JPS6317158B2 - - Google Patents
Info
- Publication number
- JPS6317158B2 JPS6317158B2 JP2539481A JP2539481A JPS6317158B2 JP S6317158 B2 JPS6317158 B2 JP S6317158B2 JP 2539481 A JP2539481 A JP 2539481A JP 2539481 A JP2539481 A JP 2539481A JP S6317158 B2 JPS6317158 B2 JP S6317158B2
- Authority
- JP
- Japan
- Prior art keywords
- inner cylinder
- outer cylinder
- cylinder
- thermal expansion
- roll
- 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
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 239000010410 layer Substances 0.000 description 17
- 230000035515 penetration Effects 0.000 description 9
- 238000003466 welding Methods 0.000 description 9
- 238000003825 pressing Methods 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 229910001018 Cast iron Inorganic materials 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000009750 centrifugal casting Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
Landscapes
- Rolls And Other Rotary Bodies (AREA)
- Paper (AREA)
Description
【発明の詳細な説明】
本発明は抄紙機業界で要望されている二層ロー
ルを容易、確実、かつ安価に組立てることのでき
る新規な製作方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a novel manufacturing method that allows for easy, reliable, and inexpensive assembly of the two-layer rolls desired in the paper machine industry.
第１図は、本法の適用対象の１つとなる二層ロ
ールの縦断面を示すが、同図で０１は外筒、０２
は内筒をそれぞれ示す。このような二層ロール
は、一般にロール外周面が腐食性物質に接触する
場合に利用されることが多いため、外筒０１の厚
さt1は、コストを含めた考慮から、できるだけ薄
くしたいわけであるが、そうすると真円度の高い
円筒を作ることが困難であるという問題点があ
る。すなわち、薄肉円筒の製作方法として現在一
般に行なわれているのは、板を曲げ加工後、長手
溶接によつて作る方法が採用されているが、その
ままの状態では、焼きばめなどを行なうほどの真
円度は、板曲げ精度及び長手溶接に起因する変形
のために出せないので、製作後に内外面の機械加
工を行なわなければならず、そのためコストアツ
プを招くばかりでなく、該薄肉円筒の機械加工時
にも、その真円度を保つて保持することも容易で
ないなどの問題点がある。 Figure 1 shows a vertical cross section of a two-layer roll to which this method is applied. In the figure, 01 is an outer cylinder, 02
indicates the inner cylinder. Such two-layer rolls are generally used when the roll outer peripheral surface comes into contact with corrosive substances, so the thickness t1 of the outer cylinder 01 should be made as thin as possible from considerations including cost. However, this poses a problem in that it is difficult to produce a cylinder with high roundness. In other words, the current method of manufacturing thin-walled cylinders is to bend a plate and then longitudinally weld it. Since roundness cannot be achieved due to plate bending accuracy and deformation caused by longitudinal welding, the inner and outer surfaces must be machined after fabrication, which not only increases costs but also requires machining of the thin-walled cylinder. Sometimes, there is a problem that it is not easy to maintain the roundness.
また、外筒０１と内筒０２とを組立てるための
焼きばめによる組立て作業中の取扱い時に、薄肉
の外筒０１の真円度を保持することは困難である
という問題点がある。 Further, there is a problem in that it is difficult to maintain the roundness of the thin outer cylinder 01 during handling during the assembly operation by shrink fitting for assembling the outer cylinder 01 and the inner cylinder 02.
上記のような実情から、ゴム巻きのない抄紙機
用ロールについては、未だ二層ロールの製作方法
が確立されていないため、目下のところ、遠心鋳
造法によるステンレス鋼の単層ロールが使用され
ているが、コスト、鋳造欠陥による耐食性低下及
び内面側に接するアルミシユーとの焼付性等の面
から、内、外筒の二層ロールの製作方法の確立が
抄紙機業界で要望されている。 Due to the above-mentioned circumstances, for paper machine rolls without rubber wrapping, a method for manufacturing double-layer rolls has not yet been established, so single-layer stainless steel rolls made by centrifugal casting are currently being used. However, from the viewpoints of cost, reduction in corrosion resistance due to casting defects, and seizure resistance with the aluminum shell that is in contact with the inner surface, there is a desire in the paper machine industry to establish a method for manufacturing a double-layer roll with an inner and outer cylinder.
本発明は、かかる業界の要望に応えることの可
能な抄紙機用二層ロールの製作方法を実現するこ
とを目的として提案されたもので、熱膨脹係数が
異なる材料からなる内筒と外筒とを組立てて抄紙
機用二層ロールを製作するに当り、外筒の熱膨脹
係数が内筒のそれよりも大きい場合には、常温よ
り高い温度雰囲気内で、また、その逆に小さい場
合には、常温よりも低い温度雰囲気内で外筒を内
筒に巻きつけて組立てることを特徴とする抄紙機
用二層ロールの製作方法に係るものである。 The present invention was proposed with the aim of realizing a method for manufacturing a two-layer paper machine roll that can meet the demands of the industry, and includes an inner cylinder and an outer cylinder made of materials with different coefficients of thermal expansion. When assembling to produce a double-layer roll for a paper machine, if the coefficient of thermal expansion of the outer cylinder is larger than that of the inner cylinder, it will be placed in an atmosphere at a temperature higher than room temperature, and vice versa, if it is smaller, it will be placed at room temperature. This relates to a method for manufacturing a two-layer roll for a paper machine, which is characterized in that the outer cylinder is assembled by winding the outer cylinder around the inner cylinder in an atmosphere at a temperature lower than that of the present invention.
本発明方法は、上記構成よりなり、熱膨脹係数
を異にする材料からなる内筒と外筒とを組立てる
に当り、常温より高い温度下、または常温より低
い温度下で行なわれるため、それら両筒の組立て
作業が容易で、また、組立て後両筒が常温に復帰
した状態では、両筒の熱膨脹差により、所望の締
付力で一体化された二層ロールが容易に得られ
る。 The method of the present invention has the above-mentioned configuration, and when assembling the inner cylinder and the outer cylinder made of materials with different coefficients of thermal expansion, it is carried out at a temperature higher than room temperature or at a temperature lower than room temperature. The assembly work is easy, and when both cylinders return to room temperature after assembly, a two-layer roll integrated with a desired tightening force can be easily obtained due to the difference in thermal expansion between the cylinders.
以下、第２図および第３図Ａ，Ｂ，Ｃを参照し
ながら本発明につき具体的に説明する。 The present invention will be specifically described below with reference to FIG. 2 and FIGS. 3A, B, and C.
第２図において、１は所定の外径を有するよう
に、遠心鋳造法などで鋳造された鋳鉄製内筒で、
同内筒１は図示省略の適宜な回転支持装置によ
り、所定位置に支持された状態で、所定の方向
（矢印ａ方向）へ、所定の速度で回転される。２a
は該内筒１の外周面上にスパイラル状に隙間なく
巻きつけられて薄肉外筒２を形成する帯状板で、
同帯状板２aは、内筒１の材質より熱膨脹係数が
大きいステンレス鋼よりなり、図示省略の巻取機
等から所定の張力ｂを付与された状態で繰り出さ
れ、内筒１の半径方向への押し付けロール３と、
軸方向への押し付けロール４とにより、内筒１の
外周面上に圧着されながら、かつ相隣る端面が圧
接されながら巻きつけられて、熱膨脹係数の大き
な薄肉外筒２と、熱膨脹係数の小さな内筒１から
なる二層ロールが形成される。この場合、内筒１
及び帯状体２aで形成される外筒２は、常温より
高い温度の雰囲気に置かれる。従つて上記の如く
形成された二層ロールが、常温に復帰すると、外
筒２と内筒１の熱膨脹差によつて生じる外筒２の
内筒１に対する円周方向の締めつけ応力によつ
て、自動的に一体化した二層ロールが得られる。 In Fig. 2, 1 is a cast iron inner cylinder cast by centrifugal casting to have a predetermined outer diameter.
The inner cylinder 1 is rotated in a predetermined direction (direction of arrow a) at a predetermined speed while being supported at a predetermined position by an appropriate rotation support device (not shown). 2 a
is a band-shaped plate that is wound spirally on the outer peripheral surface of the inner cylinder 1 without any gaps to form the thin outer cylinder 2;
The strip plate 2 a is made of stainless steel, which has a higher coefficient of thermal expansion than the material of the inner cylinder 1 , and is unwound from a winding machine (not shown) under a predetermined tension b, and extends in the radial direction of the inner cylinder 1 . a pressing roll 3;
The axially pressing roll 4 wraps the inner cylinder 1 while being pressed onto the outer circumferential surface of the inner cylinder 1 while pressing the adjacent end faces to form a thin outer cylinder 2 with a large coefficient of thermal expansion and a thin outer cylinder 2 with a small coefficient of thermal expansion. A two-layer roll consisting of an inner cylinder 1 is formed. In this case, inner cylinder 1
The outer cylinder 2 formed by the belt-shaped body 2 a is placed in an atmosphere at a temperature higher than normal temperature. Therefore, when the two-layer roll formed as described above returns to room temperature, due to the tightening stress of the outer cylinder 2 against the inner cylinder 1 in the circumferential direction caused by the difference in thermal expansion between the outer cylinder 2 and the inner cylinder 1, An automatically integrated two-layer roll is obtained.
いま、板厚t1の内筒１に板厚t2の帯状板２ａを
常温T0より高い温度Ｔに保つて巻きつけて外筒
２を形成するとき、内筒１、外筒２の熱膨脹係数
をα1，α2外筒のヤング率をＥとすると、外筒２に
生ずる円周方向の締めつけ応力σは、近似的につ
ぎの式で求められる。（ただしt1＞＞t2）
σ＝（α2−α1）（Ｔ―T0）E2
ここで、外筒２の材質を、SUS304、内筒のそ
れを鋳鉄とすると、α2＝18×10-6０−１Ｃ、α1＝10
×10-6０−１Ｃ、E2＝２×104Kg／mm2であるから、
一般式に与えられている締めつけ応力σを10Kg／
mm2とすると内筒１及び外筒２に対する必要な加熱
温度Ｔ―T0は、上記式から、
Ｔ―T0＝σ／E2（α2―α1）
＝10／２×104×（18―10）×10-6＝63℃
となる。なお、内筒１と外筒２間ガタがある場合
には、余裕をみて該加温度を適宜設定すればよ
い。 Now, when forming the outer cylinder 2 by wrapping the strip plate 2a with a thickness t 2 around the inner cylinder 1 with a thickness t 1 while maintaining the temperature T higher than the room temperature T 0 , the thermal expansion of the inner cylinder 1 and the outer cylinder 2 When α 1 is the coefficient and E is the Young's modulus of the outer cylinder 2 , the tightening stress σ in the circumferential direction generated in the outer cylinder 2 can be approximately determined by the following formula. (However, t 1 >> t 2 ) σ=(α 2 −α 1 )(T−T 0 )E 2Here , assuming that the material of the outer cylinder 2 is SUS304 and that of the inner cylinder is cast iron, α 2 = 18×10 -6 0-1C, α 1 = 10
×10 -6 0-1C, E 2 = 2 × 10 4 Kg/mm 2 , so
The tightening stress σ given in the general formula is 10Kg/
mm 2 , the required heating temperature T-T 0 for the inner cylinder 1 and outer cylinder 2 is calculated from the above formula as follows: T-T 0 =σ/E 2 (α 2 - α 1 ) = 10/2×10 4 × (18−10)×10 -6 = 63℃. Note that if there is play between the inner cylinder 1 and the outer cylinder 2, the heating temperature may be set appropriately with a margin.
また、内筒１の熱膨脹係数が大で、外筒２の熱
膨脹係数が小である場合は、外筒２を形成する帯
状板２aの内筒１外周面上への巻付け作業は、常
温より低い温度の雰囲気内で行なえば、上記と同
様の作用で、一体化した二層ロールが容易に得ら
れる。 In addition, if the coefficient of thermal expansion of the inner cylinder 1 is large and the coefficient of thermal expansion of the outer cylinder 2 is small, the work of wrapping the strip plate 2 a forming the outer cylinder 2 onto the outer peripheral surface of the inner cylinder 1 is performed at room temperature. If carried out in an atmosphere at a lower temperature, an integrated two-layer roll can be easily obtained with the same effect as above.
なお、帯状板２ａの内筒１外周面へ巻き付け
時、または巻きつけ後、第３図Ａ，Ｂ，Ｃに示す
ように、相隣る帯状板２ａの端面が溶接６，７，
９されて外筒２が一体的に形成される。ただし腐
食環境が厳しくない場合は、該溶接を行なう必要
がない。第３図Ａの溶接部６は帯状板２ａ下部に
溶込み不足を有する場合で、この溶接構造は内筒
１への溶込みをきらい、かつ強度上溶込み不足が
許容される場合採用され、また、第３図Ｂの溶接
部７の構造は、強度の点から溶込不足は望ましく
ないが、内筒１への溶込みが許容される場合に採
用される。なおまた、第３図Ｃの溶接部９構造
は、溶込み不足も、内筒１への溶込みも許容され
ない場合に採用される。この場合、溶込み不足を
なくし、かつ内筒１への溶込みを防止するため
に、帯状板２ａと同材質の帯板８が、溶接部９下
部に図示の如く設置される。 Note that when or after winding the strip plate 2a around the outer peripheral surface of the inner cylinder 1, the end surfaces of the adjacent strip plates 2a are welded 6, 7, 7, as shown in FIGS. 3A, B, and C.
9, and the outer cylinder 2 is integrally formed. However, if the corrosive environment is not severe, there is no need to perform this welding. The welded part 6 in FIG. 3A is a case where there is insufficient penetration in the lower part of the strip plate 2a, and this welding structure is adopted when penetration into the inner cylinder 1 is avoided and insufficient penetration is acceptable from the viewpoint of strength, Further, the structure of the welded portion 7 shown in FIG. 3B is adopted when insufficient penetration is undesirable from the viewpoint of strength, but penetration into the inner cylinder 1 is permitted. Furthermore, the structure of the welded portion 9 shown in FIG. 3C is employed when neither insufficient penetration nor penetration into the inner cylinder 1 is permitted. In this case, in order to eliminate insufficient penetration and to prevent penetration into the inner cylinder 1, a strip plate 8 made of the same material as the strip plate 2a is installed below the welded portion 9 as shown in the figure.
つぎに、第４図Ａ，Ｂ，Ｃ，Ｄ，Ｅ，Ｆ，Ｇを
参照しながら、本発明の他の実施態様につき説明
する。第４図Ａに示す如き、板状のステンレス鋼
板１２ａを適宜の折曲げ装置（図示せず）によ
り、第４図Ｂに示す如く管状に形成し、該管状ス
テンレス鋼管１２′ａを、遠心鋳造法などで鋳造
された第４図Ｃに示す如き鋳鉄製内筒１１の外周
に第４図Ｄに示すように嵌め込み、ついで該管１
２′ａの一側縁部を溶接１６などにより固定した
のち、内筒１１の両端にヘツド１３を取付け、上
記の場合と同様に、常温より高い温度の雰囲気内
で電動機１７によつて該内筒１１を所定方向へ所
定速度で回転せしめながら、軸受１５によつて押
し付け力を付加される押し付け用ロール１４で、
該管１２′ａを内筒１１側へ第４図Ｆに示す如く
押し付けて、内筒１１との間に隙間のない外筒１
８を形成する。ついで該外筒１８の両端縁を溶接
手段１９で溶接して固定し、二層ロールを得る。
（第４図Ｇ参照）なお本例の場合、外筒１８の溶
接手段１９による溶接は、高温下で行なわれる。 Next, other embodiments of the present invention will be described with reference to FIGS. 4A, B, C, D, E, F, and G. A plate-shaped stainless steel plate 12a as shown in FIG. 4A is formed into a tubular shape as shown in FIG. 4B using an appropriate bending device (not shown), and the tubular stainless steel pipe 12'a is centrifugally cast. The tube 1 is fitted into the outer periphery of the cast iron inner tube 11 as shown in FIG. 4C, which has been cast by a method such as that shown in FIG.
After one side edge of 2'a is fixed by welding 16 or the like, heads 13 are attached to both ends of the inner cylinder 11, and the inner cylinder 11 is heated by the electric motor 17 in an atmosphere at a temperature higher than room temperature, as in the case above. While rotating the tube 11 in a predetermined direction at a predetermined speed, a pressing roll 14 is applied with a pressing force by a bearing 15,
The tube 12'a is pressed against the inner cylinder 11 side as shown in FIG.
form 8. Then, both ends of the outer cylinder 18 are welded and fixed by a welding means 19 to obtain a two-layer roll.
(See FIG. 4G) In this example, welding of the outer cylinder 18 by the welding means 19 is performed at high temperature.
以上要するに本発明は、熱膨脹係数が異なる材
料からなる内筒と外筒とを組立てて抄紙機用二層
ロールを製作するに当り、外筒の熱膨脹係数が内
筒のそれよりも大きい場合には、常温より高い温
度雰囲気内で、また、その逆に小さい場合には、
常温よりも低い温度雰囲気内で外筒を内筒に巻き
つけて組立てることを要旨とするものであるか
ら、本発明によれば、業界で要望されている抄紙
機用二層ロールを、低コストで容易に製作できる
という実用的効果を挙げることができる。 In summary, the present invention provides a method for producing a two-layer roll for a paper machine by assembling an inner cylinder and an outer cylinder made of materials with different coefficients of thermal expansion, and when the coefficient of thermal expansion of the outer cylinder is larger than that of the inner cylinder, , in an atmosphere with a temperature higher than room temperature, or vice versa, if it is small,
Since the gist of the present invention is to assemble the outer cylinder by winding it around the inner cylinder in an atmosphere at a temperature lower than room temperature, the present invention can provide a two-layer roll for paper machines, which is desired in the industry, at a low cost. It has the practical effect of being easy to manufacture.
第１図は、本発明の対象である二層ロールの縦
断面図、第２図は本発明の一実施態様の略示的説
明斜視図、第３図Ａ，Ｂ，Ｃはそれぞれ第２図に
おける帯状板の溶接態様例説明図、第４図Ａ，
Ｂ，Ｃ，Ｄ，Ｅ，Ｆ，Ｇは、本発明の他の実施態
様の工程順説明図である。
１，１１：内筒、２，１８：外筒、２a：帯状
板、３，４，１４：押し付けロール、６，７，
９：溶接部。
FIG. 1 is a longitudinal sectional view of a two-layer roll that is the object of the present invention, FIG. 2 is a schematic explanatory perspective view of an embodiment of the present invention, and FIGS. 3A, B, and C are respectively FIGS. An explanatory diagram of an example of welding of a strip plate in FIG. 4A,
B, C, D, E, F, and G are step-by-step explanatory diagrams of other embodiments of the present invention. 1, 11: Inner cylinder, 2, 18: Outer cylinder, 2 a : Band plate, 3, 4, 14: Pressing roll, 6, 7,
9: Welding part.
Claims (1)
とを組立てて抄紙機用二層ロールを製作するに当
り、外筒の熱膨脹係数が内筒のそれよりも大きい
場合には、常温より高い温度雰囲気内で、また、
その逆に小さい場合には、常温よりも低い温度雰
囲気内で外筒を内筒に巻きつけて組立てることを
特徴とする抄紙機用二層ロールの製作方法。1. When assembling an inner cylinder and an outer cylinder made of materials with different coefficients of thermal expansion to produce a two-layer roll for a paper machine, if the coefficient of thermal expansion of the outer cylinder is larger than that of the inner cylinder, the temperature is higher than room temperature. In the atmosphere, also
On the other hand, if the roll is small, the method for manufacturing a two-layer roll for a paper machine is characterized by assembling the outer cylinder around the inner cylinder in an atmosphere at a temperature lower than room temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2539481A JPS57143594A (en) | 1981-02-25 | 1981-02-25 | Fabrication of two-layered roll for papermaking machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2539481A JPS57143594A (en) | 1981-02-25 | 1981-02-25 | Fabrication of two-layered roll for papermaking machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57143594A JPS57143594A (en) | 1982-09-04 |
| JPS6317158B2 true JPS6317158B2 (en) | 1988-04-12 |
Family
ID=12164667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2539481A Granted JPS57143594A (en) | 1981-02-25 | 1981-02-25 | Fabrication of two-layered roll for papermaking machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57143594A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0325460U (en) * | 1989-07-19 | 1991-03-15 |
-
1981
- 1981-02-25 JP JP2539481A patent/JPS57143594A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0325460U (en) * | 1989-07-19 | 1991-03-15 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57143594A (en) | 1982-09-04 |
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