JP3965124B2 - Manufacturing method of cylindrical metal case - Google Patents

Manufacturing method of cylindrical metal case Download PDF

Info

Publication number
JP3965124B2
JP3965124B2 JP2003045983A JP2003045983A JP3965124B2 JP 3965124 B2 JP3965124 B2 JP 3965124B2 JP 2003045983 A JP2003045983 A JP 2003045983A JP 2003045983 A JP2003045983 A JP 2003045983A JP 3965124 B2 JP3965124 B2 JP 3965124B2
Authority
JP
Japan
Prior art keywords
cylindrical body
cylindrical
outer diameter
side edge
inner diameter
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.)
Expired - Fee Related
Application number
JP2003045983A
Other languages
Japanese (ja)
Other versions
JP2004255385A (en
Inventor
利一 藤堂
Original Assignee
藤堂工業株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 藤堂工業株式会社 filed Critical 藤堂工業株式会社
Priority to JP2003045983A priority Critical patent/JP3965124B2/en
Publication of JP2004255385A publication Critical patent/JP2004255385A/en
Application granted granted Critical
Publication of JP3965124B2 publication Critical patent/JP3965124B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Description

【０００１】
【発明の属する技術分野】
この発明は、金属板を塑性加工して筒状のケースを形成する筒状金属ケースの製造方法に関する。
【０００２】
【従来の技術】
【特許文献１】
特開２０００−１４１０２号公報
【特許文献２】
特開２００２−１９９６４７号公報
従来、モータやバルブ等の胴体外装部は、筒状の金属製ケースにより構成されていた。この筒状金属製ケースは、特許文献１に開示されているように、予め筒状に形成された金属材料に、さらに切削加工や塑性加工を施して所望の形状に形成していた。また、特許文献２に開示されているように、平板状の金属板を打ち抜いて所定形状に加工し、更にこの金属板を丸めて円筒状に形成し筒状金属ケースを形成したものも提案されている。
【０００３】
【発明が解決しようとする課題】
前記従来の技術の前者の、予め円筒状の金属材料から切削加工や塑性加工により円筒状金属ケースを形成する場合、円筒内面等の加工が難しい上、加工工数が多く、円筒状の金属材料のコストが高いという問題があった。
【０００４】
また、前記従来の技術の後者の場合、金属平板から精度の高い円筒状のケースを塑性加工により作ることができず、円筒の真円度や合わせ目の強度が低いもので、高品質・高精度の製品には適用できないものであった。
【０００５】
この発明は、前記従来の技術の問題点に鑑みてなされたもので、金属板から塑性加工により簡単に高精度に製造することができる筒状金属ケースの製造方法を提供することを目的とする。
【０００６】
【課題を解決するための手段】
この発明は、金属板を所定形状に打ち抜いて側面板材を形性し、上記側面板材を湾曲させて筒状に形成するとともに、一対の互い対向する端面部に形成された凹凸部を係合して連結し筒状体を形成し、上記筒状体を、上記筒状体の側面の規定外径と等しい内径の雌型に圧入するとともに、上記筒状体の側面の規定内径と等しい外径の雄型を上記筒状体内に圧入し、上記筒状体を上記規定内外径に塑性変形させて精密仕上げを行う筒状金属ケースの製造方法である。
【０００７】
上記金属板は、帯状の金属板であり、長手方向側縁部に沿って両側縁部の僅か内側をプレスして薄肉部を形成した後、上記両側縁部を残すとともにその側縁部に一部で連結した状態で上記金属板を所定形状に打ち抜き上記側面板材を形成するものである。上記側面板材を形成した後、上記両側縁部に連結された上記側面板材の上記薄肉部の一部を打ち抜いて上記筒状体の開口端縁部の形状を形成し、その後上記側面板材を湾曲させて上記筒状体を形成する。
【０００８】
そして、上記接続部とともに上記筒状体の両端開口部周縁を所定形状に打ち抜いて、上記接続部及び両側縁部と上記筒状体を分離する。この後上記筒状体を、上記筒状体の側面の規定外径と等しい内径であって、上記側面板材を湾曲させて上記筒状体を形成した状態の外径よりも僅かに小さい内径の雌型に圧入するとともに、上記筒状体の側面の規定内径と等しい外径であって、上記側面板材を湾曲させて上記筒状体を形成した状態の内径よりも僅かに大きい外径の雄型を上記筒状体内に圧入して、上記筒状体を上記規定内外径に塑性変形させて精密仕上げを行う。
【０００９】
【発明の実施の形態】
以下この発明の一実施形態について図面に基づいて説明する。この実施形態の筒状金属ケース１０は、図１に示すように円筒状に形成されたもので、ソレノイドバルブの胴体ケースやモータの胴体ケースに用いられるものである。この筒状金属ケース１０は、金属板を筒状に形成したもので、金属板の一対の互い対向する端面部に形成された凹部１２と凸部１４を互いに合わせて連結し、筒状体１６を形成して成る。筒状体１６の凹部１２と凸部１４は、つぶれた略Ω字状に形成され、互いに密に嵌合している。
【００１０】
この実施形態の筒状金属ケース１０の製造方法は、図２に示すように、先ず工程ａにおいて、帯状の金属板２０を所定間隔で、図面上ハッチングで示す形状のパンチにより、中心孔２２及びその両側縁孔２４を打ち抜く。次に工程ｂで、金属板２０の両側縁部２０ａに沿って、その僅かに内側に薄肉部２６をプレス成形する。薄肉部２６は、前工程の側縁孔２６間に亘って両側縁部２０ａに沿って各々形成する。これにより、金属板２０の側縁部２０ａは、両側に広がる。そして、工程ｃで図２のハッチングで示す形状のパンチにより、中心孔２２の前後所定幅で薄肉部２６の側縁部２０ａ側の一部及び側縁部２０ａから薄肉部２６を横断するように、金属板２０を打ち抜いて側縁打抜き部２８を両側に形成する。
【００１１】
次に、図３に示すように、工程ｃの次の工程ｄで、帯状の金属板２０の側縁部２０ａの外側部分を長方形のパンチ２９で打抜き、金属板２０の長手方向に保持枠２０ｂを残して切除する。さらに、中心孔２２を含む範囲で、金属板２０の幅方向に側縁打抜き部２８に連通するとともに、金属板２０により形成されるこの筒状金属ケース１０の連結端部３０の凹部１２と凸部１４を形成するように、金属板２０を打ち抜く。これにより、金属板２０を所定形状に打ち抜いて形成した筒状金属ケース１０の側面板材３２が形成される。この側面板材３２は、金属板２０の隣り合う側縁打抜き部２８間の接続部３４により保持枠２０ｂに連結され、脱落することがない。この状態で保持枠２０ｂ間の側面板材３２が、帯状に連なって次の工程に送られる。
【００１２】
そして、図４に示すように、工程ｅにおいて、保持枠２０ｂ間の側面板材３２を、接続部３４を中心としてＵ字状に湾曲させる。さらに、工程ｆにおいて、保持枠２０ｂ間のＵ字状の側面板材３２の凹部１２が形成された連結端部３０を円弧状に湾曲させる。続いて工程ｇで、保持枠２０ｂ間の側面板材３２の凸部１４が形成された連結端部３０を、円弧状に湾曲させ、凹部１２と凸部１４とを嵌合させ筒状体１６を形成する。
【００１３】
この後、工程ｈにおいて、保持枠２０ｂの先端部をパンチ４０によりカットする。同時に、工程ｉで、パンチ４２，４３により接続部３４とともに筒状体１６の両端開口部周縁を所定形状に打ち抜く。パンチ４２，４３は、筒状体１６の円内に先端部を挿入して、挿入方向の直角方向にプレスして打ち抜くように形成されている。
【００１４】
次に、筒状体１６を真円度修正を行なう工程に移る。この工程では、図５，図６に示すように、プレス装置４４により、筒状体１６の真円度を修正する。プレス装置４４は、筒状体１６を設置する載置部４６と、この載置部４６の下方に位置し、側面板材３２を湾曲させた記筒状体１６の成形直後に外径よりも僅かに小さい内径を有する雌型４８を備えている。また雌型４８の下方には、雌型４８内に挿入され突没自在に設けられ筒状体１６を受ける受け部材４９が挿入されている。受け部材４９の上端部外周に、筒状体１６の薄肉部２６が嵌合可能に形成されている。
【００１５】
雌型４８の上方には、雌型４８内に挿入可能であるとともに、筒状体１６を形成した状態の内径よりも僅かに大きい外径の雄型５０が位置している。雄型５０が可動型であり、プレス装置４４の可動部材５２に固定されている。雄型５０の先端部にはテーパ部５０ａが形成され、筒状体１６内に容易に挿入されるように設けられている。雄型５０の上方の所定位置筒状体１６の薄肉部２６に嵌合するため僅かに径が大きく形成された段差部５０ｂが設けられている。また、雄型５０の外周には雌型４８への挿入方向に摺動自在のスリーブ５４が設けられている。スリーブ５４は、雄型５０に対して上下方向に摺動可能に設けられ、図示しないバネにより上方に付勢されているとともに、図示しない支持部材により保持されている。
【００１６】
プレス装置４４の動作は、筒状体１６を載置部４６に載せ、まず、可動部材５２の降下とともに、筒状体１６の規定内径と等しい外径の雄型５０が筒状体１６内に挿入し、この後、筒状体１６の規定外径と等しい内径の雌型４８内に筒状体１６が圧入される。これにより、側面板材３２を折り曲げただけの筒状体１６を、この雌型４８と雄型５０により、規定の内外径に塑性変形させて、寸法製精度を上げる精密仕上げを行う。このとき、スリーブ５４は、筒状体１６の端縁に当接して、雄部材５０に対して上方に移動する。また、筒状体１６の下端部は受け部材４９の上端部に支持されるとともに、薄肉部２６の段差部にも受け部材４９の外側面が当接して支持する。
【００１７】
この精密仕上げにより、筒状体１６が挿入される雌型４８の内径が、側面板材３２を湾曲させて筒状体１６を形成した直後の外径よりも僅かに小さいので、筒状体１６は雌型４８内に押圧挿入されることにより塑性変形され、凹部１２と凸部１４との係合部分が互いに押圧しあい、緊密に嵌合しカシメ状態になる。さらに、筒状体１６を形成した直後の内径よりも僅かに大きい外径の雄型５０が挿入された状態で、筒状体１６が雌型４８に押圧挿入されるので、筒状体１６の内径は雄型５０に規制され、筒状体１６は雌型４８と雄型５０の内外径に精密に塑性変形される。また、このとき、載置部４６に載置された筒状体１６の下端部は受け部材４９により支持され、受け部材４９の上端部が、筒状体１６の薄肉部２６に対応した形状に形成されているので、筒状体１６の薄肉部２６が不規則に変形することがない。また、筒状体１６の上端部は、雄型５０の段差部５０ｂにより薄肉部２６の端部が支持され、不規則に変形することがない。
【００１８】
そして、雌型４８と雄型５０によるプレスが終了すると、雄型５０が上昇するとともにスリーブ５４が雄型５０の先端部に戻る。これにより筒状体１６は、スリーブ５４に押されて雄型５０から押し出され、所定位置に排出される。
【００１９】
この実施形態の筒状金属ケース１０は、帯状の金属板２０を打抜きや塑性加工により成形し、連続的に筒状体を形成し、寸法精度の高い状態に仕上げることができ、安価に高品質の筒状金属ケース１０を製造することができる。また、薄肉部２６の形成に際して、側縁部２０ａのわずかに内側で薄肉部２６を形成するので、肉が側縁に逃げ、容易且つ正確に薄肉にプレスすることができる。また、薄肉部２６の一部を打ち抜いて筒状体１６の開口端縁部の形状を形成した後、側面板材３２を湾曲させて筒状体１６を形成するので、筒状体１６の開口端縁の切削加工等の後加工が不要となり、加工工数及びコストを削減することができる。
【００２０】
なお、この発明の筒状金属ケースは、上記実施形態に限定されるものではなく、筒状体の形状は適宜選択可能なものである。
【００２１】
【発明の効果】
この発明の筒状金属ケースの製造方法によれば、金属板を塑性加工により簡単に効率的に筒状体を形成することができ、容易に寸法精度の高い状態に仕上げることができる。また、コストも安価で、高品質の筒状金属ケースを製造することができる。
【図面の簡単な説明】
【図１】 この発明の一実施形態の筒状金属ケースの真円度修正工程を示す斜視図である。
【図２】 この発明の一実施形態の筒状金属ケースの加工工程を示す平面図である。
【図３】 この実施形態の筒状金属ケースの次の加工工程を示す平面図である。
【図４】 この実施形態の筒状金属ケースのさらに次の加工工程を示す平面図である。
【図５】 この実施形態の筒状金属ケースの真円度修正工程のプレス装置の概略縦断面図である。
【図６】 この実施形態の筒状金属ケースの真円度修正工程により、プレス装置でプレスした状態の概略縦断面図である。
【符号の説明】
１０ 筒状金属ケース
１２ 凹部
１４ 凸部
１６ 筒状体
２０ 金属板
３０ 連結端部
３２ 側面板材
３４ 接続部
４８ 雌型
４９ 受け部材
５０ 雄型[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a cylindrical metal case in which a metal plate is plastically processed to form a cylindrical case.
[0002]
[Prior art]
[Patent Document 1]
JP 2000-14102 A [Patent Document 2]
JP, 2002-199667, A Conventionally, body exterior parts, such as a motor and a valve, were constituted by cylindrical metal cases. As disclosed in Patent Document 1, this cylindrical metal case has been formed into a desired shape by further performing cutting or plastic working on a metal material previously formed into a cylindrical shape. In addition, as disclosed in Patent Document 2, a plate-shaped metal plate is punched and processed into a predetermined shape, and the metal plate is rounded and formed into a cylindrical shape to form a cylindrical metal case. ing.
[0003]
[Problems to be solved by the invention]
When forming the cylindrical metal case from the cylindrical metal material in advance by cutting or plastic processing, the processing of the cylindrical inner surface is difficult, and the number of processing steps is large. There was a problem of high cost.
[0004]
In the latter case of the conventional technique, a cylindrical case with high accuracy cannot be made from a metal flat plate by plastic working, and the roundness of the cylinder and the strength of the seam are low. It was not applicable to precision products.
[0005]
The present invention has been made in view of the above-described problems of the prior art, and an object thereof is to provide a method for manufacturing a cylindrical metal case that can be easily manufactured from a metal plate by plastic working with high accuracy. .
[0006]
[Means for Solving the Problems]
According to the present invention, a side plate is formed by punching a metal plate into a predetermined shape, and the side plate is curved and formed into a cylindrical shape, and the concave and convex portions formed on a pair of opposing end surface portions are engaged. To form a cylindrical body, and press-fit the cylindrical body into a female mold having an inner diameter equal to the prescribed outer diameter of the side surface of the cylindrical body, and an outer diameter equal to the prescribed inner diameter of the side surface of the cylindrical body. The cylindrical metal case is press-fitted into the cylindrical body, and the cylindrical body is plastically deformed to the prescribed inner and outer diameters for precision finishing.
[0007]
The metal plate is a band-shaped metal plate, and after forming a thin portion by pressing the inner side of both side edges along the side edge in the longitudinal direction, the both side edges are left and the side edges are aligned. The side plates are formed by punching the metal plate into a predetermined shape in a state where the side plates are connected to each other. After forming the side plate material, a part of the thin portion of the side plate material connected to the side edge portions is punched to form the shape of the opening edge of the cylindrical body, and then the side plate material is bent. To form the cylindrical body.
[0008]
And the both-ends opening edge periphery of the said cylindrical body is punched in a predetermined shape with the said connection part, and the said connection part, both-sides edge part, and the said cylindrical body are isolate | separated. Thereafter, the cylindrical body has an inner diameter that is equal to the prescribed outer diameter of the side surface of the cylindrical body, and has an inner diameter that is slightly smaller than the outer diameter of the cylindrical body formed by curving the side plate material. A male that has an outer diameter that is press-fitted into a female mold and that has an outer diameter equal to the prescribed inner diameter of the side surface of the cylindrical body and is slightly larger than the inner diameter in a state where the cylindrical body is formed by bending the side plate. A mold is press-fitted into the cylindrical body, and the cylindrical body is plastically deformed to the specified inner and outer diameters for precision finishing .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. A cylindrical metal case 10 of this embodiment is formed in a cylindrical shape as shown in FIG. 1, and is used for a body case of a solenoid valve or a body case of a motor. This cylindrical metal case 10 is formed by forming a metal plate into a cylindrical shape, and connects a concave portion 12 and a convex portion 14 formed on a pair of opposed end surface portions of the metal plate to each other, thereby connecting a cylindrical body 16. Formed. The concave portion 12 and the convex portion 14 of the cylindrical body 16 are formed in a crushed substantially Ω-shape and are closely fitted to each other.
[0010]
As shown in FIG. 2, in the manufacturing method of the cylindrical metal case 10 of this embodiment, first, in step a, the belt-like metal plate 20 is punched at a predetermined interval by a punch having a shape shown by hatching in the drawing. The side edge holes 24 are punched out. Next, in step b, the thin-walled portion 26 is press-formed slightly inside along the both side edge portions 20a of the metal plate 20. The thin wall portions 26 are formed along the side edge portions 20a across the side edge holes 26 of the previous step. Thereby, the side edge part 20a of the metal plate 20 spreads on both sides. Then, in step c, a portion of the thin wall portion 26 on the side edge portion 20a side and the thin wall portion 26a are crossed from the side edge portion 20a with a predetermined width before and after the center hole 22 by a punch having a shape shown by hatching in FIG. The metal plate 20 is punched to form side edge punched portions 28 on both sides.
[0011]
Next, as shown in FIG. 3, in step d after step c, the outer portion of the side edge portion 20 a of the band-shaped metal plate 20 is punched with a rectangular punch 29, and the holding frame 20 b is formed in the longitudinal direction of the metal plate 20. Excise leaving behind. Further, in a range including the center hole 22, the metal plate 20 communicates with the side edge punched portion 28 in the width direction, and the concave portion 12 and the convex portion of the connecting end portion 30 of the cylindrical metal case 10 formed by the metal plate 20. The metal plate 20 is punched out so as to form the portion 14. Thereby, the side plate material 32 of the cylindrical metal case 10 formed by punching the metal plate 20 into a predetermined shape is formed. The side plate 32 is connected to the holding frame 20b by the connecting portion 34 between the adjacent side edge punched portions 28 of the metal plate 20, and does not fall off. In this state, the side plate 32 between the holding frames 20b is sent to the next step in a strip shape.
[0012]
Then, as shown in FIG. 4, in step e, the side plate 32 between the holding frames 20 b is bent in a U shape with the connecting portion 34 as the center. Furthermore, in the process f, the connection end part 30 in which the recessed part 12 of the U-shaped side plate 32 between the holding frames 20b is formed is curved in an arc shape. Subsequently, in step g, the connecting end portion 30 where the convex portion 14 of the side plate 32 between the holding frames 20b is formed is curved in an arc shape, and the concave portion 12 and the convex portion 14 are fitted together so that the cylindrical body 16 is fitted. Form.
[0013]
Thereafter, in step h, the tip of the holding frame 20b is cut with the punch 40. At the same time, in step i, the punches 42 and 43 punch out the peripheral edges of the opening portions of the cylindrical body 16 together with the connecting portion 34 into a predetermined shape. The punches 42 and 43 are formed so as to be punched by inserting a tip portion into a circle of the cylindrical body 16 and pressing in a direction perpendicular to the insertion direction.
[0014]
Next, the process proceeds to the step of correcting the roundness of the cylindrical body 16. In this step, as shown in FIGS. 5 and 6, the roundness of the cylindrical body 16 is corrected by the press device 44. The pressing device 44 is located slightly below the outer diameter immediately after molding the mounting portion 46 for installing the cylindrical body 16 and the recording cylindrical body 16 that is positioned below the mounting portion 46 and has the side plate 32 curved. A female die 48 having a small inner diameter is provided. Also, below the female mold 48, a receiving member 49 that is inserted into the female mold 48 and is provided so as to protrude and retract and receives the cylindrical body 16 is inserted. A thin portion 26 of the tubular body 16 is formed on the outer periphery of the upper end portion of the receiving member 49 so as to be fitted.
[0015]
Above the female mold 48, there is located a male mold 50 that can be inserted into the female mold 48 and has an outer diameter slightly larger than the inner diameter in a state where the cylindrical body 16 is formed. The male mold 50 is a movable mold and is fixed to the movable member 52 of the press device 44. A tapered portion 50 a is formed at the distal end portion of the male mold 50 and is provided so as to be easily inserted into the cylindrical body 16. A stepped portion 50b having a slightly larger diameter is provided to fit into the thin portion 26 of the cylindrical body 16 at a predetermined position above the male mold 50. Further, a sleeve 54 slidable in the insertion direction into the female mold 48 is provided on the outer periphery of the male mold 50. The sleeve 54 is provided so as to be slidable in the vertical direction with respect to the male mold 50, is urged upward by a spring (not shown), and is held by a support member (not shown).
[0016]
The operation of the press device 44 is to place the cylindrical body 16 on the mounting portion 46, and first, with the lowering of the movable member 52, the male mold 50 having an outer diameter equal to the prescribed inner diameter of the cylindrical body 16 is placed in the cylindrical body 16. After that, the cylindrical body 16 is press-fitted into the female die 48 having an inner diameter equal to the prescribed outer diameter of the cylindrical body 16. As a result, the cylindrical body 16 in which the side plate member 32 is simply bent is plastically deformed to a prescribed inner and outer diameter by the female mold 48 and the male mold 50, and precision finishing is performed to increase the dimensional accuracy. At this time, the sleeve 54 contacts the edge of the cylindrical body 16 and moves upward with respect to the male member 50. Further, the lower end portion of the cylindrical body 16 is supported by the upper end portion of the receiving member 49, and the outer surface of the receiving member 49 is also in contact with and supported by the step portion of the thin portion 26.
[0017]
Due to this precision finishing, the inner diameter of the female die 48 into which the cylindrical body 16 is inserted is slightly smaller than the outer diameter immediately after the side plate member 32 is bent to form the cylindrical body 16. By being press-inserted into the female die 48, it is plastically deformed, and the engaging portions of the concave portion 12 and the convex portion 14 are pressed against each other, and are tightly fitted into a crimped state. Furthermore, since the cylindrical body 16 is pressed and inserted into the female mold 48 in a state where the male mold 50 having an outer diameter slightly larger than the inner diameter immediately after forming the cylindrical body 16 is inserted, The inner diameter is regulated by the male mold 50, and the cylindrical body 16 is precisely plastically deformed to the inner and outer diameters of the female mold 48 and the male mold 50. At this time, the lower end portion of the cylindrical body 16 placed on the placement portion 46 is supported by the receiving member 49, and the upper end portion of the receiving member 49 has a shape corresponding to the thin portion 26 of the cylindrical body 16. Since it is formed, the thin portion 26 of the cylindrical body 16 does not deform irregularly. Further, the upper end portion of the cylindrical body 16 is supported by the end portion of the thin portion 26 by the step portion 50b of the male mold 50, and does not deform irregularly.
[0018]
When the pressing by the female mold 48 and the male mold 50 is completed, the male mold 50 is raised and the sleeve 54 is returned to the tip of the male mold 50. Thereby, the cylindrical body 16 is pushed by the sleeve 54, pushed out of the male mold 50, and discharged to a predetermined position.
[0019]
The cylindrical metal case 10 of this embodiment can be formed by punching or plastic working the band-shaped metal plate 20 to continuously form a cylindrical body and finish it in a state with high dimensional accuracy. The cylindrical metal case 10 can be manufactured. Further, when forming the thin portion 26, the thin portion 26 is formed slightly inside the side edge portion 20a, so that the meat escapes to the side edge and can be easily and accurately pressed to the thin wall. Further, after forming a shape of the opening edge portion of the cylindrical body 16 by punching a part of the thin portion 26, the side plate 32 is curved to form the cylindrical body 16, so that the opening end of the cylindrical body 16 is formed. Post-processing such as edge cutting is not required, and processing man-hours and costs can be reduced.
[0020]
In addition, the cylindrical metal case of this invention is not limited to the said embodiment, The shape of a cylindrical body can be selected suitably.
[0021]
【The invention's effect】
According to the method for manufacturing a cylindrical metal case of the present invention, it is possible to easily and efficiently form a cylindrical body of a metal plate by plastic working, and it is possible to easily finish a state with high dimensional accuracy. In addition, a high-quality cylindrical metal case can be manufactured at a low cost.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a roundness correcting step of a cylindrical metal case according to an embodiment of the present invention.
FIG. 2 is a plan view showing a processing step of the cylindrical metal case according to the embodiment of the present invention.
FIG. 3 is a plan view showing a next processing step of the cylindrical metal case of this embodiment.
FIG. 4 is a plan view showing a further next processing step of the cylindrical metal case of this embodiment.
FIG. 5 is a schematic longitudinal sectional view of a pressing device in a roundness correcting step of the cylindrical metal case of this embodiment.
FIG. 6 is a schematic longitudinal sectional view showing a state in which the cylindrical metal case of this embodiment is pressed by a press device in a roundness correcting step.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Cylindrical metal case 12 Concave part 14 Convex part 16 Cylindrical body 20 Metal plate 30 Connection end part 32 Side face plate material 34 Connection part 48 Female type 49 Receiving member 50 Male type

Claims (1)

帯状の金属板を所定形状に打ち抜いて、長手方向側縁部に沿った両側縁部の僅かに内側をプレスして薄肉部を上記側縁部に沿って形成した後、上記両側縁部を残すとともに、その側縁部に接続部で一部が連結した状態に上記金属板を打ち抜き、上記両側縁部に連結された上記側面板材の上記薄肉部に上記筒状体の開口端縁部の形状を形成し、この後上記接続部を中心に上記側面板材を湾曲させて筒状に形成するとともに、一対の互い対向する端部に形成された凹凸部を係合して連結し筒状体を形成し、上記接続部とともに上記筒状体の両端開口部周縁を所定形状に打ち抜いて上記接続部及び両側縁部と上記筒状体を分離し、この後上記筒状体を、上記筒状体の側面の規定外径と等しい内径であって、上記側面板材を湾曲させて上記筒状体を形成した状態の外径よりも僅かに小さい内径の雌型に圧入するとともに、上記筒状体の側面の規定内径と等しい外径であって、上記側面板材を湾曲させて上記筒状体を形成した状態の内径よりも僅かに大きい外径の雄型を上記筒状体内に圧入して、上記筒状体を上記規定内外径に塑性変形させて精密仕上げを行うことを特徴とする筒状金属ケースの製造方法。 A strip-shaped metal plate is punched into a predetermined shape, and the inner side is pressed slightly on both side edges along the longitudinal side edge to form a thin part along the side edge, and then the both side edges are left. In addition, the shape of the opening edge of the cylindrical body is formed in the thin portion of the side plate connected to the both side edges by punching the metal plate in a state where a part of the side edge is connected to the side edge. After that, the side plate material is curved around the connecting portion to form a cylindrical shape, and the concave and convex portions formed at a pair of opposite end portions are engaged and connected to connect the cylindrical body. Forming and punching the peripheral edges of both ends of the cylindrical body into a predetermined shape together with the connecting portion to separate the connecting portion and both side edge portions from the cylindrical body; a prescribed outer diameter equal to the inner diameter side of, by bending the side plate forms the tubular body With press-fitted into the inner diameter slightly smaller female than the outer diameter of the states, a outer diameter equal to the specified inner diameter side of the cylindrical body, the formation of the tubular body by bending the side plate A cylindrical metal case characterized by press fitting a male mold having an outer diameter slightly larger than the inner diameter of the state into the cylindrical body, and plastically deforming the cylindrical body to the prescribed inner and outer diameters to perform precision finishing Manufacturing method.
JP2003045983A 2003-02-24 2003-02-24 Manufacturing method of cylindrical metal case Expired - Fee Related JP3965124B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003045983A JP3965124B2 (en) 2003-02-24 2003-02-24 Manufacturing method of cylindrical metal case

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003045983A JP3965124B2 (en) 2003-02-24 2003-02-24 Manufacturing method of cylindrical metal case

Publications (2)

Publication Number Publication Date
JP2004255385A JP2004255385A (en) 2004-09-16
JP3965124B2 true JP3965124B2 (en) 2007-08-29

Family

ID=33112651

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003045983A Expired - Fee Related JP3965124B2 (en) 2003-02-24 2003-02-24 Manufacturing method of cylindrical metal case

Country Status (1)

Country Link
JP (1) JP3965124B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101613474B1 (en) * 2014-09-30 2016-04-19 (주)화신 Pedal arm hemming apparatus
KR20210022361A (en) * 2019-08-20 2021-03-03 주식회사 신한테크놀로지 Manufacturing method of bushing, bushign manufactured by the same, and molding assembly inclulding the bushing

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100676846B1 (en) * 2005-12-29 2007-02-01 주식회사 엠에스 오토텍 Door impact beam and the method for making the same
JP5944182B2 (en) * 2012-02-29 2016-07-05 株式会社井口一世 Method for manufacturing hollow cylindrical ring member and hollow cylindrical ring member
JP6098188B2 (en) * 2013-01-30 2017-03-22 株式会社リコー Pipe body, pipe body manufacturing method
CN104324982A (en) * 2014-10-14 2015-02-04 无锡市金杨新型电源有限公司 Automatic shaping machine for battery cap
WO2019077742A1 (en) * 2017-10-20 2019-04-25 株式会社ヨロズ Hollow member manufacturing method and manufacturing device
JP7035695B2 (en) * 2018-03-26 2022-03-15 トヨタ自動車株式会社 Joining equipment and manufacturing method of joined body
CN108480484B (en) * 2018-05-16 2023-11-07 福州大学 Combined tower type thin-wall annular metal rubber part stamping die with inner reinforcing rib plates and working method thereof
CN113098215B (en) * 2021-05-21 2022-05-31 深圳市精泰盛金属制品有限公司 New energy automobile light alloy motor casing casting forming system
CN113458188B (en) * 2021-07-06 2022-12-09 绍兴润达通风设备有限公司 Axial fan dryer inner wall shaping device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101613474B1 (en) * 2014-09-30 2016-04-19 (주)화신 Pedal arm hemming apparatus
KR20210022361A (en) * 2019-08-20 2021-03-03 주식회사 신한테크놀로지 Manufacturing method of bushing, bushign manufactured by the same, and molding assembly inclulding the bushing
KR102249377B1 (en) * 2019-08-20 2021-05-07 주식회사 신한테크놀로지 Manufacturing method of bushing, bushign manufactured by the same, and molding assembly inclulding the bushing

Also Published As

Publication number Publication date
JP2004255385A (en) 2004-09-16

Similar Documents

Publication Publication Date Title
JP3965124B2 (en) Manufacturing method of cylindrical metal case
JP3952991B2 (en) Manufacturing method of piping having joint portions at both ends
KR100992801B1 (en) Bearing seal, a manufacturing device and method of the same
US9206843B2 (en) Method of producing bushing and piece with bushing
WO2017191688A1 (en) Fastener element, manufacturing device for fastener element, and manufacturing method for fastener element
JP4149027B2 (en) Square pipe manufacturing method
JP4472797B2 (en) Metal product pressing and progressive processing
JP3934491B2 (en) Rocker arm and manufacturing method thereof
US20060086171A1 (en) Apparatus and method for stamping and deburring clutch discs and resultant product
JP3739936B2 (en) Method of processing part having cylindrical body with expanded tip and mold used therefor
JP3331499B2 (en) Bush processing method
EP1660258A1 (en) A method and system for forming a cam-engaged rocker arm
JP2004061180A (en) Contact probes
JP3706865B2 (en) Pipe material groove forming method
JP2009183955A (en) Method and apparatus for forming workpiece
US20110139572A1 (en) Method For Manufacturing Steel Plate-Shaped Component, Pole Parking, And Cold Forging Die
JP2018061979A (en) Pipe manufacturing method and press device used therein
JP3689679B2 (en) Manufacturing method of cylindrical metal can
JP6768250B2 (en) Press-fit terminal manufacturing equipment and press-fit terminal manufacturing method
JPS6359799B2 (en)
KR101480440B1 (en) Making method of pan nut
CN113275461B (en) Automobile cross beam connecting piece and machining process thereof, drawing die and automobile
CN217941590U (en) Punching burr pressing inner buckle bending forming die
CN114733972B (en) Processing method and processing die for supporting plate of high-fitting handrail frame body of automobile
JP3590813B2 (en) Parts and molding method

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20041012

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20060829

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20061004

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20061204

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20070425

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20070525

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110601

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110601

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140601

Year of fee payment: 7

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

LAPS Cancellation because of no payment of annual fees