JPH09201627A - Burring punch and burring - Google Patents
Burring punch and burringInfo
- Publication number
- JPH09201627A JPH09201627A JP937296A JP937296A JPH09201627A JP H09201627 A JPH09201627 A JP H09201627A JP 937296 A JP937296 A JP 937296A JP 937296 A JP937296 A JP 937296A JP H09201627 A JPH09201627 A JP H09201627A
- Authority
- JP
- Japan
- Prior art keywords
- burring
- processed
- punch
- working part
- cylindrical
- 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.)
- Granted
Links
Landscapes
- Punching Or Piercing (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、バーリング加工、
特に、下穴を突き破った後に連続してしごき加工を行う
ことにより、1工程で金属カスを出さずに金属平板に円
筒形状のバーリング(『はとめ』又は『穴フランジ』等
とも称される)を成形するバーリング加工に用いられる
バーリングポンチ及びそのバーリングポンチによって成
形されるバーリング形状に関する。TECHNICAL FIELD The present invention relates to a burring process,
In particular, by performing ironing continuously after breaking through the prepared hole, a cylindrical burring (also called "Hatome" or "hole flange" etc.) on a metal flat plate without producing metal scrap in one step The present invention relates to a burring punch used in a burring process for molding a burring and a burring shape molded by the burring punch.
【0002】[0002]
【従来の技術】従来から、下穴を突き破った後に連続し
てしごき加工を行うことにより、1工程で金属カスを出
さずに金属平板に円筒形状のバーリングを成形するバー
リング加工には、図4(A)〜(C)に示すようなバー
リングポンチ1が用いられている。2. Description of the Related Art Conventionally, a burring process for forming a cylindrical burring on a metal flat plate without producing metal scraps in one step by continuously performing ironing process after piercing a prepared hole has been performed as shown in FIG. A burring punch 1 as shown in (A) to (C) is used.
【0003】このバーリングポンチ1は、先端に尖る多
角錐形状の第1加工部2aと円柱形状の第2加工部2b
とを有する下穴加工部2と、第2加工部2bから連続す
るバーリング穴加工部3とが一体に形成されている。This burring punch 1 has a polygonal pyramid-shaped first processing portion 2a and a cylindrical second processing portion 2b having a sharp tip.
The prepared hole processing part 2 having a and the burring hole processed part 3 continuous from the second processed part 2b are integrally formed.
【0004】第1加工部2aは、三角形状の傾斜加工面
2c,2c…を、その各面が直行するように各辺に隣接
させることにより四角錐に形成されている。The first processed portion 2a is formed into a quadrangular pyramid by adjoining the triangular inclined processed surfaces 2c, 2c ... To the respective sides so that the respective surfaces are orthogonal to each other.
【0005】バーリング穴加工部3は、第2加工部2b
よりも径の大きい円柱形状を呈しており、第2加工部2
bに連続する部分にはR部3aが形成されている。The burring hole processing portion 3 is the second processing portion 2b.
It has a cylindrical shape with a larger diameter than
An R portion 3a is formed in a portion continuous with b.
【0006】このようなバーリングポンチ1にあって
は、図5(A)に示すように、ダイ4上に金属板5を設
置し、バーリングポンチ1を下降させる。In such a burring punch 1, as shown in FIG. 5A, a metal plate 5 is placed on the die 4 and the burring punch 1 is lowered.
【0007】すると、先ず第1加工部2aによって金属
板5に下穴が形成され、第2加工部2bによってその下
穴加工状態が維持されつつR部3aによって下穴が徐々
に拡開され、図5(B)に示すように、バーリングポン
チ1が下死点へと達するとバーリング穴5aがバーリン
グ穴加工部3によって形成される。Then, the prepared hole is first formed in the metal plate 5 by the first processed portion 2a, and the prepared hole is gradually opened by the R portion 3a while the prepared hole processed state is maintained by the second processed portion 2b. As shown in FIG. 5B, when the burring punch 1 reaches the bottom dead center, the burring hole 5 a is formed by the burring hole processing portion 3.
【0008】この際、図6(A)に示すように、金属板
5に第1加工部2aが突き刺さった状態では、第1加工
部2aの稜線と第2加工部2bとの境界部分に形成され
る辺Pが切れ刃となり、図6(B)に示すように、円周
方向に延びるクラックC´が第1加工部2aによる十字
状のクラックCとは別に形成される(矢印参照)。At this time, as shown in FIG. 6 (A), when the metal plate 5 is pierced with the first processed portion 2a, it is formed at the boundary between the ridge of the first processed portion 2a and the second processed portion 2b. The side P to be cut serves as a cutting edge, and as shown in FIG. 6B, a crack C ′ extending in the circumferential direction is formed separately from the cross-shaped crack C formed by the first processed portion 2a (see arrow).
【0009】従って、バーリング加工終了後の金属板5
には、図6(C)に示すように、円筒部5aと略菱形形
状を呈する4つの凸部5b,5b…とからなるバーリン
グ形状のバーリング5cが形成される。尚、円筒部5a
の立上りはR部3aによって形成されたものである。Therefore, the metal plate 5 after the burring process is completed
As shown in FIG. 6 (C), a burring-shaped burring 5c including a cylindrical portion 5a and four substantially diamond-shaped convex portions 5b, 5b ... Is formed. The cylindrical portion 5a
The rising edge of is formed by the R portion 3a.
【0010】[0010]
【発明が解決しようとする課題】ところで、上記の如く
構成されたバーリングポンチ1によって形成されたバー
リング5cの形状にあっては、複数に分離形成された凸
部5b,5b…の根本にくびれ5d,5d…が形成され
ているため、凸部5b,5b…の剛性が確保されず、例
えば、部品(バーリング加工されたもの)梱包時や搬送
時にその部品を重ねると、部品の重みや搬送時の衝撃に
より凸部5b,5b…が倒れてしまうという問題があっ
た。By the way, in the shape of the burring 5c formed by the burring punch 1 configured as described above, the ridge 5d is formed at the base of the convex portions 5b, 5b ... , 5d ... are not formed, the rigidity of the convex portions 5b, 5b ... Is not ensured. For example, when the parts (barred) are stacked or stacked, the weight of the parts or the time of transfer There is a problem that the convex portions 5b, 5b ...
【0011】この際、凸部5b,5b…の倒れは、バー
リング形状が円筒形であるためにバーリング5cの内側
へと倒れることが多く、凸部5b,5b…がバーリング
5cの内側に倒れてしまうとバーリング5cが塞がれて
しまう。At this time, the protrusions 5b, 5b ... Are often collapsed inside the burring 5c because the burring shape is cylindrical, and the protrusions 5b, 5b ... Are collapsed inside the burring 5c. If this happens, the burring 5c will be blocked.
【0012】また、バーリング5cを加工する際にくび
れ5dを形成する要因であるクラックC´によって凸部
5bに亀裂が発生する虞がある。Further, when the burring 5c is processed, a crack C'which is a factor for forming the constriction 5d may cause a crack in the convex portion 5b.
【0013】本発明は、上記事情に鑑みなされたもので
あって、剛性を確保するためにくびれのない凸部を有す
るバーリング形状を成形することができるバーリングポ
ンチを提供することを目的とする。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a burring punch capable of forming a burring shape having a convex portion without a constriction in order to ensure rigidity.
【0014】[0014]
【課題を解決するための手段】その目的を達成するた
め、請求項1に記載の発明は、複数の傾斜加工面が隣接
する多角錐形状の第1加工部並びに該第1加工部に連続
する円柱形状の第2加工部を有する下穴加工部と、該下
穴加工部から連続するR部を有し且つ前記第2加工部よ
りも大径な円柱形状のバーリング穴加工部とを備えたバ
ーリングポンチにおいて、前記複数の傾斜加工面が隣接
することによって形成された各稜線の中途部から前記第
2加工部側に向かって形成された面取り部を備えている
ことを要旨とする。In order to achieve the object, the invention according to claim 1 is such that a plurality of inclined machining surfaces are continuous to the first machining portion of a polygonal pyramid shape and the first machining portion. A prepared hole processing portion having a cylindrical second processed portion and a cylindrical burring hole processed portion having an R portion continuous from the prepared hole processed portion and having a larger diameter than the second processed portion are provided. The gist of the burring punch is that the burring punch is provided with a chamfered portion that is formed from a middle portion of each ridge line formed by adjoining the plurality of inclined processing surfaces toward the second processing portion side.
【0015】[0015]
【発明の実施の形態】次に、本発明のバーリングポンチ
及びバーリングの実施の形態を、図面に基づいて説明す
る。BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the burring punch and burring of the present invention will be described with reference to the drawings.
【0016】図1において、バーリングポンチ11は、
先端に尖る多角錐形状の第1加工部12aと円柱形状の
第2加工部12bとを有する下穴加工部12と、第2加
工部12bから連続するバーリング穴加工部13とが一
体に形成されている。In FIG. 1, the burring punch 11 is
A prepared hole processing part 12 having a first processed part 12a having a polygonal pyramid shape having a sharp tip and a second processed part 12b having a cylindrical shape, and a burring hole processed part 13 continuous from the second processed part 12b are integrally formed. ing.
【0017】第1加工部12aは、三角形状の複数の傾
斜加工面12c,12c…を、その各面が直行するよう
に各辺に隣接させることにより四角錐に形成すると共
に、複数の傾斜加工面12c,12c…が隣接すること
によって形成された各稜線Rの中途部から第2加工部側
12bに向かって面取り部12d,12d…が形成され
ている。尚、面取り部12dは隣接する傾斜加工面12
c,12cに対して、稜線Rを中心に対称である。The first processing part 12a is formed into a quadrangular pyramid by adjoining a plurality of triangular inclined processing surfaces 12c, 12c, ... The chamfered portions 12d, 12d ... Are formed from the midway portion of each ridge line R formed by the adjacent surfaces 12c, 12c. In addition, the chamfered portion 12d is adjacent to the inclined processed surface 12
It is symmetrical about the ridgeline R with respect to c and 12c.
【0018】バーリング穴加工部13は、第2加工部1
2bよりも大径な円柱形状を呈しており、第2加工部1
2bに連続する部分にはR部13aが形成されている。The burring hole processing section 13 is the second processing section 1
It has a cylindrical shape with a diameter larger than 2b, and the second processing portion 1
An R portion 13a is formed in a portion continuous with 2b.
【0019】このようなバーリングポンチ11にあって
は、図2(A)に示すように、ダイ14上に金属板15
を設置し、バーリングポンチ11を下降させる。In such a burring punch 11, as shown in FIG. 2 (A), the metal plate 15 is placed on the die 14.
Is installed and the burring punch 11 is lowered.
【0020】すると、先ず第1加工部12aによって金
属板15に下穴が形成され、第2加工部12bによって
その下穴加工状態が維持されつつR部13aによって下
穴が徐々に拡開され、図2(B)に示すように、バーリ
ングポンチ11が下死点へと達するとバーリング穴15
aがバーリング穴加工部13によって形成される。Then, the prepared hole is first formed in the metal plate 15 by the first processed portion 12a, the prepared hole is maintained by the second processed portion 12b, and the prepared hole is gradually expanded by the R portion 13a. As shown in FIG. 2B, when the burring punch 11 reaches the bottom dead center, the burring hole 15
a is formed by the burring hole processing portion 13.
【0021】この際、図3(A)に示すように、金属板
15に第1加工部12aが突き刺さった状態では、従来
の第1加工部2aの稜線と第2加工部2bとの境界部分
に形成される辺Pに相当する部分に面取り部12dが形
成されているため、切れ刃がない状態となる。At this time, as shown in FIG. 3A, when the first processed portion 12a is stuck into the metal plate 15, the boundary between the ridge line of the conventional first processed portion 2a and the second processed portion 2b is used. Since the chamfered portion 12d is formed in the portion corresponding to the side P formed in the above, there is no cutting edge.
【0022】しかも、面取り部12dを形成したことに
よって、この面取り部12dの先端側への傾斜角度は従
来の辺Pの先端側への傾斜角度よりも鋭く(先端からの
広がりが狭くなる)なり、その傾斜角度差によって体積
差が生じるため、図3(A)に示した下穴加工に伴う金
属板15の延び伴う残り肉厚W1は、図6(A)に示し
た下穴加工に伴う金属板5の延び伴う残り肉厚W2より
も厚くなる。換言すれば、金属板15の延びに伴う逃げ
を設定することができ、切れ刃が無いことと相俟ってク
ラックC´を発生させ得る要因が解消されている。Moreover, since the chamfered portion 12d is formed, the inclination angle of the chamfered portion 12d toward the tip side becomes sharper (the spread from the tip becomes narrower) than the conventional inclination angle of the side P toward the tip side. Since the difference in inclination angle causes a volume difference, the remaining wall thickness W1 of the metal plate 15 along with the prepared hole machining shown in FIG. 3A is accompanied by the prepared hole machining shown in FIG. 6A. It becomes thicker than the remaining wall thickness W2 accompanying the extension of the metal plate 5. In other words, it is possible to set the clearance that accompanies the extension of the metal plate 15, and the factor that can cause the crack C ′ in combination with the absence of the cutting edge is eliminated.
【0023】従って、図3(B)に示すように、第1加
工部12aによる下穴加工は十字状のクラックCのみと
なり、バーリング加工終了後の金属板15には、図3
(C)に示すように、金属板15の平面部分から突出し
た円筒部15aと、この円筒部15aから連続して同方
向に突出すると共に、その連続部分が最大幅となってい
る略三角形状の4つの凸部15b,15b…とからなる
バーリング形状のバーリング15cが形成される。尚、
円筒部15aの立上りはR部13aによって形成された
ものである。Therefore, as shown in FIG. 3 (B), the prepared hole by the first processed portion 12a is only the cross-shaped crack C, and the metal plate 15 after the burring process has the structure shown in FIG.
As shown in (C), a cylindrical portion 15a protruding from a flat surface portion of the metal plate 15 and a substantially triangular shape which continuously protrudes from the cylindrical portion 15a in the same direction and has the maximum width. A burring-shaped burring 15c is formed by the four convex portions 15b, 15b. still,
The rising of the cylindrical portion 15a is formed by the R portion 13a.
【0024】このように、本発明のバーリングポンチ1
1にあっては、第1加工部12aに面取り部12dを設
けたことによりクラックC´の発生を防止することがで
き、バーリングポンチ11によって形成されたバーリン
グ15cには、従来のくびれ5dの発生を防止すること
ができ、剛性のあるバーリング15cとすることができ
る。As described above, the burring punch 1 of the present invention is used.
In No. 1, the chamfered portion 12d is provided in the first processed portion 12a, so that the generation of the crack C'can be prevented, and the burring 15c formed by the burring punch 11 has the conventional constriction 5d. Can be prevented, and the burring 15c can be made rigid.
【0025】[0025]
【発明の効果】以上説明したように、本発明のバーリン
グポンチにあっては、複数の傾斜加工面が隣接すること
によって形成された各稜線の中途部から第2加工部側に
向かって形成された面取り部を備えていることにより、
剛性を確保するためにくびれのない凸部を有するバーリ
ング形状を成形することができる。As described above, in the burring punch of the present invention, the burrs formed by the adjoining plural inclined working surfaces are formed from the middle part of each ridge line toward the second working part side. By having a chamfered part,
It is possible to form a burring shape having a convex portion having no constriction in order to secure rigidity.
【図1】本発明の実施の形態1に係わるバーリングポン
チを示し、(A)はバーリングポンチの正面図、(B)
はバーリングポンチの先端部分の拡大正面図、(C)は
第1加工部の拡大底面図である。FIG. 1 shows a burring punch according to a first embodiment of the present invention, (A) is a front view of the burring punch, and (B) is a front view of the burring punch.
[Fig. 3] is an enlarged front view of the tip portion of the burring punch, and (C) is an enlarged bottom view of the first processing portion.
【図2】同じく、(A)はバーリング加工前のバーリン
グ加工型の断面図、(B)はバーリング加工後のバーリ
ング加工型の断面図である。2A is a sectional view of a burring die before burring, and FIG. 2B is a sectional view of a burring die after burring.
【図3】同じく、(A)は下穴加工状態のバーリング加
工型の要部の断面図、(B)はクラック発生状態を示す
説明図、(C)はバーリングの斜視図である。3A is a cross-sectional view of a main part of a burring work die in a prepared hole working state, FIG. 3B is an explanatory view showing a cracked state, and FIG. 3C is a perspective view of the burring.
【図4】従来のバーリングポンチを示し、(A)はバー
リングポンチの正面図、(B)はバーリングポンチの先
端部分の拡大正面図、(C)は第1加工部の拡大底面図
である。FIG. 4 shows a conventional burring punch, (A) is a front view of the burring punch, (B) is an enlarged front view of a tip portion of the burring punch, and (C) is an enlarged bottom view of the first processing portion.
【図5】同じく、(A)はバーリング加工前のバーリン
グ加工型の断面図、(B)はバーリング加工後のバーリ
ング加工型の断面図である。5A is a sectional view of a burring die before burring, and FIG. 5B is a sectional view of a burring die after burring.
【図6】同じく、(A)は下穴加工状態のバーリング加
工型の要部の断面図、(B)はクラック発生状態を示す
説明図、(C)はバーリングの斜視図である。6 (A) is a sectional view of a main part of a burring die in a prepared hole state, FIG. 6 (B) is an explanatory view showing a crack occurrence state, and FIG. 6 (C) is a perspective view of the burring.
11…バーリングポンチ 12…下穴加工部 12a…第1加工部 12b…第2加工部 12c…傾斜加工面 12d…面取り部 13…バーリング穴加工部 13a…R部 15…金属板 15c…バーリング R…稜線 11 ... Burring punch 12 ... Pilot hole processing part 12a ... 1st processing part 12b ... 2nd processing part 12c ... Inclined processing surface 12d ... Chamfer part 13 ... Burring hole processing part 13a ... R part 15 ... Metal plate 15c ... Burring R ... Ridge
Claims (3)
第1加工部並びに該第1加工部に連続する円柱形状の第
2加工部を有する下穴加工部と、該下穴加工部から連続
するR部を有し且つ前記第2加工部よりも大径な円柱形
状のバーリング穴加工部とを備えたバーリングポンチに
おいて、 前記複数の傾斜加工面が隣接することによって形成され
た各稜線の中途部から前記第2加工部側に向かって形成
された面取り部を備えていることを特徴とするバーリン
グポンチ。1. A prepared hole processing portion having a polygonal pyramid-shaped first processed portion adjacent to a plurality of inclined processed surfaces and a cylindrical second processed portion continuous with the first processed portion, and the prepared hole processed portion. A burring punch having a cylindrical burring hole machining portion having a larger diameter than the second machining portion, the ridgelines being formed by adjoining the plurality of inclined machining surfaces. A burring punch provided with a chamfered portion formed from a middle portion toward the second processed portion side.
り部は前記傾斜加工面の隣接するものに対して前記稜線
を中心に対称であることを特徴とする請求項1に記載の
バーリングポンチ。2. The first machining portion is a quadrangular pyramid, and the chamfered portion is symmetrical with respect to an adjacent one of the inclined machining surfaces about the ridge line. Burring punch.
該円筒部から連続して同方向に突出すると共に、その連
続部分が最大幅となっている略三角形状の複数の凸部と
から形成されていることを特徴とするバーリング。3. A cylindrical portion protruding from a flat portion of a metal plate,
A burring which is formed by a plurality of substantially triangular projections each of which has a maximum width and which continuously projects from the cylindrical portion in the same direction.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP00937296A JP3625938B2 (en) | 1996-01-23 | 1996-01-23 | Burling punch and burring |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP00937296A JP3625938B2 (en) | 1996-01-23 | 1996-01-23 | Burling punch and burring |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH09201627A true JPH09201627A (en) | 1997-08-05 |
JP3625938B2 JP3625938B2 (en) | 2005-03-02 |
Family
ID=11718646
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP00937296A Expired - Fee Related JP3625938B2 (en) | 1996-01-23 | 1996-01-23 | Burling punch and burring |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3625938B2 (en) |
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JP2009262221A (en) * | 2008-04-30 | 2009-11-12 | Otis:Kk | Stepped hole working tool |
WO2011117979A1 (en) * | 2010-03-24 | 2011-09-29 | Ykk株式会社 | Method for forming button, and button |
CN103537541A (en) * | 2013-09-25 | 2014-01-29 | 浙江吉利控股集团有限公司 | Installing hole punching device |
CN105033034A (en) * | 2015-07-02 | 2015-11-11 | 浙江兴盛铸造有限公司 | Hardware punching die |
CN113145747A (en) * | 2021-04-14 | 2021-07-23 | 深圳数码模汽车技术有限公司 | High-precision multi-angle synchronous flanging and punching die and method |
-
1996
- 1996-01-23 JP JP00937296A patent/JP3625938B2/en not_active Expired - Fee Related
Cited By (12)
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JP2002256696A (en) * | 2001-03-02 | 2002-09-11 | Hamana Works:Kk | Floor plate material having anti-skid function, and method for producing the same |
JP2006205234A (en) * | 2005-01-31 | 2006-08-10 | Amada Co Ltd | Burring dies and burring method |
EP1710027A2 (en) * | 2005-04-07 | 2006-10-11 | Ricoh Company, Ltd. | A process for producing a metal base plate having a projected portion formed with a slit, a die and a mold structure used in the same |
EP1710027A3 (en) * | 2005-04-07 | 2008-05-07 | Ricoh Company, Ltd. | A process for producing a metal base plate having a projected portion formed with a slit, a die and a mold structure used in the same |
JP2008155216A (en) * | 2006-12-20 | 2008-07-10 | Oiles Ind Co Ltd | Punch for punching sheet metal, sheet metal punching device provided with the punch, and method therefor |
JP2009262221A (en) * | 2008-04-30 | 2009-11-12 | Otis:Kk | Stepped hole working tool |
WO2011117979A1 (en) * | 2010-03-24 | 2011-09-29 | Ykk株式会社 | Method for forming button, and button |
CN102834029A (en) * | 2010-03-24 | 2012-12-19 | Ykk株式会社 | Method for forming button, and button |
CN102834029B (en) * | 2010-03-24 | 2015-03-25 | Ykk株式会社 | Method for forming button, and button |
CN103537541A (en) * | 2013-09-25 | 2014-01-29 | 浙江吉利控股集团有限公司 | Installing hole punching device |
CN105033034A (en) * | 2015-07-02 | 2015-11-11 | 浙江兴盛铸造有限公司 | Hardware punching die |
CN113145747A (en) * | 2021-04-14 | 2021-07-23 | 深圳数码模汽车技术有限公司 | High-precision multi-angle synchronous flanging and punching die and method |
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