Boring Bar Layout With Offset Actuators for Active Vibration Damping
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Solution Overview
Problem
Boring bars used in machining operations experience vibrations due to cutting forces, leading to noise, impaired surface finish, and tool breakage, which existing active damping systems have not adequately addressed.
Innovation Solution
A boring bar with at least two electrically controlled vibration actuators, each with a moveable damping mass, are arranged in a longitudinal series with their working axes angularly offset to effectively counteract vibrations in different directions, optimizing damping capabilities and allowing for efficient counteraction of radial and tangential forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single vibration actuator is used in the boring bar, then the device complexity is reduced, but the ability to counteract vibrations in multiple directions is insufficient
Solution Approach 1:
The patent transitions from a single-axis actuator to a multi-axis configuration by arranging at least two actuators with their working axes angularly offset from each other. This dimensional expansion enables the system to counteract vibrations in multiple directions simultaneously, addressing the limitation of single-direction damping while managing complexity through systematic spatial arrangement.
Solution Approach 2:
The vibration damping function is segmented into multiple independent actuators, each responsible for specific directional components. By dividing the damping task across multiple actuators with angularly offset working axes, the system achieves comprehensive multi-directional vibration control while maintaining manageable complexity through functional segmentation.
2Reliability
If multiple actuators with angularly offset working axes are arranged in the boring bar, then the vibration damping performance is improved, but the device complexity increases
Solution Approach 1:
The patent employs angularly offset working axes arranged in three-dimensional space within the boring bar body. This spatial configuration allows multiple actuators to operate independently in different directions while maintaining compact integration, thereby improving vibration damping reliability without excessive increase in overall device complexity.
Solution Approach 2:
Multiple actuators with angularly offset working axes are merged into a single integrated boring bar structure. The actuators are arranged with their working axes angularly offset from each other and positioned to work together as a unified vibration damping system, achieving reliable multi-directional control while consolidating components within the bar body.
3Manufacturing precision
If the working axes of actuators are angularly offset from each other, then the ability to counteract radial and tangential forces is optimized, but the manufacturing complexity increases
Solution Approach 1:
The patent implements angularly offset working axes in three-dimensional space, with at least two actuators positioned to provide radial and tangential vibration damping. This spatial arrangement optimizes the ability to counteract forces in different directions, improving surface finish quality, while the actuators are integrated into the boring bar structure to manage manufacturing complexity.
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 provides accurate and quick damping of vibrations, improving the surface finish and reducing the risk of tool breakage by effectively counteracting cutting forces, thereby enhancing machining performance.
Implementation Method 1
at least two electrically controlled vibration actuators for active vibration damping of the boring bar. Each one of said at least two actuators comprises a moveably arranged damping mass and is configured, by movement of the damping mass, to generate vibratory forces
Data Source
AI summary
A boring bar for a non-rotating boring tool includes an elongated body configured for attachment to a support structure of a metal cutting machine and arranged to carry a tool part provided with a cutting element. At least two electrically controlled vibration actuators are arranged for active vibration damping of the boring bar. Each actuator includes a moveably arranged damping mass configured to generate vibratory forces in parallel with a working axis of the actuator that is perpendicular to a center axis of the damping mass. Each actuator is a single-axis actuator having one single working axis, wherein the actuators are arranged with their working axes angularly offset from each other. The actuators are arranged in a longitudinal series in the elongated body with the center axis of the damping mass of each actuator coinciding with a longitudinal axis of the elongated body.