不?袗?熱軋產線可逆式精軋機在生產中其進出口兩端之夾引輥組所承受的熱效應，需有足夠的熱傳遞對流以維持其功能。本文針對原廠的夾引輥組在生產中所衍生的四個問題點 : (1) 輥面對鋼板產生印痕 ; (2) 輥面高溫會產生燒附現象，輥面的硬度降低 ; (3) 輥面會產生裂痕 ; (4) 搖臂橫管產生變形。經改善後的夾引輥稱之為新夾引輥，原廠之夾引輥稱之為舊夾引輥。首先，計算舊夾引輥與新夾引輥各處的溫度梯度，釐清輥面異常高溫的原因。其次，根據舊夾引輥與新夾引輥最容易發生裂痕之處，計算其xy方向的應力與yz方向的應力，釐清影響熱應力裂痕的因素，並求證改善後之新夾引輥的熱應力效應值比舊夾引輥小。接著分析搖臂橫管改善前後之熱變形與熱對流的關係。並根據舊引輥與新夾引輥的內部構造，分別計算各處循環冷卻水的流動阻抗矩陣，以及分析流動阻抗與輥內結構的關係。最後，研發及設計輥輪研磨機，以改善輥面品質。

The entry and exit side pinch roll unit of the reversing finishing mill of stainless hot strip rolling mill line bears heat effects during producing. Its transfer convection must be sufficient to maintain its function. According to the original pinch roll unit during producing, there are four questions as follows: (1) Strip marks are formed from the roll surface. (2) High temperature of roll surface cause burning phenomenon and lower the hardness of roll surface. (3) Cracks are formed on the roll surface. (4) There is a deflection of horizontal pipe of rocker arm.
The improved pinch roll is called new pinch roll. The original pinch roll is called old pinch roll. First, temperature gradients of each location for the old pinch roll and the new pinch roll are calculated, and the reasons of the abnormal high temperature of roll surface are clarified. Second, for the places of the old and new pinch rolls which are the easiest to crack, its stresses of x-y and y-z directions are analyzed. Influence factors of thermal stress crack are clarified. It is proved that the thermal stress effects of the new pinch roll are less than the old pinch roll. Third, the relations of thermal deflection and heat convection for the original horizontal pipe of rocker arm and for the improved horizontal pipe are analyzed. Furthermore, according to the internal structure of the old and new pinch rolls, the flow resistance of circulating water cooling system for each place is considered. Finally, roll grinder is developed and designed to improve the quality of roll surface.

誌謝……………………………………………………………………..Ⅰ
摘要……………………………………………………………………..Ⅱ
英文摘要………………………………………………………………..Ⅲ
目錄……………………………………………………………………..Ⅳ
圖目錄…………………………………………………………………..Ⅶ
表目錄……………………………………………………………….....ⅩⅠ
第一章 前言……………………………………………………………1
1.1 文獻回顧 ………………………………………………….2
1.2 研究目的與動機…………………………………………...3
第二章 夾引輥組與其生產問題………………………………….8
2.1 熱軋不?袗?產線…………………………………………...8
2.2 可逆式精軋機之夾引輥組………………………………..9
2.3 夾引輥組之生產問題分析……………………………….11
第三章 夾引輥生產之基本理論…………………………………20
3.1 熱傳學觀念之基本概念………………………………….20
3.2熱傳學之邊界層的基本概念……………………………...25
3.2 夾引輥輥面熱對流傳遞分析………………………………...27
3-3 舊夾引輥內部循環冷卻水熱對流傳遞分析…………...28
3-4 新夾引輥內部循環冷卻水熱對流傳遞分析…………...43
3-5 舊夾引輥與新夾引輥熱流計算數據比較及曲線分析……..57
3-6 結語…………………………………………………………..60
第四章 夾引輥熱應力及熱效應分析…………………………...61
4.1 夾引輥應力觀念分析…………………………………….61

4.2 舊夾引輥與新夾引輥熱應力計算…………………………..65
4.3 舊夾引輥與新夾引輥最易發生裂痕處分析………………..68
4.4 舊夾引輥與新夾引輥熱應力曲線分析……………………...79
4.5 結語…………………………………………………………...80
第五章 夾引輥循環冷卻水流力特性解析……………………..82
5.1 循環冷卻水流體力學基本觀念…………………………82
5.2 舊夾引輥循環冷卻水流動阻抗分析………………………...83
5.3 新夾引輥循環冷卻水流動阻抗分析………………………..86
5.4 舊夾引輥循環冷卻水流動阻抗及壓降矩陣分析…………..88
5.5 新夾引輥循環冷卻水流動阻抗及壓降矩陣分析…………..92
5.6 舊夾引輥與新夾引輥循環冷卻水流動阻抗曲線分析……...96
5.7 結語…………………………………………………………...98
第六章 夾引輥組之搖臂橫管受鋼板高溫熱輻射之熱變形分析…..99
6.1 搖臂橫管撓曲觀念分析……………………………………...99
6.2 高溫不?袗?板對搖臂橫管產生的熱熱輻射量……………100
6.3 搖臂橫管管內兩端口開放熱對流傳遞分析……………….101
6.4 搖臂橫管管內封閉熱對流傳遞分析…………………….…105
6.5 搖臂橫管撓曲之有限元素模型分析…………………….…107
6.6 結語……………………………………………………….…110
第七章 研磨機研發設計……………………………………………111
7.1 需求概述………………………………………………….…111
7.2 研磨機詳細視圖………………………………………….…117
7.3 研磨機零件詳細及組裝程序…………………………….…121
7.3 研磨機線上作動原理…………………………………….…127
7.4 研磨機氣壓系統控制迴路……………………………….…129
7.5 結語……………………………………………………….…131
第八章 結論與建議…………………………………………………132
參考文獻………………………………………………………………134
自述……………………………………………………………………136
著作權聲明……………………………………………………………137

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