Steady Rest With Actuator Rod Passage For Dynamic Centering
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing steady rests for rotationally symmetrical workpieces require complex adjustments and opening to maintain central positioning under machining forces, leading to significant positional shifts, especially with heavy workpieces.
Innovation Solution
A steady rest design with a passage opening in the actuator rod allows for relative movement between adjustment devices, enabling joint horizontal adjustment of steady rest arms and synchronous vertical alignment of the guide slide, maintaining clamping forces without removing contact from the workpiece, using kidney-shaped mouldings and intermediate elements for decoupling force components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the steady rest arms are opened to adjust the central positioning of the workpiece, then the centering can be adjusted, but the clamping forces are released causing significant positional shifts especially with heavy workpieces
Solution Approach 1:
The patent implements dynamic adjustment capability where the steady rest arms can be repositioned while maintaining contact with the workpiece. The adjustment device allows continuous modification of arm positions during machining operations, enabling operators to correct positioning without completely releasing the clamping force, thus maintaining both adjustability and positional accuracy.
Solution Approach 2:
The steady rest arms are pre-positioned to maintain contact with the workpiece surface. The adjustment mechanism is designed to allow incremental position changes from this preliminary contact state, enabling centering adjustments while the arms remain engaged with the workpiece, preventing significant positional shifts.
2Adaptability or versatility
If a complex adjustment device is used to achieve vertical and horizontal alignment of steady rest arms, then the alignment capability is improved, but the device complexity increases significantly
Solution Approach 1:
The adjustment device is segmented into independent vertical and horizontal adjustment mechanisms. Each mechanism handles one degree of freedom separately, allowing straightforward design of each segment rather than attempting to design a single complex mechanism for both directions simultaneously. This reduces overall device complexity while maintaining full alignment capability.
Solution Approach 2:
The adjustment device is designed to perform both vertical and horizontal alignment functions through a unified structure. The same basic adjustment mechanism can be applied in different orientations to achieve both alignment directions, reducing the need for separate specialized mechanisms and thereby reducing overall device complexity.
3Adaptability or versatility
If the steady rest arms are opened for adjustment, then the centering can be modified, but the clamping forces are no longer acting on the workpiece causing loss of positional stability
Solution Approach 1:
The system maintains dynamic stability by keeping the steady rest arms in continuous contact with the workpiece during adjustment operations. The adjustment mechanism allows position changes while the arms remain engaged, ensuring clamping forces are continuously applied and positional stability is maintained throughout the adjustment process.
Solution Approach 2:
The clamping action is maintained continuously during adjustment operations. The steady rest arms remain in contact with the workpiece throughout the adjustment process, ensuring that the useful action of clamping and stabilizing the workpiece continues without interruption, thereby maintaining positional stability.
Data Source
AI summary
A steady rest for centering a rotationally symmetrical workpiece in a housing, a guide slide axially adjustable in the housing, an actuator rod in a form-locking connection with the guide slide, and two control surfaces opposite one-another on the guide slide and configured so that the guide slide has a triangular cross-sectional contour, one tip pointing towards the workpiece and the opposite two tips point in toward the actuator rod, a middle steady rest arm in driving connection with the actuator rod, and two outer steady rest arms each on a side next to the middle steady rest arm, and mounted in a swivelling arrangement in the housing, the first free end of which is in contact with a control surface of the guide slide, the second free end gripping the workpiece, forming a three-point mounting with the middle steady rest arm adapted to hold the workpiece.