JP2004098123A

JP2004098123A - Rubber press molding method and rubber press molding die

Info

Publication number: JP2004098123A
Application number: JP2002262959A
Authority: JP
Inventors: Tatsuo Nakahata; 中畑　達雄
Original assignee: Fuji Heavy Industries Ltd
Current assignee: Subaru Corp
Priority date: 2002-09-09
Filing date: 2002-09-09
Publication date: 2004-04-02
Anticipated expiration: 2022-09-09
Also published as: JP4406528B2

Abstract

<P>PROBLEM TO BE SOLVED: To bend a workpiece by making it closely stuck to a rubber press molding die in one rubber press molding, to prevent work efficiency from lowering, and to suppress large increase in the production cost. <P>SOLUTION: In the rubber press molding, a workpiece 7 is arranged on a first molding die 1 so that the end of the workpiece 7 is positioned over a recess 12. Then, a second molding die 2 is placed on the workpiece 7 which is positioned over the recess 12. After that, the second molding die 2 is pressurized toward the first molding die 1 with a pressurizing rubber 82; as a result, the upper slope 23 of the second molding die 2 is fitted to the recess 12 while making the upper slope 23 sliding on the lower slope 13 of the first molding die 1; thus, the rubber press molding is performed on the workpiece 7. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、ゴムプレス成形方法及びゴムプレス成形型に関し、中でも平面状の板金部品を折り曲げ、底面とその辺にそれぞれ壁面部を形成するゴムプレス成形方法及びゴムプレス成形型に関する。
【０００２】
【従来の技術】
板金部品の成形をゴムプレス成形機で行う際には、例えば、図１０及び図１１に示すようなゴムプレス成形型１０１が用いられる。このゴムプレス成形型１０１は、上面がほぼ水平面に形成され、上面の一部には、被加工部材１０４を成形する際に用いる凹部１０２が形成されている。被加工部材１０４は、プレート１０３とピン１０５とでゴムプレス成形型１０１の水平面の部分に固着され、凹部１０２上に突出した被加工部材１０４は、図１２及び図１３に示すように、ゴムプレス成形機の押圧ゴム１００の押圧作用によって凹部１０２内へ押され、図１４に示すような形状に成形される。
ところが、図１３に示すように、凹部１０２で被加工部材１０４を折り曲げる際には、押圧ゴム１００が上方から下方に被加工部材１０４を押圧しており、横方向から被加工部材１０４を押圧する力は弱いので、ゴムプレス成形型１０１に密着させるように折り曲げることができなかった。
そこで、この問題を解決するために、一回のゴムプレス成形で完全に折り曲げることができなかった被加工部材をゴムプレス成形型に嵌合するブロックを介して二回目のゴムプレス成形を行う方法が開示されている（例えば、特許文献１参照。）。
【０００３】
【特許文献１】
特開２０００−１４０９５０号公報
【０００４】
【発明が解決しようとする課題】
しかしながら、上記の方法においては、ゴムプレス成形の工程が二回必要となるので、作業効率が低下し、生産コストの高騰を招くものとなっていた。
【０００５】
そこで、本発明の課題は、一回のゴムプレス成形で被加工部材をゴムプレス成形型に密着させて折り曲げることができ、作業効率の低下を防ぎ、生産コストの高騰を抑制するゴムプレス成形方法及びゴムプレス成形型を提供することである。
【０００６】
【課題を解決するための手段】
上記課題を解決するため、請求項１に記載の発明は、押圧ゴムによって平面状の板金の被加工部材を折り曲げ、底面とその交差する辺にそれぞれ立設される壁面部とを成形するゴムプレス成形方法であって、側壁に開口面積が上方に向かって広がるような下傾斜面を有する凹部を上面に備える第一成形型上に、前記被加工部材の端部が前記凹部の上方に位置するように前記被加工部材を配置し、次いで、前記凹部の上方に位置する前記被加工部材上に、前記下傾斜面と同じ傾斜角の上傾斜面を側壁に備えるとともに前記第一成形型に嵌合する第二成形型を載置し、次いで、前記押圧ゴムにより前記第二成形型を前記第一成形型に向けて押圧することにより、当該第二成形型の前記上傾斜面を前記第一成形型の前記下傾斜面に摺動させながら前記凹部に嵌合させて、前記被加工部材をゴムプレス成形することを特徴とする。
【０００７】
請求項１に記載の発明によれば、第一成形型上に、被加工部材の端部が凹部の上方に位置するように取り付け、次いで、第二成形型を、凹部の上方に位置する被加工部材上に載置し、次いで、押圧ゴムにより第二成形型を第一成形型に向けて押圧するので、第二成形型は凹部に向けて移動し、第二成形型の底部に位置する被加工部材が第二成形型の移動とともに変形する。そして、第二成形型を第一成形型に嵌合させて、被加工部材をゴムプレス成形するので、被加工部材の端部は凹部に沿って形成されることとなって、一回のゴムプレス成形で被加工部材をゴムプレス成形型に密着させて折り曲げることができ、作業効率の低下を防ぎ、生産コストの高騰を抑制することができる。
【０００８】
請求項２に記載の発明は、請求項１に記載のゴムプレス成形方法において、前記第一成形型は、前記凹部に互いに異なる向きに傾斜する複数の前記下傾斜面と、各下傾斜面に対向するとともに、前記第二成形型が前記凹部に嵌合する際に、前記第二成形型によって押圧される複数の押圧面と、を備え、前記第二成形型は、前記凹部に嵌合する際に、各下傾斜面を押圧する複数の前記上傾斜面を備え、前記押圧ゴムにより前記第二成形型を前記第一成形型に向けて押圧することにより、前記上傾斜面を前記下傾斜面に摺動させながら前記凹部に嵌合させて、前記被加工部材を複数の前記押圧面に向けて押圧して成形することを特徴とする。
【０００９】
請求項２に記載の発明によれば、第一成形型は、凹部に互いに異なる向きに傾斜する複数の下傾斜面と、各下傾斜面に対向するとともに、第二成形型が凹部に嵌合する際に、第二成形型によって押圧される複数の押圧面と、を備え、第二成形型は、凹部に嵌合する際に、各下傾斜面を押圧する複数の上傾斜面を備え、上傾斜面を下傾斜面に摺動させながら、第二成形型を第一成形型に嵌合させて、被加工部材をゴムプレス成形するので、被加工部材の変形に伴って、第二成形型は内側に向かって移動し、やがて上傾斜面が下傾斜面に摺動しながら凹部内に滑り落ちることとなって、第二成形型を凹部に嵌合させて、被加工部材を押圧面に向けて押圧して成形することができる。
よって、一回のゴムプレス成形で被加工部材を第一成形型に密着させて折り曲げることができることとなって、作業効率の低下を防ぎ、生産コストの高騰を抑制することができる。
【００１０】
請求項３に記載の発明は、請求項２に記載のゴムプレス成形方法に使用されるゴムプレス成形型であって、複数の前記下傾斜面と、各下傾斜面に対向するとともに、前記第二成形型が前記凹部に嵌合する際に、前記第二成形型によって押圧される複数の押圧面と、を有する第一成形型と、前記凹部に嵌合する際に、各下傾斜面を押圧する複数の前記上傾斜面が形成された第二成形型と、を備えることを特徴とする。
【００１１】
請求項３に記載の発明によれば、ゴムプレス成形型は、複数の下傾斜面と、各下傾斜面に対向するとともに、第二成形型が凹部に嵌合する際に、第二成形型によって押圧される複数の押圧面と、を有する第一成形型と、凹部に嵌合する際に、各下傾斜面を押圧する複数の上傾斜面が形成された第二成形型と、を備えるので、被加工部材の変形に伴って、第二成形型は内側に向かって移動し、やがて上傾斜面が下傾斜面に摺動しながら凹部内に滑り落ちることとなって、第二成形型を凹部に嵌合させて、被加工部材を押圧面に向けて押圧して成形することができる。
よって、一回のゴムプレス成形で被加工部材を第一成形型に密着させて折り曲げることができることとなって、作業効率の低下を防ぎ、生産コストの高騰を抑制することができる。
【００１２】
【発明の実施の形態】
以下、本発明に係る実施の形態のゴムプレス成形型及びゴムプレス成形方法について詳細に説明する。
最初にゴムプレス成形型１０について説明する。
図１〜図４に示すように、ゴムプレス成形型１０は、ゴムプレス機の底盤８１上に載置され、成形される被加工部材７を保持固定する第一成形型としてのゴムプレス成形凹型１、ゴムプレス機の押圧ゴム８２によって押圧され、被加工部材７をゴムプレス成形凹型１と挟み込んで成形する第二成形型としてのゴムプレス成形凸型２、ゴムプレス成形凹型１上に載置された被加工部材７の上面に載置されるプレート３等を備えている。
【００１３】
ゴムプレス成形凹型１は、平面視略矩形状の箱体であり、その上面には、ほぼ水平な平面部１１が形成されている。また、上面の一部には、隣接する二辺に沿った略Ｌ字形状の凹部１２が形成されている。また、凹部１２のうち、ゴムプレス成形凹型１の外周側の面と、略Ｌ字状の両端部の面とには、互いに異なる向きに傾斜し、開口面積が上方に向かうにつれて徐々に拡がるような複数（例えば二つ）の下傾斜面１３が形成されている。この下傾斜面１３は、ゴムプレス成形凹型１の上面に対して、例えば、６０度の傾斜を有するように形成されている。また、各下傾斜面１３に対向する側壁には、ゴムプレス成形凸型２が凹部１２に嵌合する際に、ゴムプレス成形凸型２によって押圧される複数（例えば二つ）の押圧面１４が形成されている。なお、下傾斜面１３のゴムプレス成形凹型１の上面に対する傾斜角は、４５〜６０度の範囲内であることが好ましい。
この凹部１２を覆うように被加工部材７が固定される。凹部１２の最上部の内縁部に折り曲げ部が位置し、外縁部よりやや内側（例えば、２〜３ｍｍ）に被加工部材７の端が位置するように固定される。
【００１４】
ゴムプレス成形凸型２は、ゴムプレス成形凹型１の凹部１２と同様の略Ｌ字形状とされ、凹部１２に嵌合した際に、その上面がゴムプレス成形凹型１の平面部１１とほぼ面一となるように形成されている。また、ゴムプレス成形凸型２を凹部１２に嵌合させた際に、凹部１２の下傾斜面１３に面する部分には、下傾斜面１３とほぼ同じ傾斜を有する上傾斜面２３が形成されている。
ゴムプレス成形凸型２の本実施の形態での大きさは、被加工部材７とともに最後まで凹部１２に押し込んだ場合に、それぞれの型の最上面が一致するようにされている。なお、本実施の形態におけるゴムプレス成形凸型２の寸法は、図１において横１４０ｍｍ、縦９５ｍｍ、幅４５ｍｍであり、高さは３０ｍｍである。
【００１５】
プレート３は、ゴムプレス成形凹型１の平面部１１上に載置された被加工部材７を上面から押さえ付けるものであり、平面視略矩形状に形成されている。プレート３には、ピン等（図示しない）を挿通するための孔部３１が形成されており、この孔部３１からピン等を挿通することにより、プレート３と被加工部材７とゴムプレス成形凹型１とが連結される。なお、孔部３１に挿通されるピンは、プレート３の上面から突出しないようにされており、ゴムプレスの障害とならないようになっている。
【００１６】
次に、ゴムプレス成形型１０を使用したゴムプレス成形方法について説明する。
まず、図３及び図４に示すように、ゴムプレス機の底盤８１上にゴムプレス成形凹型１を設置する。
次いで、ゴムプレス成形凹型１の平面部１１に、被加工部材７の折り曲げる部分が凹部１２の上方に位置するように被加工部材７を取り付けるとともに、被加工部材７の上面にプレート３を載せ、孔部３１からピン等を挿通して、ゴムプレス成形凹型１と被加工部材７とプレート３とを連結する。
次いで、ゴムプレス成形凸型２の一部が、凹部１２の上方に位置する被加工部材７上に位置するようにゴムプレス成形凸型２を載置する。すなわち、その最下面の幅の約一割（例えば、２〜３ｍｍ）をゴムプレス成形凹型１に重ねる。
次いで、図５〜図８に示すように、ゴムプレス機の押圧ゴム８２により、ゴムプレス成形凸型２を押圧し、ゴムプレス成形凸型２の上傾斜面２３をゴムプレス成形凹型１の下傾斜面１３に摺動させながら、ゴムプレス成形凸型２をゴムプレス成形凹型１に嵌合させて被加工部材７をゴムプレス成形する。このとき、ゴムプレス成形凸型２は、被加工部材７を介して凹部１２の押圧面１４を押圧した状態となっている。
次いで、凹部１２からゴムプレス成形凸型２を取り外すとともに、プレート３を取り外し、図９に示すように成形された被加工部材７をゴムプレス成形凹型１から取り出す。
【００１７】
本発明のゴムプレス成形型１０を使用したゴムプレス成形方法によれば、押圧ゴム８２によってゴムプレス成形凸型２を押圧していくと、ゴムプレス成形凸型２と接している被加工部材７が凹部１２内に向けて変形していく。この際、押圧ゴム８２もゴムプレス成形凸型２の外縁に合わせて変形し、上傾斜面２３に入り込んだ押圧ゴム８２がゴムプレス成形凸型２の外側への移動を規制する。そして、さらに押圧ゴム８２がゴムプレス成形凸型２を押圧していくと、押圧ゴム８２により、ゴムプレス成形凸型２は側方からの押圧力も受けることになる。ゴムプレス成形凸型２の下部での支持剛性及び押圧ゴム８２の変形は、外側に向かうほど大きくなるので、側方からの押圧力も外側に向かうほど大きくなり、さらに、被加工部材７の変形に伴って、ゴムプレス成形凸型２は内側に向かって移動する。やがて、ゴムプレス成形凸型２は、その上傾斜面２３が下傾斜面１３に摺動しながら凹部１２内に滑り落ち、凹部１２に完全に嵌合したときに、被加工部材７を介して押圧面１４を押圧するので、被加工部材７を平面部１１又は凹部１２に沿って成形することができる。
よって、一回のゴムプレス成形で被加工部材７をゴムプレス成形凹型１に密着させて折り曲げることができることとなって、作業効率の低下を防ぎ、生産コストの高騰を抑制することができる。
【００１８】
なお、本発明は上記実施の形態に限定されるものではない。例えば、凹部１２の形状は任意であって、上記の略Ｌ字形状に限らず、円弧形状等でもよい。また、下傾斜面１３及び上傾斜面２３の傾斜角を６０度としたが、押圧ゴム８２で押圧した際に、上傾斜面２３が下傾斜面１３上を摺動して凹部１２に嵌合できるものであれば、その角度は問わない。また、平面視で略長方形の底面の隣り合う辺で折り曲げたが、平面視で単純に一つの向きに拡開するものであれば、多角形の底面の隣接しない辺でも三辺以上でもよい。
【００１９】
【発明の効果】
請求項１に記載の発明によれば、第一成形型上に、被加工部材の端部が凹部の上方に位置するように取り付け、次いで、第二成形型を、凹部の上方に位置する被加工部材上に載置し、次いで、押圧ゴムにより第二成形型を第一成形型に向けて押圧するので、一回のゴムプレス成形で被加工部材をゴムプレス成形型に密着させて折り曲げることができ、作業効率の低下を防ぎ、生産コストの高騰を抑制することができる。
【００２０】
請求項２に記載の発明によれば、第一成形型は、凹部に互いに異なる向きに傾斜する複数の下傾斜面と、各下傾斜面に対向するとともに、第二成形型が凹部に嵌合する際に、第二成形型によって押圧される複数の押圧面と、を備え、第二成形型は、凹部に嵌合する際に、各下傾斜面を押圧する複数の上傾斜面を備え、上傾斜面を下傾斜面に摺動させながら、第二成形型を第一成形型に嵌合させて、被加工部材をゴムプレス成形するので、一回のゴムプレス成形で被加工部材を第一成形型に密着させて折り曲げることができることとなって、作業効率の低下を防ぎ、生産コストの高騰を抑制することができる。
【００２１】
請求項３に記載の発明によれば、ゴムプレス成形型は、複数の下傾斜面と、各下傾斜面に対向するとともに、第二成形型が凹部に嵌合する際に、第二成形型によって押圧される複数の押圧面と、を有する第一成形型と、凹部に嵌合する際に、各下傾斜面を押圧する複数の上傾斜面が形成された第二成形型と、を備えるので、一回のゴムプレス成形で被加工部材を第一成形型に密着させて折り曲げることができることとなって、作業効率の低下を防ぎ、生産コストの高騰を抑制することができる。
【図面の簡単な説明】
【図１】本発明の実施の形態のゴムプレス成形型の平面図である。
【図２】上記実施の形態におけるゴムプレス成形型のＡ−Ａ断面図である。
【図３】上記実施の形態におけるゴムプレス成形型に被加工部材を取り付けた平面図である。
【図４】上記実施の形態におけるゴムプレス成形型に被加工部材を取り付けたＢ−Ｂ断面図である。
【図５】上記実施の形態における押圧ゴムでゴムプレス成形凸型を押圧している途中の平面図である。
【図６】上記実施の形態における押圧ゴムでゴムプレス成形凸型を押圧している途中のＣ−Ｃ側断面図である。
【図７】上記実施の形態における押圧ゴムでゴムプレス成形凸型を押圧し終えたときの平面図である。
【図８】上記実施の形態における押圧ゴムでゴムプレス成形凸型を押圧し終えたときのＤ−Ｄ側断面図である。
【図９】上記実施の形態における成形された被加工部材の斜視図である。
【図１０】従来技術におけるゴムプレス成形型に被加工部材を取り付けた平面図である。
【図１１】従来技術におけるゴムプレス成形型に被加工部材を取り付けた側面図である。
【図１２】従来技術における押圧ゴムでゴムプレス成形凸型を押圧している途中の側面図である。
【図１３】従来技術における押圧ゴムでゴムプレス成形凸型を押圧し終えたときの側面図である。
【図１４】従来技術における成形された被加工部材の斜視図である。
【符号の説明】
１　　　ゴムプレス成形凹型（第一成形型）
１２　　凹部
１３　　下傾斜面
１４　　押圧面
２　　　ゴムプレス成形凸型（第二成形型）
２３　　上傾斜面
７　　　被加工部材
８２　　押圧ゴム
１０　　ゴムプレス成形型[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a rubber press molding method and a rubber press molding die, and more particularly to a rubber press molding method and a rubber press molding die in which a flat sheet metal part is bent to form a wall surface portion on a bottom surface and a side surface thereof.
[0002]
[Prior art]
When a sheet metal part is formed by a rubber press forming machine, for example, a rubber press forming die 101 as shown in FIGS. 10 and 11 is used. The rubber press forming die 101 has an upper surface formed substantially in a horizontal plane, and a concave portion 102 used when forming the workpiece 104 is formed in a part of the upper surface. The workpiece 104 is fixed to a horizontal surface portion of the rubber press mold 101 by a plate 103 and a pin 105, and the workpiece 104 projecting above the recess 102 is, as shown in FIGS. It is pressed into the recess 102 by the pressing action of the pressing rubber 100 of the molding machine, and is formed into a shape as shown in FIG.
However, as shown in FIG. 13, when the workpiece 104 is bent at the recess 102, the pressing rubber 100 presses the workpiece 104 from above to below, and presses the workpiece 104 from the lateral direction. Since the force was weak, it was not possible to bend the rubber press mold 101 so as to be in close contact therewith.
Therefore, in order to solve this problem, a method of performing a second rubber press molding through a block that fits a workpiece that could not be completely bent by one rubber press molding into a rubber press molding die. Is disclosed (for example, refer to Patent Document 1).
[0003]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 2000-140950
[Problems to be solved by the invention]
However, in the above method, the rubber press molding step is required twice, so that the working efficiency is reduced and the production cost is increased.
[0005]
Accordingly, an object of the present invention is to provide a rubber press molding method that can hold a workpiece in close contact with a rubber press mold and bend it in a single rubber press molding, thereby preventing a decrease in work efficiency and suppressing a rise in production cost. And a rubber press mold.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 is a rubber press for bending a flat plate-shaped workpiece by pressing rubber, and forming a bottom surface and a wall surface erected on a side intersecting the bottom surface. In a molding method, an end of the workpiece is located above the concave portion on a first mold having a concave portion having a lower inclined surface on an upper surface such that an opening area is widened upward on a side wall. The workpiece is arranged as described above, and then, on the workpiece located above the recess, an upper inclined surface having the same inclination angle as the lower inclined surface is provided on a side wall and fitted into the first molding die. The second mold to be fitted is placed, and then the second mold is pressed toward the first mold by the pressing rubber, whereby the upper inclined surface of the second mold is moved to the first mold. While sliding on the lower inclined surface of the mold, Is fitted in the recess, said workpiece characterized by rubber press forming.
[0007]
According to the first aspect of the present invention, the workpiece is mounted on the first mold so that the end of the workpiece is located above the recess, and then the second mold is placed on the workpiece located above the recess. It is placed on the processing member, and then the second mold is pressed toward the first mold by the pressing rubber, so that the second mold moves toward the concave portion and is located at the bottom of the second mold. The workpiece is deformed as the second mold moves. Then, the second molding die is fitted to the first molding die, and the workpiece is subjected to rubber press molding, so that the end of the workpiece is formed along the concave portion, and the rubber is formed once. The member to be processed can be bent in close contact with the rubber press mold by press molding, thereby preventing a decrease in work efficiency and suppressing a rise in production cost.
[0008]
According to a second aspect of the present invention, in the rubber press molding method according to the first aspect, the first mold includes a plurality of the lower inclined surfaces inclined in different directions from each other in the concave portion, and And a plurality of pressing surfaces pressed by the second mold when the second mold is fitted in the recess, and the second mold is fitted in the recess. In this case, a plurality of the upper inclined surfaces for pressing each lower inclined surface are provided, and the upper inclined surface is pressed by the pressing rubber toward the first molding die to thereby lower the upper inclined surface to the lower inclined surface. The workpiece is pressed into the plurality of pressing surfaces while being fitted into the recess while sliding on the surface, and is molded.
[0009]
According to the second aspect of the present invention, the first mold has a plurality of lower inclined surfaces inclined in different directions in the recess, and the lower mold faces the lower inclined surfaces, and the second mold fits into the recess. A plurality of pressing surfaces pressed by the second mold, when the second mold is fitted into the recess, provided with a plurality of upper inclined surface pressing each lower inclined surface, The second mold is fitted to the first mold while sliding the upper inclined surface to the lower inclined surface, and the workpiece is subjected to rubber press molding. The mold moves inward, and eventually the upper inclined surface slides down into the concave portion while sliding on the lower inclined surface, and the second mold is fitted into the concave portion, and the workpiece is pressed onto the pressing surface. Can be pressed and molded.
Therefore, the member to be processed can be folded in close contact with the first molding die in one rubber press molding, and a decrease in work efficiency can be prevented, and a rise in production cost can be suppressed.
[0010]
The invention according to claim 3 is a rubber press molding die used in the rubber press molding method according to claim 2, wherein the plurality of lower inclined surfaces and the lower inclined surfaces are opposed to each other. When the two molds fit into the recess, the first mold having a plurality of pressing surfaces pressed by the second mold, and when fitting into the recess, each lower inclined surface And a second mold on which the plurality of upper inclined surfaces to be pressed are formed.
[0011]
According to the invention as set forth in claim 3, the rubber press molding die faces the plurality of lower inclined surfaces and each lower inclined surface, and when the second molding die is fitted into the concave portion, the second molding die is formed. A first molding die having a plurality of pressing surfaces pressed by the first molding die, and a second molding die formed with a plurality of upper inclined surfaces that press the respective lower inclined surfaces when fitted into the recesses. Therefore, with the deformation of the workpiece, the second mold moves inward, and eventually the upper inclined surface slides down into the recess while sliding on the lower inclined surface. The workpiece can be pressed into the pressing surface by being fitted into the recess, and can be molded.
Therefore, the member to be processed can be folded in close contact with the first molding die in one rubber press molding, and a decrease in work efficiency can be prevented, and a rise in production cost can be suppressed.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a rubber press mold and a rubber press molding method according to an embodiment of the present invention will be described in detail.
First, the rubber press mold 10 will be described.
As shown in FIGS. 1 to 4, a rubber press molding die 10 is mounted on a bottom plate 81 of a rubber press, and is a rubber press molding concave die as a first molding die for holding and fixing a workpiece 7 to be molded. 1. Pressed by a pressing rubber 82 of a rubber press machine, the workpiece 7 is sandwiched between the rubber press molding concave mold 1 and the rubber press molding convex mold 2 as a second molding die, and placed on the rubber press molding concave mold 1. And a plate 3 placed on the upper surface of the processed workpiece 7.
[0013]
The rubber press-molded concave mold 1 is a box having a substantially rectangular shape in a plan view, and has a substantially horizontal plane portion 11 formed on an upper surface thereof. A substantially L-shaped concave portion 12 is formed in a part of the upper surface along two adjacent sides. In the recess 12, the surface on the outer peripheral side of the rubber press-molded concave mold 1 and the surfaces at both ends of the substantially L-shape are inclined in different directions from each other so that the opening area gradually expands upward. A plurality of (for example, two) lower inclined surfaces 13 are formed. The lower inclined surface 13 is formed to have an inclination of, for example, 60 degrees with respect to the upper surface of the rubber press molded concave mold 1. A plurality of (for example, two) pressing surfaces 14 pressed by the rubber press-molding convex mold 2 when the rubber press-molding convex mold 2 fits into the concave portion 12 are provided on the side wall facing each lower inclined surface 13. Is formed. In addition, it is preferable that the inclination angle of the lower inclined surface 13 with respect to the upper surface of the rubber press molded concave mold 1 is in a range of 45 to 60 degrees.
The workpiece 7 is fixed so as to cover the recess 12. The bent portion is positioned at the uppermost inner edge of the concave portion 12, and the workpiece 7 is fixed such that the end of the workpiece 7 is located slightly inside (for example, 2 to 3 mm) from the outer edge.
[0014]
The rubber press-molded convex mold 2 has a substantially L-shape similar to the concave part 12 of the rubber press molded concave mold 1, and when fitted into the concave part 12, the upper surface thereof is substantially flush with the flat part 11 of the rubber press molded concave mold 1. It is formed to be one. Further, when the rubber press-molded convex mold 2 is fitted into the concave portion 12, an upper inclined surface 23 having substantially the same inclination as the lower inclined surface 13 is formed at a portion facing the lower inclined surface 13 of the concave portion 12. ing.
The size of the rubber press-molded convex mold 2 in the present embodiment is such that the uppermost surfaces of the respective molds coincide with each other when the rubber press-molded convex mold 2 is pushed into the recess 12 together with the workpiece 7 to the end. The dimensions of the rubber press-molding convex mold 2 in the present embodiment are 140 mm in width, 95 mm in length, 45 mm in width and 30 mm in height in FIG.
[0015]
The plate 3 presses the workpiece 7 placed on the flat portion 11 of the rubber press-molded concave mold 1 from the upper surface, and is formed in a substantially rectangular shape in plan view. A hole 31 for inserting a pin or the like (not shown) is formed in the plate 3. By inserting a pin or the like through the hole 31, the plate 3, the workpiece 7 and the rubber press-formed concave mold are formed. 1 are connected. The pins inserted into the holes 31 do not protrude from the upper surface of the plate 3 so as not to hinder the rubber press.
[0016]
Next, a rubber press molding method using the rubber press molding die 10 will be described.
First, as shown in FIGS. 3 and 4, the rubber press-molded concave mold 1 is placed on the bottom plate 81 of the rubber press.
Next, the workpiece 7 is attached to the flat portion 11 of the rubber press-formed concave mold 1 such that the bent portion of the workpiece 7 is located above the concave portion 12, and the plate 3 is placed on the upper surface of the workpiece 7; The rubber press-molded concave mold 1, the workpiece 7, and the plate 3 are connected by inserting a pin or the like through the hole 31.
Next, the rubber press-molding convex mold 2 is placed so that a part of the rubber press-molding convex mold 2 is located on the workpiece 7 located above the concave portion 12. That is, about 10% (for example, 2 to 3 mm) of the width of the lowermost surface is overlapped with the rubber press molded concave mold 1.
Next, as shown in FIGS. 5 to 8, the rubber press-molded convex mold 2 is pressed by the rubber press 82 of the rubber press machine, and the upper inclined surface 23 of the rubber press-molded convex mold 2 is moved below the rubber press-molded concave mold 1. While sliding on the inclined surface 13, the rubber press-molded convex mold 2 is fitted into the rubber press-molded concave mold 1, and the workpiece 7 is subjected to rubber press molding. At this time, the rubber press-molded convex mold 2 is in a state of pressing the pressing surface 14 of the concave portion 12 via the workpiece 7.
Next, the rubber press-molded convex mold 2 is removed from the concave portion 12 and the plate 3 is removed, and the workpiece 7 molded as shown in FIG.
[0017]
According to the rubber press molding method using the rubber press molding die 10 of the present invention, when the rubber press molding convex mold 2 is pressed by the pressing rubber 82, the workpiece 7 in contact with the rubber press molding convex mold 2 is pressed. Is deformed toward the inside of the concave portion 12. At this time, the pressing rubber 82 is also deformed in conformity with the outer edge of the rubber press-molding convex mold 2, and the pressing rubber 82 that has entered the upper inclined surface 23 restricts the outward movement of the rubber press-molding convex mold 2. Then, when the pressing rubber 82 further presses the rubber press-molding convex mold 2, the rubber press-molding convex mold 2 also receives a pressing force from the side by the pressing rubber 82. Since the support rigidity and the deformation of the pressing rubber 82 at the lower portion of the rubber press-molding convex mold 2 increase toward the outside, the pressing force from the side also increases toward the outside, and the deformation of the workpiece 7 further increases. Accordingly, the rubber press-molding convex mold 2 moves inward. Eventually, the rubber press-molded convex mold 2 slides down into the concave portion 12 while the upper inclined surface 23 slides on the lower inclined surface 13, and when the rubber mold is completely fitted into the concave portion 12, the rubber press-molded convex 2 passes through the workpiece 7. Since the pressing surface 14 is pressed, the workpiece 7 can be formed along the flat portion 11 or the concave portion 12.
Accordingly, the workpiece 7 can be folded in close contact with the rubber press-molded concave mold 1 by one rubber press molding, whereby a decrease in work efficiency can be prevented and a rise in production cost can be suppressed.
[0018]
Note that the present invention is not limited to the above embodiment. For example, the shape of the concave portion 12 is arbitrary, and is not limited to the above-described substantially L shape, but may be an arc shape or the like. Although the inclination angles of the lower inclined surface 13 and the upper inclined surface 23 are set to 60 degrees, when pressed by the pressing rubber 82, the upper inclined surface 23 slides on the lower inclined surface 13 and fits into the recess 12. The angle does not matter as long as it can. In addition, in the plan view, the bottom is bent at the adjacent side of the substantially rectangular bottom surface. However, as long as it is simply expanded in one direction in the plan view, the side of the polygonal bottom surface may be non-adjacent or three or more sides.
[0019]
【The invention's effect】
According to the first aspect of the present invention, the workpiece is mounted on the first mold so that the end of the workpiece is located above the recess, and then the second mold is placed on the workpiece located above the recess. It is placed on the processing member, and then the second molding die is pressed toward the first molding die by the pressing rubber, so that the workpiece is brought into close contact with the rubber pressing molding die and bent in one rubber press molding. Thus, a decrease in work efficiency can be prevented, and a rise in production cost can be suppressed.
[0020]
According to the second aspect of the present invention, the first mold has a plurality of lower inclined surfaces inclined in different directions in the recess, and the lower mold faces the lower inclined surfaces, and the second mold fits into the recess. A plurality of pressing surfaces pressed by the second mold, when the second mold is fitted into the recess, provided with a plurality of upper inclined surface pressing each lower inclined surface, The second mold is fitted to the first mold while sliding the upper inclined surface to the lower inclined surface, and the workpiece is subjected to rubber press molding. Since it can be bent in close contact with one molding die, a decrease in work efficiency can be prevented, and a rise in production cost can be suppressed.
[0021]
According to the invention as set forth in claim 3, the rubber press molding die faces the plurality of lower inclined surfaces and each lower inclined surface, and when the second molding die is fitted into the concave portion, the second molding die is formed. A first molding die having a plurality of pressing surfaces pressed by the first molding die, and a second molding die formed with a plurality of upper inclined surfaces that press the respective lower inclined surfaces when fitted into the recesses. Therefore, the member to be processed can be folded in close contact with the first molding die in one rubber press molding, so that a decrease in work efficiency can be prevented and a rise in production cost can be suppressed.
[Brief description of the drawings]
FIG. 1 is a plan view of a rubber press mold according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of the rubber press mold of the above embodiment taken along line AA.
FIG. 3 is a plan view in which a workpiece is attached to a rubber press mold according to the embodiment.
FIG. 4 is a cross-sectional view of the rubber press mold according to the embodiment, in which a workpiece is attached to the rubber press mold.
FIG. 5 is a plan view in the middle of pressing a rubber press molded convex with a pressing rubber according to the embodiment.
FIG. 6 is a cross-sectional side view taken along the line CC in the middle of pressing the rubber press molded convex with the pressing rubber according to the embodiment.
FIG. 7 is a plan view when pressing a rubber press-molded convex with a pressing rubber according to the embodiment.
FIG. 8 is a cross-sectional view taken along the line DD when pressing the rubber press molded convex with the pressing rubber according to the embodiment.
FIG. 9 is a perspective view of a formed workpiece in the embodiment.
FIG. 10 is a plan view in which a workpiece is attached to a rubber press mold according to the related art.
FIG. 11 is a side view in which a workpiece is attached to a rubber press mold according to a conventional technique.
FIG. 12 is a side view in the middle of pressing a rubber press molded convex with a pressing rubber according to a conventional technique.
FIG. 13 is a side view showing a state in which a rubber press molding convex has been pressed with a pressing rubber according to a conventional technique.
FIG. 14 is a perspective view of a formed workpiece according to the related art.
[Explanation of symbols]
1 Rubber press molding concave mold (first molding mold)
12 concave portion 13 lower inclined surface 14 pressing surface 2 rubber press molding convex type (second molding die)
23 Upper inclined surface 7 Workpiece 82 Pressing rubber 10 Rubber press mold

Claims

A rubber press molding method of bending a flat sheet metal workpiece by pressing rubber, and molding a bottom surface and a wall surface erected on each side intersecting the bottom surface.
On the first mold provided on the upper surface with a concave portion having a lower inclined surface such that an opening area of the side wall increases upward, the processed member is positioned such that an end of the processed member is located above the concave portion. And place
Next, on the workpiece located above the concave portion, a second molding die that fits with the first molding die is provided while an upper inclined surface having the same inclination angle as the lower inclined surface is provided on a side wall. ,
Next, by pressing the second mold toward the first mold by the pressing rubber, the upper inclined surface of the second mold is slid on the lower inclined surface of the first mold. A rubber press molding method, wherein the workpiece is subjected to rubber press molding while being fitted into the recess.

The rubber press molding method according to claim 1,
The first mold, the plurality of lower inclined surfaces inclined in different directions to the concave portion,
While facing each lower inclined surface, when the second mold is fitted into the recess, a plurality of pressing surfaces pressed by the second mold, and
The second mold includes a plurality of upper inclined surfaces that press each lower inclined surface when fitting into the concave portion,
By pressing the second mold toward the first mold by the pressing rubber, the upper inclined surface is fitted to the concave portion while sliding the upper inclined surface to the lower inclined surface, and the workpiece is processed. A rubber press molding method, characterized in that molding is performed by pressing the plurality of pressing surfaces.

A rubber press mold used in the rubber press molding method according to claim 2,
A plurality of the lower inclined surfaces, and a plurality of pressing surfaces opposed to the respective lower inclined surfaces and having a plurality of pressing surfaces pressed by the second molding die when the second molding die fits into the concave portion. A mold and
When fitted in the concave portion, a second mold having a plurality of the upper inclined surfaces that press each lower inclined surface,
A rubber press mold comprising: