JPS5910488B2 - Measuring method of contact pressure distribution between rolling mill rolls - Google Patents
Measuring method of contact pressure distribution between rolling mill rollsInfo
- Publication number
- JPS5910488B2 JPS5910488B2 JP53054826A JP5482678A JPS5910488B2 JP S5910488 B2 JPS5910488 B2 JP S5910488B2 JP 53054826 A JP53054826 A JP 53054826A JP 5482678 A JP5482678 A JP 5482678A JP S5910488 B2 JPS5910488 B2 JP S5910488B2
- Authority
- JP
- Japan
- Prior art keywords
- rolls
- contact pressure
- rolling mill
- pressure distribution
- strain
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0061—Force sensors associated with industrial machines or actuators
- G01L5/0076—Force sensors associated with manufacturing machines
- G01L5/0085—Force sensors adapted for insertion between cooperating machine elements, e.g. for measuring the nip force between rollers
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Description
【発明の詳細な説明】
本発明は圧延機ロール間の接触圧力分布を測定する方法
に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for measuring contact pressure distribution between rolling mill rolls.
圧延機ロールにおいては、ロール間の接触圧力分布が常
に一定になつていることが重要で、これが保たれなくな
ると製品の品質、形状が損われるようになる。In rolling mill rolls, it is important that the contact pressure distribution between the rolls is always constant; if this is not maintained, the quality and shape of the product will be impaired.
また、ロールの寿命も短・くなる。−例として作業ロー
ルと補強ロール間の接触圧力分布が不均一になつた四重
圧延機では、局部的に大きな接触圧力が作用したところ
の補強ロールにスポーリングと呼ばれる剥離が生じ、ロ
ール寿命が極端に低下した事実が認められている。この
接触圧力分布の不均一は、ロールの摩耗、熱変形、たわ
み変形などが主要な原因となつている。しかしながら、
現在までのところ、組立てられたロール間の接触圧力分
布を測定する方法は見出されていない。もしも、組立て
られたロール間の接触圧力分布を測定することができる
ならば、接触圧力分布の不均一性を著しく高めないうち
に、ロールを補修することが可能になり、ロールの寿命
を延長しつつ製品の品質、形状を保証することができる
ようになる。Moreover, the life of the roll is also shortened. -For example, in a quadruple rolling mill where the contact pressure distribution between the work roll and the reinforcing roll becomes uneven, peeling called spalling occurs on the reinforcing roll where a large contact pressure is applied locally, which shortens the life of the roll. It is acknowledged that there has been an extreme decline. The main causes of this non-uniform contact pressure distribution are roll wear, thermal deformation, flexural deformation, etc. however,
To date, no method has been found to measure the contact pressure distribution between assembled rolls. If it were possible to measure the contact pressure distribution between assembled rolls, it would be possible to repair the rolls without significantly increasing the non-uniformity of the contact pressure distribution, extending the life of the rolls. This makes it possible to guarantee the quality and shape of the product.
また、圧延機の特性やロールの摩耗特性を推定するため
に役立たせることもできるようになる。本発明の目的は
、組立てられた圧延機ロール間の接触圧力分布を測定し
て、ロールを早期に補修できるようにすることにある。It will also become useful for estimating rolling mill characteristics and roll wear characteristics. An object of the present invention is to measure the contact pressure distribution between assembled rolling mill rolls so that the rolls can be repaired at an early stage.
本発明は本質的には、圧延機の運転停止時に、上記圧延
機に組込まれたロール間の歪を歪ゲージ 一で測定して
接触圧力分布を求めることにある。The present invention essentially consists in determining the contact pressure distribution by measuring the strain between the rolls installed in the rolling mill using a strain gauge when the rolling mill is stopped.
このようにすれば、組立てられた圧延機ロール間の接触
圧力分布を測定することができ、接触圧力を著しく高め
ないうちにロールを補修することが可能になる。したが
つて、ロールの寿命を延長しつつ製品の品質および形状
を保証できるようになる。本発明において、圧延機の運
転停止時とはロールが回転していない状態を意味してお
り、圧延作業の途中あるいは終了の別を問わない。In this way, the contact pressure distribution between the assembled rolling mill rolls can be measured, and it becomes possible to repair the rolls without significantly increasing the contact pressure. Therefore, the quality and shape of the product can be guaranteed while extending the life of the roll. In the present invention, when the rolling mill is stopped means a state where the rolls are not rotating, and it does not matter whether the rolling operation is in the middle or at the end.
ロール間の歪を歪ゲージで債リ定するときには、ロール
に荷重をかけて該ロールを歪ゲージ側に押しつけること
が望ましい。When determining the strain between rolls using a strain gauge, it is desirable to apply a load to the rolls and press the rolls against the strain gauge.
歪ゲージをロール間に挿入するときには、その複数個を
金属製ビームの所定の位置に固定する。When inserting strain gauges between rolls, a plurality of strain gauges are fixed at predetermined positions on a metal beam.
こうすればロール間の接触圧力分布を速やかに測定する
ことができる。この場合、金属製ビームは歪ゲージの基
材と弾性係数が等しいかあるいは近似したもので作る。In this way, the contact pressure distribution between the rolls can be quickly measured. In this case, the metal beam is made of a material whose elastic modulus is equal to or similar to the base material of the strain gauge.
第１図および第２図は本発明の一実施例で、接触圧力測
定装置の構造を示している。歪ゲージ２は基材（以下、
圧力測定子と云う）に取り付けられ、それらは圧力測定
子１と実質的に等しい弾性係数を有する金属製ビーム３
内に埋め込まれている。FIG. 1 and FIG. 2 are one embodiment of the present invention, and show the structure of a contact pressure measuring device. The strain gauge 2 is a base material (hereinafter referred to as
pressure gauges), they are made of a metal beam 3 having a modulus of elasticity substantially equal to that of the pressure gauge 1.
embedded within.
圧力測定子１のロール間に挟まれる厚さと該位置におけ
る金属製ビーム３の厚さとはほ〜等しくなつている。歪
ゲージ２にはリード線４が接続されており、そのリード
線は金属製ビーム３に設けた引き出し口５を経て外部へ
引き出され、歪測定メータ６へ連結されている。The thickness of the pressure measuring element 1 sandwiched between the rolls is approximately equal to the thickness of the metal beam 3 at that position. A lead wire 4 is connected to the strain gauge 2, and the lead wire is drawn out through an outlet 5 provided in the metal beam 3 and connected to a strain measuring meter 6.
７は１つの歪測定メータによつて各圧力測定子の歪をす
べて測定するため、必然的に必要となつてくる切換スイ
ツチである。Reference numeral 7 denotes a changeover switch which is inevitably required since all the strains of each pressure gauge are measured by one strain measuring meter.
この切換スイツチは、それぞれのリード線をそれぞれの
歪測定メータに接続しておくならば必要でなくなる。歪
ゲージ２を取り付けた圧力測定子１を埋め込んだ金属製
ビーム３は、圧力測定子１がロール表面と接触するよう
に圧延機ロール間に挿入される。This changeover switch is not necessary if each lead wire is connected to each strain measurement meter. A metal beam 3 in which a pressure gauge 1 with a strain gauge 2 is embedded is inserted between rolling mill rolls so that the pressure gauge 1 is in contact with the roll surface.
第３図および第４図は、四重圧延機の補強ロール８と作
業ロール９間に金属製ビーム３を挿入した状態を示した
ものである。１０は被圧延材である。3 and 4 show a state in which a metal beam 3 is inserted between a reinforcing roll 8 and a work roll 9 of a quadruple rolling mill. 10 is a material to be rolled.
この状態あるいは更にロールに荷重をかけると、圧力測
定子１に歪が加わり、それが歪測定メータに記録される
。測定精度の高い接触圧力分布を得るには、口ール全体
に均等に荷重のかかることが必要であり、この荷重を受
ける金属製ビーム３はロール間に挟まれる厚さが該位置
における圧力測定子１の厚さと実質的に等しいことが必
要になる。In this state or when a load is further applied to the roll, strain is applied to the pressure measuring element 1, which is recorded on the strain measuring meter. In order to obtain a contact pressure distribution with high measurement accuracy, it is necessary to apply a load evenly to the entire mouth, and the metal beam 3 that receives this load has a thickness that is sandwiched between the rolls so that the pressure can be measured at that position. It is necessary that the thickness be substantially equal to the thickness of the child 1.
金属製ビーム３はロール間に安定して挿入されるために
適当な幅をもつていることが望まれる。It is desirable that the metal beam 3 has an appropriate width so that it can be stably inserted between the rolls.
安定に挿入するための一手段として第５図に示すように
金属製ビーム３の側面に板ばね１１を設けるのも望まし
いことである。圧力測定子１と金属製ビーム３との間に
隙間があつたり、弾性係数に大きな違いがあつたりする
と、それらが測定誤差となつてあられれるので、それら
の差はできるだけ少なくすべきである。As a means for stable insertion, it is also desirable to provide a leaf spring 11 on the side surface of the metal beam 3, as shown in FIG. If there is a gap between the pressure probe 1 and the metal beam 3, or if there is a large difference in the elastic coefficients, this will result in measurement errors, so these differences should be minimized as much as possible.
特に弾性係数については両者ほＫ等しくし、圧力測定子
１が鋼製のときには金属製ビーム３も鋼製とし、鋳鉄対
鋼、鋼または鋳鉄対非鉄合金の組合せは避けるべきであ
る。鋼対鋼の組合せならば、材料組成が違つていても弾
性係数にはそれほど大きな違いが現れないので、十分高
い測定精度を保証することができる。歪ゲージ２は圧力
測定子１に１個取り付けるだけで十分である。In particular, the elastic modulus of both should be equal to K, and when the pressure gauge head 1 is made of steel, the metal beam 3 should also be made of steel, and combinations of cast iron and steel, steel, or cast iron and non-ferrous alloys should be avoided. In the case of a steel-to-steel combination, even if the material composition is different, there will not be a large difference in the elastic modulus, so a sufficiently high measurement accuracy can be guaranteed. It is sufficient to attach one strain gauge 2 to the pressure gauge 1.
しかし、圧力測定子の側面の両側に貼つた方が圧力測定
子１の幅の中央に荷重がかからなかつたときの歪調整と
荷重位置の判定を行なうのに都合がよい。圧延機はその
使用中、ロールに冷水を散布するのが普通である。However, it is more convenient to attach it to both sides of the pressure gauge head for strain adjustment and determination of the load position when no load is applied to the center of the width of the pressure gauge head 1. During use of a rolling mill, it is common to spray cold water onto the rolls.
したがつて、ロール間に金属製ビームを挿入するに際し
ては、歪ゲージに防湿処理を施しておくのが望ましい。
また、防湿のためのコーテイングは引き出し口まで行な
うのが特に望ましい。これによりリード線の固定を強め
ることができる。測定された歪はそのままロール間の接
触圧力の判定に用いてよい。Therefore, when inserting a metal beam between rolls, it is desirable to apply a moisture-proofing treatment to the strain gauge.
Furthermore, it is particularly desirable to apply moisture-proof coating to the drawer opening. This makes it possible to strengthen the fixation of the lead wire. The measured strain may be used as is to determine the contact pressure between the rolls.
しかし、一般に接触圧力は線圧（ロール軸方向の単位長
さ当たりの荷重）で示されるので、測定された歪から線
圧を求める方法について以下に説明する。ロールの軸方
向にＸ１接線方向にｙ座標をとり、矩形状の圧力測定子
を用いた場合に、圧力測定子の大きさをｘ方向にＡ，．
ｙ方向にｂとすると、圧力測定子に作用する荷重Ｐｓは
次式で求められる。However, since the contact pressure is generally expressed as a linear pressure (load per unit length in the roll axis direction), a method for determining the linear pressure from the measured strain will be described below. When the y coordinate is taken in the tangential direction of X1 in the axial direction of the roll, and a rectangular pressure gauge is used, the size of the pressure gauge is set as A, .
Assuming that b is in the y direction, the load Ps acting on the pressure probe is determined by the following equation.
ここで、Ｆ（ｘ）、Ｇ（ｙ）はＸ．ｙ方向の接触圧力分
布を表わす繭数、ｗは金属製ビームとロールの接触幅で
ある。また、応力と歪の間にはフツク（ＨＯＯｋｅ）の
法則がなり立つものとしてさらに圧力測定子の軸方向へ
の幅ａを圧力変化を無視できるほどに小さくするかまた
は幅ａにおける平均圧力を考えればＦ（ｘ）＝一定とお
いて（２）式を（１）式に代入してＧ（ｙ）が得られる
。Here, F(x) and G(y) are X. The number of cocoons represents the contact pressure distribution in the y direction, and w is the contact width between the metal beam and the roll. Furthermore, assuming that HOOke's law holds true between stress and strain, it is also possible to make the axial width a of the pressure probe so small that pressure changes can be ignored, or to consider the average pressure in the width a. For example, G(y) can be obtained by substituting equation (2) into equation (1) with F(x)=constant.
従つて線圧Ｐ（ｘ）は次式により求められる。第６図は
５６インチ四重熱間連続圧延機における測定結果の１例
を示したものである。Therefore, the linear pressure P(x) is determined by the following equation. FIG. 6 shows an example of measurement results in a 56-inch quadruple continuous hot rolling mill.
接触圧力分布の測定は作業ロールが３時間、補強ロール
が６日間使用された直後すなわち圧延機の運転停止時に
金属製ビームを第３図に示す如く両ロール間に挿入し、
５００トンおよび１５００トンの荷重をかけて圧力測定
子にかかる歪を測定することで行なつた。The contact pressure distribution was measured by inserting a metal beam between both rolls as shown in Fig. 3 immediately after the work roll had been used for 3 hours and the reinforcing roll for 6 days, that is, when the rolling mill was stopped.
This was done by applying loads of 500 tons and 1500 tons and measuring the strain applied to the pressure probe.
その結果、第６図から明らかなようにロール胴端部の接
触圧力は胴中央部に比較して異常に高いことが判り、胴
端部に発生するスポーリング現象を実験的に証明するこ
とができた。As a result, as is clear from Figure 6, it was found that the contact pressure at the end of the roll body was abnormally high compared to the center of the body, and it was possible to experimentally prove the spalling phenomenon that occurs at the end of the body. did it.
以上の説明から明らかなように、本発明によれば組立て
られた状態において、圧延機ロール間の接触圧力分布を
測定することができる。As is clear from the above description, according to the present invention, the contact pressure distribution between rolling mill rolls can be measured in an assembled state.
このため測定精度の信頼性が高められる。また、この測
定結果に基いて適正クラウン、チヤンフアの設定、スポ
ーリングを防止するための経済的な改削量の決定などを
行なうことができる。This increases the reliability of measurement accuracy. Further, based on the measurement results, it is possible to set an appropriate crown and chamfer, and to determine an economical amount of modification to prevent spalling.
第１図は本発明の一実施例による接触圧力測定装置の平
面図、第２図は同じく正面図、第３図はロール間の接触
圧力を測定するための構成を示す正面図、第４図は同じ
く側面図、第５図は本発明の他の実施例を示す側面図、
および第６図は圧延機ロール間の接触圧力分布測定結果
の具体例を示す曲線図である。
符号の説明、１・・・・・・圧力測定子、２・・・・・
・歪ゲージ、３・・・・・・金属製ビーム、４・・・・
・・リード線、５・・・・・・引き出し口、６・・・・
・・歪測定メータ。FIG. 1 is a plan view of a contact pressure measuring device according to an embodiment of the present invention, FIG. 2 is a front view thereof, FIG. 3 is a front view showing a configuration for measuring contact pressure between rolls, and FIG. 4 is also a side view, FIG. 5 is a side view showing another embodiment of the present invention,
and FIG. 6 is a curve diagram showing a specific example of the measurement results of the contact pressure distribution between rolling mill rolls. Explanation of symbols, 1...Pressure probe, 2...
・Strain gauge, 3...Metal beam, 4...
...Lead wire, 5...Drawer opening, 6...
...Distortion measurement meter.
Claims (1)
ル間に、歪ゲージを有する複数個の基材を、上記基材と
弾性係数が実質的に等しくかつ上記ロール間に挾まれる
厚さが該位置における上記基材の厚さと実質的に等しい
金属製ビーム内の所定の位置に固定して挿入し、上記ロ
ール間の歪を上記歪ゲージで測定して接触圧力分布を求
めることを特徴とする圧延機ロール間の接触圧力分布の
測定法。1. When the rolling mill is stopped, a plurality of base materials having strain gauges are placed between the rolls installed in the rolling mill, and the elastic modulus is substantially equal to that of the base material, and the thickness is such that it is sandwiched between the rolls. is fixedly inserted at a predetermined position within a metal beam substantially equal to the thickness of the base material at the position, and the strain between the rolls is measured with the strain gauge to determine the contact pressure distribution. A method for measuring the contact pressure distribution between rolling mill rolls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53054826A JPS5910488B2 (en) | 1978-05-08 | 1978-05-08 | Measuring method of contact pressure distribution between rolling mill rolls |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53054826A JPS5910488B2 (en) | 1978-05-08 | 1978-05-08 | Measuring method of contact pressure distribution between rolling mill rolls |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP48023226A Division JPS5762012B2 (en) | 1973-02-28 | 1973-02-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5452581A JPS5452581A (en) | 1979-04-25 |
| JPS5910488B2 true JPS5910488B2 (en) | 1984-03-09 |
Family
ID=12981471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP53054826A Expired JPS5910488B2 (en) | 1978-05-08 | 1978-05-08 | Measuring method of contact pressure distribution between rolling mill rolls |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5910488B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6338752Y2 (en) * | 1979-04-18 | 1988-10-12 | ||
| JP2007093236A (en) * | 2005-09-27 | 2007-04-12 | Dainippon Printing Co Ltd | Nip load measuring instrument |
| JP4993064B2 (en) * | 2006-04-27 | 2012-08-08 | 大日本印刷株式会社 | Nip load measuring device |
| CN103411718B (en) * | 2013-08-12 | 2015-06-10 | 江苏大学 | Method for measuring shock pressure of flyer under high strain rate and device thereof |
-
1978
- 1978-05-08 JP JP53054826A patent/JPS5910488B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5452581A (en) | 1979-04-25 |
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