JPH07108418B2 - Sheet metal work manufacturing method - Google Patents

Sheet metal work manufacturing method

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Publication number
JPH07108418B2
JPH07108418B2 JP11439093A JP11439093A JPH07108418B2 JP H07108418 B2 JPH07108418 B2 JP H07108418B2 JP 11439093 A JP11439093 A JP 11439093A JP 11439093 A JP11439093 A JP 11439093A JP H07108418 B2 JPH07108418 B2 JP H07108418B2
Authority
JP
Japan
Prior art keywords
work
sheet metal
pressing
pressed
cut
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 - Lifetime
Application number
JP11439093A
Other languages
Japanese (ja)
Other versions
JPH06328159A (en
Inventor
昭治 佐坂
Original Assignee
有限会社足立プレス
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 有限会社足立プレス filed Critical 有限会社足立プレス
Priority to JP11439093A priority Critical patent/JPH07108418B2/en
Publication of JPH06328159A publication Critical patent/JPH06328159A/en
Publication of JPH07108418B2 publication Critical patent/JPH07108418B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Description

【発明の詳細な説明】Detailed Description of the Invention
【0001】[0001]
【産業上の利用分野】本発明は、板金製歯車などの機械
部品、各種分野の金属プレス加工品などの板金ワークを
金属板材料から打ち抜いて製造するプレス製造方法に関
する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press manufacturing method for punching and manufacturing machine parts such as sheet metal gears and sheet metal works such as metal stamped products in various fields from metal sheet materials.
【0002】[0002]
【従来の技術】板厚が数mm前後の鉄板や銅板などの金
属板材料を所定のブランク形状に打ち抜くプレス加工法
で使用される金型は、最終的な板金ワークと同一寸法形
状の雄形金型(ポンチ)と、この雄形金型が嵌挿される
抜き孔を有する雌形金型(ダイ)の一対が使用される。
2. Description of the Related Art A die used in a press working method for punching a metal plate material such as an iron plate or a copper plate having a plate thickness of about several mm into a predetermined blank shape is a male shape having the same size and shape as a final sheet metal work. A pair of a die (punch) and a female die (die) having a hole into which the male die is inserted is used.
【0003】例えば円形の板金ワークを製造する場合、
上下一対の雄形金型と雌形金型が配置されている加工ポ
ジションに金属板材料が間欠送りされ、加工ポジション
で雄形金型が雌形金型に向けて上下動して、金属板材料
が部分的に円形に打ち抜かれて板金ワークが量産され
る。例えば図5に示される金属板材料(1)が板厚2〜
4mmの鉄板の場合、これを例えば直径25mmの円形
サイズで打ち抜いた板金ワーク(10)の切断端面には、
縦断面が湾曲形状となったアール面(m)と微細な凹凸
面である破断面(n)が現われるのが通常である。アー
ル面(m)は、破断面(n)から少し膨出して現われ、
このアール面(m)の湾曲寸法は金属板材料(1)の板
厚に比例する。
For example, when manufacturing a circular sheet metal work,
The metal plate material is intermittently fed to the processing position where a pair of upper and lower male and female molds are arranged, and the male mold moves up and down toward the female mold at the processing position to move the metal plate. The material is partially punched into a circular shape, and sheet metal work is mass-produced. For example, the metal plate material (1) shown in FIG.
In the case of a 4 mm iron plate, for example, the cut end surface of the sheet metal work (10) punched out in a circular size of 25 mm in diameter,
It is usual that a rounded surface (m) having a curved vertical section and a fracture surface (n) that is a fine uneven surface appear. The rounded surface (m) appears slightly swelling from the fracture surface (n),
The curved dimension of the rounded surface (m) is proportional to the plate thickness of the metal plate material (1).
【0004】上記のような金属板材料を上下一対の金型
で打ち抜いたときに生じる板金ワークの切断端面のアー
ル面や破断面は、板金ワークの外観を損ない、板金ワー
クの外径寸法精度を悪くする。そこで、板金ワークの切
断端面をストレートなものにして、外観や外径寸法精度
を良くする板金ワークの製造方法として、次のファイン
ブランキング法やシェービング法、半抜きプレス法が知
られている。
The rounded surface and the fracture surface of the cut end surface of the sheet metal work, which occurs when the metal sheet material as described above is punched by a pair of upper and lower dies, impairs the appearance of the sheet metal work and improves the accuracy of the outer diameter of the sheet metal work. Make it worse. Therefore, the following fine blanking method, shaving method, and half blanking method are known as a method for manufacturing a sheet metal work in which the cut end surface of the sheet metal work is made straight to improve the appearance and the accuracy of the outer diameter.
【0005】ファインブランキング法は、金属板材料の
円形に打ち抜かれる部分の外周線部分を特別な押え金型
で強固に挾持固定しておいて、押え金型内で上下動する
雄形金型で金属板材料を円形に打ち抜く方法である。こ
の方法によると、金属板材料の板厚が数mm前後と小さ
い場合には、打ち抜かれた板金ワークの切断端面にアー
ル面と破断面がほとんど発生せず、切断端面がほぼスト
レートになる。
The fine blanking method is a male die that moves up and down in the press die with a special press die firmly holding and fixing the outer peripheral line of the circular punched part of the metal plate material. Is a method of punching a metal plate material into a circle. According to this method, when the plate thickness of the metal plate material is as small as several mm, the cut end surface of the punched sheet metal work hardly has a rounded surface and a fracture surface, and the cut end surface becomes almost straight.
【0006】また、シェービング法は、金属板材料から
板金ワークを予め大き目のサイズで打ち抜いておいて、
打ち抜かれた板金ワークの切断端面のアール面と破断面
を切削により除去し、切断端面をストレートに仕上げる
方法である。
In the shaving method, a sheet metal work is punched out from a metal plate material in advance in a large size,
This is a method in which the rounded surface and the fracture surface of the cut end surface of the punched sheet metal work are removed by cutting, and the cut end surface is finished straight.
【0007】半抜きプレス法は、例えば図6(a)〜
(c)に示すように行われる。まず、図6(a)に示す
ように、金属板材料(1)をその板厚の半分程度のスト
ロークで半抜きプレスする。次に、図6(b)に示すよ
うに、半抜きプレスされた半抜きワーク(11)を金属板
材料(1)の中に押し戻しておいて、図6(c)に示す
ように、半抜きワーク(11)を半抜きプレス時と反対方
向にプレスして金属板材料(1)から板金ワーク(12)
を打ち抜く。
The half-pressing method is, for example, as shown in FIG.
It is performed as shown in (c). First, as shown in FIG. 6A, the metal plate material (1) is half-pressed with a stroke of about half the plate thickness. Next, as shown in FIG. 6B, the half-pressed work (11) that has been half-pressed is pushed back into the metal plate material (1), and as shown in FIG. The blank work (11) is pressed in the opposite direction to the half blank press, and the sheet metal work (12) is cut from the metal plate material (1).
Punch out.
【0008】[0008]
【発明が解決しようとする課題】板金ワークをファイン
ブランキング法でプレス加工すると、板金ワークの切断
端面がストレートになって後加工の必要性が無くなり、
精度と品質の均一な板金ワークを量産性よく製造でき
る。ところが、金属板材料から所定形状の板金ワークを
打ち抜くプレス力に通常のプレス機の3倍以上の強力な
ものが必要で、金型とその駆動系の設備全体が大掛りと
なり、また、金型に強固で高価なものが必要となって、
全体の設備費や板金ワークの製造コストが高くなる問題
があった。
When the sheet metal work is pressed by the fine blanking method, the cut end surface of the sheet metal work becomes straight, and the need for post-processing is eliminated.
It is possible to manufacture sheet metal workpieces with uniform precision and quality with good mass productivity. However, the press force for punching a sheet metal work of a predetermined shape from a metal plate material needs to be three times or more stronger than that of a normal press machine, which requires a large amount of equipment for the die and its drive system. Requires strong and expensive items,
There is a problem that the total equipment cost and the manufacturing cost of the sheet metal work become high.
【0009】また、金属板材料から打ち抜かれた板金ワ
ークの切断端面をシェービング法でストレートに仕上げ
る方法は、板金ワークの切断端面のアール面を切削した
ときに飛散する切削屑が板金ワークの製品や切削工具な
どに付着して、板金ワークの製品を傷付ける問題があっ
た。また、シェービング毎に切削屑を除去するようにし
ているが、この切削屑除去処理が面倒であり、短時間で
完全に除去することが困難で、板金ワーク製造の量産性
を悪くしていた。
Further, in a method of finishing a cut end surface of a sheet metal work punched out of a metal plate material to be straight by a shaving method, cutting scraps scattered when the rounded surface of the cut end surface of the sheet metal work is cut into a product of the sheet metal work or There was a problem that it adheres to a cutting tool or the like and damages the sheet metal work product. Further, although the cutting scraps are removed for each shaving, this cutting scraps removing process is troublesome, and it is difficult to completely remove the cutting scraps, which deteriorates the mass productivity of sheet metal work production.
【0010】さらに、図6の半抜きプレス法は、板金ワ
ークを低コストで量産性良く製造することができる、製
造された板金ワークの切断端面に破断面がほとんど無
い、といった利点を備える。しかし、金属板材料から半
抜きプレスされた半抜きワークの裏面エッジ部分にでき
るアール面が、最終プレスで打ち抜かれた板金ワークに
残り、結果的に板金ワークの切断端面からアール面を除
去してストレートにするためには、最終プレス後にシェ
ービング加工するしか無いのが現状である。
Further, the half-pressing method shown in FIG. 6 has the advantages that a sheet metal work can be produced at low cost with good mass productivity, and that the cut end face of the produced sheet metal work has almost no fracture surface. However, the rounded surface formed on the back edge part of the half-pressed work half-pressed from the metal plate material remains in the sheet metal work punched by the final press, and as a result, the rounded surface is removed from the cut end face of the sheet metal work. The current situation is to shave after the final press to make it straight.
【0011】本発明の目的は、金属板材料をプレスする
だけで切断端面のストレートな板金ワークを、量産性良
く低コストで製造できるプレス製造方法を提供すること
にある。
An object of the present invention is to provide a press manufacturing method capable of manufacturing a straight sheet metal work having a cut end surface with good mass productivity and at low cost simply by pressing a metal plate material.
【0012】[0012]
【課題を解決するための手段】本発明は、金属板材料か
ら所定サイズの板金ワークを打ち抜く製造方法であっ
て、最終的な板金ワークのサイズより0.2〜0.5mm
幅だけ一回り大きなサイズで金属板材料を、その板厚の
約50〜70%のストロークで半抜きプレスし、半抜き
プレスされた半抜きワークを平押しプレスする工程と、
平押しプレスされた半抜きワークを、そのサイズより一
回り小さな最終的な板金ワークのサイズで、前記半抜き
プレスと同方向に打ち抜いて板金ワークを得る工程を含
むことを特徴とする。
The present invention is a manufacturing method for punching a sheet metal work of a predetermined size from a metal sheet material, which is 0.2 to 0.5 mm from the final size of the sheet metal work.
A step of half-pressing a metal plate material having a size slightly larger by the width with a stroke of about 50 to 70% of the plate thickness, and flat-pressing the half-pressed half-pressed work,
It is characterized in that it includes a step of obtaining a sheet metal work by punching a half-press work pressed by flat pressing with a final sheet metal work size slightly smaller than the size in the same direction as the half-press press.
【0013】[0013]
【作用】金属板材料を最終的な板金ワークのサイズより
0.2〜0.5mm幅だけ一回り大きなサイズで、金属板
材料の板厚の約50〜70%のストロークで半抜きプレ
スして平押しプレスすると、平押しプレスされた半抜き
ワークの切断端面のエッジ部分には、平押しプレスの作
用でアール面がほとんど無くなる。また、半抜きプレス
と平押しプレスされた半抜きワークを、そのサイズより
一回り小さな最終的な板金ワークのサイズで、半抜きプ
レスと同方向に打ち抜いて板金ワークを得ると、板金ワ
ークの打ち抜き時に板金ワークの裏面エッジ部分に発生
する引っ張り応力が、半抜きワークの0.2〜0.5mm
幅の周縁部の変形で吸収される。その結果、打ち抜かれ
た板金ワークの切断端面にアール面がほとんど発生せ
ず、板金ワークの切断端面がアール面と破断面のほとん
ど無いストレートなものとなる。
[Function] The metal plate material is half-pressed at a stroke of about 50 to 70% of the plate thickness of the metal plate material with a size slightly larger than the size of the final sheet metal work by a width of 0.2 to 0.5 mm. When the flat pressing is performed, the rounded surface is almost eliminated by the action of the flat pressing at the edge portion of the cut end surface of the half-pressed work pressed by the flat pressing. In addition, when a half-pressing work and a flat-pressing half-pressed work are punched in the same direction as the half-pressing press to obtain a sheet-metal work with a final sheet-metal work size slightly smaller than that size, the sheet-metal work is punched. The tensile stress that sometimes occurs at the back edge of the sheet metal work is 0.2-0.5 mm
It is absorbed by the deformation of the peripheral portion of the width. As a result, the rounded surface is hardly generated on the cut end surface of the punched sheet metal work, and the cut end surface of the sheet metal work is a straight surface with almost no round surface and broken surface.
【0014】[0014]
【実施例】以下、本発明方法の具体的実施例を図1乃至
図4を参照して説明する。
EXAMPLES Specific examples of the method of the present invention will be described below with reference to FIGS.
【0015】図1乃至図3は、金属板材料(1)を部分
的に2回に分けてプレスして、所定形状の板金ワーク
(3)を製造する本発明方法の一実施例を説明するため
のものである。例えば、金属板材料(1)は板厚が2m
mの長尺な鉄板であり、これから直径25mmの円形の
板金ワーク(3)が次の2工程で打ち抜かれる。
FIGS. 1 to 3 explain one embodiment of the method of the present invention for producing a sheet metal work (3) having a predetermined shape by partially pressing a metal sheet material (1) twice. It is for. For example, the metal plate material (1) has a plate thickness of 2 m.
It is a long iron plate of m and a circular sheet metal work (3) with a diameter of 25 mm is punched out in the following two steps.
【0016】金属板材料(1)を水平に保持して長手方
向に間欠送りし、金属板材料(1)の円形の被プレス部
分を半抜きポジションP1と打ち抜きポジションP2に順
に送る。半抜きポジションP1で金属板材料(1)は、最
終的に打ち抜き成形される板金ワーク(3)の直径25
mmより0.2〜0.5mm幅だけ一回り大きな、つま
り、25mmに0.2〜0.5mmの2倍を加えた25.
4〜26.0mmの直径の円形サイズで半抜きプレスさ
れ、平押しプレスされる。そして、打ち抜きポジション
P2で金属板材料(1)の半抜き平押しプレスされた半抜
きワーク(2)が、そのサイズより一回り小さい最終的
なサイズの直径25mmで打ち抜きプレスされる。
The metal plate material (1) is held horizontally and intermittently fed in the longitudinal direction, and the circular pressed portion of the metal plate material (1) is sequentially fed to the half-punch position P1 and the punching position P2. At the half-punch position P1, the metal plate material (1) has a diameter 25 of the sheet metal work (3) finally punched and formed.
It is one size larger by 0.2 to 0.5 mm than mm, that is, 25 mm is doubled from 0.2 to 0.5 mm.
It is half-pressed and flat-pressed with a circular size having a diameter of 4 to 26.0 mm. Then, at the punching position P2, the half punched flat press work of the metal plate material (1) is performed, and the half punched work (2) is punched and pressed with a final size of 25 mm, which is slightly smaller than the size.
【0017】半抜きポジションP1には、例えば図2に
示すような雄形金型(4)と雌形金型(5)の一組が上下
に配置される。雄形金型(4)のサイズ(直径)は、最
終的に打ち抜き成形される板金ワーク(3)の直径25
mmより0.2〜0.5mm幅だけ一回り大きく、雌形金
型(5)は雄形金型(4)が嵌挿される底付抜き孔(6)
を有する。この上下一組の雄形金型(4)と雌形金型
(5)で金属板材料(1)が、図2(a)及び(b)に示
す過程で金属板材料(1)の板厚の50〜70%のスト
ロークで半抜きプレスされ、図2(b)の状態で半抜き
プレスされた半抜きワーク(2)が平押しプレスされ
る。平押しプレス後、上下金型(4)(5)の離型が行わ
れて、図2(c)に示す直径25.4〜26.0mmの半
抜きワーク(2)が次の打ち抜きポジションP2に送られ
る。
At the half-punch position P1, for example, a set of a male mold (4) and a female mold (5) as shown in FIG. The size (diameter) of the male die (4) is the diameter 25 of the sheet metal work (3) to be finally punched.
It is one size larger than the mm by a width of 0.2 to 0.5 mm, and the female mold (5) has a bottomed hole (6) into which the male mold (4) is inserted.
Have. The metal plate material (1) is made up of the pair of upper and lower male molds (4) and female molds (5), and the plate of the metal plate material (1) is processed in the process shown in FIGS. 2 (a) and (b). The blanking work (2), which is half-pressed with a stroke of 50 to 70% of the thickness and half-pressed in the state of FIG. 2B, is flat-pressed. After the flat pressing, the upper and lower molds (4) and (5) are released from each other, and the half-cut work (2) having a diameter of 25.4 to 26.0 mm shown in FIG. 2 (c) is moved to the next punching position P2. Sent to.
【0018】打ち抜きポジションP2には、最終的な板
金ワーク(3)を打ち抜くための図3に示すような雄形
金型(7)と雌形金型(8)の一組が上下に配置される。
雄形金型(7)のサイズ(直径)は、最終的な板金ワー
ク(3)の直径25mmであり、雌形金型(8)は雄形金
型(4)が嵌挿される直径25mmの抜き孔(9)を有す
る。打ち抜きポジションP2に金属板材料(1)の半抜き
平押しプレスされた半抜きワーク(2)が搬入される
と、図3(a)及び(b)に示すように雄形金型(7)
が下降して、一回り大きな半抜きワーク(2)の0.2〜
0.5mm幅wの周縁部(2a)を残して半抜きワーク
(2)を打ち抜き、図3(c)に示すような板金ワーク
(3)が製造される。
At the punching position P2, a set of a male die (7) and a female die (8) for punching the final sheet metal work (3) as shown in FIG. 3 is arranged vertically. It
The size (diameter) of the male die (7) is 25 mm in diameter of the final sheet metal work (3), and the female die (8) is 25 mm in diameter into which the male die (4) is inserted. It has a hole (9). When the half punched flat-pressed half punched work (2) of the metal plate material (1) is carried into the punching position P2, the male die (7) is moved as shown in FIGS. 3 (a) and 3 (b).
Is lowered, and the size of the half-cut workpiece (2) is larger than 0.2.
The half-blanked work (2) is punched out, leaving the peripheral portion (2a) of 0.5 mm width w, to manufacture a sheet metal work (3) as shown in FIG. 3 (c).
【0019】図3に示すように、金属板材料(1)の半
抜き平押しプレスされた半抜きワーク(2)を、その0.
2〜0.5mm幅wの周縁部(2a)を残して打ち抜く
と、打ち抜かれた板金ワーク(3)の切断端面はアール
面、破断面の無いストレートなものとなる。すなわち、
図3(b)の状態で半抜きワーク(2)を雄形金型(7)
でプレスして板金ワーク(3)を打ち抜くと、板金ワー
ク(3)の裏面エッジ部分に加わる引っ張り応力が半抜
きワーク(2)の0.2〜0.5mm幅wの周縁部(2
a)の変形で吸収されて、板金ワーク(3)の裏面エッ
ジ部分にアール面が発生しない。また、周縁部(2a)
の存在で打ち抜かれた板金ワーク(3)の切断端面に破
断面が発生せず、発生しても微小で問題無いことが実験
により認知された。
As shown in FIG. 3, the half blank work (2) pressed by half blank pressing of the metal plate material (1) was used to
When the punching is performed while leaving the peripheral edge portion (2a) having a width of 2 to 0.5 mm, the cut end surface of the punched sheet metal work (3) is a straight surface with no rounded surface or broken surface. That is,
In the state shown in Fig. 3 (b), the half-cut work (2) is inserted into the male die (7).
When the sheet metal work (3) is punched by pressing with, the tensile stress applied to the back surface edge part of the sheet metal work (3) is 0.2-0.5 mm width w peripheral edge (2) of the half-draw work (2).
It is absorbed by the deformation of a), and no rounded surface is generated on the back surface edge portion of the sheet metal work (3). In addition, the peripheral portion (2a)
It was recognized by the experiment that the fracture surface does not occur on the cut end face of the sheet metal work (3) punched in the presence of the crack, and even if it occurs, there is no problem.
【0020】図2のプレス工程で金属板材料(1)を半
抜きプレスしただけでは、半抜きワーク(2)の裏面エ
ッジ部分にアール面が生じ、これを放置しておくと、図
3のプレス工程で打ち抜かれた板金ワーク(3)にアー
ル面が残る可能性が高い。しかし、図2(b)に示すよ
うに、半抜きプレスされた半抜きワーク(2)を平押し
プレスすると、半抜きワーク(2)のアール面がほとん
ど消え、残っても小さなアール面となって、図3のプレ
ス工程で打ち抜かれた板金ワーク(3)にアール面が生
じことは無い。
If only half-pressing the metal plate material (1) in the pressing step of FIG. 2 causes a rounded surface at the back edge portion of the half-pressing work (2), if this is left unattended, The rounded surface is likely to remain on the sheet metal work (3) punched out in the pressing process. However, as shown in Fig. 2 (b), when the half-pressed work (2) that has been half-pressed is flat-pressed, the rounded surface of the half-pressed work (2) almost disappears and remains a small rounded surface. As a result, the rounded surface does not occur on the sheet metal work (3) punched out in the pressing process of FIG.
【0021】図2のプレス工程で金属板材料(1)を、
その板厚の50%より小さいストロークで半抜きプレス
すると、半抜きプレスされた半抜きワーク(2)の金属
板材料(1)からの突出長が短くなり過ぎて、図3
(b)の半抜きワーク(2)の打ち抜きプレス時に金属
板材料(1)に残る半抜きワーク周縁部(2a)の上記
応力吸収効果が少なくなり、板金ワーク(3)にアール
面が生じ易くなる。また、図2のプレス工程で金属板材
料(1)を、その板厚の70%より大きいストロークで
半抜きプレスすると、半抜きプレスされた半抜きワーク
(2)と金属板材料(1)の結合長が短くなり過ぎて、図
3(b)の半抜きワーク(2)の打ち抜きプレス時に金
属板材料(1)から半抜きワーク周縁部(2a)が切削
屑のようになって離脱し、板金ワーク(3)を傷付ける
などの弊害を及ぼす。したがって、図2のプレス工程で
金属板材料(1)は、その板厚の50〜70%のストロ
ークで半抜きプレスすることが望ましい。
In the pressing step of FIG. 2, the metal plate material (1) is
When half-pressing is performed with a stroke smaller than 50% of the plate thickness, the protruding length of the half-pressed work (2) pressed from the metal plate material (1) becomes too short, and as shown in FIG.
The stress absorbing effect of the peripheral part (2a) of the half-cut work remaining in the metal plate material (1) during the punching press of the half-cut work (2) of (b) is reduced, and the rounded surface is likely to be formed on the sheet metal work (3). Become. In addition, when the metal plate material (1) is half-pressed with a stroke larger than 70% of the plate thickness in the pressing step of FIG. 2, the half-pressed work (2) and the metal plate material (1) are pressed. The bonding length becomes too short and the peripheral edge part (2a) of the half-cut work is separated from the metal plate material (1) like cutting chips during the punching press of the half-cut work (2) of FIG. 3 (b), It causes harmful effects such as damage to the sheet metal work (3). Therefore, in the pressing step of FIG. 2, it is desirable that the metal plate material (1) is half-pressed with a stroke of 50 to 70% of the plate thickness.
【0022】また、図2の半抜きプレスサイズと図3の
打ち抜きプレスサイズの差を0.2〜0.5mm幅wの範
囲に設定して、図3(a)の半抜きワーク(2)を、そ
の0.2〜0.5mm幅wの周縁部(2a)を残して打ち
抜くようにすることが重要である。つまり、半抜きワー
ク(2)の打ち抜きから残される周縁部(2a)の幅w
を0.2mmより小さくすると、半抜きワーク(2)を雄
形金型(7)で打ち抜くときに0.2mm幅未満の薄い周
縁部(2a)が金属板材料(1)から削られ、切削屑と
なって周辺に飛散する心配が出てくる。逆に、半抜きワ
ーク(2)の打ち抜きから残される周縁部(2a)の幅
wを0.5mmより大きく設定すると、周縁部(2a)
の肉厚が大きくなり過ぎて、上記応力吸収効果が悪くな
り、打ち抜かれた板金ワーク(3)にアール面が発生し
易くなる。したがって、半抜きワーク(2)の打ち抜き
から残される周縁部(2a)の幅wは0.2〜0.5mm
の範囲に設定し、望ましくは0.25〜0.35mmに設
定する
Further, the difference between the half-pressing press size of FIG. 2 and the punching press size of FIG. 3 is set within a range of 0.2 to 0.5 mm width w, and the half-cutting work (2) of FIG. It is important to leave the peripheral edge portion (2a) having a width w of 0.2 to 0.5 mm. That is, the width w of the peripheral edge portion (2a) left after punching the half-cut workpiece (2)
Is less than 0.2 mm, when punching the half-cut work (2) with the male die (7), the thin peripheral part (2a) of less than 0.2 mm width is cut from the metal plate material (1), There is a concern that it will be scrapped and scattered around. On the contrary, if the width w of the peripheral edge portion (2a) left after punching the half-cut work (2) is set to be larger than 0.5 mm, the peripheral edge portion (2a)
Is too thick, the stress absorbing effect is deteriorated, and the punched sheet metal work (3) is likely to have a rounded surface. Therefore, the width w of the peripheral edge portion (2a) left after punching the half-cut workpiece (2) is 0.2 to 0.5 mm.
Set to the range of, and preferably set to 0.25 to 0.35 mm
【0023】図2の半抜きプレス時の半抜きワーク
(2)の裏面エッジ部分には、金属板材料(1)の板厚に
比例した大きさのアール面が生じ、このアール面は2m
mの板厚の場合に小さくて平押しプレスでほとんど無く
なる。しかし、金属板材料(1)の板厚が4mm、5m
mと大きくなると、半抜きプレスされた半抜きワーク
(2)の裏面エッジ部分に生じるアール面が大きくなっ
て、1回の平押しプレスで消えないことがある。このよ
うな場合は、上記要領で半抜きプレスと平押しプレスを
複数回行って、最後に打ち抜きプレスを行えばよく、そ
の具体例を図4を参照して説明する。
A rounded surface having a size proportional to the plate thickness of the metal plate material (1) is formed on the back surface edge portion of the half-cut work (2) in the half-pressing of FIG. 2, and this rounded surface is 2 m.
When the plate thickness is m, it is small and almost disappears in the flat pressing. However, the thickness of the metal plate material (1) is 4 mm, 5 m
When it is increased to m, the rounded surface generated at the back surface edge portion of the half-pressed work (2) that has been half-pressed is increased, and it may not be erased by one flat pressing. In such a case, the half-pressing press and the flat-pressing press may be performed a plurality of times as described above, and the punching press may be finally performed. A specific example thereof will be described with reference to FIG.
【0024】図4の金属板材料(1)は板厚が4mmの
鉄板で、これから直径25mmの円形の板金ワーク
(3)を打ち抜く場合、2回の半抜きプレスとその各半
抜きプレス毎に平押しプレスをする。1回目の半抜きプ
レスは、図4(a)に示すように、最終的な板金ワーク
(3)の直径25mmより0.2〜0.5mm幅wを基準
にした二回り大きな直径例えば26mmの円形サイズで
半抜きプレスし、平押しプレスする。この1回目のプレ
スで半抜きされた半抜きワーク(2)の裏面エッジ部分
には大き目のアール面が生じる。
The metal plate material (1) shown in FIG. 4 is an iron plate having a plate thickness of 4 mm, and when punching a circular sheet metal work (3) having a diameter of 25 mm, two half-pressing presses and two half-pressing presses are used. Press flat press. As shown in FIG. 4 (a), the first half blanking press has a diameter twice larger than the diameter 25 mm of the final sheet metal work (3) based on the width w of 0.2 to 0.5 mm, for example, 26 mm. Circular size, half blanking press, flat press. A large rounded surface is formed on the back surface edge portion of the half-cut work (2) half-cut by the first press.
【0025】次に、図4(b)に示すように、半抜き平
押しプレスされた直径26mmの半抜きワーク(2)
を、その外周から0.2〜0.5mm幅w、例えば0.2
5mm幅の周縁部(2a)を残して2回目の半抜きプレ
スをし、平押しプレスを行う。この2回目のプレスで直
径が25.5mmの半抜きワーク(2')が半抜きされ
る。半抜きワーク(2')の裏面エッジ部分に生じるア
ール面は、先の半抜きワーク(2)の残された0.25m
m幅wの周縁部(2a)の応力吸収効果で小さくなる。
Next, as shown in FIG. 4 (b), a half blank work (2) having a diameter of 26 mm which has been half blank pressed and pressed.
From its outer periphery to a width w of 0.2 to 0.5 mm, for example 0.2
A second half blanking press is performed leaving a peripheral portion (2a) having a width of 5 mm, and a flat pressing is performed. With this second press, the half-cut work (2 ') having a diameter of 25.5 mm is half-cut. The rounded surface generated at the back edge part of the half blank work (2 ') is 0.25m left on the previous half blank work (2).
It becomes smaller due to the stress absorption effect of the peripheral portion (2a) of the m width w.
【0026】最後に半抜きワーク(2')を、その外周
から0.25mm幅の周縁部(2b)を残した25mm
の直径の円形サイズで打ち抜き、板金ワーク(3)を製
造する。この板金ワーク(3)の切断端面には、2回目
のプレスで残された0.25mm幅wの半抜きワーク
(2')の周縁部(2b)の応力吸収効果で無くなり、
切断端面がストレートに仕上がる。
Finally, the half-cut work (2 ') is 25 mm with the peripheral part (2b) having a width of 0.25 mm left from the outer circumference.
A sheet metal work (3) is manufactured by punching in a circular size with a diameter of. The cut end surface of the sheet metal work (3) disappears due to the stress absorption effect of the peripheral edge portion (2b) of the half-cut work (2 ′) having a width of 0.25 mm w left by the second press,
The cut end surface is finished straight.
【0027】[0027]
【発明の効果】本発明によれば、金属板材料を部分的に
半抜きプレスし、平押しプレスした半抜きワークを、そ
のサイズより0.2〜0.5mm幅だけ一回り小さな最終
的な板金ワークのサイズで、半抜きプレスと同方向に打
ち抜くと、打ち抜かれる板金ワークの裏面エッジ部分に
発生する引っ張り応力が、半抜きワークの0.2〜0.5
mm幅の周縁部の変形で吸収されて、打ち抜かれた板金
ワークの切断端面がアール面の無いストレートなものに
仕上がり、切断端面をストレートにするための特別な後
工程が不必要な量産性に優れた、かつ、通常のプレス機
程度の設備で実施できる設備費、製造コストの安い板金
ワーク製造方法が提供できる。
EFFECTS OF THE INVENTION According to the present invention, a metal sheet material is partially half-pressed and flat-pressed to form a half-cut work which is slightly smaller than its size by a width of 0.2 to 0.5 mm. When punching the sheet metal work in the same direction as the half-press, the tensile stress generated at the back edge of the sheet-work to be punched is 0.2-0.5 of the half-work.
Absorbed by the deformation of the peripheral part of mm width, the punched sheet metal workpiece has a cut end surface that is straight and has no rounded surface, and does not require a special post-process to make the cut end surface straight. It is possible to provide a sheet metal work manufacturing method which is excellent and can be carried out with equipment such as a normal press machine and has a low equipment cost and a low manufacturing cost.
【図面の簡単な説明】[Brief description of drawings]
【図1】本発明方法の実施装置例を示す金属板材料の断
面図。
FIG. 1 is a sectional view of a metal plate material showing an example of an apparatus for carrying out the method of the present invention.
【図2】図1の金属板材料の部分拡大断面図で、(a)
は半抜きプレス直前の断面図、(b)は半抜きプレスと
平押しプレス時の断面図、(c)は半抜き平押しプレス
後の断面図。
2 is a partially enlarged cross-sectional view of the metal plate material of FIG. 1, (a)
Is a cross-sectional view immediately before half-pressing press, (b) is a cross-sectional view at the time of half-pressing and flat pressing, and (c) is a cross-sectional view after half-pressing flat pressing.
【図3】図1の金属板材料の部分拡大断面図で、(a)
は打ち抜きプレス直前の断面図、(b)は打ち抜き時の
断面図、(c)は打ち抜き後の断面図。
3 is a partially enlarged cross-sectional view of the metal plate material of FIG. 1, (a)
Is a sectional view immediately before the punching press, (b) is a sectional view at the time of punching, and (c) is a sectional view after punching.
【図4】本発明方法でプレスされる金属板材料の部分断
面図で、(a)は1回目の半抜きプレス時の断面図、
(b)は2回目の半抜きプレス時の断面図、(c)は打
ち抜きプレス時の断面図。
FIG. 4 is a partial cross-sectional view of a metal plate material pressed by the method of the present invention, (a) is a cross-sectional view at the time of the first half blanking press,
(B) is a cross-sectional view of the second half-pressing press, and (c) is a cross-sectional view of the punching press.
【図5】金属板材料から一般的方法で打ち抜かれた板金
ワークの部分断面図。
FIG. 5 is a partial cross-sectional view of a sheet metal work punched from a metal plate material by a general method.
【図6】金属板材料から板金ワークを打ち抜く従来方法
を説明するための金属板材料の部分断面図で、(a)は
半抜きプレス時の断面図、(b)は半抜きワークの戻し
時の断面図、(c)は打ち抜きプレス時の断面図。
6A and 6B are partial cross-sectional views of a metal plate material for explaining a conventional method of punching a sheet metal work from a metal plate material, in which FIG. 6A is a cross-sectional view at the time of half-pressing and FIG. And (c) is a sectional view at the time of punching press.
【符号の説明】[Explanation of symbols]
1 金属板材料 2 半抜きワーク 2' 半抜きワーク 3 板金ワーク 4 雄形金型 5 雌形金型 7 雄形金型 8 雌形金型 1 Metal plate material 2 Half blank work 2'Half blank work 3 Sheet metal work 4 Male mold 5 Female mold 7 Male mold 8 Female mold

Claims (1)

    【特許請求の範囲】[Claims]
  1. 【請求項1】 雄形金型と雌形金型で金属板材料を部分
    的に打ち抜いて所定形状、サイズの板金ワークを製造す
    るプレス方法であって、 最終的な板金ワークのサイズより0.2〜0.5mmだけ
    一回り大きなサイズで金属板材料を、その板厚の約50
    〜70%のストロークで半抜きプレスし、半抜きプレス
    された半抜きワークを平押しプレスする工程と、 平押しプレスされた半抜きワークを、そのサイズより一
    回り小さな最終的な板金ワークのサイズで、前記半抜き
    プレスと同方向に打ち抜いて板金ワークを得る工程とを
    含むことを特徴とする板金ワーク製造方法。
    1. A pressing method for producing a sheet metal work having a predetermined shape and size by partially punching a metal sheet material with a male die and a female die, wherein A metal plate material with a size larger by 2 to 0.5 mm, with a thickness of about 50
    The process of half-pressing with a stroke of ~ 70%, pressing the half-pressed half-pressed work flat-pressing, and the half-pressed half-pressed work one size smaller than the final size of the sheet metal work. And a step of obtaining a sheet metal work by punching in the same direction as the half-pressing press.
JP11439093A 1993-05-17 1993-05-17 Sheet metal work manufacturing method Expired - Lifetime JPH07108418B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11439093A JPH07108418B2 (en) 1993-05-17 1993-05-17 Sheet metal work manufacturing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11439093A JPH07108418B2 (en) 1993-05-17 1993-05-17 Sheet metal work manufacturing method

Publications (2)

Publication Number Publication Date
JPH06328159A JPH06328159A (en) 1994-11-29
JPH07108418B2 true JPH07108418B2 (en) 1995-11-22

Family

ID=14636483

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11439093A Expired - Lifetime JPH07108418B2 (en) 1993-05-17 1993-05-17 Sheet metal work manufacturing method

Country Status (1)

Country Link
JP (1) JPH07108418B2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002079325A (en) * 2000-09-07 2002-03-19 Asahi Optical Co Ltd Manufacturing method of small part
JP2002096119A (en) * 2000-09-14 2002-04-02 Asahi Optical Co Ltd Manufacturing method for small part
JP4719630B2 (en) * 2006-06-16 2011-07-06 アピックヤマダ株式会社 Method for manufacturing transfer substrate
JP2009101403A (en) * 2007-10-25 2009-05-14 Aisin Seiki Co Ltd Blanking method
JP6507644B2 (en) * 2015-01-05 2019-05-08 セイコーエプソン株式会社 Liquid jet head and method of manufacturing the same

Also Published As

Publication number Publication date
JPH06328159A (en) 1994-11-29

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