Three-Roll Rolling Stand With Eccentric Caliber Adjustment
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Solution Overview
Problem
Existing rolling stands for metal tubes, bars, or wires often produce material with insufficient roundness due to a star-shaped arrangement of rolls, and their adjustment mechanisms are not easily adaptable for automated or remote operation.
Innovation Solution
A rolling stand with a hexagonal housing and star-shaped arrangement of rolls, allowing for modular positioning and adjustable radial distance via an eccentric mechanism, enabling flexible manual or automated operation and compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a star-shaped arrangement of three rolls is used, then the rolling stand can process material with compact design, but the roundness of the rolled material becomes insufficient and the cross-section assumes a polygon-like shape
Solution Approach 1:
The patent combines multiple rolling stands with three rolls each into a single integrated unit where the rolls of different stands are arranged concentrically around a common rolling axis. This merging of multiple rolling functions into one compact structure allows the material to be processed by multiple roll sets sequentially, progressively improving roundness while maintaining a space-efficient design.
Solution Approach 2:
The invention transitions from a conventional linear arrangement of rolling stands to a radial/concentric arrangement where rolls are positioned at different radii around a central axis. This dimensional reorganization allows material to be subjected to rolling forces from multiple directions simultaneously or sequentially, effectively improving cross-sectional roundness without increasing the footprint area.
2Adaptability or versatility
If the radial position of rolls is adjustable for setting caliber, then different diameters can be produced, but the adjustment mechanism becomes complex and difficult to operate automatically
Solution Approach 1:
The patent employs a universal adjustment mechanism where a single eccentric device controls the radial position of all rolls simultaneously. This multi-functional mechanism serves multiple purposes: it adjusts the caliber by changing roll radius, maintains synchronous positioning of all rolls, and enables both manual and automated operation modes through a unified interface, thereby reducing overall system complexity.
Solution Approach 2:
The invention introduces an eccentric mechanism as an intermediary between the actuation source and the rolls. The eccentric converts rotational motion into precise radial displacement, providing a simple mechanical interface that translates small angular adjustments into controlled changes in roll caliber. This intermediary mechanism simplifies the direct connection between actuators and rolls while enabling accurate caliber adjustment.
3Shape
If multiple rolling stands are arranged sequentially to improve roundness, then material can be stretched and rolled to smaller diameter, but the number of stands and device complexity increases
Solution Approach 1:
The patent merges multiple sequential rolling stands into a single integrated unit with concentrically arranged rolls. Instead of placing three separate rolling stands one after another, the invention combines their rolling functions into one structure where rolls from different logical stands are arranged at different radii around a common axis, achieving the same progressive deformation effect in a compact configuration.
Solution Approach 2:
The invention reorganizes the sequential arrangement of rolling stands along a linear axis into a radial arrangement around a central rolling axis. This dimensional transformation allows multiple rolling operations to be performed in a compact radial space rather than requiring extended linear space, effectively reducing the number of discrete stands needed while maintaining the progressive deformation sequence.
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
The solution ensures uniform load distribution, high flexibility in positioning, and efficient adjustment of roll diameter, improving material roundness and simplifying maintenance by reducing the need for multiple stands.
Implementation Method 1
One technical solution for adjusting the roll positions relative to the rolling axis is the eccentric adjustment. By rotating the eccentric bushings, the rolls can be adjusted radially with respect to the rolling axis
Data Source
Figure 1A~1B
Figure 1C~1D
Figure 2A~2B
AI summary
The present application relates to a rolling stand (1) for rolling metallic bars, wires or tubes along a rolling axis, comprising a stand housing (10) whose outer surface (12) as viewed along the rolling axis has at least six side surfaces (14.1-14.6) arranged offset by a rotation of 60° around the rolling axis, wherein two side surfaces (14.1, 14.4, 14.2, 14.5, 14.3, 14.6) form a pair of side surfaces (14.1-14.6) lying parallel to each other. It further comprises three rollers (20.1-20.3) mounted on a roller shaft, surrounding the roller axis in a star shape, which together form a caliber (21) and whose radial position relative to the roller axis is adjustable for setting the caliber (21), and an adjustment connection (30) arranged on the outside (12) for introducing an adjustment torque for setting the caliber (21).The adjustment connection (30) has a transmission shaft which is parallel to a pair of the parallel side surfaces.