した金属板１ａと別の金属板１ｂとを折曲げ接合して箱状とするものに限るのではなく、３つ以上の金属板を折曲げて接合して箱状とするも好ましい。また、折り曲げずにそのまま接合してもよい。
また、非連続円形孔４を形成した金属板１ａを一枚とするものに限るのではなく、非連続円形孔４を形成した金属板１ａを複数枚使用して箱状とし、最終的に多くのタンク開口部を設けるようにするも好ましい。
また、タンク半製品Ｃを製作するまでに、組立作業，溶接作業，塗装前研磨作業のみを行なうものに限るのではなく、他の作業を加えてもよい。
また、金属板１の材質は、鉄鋼に限るのではなく、他の材料を用いてもよい。 The present invention is not limited to the above-described embodiment, and the design can be changed without departing from the gist of the present invention. For example, the metal plate 1a is not limited to the one cut into the discontinuous circular hole 4 so that the two micro joint portions 5 and 5 remain by the laser beam 40, but three or more micro joint portions 5 are provided. Is also preferable.
In addition, the metal plate 1a having the discontinuous circular hole 4 and another metal plate 1b are not bent and joined to form a box shape, but three or more metal plates are folded and joined. A box shape is also preferable. Moreover, you may join as it is, without bending.
In addition, the metal plate 1a formed with the non-continuous circular holes 4 is not limited to one, but a plurality of metal plates 1a formed with the non-continuous circular holes 4 are used to form a box shape. It is also preferable to provide a tank opening.
Further, before the semi-finished tank product C is manufactured, not only the assembly work, the welding work, and the pre-painting polishing work are performed, but other work may be added.
Moreover, the material of the metal plate 1 is not limited to steel, and other materials may be used.

以上のように本発明に係るタンクの製造方法は、（少なくとも一枚の）金属板１ａに、レーザービーム40によって２箇所以上の微小ジョイント部５が残るように非連続円形孔４を切断形成し、金属板１ａ及び別の金属板１ｂの組立作業と溶接作業と塗装前研磨作業とを行なってタンク半製品Ｃを製作し、その後、微小ジョイント部５を引きちぎるように非連続円形孔４内側の円形板６を分離してタンク開口部２を形成するので、組立作業と溶接作業と塗装前研磨作業とを行う間に於て、本来は廃材となる円形板６をそのままの形で残して、円形板６がタンク開口部２を覆う蓋の機能を有するように構成することができる。これにより、タンク開口部２周りにベース部10等の部品を溶接する際に発生する、スパッタ16等の直接的にタンク開口部２から侵入しようとするごみや、タンク表面をサンダー18にて研磨する際に発生する、砥石粉（や鉄粉）17等の空気中を浮遊して間接的にタンク開口部２から侵入しようとするごみが、タンク内に侵入するのを防止することができる。その結果、タンクの製造過程におけるタンク内の清浄度の向上を図ることができる。従って、その後の洗浄作業が短時間で済み、タンク内のごみ等の残留の確率を低下させることができる。   As described above, the method for manufacturing a tank according to the present invention cuts and forms the discontinuous circular holes 4 on the (at least one) metal plate 1a so that two or more micro joint portions 5 remain by the laser beam 40. The tank half product C is manufactured by performing assembly work, welding work, and pre-painting polishing work of the metal plate 1a and another metal plate 1b, and then the inside of the non-continuous circular hole 4 so as to tear off the minute joint portion 5. Since the tank opening 2 is formed by separating the circular plate 6, during the assembly operation, the welding operation and the pre-painting polishing operation, the circular plate 6 which is originally a waste material is left as it is. The circular plate 6 can be configured to have the function of a lid that covers the tank opening 2. As a result, the sander 18 is used to grind the dust that is generated when welding the parts such as the base 10 around the tank opening 2 and the surface of the tank, such as spatter 16, entering the tank opening 2 directly. It is possible to prevent dust that floats in the air such as grindstone powder (or iron powder) 17 and so on from entering the tank opening 2 from entering the tank. As a result, it is possible to improve the cleanliness of the tank in the tank manufacturing process. Accordingly, the subsequent cleaning operation can be completed in a short time, and the probability of remaining dust in the tank can be reduced.

また、金属板１ａをレーザービーム40によって切断して非連続円形孔４を形成するので、スリット幅が小さく切断面が綺麗なスリット状の非連続円形孔４を容易に形成することができる。これにより、他の切断方法と比較して、非連続円形孔４のスリット幅Ｇを容易に小さく設定することができ、スパッタ16等のごみや、砥石粉（や鉄粉）17等のごみが、タンク開口部２からタンク内に侵入するのをより効果的に抑制することができる。   Moreover, since the metal plate 1a is cut by the laser beam 40 to form the non-continuous circular holes 4, the slit-shaped non-continuous circular holes 4 having a small slit width and a beautiful cut surface can be easily formed. Thereby, compared with other cutting methods, the slit width G of the non-continuous circular hole 4 can be easily set to be small, and dust such as spatter 16 and grinding stone powder (and iron powder) 17 and the like can be set. Intrusion into the tank from the tank opening 2 can be more effectively suppressed.

また、非連続円形孔４のスリット幅Ｇを、 0.1〜 0.3mmに設定することによって、溶接作業や塗装前研磨作業を行う間に於て、タンク開口部２周りの部品の溶接によるスパッタ16等のごみや、表面を研磨する際に発生するサンダー18の砥石粉（や鉄粉）17等のごみが、タンク開口部２からタンク内に侵入するのをより効果的に抑制することができる。
また、微小ジョイント部５の幅Ｗを、 1.0〜 2.7mmに設定することによって、円形板６を引きちぎるのに必要な強度を適切なものとすることができる。これにより、微小ジョイント部５を引きちぎって円形板６を意図的に分離するまで、意図しない円形板６の分離を防止することができる。また、円形板６を意図的に分離する際には、円形板６を容易に分離させることができる。 In addition, by setting the slit width G of the non-continuous circular hole 4 to 0.1 to 0.3 mm, spatter 16 and the like by welding parts around the tank opening 2 during the welding operation and the pre-painting polishing operation. It is possible to more effectively suppress dust such as grinding stone powder (and iron powder) 17 of the sander 18 generated when the surface is polished from entering the tank through the tank opening 2.
Moreover, the intensity | strength required in order to tear off the circular board 6 can be made appropriate by setting the width W of the micro joint part 5 to 1.0-2.7 mm. Thereby, unintentional separation of the circular plate 6 can be prevented until the circular plate 6 is intentionally separated by tearing the minute joint portion 5. Further, when the circular plate 6 is intentionally separated, the circular plate 6 can be easily separated.

また、金属板１ａの板厚ｔを、 3.0〜10.0mmに設定することによって、金属板１ａの切断を容易に行なうことができ、非連続円形孔４を容易に形成することができる。また、微小ジョイント部５の強度を適切に設定することができるので、微小ジョイント部５を引きちぎって円形板６を意図的に分離するまで、意図しない円形板６の分離を防止することができる。また、円形板６を意図的に分離する際には、円形板６を容易に分離させることができる。
また、微小ジョイント部５を２箇所に形成し、隣り合う２個の微小ジョイント部５，５の成す中心角度をθとすると、 100°≦θ≦ 170°に設定することによって、微小ジョイント部５を引きちぎって円形板６を分離する際に、微小ジョイント部５が数多く存在する場合と比較して、より容易に円形板６を分離することができる。これにより微小ジョイント部５を分離する作業が煩雑にならないようにすることができる。 Further, by setting the thickness t of the metal plate 1a to 3.0 to 10.0 mm, the metal plate 1a can be easily cut and the discontinuous circular hole 4 can be easily formed. Moreover, since the strength of the micro joint portion 5 can be set appropriately, unintentional separation of the circular plate 6 can be prevented until the micro joint portion 5 is torn off and the circular plate 6 is intentionally separated. Further, when the circular plate 6 is intentionally separated, the circular plate 6 can be easily separated.
Further, if the micro joint portion 5 is formed at two locations and the center angle formed by the two adjacent micro joint portions 5 and 5 is θ, the micro joint portion 5 is set to 100 ° ≦ θ ≦ 170 °. When the circular plate 6 is separated by tearing off the circular plate 6, the circular plate 6 can be separated more easily than in the case where there are many micro joint portions 5. Thereby, the operation | work which isolate | separates the micro joint part 5 can be made not to become complicated.

本発明の実施の一形態に係るタンクの製造方法にて製造されるタンクの斜視図である。It is a perspective view of the tank manufactured with the manufacturing method of the tank concerning one embodiment of the present invention. タンクの製造部品である金属板を示す平面図である。It is a top view which shows the metal plate which is a manufacturing component of a tank. タンクの製造部品である金属板を示す平面図である。It is a top view which shows the metal plate which is a manufacturing component of a tank. レーザービームによる金属板の切断作業を示す説明図であって、（Ａ）は要部拡大断面側面説明図、（Ｂ）は平面説明図である。It is explanatory drawing which shows the cutting | disconnection operation | work of the metal plate by a laser beam, Comprising: (A) is a principal part expanded sectional side surface explanatory drawing, (B) is a plane explanatory drawing. 要部拡大平面図である。It is a principal part enlarged plan view. 組立作業を示す説明用斜視図である。It is a perspective view for explanation which shows assembly work. 溶接作業を示す説明図であって、（Ａ）は斜視説明図、（Ｂ）は要部拡大断面側面説明図である。It is explanatory drawing which shows welding operation, Comprising: (A) is a perspective explanatory drawing, (B) is a principal part expanded sectional side explanatory drawing. 研磨作業を示す説明図であって、（Ａ）は斜視説明図、（Ｂ）は要部拡大断面側面説明図である。It is explanatory drawing which shows grinding | polishing operation | work, Comprising: (A) is a perspective explanatory drawing, (B) is a principal part expanded sectional side view explanatory drawing. 円形板分離作業を示す説明図であって、（Ａ）は斜視説明図、（Ｂ）は要部拡大断面側面説明図である。It is explanatory drawing which shows a circular plate isolation | separation operation | work, Comprising: (A) is a perspective explanatory drawing, (B) is a principal part expanded sectional side explanatory drawing.

符号の説明Explanation of symbols

１ａ，１ｂ 金属板
２ タンク開口部
４ 非連続円形孔
５ 微小ジョイント部
６ 円形板
Ｃ タンク半製品
Ｇ スリット幅
Ｗ 幅
ｔ 板厚 1a, 1b Metal plate 2 Tank opening 4 Non-continuous circular hole 5 Minute joint 6 Circular plate C Tank semi-finished product G Slit width W Width t Plate thickness

Claims (5)

少なくとも一枚の金属板（１ａ）に、レーザービーム（40）によって２箇所以上の微小ジョイント部（５）が残るように非連続円形孔（４）を切断形成し、該金属板（１ａ）及び別の金属板（１ｂ）の組立作業と溶接作業と塗装前研磨作業とを行なってタンク半製品（Ｃ）を製作し、その後、上記微小ジョイント部（５）を引きちぎるように上記非連続円形孔（４）内側の円形板（６）を分離してタンク開口部（２）を形成することを特徴とするタンクの製造方法。   A non-continuous circular hole (4) is cut and formed on at least one metal plate (1a) by a laser beam (40) so that two or more minute joint portions (5) remain, and the metal plate (1a) and A semi-finished tank product (C) is manufactured by assembling, welding, and pre-painting polishing of another metal plate (1b), and then the discontinuous circular holes so as to tear off the micro joint portion (5). (4) A method for manufacturing a tank, wherein the inner circular plate (6) is separated to form a tank opening (2). 上記非連続円形孔（４）のスリット幅（Ｇ）は、 0.1〜 0.3mmに設定されている請求項１記載のタンクの製造方法。   The method for manufacturing a tank according to claim 1, wherein the slit width (G) of the non-continuous circular hole (4) is set to 0.1 to 0.3 mm. 上記微小ジョイント部（５）の幅（Ｗ）は、 1.0〜 2.7mmに設定されている請求項１又は２記載のタンクの製造方法。   The method for manufacturing a tank according to claim 1 or 2, wherein a width (W) of the micro joint portion (5) is set to 1.0 to 2.7 mm. 上記金属板（１ａ）の板厚（ｔ）は、 3.0〜10.0mmである請求項１、２又は３記載のタンクの製造方法。   The method for manufacturing a tank according to claim 1, 2, or 3, wherein the metal plate (1a) has a thickness (t) of 3.0 to 10.0 mm. 上記微小ジョイント部（５）は、２箇所に形成され、隣り合う２個の該微小ジョイント部（５)(５）の成す中心角度をθとすると、 100°≦θ≦ 170°に設定されている請求項１、２、３又は４記載のタンクの製造方法。
The micro joint part (5) is formed at two places, and the central angle formed by two adjacent micro joint parts (5) and (5) is θ, and is set to 100 ° ≦ θ ≦ 170 °. The method for producing a tank according to claim 1, 2, 3 or 4.
JP2004352294A 2004-12-06 2004-12-06 Tank manufacturing method Active JP3892868B2 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011152431A1 (en) * 2010-05-31 2011-12-08 株式会社小松製作所 Hydraulic oil tank, hydraulic oil tank manufacturing method, and construction vehicle equipped with hydraulic oil tank
WO2012003268A2 (en) * 2010-07-02 2012-01-05 Kurt J. Lesker Company Methods for manufacturing a vacuum chamber and components thereof, and improved vacuum chambers and components thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011152431A1 (en) * 2010-05-31 2011-12-08 株式会社小松製作所 Hydraulic oil tank, hydraulic oil tank manufacturing method, and construction vehicle equipped with hydraulic oil tank
JP5211264B2 (en) * 2010-05-31 2013-06-12 株式会社小松製作所 Hydraulic oil tank, hydraulic oil tank manufacturing method, and construction vehicle including hydraulic oil tank
US8549852B2 (en) 2010-05-31 2013-10-08 Komatsu Ltd. Hydraulic oil tank, hydraulic oil tank manufacturing method and construction vehicle equipped with hydraulic oil tank
WO2012003268A2 (en) * 2010-07-02 2012-01-05 Kurt J. Lesker Company Methods for manufacturing a vacuum chamber and components thereof, and improved vacuum chambers and components thereof
WO2012003268A3 (en) * 2010-07-02 2012-04-05 Kurt J. Lesker Company Methods for manufacturing a vacuum chamber and components thereof, and improved vacuum chambers and components thereof

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