JPH05222579A - Manufacture of electric conductive roll - Google Patents
Manufacture of electric conductive rollInfo
- Publication number
- JPH05222579A JPH05222579A JP5665392A JP5665392A JPH05222579A JP H05222579 A JPH05222579 A JP H05222579A JP 5665392 A JP5665392 A JP 5665392A JP 5665392 A JP5665392 A JP 5665392A JP H05222579 A JPH05222579 A JP H05222579A
- Authority
- JP
- Japan
- Prior art keywords
- sleeve material
- punching
- roll
- base stock
- tube
- 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.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電気めっきに使用する
通電ロール、特に、耐熱合金からなるスリーブ材をロー
ル軸に外嵌させた２ピース構造の通電ロールの製造方法
に関し、更に詳しくは、そのスリーブ材の製法改良に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing an energizing roll used for electroplating, and more particularly to a method for producing an energizing roll having a two-piece structure in which a sleeve material made of a heat-resistant alloy is fitted onto a roll shaft. The present invention relates to an improvement in the manufacturing method of the sleeve material.
【０００２】[0002]
【従来の技術】近年の電気めっき鋼板の普及にともな
い、めっき操業の高速化が図られ、強酸性めっきでの高
速めっきというような通電ロールにとって極めて苛酷な
条件でのめっきも行われるようになった。そのため、通
電ロールの耐久性を高め、その長寿命化を図る研究が各
方面で進められ、構造面からは、耐熱合金からなるスリ
ーブ材をロール軸に外嵌させた２ピース構造が多用され
ている。そして、特開昭６０−９６７８８号公報には、
そのスリーブ材を冷間加工により加工硬化させるスリー
ブ強化法が開示され、また、特開昭６１−１４９４９５
号公報には、エルハルト穿孔−プッシュベンチ押し抜き
で製造したスリーブの組織が、高速めっきでの耐久性に
優れることが記載されている。2. Description of the Related Art With the spread of electroplated steel sheets in recent years, the speed of plating operation has been increased, and plating under extremely severe conditions for current-carrying rolls, such as high-speed plating with strong acid plating, has also been carried out. It was Therefore, research has been conducted in various fields to improve the durability of the energizing roll and extend its life. From the structural point of view, a two-piece structure in which a sleeve material made of a heat-resistant alloy is fitted onto the roll shaft is often used. There is. And, in JP-A-60-96788,
A sleeve strengthening method is disclosed in which the sleeve material is work-hardened by cold working, and is disclosed in JP-A-61-149495.
The publication describes that the structure of the sleeve manufactured by Erhardt punching-pushbench punching has excellent durability in high-speed plating.
【０００３】しかしながら、最近の著しい技術進歩によ
り、これらのスリーブ強化法が単独では充分とは言えな
いレベルまで、電気めっき操業の高速化、操業条件の苛
酷化が進んでおり、その組み合わせが必要になってき
た。エルハルト穿孔−プッシュベンチ押し抜きと冷間加
工硬化とを組み合わせたスリーブの製法は、前記公報の
いずれにも記載されてない。しかし、エルハルト穿孔−
プッシュベンチ押し抜きで製造した例えばＪＩＳ−ＳＵ
Ｓ３０４からなる素管を、冷間加工により加工硬化させ
る高硬度大径継目無鋼管の製造方法は、従来から知られ
ている。この製管方法の主要工程は、次のとおりであ
る。However, due to the recent remarkable technological advances, the electroplating operation has been accelerated and the operating conditions have been severed to such a level that these sleeve strengthening methods alone cannot be said to be sufficient. It's coming. A method for making a sleeve that combines Elhardt perforation-push bench punching and cold work hardening is not described in any of the above publications. But Erhardt Perforation-
For example, JIS-SU manufactured by push bench punching
A method for manufacturing a high-hardness large-diameter seamless steel pipe, in which the raw pipe made of S304 is work-hardened by cold working, has been conventionally known. The main steps of this pipe manufacturing method are as follows.
【０００４】 鋳塊または鋳片を穿孔に適した温度に
加熱する（加熱）。 加熱した素材を、底部を残して穿孔して、底付管と
する（穿孔）。 底付管をプッシュベンチで押し抜く（押し抜き）。 押し抜き管の内外面を覆う黒皮の除去および偏肉の
修正を目的として、内外面を切削または研削する（内外
面加工）。 所要の強度および組織を得るために、内外面加工後
の押し抜き管を固溶化熱処理する（熱処理）。 熱処理後の押し抜き管を冷間加工により加工硬化さ
せる（冷間加工）。The ingot or slab is heated to a temperature suitable for drilling (heating). The heated material is perforated with the bottom left to form a bottomed tube (perforation). Push out the bottomed tube with a push bench (push out). The inner and outer surfaces are cut or ground (inner and outer surface processing) for the purpose of removing the black skin covering the inner and outer surfaces of the punched pipe and correcting uneven thickness. In order to obtain the required strength and structure, the punched tube after the inner and outer surface processing is subjected to solution heat treatment (heat treatment). The heat-treated punched tube is work-hardened by cold working (cold working).
【０００５】[0005]
【発明が解決しようとする課題】このような方法では、
前記ＳＵＳ３０４鋼管は問題なく製造できる。しかし、
電気めっきに使用されるスリーブ材の場合は、最終の冷
間加工の工程で表面に割れ疵が生じ、疵除去の工程を追
加する必要がある。疵除去の工程を追加すると、単に製
造能率が悪化するだけでなく、スリーブ材が薄くなる。
スリーブ材は、削り替えにより繰り返し使用されるが、
その厚みが薄くなると、削り替えの回数が減り、スリー
ブ材の使用期間が短くなる。SUMMARY OF THE INVENTION In such a method,
The SUS304 steel pipe can be manufactured without any problem. But,
In the case of a sleeve material used for electroplating, a crack is generated on the surface in the final cold working step, and it is necessary to add a step for removing the flaw. The addition of the flaw removal step not only deteriorates the manufacturing efficiency but also thins the sleeve material.
The sleeve material is repeatedly used by shaving,
When the thickness is reduced, the number of times of scraping is reduced, and the sleeve material is used for a shorter period.
【０００６】本発明の目的は、エルハルト穿孔−押し抜
き−冷間加工の工程を採用して長寿命のスリーブ材をつ
くる際の、表面疵の発生を防ぎ、しかも、疵防止に伴う
工数の増加がない通電ロールの製造方法を提供すること
にある。An object of the present invention is to prevent the occurrence of surface flaws when making a sleeve material having a long life by adopting the steps of Erhardt punching-punching-cold working, and to increase the number of man-hours for preventing the flaws. It is to provide a method of manufacturing a current-carrying roll that does not have the
【０００７】[0007]
【課題を解決するための手段】電気めっき用通電ロール
のスリーブ材の製造に、エルハルト穿孔−押し抜き−冷
間加工の工程を適用した場合の、スリーブ材表面の割れ
疵については、本発明者らの調査から次のことが判明し
ている。Regarding the cracks on the surface of the sleeve material in the case of applying the process of Elhardt punching-punching-cold working to the production of the sleeve material of the current-carrying roll for electroplating, the inventor of the present invention The following findings have been found from these surveys.
【０００８】この種のスリーブ材としては、ハステロイ
Ｃ−２７６、Ｎｉ−Ｃｒ系高合金等の耐食性に優れた耐
食合金が用いられており、特に、ハステロイＣ−２７６
がその高耐食性の点から多用されている。このハステロ
イＣ−２７６では、金属間化合物を固溶させるために必
要な熱処理温度が１１７０℃程度と高く、このような高
温の加熱が行われると、表面が粒界酸化し、粒界酸化し
た表面をそのまま冷間加工すると、粒界の強度が低下
し、冷間加工時のせん断歪みにより割れ疵を生じる。こ
れが、通電ロール用スリーブ材の製造に、エルハルト穿
孔−押し抜き−冷間加工の工程を適用した場合の、表面
疵の発生原因である。As this type of sleeve material, corrosion resistant alloys having excellent corrosion resistance such as Hastelloy C-276 and Ni-Cr type high alloys are used. In particular, Hastelloy C-276 is used.
Is often used because of its high corrosion resistance. In this Hastelloy C-276, the heat treatment temperature required to form a solid solution with an intermetallic compound is as high as about 1170 ° C., and when such high temperature heating is performed, the surface undergoes grain boundary oxidation, and the surface undergoes grain boundary oxidation. If cold working is carried out as it is, the strength of the grain boundary is lowered, and cracks are generated due to shear strain during cold working. This is a cause of surface defects when the process of Elhardt punching-punching-cold working is applied to the production of the sleeve material for the current-carrying roll.
【０００９】本発明者らは、エルハルト穿孔−押し抜き
−冷間加工の組み合わせを採用し、且つ、工程数を増加
させることなく、スリーブ材表面の割れ疵を防止するこ
とを目的として、工程の見直しを行った。その結果、熱
処理の前に行われていた押し抜き管に対する内外面加工
を熱処理の後に行ない、内外面加工に続けて冷間加工に
よる加工硬化を行えば、冷間加工での表面疵を防止でき
ることが判明した。The present inventors have adopted a combination of Erhardt punching-punching-cold working, and for the purpose of preventing cracking of the sleeve material surface without increasing the number of steps, I reviewed it. As a result, it is possible to prevent surface flaws in cold working by performing inner and outer surface processing on the extruded pipe before heat treatment after heat treatment and performing work hardening by cold working after inner and outer surface processing. There was found.
【００１０】即ち、エルハルト穿孔−押し抜きに不可欠
の内外面加工を、固溶化熱処理の前に行うと、熱処理に
より粒界酸化が生じた表面が冷間加工まで残るが、熱処
理の後に内外面加工を行うと、粒界酸化の生じた表面が
内外面加工で除去され、冷間加工での表面割れが防止さ
れる。そのため、従来どおりの工程数を採用するにもか
かわらず、表面疵のないスリーブ材が得られ、疵除去の
工程が不要になる。That is, when the inner / outer surface processing, which is indispensable for Erhardt punching-pushing, is performed before the solution heat treatment, the surface where grain boundary oxidation occurs due to the heat treatment remains until cold working, but after the heat treatment, the inner and outer surface processing is performed. By this, the surface where grain boundary oxidation has occurred is removed by the inner and outer surface processing, and surface cracking during cold working is prevented. Therefore, although the conventional number of steps is adopted, a sleeve material having no surface flaw can be obtained, and the flaw removing step is unnecessary.
【００１１】本発明はかかる知見に基づきなされたもの
で、スリーブ材をロール軸に外嵌させた２ピース構造の
通電ロールの製造方法において、耐食合金からなる中実
の素材を加熱してエルハルト穿孔により底付管となし、
この底付管を押し抜いた後、その押し抜き管に熱処理を
行って所定の強度および組織を与え、しかる後に、黒皮
除去および偏肉修正のための内外面加工を行ない、更
に、冷間加工により加工硬化を与えてスリーブ材となす
ことを特徴とする通電ロールの製造方法を要旨とする。The present invention has been made on the basis of such findings, and in a method of manufacturing a two-piece structure current-carrying roll in which a sleeve material is externally fitted to a roll shaft, a solid material made of a corrosion-resistant alloy is heated to pierce Elhard's holes. Due to the bottomed tube,
After this bottomed tube is extruded, the extruded tube is heat-treated to give it a predetermined strength and structure, and after that, it is subjected to inner and outer surface processing for removing black skin and correcting uneven thickness, and then cold The gist of the present invention is a method for producing an energizing roll, which is characterized by giving work hardening by working to form a sleeve material.
【００１２】[0012]
【作用】本発明の通電ロールの製造方法が採用するスリ
ーブ材の製法の主要工程を工程順に詳述する。 加熱 所要組成の耐熱合金からなる鋳塊または鋳片をエルハル
ト穿孔に適した温度に加熱する。エルハルト穿孔を適用
される材料は、大型であるので、その加熱は直火炉で行
うのがよい。耐熱合金は穿孔温度も高いので、穿孔のた
めの加熱でも粒界酸化が生じ、これが穿孔および押し抜
きでの疵起点となるおそれがある。そのため、穿孔のた
めの加熱を不活性のシールド雰囲気で行うことが望まれ
る。The main steps of the sleeve material manufacturing method adopted by the method for manufacturing the energizing roll of the present invention will be described in detail in the order of steps. Heating An ingot or slab made of a heat-resistant alloy of the required composition is heated to a temperature suitable for Elhardt drilling. Since the material to which Elhardt drilling is applied is large, it is better to heat it in an open furnace. Since the heat-resistant alloy also has a high piercing temperature, even if heating for piercing, grain boundary oxidation occurs, which may be a flaw starting point in piercing and punching. Therefore, it is desirable to perform the heating for perforation in an inert shield atmosphere.
【００１３】図 1は直火炉でのシールド加熱を例示す
る。１は材料、２は炉床、３は鋼製蓋である。材料１を
鋼製蓋３でおおい、鋼製蓋３の内部を不活性ガスで置換
した後、加熱を行う。このとき、鋼製蓋３内のガス置換
が不充分でも、加熱昇温時の鋼製蓋３の酸化により、鋼
製蓋３内のＯ2 が消費され、材料１の粒界酸化が生じる
温度域では、鋼製蓋３内のフリーなＯ2 は極小となるの
で、粒界酸化は生じない。従って、蓋材としては、鋼材
のような酸化性金属材が好適ということになる。FIG. 1 illustrates shield heating in a direct fire furnace. Reference numeral 1 is a material, 2 is a hearth, and 3 is a steel lid. The material 1 is covered with a steel lid 3, the inside of the steel lid 3 is replaced with an inert gas, and then heating is performed. At this time, even if gas replacement in the steel lid 3 is insufficient, O 2 in the steel lid 3 is consumed by the oxidation of the steel lid 3 during heating and heating, and the temperature at which the grain boundary oxidation of the material 1 occurs. In the region, the free O 2 in the steel lid 3 becomes the minimum, so grain boundary oxidation does not occur. Therefore, an oxidizing metal material such as steel is suitable as the lid material.
【００１４】 穿孔 加熱した材料を例えば堅型プレスのコンテナ内に装入
し、上部からマンドレルを押し込むことにより、材料の
底部を残して穿孔を行う。この場合、スリーブ材に使用
される材料（耐熱合金）の加工性が悪いので、図２に示
すように、材料１のマンドレル４で圧下される面の中央
部に、マンドレル４をセンタリングするためのガイド用
球面凹部５を設けておくのが良い。凹部５の寸法は、マ
ンドレル４の外径をｄ、凹部５の外径Ｄ、凹部５の球面
半径をＲ、凹部の最大深さをＨとして、1.５ｄ＞Ｄ＞
ｄ、２ｄ＞Ｒ＞ｄ、Ｈ＝２０〜１００ｍｍが望ましい。Punching Heated material is loaded into the container of, for example, a hard press, and the mandrel is pushed in from the top, leaving the bottom of the material to be perforated. In this case, since the workability of the material (heat resistant alloy) used for the sleeve material is poor, it is necessary to center the mandrel 4 on the center of the surface of the material 1 which is pressed by the mandrel 4, as shown in FIG. It is preferable to provide the spherical concave portion 5 for guide. The dimensions of the recess 5 are 1.5d>D>, where d is the outer diameter of the mandrel 4, D is the outer diameter of the recess 5, R is the spherical radius of the recess 5, and H is the maximum depth of the recess.
It is desirable that d, 2d>R> d, and H = 20 to 100 mm.
【００１５】 押し抜き 穿孔で得られた底付管を、横型プレスのマンドレルに装
着してダイス中に押し通す。この押し抜きは、順次小径
となる複数のダイスを並べておいて、これらのダイス中
を一気に押し抜く方法と、順次小径となるダイスを１個
ずつ順番に用いる複数回押し抜きの方法とがあるが、い
ずれの方法または両方の方法を用いてもよい。また、必
要に応じて、穿孔後、押し抜き前、複数回の押し抜き途
中に、材料の再加熱を行う。更に、複数回の押し抜き途
中で材料を一旦冷却して、疵の検査、偏肉の検査を行な
い、検査結果が許容範囲外の場合は、疵除去、偏肉修正
を行った後、再加熱して押し抜きを続けることもある。Punching The bottomed tube obtained by punching is mounted on a mandrel of a horizontal press and pushed through a die. This punching method includes a method of arranging a plurality of dies having a smaller diameter one after another and punching through these dies all at once, and a method of punching a plurality of dies each having a successively smaller diameter one by one in order. Either method or both methods may be used. If necessary, the material is reheated after punching, before punching, and during punching a plurality of times. In addition, the material is once cooled during the multiple punching processes, and is inspected for defects and uneven thickness. If the inspection result is out of the allowable range, remove defects and correct uneven thickness, then reheat. And then continue punching.
【００１６】 熱処理 押し抜きで得た押し抜き管を、金属間化合物の固溶化温
度以上に加熱して、所望の強度および組織を得る。この
加熱温度は、例えばハステロイＣ−２７６で１１７０℃
と高い。そのため、管表面に粒界酸化が生じる。しか
し、この表面は、後の内外面加工で除去され、最終の冷
間加工での割れ疵の原因にはならない。炉としては、通
常、台車式熱処理炉を使用する。保持時間は、通常0.５
時間以上とする。Heat treatment The punched tube obtained by the punching is heated to a temperature above the solid solution temperature of the intermetallic compound to obtain a desired strength and structure. This heating temperature is, for example, 1170 ° C. with Hastelloy C-276.
And high. Therefore, grain boundary oxidation occurs on the tube surface. However, this surface is removed in the subsequent inner and outer surface processing, and does not cause cracks and defects in the final cold working. A truck-type heat treatment furnace is usually used as the furnace. Retention time is usually 0.5
More than time.
【００１７】 内外面加工 熱処理後の押し抜き管の内外面に切削または研削を行
う。この加工の本来の目的は、黒皮除去および偏肉修正
であるが、本発明では、更に、粒界酸化層の除去が加わ
る。黒皮除去および偏肉修正に必要な削り代は、最低５
ｍｍ程度である。一方、粒界酸化層の深さは、２ｍｍ程
度である。したがって、黒皮除去および偏肉修正のため
に内外面を加工することにより、削り代を増すことな
く、粒界酸化層が除去される。なお、この内外面加工に
先立って、押し抜き管の底部を除去する。Inner / Outer Surface Machining Cutting or grinding is performed on the inner and outer surfaces of the punched pipe after the heat treatment. The original purpose of this processing is to remove the black skin and correct the uneven thickness, but in the present invention, the removal of the grain boundary oxide layer is further added. The minimum scraping amount required for black skin removal and uneven thickness correction is 5
It is about mm. On the other hand, the depth of the grain boundary oxide layer is about 2 mm. Therefore, by processing the inner and outer surfaces for removing the black skin and correcting uneven thickness, the grain boundary oxide layer is removed without increasing the cutting allowance. Prior to this inner and outer surface processing, the bottom of the punched pipe is removed.
【００１８】 冷間加工 加工硬化のために、内外面加工後の押し抜き管を冷間加
工する。冷間加工としては、例えば冷間引抜きを用い
る。加工条件は、硬度がＨv ２５０以上になるような加
工度を選択し、プラグを用いたプラグ引抜きとするのが
よい。冷間加工を受ける押し抜き管は、予め内外面の粒
界酸化層を除去されているので、冷間加工で表面に割れ
疵を生じるおそれはない。Cold Working For the work hardening, the punched tube after the inner and outer surface processing is cold worked. As the cold working, for example, cold drawing is used. As for the processing condition, it is preferable to select a processing degree such that the hardness is H v 250 or more, and to perform plug extraction using a plug. Since the punched pipe that is subjected to cold working has the grain boundary oxide layers on the inner and outer surfaces removed in advance, there is no risk of cracks on the surface during cold working.
【００１９】このようにしてスリーブ材が製造される
と、これをロール軸に外嵌させて２ピース構造の通電ロ
ールとなす。２ピース構造の通電ロールの構造例を図３
に示す。６はスリーブ材、７はロール軸、８はロール軸
７の中心部に設けた冷却水の通水孔である。スリーブ材
６は、エルハルト穿孔−押し抜き−冷間加工の工程で製
造されているので、耐久性に優れる。なお、スリーブ材
６の材質は、前述したように、ハステロイＣ−２７６、
Ｎｉ−Ｃｒ系合金等の耐食合金であり、ロール軸７の材
質は炭素鋼等である。When the sleeve material is manufactured in this manner, the sleeve material is externally fitted to the roll shaft to form a two-piece structure current-carrying roll. Fig. 3 shows an example of the structure of the two-piece energizing roll
Shown in. Reference numeral 6 is a sleeve material, 7 is a roll shaft, and 8 is a water passage hole provided in the center of the roll shaft 7. Since the sleeve material 6 is manufactured in the process of piercing Erhalt, punching, and cold working, it has excellent durability. The sleeve material 6 is made of Hastelloy C-276, as described above.
It is a corrosion-resistant alloy such as a Ni-Cr alloy, and the material of the roll shaft 7 is carbon steel or the like.
【００２０】[0020]
【実施例】以下に本発明の実施例を説明する。EXAMPLES Examples of the present invention will be described below.
【００２１】表１に成分を示すハステロイＣ−２７６か
らなる鋳塊を１２５０℃に加熱後、表２に示すスケジュ
ールでエルハルト穿孔し押し抜きした。鋳塊のマンドレ
ルが圧下される面はフラットとした。また、押し抜きは
４回とした。An ingot made of Hastelloy C-276 having the components shown in Table 1 was heated to 1250 ° C., and then Erhalt was punched and punched according to the schedule shown in Table 2. The surface of the ingot on which the mandrel was pressed was flat. Moreover, the punching was performed 4 times.
【００２２】[0022]
【表１】 [Table 1]
【００２３】[0023]
【表２】 [Table 2]
【００２４】押し抜き管を１１７０℃×３０分の条件で
熱処理した後、その内外面を切削し、更に冷間引抜きを
行った。冷間引抜きは３回行ない、トータル加工度を２
5.４％とした。冷間引抜き後の押し抜き管の割れ疵をＰ
Ｔにより調査した。５本を調査したが、いずれにも割れ
疵は認められなかった。同様の調査を、内外面加工後に
熱処理を行った管についても行ったが、３本中２本に最
大深さ２ｍｍの割れ疵が生じた。After heat-treating the extruded tube under the conditions of 1170 ° C. for 30 minutes, the inner and outer surfaces thereof were cut and further cold drawn. Cold drawing is performed 3 times, and the total working ratio is 2
It was set to 5.4%. P for cracks in punched pipes after cold drawing
Surveyed by T. Five pieces were examined, but no cracks were found in any of them. The same investigation was carried out on the pipes which were heat-treated after the inner and outer surfaces were processed, but cracks having a maximum depth of 2 mm occurred in two of the three pipes.
【００２５】また、図２に示すように、鋳塊のマンドレ
ルが圧下される面にガイド用凹部を形成して同様の穿孔
を行った。この穿孔により得られた２本の底付管を冷却
後、その底部の偏肉を測定した結果、ガイド用凹部のな
い場合に最大で１４０ｍｍ平均で１２０ｍｍあった偏肉
量が、最大で１２ｍｍ平均で１0.３ｍｍに低減された。
凹部寸法はＤ＝３５０ｍｍ、Ｒ＝４００ｍｍ、Ｈ＝５０
ｍｍとした。更に、穿孔前の加熱を、図１に示すよう
に、不活性ガス（Ａｒガス）のシールド雰囲気中で行っ
た場合と、シールドなしに行った場合とでは、穿孔後の
外面疵に大きな相違が見られた。即ち、３本の穿孔結果
では、不活性ガス雰囲気加熱の場合には外面疵は認めら
れなかったが、シールドなしの加熱を行った場合には、
２本に大きな亀甲状の割れ疵が認められ、１本に小さな
亀甲状の割れ疵が認められた。Further, as shown in FIG. 2, a guide recess was formed on the surface of the ingot to which the mandrel was pressed, and the same perforation was performed. After cooling the two bottomed tubes obtained by this perforation, the uneven thickness of the bottom was measured, and as a result, the maximum unevenness amount of 140 mm was 120 mm and the average uneven thickness was 12 mm when there was no guide recess. Was reduced to 10.3 mm.
The recess dimensions are D = 350 mm, R = 400 mm, H = 50
mm. Further, as shown in FIG. 1, there is a large difference in the external flaw after the perforation between the case where the heating before the perforation is performed in the shield atmosphere of the inert gas (Ar gas) and the case where the heating is performed without the shield. I was seen. That is, in the results of drilling three holes, no external flaw was observed in the case of heating in an inert gas atmosphere, but in the case of heating without shielding,
A large turtle-like crack was found in two, and a small turtle-like crack was found in one.
【００２６】表３は通電ロールの寿命を示す。寿命は、
表３に記載した製法によって製造したスリーブ材を内外
面研削、研磨した後ロール軸に焼嵌めし、さらにスリー
ブ材の表面を研磨して得られた通電ロールを電気めっき
処理に用いたときの、従来法の寿命に対する寿命比で表
わしてある。スリーブ材の製法によってロール寿命が大
きく異なり、本発明法で製造された通電ロールは特に耐
久性が高い。Table 3 shows the life of the energizing roll. Life is
When the sleeve material manufactured by the manufacturing method described in Table 3 is subjected to inner and outer surface grinding, polishing, shrink fitting, and then the surface of the sleeve material is used for electroplating, It is represented by the life ratio to the life of the conventional method. The roll life varies greatly depending on the method of manufacturing the sleeve material, and the current-carrying roll manufactured by the method of the present invention has particularly high durability.
【００２７】[0027]
【表３】 [Table 3]
【００２８】[0028]
【発明の効果】以上の説明から明らかなように、本発明
の通電ロールの製造方法は、スリーブ材を穿孔−押し抜
きと冷間加工との組み合わせで製造するので、スリーブ
材の材質の耐久性が高い。穿孔−押し抜きに不可欠な内
外面加工を熱処理の後に行うので、最終の冷間加工で表
面疵が生じず、疵除去に伴うスリーブ厚の減少も少な
い。したがって、耐久性に著しく優れた通電ロールが製
造される。また、工程の組み換えによって耐久性改善を
図るので、工数の増加がなく、製造効率も非常に良い。As is apparent from the above description, according to the method of manufacturing the energizing roll of the present invention, since the sleeve material is manufactured by the combination of punching-punching and cold working, the durability of the material of the sleeve material is improved. Is high. Since the inner and outer surface processing that is indispensable for punching and punching is performed after the heat treatment, surface defects do not occur in the final cold working, and the reduction in sleeve thickness due to the removal of the defects is small. Therefore, a current-carrying roll having extremely excellent durability is manufactured. Further, since the durability is improved by recomposing the process, the number of steps is not increased and the manufacturing efficiency is very good.
【図１】穿孔のための加熱を例示する模式図である。FIG. 1 is a schematic view illustrating heating for perforation.
【図２】穿孔を例示する模式図である。FIG. 2 is a schematic view illustrating perforation.
【図３】通電ロールの構造を例示する模式図である。FIG. 3 is a schematic view illustrating the structure of an energizing roll.
１ スリーブ材の素材である鋳塊 ３ 鋼製蓋 ５ ガイド用凹部 ６ スリーブ材 ７ ロール軸 1 Ingot as a material of sleeve material 3 Steel lid 5 Recess for guide 6 Sleeve material 7 Roll shaft
Claims (3)
ース構造の通電ロールの製造方法において、耐食合金か
らなる中実の素材を加熱してエルハルト穿孔により底付
管となし、この底付管を押し抜いた後、その押し抜き管
に熱処理を行って所定の強度および組織を与え、しかる
後に、黒皮除去および偏肉修正のための内外面加工を行
ない、更に、冷間加工により加工硬化を与えてスリーブ
材となすことを特徴とする通電ロールの製造方法。1. A method for producing a two-piece structure electrification roll in which a sleeve material is fitted onto a roll shaft, wherein a solid material made of a corrosion-resistant alloy is heated to form a bottomed tube by Elhard's perforation. After the pipe is extruded, the extruded pipe is heat-treated to give it a predetermined strength and structure, and then the inner and outer surfaces are processed to remove the black skin and correct uneven thickness, and then processed by cold working. A method for producing a current-carrying roll, characterized by hardening to form a sleeve material.
される面の中央部に、マンドレルを位置決めするガイド
用凹部を形成した素材を用いることを特徴とする請求項
１に記載の通電ロールの製造方法。2. The method for producing a current-carrying roll according to claim 1, wherein a material having a guide recess for positioning the mandrel is formed in the center of the surface on which the mandrel is pressed during Elhard drilling. ..
で行うことを特徴とする請求項１または２に記載の通電
ロールの製造方法。3. The method for producing an energizing roll according to claim 1, wherein the material heating for punching is performed in an inert atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5665392A JPH05222579A (en) | 1992-02-07 | 1992-02-07 | Manufacture of electric conductive roll |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5665392A JPH05222579A (en) | 1992-02-07 | 1992-02-07 | Manufacture of electric conductive roll |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05222579A true JPH05222579A (en) | 1993-08-31 |
Family
ID=13033333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5665392A Pending JPH05222579A (en) | 1992-02-07 | 1992-02-07 | Manufacture of electric conductive roll |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05222579A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4825124A (en) * | 1984-05-07 | 1989-04-25 | Gte Laboratories Incorporated | Phosphor particle, fluorescent lamp, and manufacturing method |
| JP2010221285A (en) * | 2009-03-25 | 2010-10-07 | Sumitomo Metal Ind Ltd | Ehrhardt piercing process and core bar for ehrhardt piercing process |
-
1992
- 1992-02-07 JP JP5665392A patent/JPH05222579A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4825124A (en) * | 1984-05-07 | 1989-04-25 | Gte Laboratories Incorporated | Phosphor particle, fluorescent lamp, and manufacturing method |
| JP2010221285A (en) * | 2009-03-25 | 2010-10-07 | Sumitomo Metal Ind Ltd | Ehrhardt piercing process and core bar for ehrhardt piercing process |
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