JPH0315208Y2 - - Google Patents
Info
- Publication number
- JPH0315208Y2 JPH0315208Y2 JP1985007793U JP779385U JPH0315208Y2 JP H0315208 Y2 JPH0315208 Y2 JP H0315208Y2 JP 1985007793 U JP1985007793 U JP 1985007793U JP 779385 U JP779385 U JP 779385U JP H0315208 Y2 JPH0315208 Y2 JP H0315208Y2
- Authority
- JP
- Japan
- Prior art keywords
- roll gap
- roll
- rolling mill
- work rolls
- axial direction
- 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
- 238000005096 rolling process Methods 0.000 claims description 28
- 238000001514 detection method Methods 0.000 description 8
- 238000012937 correction Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Description
【考案の詳細な説明】
［産業上の利用分野］
本考案は圧延機、特に、作業ロールを軸線方向
にシフトし得るようにした圧延機におけるロール
ギヤツプの測定方式に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for measuring roll gaps in a rolling mill, particularly in a rolling mill whose work rolls can be shifted in the axial direction.
［従来の技術］
圧延機において、ロールギヤツプの管理は製品
の寸法精度を維持する上で重要である。従来、こ
のロールギヤツプを検出する場合、圧下シリンダ
に設けた位置検出器によりシリンダのピストンあ
るいはラムの位置を求め、これをロールギヤツプ
に変換するのが一般的な方法であつた。しかし、
斯かる方法の場合、ハウジングの伸びや圧下シリ
ンダ内の油の体積変化の影響を受けるため、これ
らの影響を演算補正しており、精度的に限界に達
していた。[Prior Art] In rolling mills, roll gap management is important for maintaining the dimensional accuracy of products. Conventionally, when detecting this roll gap, the general method was to determine the position of the piston or ram of the cylinder using a position detector provided on the reduction cylinder, and convert this to the roll gap. but,
In the case of such a method, since it is affected by the elongation of the housing and the change in the volume of oil in the compression cylinder, these effects are corrected by calculation, and the accuracy has reached its limit.
詳述すると、第６図は従来の圧延機のロール位
置制御方式としての代表例であり、ビスラ制御系
の制御装置を備えた圧延機を示している。図中２
７は圧延機ハウジング、２８，２９は作業ロー
ル、３０，３１は控えロール、３２は圧下シリン
ダ３３のラム、３４はロードセル、３５はラム３
２の変位計、３６は演算制御器である。 To be more specific, FIG. 6 is a typical example of a roll position control system of a conventional rolling mill, and shows a rolling mill equipped with a control device of the Bisla control system. 2 in the diagram
7 is a rolling mill housing, 28 and 29 are work rolls, 30 and 31 are backing rolls, 32 is a ram of the rolling cylinder 33, 34 is a load cell, and 35 is a ram 3
2 is a displacement meter, and 36 is an arithmetic controller.
第６図において、板厚指令値をxc、圧延機の
剛性係数（一般にミル常数と言う）をKm、荷重
定数をＣ、ラムの変位をｘ、圧延力をＦとすると
ビスラ制御では、
ｘ＝xc＋Ｃ／KmＦ …(1)
の如き関係でラム３２の変位ｘが得られる。即
ち、指令値xcよりＣ／Kmだけ大きくラム３２を変
位させ圧延機の伸びによるロールギヤツプの拡大
を補償して板厚変動をなくすようにしている。
又、Ｃ＝１とする場合、圧延機の伸びの影響を完
全に補償することが可能であり、ビスラ系の最終
目標を達成することができるとされている。 In Figure 6, if the plate thickness command value is xc, the rigidity coefficient of the rolling mill (generally called mill constant) is Km, the load constant is C, the displacement of the ram is x, and the rolling force is F, then in Bisla control, x= The displacement x of the ram 32 can be obtained from the relationship xc+C/KmF (1). That is, the ram 32 is displaced by C/Km greater than the command value xc to compensate for the expansion of the roll gap due to the elongation of the rolling mill and to eliminate variations in plate thickness.
Further, when C=1, it is possible to completely compensate for the influence of elongation of the rolling mill, and it is said that the ultimate goal of the Visla system can be achieved.
しかしながら、斯かる従来方式においては、ロ
ール間隙を直接検出するのではなく、圧下シリン
ダのラムの変位を検出し、圧延機の伸び分はロー
ドセルを用いて圧延力を検出し、ミル常数で割つ
て間接的に求めているため、ロードセルの分解能
からくる精度限度を来たしていた。 However, in this conventional method, instead of directly detecting the roll gap, the displacement of the ram of the rolling cylinder is detected, and the elongation of the rolling mill is calculated by detecting the rolling force using a load cell and dividing it by the mill constant. Because it is determined indirectly, there is a limit to accuracy due to the resolution of the load cell.
更に、近年、一定の板幅の圧延材の反覆圧延に
よるロールの段差摩耗（通常板道と称される）を
解消するとともに圧延材の形状を良好にするため
に、作業ロールを軸線方向にシフトし得るように
した圧延機が開発されている。而して、斯かるシ
フト圧延機では、作業ロールのシフトのため通常
の圧延機よりロール変形外乱が増加するので、前
記のロールギヤツプ検出方法によつてロールギヤ
ツプを精度良く求めるためには、更に複雑な演算
補正が必要となり、一層精度的問題が拡大されて
いた。例えば、(1)式においてミル常数Kmもロー
ルシフト量の関係となるので、シフト量に応じて
Kmを変えなければ、精度の良いビスラ制御がで
きないことは容易にわかる。すなわち、それだけ
補正演算は複雑になるわけである。 Furthermore, in recent years, the work rolls have been shifted in the axial direction in order to eliminate step wear on the rolls (usually referred to as plateway) caused by repeated rolling of rolled material with a constant width and to improve the shape of the rolled material. A rolling mill that can do this has been developed. In such a shift rolling mill, the roll deformation disturbance increases due to the shift of the work rolls compared to a normal rolling mill. Therefore, in order to accurately determine the roll gap using the roll gap detection method described above, a more complicated method is required. Calculation correction was required, further aggravating accuracy problems. For example, in equation (1), the mill constant Km is also related to the roll shift amount, so depending on the shift amount,
It is easy to see that accurate Bisla control cannot be achieved without changing Km. In other words, the correction calculation becomes that much more complicated.
［考案が解決しようとする問題点］
本考案は、作業ロールを軸線方向にシフトし得
るようにした圧延機において、複雑な外乱補正演
算を行わずに、容易且つ正確にロールギヤツプを
検出し得るようにしたものである。[Problems to be solved by the invention] The present invention provides a method for easily and accurately detecting a roll gap in a rolling mill in which the work rolls can be shifted in the axial direction, without performing complicated disturbance correction calculations. This is what I did.
［問題点を解決するための手段］
本考案は、作業ロールを軸線方向にシフトし得
るようにした圧延機において、前記作業ロールと
一体に軸線方向移動し且つ圧延材の幅端部近傍に
位置する部分を有する移動部材を設けると共に、
該移動部材の圧延材の幅端部近傍部分に位置する
部分にロールギヤツプ検出器を作業ロールのロー
ルギヤツプと近接させて取付けた構成としてい
る。[Means for Solving the Problems] The present invention provides a rolling mill in which a work roll can be shifted in the axial direction. a movable member having a portion to
A roll gap detector is attached to a portion of the moving member located near the width end of the rolled material in close proximity to the roll gap of the work roll.
［作用］
従つて、作業ロールがシフトしてもその移動と
一体に検出器が移動するので、検出器と作業ロー
ルとの位置関係が保持され、正確にロールギヤツ
プが検出される。[Operation] Therefore, even if the work roll shifts, the detector moves together with the shift, so the positional relationship between the detector and the work roll is maintained, and the roll gap is accurately detected.
［実施例］
以下、図面に基づいて本考案の実施例を説明す
る。[Example] Hereinafter, an example of the present invention will be described based on the drawings.
第１図及び第２図において、１，２は夫々反対
側の端部にテーパ部３，４を有し且つ図示しない
シフト装置によつて軸線方向に移動し得るように
した上下の作業ロール、５，６は上下作業ロール
１，２の軸箱であり、該各軸箱５，６には、ベン
デイングシリンダ７，８を内蔵したブロツク９，
１０が、前記ベンデイングシリンダのロツド７
ａ，８ａを介し作業ロール１，２と軸線方向に一
体移動可能に係合せしめてある。 1 and 2, upper and lower work rolls 1 and 2 have tapered portions 3 and 4 at opposite ends, respectively, and are movable in the axial direction by a shift device (not shown); 5 and 6 are axle boxes for the upper and lower work rolls 1 and 2, and each axle box 5 and 6 includes blocks 9 and 9 that have built-in bending cylinders 7 and 8, respectively.
10 is the rod 7 of the bending cylinder;
It is engaged with the work rolls 1 and 2 via a and 8a so that they can move together in the axial direction.
すなわち、第２図の側面図に示すように、軸箱
５，６は圧延荷重を受ける方向にはブロツク９，
１０を置き去りにして自由に動くことができ、ロ
ール軸方向にはブロツク９，１０と一体となつて
移動することができるようになつている。 That is, as shown in the side view of FIG. 2, the axle boxes 5 and 6 have blocks 9 and
The block 10 can be left behind and can move freely, and can move together with the blocks 9 and 10 in the roll axis direction.
斯かる圧延機に対し、テーパ部３，４側に位置
するブロツク９，１０には、ロールギヤツプ側内
側端部に、第３図に示すようにその検出ヘツド１
１，１２をロールギヤツプに近接させて渦電流式
ロールギヤツプ検出器１３，１４を取付ける。 In such a rolling mill, the blocks 9 and 10 located on the tapered portions 3 and 4 have their detection heads 1 at the inner ends on the roll gap side, as shown in FIG.
Eddy current type roll gap detectors 13 and 14 are installed with the rollers 1 and 12 close to the roll gap.
第３図はロールギヤツプ制御のブロツク線図を
示し、１５は前記検出器１３，１４からの信号を
加算して平均値を求める平均値演算器、１６は該
演算器１５からの信号に基づいてロールギヤツプ
を求める換算器、１７は該換算器１６からの信号
とロールギヤツプの設定信号とを加算する加算
器、１９は該加算器１７からの信号と圧下シリン
ダ１８に設けた位置検出器２１からのフイードバ
ツク信号２１ａとを比較し差があると修正指令を
圧下シリンダ１８への圧油の流出・流入を制御す
るサーボ弁２６へ送る制御装置である。 FIG. 3 shows a block diagram of roll gap control, in which numeral 15 is an average value calculator that adds the signals from the detectors 13 and 14 to obtain an average value, and 16 is a roll gap controller that calculates the average value by adding the signals from the detectors 13 and 14. 17 is an adder that adds the signal from the converter 16 and the roll gap setting signal. 19 is a feedback signal from the signal from the adder 17 and the position detector 21 provided in the reduction cylinder 18. 21a, and if there is a difference, it sends a correction command to the servo valve 26 that controls the outflow and inflow of pressure oil to the pressure reduction cylinder 18.
すなわち、本考案の制御系では、圧下シリンダ
１８に設けた位置検出器２１の信号をもとに、初
期のロールギヤツプを設定し、圧延中の荷重によ
る圧延機の伸びに帰因して起こるロールギヤツプ
の拡大量をロールギヤツプ直近に設置した検出器
１３，１４で検出して補正するものである。 That is, in the control system of the present invention, the initial roll gap is set based on the signal from the position detector 21 installed in the rolling cylinder 18, and the roll gap caused by the elongation of the rolling mill due to the load during rolling is controlled. The amount of expansion is detected by detectors 13 and 14 installed close to the roll gap and corrected.
斯かる構成において、上下作業ロール１，２間
のロールギヤツプを検出する場合、検出器１３，
１４では直接ロールギヤツプを検出するものでは
なく、検出ヘツド１１と一端部における上下作業
ロール１，２の周面接近部との隙間寸法ｘ，ｙ、
並びに検出ヘツド１２と他端部における上下作業
ロール１，２の周面接近部との隙間寸法x′，y′を
夫々検出し、これらの信号を演算器１５へ送つて
平均値を求め、更に換算器１６でロールギヤツプ
に換算するものである。 In such a configuration, when detecting a roll gap between the upper and lower work rolls 1 and 2, the detector 13,
14 does not directly detect the roll gap, but rather detects the gap size x, y,
In addition, the gap dimensions x' and y' between the detection head 12 and the peripheral surfaces of the upper and lower work rolls 1 and 2 at the other end are detected, respectively, and these signals are sent to the calculator 15 to obtain the average value. The converter 16 converts it into a roll gap.
即ち、検出器１３，１４をブロツク９，１０に
取付けた時に、検出ヘツド１３，１４からロール
ギヤツプ中心までの距離、検出ヘツド１３，１４
と作業ロール１，２のテーパ部３，４開始端との
間の距離、テーパ部３，４の角度、作業ロール
１，２の径等の値が総て分つているので、演算器
１５にて算出された平均値信号から換算器１６に
て前記の諸値に基づいてロールギヤツプを求める
ことができる。 That is, when the detectors 13, 14 are attached to the blocks 9, 10, the distance from the detection heads 13, 14 to the center of the roll gap, the distance between the detection heads 13, 14
Since the distance between the start end of the tapered portions 3 and 4 of the work rolls 1 and 2, the angle of the taper portions 3 and 4, and the diameters of the work rolls 1 and 2 are all known, the calculation unit 15 A converter 16 can calculate the roll gap based on the above-mentioned values from the average value signal calculated.
更に、換算器１６によつて求められたロールギ
ヤツプ換算信号は、加算器１７を介し制御装置１
９に送られてラムの位置信号２１ａと比較され、
差があるとサーボ弁２６に駆動指令が送られ、圧
下シリンダ１８のラム位置の調整を介しロールギ
ヤツプが修正される。すなわち、ロールギヤツプ
換算信号に基づき、圧下ラム１８ａがその分だけ
上方向に押し上げられてロールギヤツプが狭ま
り、ミルの伸びが補正されて初期の設定ギヤツプ
が維持されるわけである。 Further, the roll gap conversion signal obtained by the converter 16 is sent to the control device 1 via an adder 17.
9 and is compared with the ram position signal 21a,
If there is a difference, a drive command is sent to the servo valve 26 and the roll gap is corrected through adjustment of the ram position of the reduction cylinder 18. That is, based on the roll gap conversion signal, the reduction ram 18a is pushed upward by that amount, narrowing the roll gap, correcting the elongation of the mill, and maintaining the initially set gap.
前記において、作業ロール１，２が軸線方向に
シフトすると、各ブロツク９，１０も作業ロール
１，２と一体に移動するので、検出ヘツド１１，
１２と作業ロール１，２との関係は常に一定に保
持される。従つて、作業ロール１，２を圧延材Ｓ
の幅に対応して如何なる位置にシフトさせても、
検出系統に何ら調整を施すことなくロールギヤツ
プを検出することができる。 In the above, when the work rolls 1 and 2 shift in the axial direction, the blocks 9 and 10 also move together with the work rolls 1 and 2, so the detection heads 11 and
12 and the work rolls 1 and 2 are always maintained constant. Therefore, the work rolls 1 and 2 are rolled material S
No matter how you shift it to any position corresponding to the width of
Roll gaps can be detected without making any adjustments to the detection system.
尚、前記実施例では演算器１５によつてロール
ギヤツプの平均値を求めて修正作業を行つたが、
平均値を求めずに、作業ロール１，２間の各端部
位置におけるロールギヤツプを夫々別個に求め
て、作業ロール１，２の両端部、つまり作業側、
駆動側で各別にギヤツプ調整をするようにしても
よい。 Incidentally, in the embodiment described above, the average value of the roll gap was calculated by the calculating unit 15 and the correction work was performed.
Without determining the average value, the roll gap at each end position between the work rolls 1 and 2 is determined separately, and the roll gap at both ends of the work rolls 1 and 2, that is, the work side,
The gap may be adjusted separately on the drive side.
第４図及び第５図は本考案の他の実施例であ
り、作業ロール１，２はテーパ部３，４の代にリ
ング溝２２，２３を設けた方式の圧延機の場合を
示している。即ち、ロールギヤツプ検出器とし
て、リング溝２２，２３側に位置するブロツク
９，１０の一方に投光器２４を、又対向する他方
のブロツク９，１０に受光器２５を夫々対向させ
て取付け、作業ロール１，２のリング溝２２，２
３と作業ロール２，１の周面との間を通過する投
光器２４，２４からの光を夫々受光器２５，２５
にてロールギヤツプとして検出し、これら受光器
２５，２５からの信号を演算器１５にて平均値に
直し、この信号に基づいて前記実施例と同様な制
御を行うようにしたものである。 Figures 4 and 5 show other embodiments of the present invention, and show a rolling mill in which the work rolls 1 and 2 have ring grooves 22 and 23 in place of the tapered parts 3 and 4. . That is, as a roll gap detector, a light emitter 24 is attached to one of the blocks 9, 10 located on the ring grooves 22, 23 side, and a light receiver 25 is attached to the other block 9, 10 facing each other, and the work roll 1 is , 2 ring groove 22, 2
The light from the projectors 24, 24 passing between the work rolls 3 and the circumferential surfaces of the work rolls 2, 1 is received by the receivers 25, 25, respectively.
The roll gap is detected as a roll gap, and the signals from these light receivers 25, 25 are converted to an average value by the calculator 15, and the same control as in the previous embodiment is performed based on this signal.
この方式の場合には、リング溝２２，２３の深
さが一定であるから、作業ロール１，２がシフト
してもロールギヤツプが変化しても、ロールギヤ
ツプを簡単且つ確実に直接検出することができ、
検出精度が更に向上する。 In this method, the depth of the ring grooves 22 and 23 is constant, so even if the work rolls 1 and 2 shift or the roll gap changes, the roll gap can be directly detected easily and reliably. ,
Detection accuracy is further improved.
尚、前記実施例では、ロールギヤツプの検出器
をブロツクに取付けたが、各軸箱５，５間及び
６，６間に、作業ロール１，２と一体に軸線方向
移動し得るようにビームを掛け渡して、このビー
ムの所要位置に検出器を取付けるようにしてもよ
い。また、検出器は非接触式であれば、渦電流
式、光学式以外のものを使つても良いことは言う
までもない。 In the above embodiment, the roll gap detector was attached to the block, but a beam was installed between each axle box 5, 5 and between each axle box 6, 6 so that it could move in the axial direction together with the work rolls 1, 2. A detector may be attached to a desired position of this beam. It goes without saying that a detector other than the eddy current type or optical type may be used as long as it is a non-contact type detector.
［考案の効果］
以上説明したように本考案によれば、作業ロー
ルと一体に移動するようにした移動部材の圧延材
の幅端部近傍に位置する部分に、ロールギヤツプ
検出器をロールギヤツプに近接して取付けたの
で、圧延材の幅端部におけるロールギヤツプを直
接検出することができ、従つて作業ロールの撓み
等の影響を受けることなく、容易且つ正確にロー
ルギヤツプを検出することができる、と言う優れ
た効果を奏し得る。[Effects of the invention] As explained above, according to the invention, a roll gap detector is placed close to the roll gap in the portion of the movable member that moves together with the work roll, which is located near the width end of the rolled material. Since the roll gap is installed at the width end of the rolled material, it is possible to directly detect the roll gap at the width end of the rolled material. Therefore, the roll gap can be easily and accurately detected without being affected by deflection of the work roll. It can have a great effect.
第１図は本考案の圧延機の概略正面図、第２図
は第１図の側面図、第３図は第１図の−矢視
図、第４図は本考案の他の例を示す説明図、第５
図は第４図の−矢視図、第６図は従来の説明
図である。
１，２は作業ロール、５，６は軸箱、９，１０
はブロツク、１３，１４は検出器、２３は投光
器、２４は受光器を示す。
Fig. 1 is a schematic front view of the rolling mill of the present invention, Fig. 2 is a side view of Fig. 1, Fig. 3 is a view taken from - arrow in Fig. 1, and Fig. 4 shows another example of the present invention. Explanatory diagram, 5th
The figure is a view taken along the - arrow in FIG. 4, and FIG. 6 is an explanatory diagram of the conventional device. 1 and 2 are work rolls, 5 and 6 are axle boxes, 9 and 10
1 is a block, 13 and 14 are detectors, 23 is a light projector, and 24 is a light receiver.
Claims (1)
圧延機において、前記作業ロールと一体に軸線方
向移動し且つ圧延材の幅端部近傍に位置する部分
を有する移動部材を設けると共に、該移動部材の
圧延材の幅端部近傍部分に位置する部分にロール
ギヤツプ検出器を作業ロールのロールギヤツプと
近接させて取付けたことを特徴とする圧延機。 In a rolling mill in which a work roll can be moved in the axial direction, a moving member that moves in the axial direction integrally with the work roll and has a portion located near the width end of the rolled material is provided, and the moving member is moved in the axial direction. 1. A rolling mill characterized in that a roll gap detector is attached to a portion located near the width end of a rolled material in close proximity to a roll gap of a work roll.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985007793U JPH0315208Y2 (en) | 1985-01-23 | 1985-01-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985007793U JPH0315208Y2 (en) | 1985-01-23 | 1985-01-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61127808U JPS61127808U (en) | 1986-08-11 |
| JPH0315208Y2 true JPH0315208Y2 (en) | 1991-04-03 |
Family
ID=30486473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985007793U Expired JPH0315208Y2 (en) | 1985-01-23 | 1985-01-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0315208Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011078139A1 (en) * | 2011-06-07 | 2012-12-13 | Sms Siemag Ag | Measuring device, rolling stand and method for detecting the height of a roll gap |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57132009A (en) * | 1981-02-09 | 1982-08-16 | Nippon Kokan Kk <Nkk> | Measuring method for roll gap of work roll of rolling mill |
| JPS57137012A (en) * | 1981-02-16 | 1982-08-24 | Nippon Kokan Kk <Nkk> | Roll gap measuring device for working roll of rolling mill |
-
1985
- 1985-01-23 JP JP1985007793U patent/JPH0315208Y2/ja not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57132009A (en) * | 1981-02-09 | 1982-08-16 | Nippon Kokan Kk <Nkk> | Measuring method for roll gap of work roll of rolling mill |
| JPS57137012A (en) * | 1981-02-16 | 1982-08-24 | Nippon Kokan Kk <Nkk> | Roll gap measuring device for working roll of rolling mill |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61127808U (en) | 1986-08-11 |
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