Modular Active-Damping Boring Bar for Cutting Vibration Control
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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 design incorporating a damping module with an electrically controlled vibration actuator, where the actuator is integrated within a separate damping module between the main and front parts of the boring bar, allowing for flexible adaptation and positioning to effectively counteract vibrations near the cutting element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an active damping system with vibration actuators is integrated into the boring bar, then vibration damping capability is improved, but device complexity increases
Solution Approach 1:
The boring bar is divided into distinct modular components: a main part, a front part, and separate damping modules. Each damping module can be independently attached or detached between the main and front parts, allowing the vibration damping system to be configured separately from the structural components. This segmentation enables the damping system to be added or modified without redesigning the entire boring bar.
Solution Approach 2:
The damping modules are designed to be dynamically attachable and detachable from the boring bar structure using tie rods. This dynamic configuration allows the system to be adapted to different machining requirements - the damping modules can be attached when vibration control is needed and detached when not required, making the system flexible rather than permanently complex.
2Reliability
If damping modules are positioned close to the cutting element, then vibration counteraction effectiveness is improved, but ease of manufacture deteriorates
Solution Approach 1:
The damping modules are separated from the main boring bar structure and positioned as independent components between the main part and front part. This segmentation allows the damping modules to be manufactured separately using standard positioning features (tie rods passing through passages), simplifying manufacturing while enabling flexible positioning close to the cutting element for optimal vibration control.
Solution Approach 2:
The tie rods serve as intermediary elements that connect the damping modules to the boring bar structure. These tie rods with passages provide a standardized interface that simplifies the attachment process, allowing damping modules to be positioned optimally near the cutting element without requiring complex integration into the main bar structure.
3Reliability
If multiple damping modules are used, then vibration damping performance is improved, but device complexity increases
Solution Approach 1:
The system uses multiple identical damping modules that can be attached in series between the main part and front part. Each module is a standardized component with the same interface features (tie rod passages), allowing multiple modules to be added simply by repeating the same attachment process rather than designing a complex integrated system.
Solution Approach 2:
Each damping module is designed as a universal component that can function independently or in combination with other identical modules. The standardized tie rod interface and passage configuration allow the same component to be used in various positions and combinations, reducing overall system complexity through component standardization while enabling enhanced damping performance through multiple modules.
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
This design enhances vibration damping capabilities, reduces noise and tool breakage, and improves surface finish by accurately responding to and counteracting cutting forces, with the ability to easily modify damping characteristics and actuator placement for optimal performance.
Implementation Method 1
at least one electrically controlled vibration actuator for active vibration damping of the boring bar, wherein this actuator is configured to generate vibratory forces
Implementation Method 2
at least one damping module arranged between the front end of the main part and the rear end of the front part
Data Source
Figure 1~2
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AI summary
A boring bar (2) for a non-rotating boring tool comprising: - an elongated main part (10) configured for attachment to a support structure of a metal cutting machine; - a front part (12) arranged to carry a tool part (4) provided with a cutting element (5); and - at least one damping module (14) which is arranged between a front end (10a) of the main part (10) and a rear end (12b) of the front part (12) and which is provided with an electrically controlled vibration actuator (16) configured to generate vibratory forces for active vibration damping of the boring bar. The front part (12) is connected to the main part (10) via the at least one damping module (14), wherein the main part, the front part and the at least one damping module together form an elongated body (6), and wherein the at least one damping module (14) constitutes a length section of the elongated body.