JPH0732064A - Method and device for working counter boring hole for flat head screw - Google Patents
Method and device for working counter boring hole for flat head screwInfo
- Publication number
- JPH0732064A JPH0732064A JP18168693A JP18168693A JPH0732064A JP H0732064 A JPH0732064 A JP H0732064A JP 18168693 A JP18168693 A JP 18168693A JP 18168693 A JP18168693 A JP 18168693A JP H0732064 A JPH0732064 A JP H0732064A
- Authority
- JP
- Japan
- Prior art keywords
- hole
- punch
- die
- cutting edge
- tapered
- 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
- 238000000034 method Methods 0.000 title claims description 5
- 238000005520 cutting process Methods 0.000 claims abstract description 15
- 235000013372 meat Nutrition 0.000 claims description 8
- 238000004080 punching Methods 0.000 claims description 6
- 238000003754 machining Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 238000003672 processing method Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Landscapes
- Punching Or Piercing (AREA)
Abstract
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 shaft of a countersunk screw is inserted in a plate member.
【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 For example, the means shown in FIG. 5 is used as a conventional means for providing a countersunk hole for a countersunk screw and a through hole in a plate material. First, as shown in FIG. 5A, the punching punch p
By punching with 1 and die d, or drilling,
The prepared hole b is made in the plate material a, and then the counterbore hole c is formed by the counterbore punch p 2 of FIG. 5B, and at the same time, the part of the prepared hole b is brought closer to correct the through hole e. (JP-A-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 the counterbore punch p 2 is press-fitted, as shown in FIG. 5B, a bulge f of meat is generated around the counterbore hole c and the outer diameter of the plate material a is apt to be enlarged. Therefore, it cannot be applied to specifications where this is not acceptable.
【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 an inconvenience, in Japanese Patent Laid-Open No. 63-36932, a prepared hole having a radial slit is formed by plastic working, and the prepared hole is coined with a taper punch to make meat. It is designed to escape into the slit.
【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。However, it is understood that forming a prepared hole having a slit and forming the prepared 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 It is an object of the present invention to provide a machining means capable of machining 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、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, a processing method for solving the above-mentioned problems is, as described in claim 1, a protrusion for pushing from the tip, a cutting edge for punching and a coining for coining. Equipped with a punch having tapered portions in sequence and a die having a die hole that cooperates with the cutting edge of the punch, the punch is pressed against a plate-shaped workpiece placed on the die, and the meat of the workpiece is removed by the protrusion. It is characterized in that a through hole is opened by a cutting blade while being pushed into a die hole, and at the same time, a coining press is performed around the through hole by a 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、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。Further, the processing apparatus used in the above-described processing method is, as described in claim 2, a punch in which a protrusion for pushing in from the tip, a cutting edge for punching, and a taper portion for coining press are sequentially provided. And a die having a die hole that cooperates with the cutting edge of the punch.
【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-described processing method and processing apparatus, the processed portion of the plate material is first drawn into the die hole by the protrusion of the punch, and then punched by the cutting edge of the punch and the die. Since a large amount of meat is punched out, the volume to be machined in the coining press portion by the taper portion that is subsequently performed is reduced, and the meat is prevented from rising or the outer diameter of the workpiece is enlarged by the coining press.
【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、円柱状の外形をもつ刃部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. In FIG. 1, 1 is a processing apparatus of the present invention, 2 is its punch, and 3 is a die. The punch 2 is provided with a hemispherical projection 4, a blade 5 having a columnar outer shape, a taper 6 and a step 7 from the tip, and the outer diameters of these are gradually increased. The die 3 is provided with a die hole 8 cooperating with the blade portion 4. 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、
刃部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, which has a thickness of 2 mm.
This is for forming a counterbore with a 4.2 mm diameter through hole in the workpiece, and the protrusion 4 is a hemisphere with a radius of 1.3 mm,
The blade portion 5 has an outer diameter of 4.2 mm and a height of 1 mm, and the tapered portion has 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) by the lowering of the punch 2, the work W of the plate material is pushed by the projecting portion 4, 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
に深くなって刃部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、
刃部５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１
２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 recess 10 becomes deeper and reaches the outside of the blade 5, and the volume of the push-out portion 11 increases as the volume of the recess 10 increases. And
The blade portion 5 starts shearing action, and the extruded portion 11 is completely cut before reaching the state shown in FIG. 3 (c). As shown in FIG.
2 is formed, and the recess 10 causes a reduction in the volume indicated by V. When the extruded portion 11 is cut, even if the concave portion 10 springs back or the through hole 12 widens,
The amount of thinning V is unchanged.
【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. 3C, the taper portion 6
When pressed by, the tapered counterbore 13 is formed, and at the same time, the meat is extruded to the outer periphery of the blade 5 to finish-form the through hole 12. At this time, the amount of swelling at the lower part of the step 7 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 size 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 have a hemispherical shape, but may have 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 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, it has the effect of causing almost no rise of meat.
【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 a similar process explanatory diagram
【図４】 同じく作用説明図FIG. 4 is an explanatory view of the same operation.
【図５】 従来技術説明図FIG. 5 is an explanatory view of a conventional technique.
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 2 Punch 3 Die 4 Projection 5 Cutting edge 6 Taper 10 Recess 11 Extrusion 12 Through hole 13 Counterbore W Work
Claims (2)
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（５）
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 punch (2) in which a protrusion (4) for pushing, a cutting blade (5) for punching and a taper (6) for coining are sequentially provided from the tip, and a cutting of the punch (2). A blade (5) and a die (3) having a die hole (8) cooperating with the blade (5), and the punch (2) is pressed against a plate-like work (W) placed on the die (3) to form a protrusion. (5)
While pushing the meat of the work (W) into the die hole (8), the through hole (12) is opened by the cutting blade (5), and at the same time, the periphery of the through hole (12) is coined by the tapered portion (6). A method for making a counterbore for a countersunk screw, which is characterized by pressing.
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 punch (2) in which a protrusion (4) for pushing, a cutting edge (5) for punching, and a taper portion (6) for coining press are sequentially provided from the tip, and the punch (2). (3) having a die hole (8) that cooperates with the cutting edge (5) of (3), and a counterbore hole machining device for a countersunk screw.
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 true JPH0732064A (en) | 1995-02-03 |
| JP2893502B2 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 (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015143611A (en) * | 2003-03-03 | 2015-08-06 | ショット アクチエンゲゼルシャフトＳｃｈｏｔｔ ＡＧ | Metal fixing bush, and method of manufacturing core of metal fixing bush |
Families Citing this family (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 |
| CN107971387B (en) * | 2017-11-24 | 2019-08-13 | 中山复盛机电有限公司 | Thick and thin material non-chip punching structure applied to punch forming lead frame |
| CN107983823B (en) * | 2017-11-24 | 2019-08-13 | 中山复盛机电有限公司 | Chip-free punching method for thick and thin area on lead frame |
-
1993
- 1993-07-22 JP JP18168693A patent/JP2893502B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015143611A (en) * | 2003-03-03 | 2015-08-06 | ショット アクチエンゲゼルシャフトＳｃｈｏｔｔ ＡＧ | Metal fixing bush, and method of manufacturing core of metal fixing bush |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2893502B2 (en) | 1999-05-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7107808B2 (en) | Shearing method for thin plate | |
| CN101674902A (en) | Member having chamfered through-hole and method for manufacturing the same | |
| JP2005103624A (en) | Punch for press die, and guide structure and chamfering method in stripper plate of punch for press die | |
| US7464575B2 (en) | Shearing method for thin plate | |
| JP2000117344A (en) | Pressing method of metallic product and progressive working method | |
| JPH0732064A (en) | Method and device for working counter boring hole for flat head screw | |
| JP5645527B2 (en) | Punch die and screw hole machining method using the punch die | |
| JPS6336932A (en) | Working method for countersunk screw hole | |
| JP2701792B2 (en) | Burrless drilling method | |
| JP2643336B2 (en) | Burring processing method and apparatus | |
| JP3282275B2 (en) | Stamping dies for thin plates | |
| JP2821990B2 (en) | Punching method for inner and outer peripheral parts | |
| JP3719576B2 (en) | Drilling method during hydroforming | |
| WO2009125786A1 (en) | Shearing method | |
| JPH10146625A (en) | Pressing method | |
| JPH07116745A (en) | Method and device for burring | |
| JP2750390B2 (en) | Washer manufacturing method | |
| JPH0957363A (en) | Precise press die | |
| JP2001353535A (en) | Method of forming through-hole | |
| JPS6272438A (en) | Plate punching equipment | |
| JPH10277663A (en) | Press equipment | |
| JP2021192929A (en) | Manufacturing method and manufacturing program | |
| JPH11156457A (en) | Method of forming tapered hole and method of manufacturing optical element | |
| JP3688978B2 (en) | Metal plate pre-processing tool and metal plate punching method | |
| JPH057946A (en) | Punching method for pressed parts |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 9 Free format text: PAYMENT UNTIL: 20080305 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 10 Free format text: PAYMENT UNTIL: 20090305 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100305 Year of fee payment: 11 |
|
| LAPS | Cancellation because of no payment of annual fees |