JPH07314039A - Precise 2-dimensional plastic working die for rectangular cross-section material - Google Patents
Precise 2-dimensional plastic working die for rectangular cross-section materialInfo
- Publication number
- JPH07314039A JPH07314039A JP13673794A JP13673794A JPH07314039A JP H07314039 A JPH07314039 A JP H07314039A JP 13673794 A JP13673794 A JP 13673794A JP 13673794 A JP13673794 A JP 13673794A JP H07314039 A JPH07314039 A JP H07314039A
- Authority
- JP
- Japan
- Prior art keywords
- die
- bending
- mold
- lateral pressing
- molding
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、例えば原子炉用蒸気発
生器の振れ止め金具その他板曲げ時の板厚の精度、平坦
度及び塑性加工後のプロフィルを重視する板曲げ製品の
製造に用いられる加工用金型の構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used, for example, in the manufacture of plate bending products such as steady rests for steam generators for nuclear reactors and other products in which plate thickness accuracy during plate bending, flatness and profile after plastic working are important. Related to the structure of the processing mold used.
【０００２】[0002]
【従来の技術】従来矩形断面形状を有する金属素材Ｗを
図５（ａ）に示すように曲げ半径Ｒに曲げ加工すると、
図５（ｂ）に示すように矩形断面材には曲げ加工内側部
に増肉部Ｔ1 、外側部に減肉部Ｔ2 が生ずる。2. Description of the Related Art When a metal material W having a conventional rectangular cross section is bent into a bending radius R as shown in FIG.
As shown in FIG. 5B, in the rectangular cross-section material, a thickened portion T 1 is formed on the inner side of the bending process, and a thinned portion T 2 is formed on the outer side.
【０００３】この曲げ加工により生じた板厚増肉部Ｔ1
を対向配置した上下の金型で挟持し、上面から油圧ジャ
ッキにより加圧して均等な板厚を得ていた。The thickened portion T 1 caused by this bending process
Was sandwiched between the upper and lower molds arranged opposite to each other, and pressed from above with a hydraulic jack to obtain a uniform plate thickness.
【０００４】図３は従来の曲げ加工用治具の正面図を示
し、図４は図３の上面図である。これらの図における図
の左半分を示すＡは加圧前の状態図、右半分を示すＢは
加圧時の状態を示すものである。FIG. 3 is a front view of a conventional bending jig, and FIG. 4 is a top view of FIG. A in the left half of the drawings is a state diagram before pressurization, and B in the right half is a pressurization state.
【０００５】１′，２′は上下の２分割された成形用上
金型及び下金型で、曲げ加工を施すべき矩形断面形状を
有する金属素材は、前記成形用上金型１′及び成形用下
金型２′のそれぞれの外周端部により形成された溝内に
挟み込まれ、図４に示すような横押し用金型３，４，５
により第一工程→第３工程まで曲げ加工を施される。そ
の際曲げ加工の特性からＲ形状の金属素材内側は増肉
し、外側は減肉する。Reference numerals 1'and 2'denominate upper and lower molding dies and upper and lower dies which are divided into two parts. The metal material having a rectangular cross section to be bent is the upper molding die 1'and molding. The lower die 2'is sandwiched in the grooves formed by the outer peripheral ends of the lower die 2'and is pushed laterally as shown in FIG.
Therefore, the bending process is performed from the first step to the third step. At that time, due to the characteristic of bending, the inside of the R-shaped metal material is increased in thickness and the outside is decreased in thickness.
【０００６】つぎに該曲げ加工終了後、均等な板厚を得
るため平坦修正用金型７を、これと接続する中空ジャッ
キ８の稼動により下降させ、成形用上下金型１′，２′
間の溝部に挟持した金属素材を上方より加圧して素材の
平坦度の修正を行なっている。After completion of the bending, the flatness correction mold 7 is lowered by the operation of a hollow jack 8 connected to the flatness correction mold 7 to obtain a uniform plate thickness, and the upper and lower molds 1 ', 2'for molding are formed.
The flatness of the material is corrected by pressurizing the metal material sandwiched in the groove between them from above.
【０００７】なお３は第一工程横押し用金型、４は第二
工程横押し用金型、５は第三工程横押し用金型で、各横
押し金型はガイド１３により案内移動され、油圧ジャッ
キ６により曲げ加工のための加圧を行なうものである。Reference numeral 3 is a first step lateral pushing die, 4 is a second step lateral pushing die, and 5 is a third step lateral pushing die. Each lateral pushing die is guided and moved by a guide 13. The hydraulic jack 6 applies pressure for bending.
【０００８】また９は中空ジャッキ８の吊り下げ用フラ
ンジ、１２は吊り下げ用ナット、１１はベース板であ
る。Reference numeral 9 is a hanging flange of the hollow jack 8, 12 is a hanging nut, and 11 is a base plate.
【０００９】[0009]
【発明が解決しようとする課題】しかしながら前述のよ
うな従来の成形方法による平坦度を出すための高圧力に
よる上面よりの加圧での板厚修正加工では、上面からの
油圧ジャッキによる加圧力を高くする必要があった。そ
のため油圧ジャッキその他の機器に無理な力がかかり故
障の原因となっていた。However, in plate thickness correction processing by pressurization from the upper surface by high pressure for producing flatness by the conventional molding method as described above, the pressing force by the hydraulic jack from the upper surface is used. Had to be higher. As a result, excessive force was applied to the hydraulic jack and other equipment, causing a failure.
【００１０】本発明は金型の形状を改良し、曲げ加工時
に生ずる板厚の増肉した部分を所定の公差内に低い圧力
により圧縮加工し、正確な曲げ寸法を確保することを可
能とした矩形断面材の精密二次元塑性加工用金型を提供
することを目的としている。The present invention improves the shape of the mold and makes it possible to secure an accurate bending dimension by compressing the thickened portion produced during bending by a low pressure within a predetermined tolerance. It is an object of the present invention to provide a die for precision two-dimensional plastic working of a rectangular cross section material.
【００１１】[0011]
【課題を解決するための手段】前記目的を達成するため
の構成として本発明の矩形断面材の精密二次元塑性加工
用金型は、上下に２分割され、対向配置された成形用上
金型及び成形用下金型の合わせ面中央部を円弧状の中空
形状になるよう構成すると共に、前記各成形用上下金型
の外周端部に、矩形断面を有する金属素材を挟み込むた
めの溝部を形成し、さらに該溝部において前記金属素材
に接する部分に圧縮用金型を、上下各成形用金型の対向
する内面部に取付け、取外し自由に装着し、該圧縮用金
型の材質を、前記成形用金型材質よりも硬い材料で構成
したことを特徴とするものである。[MEANS FOR SOLVING THE PROBLEMS] As a structure for achieving the above object, a mold for precision two-dimensional plastic working of a rectangular cross-section material according to the present invention is divided into upper and lower halves, which are arranged opposite to each other. And forming a central portion of the mating surface of the lower molding die into an arcuate hollow shape, and forming a groove portion for sandwiching a metal material having a rectangular cross section at the outer peripheral ends of the upper and lower molding dies. Then, a compression die is attached to a portion of the groove that is in contact with the metal material, on the inner surface portions of the upper and lower molding dies facing each other, and is freely attached and detached. It is characterized in that it is made of a material that is harder than the material of the metal mold.
【００１２】[0012]
【作用】上記構成よりなる本発明の金型によれば、成形
用金型の外周端部に形成した溝部内に取付け、取外し自
由に装着した圧縮用金型の材質を前記成形用金型材質よ
りも硬い材料で構成したことにより曲げ加工時における
被加工素材の板厚の変化を抑え、曲げ加工時の滑りキズ
の発生を防ぐことができる。According to the mold of the present invention having the above-mentioned structure, the material of the compression mold mounted in the groove formed at the outer peripheral end of the molding mold and detachably mounted is the molding mold material. Since the material is made of a harder material, it is possible to suppress the change in the plate thickness of the material to be processed during bending and prevent the occurrence of slip scratches during bending.
【００１３】また上下成形用金型の中央部の上下金型の
当り面に円弧状の空洞部を形成したため、平坦度を出す
ため平坦修正用ジャッキにより上型を下方に加圧する際
の圧力を一点に集中することにより該圧力を少なくする
ことができる。Further, since a circular arc-shaped cavity is formed on the contact surfaces of the upper and lower molds in the central portion of the upper and lower molds, the pressure for pressing the upper mold downward by the flatness correction jack is applied in order to obtain the flatness. By concentrating on one point, the pressure can be reduced.
【００１４】[0014]
【実施例】以下図面により本発明の一実施例について説
明する。図１は本実施例に係る金型及びこれと関係する
装置の全体正面図、図２は図１の上面図を示し、各図の
左半分のＡ部分は加工前の状態、図の右半分のＢ部分は
加工完了時の状態をそれぞれ示している。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an overall front view of a mold according to this embodiment and an apparatus related thereto, and FIG. 2 is a top view of FIG. 1. A part in the left half of each drawing is a state before processing, right half of the drawing. Parts B of FIG. 3 indicate the states when the processing is completed.
【００１５】また図６（ａ），（ｂ）は本発明金型と従
来金型の構成及び作用を比較して示した説明図である。6 (a) and 6 (b) are explanatory views showing the structures and functions of the mold of the present invention and the conventional mold in comparison.
【００１６】これらの図において、１は成形用上金型で
上下金型の合せ面中央部に円弧状の空洞部１６が設けら
れている。In these figures, reference numeral 1 is an upper mold for molding, and an arc-shaped cavity 16 is provided at the center of the mating surfaces of the upper and lower molds.
【００１７】そして該成形用上金型１及び成形用下金型
２の外周端部には圧縮用金型１４が成形用上金型及び成
形用下金型本体１，２の素材より硬い材質で取付け取外
し自在に設けられ対向配置した成形用下金型２の間に被
加工用素材をセットする溝１５が上下各金型１，２の外
周端部にわたり形成されている。At the outer peripheral ends of the upper molding die 1 and the lower molding die 2, a compression die 14 is made of a material harder than the materials of the upper molding die and the lower molding die bodies 1, 2. A groove 15 for setting a material to be processed is formed between the lower molding dies 2 which are provided so as to be freely attached and detached and which are opposed to each other, over the outer peripheral ends of the upper and lower dies 1 and 2.
【００１８】２は成形用下金型でベース板１１上に設け
られ、その構成は、成形用上金型１と同様に、端部外周
に圧縮用金型１４に取外し自在に装着すると共に中央部
に円弧状の空洞部１６が設けられている。A lower molding die 2 is provided on the base plate 11, and its construction is similar to that of the upper molding die 1, and is detachably attached to the compression die 14 at the outer periphery of the end and at the center. A hollow portion 16 having an arc shape is provided in the portion.
【００１９】３は第一工程横押し金型で横押し金型用の
油圧ジャッキ６に連結されている。Reference numeral 3 denotes a first-step lateral pressing die, which is connected to a hydraulic jack 6 for the lateral pressing die.
【００２０】４は第二工程横押し金型で図２に示すよう
に放射状に配置された横押し金型用の油圧ジャッキ６−
１に連結されている。Reference numeral 4 designates a second step horizontal pushing die, which is a hydraulic jack 6 for lateral pushing die which is radially arranged as shown in FIG.
It is connected to 1.
【００２１】５は第三工程横押し金型で油圧ジャッキ６
−１と同様に放射状に配置された横押し金型用の油圧ジ
ャッキ６−２に連結されている。Reference numeral 5 designates a third step lateral pushing die which is a hydraulic jack 6.
Like -1, it is connected to a hydraulic jack 6-2 for a lateral push die which is radially arranged.
【００２２】７は平坦修正用金型で、中央部に円弧状の
空洞部が設けられると共に上面部で平坦修正用中空ジャ
ッキ８と連結されている。Reference numeral 7 denotes a flatness correction mold, which is provided with an arcuate hollow portion at the center and is connected to the flatness correction hollow jack 8 at the upper surface.
【００２３】そして、該中空ジャッキ８は、中空ジャッ
キ吊り下げ用フランジ９を介してガイドボルト１０に固
定されている。The hollow jack 8 is fixed to the guide bolt 10 via a hollow jack suspension flange 9.
【００２４】１２は吊り下げ用ナットまた１３は横押し
金型３，４，５のガイドでベース板１１上に設置されて
いる。Reference numeral 12 is a hanging nut, and 13 is a guide of the lateral pressing dies 3, 4, and 5 and is installed on the base plate 11.
【００２５】つぎに本実施例金型を用いた曲げ加工作用
について説明すると次の手順のとおりである。Next, the bending operation using the mold of this embodiment will be described as follows.
【００２６】（１）被加工金属素材を成形用上下金型
１，２の外周端部に形成した溝１５の間に挟み込みセッ
トする。(1) The metal material to be processed is set by being sandwiched between the grooves 15 formed on the outer peripheral ends of the upper and lower molding dies 1 and 2.
【００２７】（２）第一工程横押し金型３を横押し金型
用油圧ジャッキ６にて作動し、成形用金型１，２の外周
より加圧し、第一工程の曲げ加工を行なう。(2) First step The lateral pressing die 3 is operated by the lateral pressing die hydraulic jack 6 and pressure is applied from the outer periphery of the molding dies 1 and 2 to perform the bending process in the first step.
【００２８】（３）該作業が完了すると、第一工程の曲
げで図５（ｂ）に示すように矩形断面素材Ｗの曲げ方向
内側端部が増肉しているため、平坦修正用中空ジャッキ
８を作動して平坦修正用金型７を下降し、成形用上金型
１の上面部分に当接させて該成形用上金型１を下方に向
けて加圧し、上下各成形用金型１，２の外周端部の溝１
５にセットした被加工用金属材料の曲げ加工により生じ
た増肉部を平坦化し、その平坦化修正作業の完了後に、
横押し金型用油圧ジャッキ６及び平坦修正用中空ジャッ
キ８を元の位置に戻す。(3) When the work is completed, the inner wall of the rectangular cross-section material W in the bending direction is thickened in the bending in the first step as shown in FIG. 8 is operated to lower the flatness correction mold 7 to abut the upper surface of the molding upper mold 1 and press the molding upper mold 1 downward to form upper and lower molding molds. Groove 1 at the outer peripheral end of 1, 2
After flattening the thickened portion generated by bending the metal material for processing set to 5, and completing the flattening correction work,
The hydraulic jack 6 for the lateral push die and the hollow jack 8 for flatness correction are returned to their original positions.
【００２９】（４）つぎに第二工程横押し金型４により
再度第一工程同様に次工程の曲げ加工を行なう。そして
該作業終了後は（３）で説明したような手順で平坦度の
修正を行なったのち、各油圧ジャッキ６，８を後退させ
る。(4) Next, the bending process of the next step is performed again by the second step lateral pressing die 4 as in the first step. After completion of the work, the flatness is corrected by the procedure described in (3), and then the hydraulic jacks 6 and 8 are retracted.
【００３０】（５）最後に第三工程の横押し金型５で曲
げ角度の深い（曲率の大きい）Ｒに曲げるが、この際第
一工程横押し金型３で中央部を押し、第三工程横押し金
型５の作動中の被加工素材の折れ曲がりを防止する。(5) Finally, the lateral pressing die 5 in the third step bends to a deep bending angle (large curvature) R. At this time, the central portion is pressed by the lateral pressing die 3 in the first step to make the third step. It prevents the bending of the material to be processed during the operation of the process horizontal pushing die 5.
【００３１】（６）第三工程横押し金型５で最終的に矩
形断面金属素材の曲げ作業が完了すると、平坦修正用中
空ジャッキ８の作動により平坦修正用金型７を下降し、
成形用上金型１を下方に移動させ、溝１５間にセットし
た素材を圧縮用金型１４により加圧し、曲げ加工により
生じた増肉部、減肉部の平坦化修正作業を更に行ない、
その後第三工程横押し金型５及び平坦修正用中空ジャッ
キ８を後退させすべての曲げ加工及び平坦化作業を完了
する。(6) Third step When the bending work of the metal material having the rectangular cross section is finally completed by the lateral pressing die 5, the flatness correcting hollow mold 8 is actuated to lower the flatness correcting die 7,
The upper molding die 1 is moved downward, the material set between the grooves 15 is pressed by the compression die 14, and flattening correction work of the thickened portion and the thinned portion caused by bending is further performed.
After that, the third step lateral pressing die 5 and the flatness correcting hollow jack 8 are retracted to complete all bending and flattening operations.
【００３２】以上本発明の１実施例につき縷々説明した
が、本発明は上記実施例に限定されるものでなく、本発
明技術思想の範囲内において設計・変更が可能であり、
それらは何れも本発明の技術的範囲に属する。Although one embodiment of the present invention has been briefly described above, the present invention is not limited to the above embodiment and can be designed and changed within the scope of the technical idea of the present invention.
All of them belong to the technical scope of the present invention.
【００３３】[0033]
【発明の効果】以上述べたように本発明の矩形断面材の
精密二次元塑性加工用金型によれば次のような効果を奏
する。As described above, the precision two-dimensional plastic working die for rectangular cross-section material according to the present invention has the following effects.
【００３４】（１）成形用上下金型の外周端部に形成し
た溝部に臨んで前記成形用金型の材質よりも硬い材料製
の圧縮用金型を装着し、該圧縮用金型により被加工金属
素材を挟持した後、被加工金属素材の曲げ加工を行なう
ので、曲げ加工時の滑りキズの発生を防ぐことができ、
出来上り製品の表面状態を良好にできる。(1) A compression mold made of a material harder than the material of the molding mold is mounted so as to face the groove formed in the outer peripheral ends of the upper and lower molding molds, and the compression mold is used to cover the mold. After sandwiching the processed metal material, the metal material to be processed is bent, so it is possible to prevent the occurrence of slip scratches during bending,
The surface condition of the finished product can be improved.
【００３５】（２）前記圧縮用金型を上下各金型端部に
おいて取付け取外し自由としたため、必要に応じて圧縮
用金型の材質を変更することが可能であると共に、成形
用上下金型の中央部当り面個所を円弧状の空洞部に形成
したため、平坦修正時にかかる圧力が図６（ｂ）に示す
ように従来金型と比較して少なくなる。(2) Since the compression mold is freely attached and detached at the upper and lower mold ends, the material of the compression mold can be changed as required, and the upper and lower molds for molding can be changed. Since the central contact surface is formed in an arc-shaped cavity, the pressure applied at the time of flatness correction is smaller than that of the conventional mold as shown in FIG. 6 (b).
【図１】本発明の一実施例に係る金型を取付けた治具の
正面図で、Ａは加工前の状態図、Ｂは加工完了時の状態
図である。FIG. 1 is a front view of a jig having a mold according to an embodiment of the present invention, A is a state diagram before processing, and B is a state diagram when processing is completed.
【図２】図１の上面図で、Ａは加工前の状態、Ｂは加工
完了時の状態図である。FIG. 2 is a top view of FIG. 1, where A is a state before processing and B is a state diagram when processing is completed.
【図３】従来の曲げ加工用治具の正面図で、Ａは加工前
の状態、Ｂは加工完了時の状態図である。FIG. 3 is a front view of a conventional bending jig, where A is a state before processing and B is a state diagram when processing is completed.
【図４】図３の上面図で、Ａは加工前の状態、Ｂは加工
完了時の状態図である。FIG. 4 is a top view of FIG. 3, where A is a state before processing and B is a state diagram when processing is completed.
【図５】矩形断面材の曲げ加工時の形状を示すもので、
（ａ）は斜視図、（ｂ）は（ａ）のＡ−Ａ断面図であ
る。FIG. 5 shows a shape of a rectangular cross-section material when bending,
(A) is a perspective view, (b) is an AA sectional view of (a).
【図６】本発明金型と従来金型の比較図で、（ａ）は両
金型の構成比較図、（ｂ）は両金型の作用効果の差を明
確にする説明図である。6A and 6B are a comparative view of the mold of the present invention and a conventional mold, FIG. 6A is a structural comparison diagram of both molds, and FIG. 6B is an explanatory diagram for clarifying a difference in action and effect of both molds.
１，１′ 成形用上金型 ２，２′ 成形用下金型 ３ 第一工程横押し金型 ４ 第二工程横押し金型 ５ 第三工程横押し金型 ６，６−１，６−２ 横押し金型用油圧ジャッキ ７ 平坦修正用金型 ８ 平坦修正用中空ジャッキ １０ ガイドボルト １１ ベース板 １２ 吊り下げ用ナット １３ 横押し金型移動ガイド １４ 圧縮用金型 １５ 溝部 １６ 空洞部 Ｗ 矩形断面材（被加工用金属素材） 1,1 'Upper mold for molding 2,2' Lower mold for molding 3 First step lateral pressing mold 4 Second step lateral pressing mold 5 Third step lateral pressing mold 6,6-1,6- 2 Hydraulic jack for lateral pressing mold 7 Flat-correcting mold 8 Flat-correcting hollow jack 10 Guide bolt 11 Base plate 12 Hanging nut 13 Side-pressing mold moving guide 14 Compression mold 15 Groove 16 Cavity W Rectangle Section material (metal material for processing)
Claims (1)
上金型及び成形用下金型の合わせ面中央部を中空形状に
なるよう構成すると共に、前記各成形用上下金型の外周
端部に、矩形断面を有する金属素材を挟み込むための溝
部を形成し、さらに該溝部において前記金属素材に接す
る部分に、圧縮用金型を、上下各成形用金型の対向する
内面に取付け取外し自由に装着し、該圧縮用金型の材質
を、前記成形用金型材質よりも硬い材料で構成したこと
を特徴とする矩形断面材の精密二次元塑性加工用金型。1. A molding upper mold and a molding lower mold, which are vertically divided into two and are opposed to each other, are configured such that a central portion of a mating surface has a hollow shape, and outer peripheral ends of the respective molding upper and lower molds. A groove for inserting a metal material having a rectangular cross section is formed in the portion, and a compression mold is attached to the inner surface of each of the upper and lower molding dies facing each other at a portion of the groove in contact with the metal material. A precision two-dimensional plastic working die having a rectangular cross-section material, characterized in that the material of the compression die is made of a material harder than the molding die material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13673794A JP3519452B2 (en) | 1994-05-27 | 1994-05-27 | Apparatus for bending rectangular section material and method for bending rectangular section material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13673794A JP3519452B2 (en) | 1994-05-27 | 1994-05-27 | Apparatus for bending rectangular section material and method for bending rectangular section material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07314039A true JPH07314039A (en) | 1995-12-05 |
| JP3519452B2 JP3519452B2 (en) | 2004-04-12 |
Family
ID=15182334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13673794A Expired - Lifetime JP3519452B2 (en) | 1994-05-27 | 1994-05-27 | Apparatus for bending rectangular section material and method for bending rectangular section material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3519452B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010065933A (en) * | 2008-09-11 | 2010-03-25 | Nhk Spring Co Ltd | Spacer, method of processing the same and method of manufacturing heat exchanger |
-
1994
- 1994-05-27 JP JP13673794A patent/JP3519452B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010065933A (en) * | 2008-09-11 | 2010-03-25 | Nhk Spring Co Ltd | Spacer, method of processing the same and method of manufacturing heat exchanger |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3519452B2 (en) | 2004-04-12 |
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