Adjustable Cantilever Damper for Machine Tool Chatter Suppression
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Solution Overview
Problem
Existing vibration suppression devices for machine tools require frequent replacement of elastic members with different thicknesses or materials to match varying vibration frequencies, making them labor-intensive and impractical for real-world applications.
Innovation Solution
A vibration suppression device with a flexible member attached to a structure as a cantilever, featuring a weight on the free end and an adjustable mechanism to change the distance between fixed and free ends, allowing for phase opposition and effective vibration suppression without needing to replace components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If elastic members with different thicknesses or materials are replaced to match varying vibration frequencies, then vibration suppression effectiveness is improved, but device complexity and labor requirements increase
Solution Approach 1:
The patent changes the physical parameters of the flexible member (length, thickness) to adjust the natural frequency of the vibration suppression device. By making the flexible member adjustable in these parameters, the device can adapt to different vibration frequencies without replacing the entire elastic member, thus resolving the contradiction between effectiveness and complexity
Solution Approach 2:
The patent introduces a dynamic adjustment mechanism that allows the flexible member's parameters to be changed during operation or maintenance. This dynamic capability enables the device to adapt to varying vibration conditions while maintaining a single reusable structure, reducing the need for multiple pre-prepared elastic members
2Adaptability or versatility
If elastic members are replaced frequently to match different vibration frequencies, then adaptation to different machine tool configurations is improved, but loss of time and productivity decrease
Solution Approach 1:
The flexible member is designed with adjustable parameters (length, thickness) that can be modified to change the natural frequency. This allows a single flexible member to serve multiple frequency requirements, eliminating the need for frequent replacements and maintaining productivity
Solution Approach 2:
The vibration suppression device is designed to be universally applicable across different machine tool configurations and tool attachments. The adjustable flexible member enables one device to perform multiple functions across different frequency ranges, reducing the need for specialized components for each application
3Adaptability or versatility
If elastic members of various thicknesses are prepared for replacement, then adaptability to different vibration characteristics is improved, but device complexity and inventory requirements increase
Solution Approach 1:
Instead of preparing multiple elastic members with different parameters, the patent uses a single flexible member whose parameters can be changed. This eliminates the need for maintaining an inventory of multiple elastic members while still providing coverage for different vibration frequencies
Solution Approach 2:
The flexible member incorporates a mechanism that allows parameter changes (length, thickness adjustment) during operation. This dynamic adjustability replaces the static approach of having multiple pre-prepared elastic members, simplifying inventory requirements while maintaining adaptability
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
Enables easy adjustment and effective suppression of chatter vibrations across different machine tool configurations and tool attachments, improving machining accuracy and reducing labor and material preparation costs.
Implementation Method 1
chatter vibration generated in the machine tool is transmitted from the support shafts to the weight through the elastic members
Implementation Method 2
the vibration is absorbed by the weight. Hence, chatter vibration can be suppressed
Implementation Method 3
since the weight is less likely to move because of its large inertia, the vibration is absorbed by the weight
Data Source
AI summary
There is provided a vibration suppression device, a machine tool including the device and a vibration suppression method using the device. The vibration suppression device includes a flexible member having a first position F fixed to the structure to be a fixed end of a cantilever and a second position on a free end side; and a weight attached to the flexible member in the second position. The vibration suppression device has an adjustment mechanism for changing a distance between the first position and the second position. Accordingly, it can effectively suppress vibration of a structure, and that can effectively suppress the vibration by easy adjustment when the characteristic of a generated vibration is different.