JPH035243B2 - - Google Patents
Info
- Publication number
- JPH035243B2 JPH035243B2 JP58108551A JP10855183A JPH035243B2 JP H035243 B2 JPH035243 B2 JP H035243B2 JP 58108551 A JP58108551 A JP 58108551A JP 10855183 A JP10855183 A JP 10855183A JP H035243 B2 JPH035243 B2 JP H035243B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- divided
- plate material
- die
- pressing means
- 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
Links
- 239000000463 material Substances 0.000 claims description 19
- 239000012530 fluid Substances 0.000 claims description 9
- 238000005452 bending Methods 0.000 description 16
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 2
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
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
- B21D5/0209—Tools therefor
- B21D5/0218—Length adjustment of the punch
-
- 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
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/16—Control arrangements for fluid-driven presses
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Description
【発明の詳細な説明】
本発明はプレスブレーキに関わり、更に詳細に
は板材の折曲げ線の全長にわたつて均一な押圧力
で折曲げることのできるプレスブレーキに関わる
ものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a press brake, and more particularly to a press brake that can bend a plate with a uniform pressing force over the entire length of the bending line.
初めに本発明のなされた背景について説明す
る。 First, the background of the present invention will be explained.
第１図に示したプレスブレーキ１は、固定型と
しての下型３が機台５（下部エプロンと称するこ
ともある）の上部にダイホルダ７を介して左右に
長くとりつけてあり、機台５の左右両側において
上方に立設した側板９，９に案内されて、流体圧
シリンダ１１，１１に駆動されて昇降する上部フ
レーム１３（上部エプロン、ラムと呼ぶこともあ
る）の下面には、パンチホルダ１５を介して可動
型としての上型１７が下型３に対向して設けてあ
る。 In the press brake 1 shown in FIG. 1, a lower mold 3 as a fixed mold is attached to the upper part of a machine stand 5 (sometimes called a lower apron) via a die holder 7, and the press brake 1 is a fixed type. A punch holder is mounted on the lower surface of the upper frame 13 (sometimes referred to as an upper apron or ram), which is guided by side plates 9, 9 that stand upright on both left and right sides and is driven by hydraulic cylinders 11, 11 to move up and down. An upper mold 17 as a movable mold is provided opposite to the lower mold 3 via a movable mold 15.
下型３の上に板材１９を位置決めして、流体圧
シリンダ１１を駆動して上型１７を下型３に接近
せしめて係合させると、下型３と上型１７との協
働により、第２図に示したように板材１９が折曲
げられる。 When the plate material 19 is positioned on the lower mold 3 and the hydraulic cylinder 11 is driven to cause the upper mold 17 to approach and engage the lower mold 3, the cooperation between the lower mold 3 and the upper mold 17 will cause The plate material 19 is bent as shown in FIG.
しかし上部フレーム１３はその長手方向両端付
近を駆動されるから、上下型の長手方向の中央に
置かれた板材１９の加圧反力によつて折曲げ加工
終期には、第１図に破線で示したように、上型１
７は上凸に反り、下型５は下凸に反る現象があら
われて、折曲げられた板材１９は、第２図に示し
たように、いわゆる「中だれ」と呼ばれる舟形を
呈するものである。 However, since the upper frame 13 is driven near its longitudinal ends, the pressure reaction force of the plate material 19 placed at the longitudinal center of the upper and lower molds causes the upper frame 13 to be bent at the end of the bending process, as indicated by the broken line in FIG. As shown, upper mold 1
7 is warped in an upward convex manner, and the lower die 5 is warped in a downward convex manner, and the bent plate material 19 exhibits a boat-shape called a "chudare" as shown in FIG. be.
すなわち折曲げ線方向の両端付近での板材１９
の上端縁の距離ａ及びｃよりも、中央付近の距離
ｂが大きくなり、折曲げられた板材１９の両面間
の角度はｂの部分の方がａ及びｃの部分より大き
くなつてしまうのである。 In other words, the plate material 19 near both ends in the bending line direction
The distance b near the center is larger than the distances a and c at the upper edges, and the angle between both sides of the bent plate 19 is larger at part b than at parts a and c. .
上記のような「中だれ」をおこした折曲げ製品
では不合格となるので、従来はパンチホルダ１５
と上型１７との間に楔などを打ち込んで、予め想
定できる下型３の下凸の湾曲に一致する下凸の湾
曲を上型１７に与える対策がとられていた。 Since folded products with the above-mentioned "sag" will be rejected, conventionally the punch holder 15
Measures have been taken to give the upper die 17 a downward convex curvature that matches the downward convex curvature of the lower die 3 that can be assumed in advance by driving a wedge or the like between the upper die 17 and the lower die 3.
しかし上記した対策は、例えば上型１７をその
長手方向に複数に分割したいわゆる分割型２１ご
とに楔を打ち込んで下凸状の湾曲を構成し、数回
の試し曲げを重ねて修正するなど繁雑で能率の悪
い作業であつたのである。 However, the above-mentioned countermeasures are complicated, such as driving a wedge into each so-called divided mold 21 in which the upper mold 17 is divided into a plurality of parts in the longitudinal direction to form a downwardly convex curve, and repeating trial bending several times to correct the problem. This resulted in inefficient work.
上記のごとき問題を解決すべく、各分割型２１
を均等に押圧するように、第３図、第４図に示さ
れるように分割型２１と上部エプロン１３との間
に、例えばゴムチユーブ等からなる流体圧室２３
を設けることができる。 In order to solve the above problems, each split type 21
As shown in FIGS. 3 and 4, a fluid pressure chamber 23 made of, for example, a rubber tube is installed between the split mold 21 and the upper apron 13 so as to press the parts evenly.
can be provided.
第３図・第４図に例示した説明図では可動型と
しての上型１７がその長手方向に複数の分割型２
１に分割してあつて、パンチホルダ１５の中で分
割型２１の上側に、各分割型２１を均等に押圧す
べくゴムチユーブ等からなる流体圧式の押圧手段
２５が設けてある。 In the explanatory diagrams illustrated in FIGS. 3 and 4, an upper mold 17 as a movable mold has a plurality of divided molds 2 in its longitudinal direction.
A hydraulic pressing means 25 made of a rubber tube or the like is provided above the divided molds 21 in the punch holder 15 in order to press each divided mold 21 evenly.
すなわち第３図・第４図に示したものは、すべ
ての分割型２１に対して例えば共通の流体圧室２
３を設けて同じ受圧面積を持つ分割型２１がプラ
ンジヤのように同じ下向きの押圧力を伝達するよ
うになつている例である。 That is, in the case shown in FIGS. 3 and 4, for example, a common fluid pressure chamber 2 is provided for all the divided molds 21.
This is an example in which the divided molds 21 having the same pressure receiving area transmit the same downward pressing force like plungers.
この装置は上型１７と下型３との全長に等しい
長さの板材１９を折曲げる時には分割型２１は破
線で示したように下凸に湾曲して有効であるが、
上記した上型１７と下型３の全長に等しい長さの
板材１９を加工する場合はまれで、一般にはこれ
より短い板材１９であるのが普通である。 This device is effective when bending a plate material 19 with a length equal to the total length of the upper die 17 and the lower die 3, as the split die 21 is curved downwardly as shown by the broken line.
It is rare to process a plate material 19 whose length is equal to the total length of the upper die 17 and lower die 3, and generally the plate material 19 is shorter than this.
例えば、分割型２１の長さがl1、板材１９の曲
げ幅が（nl1＋l1／ａ）である場合、板材１９の一端
に対応する１つの分割型２１によつて板材１９が
押圧される長さはl1／ａである。したがつて板材１
９の一端部が他の部分より強力に押圧されること
となり、板材１９の全幅に亘つて均等に押圧する
ことができず、折曲げ精度の向上が困難になる。 For example, if the length of the split die 21 is l 1 and the bending width of the plate 19 is (nl 1 + l 1 /a), the plate 19 is pressed by one split die 21 corresponding to one end of the plate 19. The length is l 1 /a. Therefore, one end of the plate 19 is pressed more strongly than the other parts, and the entire width of the plate 19 cannot be pressed evenly, making it difficult to improve bending accuracy.
そこで、本発明は、板材１９の端部に対応する
分割型２１の押圧力を調節して、板材１９の全幅
に亘つて均等に押圧できるようにしたものであ
る。 Therefore, in the present invention, the pressing force of the split die 21 corresponding to the end of the plate material 19 is adjusted so that the pressure can be applied evenly over the entire width of the plate material 19.
すなわち分割型２１は折曲げ線方向に同一の長
さを持ち、パンチホルダ１７中の第３図に示した
流体圧室２３を長手方向に少なくとも２つに分割
して、その中にダイヤフラムのような例えばゴム
チユーブなどのように蓄圧機能を備えた２つの長
い袋からなる押圧手段２５を設け、すべての分割
型２１を押圧手段２５で下向きに押圧するように
構成した。 That is, the split die 21 has the same length in the direction of the bending line, and divides the fluid pressure chamber 23 shown in FIG. For example, a pressing means 25 consisting of two long bags having a pressure accumulating function such as a rubber tube is provided so that all the divided molds 21 are pressed downward by the pressing means 25.
さらに説明の都合上、分割型２１と押圧手段２
５とは、同じ受圧面積のブロツク２７を介して接
しているものとして説明する。 Furthermore, for convenience of explanation, the split mold 21 and the pressing means 2
5 and 5 are in contact with each other through a block 27 having the same pressure receiving area.
今、折曲げ加工を行なう板材１９が、第５図に
示すように、
2l1＋l2（l1は分割型２１の長さ）の長さであつ
て
l2＝１／２l1
であつたとすると、l2の部分に接する分割型２１
の押圧手段２５はl1の部分に接する分割型２１の
押圧手段２５の半分の流体圧を内蔵させれば、板
材１９は全長にわたつて均一押圧力を受けて折曲
げられることになる。 Now, suppose that the plate material 19 to be bent has a length of 2l 1 + l 2 (l 1 is the length of the split mold 21) and l 2 = 1/2l 1 , as shown in Fig. 5. Then, the split mold 21 touching the l 2 part
If the pressing means 25 has a built-in fluid pressure half as much as that of the pressing means 25 of the split die 21 that contacts the l 1 portion, the plate material 19 will be bent under a uniform pressing force over its entire length.
第６図に示したのは本発明の実施例装置で、最
左端の分割型２１だけの押圧手段２５が他の分割
型２１とは独立して設けてあり、押圧手段２５に
導かれる圧油の圧力は何れも調整可能である。 FIG. 6 shows an apparatus according to an embodiment of the present invention, in which the pressing means 25 of only the leftmost divided mold 21 is provided independently from the other divided molds 21, and the pressurized oil is guided to the pressing means 25. Both pressures are adjustable.
今、任意の長さの板材１９ａを分割型２１の
個々の長さl1に対して、（6l1＋３／４l1）の長さの折
曲げ長さがあるとすると、３／４l1の半端な部分を
左端の分割型２１の下に位置させ、左端の独立し
た押圧手段２５には右端の押圧手段２５に導いた
圧油の圧力をP1とした場合に、左端の押圧手段
２５に与える圧油の圧力P2を
P2＝３／４P1（Kg／cm2）
に設定する。 Now, if we assume that the plate material 19a of any length has a bending length of (6l 1 + 3/4l 1 ) with respect to the individual length l 1 of the split die 21, then the bending length is 3/4l 1 . The odd part is located under the leftmost split mold 21, and when the pressure of the pressure oil led to the rightmost pressing means 25 is P1 , the leftmost independent pressing means 25 has a pressure of P1. The pressure P 2 of the pressure oil to be applied is set to P 2 = 3/4P 1 (Kg/cm 2 ).
同様に板材１９ｂは、（3l1＋１／２l1）の長さであ
るから
P2＝１／２P1
に調整設定して折曲げ作業を行なえば、何れの場
合も板材１９の全長にわたつて均一な折曲げ圧が
作用するのである。 Similarly, since the plate material 19b has a length of (3l 1 + 1/2l 1 ), if the bending operation is performed with the adjustment setting set to P 2 = 1/2P 1 , the entire length of the plate material 19 will be extended in either case. Uniform bending pressure is applied.
以上のごとき実施例の説明より理解されるよう
に、本発明によれば、複数に分割した分割型２１
の複数の群に対応して流体圧式の押圧手段２５を
それぞれ設けて、押圧手段２５の流体圧を調節可
能に設けてなるものであるから、板材１９の折曲
げ幅が種々の場合であつても、板材１９の折曲げ
幅の全長に亘つて均等の押圧力を作用させること
ができ、折曲げ精度の向上を図ることができるも
のである。 As understood from the description of the embodiments above, according to the present invention, the divided mold 21 divided into a plurality of
Since the fluid pressure type pressing means 25 are respectively provided corresponding to the plurality of groups, and the fluid pressure of the pressing means 25 is adjustable, it is possible to adjust the bending width of the plate material 19 in various cases. Also, it is possible to apply a uniform pressing force over the entire length of the bending width of the plate material 19, and it is possible to improve the bending accuracy.
第１図は本発明の背景を示すプレスブレーキの
説明図第２図は同上折曲げ製品の説明図第３図は
上型と下型の全長にわたつて均一な折曲げ押圧力
を加えるプレスブレーキの説明図第４図は同上側
面図第５図は上型の分割型を２つの群に分けて別
個の押圧手段を備えたプレスブレーキの説明図第
６図は本発明の装置を備えたプレスブレーキの作
動説明図である。
図面の主要部を表わす符号の説明、１……プレ
スブレーキ、１５……パンチホルダ、１７……上
型、１９……板材、２１……分割型、２５……押
圧手段。
Figure 1 is an explanatory diagram of a press brake showing the background of the present invention. Figure 2 is an explanatory diagram of the same folded product as above. Figure 3 is a press brake that applies a uniform bending pressure over the entire length of the upper and lower dies. FIG. 4 is a side view of the same as above. FIG. 5 is an explanatory diagram of a press brake that divides the upper die into two groups and is equipped with separate pressing means. FIG. 6 is a press equipped with the device of the present invention. FIG. 3 is an explanatory diagram of brake operation. Explanation of symbols representing main parts of the drawings: 1...Press brake, 15...Punch holder, 17...Upper die, 19...Plate material, 21...Divided die, 25...Press means.
Claims (1)
エプロン１３の下部に備えた上型１７との協働に
より板材１９の折り曲げ加工を行なうプレスブレ
ーキにして、前記下型３あるいは上型１７の少な
くとも一方の金型を長手方向に複数に分割した分
割型２１に構成して設け、複数分割型２１を少な
くとも２つの群に区分して設けると共に、分割型
２１を支持したエプロンと分割型２１の各群との
間に流体圧を調整自在な流体圧式の押圧手段２５
を設け、各群に対応した押圧手段２５の流体圧を
個別に調節可能に設けてなることを特徴とするプ
レスブレーキ。1. A press brake is used to bend the plate material 19 through the cooperation of the lower die 3 provided at the upper part of the lower apron 5 and the upper die 17 provided at the lower part of the upper apron 13. At least one of the molds is configured and provided as a divided mold 21 divided into a plurality of parts in the longitudinal direction, and the plurality of divided molds 21 are divided into at least two groups, and an apron supporting the divided mold 21 and an apron that supports the divided mold 21 are provided. Fluid pressure type pressing means 25 that can freely adjust the fluid pressure between each group
A press brake characterized in that the fluid pressure of the pressing means 25 corresponding to each group can be adjusted individually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58108551A JPS603919A (en) | 1983-06-18 | 1983-06-18 | Press brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58108551A JPS603919A (en) | 1983-06-18 | 1983-06-18 | Press brake |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS603919A JPS603919A (en) | 1985-01-10 |
| JPH035243B2 true JPH035243B2 (en) | 1991-01-25 |
Family
ID=14487701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58108551A Granted JPS603919A (en) | 1983-06-18 | 1983-06-18 | Press brake |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS603919A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2510179B2 (en) * | 1987-01-14 | 1996-06-26 | 株式会社 アマダ | Folding machine |
| TR201705931A2 (en) * | 2017-04-21 | 2017-09-21 | Durmazlar Makina Sanayi Ve Ticaret Anonim Sirketi | SINGLE BODY TANDEM PRESS |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4014204A (en) * | 1974-05-27 | 1977-03-29 | Haemmerle, A.G. | Machine for processing metal in sheet or plate form |
| US4063445A (en) * | 1976-04-02 | 1977-12-20 | Haemmerle Ag Maschinenfabrik | Bending press |
| JPS592569A (en) * | 1982-06-10 | 1984-01-09 | Yokogawa Hewlett Packard Ltd | Switching regulator |
-
1983
- 1983-06-18 JP JP58108551A patent/JPS603919A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4014204A (en) * | 1974-05-27 | 1977-03-29 | Haemmerle, A.G. | Machine for processing metal in sheet or plate form |
| US4063445A (en) * | 1976-04-02 | 1977-12-20 | Haemmerle Ag Maschinenfabrik | Bending press |
| JPS592569A (en) * | 1982-06-10 | 1984-01-09 | Yokogawa Hewlett Packard Ltd | Switching regulator |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS603919A (en) | 1985-01-10 |
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