JPS5952007B2 - Precision punching method for mirror plate - Google Patents
Precision punching method for mirror plateInfo
- Publication number
- JPS5952007B2 JPS5952007B2 JP5395581A JP5395581A JPS5952007B2 JP S5952007 B2 JPS5952007 B2 JP S5952007B2 JP 5395581 A JP5395581 A JP 5395581A JP 5395581 A JP5395581 A JP 5395581A JP S5952007 B2 JPS5952007 B2 JP S5952007B2
- Authority
- JP
- Japan
- Prior art keywords
- plate
- sheet
- punch
- die
- blank
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
- B21D28/16—Shoulder or burr prevention, e.g. fine-blanking
Description
【発明の詳細な説明】 産業上の利用分野 本発明は鏡面板の精密打抜き方法に関するものである。[Detailed description of the invention] Industrial applications The present invention relates to a precision punching method for a mirror plate.
従来例の構成とその問題点
従来の精密打抜き方法は、第１図に示すようにポンチ１
の外側に位置する板押え板２に下向きの力Ｆ、を与えて
板押え板２とダイス３で素板４を加圧挟持し、かつポン
チ１に下向きの力Ｆ。Structure of the conventional example and its problems The conventional precision punching method uses a punch 1 as shown in Fig. 1.
A downward force F is applied to the plate holding plate 2 located on the outside of the blank plate 2 and the die 3 pressurize the blank plate 4, and a downward force F is applied to the punch 1.
を与えると共に前記ダイス３側の逆押えポンチ５に上向
きの力Ｆ。を与えてポンチ１と逆押えポンチ５とで素板
４を加圧しながらせん断し、所定形状（たとえば円形）
の打抜き部（鏡面板）を得るものである。この打抜き方
法はせん断変形部の材料を圧縮応力状態に保つて亀裂を
発生させずにせん断分離できる。しかしながらこの方法
は前述のように打抜き部（すなわち商品）も逆押えポン
チ５で加圧されるため、その打抜き部の表面に傷が入り
易く、特に打抜き部の表面が鏡面程度に加工されたもの
の場合には非常に不良率が高いのが現状である。また流
体圧を利用した打抜き工法（特公昭４８−２３５８３号
）があるが、これは、穴を穿つことに主目的があり、打
抜かれて生じた打抜き部（商品）の表面に傷がつかない
ように配慮したものではない。したがつて冒頭に述べた
従来例と同様の欠点が生じる。発明の目的
本発明は上記従来の欠点を解消する鏡面板の精密打抜き
方法を提供することを目的とする。and an upward force F to the reverse presser punch 5 on the die 3 side. The blank sheet 4 is sheared while being pressurized by the punch 1 and the reverse presser punch 5 to form a predetermined shape (for example, circular).
A punched part (mirror plate) is obtained. This punching method maintains the material in the shear-deformed portion under compressive stress, allowing it to be shear-separated without generating cracks. However, in this method, as mentioned above, the punched part (that is, the product) is also pressurized by the counter press punch 5, so the surface of the punched part is easily damaged, especially when the surface of the punched part is processed to a mirror-like finish. The current situation is that the defective rate is extremely high in some cases. There is also a punching method that uses fluid pressure (Special Publication No. 48-23583), but the main purpose of this is to punch holes, and the surface of the punched part (product) is not damaged. It is not something that has been taken into consideration. Therefore, the same drawbacks as the conventional example mentioned at the beginning occur. OBJECTS OF THE INVENTION It is an object of the present invention to provide a precision punching method for a mirror plate that eliminates the above-mentioned conventional drawbacks.
発明の構成上記目的を達成するため、本発明の鏡面板の
精密打抜き方法は、適所に貫通穴を有するダイス３上に
表面保護シート８を載置し、該シート８上に鏡面７がシ
ート８に当接するようにして素板６を’載置し、適所に
貫通穴を有する板押え板２を素板６に押し付けてこの板
押え板２とダイス３とで挟持し、ダイス３の貫通穴に昇
降自在に挿入した逆押えポンチ５の底面１２とダイス３
の貫通穴内側面と表面保護シート８との間の空間内に液
または空気を注入して液圧層または空圧層９を形成し、
逆押えポンチ５の上向きの加圧力と板押え板２の貫通穴
に昇降自在に挿入されたポンチ１の下向きの加圧力とで
素板６およびシート８を挟持しつつポンチ１の下向きの
大加圧力で素板６およびシート８を逆押えポンチ５側に
打抜くものである。Structure of the Invention In order to achieve the above object, the precision punching method for a mirror plate of the present invention involves placing a surface protection sheet 8 on a die 3 having through holes at appropriate locations, and forming a mirror surface 7 on the sheet 8. The blank plate 6 is placed so as to be in contact with the blank plate 6, and the plate holding plate 2 having through holes in the appropriate places is pressed against the blank plate 6 and held between the plate holding plate 2 and the die 3, and the through holes of the die 3 are The bottom surface 12 of the reverse presser punch 5 and the die 3 are inserted into the
Inject liquid or air into the space between the inner surface of the through hole and the surface protection sheet 8 to form a hydraulic layer or pneumatic layer 9,
The upward pressing force of the back presser punch 5 and the downward pressing force of the punch 1, which is inserted into the through hole of the plate holding plate 2 so as to be able to move up and down, apply a large downward force to the punch 1 while holding the blank plate 6 and the sheet 8. The blank plate 6 and the sheet 8 are punched out toward the back press punch 5 side using pressure.
かかる方法によれば、ポンチ１により打抜かれようとす
る打抜き部（商品）の鏡面がシート８を介して液圧層ま
たは空圧層により支持されているので、その鏡面に打痕
傷が付かないものである。実施例と作用以下、本発明の
一実施例を第２図に基づいて説明する。According to this method, the mirror surface of the punched part (product) to be punched by the punch 1 is supported by the hydraulic layer or the pneumatic layer via the sheet 8, so that no dents or scratches are left on the mirror surface. It is something. Embodiment and Function An embodiment of the present invention will be described below with reference to FIG.
すなわち適所に貫通穴を有するダイス３上に表面保護シ
ート８を載置し、該シート８上に鏡面７がシート８に当
接するようにして素板６を載置し、適所に貫通穴を有す
る板押え板２を素板６に押し付けて（Ｆ１）この板押え
板２とダイス３とで挟持し、ダイス３の貫通穴に昇降自
在に挿入した逆押えポンチ５の底面１２とダイス３の貫
通穴内側面と表面保護シート８との間の空間内に液また
は空気を注入して液圧層または空圧層を形成し、逆押え
ポンチ５の上向きの加圧力Ｆ３と板押え板２の貫通穴に
昇降自在に挿入されたポンチ１の下向きの加圧力Ｆ２と
で素板６およびシート８を挟持しつつポンチ１の下向き
の大加圧力で素板６およびシート８を逆押えポンチ５側
に打抜くものである。上記方法によれば、特に打抜きに
よる返りが鏡面７側に出ないので後処理が容易となる効
果を有する。That is, a surface protection sheet 8 is placed on the die 3 that has through holes at appropriate places, and a blank plate 6 is placed on the sheet 8 so that the mirror surface 7 is in contact with the sheet 8, and the sheet 6 has through holes at appropriate places. The plate holding plate 2 is pressed against the blank plate 6 (F1), and the plate holding plate 2 and the die 3 are sandwiched, and the die 3 and the bottom face 12 of the reverse press punch 5 inserted into the through hole of the die 3 so as to be able to rise and fall freely are penetrated. A liquid or air is injected into the space between the inner surface of the hole and the surface protection sheet 8 to form a hydraulic layer or a pneumatic layer, and the upward pressing force F3 of the back presser punch 5 and the through hole of the presser plate 2 are The blank plate 6 and sheet 8 are held between the blank plate 6 and the sheet 8 by the downward pressurizing force F2 of the punch 1, which is inserted so as to be able to rise and fall freely, and the blank plate 6 and the sheet 8 are driven toward the reverse pressing punch 5 side by the large downward pressurizing force of the punch 1. It is something to remove. According to the above-mentioned method, there is an effect that post-processing is facilitated, especially since burrs caused by punching do not appear on the mirror surface 7 side.
発明の効果
以上述べたごとく本発明によれば、ポンチ１により打抜
かれようとする打抜き部（商品）の鏡面がシート８を介
して液圧層または空圧層により支゛持されているので、
その鏡面に打痕傷が付かないものである。Effects of the Invention As described above, according to the present invention, the mirror surface of the punched part (product) to be punched by the punch 1 is supported by the hydraulic layer or the pneumatic layer via the sheet 8.
There will be no dents or scratches on the mirror surface.
したがつて不良率を従来の打抜き方法に比べて大幅に小
さくできるものであつて、光学部品などのように高度な
反射率を要求される鏡面板の打抜き方法として最適であ
る。Therefore, the defect rate can be significantly reduced compared to conventional punching methods, and it is most suitable as a method for punching mirror-finished plates that require high reflectance, such as optical parts.
第１図は従来の打抜き装置の縦断面図、第２図は本発明
の一実施例を示す縦断面図である。
１・・・・・・ポンチ、２・・・・・・板押え板、３・
・・・・・ダイス、５・・・・・・逆押えポンチ、６・
・・・・・素板、７・・・・・・鏡面、８・・・・・・
表面保護シート、９・・・・・・液圧層または空圧層。FIG. 1 is a longitudinal sectional view of a conventional punching device, and FIG. 2 is a longitudinal sectional view showing an embodiment of the present invention. 1... Punch, 2... Holder plate, 3.
...Dice, 5...Reverse presser punch, 6.
...Bare plate, 7...Mirror surface, 8...
Surface protection sheet, 9...hydraulic layer or pneumatic layer.
Claims (1)
８を載置し、該シート８上に鏡面７がシート８に当接す
るようにして素板６を載置し、適所に貫通穴を有する板
押え板２を素板６に押し付けてこの板押え板２とダイス
３とで挟持し、ダイス３の貫通穴に昇降自在に挿入した
逆押えポンチ５の底面１２とダイス３の貫通穴内側面と
表面保護シート８との間の空間内に液または空気を注入
して液圧層または空圧層９を形成し、逆押えポンチ５の
上向きの加圧力と板押え板２の貫通穴に昇降自在に挿入
されたポンチ１の下向きの加圧力とで素板６およびシー
ト８を挟持しつつポンチ１の下向きの大加圧力で素板６
およびシート８を逆押えポンチ５側に打抜くことを特徴
とする鏡面板の精密打抜き方法。1 Place the surface protection sheet 8 on the die 3 that has through holes in the appropriate places, place the blank plate 6 on the sheet 8 so that the mirror surface 7 is in contact with the sheet 8, and place the surface protection sheet 8 on the die 3 that has through holes in the appropriate places. The plate holding plate 2 is pressed against the blank plate 6 and held between the plate holding plate 2 and the die 3, and the bottom surface 12 of the counter press punch 5 inserted into the through hole of the die 3 so as to be able to rise and fall freely, and the inner surface of the through hole of the die 3. A liquid or air is injected into the space between the surface protection sheet 8 to form a hydraulic layer or a pneumatic layer 9, which can be freely raised and lowered by the upward pressing force of the back presser punch 5 and the through hole of the presser plate 2. The blank plate 6 and the sheet 8 are held between the blank plate 6 and the sheet 8 by the downward pressurizing force of the punch 1 inserted into the blank plate 6, and the blank plate 6 is
and a precision punching method for a mirror plate, characterized in that the sheet 8 is punched on the side of the back press punch 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5395581A JPS5952007B2 (en) | 1981-04-09 | 1981-04-09 | Precision punching method for mirror plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5395581A JPS5952007B2 (en) | 1981-04-09 | 1981-04-09 | Precision punching method for mirror plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57168734A JPS57168734A (en) | 1982-10-18 |
| JPS5952007B2 true JPS5952007B2 (en) | 1984-12-17 |
Family
ID=12957126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5395581A Expired JPS5952007B2 (en) | 1981-04-09 | 1981-04-09 | Precision punching method for mirror plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5952007B2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6163328U (en) * | 1984-09-28 | 1986-04-30 | ||
| JPS61149483A (en) * | 1984-12-22 | 1986-07-08 | Iwata Denko Kk | Blank material for forming metallic product |
| DE4331488C2 (en) * | 1993-09-16 | 1997-10-16 | Bayer Ag | Process for punching plastic sheets |
| JP4646458B2 (en) * | 2001-07-26 | 2011-03-09 | パナソニック株式会社 | Apparatus and method for punching fine holes |
| JP4860224B2 (en) * | 2005-09-30 | 2012-01-25 | 本田技研工業株式会社 | Assembly structure of power transmission mechanism |
| WO2011065562A1 (en) | 2009-11-30 | 2011-06-03 | 川崎重工業株式会社 | Transmission device for two-wheeled motor vehicle |
| DE102015106859B4 (en) * | 2015-05-04 | 2018-06-14 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Method for shearing high-strength materials and cutting tool arrangement |
-
1981
- 1981-04-09 JP JP5395581A patent/JPS5952007B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57168734A (en) | 1982-10-18 |
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