薄帶冷連軋工作輥竄輥邊降調控功效

王曉晨; 馮夏維; 徐冬; 楊荃; 孫薊泉

doi:10.13374/j.issn2095-9389.2019.03.01.003

薄帶冷連軋工作輥竄輥邊降調控功效

doi: 10.13374/j.issn2095-9389.2019.03.01.003

王曉晨^{1, 2,},
馮夏維^{1, 2, 3, ,},
徐冬^{1, 2},
楊荃^{1, 2},
孫薊泉¹

1.
北京科技大學工程技術研究院，北京 100083
2.
北京科技大學國家板帶生產先進裝備工程技術研究中心，北京 100083
3.
機械工業儀器儀表綜合技術經濟研究所，北京 100055

基金項目: 國家自然科學基金資助項目(51604024)；北京市自然科學基金資助項目(3182026)；廣西創新驅動發展專項資金資助項目(桂科AA17202008)

詳細信息

通訊作者:
E-mail: fengxiawei@qq.com

中圖分類號: TG334.9
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出版歷程
- 收稿日期: 2019-03-01
- 刊出日期: 2020-02-01

Effectiveness of edge drop control of tapered work roll shifting during tandem cold rolling process

WANG Xiao-chen^{1, 2
,},
FENG Xia-wei^{1, 2, 3
, ,},
XU Dong^{1, 2},
YANG Quan^{1, 2},
SUN Ji-quan¹

1.
Institute of Engineering Technology, University of Science and Technology Beijing, Beijing 100083, China
2.
National Engineering Research Center of Flat Rolling Equipment, University of Science and Technology Beijing, Beijing 100083, China
3.
Instrumentation Technology and Economy Institute, Beijing 100055, China

More Information

Corresponding author: E-mail: fengxiawei@qq.com

摘要

摘要: 在冷連軋無取向硅鋼薄帶過程中，為了實現錐形工作輥竄動自動控制邊降，需要合理的確定功效系數與策略。這種系數的獲得，不只需要研究本道次的軋輥彈性變形、薄帶橫向流動、機架間變形對竄輥效率的影響，更重要的是需研究上游機架竄輥對下游機架的影響。這就需要高效的仿真模型來完成以上計算。基于邊降區域的金屬橫向流動理論，建立了將橫向流動視為純剪切增量的數值模型，避免了沿帶寬方向建立剛度矩陣，從而提高了計算效率。同時考慮了薄帶在機架間發生的軋后屈服流動，由于錐形工作輥竄動，打破了帶鋼斷面的等比例遺傳關系，使得軋后帶鋼在邊部區域需要縮寬并減薄來補償邊部延伸率差。所建立的數值模型通過工業現場實驗驗證，相比于原有模型具有更高的精度。完成了兩個機架連續計算，研究了上游機架竄輥對下游機架出口邊降的影響。研究發現，第一機架的邊降控制范圍最寬，第二、三機架控制范圍逐漸變窄。根據該規律設計了根據三點邊降偏差的配合調控策略，相比單點策略在工業應用中取得了更好效果。
- 板帶軋制 /
- 預設定 /
- 橫向流動 /
- 機架間軋后屈服 /
- 邊降自動控制
Abstract: In the process of tandem cold rolling of nonoriented silicon steel strip, it is imperative to design the control strategy and initial values of the edge drop control efficiency coefficient to achieve automated control in the edge drop by shifting tapered work roll. To obtain these values, intensive modeling is needed to study not only the effects of work roll deformation, metal transverse flow, and inter-stand deformation on tapered work roll shifting at one stand but also the effects of different work roll shifting values at the upstream stand on the edge drop at downstream stand. These intensive calculations have to be performed by an accurate numerical model with a high cost/effective ratio. Based on the metal transverse flow theory at the edge drop zone, a numerical model was built in this study, in which the lateral flow was treated as a pure shear increment inside the rolling region, so that building a stiffness matrix in the lateral direction was not needed and modeling cost was saved. Additionally, inter-stand deformation was considered. Considering the proportional ratio of the strip was broken by the tapered work roll shifting, the longitudinal strain at the strip edge was considerably lower than the strain at the center, which leaded to shrinking and thinning near the edge. It was proved that the coupled model can provide results, which were obtained through industrial experiments, with higher accuracy compared with the original one. Successive calculations of two stands were conducted to reveal the control effectiveness of different tapered work roll shifting values at upstream stand on the downstream stand. It has been observed that the edge drop control region is the widest at the 1st stand, and its width successively reduces at the 2nd and 3rd stands. Based on this rule, a control strategy based on a three-point measure instead of a single point was proposed, and it was proved to be more effective than the one-point measure used in industrial applications.
- strip rolling /
- preset /
- transverse flow /
- inter-stand post-rolling yielding /
- edge drop automatic control

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圖 1 邊降自動控制系統（a）和工作輥竄輥調控功效系數（b）

Figure 1. Schematic of edge drop control system (a) and schematic showing the effectiveness of tapered work roll shifting (b)

下載: 全尺寸圖片幻燈片

圖 2 薄帶軋制受力與變形分析圖。（a）正視圖；（b）側視圖；（c）俯視圖

Figure 2. Force and deformation diagram of strip rolling: (a) front view; (b) side view; (c) top view

下載: 全尺寸圖片幻燈片

圖 3 整體計算流程

Figure 3. Flow chart of the improved model

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圖 4 模型驗證。（a）第一機架計算結果; （b）第二機架計算結果

Figure 4. Validation of model: (a) results of 1st stand; (b) results of 2nd stand

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圖 5 錐形工作輥竄輥邊降調控功效系數。（a）第1特征點；（b）第2特征點；（c）第3特征點；（d）三點配合調控策略應用效果

Figure 5. Effectiveness of edge drop control of tapered work roll shifting: (a) at measuring Point 1; (b) at measuring Point 2; (c) at measuring Point 3; (d) applied effects of three-point control strategy

下載: 全尺寸圖片幻燈片

表 1 軋制參數表

Table 1. Table of rolling parameters

機架號入口厚度/mm 壓下量/% 后前張力/MPa 摩擦系數

1 2.50 30 15/135 0.085
2 1.80 35 135/140 0.080
3 1.18 31 140/145 0.070
4 0.80 28 145/145 0.060

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