JPS63123532A - Forming method for section roll - Google Patents
Forming method for section rollInfo
- Publication number
- JPS63123532A JPS63123532A JP26749086A JP26749086A JPS63123532A JP S63123532 A JPS63123532 A JP S63123532A JP 26749086 A JP26749086 A JP 26749086A JP 26749086 A JP26749086 A JP 26749086A JP S63123532 A JPS63123532 A JP S63123532A
- Authority
- JP
- Japan
- Prior art keywords
- roll
- stage
- forming
- forming method
- strip
- 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
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000005452 bending Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 8
- 238000009826 distribution Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 238000011084 recovery Methods 0.000 description 3
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
Landscapes
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明はロール成形によって形材を形成するセクション
ロール成形方法に関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a section roll forming method for forming a section by roll forming.
〈従来技術〉
任意の断面形状を有する長尺の薄板形材は、一般に多段
のロールセットに帯板を連続的に通すことによってロー
ル間隙間で形成される断面形状に帯板を成形するセクシ
シンロール成形法が使用されている。<Prior art> A long thin sheet material having an arbitrary cross-sectional shape is generally manufactured using a sexing process in which the strip is continuously passed through a multi-stage roll set to form the strip into the cross-sectional shape formed by the gap between the rolls. Roll forming method is used.
代表的な成形過程の一例を第４図に示す。An example of a typical molding process is shown in FIG.
図示のように、成形過程で帯板１は各コーナ部で主とし
て曲げ変形を受ける。As shown in the figure, the strip 1 undergoes bending deformation mainly at each corner during the forming process.
〈発明が解決しようとする問題点〉
帯板１の曲げ変形においては、帯板１の弾性的性質に起
因して、成形力を解除すると第５図に示すようなスプリ
ングバックと称する弾性回復が起る。帯板１の厚さをり
２、帯板１中心の曲率半径をρ。とじ、帯板１の弾性率
をＥ１塑性変形特性をσ＝Ｆ・ε″（σ：応力、ε：ひ
ずみ、ｎ：加工硬化係数、Ｆ：１ｌｉｉ性係数）で表わ
すと、スプリングバック量Δθ／θは次式で表わす乙と
ができろ。<Problems to be Solved by the Invention> During bending deformation of the strip 1, due to the elastic properties of the strip 1, when the forming force is released, an elastic recovery called springback as shown in FIG. 5 occurs. It happens. The thickness of the strip 1 is 2, and the radius of curvature at the center of the strip 1 is ρ. When the elastic modulus of the binding and strip plate 1 is expressed as E1 plastic deformation characteristic as σ=F・ε'' (σ: stress, ε: strain, n: work hardening coefficient, F: 1lii coefficient), the springback amount Δθ/ θ can be expressed by the following formula.
この結果、帯板１の各コーナにおいてΔθなろ角度変化
が生じ、例えば成形された帯板１の内側幅にΔωの変化
が生じて成形品の加工精度が悪化する。As a result, an angle change of Δθ occurs at each corner of the strip plate 1, and for example, a change of Δω occurs in the inner width of the molded strip plate 1, deteriorating the processing accuracy of the molded product.
この問題は、帯板１の材料の弾性的性質に起因する本質
的な問題であり、材質を同一としても板ＪＦＪｔや曲率
半径ρ。の影響も受け、高精度形材を製作する上での大
きな障害要因となっていた。尚、ロールは回転体である
ため、スプリングバック分を見込んだオーバベンド方式
は原理的に受用できない。This problem is essentially caused by the elastic properties of the material of the strip plate 1, and even if the material is the same, the plate JFJt and the radius of curvature ρ. This was a major hindrance to the production of high-precision shapes. Note that since the roll is a rotating body, an overbend method that takes into account springback cannot be used in principle.
本発明は上記状況に鑑みてなされたもので、スプリング
バックが発生しないセクションロール成形方法を提供す
ることを目的とする。The present invention has been made in view of the above situation, and an object of the present invention is to provide a section roll forming method in which springback does not occur.
く問題点を解決するための手段〉
上記目的を達成するための本発明方法は、多段のロール
セットに薄板材を連続的に通板することによりロール間
隙間で形成されろ断面形状に薄板材を成形するセクショ
ンロール成形方法において、ロールスタンド間合てでも
しくは最終段とその前段との間で、前段側ロールによる
成形高さよりも後段側ロールの成形高さを小さくして成
形することを特徴とし、成形品の側壁部に圧縮変形を与
えるようにする。Means for Solving the Problems〉 The method of the present invention for achieving the above object is to continuously pass a thin sheet material through a multi-stage roll set to form a thin sheet material with a cross-sectional shape formed by the gaps between the rolls. In the section roll forming method for forming, the forming height of the subsequent roll is smaller than the forming height of the previous roll between the roll stands or between the final stage and the previous stage. and compressive deformation is applied to the side wall of the molded product.
く実 施 例〉
第１図には本発明方法を実施するロールの縦断面図、第
２図には成形後の帯板の 正面図、第３図（ａ）には単
純曲げ加工による成形帯板曲げ部の応力分布図、第３図
（ｂ）には圧縮力が付加された成形帯板曲げ部の応力分
布図、第３図ｔｃ＋には帯板の応力−ひずみ線図を示し
である。Practical Examples Fig. 1 is a longitudinal cross-sectional view of a roll for carrying out the method of the present invention, Fig. 2 is a front view of a strip after forming, and Fig. 3 (a) is a formed band formed by simple bending. Figure 3(b) is a stress distribution diagram of the bent part of the plate, and Figure 3(b) is a stress distribution diagram of the bent part of the formed strip to which compressive force is applied, and Figure 3 (tc+) is the stress-strain diagram of the strip. .
第１図において、１１は帯板であり、１２は上部（オス
型）ロール、１３は下部（メス型）ロールを示しである
。第１図（ｂｌに示したロールは１段目であり、第１図
（ａｌに示したロールは（ｉ−１）段目であり、１段目
と（ｉ−１）段目にはΔＩ（の成形高さの差がある。つ
まり帯板１１は前段側（１段目）ロールで成形された後
、後段側（ｌ−１段目）ロールで成形されろ際、ΔＨの
圧縮変形を受けろことになる（第２図参照）。In FIG. 1, 11 is a strip plate, 12 is an upper (male type) roll, and 13 is a lower (female type) roll. The roll shown in Figure 1 (bl) is the first stage, the roll shown in Figure 1 (al) is the (i-1) stage, and the first stage and (i-1) stage There is a difference in the forming height of You should take it (see Figure 2).
圧縮変形を受けた場合、外表面側及び内表面側共に圧縮
応力状態になり、外表面側では曲率半径を小さくするよ
うな弾性回復（εｅ／）が作用し、全体のスプリングバ
ックは著しく減少する（第３図（ｂｌ （ｅｌ参照）。When subjected to compressive deformation, both the outer and inner surfaces enter a compressive stress state, and elastic recovery (εe/) acts on the outer surface to reduce the radius of curvature, significantly reducing the overall springback. (See Figure 3 (bl (el)).
これに対し単純曲げだけの場合は、外表面の引張応力側
及び内表面の圧縮応力側共に弾性回復量（εｅ１゜５ｅ
２）は曲率半径を太き（作用する（第３図（ａｌ （ｃ
）参照）。On the other hand, in the case of simple bending, the amount of elastic recovery (εe1゜5e
2) increases the radius of curvature (acts (Fig. 3) (al (c
)reference).
従って、前段側ロールによる成形高さよりも後段側ロー
ルの成形高さを小さくして圧縮力を付加して成形するこ
とにより、スプリングバックを著しく減少させることが
可能である。尚、成形高さを小さくする場合、最終段と
その前段との間だけで行なうようにすることも可能であ
る。Therefore, by making the forming height of the rear roll smaller than the forming height of the front roll and applying compressive force during molding, it is possible to significantly reduce springback. In addition, when reducing the molding height, it is also possible to perform the molding only between the final stage and the preceding stage.
〈発明の効果〉
本発明のセクションロール成形方法は、前段側ロールに
よる成形高さよりも後段側ロールの成形高さを小さくし
て成形するようにしたので、成形品の側壁部に圧縮力が
付加されてスプリングバックが著しく減少する。その結
果、セクシ冨ンロール成形品の精度向上が図れる。<Effects of the Invention> In the section roll forming method of the present invention, the forming height of the rear roll is made smaller than the forming height of the front roll, so compressive force is not applied to the side wall of the molded product. springback is significantly reduced. As a result, the precision of the sexy roll molded product can be improved.
第１図は本発明方法を実施するロールの縦断面図、第２
図は成形後の帯板の と面図、第３図（ａｌは単純曲げ
加工による成形帯板曲げ部の応力分布図、第３図（ｂ）
は圧縮力が付加された成形帯板曲げ部の応力分布図、第
３図（Ｃ）は帯板の応力−ひすみ線図、第４図はロール
成形過程を表わす概念図、第５図は成形品のスプリング
バックを説明する概略図である。
図 面 中、
１１は帯板、
１２は上部ロール、
１３は下部ロールである。Figure 1 is a longitudinal sectional view of a roll for carrying out the method of the present invention;
The figure is a cross-sectional view of the strip after forming, and FIG. 3 (al is a stress distribution diagram of the bent part of the formed strip by simple bending.
is a stress distribution diagram of the bent part of the formed strip to which compressive force is applied, FIG. 3 (C) is a stress-strain diagram of the strip, FIG. 4 is a conceptual diagram showing the roll forming process, and FIG. FIG. 3 is a schematic diagram illustrating springback of a molded product. In the drawings, 11 is a strip, 12 is an upper roll, and 13 is a lower roll.
Claims (1)
よりロール間隙間で形成される断面形状に薄板材を成形
するセクションロール成形方法において、ロールスタン
ド間全てでもしくは最終段とその前段との間で、前段側
ロールによる成形高さよりも後段側ロールの成形高さを
小さくして成形することを特徴とするセクションロール
成形方法。In the section roll forming method, which forms a thin sheet material into a cross-sectional shape formed by the gap between the rolls by continuously passing the sheet material through a multi-stage roll set, the sheet material is formed between all the roll stands or between the last stage and the previous stage. A section roll forming method characterized in that forming is performed by making the forming height of a rear roll smaller than the forming height of a front roll.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26749086A JPH07121422B2 (en) | 1986-11-12 | 1986-11-12 | Section roll molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26749086A JPH07121422B2 (en) | 1986-11-12 | 1986-11-12 | Section roll molding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63123532A true JPS63123532A (en) | 1988-05-27 |
| JPH07121422B2 JPH07121422B2 (en) | 1995-12-25 |
Family
ID=17445572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26749086A Expired - Lifetime JPH07121422B2 (en) | 1986-11-12 | 1986-11-12 | Section roll molding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07121422B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106391874A (en) * | 2015-11-16 | 2017-02-15 | 安徽省凌锋冶金机械有限公司 | Floor heating pipeline groove forming method |
-
1986
- 1986-11-12 JP JP26749086A patent/JPH07121422B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106391874A (en) * | 2015-11-16 | 2017-02-15 | 安徽省凌锋冶金机械有限公司 | Floor heating pipeline groove forming method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07121422B2 (en) | 1995-12-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |