Grooving Blade With Lateral Damping for Vibration Control
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Solution Overview
Problem
Existing grooving tools experience vibrations and reduced tool-life due to weak dynamic stiffness, leading to poor surface quality, despite optimizations in cutting insert geometry and damping means, there is a need for further reduction in vibrations while maintaining optimized chip breaking capabilities.
Innovation Solution
A grooving blade with a damping means projecting laterally from both major surfaces, having a width greater than the blade, and being releaseably fixed, to effectively dampen vibrations during machining, combined with a cutting insert geometry optimized for chip breaking and coolant passage design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a thin blade with a cutting insert pocket is used for grooving operations, then the tool can access narrow slots and perform parting operations, but the dynamic stiffness of the blade becomes weak causing vibrations and oscillations during machining
Solution Approach 1:
The damping means is made to project laterally from the blade in a direction perpendicular to the blade's major surfaces, extending into a third dimension. This lateral projection allows the damping means to be positioned away from the workpiece while still effectively damping vibrations in the blade, resolving the contradiction between accessing narrow slots and maintaining stability.
2Adaptability or versatility
If the blade length is increased to accommodate larger workpiece diameters, then the tool can perform parting operations on larger workpieces, but tool deflection increases due to larger overhang
Solution Approach 1:
By positioning the damping means laterally away from the workpiece rather than along the blade length, the system can accommodate longer blades for larger workpieces without proportionally increasing deflection. The lateral projection of damping means provides vibration control independent of blade overhang length.
3Manufacturing precision
If damping means is added to reduce vibrations, then surface quality and tool-life improve, but the device complexity increases
Solution Approach 1:
The damping means utilizes a elastomeric material that can be formed as a thin, flexible component projecting from the blade. This approach provides effective vibration damping while maintaining a relatively simple tool structure, as the elastomeric material can be molded into the required shape and attached to the blade without complex assembly.
4Reliability
If the damping means is made large to improve vibration damping, then vibration reduction effectiveness increases, but the blade width must be increased accordingly
Solution Approach 1:
The damping means projects laterally from the blade in a direction perpendicular to the blade's major surfaces, utilizing the third dimension for its development. This allows the damping means to achieve large damping effectiveness without increasing the blade width, as the damping mass extends away from the blade rather than across it.
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 significantly reduces vibrations and improves tool-life by absorbing energy out of phase with the blade's oscillation, enhancing slot quality and tool stability, while maintaining the benefits of optimized chip breaking and coolant access.
Implementation Method 1
a damping means is fixed to the blade and wherein the damping means projects laterally with respect to at least one major surface of the blade for damping of vibrations during machining
Implementation Method 2
significantly reduces vibrations and improves tool-life by absorbing energy out of phase with the blade's oscillation
Data Source
AI summary
A grooving blade for chip removing machining includes a cutting insert pocket and a damping arrangement fixed to the blade. The damping arrangement projects laterally with respect to at least one major surface of the blade. A grooving tool and a method of grooving a metallic workpiece are also disclosed.