JP2004255415A - Structure of closing locator hole and press forming die for attaining the closing structure - Google Patents

Structure of closing locator hole and press forming die for attaining the closing structure Download PDF

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Publication number
JP2004255415A
JP2004255415A JP2003048987A JP2003048987A JP2004255415A JP 2004255415 A JP2004255415 A JP 2004255415A JP 2003048987 A JP2003048987 A JP 2003048987A JP 2003048987 A JP2003048987 A JP 2003048987A JP 2004255415 A JP2004255415 A JP 2004255415A
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JP
Japan
Prior art keywords
press
closing
hole
workpiece
locating
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.)
Pending
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JP2003048987A
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Japanese (ja)
Inventor
Minoru Sato
穣 佐藤
千秋 ▲高▼山
Chiaki Takayama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nissan Motor Co Ltd
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Nissan Motor Co Ltd
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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP2003048987A priority Critical patent/JP2004255415A/en
Publication of JP2004255415A publication Critical patent/JP2004255415A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a locator hole closing structure that closes a locator hole simultaneously with press forming and that eliminates a work process for closing this locator hole. <P>SOLUTION: In the closing structure of the locator hole, a locator hole 2 formed in a workpiece 1 to be press-formed is fitted with a locator pin 12 projectingly provided in a press forming die 10, thereby positioning the workpiece 1. A plugging member 3 is preliminarily engaged with and retained on this locator pin 12 and then fitted with the locator hole 2 by press forming, so that the locator hole 2 is closed by the plugging member 3. Thus, a work process for closing the locator hole 2 after press-forming can be eliminated. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、プレス成形時に被加工物に形成したロケート穴の閉塞構造およびその閉塞構造を達成するプレス成形金型に関する。
【0002】
【従来の技術】
一般に外形が決定された状態で被加工物を精度良くプレス加工する場合、例えば、車体パネルのパーツをトランスファー装置などによって成形する場合があり、そのパーツなどの被加工物をプレス成形金型に対して位置決めする必要がある。
【0003】
その位置決めの一般的な手法としては、プレス成形金型にロケートピンを突設する一方、被加工物のプレス成形箇所を外れた部位にロケート穴を形成し、このロケート穴をロケートピンに嵌合する方法がある。
【0004】
ところで、このようにして形成したロケート穴は、気密性や液密性を保つために最終的に閉塞する場合があり、従来ではゴム製のグロメットをロケート穴に嵌着するようにしている(例えば、特許文献1参照。)。
【0005】
【特許文献1】
特開2001−298833号公報(第3頁、第2図)
【0006】
【発明が解決しようとする課題】
しかしながら、かかる従来のロケート穴の閉塞構造では、プレス成形後にロケート穴にグロメットを取り付けることになるため、このグロメットを取り付けるための作業工程を余分に必要とし、この作業工程の増加により生産性の低下が生じてしまう。
【0007】
そこで、本発明はプレス成形と同時にロケート穴の閉塞を可能として、このロケート穴を閉塞するための作業工程を省略することができるロケート穴の閉塞構造およびその閉塞構造を達成するプレス成形金型を提供するものである。
【0008】
【課題を解決するための手段】
本発明にあっては、プレス成形する被加工物に形成したロケート穴を最終的に閉塞するにあたって、プレス成形金型に突設したロケートピンに予め嵌合保持され、プレス形成によりロケート穴に嵌着する閉塞部材を設け、この閉塞部材の嵌着によってロケート穴を閉塞することを特徴としている。
【0009】
【発明の効果】
本発明によれば、閉塞部材をプレス成形金型のロケートピンに嵌合保持させておくことにより、プレス成形と同時にこの閉塞部材でロケート穴を閉塞できるため、プレス成形後にロケート穴を閉塞するための作業工程を省略して、生産性を向上することができる。
【0010】
【発明の実施の形態】
以下、本発明の実施形態を図面と共に詳述する。
【0011】
図1〜図5は本発明にかかるロケート穴の閉塞構造およびその閉塞構造を達成するプレス成形金型の一実施形態を示し、図1はプレス成形する被加工物に形成したロケート穴と閉塞部材を示す斜視図、図2はプレス成形金型によるプレス成形の途中を示すロケート穴およびロケートピン部分の断面図、図3は閉塞部材をロケートピンにセットした状態を示す断面図、図4は図2中A部の拡大断面図、図5は閉塞部材によるロケート穴の閉塞状態を示す断面図である。
【0012】
本実施形態は図1に示すように車体パネルなどの平板状の被加工物1を、図2に示すプレス成形金型10を用いてプレス成形する際に、被加工物1に形成したロケート穴2を、プレス成形金型10の第1金型としてのプレス下型11から突設したロケートピン12に嵌合して、前記被加工物1を位置決めするようにしている。尚、図1では被加工物1をロケート穴2の周縁部のみを矩形状にして示してある。
【0013】
前記プレス成形金型10は、前記プレス下型11に対向して第2金型としてのプレス上型13が設けられ、これらプレス下型11とプレス上型13との間に被加工物1を挟圧してプレス成形する。
【0014】
前記ロケートピン12は、図2に示すようにプレス下型11からプレス上型13に向かって上方に突設し、プレス上型13にはそのロケートピン12およびこれに嵌合した後述の閉塞部材3を嵌合する受容部14を形成してある。
【0015】
ここで、本実施形態では図1に示すように前記ロケート穴2を閉塞する閉塞部材3を設けてあり、この閉塞部材3は、図1に示すように先端(上端)が錐状の尖端3aとなる筒状に形成され、その基端部(下端部)に鍔部3bを形成してある。
【0016】
閉塞部材3は被加工物1と同一材料、若しくは被加工物1と略同等の剛性を備えた材料で形成してあり、例えば被加工物1が車体パネルである場合、この車体パネルが鋼板では閉塞部材3を鉄によって形成し、また、車体パネルがアルミ合金では閉塞部材3をアルミ合金によって形成する。
【0017】
そして、図3に示すように、被加工物1をプレス成形金型10にセットする前に、前記閉塞部材3をプレス下型11のロケートピン12に予め嵌合保持させ、その閉塞部材3の外周に被加工物1のロケート穴2を嵌合し、プレス成形によって閉塞部材3をロケート穴2に嵌着して閉塞するようにしている。
【0018】
つまり、前記プレス成形金型10は、ロケートピン12の外周を保持部12aとして、この保持部12aに前記閉塞部材3を嵌合保持するとともに、プレス上型13に、プレス下型12とプレス上型13との挟圧力で閉塞部材3をロケート穴2に嵌着固定させる結合手段15を設けてある。
【0019】
従って、閉塞部材3をロケートピン12に嵌合保持させる関係上、図3に示すように、閉塞部材3の内径d1はロケートピン12の外径d2と略等しくし、かつ、前記ロケート穴2の開口径d3は閉塞部材3の外径d4と略等しくしてあり、かつ、図2に示すように、プレス上型13に形成した受容部14の内径d5も閉塞部材3の外径d4と略等しくしてある。
【0020】
また、プレス下型11から突設したロケートピン12の周囲には、図2,図3に示すように閉塞部材3の鍔部3bを受容する円形凹部11aを形成してある。
【0021】
前記結合手段15は、図4に示すように、プレス上型13の受容部14の周縁部に形成した凸部15aとして構成し、プレス成形時にこの凸部15aが被加工物1のロケート穴2の周縁部を圧潰して、このロケート穴2の内周に閉塞部材3に圧接する突出部2aを形成するようにしている。
【0022】
つまり、前記凸部15aによってロケート穴2の周縁部を圧潰すると、図5に示すように、この圧潰部分に窪み2bが形成され、この窪み2bに略相当する体積分がロケート穴2の内周から突出部2aとして膨出することになる。
【0023】
また、前記凸部15aによってロケート穴2の内周に突出部2aを形成する際、前記閉塞部材3の外周には、その突出部2aを圧入する凹部3cを形成してある。
【0024】
以上の構成により本実施形態のロケート穴2の閉塞構造にあっては、閉塞部材3をプレス成形金型10のロケートピン12に予め嵌合保持させておくことにより、プレス成形と同時にこの閉塞部材3でロケート穴2を閉塞できるため、プレス成形後に閉塞部材3をロケート穴2に取り付けるための余分な工程を不要とすることができるため、作業工程の削減を図って生産性を向上することができる。
【0025】
また、本実施形態ではかかる作用効果に加えて、閉塞部材3の外周に、プレス成形時にロケート穴2の周縁部を圧潰して、このロケート穴2の内周に膨出する突出部2aが圧入する凹部3cを形成したので、被加工物1と閉塞部材3とを一体化して、閉塞部材3の取付け部分の密閉性を高くし、気密性および液密性に優れた閉塞構造を提供することができる。
【0026】
尚、図5に示すように閉塞部材3の鍔部3b側にシール材16を付設しておくことにより、閉塞部材3の取付け部分の密閉性を更に高めることができる。
【0027】
更に、閉塞部材3は、被加工物1と同一材料、若しくは被加工物1と略同等の剛性を備えた材料で形成したので、ロケート穴2の形成部分の強度を高く維持することができる。
【0028】
また、本実施形態のプレス成形金型10にあっては、プレス下型11に突設したロケートピン12の保持部12aに閉塞部材3を嵌合保持するとともに、プレス上型13に結合手段15を設けて、プレス下型11とプレス上型13の挟圧力で閉塞部材3をロケート穴2に嵌着固定させるようにしたので、前記プレス成形金型10を使用することにより、本実施形態のロケート穴2の閉塞構造を達成できるとともに、ロケートピン12に保持部12aを設け、かつ、プレス上型13に結合手段15を設けるという簡単な構造によって、閉塞部材3を後付けするという作業工程を省略できることになる。
【0029】
更に、前記結合手段15をプレス上型13に設けた凸部15aで形成して、プレス成形時に被加工物1のロケート穴2の周縁部をその凸部15aで圧潰して、このロケート穴2の内周に閉塞部材3に圧接する突出部2aを形成するようにしたので、プレス上型13に凸部15aを形成するという簡単な構造をもって、被加工物1と閉塞部材3とを大きな結合強度をもって一体化することができる。
【0030】
ところで、本発明は前記実施形態に例をとって説明したが、この実施形態に限ることなく本発明の要旨を逸脱しない範囲で他の実施形態を各種採ることができる。
【図面の簡単な説明】
【図1】本発明の一実施形態におけるプレス成形する被加工物に形成したロケート穴と閉塞部材を示す部分斜視図。
【図2】本発明の一実施形態におけるプレス成形金型によるプレス成形の途中を示すロケート穴およびロケートピン部分の断面図。
【図3】本発明の一実施形態における閉塞部材をロケートピンにセットした状態を示す断面図。
【図4】図2中A部の拡大断面図。
【図5】本発明の一実施形態における閉塞部材によるロケート穴の閉塞状態を示す断面図。
【符号の説明】
1 被加工物
2 ロケート穴
2a 突出部
3 閉塞部材
3c 凹部
10 プレス成形金型
11 プレス下型(第1金型)
12 ロケートピン
13 プレス上型(第2金型)
15 結合手段
15a 凸部
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a closed structure of a locating hole formed in a workpiece at the time of press forming, and a press mold for achieving the closed structure.
[0002]
[Prior art]
In general, when a workpiece is pressed with high precision in a state where the outer shape is determined, for example, there is a case where parts of a body panel are formed by a transfer device or the like, and the workpiece such as the parts is pressed into a press molding die. Need to be positioned.
[0003]
As a general method of the positioning, a locating pin is protruded from a press-molding die, a locating hole is formed in a portion of the workpiece outside a press-molded portion, and the locating hole is fitted to the locating pin. There is.
[0004]
By the way, the locating hole formed in this way may be finally closed in order to maintain airtightness and liquid tightness, and conventionally, a rubber grommet is fitted into the locating hole (for example, And Patent Document 1.).
[0005]
[Patent Document 1]
JP 2001-298833 A (Page 3, FIG. 2)
[0006]
[Problems to be solved by the invention]
However, in such a conventional closed structure of the locate hole, since a grommet is attached to the locate hole after press molding, an extra work process for attaching the grommet is required, and productivity is reduced due to an increase in the number of work processes. Will occur.
[0007]
Therefore, the present invention provides a locate hole closing structure capable of closing a locate hole at the same time as press molding, and a work process for closing the locate hole can be omitted, and a press molding die that achieves the close structure. To provide.
[0008]
[Means for Solving the Problems]
According to the present invention, when the locating hole formed in the workpiece to be press-formed is finally closed, the locating pin is previously fitted and held on a locating pin protruding from the press-molding die, and is fitted into the locating hole by press forming. The locating hole is closed by fitting the closing member.
[0009]
【The invention's effect】
According to the present invention, since the closing member is fitted and held in the locating pin of the press-molding die, the locating hole can be closed with the closing member at the same time as the press forming, so that the locating hole is closed after the press forming. Work steps can be omitted, and productivity can be improved.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0011]
1 to 5 show one embodiment of a closed structure of a locate hole according to the present invention and a press-molding die for achieving the closed structure. FIG. 1 shows a locate hole and a closing member formed in a workpiece to be press-formed. FIG. 2 is a cross-sectional view of a locating hole and a locating pin portion in the middle of press molding by a press molding die, FIG. 3 is a cross-sectional view showing a state in which a closing member is set on the locating pin, and FIG. FIG. 5 is an enlarged cross-sectional view of a portion A, and FIG. 5 is a cross-sectional view showing a state in which the locating hole is closed by a closing member.
[0012]
In this embodiment, as shown in FIG. 1, when a flat workpiece 1 such as a car body panel is press-formed using a press-forming die 10 shown in FIG. 2, a locating hole formed in the workpiece 1 is formed. 2 is fitted to a locating pin 12 protruding from a press lower die 11 as a first die of a press molding die 10 to position the workpiece 1. In FIG. 1, the workpiece 1 is shown in a rectangular shape only at the periphery of the locate hole 2.
[0013]
The press forming die 10 is provided with a press upper die 13 as a second die facing the press lower die 11, and the workpiece 1 is placed between the press lower die 11 and the press upper die 13. Press molding with pinching.
[0014]
As shown in FIG. 2, the locating pin 12 projects upward from the lower press die 11 toward the upper press die 13, and the upper press die 13 includes the locating pin 12 and a closing member 3 (described later) fitted thereto. A receiving portion 14 to be fitted is formed.
[0015]
Here, in this embodiment, a closing member 3 for closing the locate hole 2 is provided as shown in FIG. 1, and this closing member 3 has a conical tip 3a as shown in FIG. And a flange 3b is formed at the base end (lower end) thereof.
[0016]
The closing member 3 is formed of the same material as the workpiece 1 or a material having substantially the same rigidity as the workpiece 1. For example, when the workpiece 1 is a vehicle body panel, the vehicle body panel is made of a steel plate. The closing member 3 is made of iron, and when the vehicle body panel is made of an aluminum alloy, the closing member 3 is made of an aluminum alloy.
[0017]
As shown in FIG. 3, before setting the workpiece 1 in the press forming die 10, the closing member 3 is fitted and held in advance on the locating pin 12 of the lower press die 11, and the outer periphery of the closing member 3 is The closing member 3 is fitted into the locate hole 2 by press molding so as to be closed.
[0018]
In other words, the press molding die 10 uses the outer periphery of the locating pin 12 as a holding portion 12a, fits and holds the closing member 3 in the holding portion 12a, and also presses the press lower die 12 and the press upper die A coupling means 15 is provided for fitting and fixing the closing member 3 to the locate hole 2 by a clamping force with respect to 13.
[0019]
Therefore, as shown in FIG. 3, the inner diameter d1 of the closing member 3 is substantially equal to the outer diameter d2 of the locating pin 12, and the opening diameter of the locating hole 2 is increased. d3 is substantially equal to the outer diameter d4 of the closing member 3, and as shown in FIG. 2, the inner diameter d5 of the receiving portion 14 formed on the upper press die 13 is also substantially equal to the outer diameter d4 of the closing member 3. It is.
[0020]
Further, a circular recess 11a for receiving the flange 3b of the closing member 3 is formed around the locate pin 12 protruding from the press lower mold 11, as shown in FIGS.
[0021]
As shown in FIG. 4, the coupling means 15 is configured as a convex portion 15 a formed on a peripheral portion of the receiving portion 14 of the press upper die 13, and the convex portion 15 a is located on the locating hole 2 of the workpiece 1 during press molding. Is crushed to form a protruding portion 2a which is pressed against the closing member 3 on the inner periphery of the locate hole 2.
[0022]
That is, when the peripheral portion of the locate hole 2 is crushed by the convex portion 15a, a dent 2b is formed in the crushed portion as shown in FIG. 5, and a volume substantially corresponding to the dent 2b is formed on the inner periphery of the locate hole 2. Bulge out as a protrusion 2a.
[0023]
When the protrusion 15a forms the protrusion 2a on the inner periphery of the locate hole 2, a recess 3c for press-fitting the protrusion 2a is formed on the outer periphery of the closing member 3.
[0024]
With the above structure, in the closing structure of the locating hole 2 of the present embodiment, the closing member 3 is fitted and held in advance on the locating pin 12 of the press molding die 10 so that the closing member 3 Since the locate hole 2 can be closed by the above, an extra step for attaching the closing member 3 to the locate hole 2 after press molding can be eliminated, so that the number of working steps can be reduced and productivity can be improved. .
[0025]
In addition, in the present embodiment, in addition to such an operation and effect, the outer periphery of the closing member 3 is crushed at the periphery of the locate hole 2 at the time of press molding, and the protruding portion 2 a bulging into the inner periphery of the locate hole 2 is press-fitted. Since the recessed portion 3c is formed, the workpiece 1 and the closing member 3 are integrated with each other, the sealing property of the mounting portion of the closing member 3 is increased, and a closing structure excellent in airtightness and liquid tightness is provided. Can be.
[0026]
By providing the sealing member 16 on the side of the flange 3b of the closing member 3 as shown in FIG. 5, the hermeticity of the mounting portion of the closing member 3 can be further improved.
[0027]
Further, since the closing member 3 is formed of the same material as the workpiece 1 or a material having substantially the same rigidity as the workpiece 1, the strength of the portion where the locate hole 2 is formed can be maintained high.
[0028]
Further, in the press molding die 10 of the present embodiment, the closing member 3 is fitted and held in the holding portion 12a of the locating pin 12 protruding from the lower press die 11, and the coupling means 15 is connected to the upper press die 13. The closing member 3 is fitted and fixed in the locating hole 2 by the clamping force of the lower press die 11 and the upper press die 13. With the simple structure of providing the holding portion 12a on the locating pin 12 and providing the coupling means 15 on the press upper die 13, the working process of retrofitting the closing member 3 can be omitted while achieving the closing structure of the hole 2. Become.
[0029]
Further, the coupling means 15 is formed by a convex portion 15a provided on the upper press die 13, and at the time of press forming, the peripheral portion of the locate hole 2 of the workpiece 1 is crushed by the convex portion 15a. Is formed on the inner periphery of the work piece 1 with a simple structure in which the protrusion 15a is formed on the upper press die 13, so that the work piece 1 and the work piece 3 can be largely connected. It can be integrated with strength.
[0030]
By the way, the present invention has been described by taking the above embodiment as an example, but the present invention is not limited to this embodiment, and various other embodiments can be adopted without departing from the gist of the present invention.
[Brief description of the drawings]
FIG. 1 is a partial perspective view showing a locating hole and a closing member formed in a workpiece to be press-molded according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of a locating hole and a locating pin portion during press molding by a press molding die according to an embodiment of the present invention.
FIG. 3 is a sectional view showing a state in which the closing member according to the embodiment of the present invention is set on the locate pin.
FIG. 4 is an enlarged sectional view of a portion A in FIG. 2;
FIG. 5 is a cross-sectional view showing a state in which the locate hole is closed by the closing member according to the embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Workpiece 2 Locating hole 2a Projecting part 3 Closing member 3c Concave part 10 Press forming die 11 Press lower die (first die)
12 Locating pin 13 Press upper die (second die)
15 Connecting means 15a Convex part

Claims (5)

プレス成形する被加工物に、プレス成形金型に突設したロケートピンに嵌合して該被加工物を位置決めするロケート穴を形成し、このロケート穴を最終的に閉塞するロケート穴の閉塞構造において、
前記ロケートピンに予め嵌合保持され、プレス形成によってロケート穴に嵌着する閉塞部材を設け、この閉塞部材の嵌着によってロケート穴を閉塞したことを特徴とするロケート穴の閉塞構造。
In the workpiece to be press-formed, a locate hole is formed for positioning the workpiece by fitting to a locating pin protruding from the press-molding die, and in the locating hole closing structure for finally closing the locating hole. ,
A locating hole closing structure, wherein a locating member is fitted and held in the locating pin in advance, and is fitted into the locating hole by press forming, and the locating hole is closed by fitting the closing member.
閉塞部材の外周に、プレス成形時にロケート穴の周縁部の圧潰により内周に膨出する突出部を圧入する凹部を形成したことを特徴とする請求項1に記載のロケート穴の閉塞構造。The locating hole closing structure according to claim 1, wherein a concave portion is formed on an outer periphery of the closing member to press-fit a protruding portion that bulges inward due to crushing of a peripheral edge portion of the locating hole during press molding. 前記閉塞部材は、被加工物と同一材料、若しくは被加工物と略同等の剛性を備えた材料で形成したことを特徴とする請求項1または2に記載のロケート穴の閉塞構造。3. The locating hole closing structure according to claim 1, wherein the closing member is formed of the same material as the workpiece or a material having substantially the same rigidity as the workpiece. 被加工物を挟圧してプレス成形する第1,第2金型を備え、これら第1,第2金型の少なくとも一方に、被加工物に形成したロケート穴を嵌合して位置決めするロケートピンを突設したプレス成形金型において、
ロケートピンに、前記ロケート穴を閉塞する閉塞部材を嵌合保持する保持部を設けるとともに、第1,第2金型の少なくとも一方に、これら第1,第2金型の挟圧力で閉塞部材をロケート穴に嵌着固定させる結合手段を設けたことを特徴とするプレス成形金型。
A first and a second mold for pressing and molding a workpiece are provided, and at least one of the first and second molds is provided with a locating pin for fitting and locating a locating hole formed in the workpiece. In the protruding press mold,
The locating pin is provided with a holding portion for fitting and holding a closing member for closing the locating hole, and the closing member is located on at least one of the first and second molds by a clamping force of the first and second molds. A press-molding die provided with coupling means for fitting and fixing in a hole.
結合手段は、第1,第2金型の少なくとも一方に設けられ、プレス成形時に被加工物のロケート穴周縁部を圧潰して、このロケート穴の内周に閉塞部材に圧接する突出部を形成する凸部であることを特徴とする請求項4に記載のプレス成形金型。The coupling means is provided on at least one of the first and second molds, and crushes a peripheral edge portion of the locate hole of the workpiece at the time of press forming to form a protruding portion on the inner periphery of the locate hole for pressing against the closing member. The press-molding die according to claim 4, wherein the convex portion is formed.
JP2003048987A 2003-02-26 2003-02-26 Structure of closing locator hole and press forming die for attaining the closing structure Pending JP2004255415A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7369187B2 (en) 2018-11-15 2023-10-25 ペン エンジニアリング アンド マニュファクチュアリング コーポレイション Machine tooling using rotating punches

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7369187B2 (en) 2018-11-15 2023-10-25 ペン エンジニアリング アンド マニュファクチュアリング コーポレイション Machine tooling using rotating punches

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