JPS641204B2 - - Google Patents
Info
- Publication number
- JPS641204B2 JPS641204B2 JP21019582A JP21019582A JPS641204B2 JP S641204 B2 JPS641204 B2 JP S641204B2 JP 21019582 A JP21019582 A JP 21019582A JP 21019582 A JP21019582 A JP 21019582A JP S641204 B2 JPS641204 B2 JP S641204B2
- Authority
- JP
- Japan
- Prior art keywords
- grinding
- threaded part
- threaded
- grindstone
- 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
- 238000005098 hot rolling Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B28/00—Maintaining rolls or rolling equipment in effective condition
- B21B28/02—Maintaining rolls in effective condition, e.g. reconditioning
- B21B28/04—Maintaining rolls in effective condition, e.g. reconditioning while in use, e.g. polishing or grinding while the rolls are in their stands
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
Description
【発明の詳細な説明】
本発明は、鋼板等の連続熱間圧延用ロールの圧
延中に摩耗した通板部とその両側の非通板部の段
差を解消してロールを再使用できるようにするロ
ール研削方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention eliminates the level difference between the threaded part worn out during rolling of a roll for continuous hot rolling of steel plates and the non-threaded parts on both sides thereof, so that the roll can be reused. The present invention relates to a roll grinding method.
第１図に示すように連続熱間圧延を所定量行な
つた圧延ロール１は、圧延材の幅ｌに等しい範囲
が摩耗する。その摩耗の仕方は、被圧延材の側端
部を圧延する部位Ｓが中央部Ｃより深く摩耗す
る。この理由は、被圧延材側端部の温度低下が大
きいことに加えて、圧延時の幅広がりによる摺り
摩擦が大きいためと考えられる。 As shown in FIG. 1, a rolling roll 1 that has been subjected to continuous hot rolling for a predetermined amount is worn out in an area equal to the width l of the rolled material. As for the manner of wear, the part S where the side edges of the material to be rolled are rolled is worn more deeply than the central part C. The reason for this is thought to be that in addition to the large temperature drop at the side end of the rolled material, there is also large sliding friction due to width expansion during rolling.
このように摩耗したロール１に砥石を所定押圧
力で圧接し図示の線２まで研削することによつて
段差解消をはかつたところ、砥石の押圧力が一定
である限り、第２図に示すように研削されてしま
い段差の解消ができず、通板部の方がよけいに研
削されてしまうことがわかつた。 When the grinding wheel was pressed against the worn roll 1 with a predetermined pressing force and grinding was carried out to the line 2 shown in the figure, the level difference was eliminated. It was found that the level difference could not be eliminated because of the grinding, and the threaded part was ground even more.
このような研削の不均一性について、研削能率
〔被研削ロール一回転当りの研削量（研削深さμ
ｍ）〕の面からの測定結果を第３図に示す。この
例では、通板部は非通板部に比べて約３倍ぐらい
研削能率が高くなつている。 Regarding such non-uniformity of grinding, grinding efficiency [grinding amount per rotation of the roll to be ground (grinding depth μ
Figure 3 shows the measurement results from the plane of [m)]. In this example, the grinding efficiency of the threaded part is about three times higher than that of the non-threaded part.
尚、このときの被研削ロールは、通常多用され
るニツケルグレンロールであり、120（rev／min）
の回転状態で、砥石の材質はGC120H、砥石押付
力は400Kg（±５％）であつた。 The roll to be ground at this time is a commonly used nickel grain roll, with a grinding speed of 120 (rev/min).
In the rotating state, the material of the grindstone was GC120H, and the pressing force of the grindstone was 400 kg (±5%).
このことから砥石の押圧力が一定であれば、通
板部と非通板部の段差解消ができない理由は、こ
の研削能率の違いにあることがわかる。 From this, it can be seen that if the pressing force of the grindstone is constant, the difference in grinding efficiency is the reason why it is not possible to eliminate the difference in level between the plate-passing part and the non-plate-passing part.
この研削能率の違いは、通板部が圧延に使用さ
れて熱疲労を受けて研削されやすくなつているた
めと思われる。このような通板部と非通板部の段
差を解消するには、逐一砥石の押圧力を変化させ
たり、砥石を変える等の必要がある。ところが押
圧力を逐一変化させるのは、作業が繁雑なばかり
でなく研削用砥石装置も複雑な機構を必要とし、
装置自体が大がかりになる。また、いちいち砥石
を使いわけるのも能率が悪く現実的でない。 This difference in grinding efficiency is thought to be due to the fact that the threaded section is used for rolling and is subject to thermal fatigue, making it more susceptible to grinding. In order to eliminate such a level difference between the threaded portion and the non-threaded portion, it is necessary to change the pressing force of the grindstone or change the grindstone. However, changing the pressing force one by one is not only a complicated operation, but also requires a complicated mechanism for the grinding wheel device.
The device itself becomes large-scale. Also, it is inefficient and impractical to use a different whetstone for each grindstone.
本発明は、上記通板部と非通板部の研削能率の
違いに着目して成されたもので、砥石の押圧力一
定の条件で能率的に圧延ロールの通板部と非通板
部の段差を解消せんとするものであり、その要旨
は、圧延に使用された回転状態のロール表面に砥
石を押し当てて、通板部と非通板部の段差を解消
する研削を行なうに当たり、先ず研削能率の低い
非通板部を研削し、その際、通板部と非通板部の
研削能率の比をｎとして、ｎのマイナス１乗の研
削代（厚み）を残し、次いで、通板部と前記非通
板部残部を同一押圧力の砥石で研削することにあ
る。 The present invention was made by focusing on the difference in grinding efficiency between the thread-threading part and the non-threading part, and efficiently grinds the rolling roll between the thread-threading part and the non-threading part under the condition that the pressing force of the grindstone is constant. The purpose is to press a grindstone against the surface of a rotating roll used for rolling to perform grinding to eliminate the difference in level between the threaded part and the non-threaded part. First, the non-threaded part, which has low grinding efficiency, is ground, and at this time, when the ratio of the grinding efficiency of the threaded part and the non-threaded part is n, a grinding allowance (thickness) of n to the negative first power is left, and then the threaded part is ground. The purpose is to grind the plate portion and the remaining portion of the non-plate portion with a grindstone having the same pressing force.
このように通板部と非通板部の研削能率の比を
考慮して二段階研削を行なうと砥石の押圧力を部
分的に変化させたり、砥石を変える必要がなく能
率的に、圧延ロールの段差解消研削を行なうこと
ができる。 By performing two-step grinding in consideration of the ratio of grinding efficiency between the threaded part and the non-threaded part, there is no need to partially change the pressing force of the grinding wheel or change the grinding wheel. It is possible to perform step-removal grinding.
第４図は、本発明による研削例を示すものであ
る。 FIG. 4 shows an example of grinding according to the present invention.
所定量熱間圧延に供されたロール１は、破線で
示すように通板部（中央部）と非通板部（中央部
の両側）の間に段差ができ、この段差を解消すべ
く先ず通板部の両側の非通板部のみ（図の部）
を研削する。その際通板部と非通板部の研削能率
の比ｎで通板部の研削代（厚み）ｔを割つたｔ／ｎ
の研削代を残して研削する。続いて、中央の通板
部と上記非通板部研削代残り分（ｔ／ｎ）を合わせ
た分（図の）とを同一押圧力の砥石で研削を行
なう。この部の研削においては、研削能率に応
じて、研削能率の低い非通板部を少く残してある
ので、結果として圧延ロールは通板部と非通板部
を平均に研削することが可能となる。 The roll 1 that has been subjected to hot rolling for a predetermined amount has a level difference between the threaded part (center part) and the non-threaded part (both sides of the center part) as shown by the broken line. Only the non-threaded parts on both sides of the threaded part (parts shown in the diagram)
to grind. At this time, grinding is performed while leaving a grinding allowance of t/n, which is the grinding allowance (thickness) t of the threaded part divided by the grinding efficiency ratio n of the threaded part and the non-threaded part. Subsequently, the central threaded portion and the remaining grinding allowance (t/n) of the non-threaded portion (as shown in the figure) are ground using a grindstone with the same pressing force. When grinding this part, depending on the grinding efficiency, a small amount of the non-threaded part with low grinding efficiency is left, so as a result, the rolling roll can grind the threaded part and the non-threaded part evenly. Become.
以上説明したように、本発明によると熱間圧延
ロールの使用後の段差を能率的に解消できる。 As explained above, according to the present invention, it is possible to efficiently eliminate the difference in level after use of a hot rolling roll.
第１図は、熱間圧延に供された所定量圧延を行
なつたロールの通板部と非通板部の摩耗状況を説
明するための部分断面図、第２図は、第１図に示
したロールを同一押圧力の砥石で研削したときの
研削状況を説明するための部分断面図、第３図
は、通板部と非通板部の研削能率の測定結果を示
すグラフ、第４図は、本発明の研削順序を説明す
るための部分断面図である。
Figure 1 is a partial sectional view for explaining the wear status of the threaded part and non-threaded part of a roll that has been subjected to hot rolling and has been rolled by a predetermined amount. FIG. 3 is a partial cross-sectional view for explaining the grinding situation when the shown roll is ground by a grindstone with the same pressing force; FIG. The figure is a partial sectional view for explaining the grinding sequence of the present invention.
Claims (1)
て、通板摩耗部と非通板部とを研削して段差解消
する方法において、まず、非通板部を通板部研削
代（厚み）の１／ｎ相当厚を残して研削し、次い
で、通板部と前記非通板部研削代残部とを同一砥
石押圧力で研削することを特徴とする熱間圧延ロ
ールの研削方法。 ただし、ｎ：通板部と非通板部の研削能率の比[Claims] 1. In a method of pressing a grindstone against a rotating hot rolling roll and grinding a threaded worn part and a non-threaded part to eliminate a level difference, first, the non-threaded part is ground. A hot rolling roll characterized in that the part is ground leaving a thickness equivalent to 1/n of the grinding allowance (thickness), and then the threaded part and the remaining grinding allowance of the non-threaded part are ground with the same grindstone pressing force. Grinding method. However, n: Ratio of grinding efficiency of threaded part and non-threaded part
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21019582A JPS59101211A (en) | 1982-11-30 | 1982-11-30 | Grinding method of hot rolling roll |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21019582A JPS59101211A (en) | 1982-11-30 | 1982-11-30 | Grinding method of hot rolling roll |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59101211A JPS59101211A (en) | 1984-06-11 |
| JPS641204B2 true JPS641204B2 (en) | 1989-01-10 |
Family
ID=16585355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21019582A Granted JPS59101211A (en) | 1982-11-30 | 1982-11-30 | Grinding method of hot rolling roll |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59101211A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60199511A (en) * | 1984-03-21 | 1985-10-09 | Sumitomo Metal Ind Ltd | Method for grinding roll of rolling mill |
-
1982
- 1982-11-30 JP JP21019582A patent/JPS59101211A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59101211A (en) | 1984-06-11 |
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