Rolling Mill Guide With Dual Oil Passages For Crown Rate Control
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Solution Overview
Problem
In rolling mills where coolant is supplied through a passage within the guide, insufficient space between work rolls limits the adjustment of coolant temperature and flow rate, restricting the controllability of the crown rate of work rolls.
Innovation Solution
A rolling mill design with separate rolling oil and temperature-adjusted oil passages within the guide allows independent control of oil temperature and flow rate, enabling precise adjustment of the crown rate without altering the rolling oil's temperature and flow rate, using a profile data acquisition system to optimize oil application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If coolant is supplied through a passage within the guide, then the structure is simplified, but the controllability of crown rate is limited due to restricted adjustment range of coolant temperature and flow rate
Solution Approach 1:
The single coolant supply system is segmented into two independent passages: a rolling oil passage for cooling and lubrication, and a temperature-adjusted oil passage for crown rate control. This segmentation allows each passage to be optimized for its specific function, enabling independent adjustment of temperature and flow rate for crown rate control without affecting the rolling oil parameters.
Solution Approach 2:
Different regions of the guide are assigned different functions: the rolling oil passage supplies coolant at the leading end for cooling and lubrication, while the temperature-adjusted oil passage supplies temperature-controlled oil for crown rate control. This local differentiation of quality enables simultaneous optimization of both cooling and crown rate control functions.
2Productivity
If multiple intermediate rolls are provided in contact with work rolls, then rolling function is enhanced, but space for supplying coolant between work rolls is insufficient
Solution Approach 1:
The coolant supply approach is shifted from a horizontal direction (between work rolls) to a vertical direction (through the guide structure). The temperature-adjusted oil passage is formed within the guide to supply temperature-controlled oil to the work rolls, bypassing the space constraint imposed by intermediate rolls.
Solution Approach 2:
The guide structure serves as an intermediary medium to deliver temperature-adjusted oil to the work rolls. By utilizing the guide as the delivery pathway, the system overcomes the spatial limitation created by intermediate rolls and enables effective crown rate control.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enhances the controllability of the crown rate of work rolls by allowing independent adjustment of temperature and flow rates of the temperature-adjusted oil, enabling a wider range of crown rate changes without affecting the rolling oil's parameters, thus improving operational flexibility.
Implementation Method 1
a temperature adjusted oil supply member for applying temperature adjusted oil having a different temperature from the rolling oil to the work rolls through the temperature adjusted oil passage to control the crown rate of the work rolls
Implementation Method 2
rolling oil called coolant is supplied for cooling and lubricating the work rolls
Implementation Method 3
rolling oil called coolant is supplied for cooling and lubricating the work rolls
Data Source
AI summary
The rolling mill comprises a pair of work rolls for rolling a plate material in the thickness direction, a guide for guiding the leading end of the plate material between the work rolls, and a rolling oil supply member for supplying rolling oil between the work rolls through a rolling oil passage formed within the guide. The rolling mill further comprises a temperature adjusted oil passage formed within the guide separately from the rolling oil passage, and a temperature adjusted oil supply member for applying temperature adjusted oil having a different temperature from the rolling oil to the work rolls through the temperature adjusted oil passage so as to control the crown rate of the work rolls, improving the controllability of the crown rate of the work roll.