Workpiece Support With Adjustable Bushing Gap for Bending Control
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Solution Overview
Problem
Machine tools face challenges in supporting elongate and short workpieces effectively, as existing systems struggle to restrict bending during machining, leading to reduced accuracy and increased wear due to the gap between the rotating shaft and the guide bushing.
Innovation Solution
A workpiece support system with a rotating shaft and a guide bushing unit, where the attachment is adjustable to reduce the gap between the shaft and the bushing, allowing for increased stability and reduced bending by displacing in a direction away from or towards the axis, ensuring proper alignment and support for both elongate and short workpieces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a guide bushing is used to support elongate workpieces, then bending restriction is improved, but the gap between the rotating shaft and guide bushing causes increased wear and reduced accuracy
Solution Approach 1:
The attachment is designed to be displaceable relative to the rotating shaft, allowing dynamic adjustment of the gap between the rotating shaft and guide bushing. This enables the system to adapt to different workpiece lengths and machining conditions, maintaining optimal support without excessive wear or bending
Solution Approach 2:
The attachment acts as an intermediary element between the rotating shaft and guide bushing. It provides indirect contact support through the displaceable structure, reducing direct friction and wear while maintaining workpiece stability during machining
2Adaptability or versatility
If the guide bushing holder is made removable, then adaptability to different workpieces is improved, but device complexity increases
Solution Approach 1:
The guide bushing holder is divided into separable components that can be attached or removed independently. This segmentation allows quick adaptation to different workpiece types without requiring complete disassembly of the entire machining system
Solution Approach 2:
The guide bushing holder is designed with universal features that allow it to accommodate both elongate and short workpieces. The same holder structure can be configured for different workpiece types by adjusting or removing components, eliminating the need for multiple specialized holders
3Manufacturing precision
If the attachment is displaceable away from the axis, then the gap reduction capability is improved, but the structural complexity increases
Solution Approach 1:
The attachment utilizes the rotational motion of the rotating shaft itself to achieve displacement. The centrifugal force and rotational dynamics enable the attachment to move outward automatically, reducing the need for complex external actuation mechanisms while maintaining precise gap control
Data Source
AI summary
A workpiece support includes a rotating shaft configured to support a workpiece at a leading end portion, a second support supporting the rotating shaft rotatably about a first axis and configured to move the rotating shaft along the first axis, a first support provided between the tool and the second support along the first axis and including a through hole into which a guide bushing unit is configured to be inserted and into which the leading end portion of the rotating shaft is configured to be inserted, and an attachment provided in contact with an outer surface of the leading end portion of the rotating shaft. The guide bushing unit is configured to support the workpiece when the guide bushing unit is in the through hole. At least a part of the attachment is displaceable in a direction away from the first axis.