JP4504519B2 - Bulge processing equipment - Google Patents

Bulge processing equipment Download PDF

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Publication number
JP4504519B2
JP4504519B2 JP2000187720A JP2000187720A JP4504519B2 JP 4504519 B2 JP4504519 B2 JP 4504519B2 JP 2000187720 A JP2000187720 A JP 2000187720A JP 2000187720 A JP2000187720 A JP 2000187720A JP 4504519 B2 JP4504519 B2 JP 4504519B2
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Japan
Prior art keywords
mold
hole
inner shaft
pipe material
cavity
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Expired - Fee Related
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JP2000187720A
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Japanese (ja)
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JP2002001446A (en
Inventor
道郎 伊藤
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Opton Co Ltd
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Opton Co Ltd
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Priority to JP2000187720A priority Critical patent/JP4504519B2/en
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Description

【0001】
【発明の属する技術分野】
本発明は、管材に軸方向圧縮力を付与しながら、管材内に高圧圧液を供給して管材をキャビティの形状に応じて加工するバルジ加工装置に関する。
【0002】
【従来の技術】
従来より、管材に軸方向圧縮力を付与しながら管材を加工、例えば蛇腹状に加工する装置として、特公昭46−9937号公報や特公昭46−9938号公報にあるものが知られている。この装置では、筒状本体内に複数に分割した可動駒型を移動可能に内装し、可動駒型に成形する形状に応じた成形面を形成している。そして、可動駒型内に管材を挿入して、供給される高圧圧液により管材の両端側の可動駒型を介して軸方向圧縮力を付与すると共に、管材内に高圧圧液を供給して、成形面に応じて管材を膨出成形していた。
【0003】
【発明が解決しようとする課題】
しかしながら、こうした従来のものでは、膨出時に座屈を防止することができるが、複数の可動駒型を用意しなければならず、金型の部品点数が多く、装置が複雑になるという問題があった。
【0004】
本発明の課題は、座屈を防止できると共に、金型の形成が容易なバルジ加工装置を提供することにある。
【0005】
【課題を解決するための手段】
かかる課題を達成すべく、本発明は課題を解決するため次の手段を取った。即ち、
金型により形成されるキャビティ内に管材を挿入し、アクチュエータにより押込み型を駆動して前記管材に軸方向圧縮力を付与しながら、前記管材内に高圧圧液を供給して前記管材を前記キャビティの形状に応じて加工するバルジ加工装置において、
前記管材の外周に摺動可能に嵌着される挿入孔が形成されると共に、挿入孔に連通して前記押込み型が挿入可能な加圧孔が形成された移動部材を備え、前記金型に前記キャビティに連通した大径孔を形成して、該大径孔に前記移動部材を摺動可能に挿入し、かつ、前記加圧孔に前記押込み型を摺動可能に挿入し、また、前記押込み型を貫通する内軸を前記管材内に挿入し、前記加圧孔に高圧圧液を供給して前記管材の外周を加圧することを特徴とするバルジ加工装置がそれである。
【0006】
更に、前記管材内に移動可能に挿入された内軸と、該内軸を移動させるアクチュエータとを備え、前記内軸を移動しながら前記管材を加工するように構成してもよい。また、前記キャビティは、蛇腹成形用であってもよい。
【0007】
【発明の実施の形態】
以下本発明の実施の形態を図面に基づいて詳細に説明する。
図1に示すように、1は金型で、上金型1aと下金型1bとからなる(図3(イ)参照)。上金型1aは上下方向に移動できるように構成されており下金型1bはベース2に固定されている。上金型1aと下金型1bとが合わせられたときに形成されるキャビティ4は、本実施形態では、管材6を径方向に膨出させて蛇腹を形成できる蛇腹成形用である。
【0008】
金型1の一方の側には、キャビティ4に挿入される管材6と同軸上に、左押込み型8が移動可能に支持されており、左押込み型8はアクチュエータとしてのシリンダ10のロッド12に接続されて、管材6の軸方向に移動されるように構成されている。左押込み型8の先端は、管材6内に挿入されると共に、管材6の端面が当接する段部8aが形成されている。左押込み型8には、一端が管材6内で開口し、他端が径方向に開口した高圧流路14が形成されている。高圧流路14は、図示しない高圧圧力源に接続されている。
【0009】
また、金型1の他方の側にも、キャビティ4に挿入される管材6と同軸上に、右押込み型16が配置されている。右押込み型16は、管材6と同軸上に配置されたロッド18を備え、ロッド18には、その軸方向に貫通孔20が形成されている。貫通孔20には内軸22が摺動可能に挿入されている。ロッド18は、シリンダ23のシリンダロッドを兼用しており、アクチュエータとしてのシリンダ23により軸方向に駆動されるように構成されている。
【0010】
ロッド18の先端には、キャップ部材24が固定されている。キャップ部材24の先端には、管材6が挿入される挿入孔26が形成されており、挿入孔26に連通して収納孔28が形成されている。収納孔28にはカラー部材30と筒部材32とが収納されている。カラー部材30の端面は、管材6の端面に当接するように形成されている。内軸22は、筒部材32、カラー部材30、キャップ部材24を貫通して、外部に突出されている。また、内軸22は、ベース2に取り付けられたアクチュエータとしてのシリンダ33のロッドに接続されている。
【0011】
一方、右押込み型16と同軸上に移動部材34が配置されており、移動部材34はベース2に取り付けられた支持部材36に形成された摺動孔38に摺動可能に挿入されている。移動部材34には管材6が摺動可能に挿入される挿入孔40が形成されている。
【0012】
また、挿入孔40に連通して加圧孔42が形成されている。加圧孔42には、キャップ部材24が摺動可能に挿入されると共に、加圧孔42内の気密が保たれるように、キャップ部材24の先端には、Oリング44が装着されている。移動部材34には、加圧孔42と連通すると共に、移動部材34の径方向に開口した供給流路46が形成されており、供給流路46には図示しない高圧圧力源が接続されている。
【0013】
更に、上金型1aと下金型1bとには、キャビティ4に連通した大径孔48が形成されており、大径孔48には移動部材34が挿入できるように構成されている。キャビティ4は蛇腹成形に必要な長さに形成し、大径孔48は、上金型1aと下金型1bとにできるだけ深く形成するのが好ましい。
【0014】
次に、前述した本実施形態のバルジ加工装置の作動について説明する。
まず、図3(イ)に示すように、上金型1aを上昇させて、上金型1aと下金型1bとを離間する。そして、下金型1bに管材6を装着する。管材6を装着する際には、内軸22の先端が管材6と干渉しないように、シリンダ33を駆動して内軸22を予め後退させる。また、シリンダ23を駆動してロッド18を後退させ、移動部材34を大径孔48から退避させる。これにより、キャビティ4に管材6を装着する際に、管材6が他の部材と干渉することなく、容易に装着することができる。
【0015】
次に、図3(ロ)に示すように、上金型1aと下金型1bとを合わせて、キャビティ4を形成する。また、シリンダ10を駆動して左押込み型8を前進させて、管材6の端面に段部8aを当接させる。更に、シリンダ33を駆動して、内軸22を管材6内に先端が左押込み型8の近傍に達するまで挿入する。
【0016】
シリンダ23を駆動して、右押込み型16を軸方向に移動して、カラー部材30を管材6の端面に当接させる。次に、図1に示すように、高圧圧力源から供給流路46に高圧圧液を供給する。これにより、供給流路46を介して加圧孔42内に高圧圧液が供給され、移動部材34がキャップ部材24の外周に沿って軸方向に移動される。移動部材34の先端が大径孔48の底に当接すると、加圧孔42内の圧力が上昇し、加圧孔42内の管材6の外周が高圧圧液により加圧される。
【0017】
一方、高圧圧力源から高圧流路14を介して、管材6内に高圧圧液が供給されると共に、シリンダ10、23を駆動して、左右押込み型8,16を介して管材6に軸方向圧縮力を付与する。そして、シリンダ33を駆動して内軸22を後退させる。
【0018】
内軸22の後退に従って、図4に示すように、図中左側から右側に順番に、管材6がキャビティ4の形状に従って径方向に膨出成形される。管材6には軸方向圧縮力が付与され、成形が進むに従って、右押込み型16がシリンダ23により駆動されて軸方向に移動する。また、加圧孔42内の管材6は高圧圧液により加圧されているので、座屈することなく、軸方向に押し込まれる。
【0019】
以上本発明はこの様な実施形態に何等限定されるものではなく、本発明の要旨を逸脱しない範囲において種々なる態様で実施し得る。
【0020】
【発明の効果】
以上詳述したように本発明のバルジ加工装置は、通常形成する金型であっても、加圧孔内の管材は高圧圧液により加圧されているので、軸方向圧縮力を付与しても座屈することがないという効果を奏する。
【図面の簡単な説明】
【図1】本発明の一実施形態としてのバルジ加工装置の概略構成図である。
【図2】本実施形態の金型、左右押込み型の拡大断面図である。
【図3】本実施形態のバルジ加工装置による加工順を示す説明図である。
【図4】本実施形態のキャビティ内の拡大図である。
【符号の説明】
1…金型 1a…上金型
1b…下金型 2…ベース
4…キャビティ 6…管材
8…左押込み型 14…高圧流路
16…右押込み型 22…内軸
24…キャップ部材 26…挿入孔
28…収納孔 30…カラー部材
32…筒部材 34…移動部材
36…支持部材 38…摺動孔
40…挿入孔 42…加圧孔
46…供給流路
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bulge processing apparatus that supplies a high-pressure pressurized liquid into a pipe material and processes the pipe material according to the shape of a cavity while applying an axial compressive force to the pipe material.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as apparatuses for processing a pipe material while applying an axial compressive force to the pipe material, for example, a bellows-like device, those disclosed in Japanese Patent Publication Nos. 46-9937 and 46-9938 are known. In this apparatus, a movable piece mold divided into a plurality of parts is movably installed in a cylindrical main body, and a molding surface corresponding to the shape to be molded into the movable piece mold is formed. Then, a tube material is inserted into the movable piece mold, and an axial compression force is applied through the movable piece molds on both ends of the tube material by the supplied high pressure liquid, and the high pressure liquid is supplied into the tube material. The pipe material was bulged and formed according to the molding surface.
[0003]
[Problems to be solved by the invention]
However, with such conventional devices, buckling can be prevented at the time of swelling, but a plurality of movable piece molds must be prepared, the number of mold parts is large, and the apparatus becomes complicated. there were.
[0004]
The subject of this invention is providing the bulge processing apparatus which can prevent buckling and can form a metal mold | die easily.
[0005]
[Means for Solving the Problems]
In order to achieve this problem, the present invention has taken the following measures in order to solve the problem. That is,
A tube material is inserted into a cavity formed by a mold, and an indentation die is driven by an actuator to apply an axial compressive force to the tube material. In the bulge processing device that processes according to the shape of
The insertion hole is slidably fitted on the outer periphery of the tube material is formed, in communication with the insertion hole with the moving member, wherein the push-fit pressurized pressure hole can be inserted is formed in the mold Forming a large-diameter hole communicating with the cavity, slidably inserting the moving member into the large-diameter hole, and slidably inserting the push mold into the pressure hole; the inner shaft extending through the push-fit inserted into the tube member, bulging apparatus is then characterized by pressurizing the outer circumference of the tube material by supplying high pressure liquid to the pressurized pressure hole.
[0006]
Furthermore, an inner shaft that is movably inserted into the tube material and an actuator that moves the inner shaft may be provided, and the tube material may be processed while moving the inner shaft. The cavity may be for bellows molding.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
As shown in FIG. 1, 1 is a metal mold | die which consists of the upper metal mold | die 1a and the lower metal mold | die 1b (refer FIG. 3 (A)). The upper mold 1 a is configured to be movable in the vertical direction, and the lower mold 1 b is fixed to the base 2. In the present embodiment, the cavity 4 formed when the upper mold 1a and the lower mold 1b are combined is used for bellows molding in which a bellows can be formed by expanding the pipe material 6 in the radial direction.
[0008]
On one side of the mold 1, a left pushing mold 8 is movably supported on the same axis as the pipe material 6 inserted into the cavity 4, and the left pushing mold 8 is attached to a rod 12 of a cylinder 10 as an actuator. It is configured to be connected and moved in the axial direction of the pipe material 6. The front end of the left pushing mold 8 is inserted into the tube material 6 and a step portion 8 a with which the end surface of the tube material 6 abuts is formed. The left pushing mold 8 is formed with a high-pressure channel 14 having one end opened in the tube 6 and the other end opened in the radial direction. The high pressure channel 14 is connected to a high pressure source (not shown).
[0009]
A right push mold 16 is also arranged on the other side of the mold 1 coaxially with the tube material 6 inserted into the cavity 4. The right pushing die 16 includes a rod 18 that is arranged coaxially with the pipe material 6, and a through hole 20 is formed in the rod 18 in the axial direction thereof. An inner shaft 22 is slidably inserted into the through hole 20. The rod 18 also serves as the cylinder rod of the cylinder 23 and is configured to be driven in the axial direction by the cylinder 23 as an actuator.
[0010]
A cap member 24 is fixed to the tip of the rod 18. An insertion hole 26 into which the tube material 6 is inserted is formed at the tip of the cap member 24, and a storage hole 28 is formed in communication with the insertion hole 26. A collar member 30 and a cylindrical member 32 are stored in the storage hole 28. The end face of the collar member 30 is formed so as to contact the end face of the tube material 6. The inner shaft 22 penetrates the cylindrical member 32, the collar member 30, and the cap member 24, and protrudes to the outside. The inner shaft 22 is connected to a rod of a cylinder 33 as an actuator attached to the base 2.
[0011]
On the other hand, a moving member 34 is disposed coaxially with the right push-in mold 16, and the moving member 34 is slidably inserted into a slide hole 38 formed in a support member 36 attached to the base 2. The moving member 34 is formed with an insertion hole 40 into which the tube material 6 is slidably inserted.
[0012]
Further, a pressure hole 42 is formed in communication with the insertion hole 40. The cap member 24 is slidably inserted into the pressure hole 42, and an O-ring 44 is attached to the tip of the cap member 24 so that the inside of the pressure hole 42 is kept airtight. . The moving member 34 is connected to the pressurizing hole 42 and is formed with a supply channel 46 that is opened in the radial direction of the moving member 34, and a high pressure source (not shown) is connected to the supply channel 46. .
[0013]
Furthermore, a large diameter hole 48 communicating with the cavity 4 is formed in the upper mold 1a and the lower mold 1b, and the moving member 34 can be inserted into the large diameter hole 48. The cavity 4 is preferably formed to a length necessary for bellows molding, and the large-diameter hole 48 is preferably formed as deep as possible in the upper mold 1a and the lower mold 1b.
[0014]
Next, the operation of the bulge processing apparatus of the present embodiment described above will be described.
First, as shown in FIG. 3 (a), the upper mold 1a is raised to separate the upper mold 1a and the lower mold 1b. Then, the pipe material 6 is mounted on the lower mold 1b. When the tube material 6 is mounted, the cylinder 33 is driven to retract the inner shaft 22 in advance so that the tip of the inner shaft 22 does not interfere with the tube material 6. Further, the cylinder 23 is driven to retract the rod 18, and the moving member 34 is retracted from the large diameter hole 48. Thereby, when mounting the pipe material 6 in the cavity 4, the pipe material 6 can be easily mounted without interfering with other members.
[0015]
Next, as shown in FIG. 3B, the cavity 4 is formed by combining the upper mold 1a and the lower mold 1b. Further, the cylinder 10 is driven to advance the left pushing die 8 so that the step portion 8 a is brought into contact with the end surface of the tube material 6. Furthermore, the cylinder 33 is driven, and the inner shaft 22 is inserted into the pipe material 6 until the tip reaches the vicinity of the left push mold 8.
[0016]
The cylinder 23 is driven to move the right pushing die 16 in the axial direction so that the collar member 30 is brought into contact with the end face of the tube material 6. Next, as shown in FIG. 1, the high-pressure liquid is supplied from the high-pressure source to the supply channel 46. As a result, the high-pressure liquid is supplied into the pressure hole 42 via the supply flow path 46, and the moving member 34 is moved in the axial direction along the outer periphery of the cap member 24. When the tip of the moving member 34 comes into contact with the bottom of the large-diameter hole 48, the pressure in the pressurizing hole 42 rises, and the outer periphery of the tube 6 in the pressurizing hole 42 is pressurized by the high-pressure liquid.
[0017]
On the other hand, a high-pressure liquid is supplied from the high-pressure source through the high-pressure flow path 14 into the pipe member 6, and the cylinders 10 and 23 are driven to move axially toward the pipe member 6 through the left and right pushing molds 8 and 16. Apply compressive force. Then, the cylinder 33 is driven to retract the inner shaft 22.
[0018]
As the inner shaft 22 retreats, as shown in FIG. 4, the tube material 6 is bulged and formed in the radial direction according to the shape of the cavity 4 in order from the left side to the right side in the drawing. An axial compressive force is applied to the tube material 6, and as the molding progresses, the right pushing die 16 is driven by the cylinder 23 and moves in the axial direction. Moreover, since the pipe material 6 in the pressurizing hole 42 is pressurized by the high pressure liquid, it is pushed in the axial direction without buckling.
[0019]
The present invention is not limited to such embodiments as described above, and can be implemented in various modes without departing from the gist of the present invention.
[0020]
【The invention's effect】
As described above in detail, the bulge processing apparatus of the present invention applies axial compressive force because the pipe material in the pressurizing hole is pressurized by the high pressure liquid even in the mold that is normally formed. Also has the effect of not buckling.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a bulge processing apparatus as an embodiment of the present invention.
FIG. 2 is an enlarged cross-sectional view of a mold and a left and right push mold according to the present embodiment.
FIG. 3 is an explanatory diagram showing a processing order by the bulge processing apparatus of the present embodiment.
FIG. 4 is an enlarged view inside the cavity of the present embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Metal mold 1a ... Upper metal mold 1b ... Lower metal mold 2 ... Base 4 ... Cavity 6 ... Pipe material 8 ... Left pushing type 14 ... High pressure flow path 16 ... Right pushing type 22 ... Inner shaft 24 ... Cap member 26 ... Insertion hole 28 ... Accommodating hole 30 ... Collar member 32 ... Cylindrical member 34 ... Moving member 36 ... Supporting member 38 ... Sliding hole 40 ... Insertion hole 42 ... Pressurizing hole 46 ... Supply flow path

Claims (3)

金型により形成されるキャビティ内に管材を挿入し、アクチュエータにより押込み型を駆動して前記管材に軸方向圧縮力を付与しながら、前記管材内に高圧圧液を供給して前記管材を前記キャビティの形状に応じて加工するバルジ加工装置において、
前記管材の外周に摺動可能に嵌着される挿入孔が形成されると共に、挿入孔に連通して前記押込み型が挿入可能な加圧孔が形成された移動部材を備え、前記金型に前記キャビティに連通した大径孔を形成して、該大径孔に前記移動部材を摺動可能に挿入し、かつ、前記加圧孔に前記押込み型を摺動可能に挿入し、また、前記押込み型を貫通する内軸を前記管材内に挿入し、前記加圧孔に高圧圧液を供給して前記管材の外周を加圧することを特徴とするバルジ加工装置。
A tube material is inserted into a cavity formed by a mold, and an indentation die is driven by an actuator to apply an axial compressive force to the tube material. In the bulge processing device that processes according to the shape of
The insertion hole is slidably fitted on the outer periphery of the tube material is formed, in communication with the insertion hole with the moving member, wherein the push-fit pressurized pressure hole can be inserted is formed in the mold Forming a large-diameter hole communicating with the cavity, slidably inserting the moving member into the large-diameter hole, and slidably inserting the push mold into the pressure hole; A bulge processing apparatus , wherein an inner shaft penetrating a pushing mold is inserted into the pipe material, and a high-pressure liquid is supplied to the pressurizing hole to pressurize the outer periphery of the pipe material.
前記管材内に移動可能に挿入された内軸と、該内軸を移動させるアクチュエータとを備え、前記内軸を移動しながら前記管材を加工することを特徴とする請求項1記載のバルジ加工装置。  The bulge processing apparatus according to claim 1, further comprising an inner shaft movably inserted into the pipe material and an actuator for moving the inner shaft, and processing the pipe material while moving the inner shaft. . 前記キャビティは、蛇腹成形用であることを特徴とする請求項1又は請求項2記載のバルジ加工装置。  The bulge processing apparatus according to claim 1, wherein the cavity is for bellows molding.
JP2000187720A 2000-06-22 2000-06-22 Bulge processing equipment Expired - Fee Related JP4504519B2 (en)

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JP2007260762A (en) * 2006-03-30 2007-10-11 Nisshin Steel Co Ltd Hydroforming device, and forming method using the device
JP4796942B2 (en) * 2006-11-17 2011-10-19 株式会社浅野 Hydroforming apparatus, hydroforming method, and hydroformed product
JP4981717B2 (en) * 2008-03-12 2012-07-25 本田技研工業株式会社 Bulge forming method and bulge forming apparatus

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JPS5138905Y1 (en) * 1974-07-26 1976-09-24
JPS5335669A (en) * 1976-09-16 1978-04-03 Honda Motor Co Ltd Liquid pressure bulge device
JPS56154228A (en) * 1980-04-28 1981-11-28 Yamamoto Suiatsu Kogyosho:Kk Hydraulic bulging method
JPH10175028A (en) * 1996-12-18 1998-06-30 Nippon Steel Corp Highly accurate forming method of metallic tube by hydro-forming method

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JPS4948828B1 (en) * 1969-03-10 1974-12-24

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Publication number Priority date Publication date Assignee Title
JPS5138905Y1 (en) * 1974-07-26 1976-09-24
JPS5335669A (en) * 1976-09-16 1978-04-03 Honda Motor Co Ltd Liquid pressure bulge device
JPS56154228A (en) * 1980-04-28 1981-11-28 Yamamoto Suiatsu Kogyosho:Kk Hydraulic bulging method
JPH10175028A (en) * 1996-12-18 1998-06-30 Nippon Steel Corp Highly accurate forming method of metallic tube by hydro-forming method

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