【発明の詳細な説明】本発明は仕上は抜き方法及びその装置の改良に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in a finishing punching method and apparatus.
従来の仕上げ抜き方法は、刃先に丸みをつけ及び又は面
取9をしたパンチと、この・ζンチに対し所定のクリア
ランスを有するダイスとにより構成される装置によって
、板状の製品に所要の穴あけを行ない、又は、その逆に
ダイスの刃先に丸みをつけ及び又は面取りをし、このダ
イスとこれに対し所定のクリヤランスを有するパンチと
によって、板材から必要な形状寸法の製品を切り取るこ
とにより、これら製品の内周面又は外周面を破断面や二
次せん断面の少ない加工面とすることを目的とするもの
でるる。このような従来の仕上げ抜き方法は、製品の切
口面を板面に対して直角に加工腰破断面や2次せん断面
等のきれつ発生を防止せんとするものであって、同時に
切口面にテーパを形成することは困難であった。In the conventional finishing punching method, a device consisting of a punch with a rounded and/or chamfered cutting edge and a die with a predetermined clearance for this punch is used to punch the required holes in a plate-shaped product. Or, conversely, by rounding and/or chamfering the cutting edge of the die, and using this die and a punch with a predetermined clearance to cut out a product of the required shape and size from the plate material, these can be made. The purpose is to make the inner or outer peripheral surface of a product into a machined surface with few fractured surfaces or secondary shear surfaces. This conventional finish punching method aims to prevent the occurrence of cracks such as waist fracture surfaces and secondary shear surfaces by machining the cut surface of the product at right angles to the plate surface, and at the same time It was difficult to form a taper.
本発明は以上のような点に鑑みなされたもので、パンチ
又はダイスの少なくども一方の刃先に丸み及び又は面取
りを設け、更にその丸み及び又は面取りを有する部分の
近傍にテーパ部を形成することにより、板材から打抜か
れた後の製品の内周面又は外周面を上記テーパ面によっ
て塑性変形きせてテーパ状にするとともに平滑な仕上げ
而を得ることを、一工程で可能とする仕上げ抜き方法を
提供する。又、この方法に使用する装置として、刃先に
丸み及び又(は面取りを設けたパンチにテーパ部を形成
し、このパンチとダイスとを一対とした装置、及び、ダ
イス刃先に丸み及び又は面取りを設け、その近傍にテー
パ部を形成し、このダイスとパンチとを一対とした装置
を提供するものである○以下図示実施ρりに基づいて本発明を説明する。The present invention has been made in view of the above points, and includes providing a rounded and/or chamfered edge on at least one of the cutting edges of a punch or die, and further forming a tapered portion near the rounded and/or chamfered portion. The present invention has developed a finishing punching method that makes it possible to plastically deform the inner or outer peripheral surface of a product punched from a sheet material using the tapered surface to make it tapered and to obtain a smooth finish in one step. provide. In addition, devices used in this method include a device in which a punch with a rounded and/or chamfered cutting edge is formed with a tapered part, and a pair of this punch and a die, and a device with a rounded and/or chamfered cutting edge. The present invention will be described below based on the illustrated embodiment.
第1図は板金製品に穴あけを行なう場合を示し、(1)
i”j:パンチ、(2)はダイス、(3)は材料の板金
であり、(41f”l:この板金を押える押え部材であ
る。パンチ(1)の先端部(5)は而取りがされ、その
先端部(5)上部は板金製品に設けられる穴と略同−の
外周を有する柱状部(6)となっている。従来の仕上げ
抜きにおいては、このように面取りされた刃先(7)と
柱状部(6)とを備えたパンチ(1)とダイス(2)と
により板金製品に穴あけを行ない、き裂の発生を防止す
るものであった。これに対し、本実施例に寂いては、上
記柱状部(6)の上方にテーパ部(8)、さらにそのテ
ーパ部(8)の上部には上記柱状部(6)よりも大径の
柱状部(9)が形成されている。他方、ダイス(2)ハ
従来と同一の構成に係るものが使用される。Figure 1 shows the case of drilling holes in sheet metal products, (1)
i"j: Punch, (2) is a die, (3) is a sheet metal material, (41f"l: a holding member that holds down this sheet metal. The tip (5) of the punch (1) is The upper part of the tip (5) is a columnar part (6) having an outer circumference approximately the same as the hole provided in the sheet metal product.In conventional finish punching, the chamfered cutting edge (7) ) and a columnar part (6) and a die (2) are used to make a hole in a sheet metal product to prevent the occurrence of cracks. A tapered portion (8) is formed above the columnar portion (6), and a columnar portion (9) having a larger diameter than the columnar portion (6) is formed above the tapered portion (8). On the other hand, the die (2) has the same structure as the conventional one.
以上の構成に係るパンチ及びダイスにより板金製品の穴
あけを行なう場合について説明する。第1図に示す如く
、ダイス(2)と押え部材(4)により板金(3)をク
ランプした後、パンチ(1)を下降させる。A case will be described in which a hole is made in a sheet metal product using the punch and die having the above configuration. As shown in FIG. 1, after the sheet metal (3) is clamped by the die (2) and the holding member (4), the punch (1) is lowered.
そして、パンチ(1)の刃先(7)が板金(3)の表面
に達し、更に下降して板金(3)を下方に押圧すると(
第1図右側参照)、パンチ(1)の刃先(7)からダイ
ス(2)の刃先(10)へかけてせん断面が走りせん断
される。更にパンチ(1)が下降していくに従って、板
金(3)の破断面は上記パンチ(1)の面取りした先端
部(5)により擦りとられ材料(11)とともに排出さ
れる。なおもパンチ(1)が下降を続け、上記テーパ部
の先端(12)が板金(3)の抄部に達する。この時、
先端(I2)の外周と板金(3)に穿設された穴(13
)の内周は略同−であるが、更に降下してテーパ部(8
)が穴(13)内に圧入されると第1図左側参照)、テ
ーパ部(8)の外径はしだいに大きくなるため、上記穴
(13)の内周すなわち板金製品の内面は塑性変形され
テーパ面(8)が転写される。Then, when the cutting edge (7) of the punch (1) reaches the surface of the sheet metal (3) and further descends to press the sheet metal (3) downward (
(See the right side of FIG. 1), a shearing surface runs from the cutting edge (7) of the punch (1) to the cutting edge (10) of the die (2) and is sheared. As the punch (1) further descends, the fractured surface of the sheet metal (3) is scraped off by the chamfered tip (5) of the punch (1) and discharged together with the material (11). The punch (1) continues to descend, and the tip (12) of the tapered portion reaches the cut portion of the sheet metal (3). At this time,
The hole (13) drilled in the outer periphery of the tip (I2) and the sheet metal (3)
) have approximately the same inner periphery, but descends further to form a tapered part (8
) is press-fitted into the hole (13) (see left side of Figure 1), the outer diameter of the tapered part (8) gradually increases, so the inner periphery of the hole (13), that is, the inner surface of the sheet metal product, undergoes plastic deformation. The tapered surface (8) is then transferred.
ここで加工は終了し、その後パンチ(2)は上昇しても
との位置に戻り、仕上げ抜き加工の一工程を終了する。The machining is completed here, and the punch (2) then ascends and returns to its original position, completing one step of the finish punching process.
以上のようにプレス(1)が上方からダイス(2)内へ
下降する一動作により、板金製品の内面をテーパ状に形
成することができるとともに、従来の仕上げ抜きに比し
て、破断面や2次せん断面が著しく少ない仕上げ面を得
ることができる。As described above, by the single movement of the press (1) descending from above into the die (2), the inner surface of the sheet metal product can be formed into a tapered shape, and compared to conventional finishing punching, the inner surface of the sheet metal product can be formed into a tapered shape. A finished surface with significantly fewer secondary shear surfaces can be obtained.
第2図は他の笑施例ケ示す。上記実施例と同様に、(1
)はパンチ、(2)はダイス、(3)は板金、(4)は
押え部材であり、(l→は打抜かれた製品を取り出すノ
ックアウトパンチである。ダイス(2)は刃先04)の
内周に面取りα5)がされ、その面取りα5)の下方に
は円筒状の孔(16)が形成されている。更に、その孔
α6)の下部には、−ト万に同かうに従い口径が小さく
なるようにテーパ(17)が形成され、そして、そのテ
ーパ部(17)の下方に設けられた円孔(18)内に、
ノックアウトパンチ(1Φ)が嵌合されている。FIG. 2 shows another embodiment. Similar to the above example, (1
) is a punch, (2) is a die, (3) is a sheet metal, (4) is a holding member, and (l→ is a knockout punch for taking out a punched product. The die (2) is a cutting edge 04). A chamfer α5) is formed on the circumference, and a cylindrical hole (16) is formed below the chamfer α5). Further, a taper (17) is formed at the lower part of the hole α6) so that the diameter becomes smaller as the diameter increases, and a circular hole (18) is provided below the tapered portion (17). ) within
A knockout punch (1Φ) is fitted.
上記ダイス(2)と押え部材(4)とにより板金(3)
をクランプした後、従来と同様の構成に係るパンチ(1
)によって板金(8)を打抜いて製品(19)を得る。The die (2) and the holding member (4) form a sheet metal (3).
After clamping, a punch (1
) to obtain a product (19) from the sheet metal (8).
この工程において、製品(僧はパンチ(1)によって打
抜かれた後、円筒孔(16)内を押し下げられ、テーパ
部(17)に達する。その後、パンチ(1)により史に
押圧され先細のテーパ部(17)内に圧入され、その結
果、製品(19)の外周面は塑性変形を受けてテーパ状
に形成される。このようにして、パンチ(1)の−動作
により、打抜いた與品(匍の外周面をテーパ状に形成す
るとともに、破断面や2次せん断面の少ない仕上は而を
得ることができる。In this process, the product is punched by the punch (1) and then pushed down inside the cylindrical hole (16) to reach the tapered part (17). As a result, the outer peripheral surface of the product (19) undergoes plastic deformation and is formed into a tapered shape.In this way, the punch (1) - action causes the punched end to (By forming the outer circumferential surface of the samurai into a tapered shape, a finish with few fractured surfaces or secondary shear surfaces can be obtained.
なお、上記面取り(51,’Hの角は8〜15°、テー
パ部(81、(17)の傾斜は0〜20°程度が好まし
い。又、刃先部分を面取りではなく、丸みをつけた場合
であっても同様の効果を得ることができる。更に、バッ
チ(1)及びダイス(2)の刃先を所要の輪郭形状に形
成することにより、種々の形状の製品を得ることができ
るのは負うまでもない。In addition, the angle of the chamfer (51, 'H) is preferably 8 to 15 degrees, and the slope of the tapered part (81, (17) is preferably about 0 to 20 degrees.Also, when the cutting edge part is rounded instead of chamfered) Furthermore, by forming the cutting edges of the batch (1) and die (2) into the desired contour shape, products of various shapes can be obtained. Not even.
以上述べた如く、本発明によれば、破断面や2欠せん断
面のない仕上げ面を得ると同時に、その仕上は而にテー
パを形成することができる。As described above, according to the present invention, it is possible to obtain a finished surface without fractured surfaces or two-cut surfaces, and at the same time, the finished surface can be tapered.
第1図は本発明の一実施例を示し、その右側は板材の打
抜きの初期、左側は打抜き後の状態を示す断面図、第2
図は他の実施例を示す断面図である。(1)・・パンチ (2)・・ダイス(5)
、 (15)・・面取り (81、(171・
・テーパ部第1図第2図FIG. 1 shows an embodiment of the present invention; the right side is a sectional view showing the initial stage of punching of the plate material, the left side is a sectional view showing the state after punching, and the second
The figure is a sectional view showing another embodiment. (1) Punch (2) Dice (5)
, (15)...Chamfer (81, (171・
・Tapered part Fig. 1 Fig. 2
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4945283AJPS59174233A (en) | 1983-03-24 | 1983-03-24 | Finish punching method and device |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4945283AJPS59174233A (en) | 1983-03-24 | 1983-03-24 | Finish punching method and device |
| Publication Number | Publication Date |
|---|---|
| JPS59174233Atrue JPS59174233A (en) | 1984-10-02 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4945283APendingJPS59174233A (en) | 1983-03-24 | 1983-03-24 | Finish punching method and device |
| Country | Link |
|---|---|
| JP (1) | JPS59174233A (en) |
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|---|---|---|---|---|
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| JPH0810865A (en)* | 1994-06-22 | 1996-01-16 | Unai Kinzoku Kogyo Kk | Device for finishing circumferential face of press article and method therefor |
| WO1996009904A1 (en)* | 1994-09-29 | 1996-04-04 | Nitto Kohki Co., Ltd. | Boring method for forming tapering through hole in work by using press, and boring tool therefor |
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| JP2012512027A (en)* | 2008-12-16 | 2012-05-31 | ロバート ボッシュ ジーエムビーエイチ | Forming the transverse element of the push belt |
| EP2532452A1 (en)* | 2011-06-10 | 2012-12-12 | TRUMPF Werkzeugmaschinen GmbH + Co. KG | Method and tool for punching and straightening sheet metal |
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| JPH01309738A (en)* | 1988-06-07 | 1989-12-14 | Delta Kogyo Kk | Punching method to pipe |
| JPH0810865A (en)* | 1994-06-22 | 1996-01-16 | Unai Kinzoku Kogyo Kk | Device for finishing circumferential face of press article and method therefor |
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