Ring Rolling Mill Mandrel Assembly to Prevent Bending Offsets
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Solution Overview
Problem
In radial/axial ring rolling mills, the mandrel lifting device protrudes excessively during ring removal, risking damage and bending, and existing adjustments for varying ring sizes lead to bending torques and vertical offsets, complicating the rolling process.
Innovation Solution
The mandrel bearing head and roller mandrel are adjusted as a unit using a second linear adjustment device, eliminating the need for a separate mandrel lifting device and preventing vertical offsets, allowing secure fitting and horizontal adjustment to accommodate different ring sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the mandrel lifting device is used to pull the roller mandrel vertically upwards for ring removal, then the roller mandrel can be removed from the ring, but the mandrel lifting device protrudes excessively upwards creating risk of damage and bending
Solution Approach 1:
The mandrel lifting device is extracted from the system and replaced by a different mechanism. The roller mandrel is no longer pulled vertically by a separate lifting device, but is instead lifted horizontally together with the mandrel bearing head and first linear adjustment device as an integrated unit, eliminating the protruding lifting device that caused damage risks
Solution Approach 2:
The functions of the mandrel lifting device are merged into the horizontal linear adjustment device. The mandrel bearing head and first linear adjustment device are adjusted as a unit, combining the previously separate lifting function with the horizontal positioning function, thereby eliminating the need for a separate protruding lifting mechanism
2Strength
If the upper mandrel bearing is lowered relative to the mandrel bearing head to reduce bending length, then the bending loading is reduced, but a vertical offset is created leading to bending torques in the mandrel bearing head
Solution Approach 1:
The mandrel bearing head and first linear adjustment device are merged into a single adjustable unit. This integration allows the entire assembly to be positioned horizontally without creating vertical offsets, eliminating bending torques while maintaining proper mandrel alignment and minimizing bending loads through optimized geometric relationships
3Adaptability or versatility
If the mandrel bearing head is adjusted horizontally to change spacing between main roller and roller mandrel, then the ring shaping is enabled, but the adjustment mechanism increases device complexity
Solution Approach 1:
The mandrel bearing head and first linear adjustment device are combined into a single integrated unit that adjusts together horizontally. This merging reduces the number of separate adjustment mechanisms needed, simplifying the overall device complexity while maintaining full adaptability for different ring sizes through coordinated horizontal positioning
Data Source
AI summary
A radial/axial ring rolling mill for rolling a ring has an axial rolling device and a radial rolling device. The radial rolling device includes a main roller and a roller mandrel, between which the ring can be shaped. The roller mandrel is retained in the upper region thereof on a mandrel bearing head supported in a first linear adjustment device to be able to be horizontally adjusted in such that the roller mandrel can be moved perpendicularly to the longitudinal extent thereof in the direction towards the main roller and in the opposite direction thereto. The first linear adjustment device together with the mandrel bearing head and the roller mandrel is able to be adjusted as a unit by a second linear adjustment device in a vertical manner so that the roller mandrel can be pulled out of the inner space of the ring and introduced therein.