JPWO2008111120A1 - Method for manufacturing ring-shaped member - Google Patents

Method for manufacturing ring-shaped member Download PDF

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Publication number
JPWO2008111120A1
JPWO2008111120A1 JP2009503752A JP2009503752A JPWO2008111120A1 JP WO2008111120 A1 JPWO2008111120 A1 JP WO2008111120A1 JP 2009503752 A JP2009503752 A JP 2009503752A JP 2009503752 A JP2009503752 A JP 2009503752A JP WO2008111120 A1 JPWO2008111120 A1 JP WO2008111120A1
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ring
shaped member
pipe material
flange portion
manufacturing
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JP5427601B2 (en
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金光　俊明
俊明 金光
中山　勝彦
勝彦 中山
直樹 藤井
直樹 藤井
一幸 小田
一幸 小田
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Kanemitsu Corp
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Kanemitsu Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/16—Making other particular articles rings, e.g. barrel hoops
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D41/00—Application of procedures in order to alter the diameter of tube ends
    • B21D41/02—Enlarging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/76—Making machine elements elements not mentioned in one of the preceding groups
    • B21K1/761—Making machine elements elements not mentioned in one of the preceding groups rings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K21/00—Making hollow articles not covered by a single preceding sub-group
    • B21K21/12—Shaping end portions of hollow articles

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Forging (AREA)
  • Wire Processing (AREA)
  • Punching Or Piercing (AREA)

Abstract

素材ロスを無くし、加工コストの低減を図れるうえ、パイプ材から少ない工程数で簡単にリング状部材を得ることもできるリング状部材の製造方法を提供する。金属製のパイプ材１からリング状部材１０を得るリング状部材の製造方法において、パイプ材１の端部にフランジ部１ｃを張り出し成形する工程と、該フランジ部１ｃをパイプ材１から切り離してリング状部材１０を得る工程とを含む。Provided is a method for manufacturing a ring-shaped member that can eliminate material loss, reduce processing costs, and can easily obtain a ring-shaped member from a pipe material with a small number of steps. In the method of manufacturing a ring-shaped member for obtaining a ring-shaped member 10 from a metal pipe material 1, a step of projecting and forming a flange portion 1c at an end of the pipe material 1, and a ring by separating the flange portion 1c from the pipe material 1 Obtaining the shaped member 10.

Description

本発明は、金属製のパイプ材からリング状部材を得るリング状部材の製造方法に関する。  The present invention relates to a method for manufacturing a ring-shaped member that obtains a ring-shaped member from a metal pipe material.

従来、例えば、図２に示すようなリング状部材１０は、図３（ａ），（ｂ）に示す所定の板厚を有する素材２０から、プレス装置によって複数個のリング状部材１０を単列または複数列で打ち抜く方法によって製造されていた。  Conventionally, for example, a ring-shaped member 10 as shown in FIG. 2 is a single row of a plurality of ring-shaped members 10 from a material 20 having a predetermined plate thickness shown in FIGS. Or it was manufactured by the method of punching in multiple rows.

ところが、上記従来の製造方法では、素材２０の重量に対するリング状部材１０の重量の割合である歩留り率が悪く、リング状部材１０のコストを高くしていた。その理由は、リング状部材１０に対するスケルトンＳ１およびスラッグＳ２の割合が高い材料取りとなるためである。なお、上記「スケルトン」とは、複数個のリング状部材１０の打ち抜きによって残る枠状のスクラップのことであり、また、上記「スラッグ」とは、複数個のリング状部材１０の打ち抜き時に、ポンチで打ち抜き除去される複数のスクラップのことである。  However, in the conventional manufacturing method described above, the yield rate, which is the ratio of the weight of the ring-shaped member 10 to the weight of the material 20, is poor, and the cost of the ring-shaped member 10 is increased. The reason for this is that the ratio of the skeleton S1 and the slug S2 to the ring-shaped member 10 is high. The “skeleton” is frame-like scrap left by punching a plurality of ring-shaped members 10, and the “slag” is a punch when punching a plurality of ring-shaped members 10. It is a plurality of scraps that are punched and removed at the same time.

そこで、図４に示すようなリング状部材の製造方法が提案されている（例えば、特許文献１参照。）。このリング状部材の製造方法は、長方形状の鋼板２１の中央に長手方向にスリット２２を形成する工程と、前記スリット２２を押し広げて多角形部材２３を得る工程と、前記多角形部材２３の角部２３ａ及び辺部２３ｂを周方向になめらかな円弧状に成形してリング状部材１０を得る工程とからなる。  Therefore, a method for manufacturing a ring-shaped member as shown in FIG. 4 has been proposed (see, for example, Patent Document 1). The manufacturing method of this ring-shaped member includes a step of forming a slit 22 in the longitudinal direction in the center of a rectangular steel plate 21, a step of expanding the slit 22 to obtain a polygonal member 23, And forming the ring-shaped member 10 by forming the corner portion 23a and the side portion 23b into a smooth arc shape in the circumferential direction.

このようなリング状部材の製造方法によれば、長方形状の鋼板２１のスリット２２を押し広げて成形するので、図３のようなスケルトンＳ１やスラッグＳ２が発生することはなく、素材ロスを減少でき、リング状部材１０の加工コストを低減することができるというものである。  According to such a method for manufacturing a ring-shaped member, since the slit 22 of the rectangular steel plate 21 is pushed and formed, the skeleton S1 and the slug S2 as shown in FIG. 3 are not generated, and the material loss is reduced. The processing cost of the ring-shaped member 10 can be reduced.

特開２００４−１８８５４８号公報JP 2004-188548 A

しかしながら、上記特許文献１に記載のリング状部材の製造方法では、素材たる鋼板材からリング状部材を得るには、まず、鋼板材を長方形状に切断して長方形状の鋼板２１を得る工程が必要であり、しかる後、この長方形状の鋼板２１の中央にスリット２２をガス、プラズマ又はレーザにより形成する工程、更に、雌雄型及び成形型からなる装置でスリット２２を押し広げて多角形部材２３を得る工程、更に又、多角形部材２３の角部２３ａ及び辺部２３ｂを成形型により周方向になめらかな円弧状に成形する工程等、数多くの工程を要し、また各工程の複雑化を招くのであった。  However, in the method of manufacturing a ring-shaped member described in Patent Document 1, in order to obtain a ring-shaped member from a steel plate material, a process of first obtaining a rectangular steel plate 21 by cutting the steel plate material into a rectangular shape. After that, the step of forming the slit 22 in the center of the rectangular steel plate 21 by gas, plasma or laser, and further, the slit 22 is expanded by a device comprising a male and female mold and a molding die to form a polygonal member 23. In addition, many steps such as a step of forming the corners 23a and the side portions 23b of the polygonal member 23 into a circular arc that is smooth in the circumferential direction by a molding die are required, and each step is complicated. I was invited.

本発明は、このような問題を解決するものであって、その目的とするところは、素材ロスを無くし、加工コストの低減を図れるうえ、パイプ材から少ない工程数で簡単に連続的にリング状部材を得ることもできるリング状部材の製造方法を提供することにある。  The present invention solves such problems, and its object is to eliminate material loss, reduce processing costs, and easily and continuously form a ring from pipe material with a small number of processes. It is providing the manufacturing method of the ring-shaped member which can also obtain a member.

本発明は、請求項１に記載のように、金属製のパイプ材からリング状部材を得るリング状部材の製造方法において、前記パイプ材の端部にフランジ部を外向きに張り出し成形する工程と、前記フランジ部をパイプ材から切り離してリング状部材を得る工程とを含むことに特徴を有するものである。
このような構成によれば、パイプ材の端部にフランジ部を張り出し成形し、該フランジ部をパイプ材から切り離してリング状部材を得るので、図３のようなスケルトンＳ１やスラッグＳ２が発生することはなく、素材ロスを無くし、リング状部材の加工コストを低減できる。
また、パイプ材の端部にフランジ部を張り出し成形する工程と、前記フランジ部をパイプ材から切り離す工程の数少ない工程でパイプ材からリング状部材を簡単に連続的に得ることができる。The present invention provides a ring-shaped member manufacturing method for obtaining a ring-shaped member from a metal pipe material as defined in claim 1, and a step of projecting a flange portion outwardly from an end portion of the pipe material; And a step of separating the flange portion from the pipe material to obtain a ring-shaped member.
According to such a configuration, since the flange portion is formed by projecting at the end portion of the pipe material and the flange portion is separated from the pipe material to obtain the ring-shaped member, the skeleton S1 and the slug S2 as shown in FIG. 3 are generated. This eliminates material loss and reduces the processing cost of the ring-shaped member.
In addition, the ring-shaped member can be easily and continuously obtained from the pipe material by a few steps including the step of overhanging the flange portion at the end portion of the pipe material and the step of separating the flange portion from the pipe material.

本発明は、請求項２に記載のように、金属製のパイプ材からリング状部材を得るリング状部材の製造方法において、前記パイプ材の端部を朝顔形に押し拡げてフレア部を成形する工程と、前記フレア部を折り曲げ加工して外向きに張り出すフランジ部を成形する工程と、前記フランジ部をパイプ材から切り離してリング状部材を得る工程とを含むことに特徴を有するものである。
このような構成によれば、請求項１記載の発明の場合と同様に、図３のようなスケルトンＳ１やスラッグＳ２が発生することはなく、素材ロスを無くし、リング状部材の加工コストを低減でき、またパイプ材からリング状部材を簡単に連続的に得ることができる。しかも、パイプ材の端部にフランジ部を成形するに先立って、フレア部を成形する工程を経るので、パイプ材の板厚が厚い場合も、パイプ材の端部に直角なフランジ部をにわかに成形するに比較して、局部的に肉が薄くなるのを避けながらフランジ部をできる限り均一な肉厚に成形することができる。According to a second aspect of the present invention, in the method for manufacturing a ring-shaped member that obtains a ring-shaped member from a metal pipe material, the end of the pipe material is expanded in a morning glory shape to form a flare portion. And a step of bending the flare portion to form a flange portion projecting outward, and a step of separating the flange portion from the pipe material to obtain a ring-shaped member. .
According to such a configuration, as in the case of the invention described in claim 1, the skeleton S1 and the slug S2 as shown in FIG. 3 are not generated, the material loss is eliminated, and the processing cost of the ring-shaped member is reduced. In addition, the ring-shaped member can be easily and continuously obtained from the pipe material. Moreover, since the flare part is formed before the flange part is formed at the end of the pipe material, the flange part perpendicular to the end of the pipe material is formed even when the pipe material is thick. On the other hand, the flange portion can be formed to have a uniform thickness as much as possible while avoiding a thin thickness locally.

本発明によれば、パイプ材から素材ロスを無くし、しかも少ない工程数で簡単にリング状部材を連続的に得ることができ、リング状部材の加工コストを低減できる利点がある。  According to the present invention, there is an advantage that a material loss can be eliminated from the pipe material, and the ring-shaped member can be easily obtained continuously with a small number of steps, and the processing cost of the ring-shaped member can be reduced.

本発明の一実施例を示すリング状部材の製造方法の工程断面図である。It is process sectional drawing of the manufacturing method of the ring-shaped member which shows one Example of this invention. リング状部材の一例を示す平面図である。It is a top view which shows an example of a ring-shaped member. 従来の素材からブランクを打ち抜く工程を示す平面図であり、（ａ）は単列打ち抜きを示し、（ｂ）は並列打ち抜きを示している。It is a top view which shows the process of punching a blank from the conventional raw material, (a) shows single row punching, (b) has shown parallel punching. 特許文献１に記載のリング状部材の製造方法の工程図である。6 is a process diagram of a method for manufacturing a ring-shaped member described in Patent Document 1. FIG.

符号の説明Explanation of symbols

１ パイプ材
１ａ 端部
１ｂ フレア部
１ｃ フランジ部
１０ リング状部材1 Pipe material 1a End 1b Flare 1c Flange 10 Ring-shaped member

以下、本発明に係るリング状部材の製造方法の好適な実施形態を図面に基づいて説明する。  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a preferred embodiment of a method for producing a ring-shaped member according to the invention will be described with reference to the drawings.

図１は本発明の一実施例を示すリング状部材の製造方法の工程断面図である。
まず、図１（ａ）のように、軟鋼、銅、アルミニウム、鉄、ステンレス等金属製の断面円形のパイプ材１をプレス加工装置２にセットする。プレス加工装置２は、パイプ材１を把持するダイス３と、パイプ材１の端部を朝顔形に押し拡げる第１ポンチ４を備えている。ダイス３は、パイプ材１が挿通保持されるダイス穴３１ａを有しパイプ材１の外周面を支持する固定ダイス３１と、パイプ材１の内部に挿通され該パイプ材１の内周面を支持する可動ダイス３２とを組み合わせてなり、固定ダイス３１と可動ダイス３２間でパイプ材１を把持する。第１ポンチ４は、先端部に截頭円錐形突部４ａを備え、この截頭円錐形突部４ａの外周面でパイプ材１の端部を朝顔形に押し拡げる。FIG. 1 is a process sectional view of a method for manufacturing a ring-shaped member according to an embodiment of the present invention.
First, as shown in FIG. 1A, a pipe material 1 having a circular cross section made of a metal such as mild steel, copper, aluminum, iron, and stainless steel is set in a press working device 2. The press working apparatus 2 includes a die 3 that holds the pipe material 1 and a first punch 4 that spreads an end of the pipe material 1 in a morning glory shape. The die 3 has a die hole 31a through which the pipe material 1 is inserted and held, and supports the outer peripheral surface of the pipe material 1. The die 3 is inserted into the pipe material 1 and supports the inner peripheral surface of the pipe material 1. The pipe member 1 is gripped between the fixed die 31 and the movable die 32. The first punch 4 is provided with a frustoconical protrusion 4a at the tip, and the end of the pipe material 1 is expanded in a morning glory shape on the outer peripheral surface of the frustoconical protrusion 4a.

いま、図１（ａ）のように、パイプ材１の端部１ａが所定量だけ突出するようにパイプ材１を固定ダイス３１と可動ダイス３２間で把持する。次いで、同図（ｂ）のように、第１ポンチ４を矢印Ａ方向に前進させて截頭円錐形突部４ａでパイプ材１の端部１ａを朝顔形に押し拡げてフレア部１ｂを成形する（フレア加工工程）。  Now, as shown in FIG. 1A, the pipe material 1 is held between the fixed die 31 and the movable die 32 so that the end portion 1a of the pipe material 1 protrudes by a predetermined amount. Next, as shown in FIG. 4B, the first punch 4 is advanced in the direction of arrow A, and the end 1a of the pipe material 1 is pushed and expanded in the morning glory shape with the frustoconical protrusion 4a to form the flare 1b. (Flaring process).

次いで、同図（ｃ）のように、平らな押圧凹部５ａを有する第２ポンチ５を矢印Ａ方向に前進させることにより該押圧凹部５ａをフレア部１ｂに押圧させて該フレア部１ｂをパイプ材１の軸心に対し略直角になるまで折り曲げ加工して外向きに張り出すフランジ部１ｃを成形する（フランジ部成形工程）。  Next, as shown in FIG. 3C, the second punch 5 having a flat pressing recess 5a is advanced in the direction of arrow A to press the pressing recess 5a against the flare portion 1b, and the flare portion 1b is connected to the pipe material. A flange portion 1c is formed by bending until it is substantially perpendicular to the axis of 1 and projecting outward (flange portion forming step).

最後に、同図（ｄ）のように、第３ポンチ６及びフランジ部押え部材７を可動ダイス３２及び固定ダイス３１に向けて矢印Ａ方向に前進させると、フランジ部１ｃがフランジ押え部材７で押えられ、更に第３ポンチ６を矢印Ａ方向に前進させると、せん断力が働き、第３ポンチ６と固定ダイス３１の刃先がフランジ部１ｃの付け根部分に食い込み、せん断することによりフランジ部１ｃがパイプ材１から切り離されてパイプ材１の外径と略同一寸法の内径部１０ａを有するリング状部材１０（図２参照）を得ることができる（フランジ部切り離し工程）。  Finally, when the third punch 6 and the flange pressing member 7 are advanced in the direction of the arrow A toward the movable die 32 and the fixed die 31 as shown in FIG. When the third punch 6 is further pushed forward in the direction of the arrow A, a shearing force is applied, and the cutting edge of the third punch 6 and the fixing die 31 bites into the root portion of the flange portion 1c and shears, whereby the flange portion 1c is moved. A ring-shaped member 10 (see FIG. 2) having an inner diameter portion 10a that is cut off from the pipe material 1 and has approximately the same size as the outer diameter of the pipe material 1 can be obtained (flange portion cutting step).

なお、上記フランジ部成形工程において、フレア部１ｂを略直角にまで折り曲げる過程で第２ポンチ５の押圧凹部５ａの内周壁５ｂでフレア部１ｂの外周方向への材料流動を抑制する成形方法を採用した場合は、パイプ材１の板厚よりも増肉化する厚みのフランジ部１ｃを成形することができ、これによりパイプ材１の板厚よりも厚肉のリング状部材１０を得ることができる。  In the above flange portion forming step, a molding method is adopted that suppresses the material flow in the outer peripheral direction of the flare portion 1b at the inner peripheral wall 5b of the pressing recess 5a of the second punch 5 in the process of bending the flare portion 1b to a substantially right angle. In this case, the flange portion 1c having a thickness that is thicker than the plate thickness of the pipe material 1 can be formed, whereby the ring-shaped member 10 that is thicker than the plate thickness of the pipe material 1 can be obtained. .

上記フレア加工工程（図１（ｂ））、フランジ部成形工程（図１（ｃ））、およびフランジ部切り離し工程（図１（ｄ））を順次繰り返すことにより、連続してリング状部材１０を製造することができる。  By sequentially repeating the flare processing step (FIG. 1 (b)), the flange portion forming step (FIG. 1 (c)), and the flange portion cutting step (FIG. 1 (d)), the ring-shaped member 10 is continuously formed. Can be manufactured.

上記実施例による製造方法によれば、図３のようなスケルトンＳ１やスラッグＳ２を発生させることなく、素材ロス無く、１本のパイプ材１からプレス加工により多くのリング状部材１０を連続的に製造することができる。また、パイプ材１の端部にフランジ部１ｃを張り出し成形する工程と、該フランジ１ｃをパイプ材１から切り離す工程の数少ない工程でパイプ材１からリング状部材１０を簡単に得ることができる。したがって、リング状部材１０の加工コストを低減できる。  According to the manufacturing method according to the above-described embodiment, a large number of ring-shaped members 10 are continuously formed from one pipe member 1 by pressing without generating a skeleton S1 or slug S2 as shown in FIG. Can be manufactured. In addition, the ring-shaped member 10 can be easily obtained from the pipe material 1 by a few steps including the step of projecting and forming the flange portion 1 c at the end of the pipe material 1 and the step of separating the flange 1 c from the pipe material 1. Therefore, the processing cost of the ring-shaped member 10 can be reduced.

上記実施例では、パイプ材１の端部にフランジ部１ｃを成形するに先立って、フレア加工工程（図１（ｂ））を経てフレア部１ｂを成形しているが、必ずしも、フレア加工工程は必要とするものではなく、パイプ材１の端部に、フレア加工を経ることなく、フランジ部１ｃを外向きに張り出し成形することもできる。
パイプ材１の端部にフランジ部１ｃを外向きに張り出し成形するに際し、上記実施例のようなプレス加工装置２を採用することに限られず、その他のフランジ加工装置、例えば特開平１０−２１６８９３号公報等に記載されているように回転鍛造によりパイプ材１の端部にフランジ部１ｃを加工する装置や、あるいは特開平１０−１４６６２３号公報等に記載されているように円錐形ローラを用いてパイプ材１の端部を拡開状に折り曲げてフランジ部１ｃを成形する装置などを採用することもできる。In the above-described embodiment, the flare portion 1b is formed through the flare processing step (FIG. 1B) prior to forming the flange portion 1c at the end of the pipe material 1, but the flare processing step is not necessarily performed. It is not necessary, and the flange portion 1c can be extended outwardly at the end of the pipe material 1 without undergoing flaring.
When the flange portion 1c is extended outwardly from the end portion of the pipe material 1, the press working device 2 as in the above embodiment is not limited to being adopted, and other flange processing devices, for example, Japanese Patent Laid-Open No. 10-216893. Using a device for processing the flange portion 1c at the end of the pipe material 1 by rotational forging as described in the gazette or the like, or using a conical roller as described in JP-A-10-146623 An apparatus for forming the flange portion 1c by bending the end portion of the pipe material 1 into an expanded shape may be employed.

パイプ材１が断面円形である場合は、図２のような円環状のリング状部材１０を得ることができるが、パイプ材１は断面多角形であってもよく、この場合は多角形環状のリング状部材を得ることができる。  When the pipe member 1 has a circular cross section, an annular ring-shaped member 10 as shown in FIG. 2 can be obtained. However, the pipe member 1 may have a polygonal cross section. A ring-shaped member can be obtained.

Claims (2)

金属製のパイプ材からリング状部材を得るリング状部材の製造方法において、前記パイプ材の端部にフランジ部を外向きに張り出し成形する工程と、前記フランジ部をパイプ材から切り離してリング状部材を得る工程とを含むことを特徴とする、リング状部材の製造方法。  In the method of manufacturing a ring-shaped member that obtains a ring-shaped member from a metal pipe material, a step of projecting a flange portion outwardly from an end portion of the pipe material, and a ring-shaped member by separating the flange portion from the pipe material A process for obtaining a ring-shaped member. 金属製のパイプ材からリング状部材を得るリング状部材の製造方法において、前記パイプ材の端部を朝顔形に押し拡げてフレア部を成形する工程と、前記フレア部を折り曲げ加工して外向きに張り出すフランジ部を成形する工程と、前記フランジ部をパイプ材から切り離してリング状部材を得る工程とを含むことを特徴とする、リング状部材の製造方法。  In the manufacturing method of a ring-shaped member that obtains a ring-shaped member from a metal pipe material, a step of expanding the end of the pipe material into a morning glory shape and forming a flare portion, and bending the flare portion outward The manufacturing method of the ring-shaped member characterized by including the process of shape | molding the flange part which protrudes in a process, and the process of cut | disconnecting the said flange part from a pipe material, and obtaining a ring-shaped member.
JP2009503752A 2007-03-12 2007-03-12 Method for manufacturing ring-shaped member Expired - Fee Related JP5427601B2 (en)

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