JPS6215694B2 - - Google Patents
Info
- Publication number
- JPS6215694B2 JPS6215694B2 JP15510076A JP15510076A JPS6215694B2 JP S6215694 B2 JPS6215694 B2 JP S6215694B2 JP 15510076 A JP15510076 A JP 15510076A JP 15510076 A JP15510076 A JP 15510076A JP S6215694 B2 JPS6215694 B2 JP S6215694B2
- Authority
- JP
- Japan
- Prior art keywords
- forming
- lip
- roll
- curvature
- shape
- 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
- 239000000047 product Substances 0.000 claims description 38
- 238000000034 method Methods 0.000 claims description 25
- 238000005452 bending Methods 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 9
- 239000012467 final product Substances 0.000 claims description 4
- 238000000465 moulding Methods 0.000 description 18
- 230000000694 effects Effects 0.000 description 6
- 238000007493 shaping process Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005097 cold rolling Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Bending Of Plates, Rods, And Pipes (AREA)
- Rod-Shaped Construction Members (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、多数のロールスタンドを持つ冷間ロ
ール成形装置により、断面形状がリツプ部に溝、
折り返し、先端折り曲げ等の成形部を有する全体
がＣ形類似形であり、長手方向にリツプ側を凹、
ウエブ側を凸とする方向の湾曲を有し、帯板素材
からロール成形した形材成形品およびその曲げ成
形法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention uses a cold roll forming apparatus having a large number of roll stands to form a roll having a cross-sectional shape with grooves in the lip portion.
The overall shape is similar to the C shape, with molded parts such as folding back and bending the tip, and the lip side is concave in the longitudinal direction.
The present invention relates to a shaped product having a curve in a direction in which the web side is convex and is roll-formed from a strip material, and a method for bending the same.
金属帯板を多数のロールスタンドを経て、徐々
に所定の形状に冷間ロール成形する場合、被成形
材の両縁部は長手方向に伸び変形し易く、その結
果、Ｃ形材等において、断面完成後リツプ側が
凸、ウエブ側が凹なる長手方向湾曲を生じ易い。
このため、矯正機などを利用して長手方向に真直
に矯正することが通常行なわれている。しかし、
前記方向に対し、逆方向の長手方向湾曲、つまり
リツプ側を凹、ウエブ側を凸とする湾曲を有する
成形品を冷間ロール成形で製することは困難で、
通常プレス成形を行なわざるを得ない例が多い。
しかし、プレス成形では生産性が悪く、また長尺
体の成形品を成形するには極めて非能率であると
ともに高価であつた。したがつて、自動車のバン
パーなど大量に使用する成形品に対して、長手方
向の湾曲の曲率半径を小さくでき、薄板でも座屈
を生ずることのない冷間ロール成形による能率的
な製造法の確立が望まれていた。しかしながら、
例えばリツプ溝形鋼状断面の形材を長手方向に一
定の曲率を与えて成形する場合、リツプ側を凹、
ウエブ側を凸とする湾曲を与えて成形するには、
煩雑な問題があつた。すなわち、通常の上下ロー
ル成形において、前記のようにリツプ部となる帯
板の両縁部が立上り成形時に長さ方向に伸び変形
するため、製品は所望の方向とは逆の湾曲形状と
なり易く、またこのリツプ部をその後の湾曲付与
成形で圧縮変形させるに際し座屈を生ずるからで
ある。
When a metal strip is cold-roll-formed into a predetermined shape gradually through multiple roll stands, both edges of the material to be formed tend to stretch and deform in the longitudinal direction. After completion, it tends to curve in the longitudinal direction, with the lip side being convex and the web side being concave.
For this reason, it is common practice to straighten the material in the longitudinal direction using a straightening machine or the like. but,
It is difficult to produce a molded product with a longitudinal curvature in the opposite direction to the above direction, that is, a curvature in which the lip side is concave and the web side is convex, by cold roll forming.
There are many cases where press molding has to be carried out.
However, press molding has poor productivity and is extremely inefficient and expensive for molding long products. Therefore, for molded products that are used in large quantities, such as automobile bumpers, it is necessary to establish an efficient manufacturing method using cold roll forming, which can reduce the radius of curvature in the longitudinal direction and prevent buckling even in thin sheets. was desired. however,
For example, when forming a section of lip channel steel with a constant curvature in the longitudinal direction, the lip side should be concave,
To form a curved shape with a convex web side,
A complicated problem arose. That is, in normal upper and lower roll forming, both edges of the strip serving as the lip portion stretch and deform in the length direction during upright forming as described above, so the product tends to have a curved shape in the opposite direction to the desired direction. This is also because buckling occurs when this lip portion is compressed and deformed in the subsequent bending molding.
本発明は上記の問題点を解決するために、冷間
ロール成形法により最終製品でリツプ部となる部
分に予め曲げ成形部を形成した後、リツプ部およ
びフランジ部の立上り成形をダウンヒル成形法で
行なうことにより、リツプ部の伸び変形量が低減
され、また曲げ変形部の存在により湾曲付与成形
時の座屈が防止されることを知見したことに基づ
くものである。
In order to solve the above-mentioned problems, the present invention uses a cold roll forming method to form a bending part in advance in the part that will become the lip part in the final product, and then performs upright forming of the lip part and flange part by a downhill forming method. This is based on the finding that by doing so, the amount of elongation deformation of the lip portion is reduced, and the existence of the bending deformation portion prevents buckling during bending forming.
本発明はリツプ部に溝、折り返し、先端折り曲
げ等の成形部を有するＣ形類似断面形であり、か
つ該リツプ側を凹、ウエブ側を凸とする方向の長
手方向湾曲を有し、帯板素材からロール成形法に
より製したことを特徴とする形材成形品、並びに
該成形品の成形方法であり、先ずリツプ部の曲げ
成形部を単数またはロールスタンドの成形接触点
がほぼ同一高さの複数のロールスタンドで曲げ成
形する成形第１工程、該第１工程後ダウンヒル成
形法であり、ウエブの両縁部の曲げコーナーを曲
げ成形する複数段のロールスタンドによる成形第
２工程および該成形第２工程後、リツプ側を凹、
ウエブ側を凸とする長手方向湾曲を付与するアツ
プヒルによる成形第３工程からなることを特徴と
する形材成形品の成形方法である。
The present invention has a C-shaped similar cross-sectional shape with forming parts such as grooves, folds, and bent ends in the lip part, and has a longitudinal curvature in a direction in which the lip side is concave and the web side is convex. A shape molded product characterized in that it is manufactured from a raw material by a roll forming method, and a method for forming the molded product, in which the bending part of the lip part is first bent so that the molding contact points of a single or roll stand are at approximately the same height. A first step of forming by bending with a plurality of roll stands, a second step of forming after the first step using a plurality of roll stands, which is a downhill forming method, and bending corners of both edges of the web, and a second step of forming. After 2 steps, concave the lip side,
This is a method for forming a shaped product, characterized by comprising a third step of forming by uphilling, which imparts longitudinal curvature with the web side convex.
前述の縁（エツジ）部の伸び変形および座屈
は、それぞれ素材帯板の幅が広い、成形断面形状
が大きい、素材帯板が薄いほど大となる。一般に
パイプ等の成形断面が円形の場合には、Ｔ／Ｄ
（但しＤは成形断面の直径、Ｔは成形板厚さ）が
１％以下の値を示すときは、溶接ができる程度の
成形は不可能であるとされている。これはロール
成形途中におけるエツジ部に作用する引張、圧縮
変形応力と板幅中央底部に作用する塑性変形応力
のアンバランスにより、第１図および第２図に示
す所定のＣ形類似形状１に対し、帯板エツジ部に
座屈や伸びの波状２を呈したり、成形品断面の一
部が内部側に落ち込む等の変形３を生じたりす
る。この現象を防止するには、ダウンヒルと称す
るロールスタンドの成形接触点の高さを、各段に
おいて、工程が進むにつれて下げることにより、
エツジ部の伸びを抑制し、成形品の変形バランス
をとる方法が有る。なお、この成形法に対し、逆
にアツプヒルと称してロールスタンドの成形接触
点の高さを各段において、工程が進むにつれて上
げる成形方法もある。
The above-mentioned elongation deformation and buckling of the edge portion become larger as the width of the material strip is wider, the formed cross-sectional shape is larger, and the material strip is thinner, respectively. Generally, when the formed cross section of pipe etc. is circular, T/D
(However, D is the diameter of the formed cross section, and T is the thickness of the formed plate.) When the value is less than 1%, it is said that forming to the extent that welding is possible is impossible. This is due to the unbalance between the tensile and compressive deformation stress acting on the edge part during roll forming and the plastic deformation stress acting on the center bottom of the sheet width. , buckling or elongation wavy 2 may occur at the edge of the strip, or deformation 3 may occur, such as a part of the cross section of the molded product falling inward. To prevent this phenomenon, the height of the forming contact point of the roll stand, called a downhill, is lowered at each stage as the process progresses.
There is a method of suppressing the elongation of the edges and balancing the deformation of the molded product. In contrast to this molding method, there is also a molding method called uphill, in which the height of the molding contact point of the roll stand is increased at each stage as the process progresses.
本発明は、上記ダウンヒルとアツプヒルの両者
の原理を応用し、ダウンヒルとアツプヒルとを組
合せ、かつリツプ部に溝、折り返し、先端折り曲
げ等を形成するように冷間ロール成形して一定の
半径Ｒを長手方向に有する湾曲を得んとするもの
である。しかしてその湾曲は、リツプ側を凹、ウ
エブ側を凸とする方向とすることを特徴とする。 The present invention applies the principles of both the downhill and uphill processes described above, combines the downhill and uphill processes, and cold-rolls the lip to form grooves, folds, and bent ends to form a constant radius R. The objective is to obtain a curvature in the longitudinal direction. The curvature is characterized in that the lip side is concave and the web side is convex.
ロール成形による縁伸びは、主に本発明におい
て断面形状がＣ形類似形形材成形品とは、第３図
ｂに示すリツプ部に溝を有する軽量リツプ溝形鋼
状のみに拘束されず、第４図ａ，ｂ，ｃ，ｅに示
すように、折り返し、先端折り曲げ等を有しても
よく、さらに第３図ｂのフランジ部５、ウエブ部
６に折れ部を有してもよい。 The edge elongation due to roll forming is mainly limited to the lightweight lip channel steel shape having a groove in the lip portion shown in FIG. As shown in FIGS. 4a, b, c, and e, it may be folded back, the tip may be bent, or the flange portion 5 and web portion 6 shown in FIG. 3b may have bent portions.
また、本発明におけるリツプ側を凹、ウエブ側
を凸とする方向の湾曲とは、第３図に示すよう
に、成形品の長手方向の曲り、つまり湾曲がリツ
プ４側が曲率半径Ｒの中心側、ウエブ部６側が曲
率半径Ｒの中心に対し、逆の側となる湾曲を意味
する。 In addition, in the present invention, curvature in a direction in which the lip side is concave and the web side is convex means a curvature in the longitudinal direction of the molded product, that is, a curvature in which the lip 4 side is on the center side of the radius of curvature R, as shown in FIG. , means a curve in which the web portion 6 side is on the opposite side to the center of the radius of curvature R.
本発明の一実施例を第５，６，７図で説明す
る。
An embodiment of the present invention will be described with reference to FIGS. 5, 6, and 7.
第５図は、冷間ロール成形する成形ロールスタ
ンドの略図を示す。成形ロールをスタンドNo.１か
らNo.７まで組込み、逐次成形を行なうものであ
る。第６図は、第５図の各スタンドで成形される
帯板の横断面形状を示す図である。第５図におい
て各々の成形ロールは成形機に内蔵した駆動装置
により、動力を伝達して帯板７をスタンド番号No.
１より順次成形を行ない、スタンド番号No.７で所
望の最終断面形状および湾曲が与えられる。前記
成形過程において、スタンド番号No.１でリツプ部
となる被成形材７の部分に溝加工を行ない、No.２
〜No.５までは下ロール１１，１２，１３，１４と
成形機のベツド８との距離、Ｂ，Ｃ，Ｄ，Ｅ（ベ
ツドは一般に平面であるが、スタンド中間で段差
のあるベツドの時は基準面をベツド８と称する）
を逐次小さくして成形する、いわゆるダウンヒル
成形を行ない、スタンド番号No.６，No.７は下ロー
ル１５，１６とベツド８との距離Ｆ，Ｇを逐次大
きくして成形する、いわゆるアツプヒル成形を行
ないながら、断面形状の完成と第３図に示す曲率
半径Ｒの長手方向に一定の、リツプ側が凹となる
湾曲を連続的に付与する。 FIG. 5 shows a schematic diagram of a forming roll stand for cold rolling. Forming rolls are installed in stands No. 1 to No. 7 to perform sequential forming. FIG. 6 is a diagram showing the cross-sectional shape of the strip formed in each stand of FIG. 5. In FIG. 5, each forming roll transmits power by a drive device built into the forming machine to move the strip plate 7 to the stand number.
The molding is performed sequentially from No. 1, and the desired final cross-sectional shape and curvature are given at stand No. 7. In the forming process, grooves are formed in the part of the material to be formed 7 that will become the lip part with stand number 1, and with stand number 2.
~ No. 5 is the distance between the lower rolls 11, 12, 13, 14 and the molding machine bed 8, B, C, D, E (generally the bed is flat, but if there is a step in the middle of the stand) (refers to the reference plane as bed 8)
So-called downhill molding is performed, in which the molding is performed by successively decreasing the distance F and G between the lower rolls 15 and 16 and the bed 8. While doing this, the cross-sectional shape is completed and a constant curvature with a radius of curvature R shown in FIG. 3 in the longitudinal direction, with the lip side being concave, is continuously applied.
また本発明においては、ダウンヒル成形工程で
リツプ部とフランジ部の断面形状の成形をほぼ終
了させ、アツプヒル成形工程でリツプ部の若干の
成形と成形品長手方向湾曲成形を行なうと良好な
成形品が得られる。一方、ダウンヒル成形を行な
わない場合、すなわち第５図のＢ，Ｃ，Ｄ，Ｅ寸
法が同一の場合、第６図に示す帯板の縁部は大き
な塑性伸びが発生し、このままの状態でさらに成
形を進行して行くと、成形品は第３図とは反対方
向の曲率を有する成形品が得られ、リツプ４側が
凹となる所望の湾曲を有する成形品は得られな
い。 In addition, in the present invention, a good molded product can be obtained by almost completing the shaping of the cross-sectional shape of the lip part and flange part in the downhill molding process, and performing some shaping of the lip part and shaping the longitudinal direction of the molded product in the uphill molding process. can get. On the other hand, if downhill forming is not performed, that is, if the dimensions B, C, D, and E in Fig. 5 are the same, large plastic elongation will occur at the edge of the strip shown in Fig. 6, and if it continues as it is, it will As the molding progresses, a molded product having a curvature in the opposite direction to that shown in FIG. 3 is obtained, and a molded product having the desired curvature in which the lip 4 side is concave cannot be obtained.
スタンドNo.２〜No.５間のダウンヒル量の合計
は、最終成形品形状の断面高さの0.5〜2.5倍にと
つた場合最も有効である。ダウンヒル量が最終製
品形状の断面高さの2.5倍を越えるとリツプ４に
は過大の圧縮歪が与えられる結果となり、スタン
ドNo.６，７においてアツプヒル成形を行なうと座
屈を起こし易い。またダウンヒル量が0.5倍以下
であると、十分なダウンヒル効果が得られず、ダ
ウンヒルを行なわない場合の成形と大差のない結
果しか得られない。したがつて、成形品を長手方
向に一定の曲率を有した湾曲成形品とする場合の
ダウンヒル量は、最終製品断面形状高さの0.5〜
2.5倍が最適である。 It is most effective when the total amount of downhill between stands No. 2 to No. 5 is 0.5 to 2.5 times the cross-sectional height of the final molded product shape. If the downhill amount exceeds 2.5 times the cross-sectional height of the final product shape, excessive compressive strain will be applied to the lip 4, and if uphill forming is performed on stands No. 6 and 7, buckling is likely to occur. Further, if the downhill amount is 0.5 times or less, a sufficient downhill effect cannot be obtained, and results that are not significantly different from molding without downhilling can be obtained. Therefore, when the molded product is a curved molded product with a constant curvature in the longitudinal direction, the downhill amount is 0.5 to 0.5 to the height of the final product cross-sectional shape.
2.5x is optimal.
アツプヒル量をある点以上大きくするとリツプ
部４には、過大の圧縮歪が課せられることにな
り、局部的な座屈を生ずる。この局部的に座屈し
た時点が成形品の限界曲率半径である。 If the uphill amount is increased beyond a certain point, excessive compressive strain will be imposed on the lip portion 4, causing local buckling. The point at which this local buckling occurs is the critical radius of curvature of the molded product.
第３図ｂに示す本発明のリツプ部に溝を設ける
曲げ成形部のうち、溝を成形するロールスタンド
の例を第７図に示す。 FIG. 7 shows an example of a roll stand for forming grooves in the bending part of the present invention shown in FIG. 3b, in which grooves are formed in the lip portion.
冷間ロール成形機の軸２７，２８はスタンドに
内蔵された駆動装置により回転力を伝達し、回転
自在である。軸２７，２８にはカラー２９，３
０，３１，３２，３３，３４、スリーブ３５，３
６、所望の形状をしたロール片、３７，３８，３
９，４０を組込み、締付装置４１，４２により定
位置に固着する。ロール片３７，３８はスリーブ
３５，３６に緩装し、回転自在である。軸２８に
伝達した回転力はキー４４によりロール片３９，
４０に伝達される。成形品のリツプ部構成部分へ
の構成形は、ロール片３９，４０の外周面上に設
けた突起４７，４８およびロール片３７，４０に
設けた溝部４５，４６により行なわれる。 The shafts 27 and 28 of the cold roll forming machine are rotatable by transmitting rotational force by a drive device built into the stand. Collars 29, 3 are attached to the shafts 27, 28.
0, 31, 32, 33, 34, sleeve 35, 3
6. Roll piece with desired shape, 37, 38, 3
9 and 40 are assembled and fixed in place by tightening devices 41 and 42. The roll pieces 37, 38 are loosely attached to the sleeves 35, 36 and are rotatable. The rotational force transmitted to the shaft 28 is applied to the roll piece 39 by the key 44.
40. The configuration of the molded product into the lip component is achieved by projections 47, 48 provided on the outer peripheral surfaces of the roll pieces 39, 40 and grooves 45, 46 provided in the roll pieces 37, 40.
第３図、第６図および第７図ではリツプ部に溝
を有する断面形状のＣ形類似形成形品およびその
成形方法を示したが、本発明としてはリツプ部の
座屈限界応力を高めるために第４図に示す如く、
リツプ部に溝ａの代りに折り返しｂ、先端折り曲
げｃ等を設けてもよい。 3, 6, and 7 show a C-shaped shaped product having a groove in the lip and a method for forming the same, but the present invention is designed to increase the buckling limit stress of the lip. As shown in Figure 4,
Instead of the groove a, the lip portion may be provided with a folded back b, a bent tip c, or the like.
本発明でダウンヒルとは、前段のロールスタン
ドに対して後段のロールスタンドでの被成形材の
ウエブ部が、その両側のフランジ、リツプ側と逆
の方向に変位されつつ曲げ成形されるものをい
う。すなわち、ウエブ部に対しフランジ部を立ち
上げる通常の成形方法においては、第５図のよう
に、Ｂ，Ｃ，Ｄ，Ｅとウエブ部の位置を順次降下
させるものであり、アツプヒルはこの逆である。 In the present invention, "downhill" refers to a process in which the web part of the material to be formed is bent and formed on the subsequent roll stand with respect to the previous roll stand while being displaced in the opposite direction to the flanges and lip sides on both sides. . In other words, in the normal forming method in which the flange part is raised up against the web part, the position of the web part is lowered sequentially from B, C, D, and E as shown in Fig. 5. be.
すなわち本発明においては、リツプ側を凹とす
る方向の湾曲を有する成形品を得るために、リツ
プ部側を構成する帯板部分に縁伸び変形を抑制す
るようにダウンヒル成形を行ない、その後アツプ
ヒル成形を行なう構成をなしておればよく、ロー
ル軸の方向等に拘束されるものではない。 That is, in the present invention, in order to obtain a molded product having a curve in a direction in which the lip side is concave, downhill molding is performed on the band plate portion constituting the lip side so as to suppress edge elongation deformation, and then uphill molding is performed. It is sufficient to have a configuration that performs the following, and is not limited to the direction of the roll axis or the like.
第３図ｂ、第４図ａ，ｂ，ｃ，ｄ，ｅに示す断
面形状の成形品は、リツプ部に曲げ成形部がある
ためリツプ部が板厚を増加したと同様の効果を生
じてアツプヒルによる長手方向湾曲付与時の長手
方向圧縮力による座屈が防止され、限界曲率半径
を小さくする効果が生ずる。 The molded products with the cross-sectional shapes shown in Figure 3b and Figures 4a, b, c, d, and e have a bending part in the lip part, so the same effect is produced as if the thickness of the lip part were increased. Buckling due to longitudinal compressive force when longitudinal curvature is imparted by uphilling is prevented, resulting in the effect of reducing the critical radius of curvature.
以上説明したごとく、本発明の成形品および曲
げ成形法を使用することにより次に示す効果があ
る。
As explained above, the following effects can be obtained by using the molded product and bending method of the present invention.
(1) 成形品の局部塑性座屈限界応力を高くするこ
とができ、成形品のリツプ側が凹、ウエブ側が
凸となる長手方向の湾曲の曲率を大きくするこ
とができる。また同一曲率の湾曲を有する成形
品においては、より薄い帯板の成形を可能とす
る。(1) The local plastic buckling limit stress of the molded product can be increased, and the curvature of the molded product in the longitudinal direction can be increased so that the lip side is concave and the web side is convex. Furthermore, in a molded product having curvature of the same curvature, it is possible to mold a thinner strip.
(2) 成形品の局部塑性座屈限界応力を高くするこ
とができるので、座屈のない品質安定な成形品
を得ることができる。(2) Since the local plastic buckling limit stress of the molded product can be increased, a molded product with stable quality and no buckling can be obtained.
(3) 成形品のリツプ部を構成する帯板部分に溝、
折り返し、先端折り曲げ等の成形をし、その後
ダウンヒル成形、アツプヒル成形することによ
り、成形品のリツプ部の局部塑性座屈限界応力
を高め、該リツプ側が凹、ウエブ側が凸となる
長手方向に一定の曲率をもつた成形品を安定良
く、高能率に成形できる。(3) Grooves,
By performing forming such as folding back and bending the tip, and then downhill forming and uphill forming, the local plastic buckling limit stress of the lip part of the molded product is increased, and the lip side is concave and the web side is convex. Molded products with curvature can be molded stably and with high efficiency.
第１図および第２図は、従来方法における欠陥
を示すロール成形品の斜視図、第３図ａ，ｂは
各々長手方向に一定の曲率をした成形品の側面図
および断面図、第４図ａ〜ｅは本発明成形品の一
実施例を示す断面模式図、第５図は本発明の一実
施例を示す正面図、第６図は本発明を適用した帯
板の形状を示す断面模式図、第７図は成形品リツ
プ部に溝加工する溝付ロールの断面図である。
４：リツプ部、５：フランジ部、６：ウエブ
部、７：帯板、No.１〜No.７：ロールスタンド、
Ｒ：成形品の曲率半径、３７，３８：上ロール、
３９，４０：下ロール、４５，４６：突起、４
７，４８：溝部。
Figures 1 and 2 are perspective views of a roll-formed product showing defects in the conventional method, Figures 3a and b are side views and cross-sectional views of a molded product with a constant curvature in the longitudinal direction, respectively, and Figure 4 a to e are schematic cross-sectional views showing one embodiment of the molded product of the present invention, FIG. 5 is a front view showing one embodiment of the present invention, and FIG. 6 is a schematic cross-sectional view showing the shape of a strip to which the present invention is applied. 7 are cross-sectional views of a grooved roll for forming grooves on the lip of a molded product. 4: Rip part, 5: Flange part, 6: Web part, 7: Band plate, No. 1 to No. 7: Roll stand,
R: radius of curvature of molded product, 37, 38: upper roll,
39, 40: Lower roll, 45, 46: Protrusion, 4
7, 48: Groove.
Claims (1)
り曲げ等の成形部を有し、全体がＣ形類似形であ
り、かつ長手方向に前記リツプ側を凹、ウエブ側
を凸とする方向の湾曲を有する、帯板素材からロ
ール成形法により製したことを特徴とする形材成
形品。 ２ 多数のロールスタンドを経て、帯板より断面
形状がＣ形類似形であり、かつ長手方向にリツプ
側を凹、ウエブ側を凸とする方向の湾曲を有する
形状に曲げ成形する方法であつて、単数段または
ロールスタンドの成形接触点の高さがほぼ同一で
ある複数段のロールスタンドにより、被成形材の
最終製品で前記リツプ部となる部分に、溝、折り
返し、先端折り曲げ等の曲げ成形部を形成する成
形第１工程と、該工程後、ダウンヒル成形法であ
り、ウエブの両縁部の曲げコーナーを曲げ成形す
る複数段のロールスタンドによる成形第２工程
と、該成形第２工程後、リツプ側を凹、ウエブ側
を凸とする長手方向湾曲を付与するアツプヒルに
よる成形第３工程からなることを特徴とする形材
成形品の成形方法。[Scope of Claims] 1. The cross-sectional shape has a molded part such as a groove, a folded back, and a bent tip at the lip part, and the overall shape is similar to a C shape, and in the longitudinal direction, the lip side is concave and the web side is convex. 1. A shaped product having a curvature in the direction of , which is manufactured from a strip material by a roll forming method. 2. A method of bending and forming a strip plate through a number of roll stands into a shape similar to a C-shape in cross-section and curved in the longitudinal direction such that the lip side is concave and the web side is convex. , by using a single stage or multiple roll stands whose forming contact points are approximately the same height, the part of the material to be formed that will become the lip in the final product is subjected to bending such as grooves, folds, and tip bends. After this step, there is a downhill forming method using a multi-stage roll stand to bend and form the bending corners of both edges of the web, and after the second forming step. . A method for forming a shaped product, comprising a third step of forming by uphilling to give a longitudinal curvature with a concave side on the lip side and a convex side on the web side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15510076A JPS5380722A (en) | 1976-12-24 | 1976-12-24 | Shape steel and method of bending |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15510076A JPS5380722A (en) | 1976-12-24 | 1976-12-24 | Shape steel and method of bending |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5380722A JPS5380722A (en) | 1978-07-17 |
| JPS6215694B2 true JPS6215694B2 (en) | 1987-04-08 |
Family
ID=15598617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15510076A Granted JPS5380722A (en) | 1976-12-24 | 1976-12-24 | Shape steel and method of bending |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5380722A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62166026A (en) * | 1986-01-14 | 1987-07-22 | Hitachi Metals Ltd | Roll forming method |
| JP2011256548A (en) * | 2010-06-07 | 2011-12-22 | Asahi Kasei Homes Co | Ceiling structure |
-
1976
- 1976-12-24 JP JP15510076A patent/JPS5380722A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5380722A (en) | 1978-07-17 |
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