Main Roll Cooling Layout for Ring Rolling Temperature Control
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Solution Overview
Problem
Existing ring rolling methods face challenges in effectively cooling the main roll and its peripheral portions, leading to defects in the ring material, particularly with hard-to-process materials like Ni-based superalloys, and complicate the structure of the rolling mill, making maintenance difficult and strength insecure.
Innovation Solution
A method of cooling the main roll by injecting liquid into a recessed receiving part of the die surrounding the shaft, which efficiently cools the shaft and peripheral areas while maintaining the strength and facilitating maintenance of the rolling mill.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If cooling water is sprayed to the processed part of the forming roll, then the processed part is cooled, but the temperature of the processed part decreases too much causing defects in the ring material
Solution Approach 1:
The patent applies local quality by providing different cooling intensities to different parts of the forming roll. The processed part receives minimal or no cooling water to maintain its temperature and prevent ring material defects, while the shaft and peripheral portions receive adequate cooling through water passages to prevent overheating and structural damage.
2Temperature
If water passages are provided in the shaft and peripheral portion, then cooling effectiveness is improved, but the structure becomes complicated and strength is reduced
Solution Approach 1:
The patent applies the nesting principle by integrating water passages within the structure of the shaft and peripheral portions of the forming roll. The cooling channels are embedded inside the existing structural components, allowing cooling functionality to be incorporated without significantly increasing external dimensions or compromising the overall strength of the main roll.
3Temperature
If complex cooling mechanisms are added to the main roll, then cooling coverage is improved, but maintenance difficulty increases
Solution Approach 1:
The patent applies segmentation by dividing the cooling system into distinct modules: water passages in the shaft, water passages in the peripheral portions, and the processed part structure. This modular segmentation allows each component to be independently maintained or replaced, simplifying maintenance procedures compared to an integrated complex cooling system.
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 approach ensures secure strength and efficient cooling of the main roll, enabling the production of high-quality ring rolled bodies by maintaining appropriate temperature control, reducing defects, and simplifying maintenance.
Implementation Method 1
cooling the shaft and the peripheral portion thereof of the main roll by allowing the liquid cooling medium to come into contact with the shaft and the peripheral portion
Data Source
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AI summary
In a method of cooling a main roll, strength of a shaft and a peripheral portion thereof of the main roll is sufficiently secured, maintenance of the main roll is facilitated, and the shaft and the peripheral portion thereof of the main roll are efficiently cooled. In a method of manufacturing a ring rolled body, a high-quality ring rolled body is produced. The present invention relates to a method of cooing a main roll 1 for ring rolling in a state in which one side, in the rotation axis direction, of the main roll 1 faces upward, and relates to a method of manufacturing a ring rolled body, including the cooling method. In the cooling method, the shaft 11 is cooled by injecting a liquid W into a receiving part 13, 17 which is recessed from an upper end surface 12c of a die 12 of the main roll 1 facing the one side in the rotation axis direction and surrounds the shaft 11 of the main roll 1. In the method of manufacturing a ring rolled body, a ring rolled body is manufactured by heating the die 12 by an induction heating mechanism 6 and cooling the shaft 11 by the cooling method, and further, reducing a ring material M between the main roll 1 and the mandrel 2.