Resilient Intermediate Element for Uniform Band Finishing
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Solution Overview
Problem
Existing band finishing devices face challenges in providing consistent and high pressing forces over a workpiece surface, especially with irregular geometries, and often result in excessive material removal and deformation, particularly at oil outlet holes.
Innovation Solution
A device with flexurally resilient intermediate elements that transmit pressing forces from pressing elements to a finishing band, featuring force-receiving and force-transmitting surfaces oriented in a V-shaped manner, allowing for even force distribution and reduced deformation, and using materials like spring steel and elastomers for enhanced friction and adaptability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If rigid pressing elements are used, then imprecisions in initial geometry of workpiece can be compensated, but the pressing elements cannot provide consistent high pressing forces and compensation is limited by finishing band resilience
Solution Approach 1:
The pressing element is designed with a resilient body that can dynamically adapt its deformation to maintain consistent pressing force. The body deforms elastically under load, allowing the pressing element to accommodate variations in workpiece geometry while maintaining stable force transmission to the finishing band through the piston-cylinder mechanism.
Solution Approach 2:
The pressing element uses a resilient body with specific material properties (elastic modulus, damping characteristics) that allow it to change its mechanical parameters under different loading conditions. This enables the element to provide consistent pressing force across varying workpiece geometries by adjusting its deformation characteristics rather than maintaining a fixed rigid structure.
2Shape
If soft and yielding pressing elements are used, then planar contact of finishing band on workpiece is achieved, but the pressing elements deform significantly and lead to excessive material removal
Solution Approach 1:
The pressing element features a differentiated structure with a resilient body for contact adaptation and a rigid piston for force transmission. The local quality of each component is optimized: the resilient body deforms to achieve planar contact and compensate for geometry variations, while the rigid piston maintains consistent pressing force, preventing excessive deformation and material removal.
Solution Approach 2:
The resilient body acts as an intermediary between the rigid piston and the workpiece surface. It receives the pressing force from the piston and transmits it to the finishing band while deforming to achieve planar contact. This intermediary function allows the system to combine the benefits of rigid force transmission with flexible contact adaptation without the drawbacks of either extreme.
3Area of stationary object
If soft pressing elements are used, then contact over large area is achieved, but the oscillating and rotating movement produces significant deformation making dimensional stability difficult
Solution Approach 1:
The resilient body is designed with specific damping characteristics that allow it to dynamically respond to oscillating and rotating movements. The material and geometry of the resilient body are optimized to absorb vibrations and maintain stable deformation patterns, ensuring consistent contact area and pressing force despite the dynamic working conditions.
4Area of stationary object
If a pressing band supporting the rear side of finishing band is used, then contact over large area is achieved, but the available pressing forces are relatively low and unevenly distributed
Solution Approach 1:
The resilient body serves as an intermediary that concentrates and transmits pressing force from the piston to the finishing band. Rather than distributing force passively through a pressing band, the resilient body actively transmits force while deforming to achieve contact, resulting in both high pressing forces and adequate contact area.
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 enables high pressing forces to be applied uniformly across the workpiece surface, minimizing material removal and deformation, while accommodating varying workpiece diameters and initial geometries, thus improving the precision and efficiency of the finishing process.
Implementation Method 1
A flexurally resilient intermediate element is disposed so as to transmit a pressing force from one of the pressing elements to the finishing band
Implementation Method 2
using materials like spring steel and elastomers for enhanced friction and adaptability
Data Source
AI summary
A device for finishing a workpiece includes two pressing elements and a holding apparatus for holding the pressing elements. A finishing band is pressable against a workpiece surface to be finished. A flexurally resilient intermediate element is disposed so as to transmit a pressing force to the finishing band by means of a force-receiving surface and by means of a force-transmitting surface. The intermediate element or a plurality of them is configured to transmit pressing forces, which are offset relative to one another in a circumferential direction of the workpiece surface, to the finishing band. The force-transmitting surfaces of the intermediate element or the plurality of them are oriented in a substantially V-shaped manner relative to one another, and are substantially planar in an undeformed initial state and have a curvature in a same direction as the workpiece surface when there is a pressing force.