JP2893502B2 - Counterbore hole processing method and processing device for countersunk screws - Google Patents
Counterbore hole processing method and processing device for countersunk screwsInfo
- Publication number
- JP2893502B2 JP2893502B2 JP18168693A JP18168693A JP2893502B2 JP 2893502 B2 JP2893502 B2 JP 2893502B2 JP 18168693 A JP18168693 A JP 18168693A JP 18168693 A JP18168693 A JP 18168693A JP 2893502 B2 JP2893502 B2 JP 2893502B2
- Authority
- JP
- Japan
- Prior art keywords
- hole
- punch
- die
- counterbore
- projection
- 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.)
- Expired - Fee Related
Links
Landscapes
- Punching Or Piercing (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、板材に、皿ビスの頭部
を受けるテーパー状の座ぐり穴と、皿ビスの軸部が挿入
される貫通穴を作るための方法及び装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for forming a tapered counterbore hole for receiving a head of a countersunk screw and a through hole into which a shank of a countersunk screw is inserted.
【０００２】[0002]
【従来の技術】板材に皿ビス用の座ぐり穴と貫通穴を設
けるための従来の手段は、例えば図５に示す手段が用い
られる。まず、図５（ａ）に示すように穴あけパンチｐ
1とダイｄによる打抜き加工、又はドリル加工により、
板材ａに下穴ｂをあけ、次に図５（ｂ）の座ぐりパンチ
ｐ2で座ぐり穴ｃを成形し、同時に下穴ｂの部分を肉寄
せして貫通穴ｅが修正加工される（特開昭６２−８４８
３８）。2. Description of the Related Art As a conventional means for providing counterbore holes and through holes for countersunk screws in a plate material, for example, the means shown in FIG. 5 is used. First, as shown in FIG.
By punching or drilling with 1 and die d,
Open the pilot hole b to the plate material a, and then shaping the counterbore c in countersunk punch p 2 in FIG. 5 (b), the through hole e is corrected processed aligns meat portion of the lower hole b simultaneously (Japanese Patent Laid-Open No. 62-848)
38).
【０００３】しかし、座ぐりパンチｐ2を圧入する際
に、図５（ｂ）に示すように座ぐり穴ｃのまわりに肉の
盛上がりｆが生じたり、板材ａの外径の拡大が生じ易い
から、これが許容されない仕様には適用できない。However, when press-fitting the counterbore punch p 2, or cause swelling f meat around the counterbore c as shown in FIG. 5 (b), easily occurs expansion of the outer diameter of the plate material a Therefore, it cannot be applied to specifications where this is not permissible.
【０００４】このような不都合を回避するために、特開
昭６３−３６９３２においては、放射状のスリットをも
つ下穴を塑性加工によりあけ、この下穴をテーパーのパ
ンチでコイニングプレスをして肉を前記スリットに逃が
すようにしている。In order to avoid such inconveniences, Japanese Patent Application Laid-Open No. 63-36932 discloses that a pilot hole having a radial slit is formed by plastic working, and the pilot hole is subjected to coining press with a tapered punch to cut the meat. The slit is made to escape.
【０００５】しかしながら、スリットをもつ下穴を形成
すること、及び該下穴を平滑なテーパー穴に成形するこ
とには、かなりの困難が伴うと解される。[0005] However, it is understood that forming a pilot hole having a slit and forming the pilot hole into a smooth tapered hole involves considerable difficulty.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、座ぐり穴と
貫通穴が１工程で加工でき、板厚の変化も殆ど生じない
加工手段を得ることを課題とする。SUMMARY OF THE INVENTION An object of the present invention is to provide a processing means capable of forming a counterbore hole and a through hole in one step and hardly causing a change in plate thickness.
【０００７】[0007]
【課題を解決するための手段】本発明において、前記の
課題を解決するための加工方法は、請求項１に記載した
とおり、先端から押込み用の突部、円柱状周面と平底で
エッジを形成した打抜き用の切刃及びコイニング用のテ
ーパー部を順次設けたパンチと、該パンチの切刃と共同
するダイ穴をもつダイとを備え、ダイ上に載置した板状
のワークにパンチを押圧して、突部でワークの肉をダイ
穴内に押込みながら切刃で貫通穴をあけ、これと同時に
テーパー部で該貫通穴の周囲をコイニングプレスをする
こと、を特徴とする。According to the present invention, there is provided a machining method for solving the above-mentioned problems, as described in claim 1, in which a projection for pushing in from the tip, a cylindrical peripheral surface and a flat bottom.
A punch provided with a tapered portion for cutting and coining for punching forming the edges sequentially and a die having a die hole for cooperation with the cutting edge of the punch, the placing the plate-shaped workpiece on the die It is characterized in that a punch is pressed, a through hole is formed with a cutting blade while the meat of the work is pushed into the die hole at the projecting portion, and at the same time, a coining press is performed around the through hole at the tapered portion.
【０００８】また、前記の加工方法に用いる加工装置
は、請求項２に記載したとおりの、先端から押込み用の
突部、円柱状周面と平底でエッジを形成した打抜き用の
切刃、及びコイニングプレス用のテーパー部を順次設け
たパンチと、該パンチの切刃と共同するダイ穴をもつダ
イと、を備えることを特徴とする。[0008] The processing apparatus used in the above-mentioned processing method is, as described in claim 2, a projection for pushing in from the tip, a cutting blade for punching having an edge formed by a cylindrical peripheral surface and a flat bottom , and A punch having a tapered portion for a coining press in order and a die having a die hole cooperating with a cutting edge of the punch are provided.
【０００９】[0009]
【作用】前記の加工方法及び加工装置において、まず板
材の加工部分は、パンチの突部によってダイス穴内に引
込まれ、次にパンチの切刃とダイによって打抜かれる
が、前記の引込まれた分だけ多い量の肉が打抜かれるか
ら、引続いて行われるテーパー部によるコイニングプレ
ス部分の加工すべき容積が減少され、コイニングプレス
による肉の盛上がり又はワーク外径の拡大は防止され
る。In the above-mentioned processing method and processing apparatus, the processed portion of the plate material is first drawn into the die hole by the projection of the punch, and then punched by the cutting edge of the punch and the die. Since only a large amount of meat is punched, the volume of the coining press to be machined by the subsequent tapered portion is reduced, and the rise of meat or the increase in the outer diameter of the workpiece by the coining press is prevented.
【００１０】[0010]
【実施例】以下、図面を参照して本発明の実施例を説明
する。図１において１は本発明の加工装置で、２はその
パンチ、３はダイである。パンチ２は、先端から半球状
の突部４、円柱状周面と平底でエッジを形成した切刃
５、テーパー部６及び段部７を備え、これらの外径は順
次増大される。ダイ３は前記刃部４と共同するダイ穴８
を備えている。Ｗは加工される板材である。Embodiments of the present invention will be described below with reference to the drawings.
I do. In FIG. 1, 1 is a processing apparatus of the present invention, and 2 is
Punch 3 is a die. Punch 2 is hemispherical from the tip
Projection 4, cylindricalCutting edge with an edge formed on the peripheral surface and flat bottom
5, a tapered portion 6 and a stepped portion 7.
Next is increased. The die 3 has a die hole 8 cooperating with the blade 4.
It has. W is a plate material to be processed.
【００１１】図２は、パンチ２の詳細を示し、厚さ２mm
のワークに直径４．２mmの貫通穴をもつ座ぐり穴を成形
するためのものであり、突部４は半径１．３mmの半球、
切刃５は外径４．２mm、高さ１mm、テーパー部は高さ
１．５mm、テーパー角９０°である。FIG. 2 shows details of the punch 2 and has a thickness of 2 mm.
The work 4 is for forming a counterbore with a through hole with a diameter of 4.2 mm. The protrusion 4 has a hemisphere with a radius of 1.3 mm.
The cutting edge 5 has an outer diameter of 4.2 mm, a height of 1 mm, a tapered portion of a height of 1.5 mm, and a taper angle of 90 °.
【００１２】図３（ａ）〜（ｃ）は前記装置１による工
程を示し、パンチ２の下降により図３（ａ）に示すよう
に、板材のワークＷは、突部４で押され、中心部分に凹
部１０が形成され、該凹部１０の容積分が下面の押出し
部１１としてダイ穴８内に突出する。3 (a) to 3 (c) show the steps performed by the apparatus 1. As shown in FIG. 3 (a), when the punch 2 descends, the plate-shaped workpiece W is pushed by the projection 4 and the center thereof is moved. A concave portion 10 is formed in the portion, and the volume of the concave portion 10 projects into the die hole 8 as an extruded portion 11 on the lower surface.
【００１３】図３（ｂ）の状態になると、凹部１０は更
に深くなって切刃５の外側まで及び、凹部１０の容積の
増大に伴って押出し部１１の容積も増大する。そして、
切刃５のエッジが剪断作用を始め、図３（ｃ）に至る前
に押出し部１１は完全に切断されて、図４に示すように
貫通穴１２が形成され、凹部１０によりＶで示す容積の
減肉が生じる。押出し部１１の切断したとき、凹部１０
の部分がスプリングバックをしたり、貫通穴１２が広が
っても、減肉量Ｖは不変である。In the state shown in FIG. 3B, the concave portion 10 is further deepened and extends to the outside of the cutting blade 5, and the volume of the pushing portion 11 increases as the volume of the concave portion 10 increases. And
Edge of the cutting blade 5 starts to shearing action, pusher 11 before reaching the FIG. 3 (c) is completely disconnected, the through hole 12 is formed as shown in FIG. 4, the volume indicated by V by the recess 10 Thinning occurs. When the extruded portion 11 is cut,
Does not change, the wall thickness reduction V does not change even if the portion does spring back or the through hole 12 widens.
【００１４】そして、図３（ｃ）のようにテーパー部６
で押圧されると、テーパー状の座ぐり穴１３が成形さ
れ、同時に刃部５の外周に肉が押出されて貫通穴１２も
仕上げ成形される。このとき、段部７の下部に盛上がり
が生じてもその量は無視できる程度である。Then, as shown in FIG.
When pressed, the tapered counterbore 13 is formed, and at the same time, the meat is extruded on the outer periphery of the blade portion 5 and the through hole 12 is also finish-formed. At this time, even if a bulge occurs at the lower part of the step 7, the amount is negligible.
【００１５】なお、前記実施例において示した加工装置
の寸法、形状は一例にすぎないもので、適宜の設計変更
ができる。例えば突部４を半球形とせず、面取りした円
柱状にしてもよい。The dimensions and shape of the processing apparatus shown in the above embodiment are merely examples, and appropriate design changes can be made. For example, the protrusion 4 may not be formed in a hemispherical shape but in a chamfered cylindrical shape.
【００１６】[0016]
【発明の効果】以上のように、本発明の方法又は装置を
用いれば、パンチ１のストロークで皿ビス用の座ぐり穴
と貫通穴が形成されるから、生産性が極めて良好であ
り、その上、肉の盛上がりも殆ど生じない効果を奏す
る。As described above, when the method or the apparatus of the present invention is used, the counterbore hole and the through hole for the countersunk screw are formed by the stroke of the punch 1, so that the productivity is extremely good. In addition, there is an effect that the rise of meat hardly occurs.
【図１】 本発明の実施に使用する装置の正面図FIG. 1 is a front view of an apparatus used to carry out the present invention.
【図２】 同上装置の要部拡大図FIG. 2 is an enlarged view of a main part of the same device.
【図３】 同じく工程説明図FIG. 3 is an explanatory view of the same process.
【図４】 同じく作用説明図FIG. 4 is an explanatory diagram of the same operation.
【図５】 従来技術説明図FIG. 5 is an explanatory view of a conventional technology.
２ パンチ ３ ダイ ４ 突部 ５ 切刃 ６ テーパー部 １０ 凹部 １１ 押出し部 １２ 貫通穴 １３ 座ぐり穴 Ｗ ワーク Reference Signs List 2 Punch 3 Die 4 Projection 5 Cutting blade 6 Tapered section 10 Concave section 11 Extruded section 12 Through hole 13 Counterbore W Work
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) B21D 28/24 B21D 28/34 ──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. 6 , DB name) B21D 28/24 B21D 28/34
Claims (2)
周面と平底でエッジを形成した打抜き用の切刃（５）及
びコイニング用のテーパー部（６）を順次設けたパンチ
（２）と、 該パンチ（２）の切刃（５）と共同するダイ穴（８）を
もつダイ（３）とを備え、ダイ（３）上に載置した板状
のワーク（Ｗ）にパンチ（２）を押圧して、突部（４）
でワーク（Ｗ）の肉をダイ穴（８）内に押込みながら切
刃（５）で貫通穴（１２）をあけ、 これと同時にテーパー部（６）で該貫通穴（１２）の周
囲をコイニングプレスをすること、を特徴とする皿ビス
用座ぐり穴加工方法。1. A projection (4) for pushing in from the tip, cylindrical shape
A punch (2) provided with a cutting edge (5) for punching and a tapering portion (6) for coining in which an edge is formed with a peripheral surface and a flat bottom, and a cutting edge (5) of the punch (2). A die (3) having a die hole (8), and a punch (2) is pressed against a plate-like work (W) placed on the die (3) to form a projection ( 4 ).
The through-hole (12) is made with the cutting blade (5) while pushing the meat of the work (W) into the die hole (8), and at the same time, the periphery of the through-hole (12) is coined with the tapered portion (6). Pressing, counterbore hole processing method for countersunk screws.
周面と平底でエッジを形成した打抜き用の切刃（５）、
及びコイニングプレス用のテーパー部（６）を順次設け
たパンチ（２）と、 該パンチ（２）の切刃（５）と共同するダイ穴（８）を
もつダイ（３）と、 を備えることを特徴とする皿ビス用座ぐり穴加工装置。2. A projection (4) for pushing in from the tip, cylindrical shape
A cutting edge (5) for punching having an edge formed on the peripheral surface and the flat bottom ,
And a punch (2) provided with a tapered portion (6) for a coining press in order, and a die (3) having a die hole (8) cooperating with a cutting edge (5) of the punch (2). A counterbore hole processing device for countersunk screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18168693A JP2893502B2 (en) | 1993-07-22 | 1993-07-22 | Counterbore hole processing method and processing device for countersunk screws |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18168693A JP2893502B2 (en) | 1993-07-22 | 1993-07-22 | Counterbore hole processing method and processing device for countersunk screws |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0732064A JPH0732064A (en) | 1995-02-03 |
| JP2893502B2 true JP2893502B2 (en) | 1999-05-24 |
Family
ID=16105103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18168693A Expired - Fee Related JP2893502B2 (en) | 1993-07-22 | 1993-07-22 | Counterbore hole processing method and processing device for countersunk screws |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2893502B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005103624A (en) * | 2003-10-01 | 2005-04-21 | Punch Industry Co Ltd | Punch for press die, and guide structure and chamfering method in stripper plate of punch for press die |
| CN107971387A (en) * | 2017-11-24 | 2018-05-01 | 中山复盛机电有限公司 | Thickness material applied to punch forming lead frame is without chip die cut structural |
| CN107983823A (en) * | 2017-11-24 | 2018-05-04 | 中山复盛机电有限公司 | Thickness region without chip method for die cutting on lead frame |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20314580U1 (en) * | 2003-03-03 | 2004-08-05 | Schott Glas | Metal-glass fastening equipment lead-through for airbag or seat belt tension triggers has metal pins in a through-opening and a main body with front and rear sides and a release action |
-
1993
- 1993-07-22 JP JP18168693A patent/JP2893502B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005103624A (en) * | 2003-10-01 | 2005-04-21 | Punch Industry Co Ltd | Punch for press die, and guide structure and chamfering method in stripper plate of punch for press die |
| CN107971387A (en) * | 2017-11-24 | 2018-05-01 | 中山复盛机电有限公司 | Thickness material applied to punch forming lead frame is without chip die cut structural |
| CN107983823A (en) * | 2017-11-24 | 2018-05-04 | 中山复盛机电有限公司 | Thickness region without chip method for die cutting on lead frame |
| CN107971387B (en) * | 2017-11-24 | 2019-08-13 | 中山复盛机电有限公司 | Thickness material applied to punch forming lead frame is without clast die cut structural |
| CN107983823B (en) * | 2017-11-24 | 2019-08-13 | 中山复盛机电有限公司 | Thickness region without clast method for die cutting on lead frame |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0732064A (en) | 1995-02-03 |
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