Segmented Roller Cap for Ring Rolling Mill Wear Reduction
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Solution Overview
Problem
Ring rolling mills face high costs and frequent replacement of heavy, large rollers due to wear, especially when processing high-temperature materials like titanium and nickel-based alloys, as conventional rollers are expensive and require replacement in entirety.
Innovation Solution
A detachable and replaceable roller cap with a conical outer surface is designed for axial rolls, allowing the cap to be made from high-alloy materials like hot-work steel or nickel-based alloys, reducing overall costs and enabling easier maintenance by replacing only the cap, which has a lower weight and can be produced at lower costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional rollers are used for high-temperature processing, then the rollers can process materials like titanium and nickel-based alloys, but the rollers become expensive and require frequent replacement due to wear
Solution Approach 1:
The roller is divided into two separable parts: the roller body (made of ordinary steel) and the roller cap (made of heat-resistant alloy). This segmentation allows the expensive heat-resistant material to be used only where necessary (the cap that contacts the workpiece), while the roller body uses cheaper material. The roller cap can be detached and replaced independently when worn, significantly reducing replacement costs and downtime.
2Reliability
If the entire roller including shaft is replaced due to wear, then the roller can maintain processing quality, but the replacement cost and time increase significantly
Solution Approach 1:
The roller is divided into two separable parts: the roller body (made of ordinary steel) and the roller cap (made of heat-resistant alloy). This segmentation allows the expensive heat-resistant material to be used only where necessary (the cap that contacts the workpiece), while the roller body uses cheaper material. The roller cap can be detached and replaced independently when worn, significantly reducing replacement costs and downtime.
Solution Approach 2:
The roller cap is designed as a consumable component that can be discarded when worn and replaced with a new cap, while the expensive roller body is retained and reused. This approach recovers the value of the roller body and only replaces the relatively inexpensive cap, reducing overall replacement costs and time.
3Temperature
If high-alloy hot-work steel or nickel-based alloy is used for the entire roller, then the roller can withstand high temperatures, but the manufacturing cost increases significantly
Solution Approach 1:
Different parts of the roller have different material qualities suited to their specific functions. The roller cap, which directly contacts the hot workpiece, is made of heat-resistant alloy to withstand high temperatures. The roller body, which does not directly contact the workpiece, is made of ordinary steel, reducing overall material cost while maintaining necessary thermal performance at the critical interface.
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 reduces operational costs by allowing the use of high-quality materials only for the cap, simplifies maintenance by exchanging only the cap, and minimizes heat transfer to bearings, enhancing the economic processing of both high-temperature and normal steel applications.
Implementation Method 1
the point of separation or interface between the roller cap and the roller body reduces heat transfer, so that high temperatures can be prevented from migrating into the bearings of the roller arrangement
Data Source
AI summary
The invention relates to a roll for a ring rolling mill, characterized in that the roll (3, 4) has a main roll body (5) and a roll cap (6) placed on the main roll body (5).