Parting Blade Holder Structure for Deep-Cut Vibration Stability
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Solution Overview
Problem
Existing parting blades and tool holders face challenges in maintaining stability and reducing vibrations during long overhang and large depth of cut applications, particularly in machining operations requiring high feed rates and deep cuts.
Innovation Solution
The development of an elongated parting blade with a unique insert seat configuration, featuring non-parallel lower and rear seat abutment surfaces, and a tool holder design that allows for a compact tool head and extended pocket length, providing enhanced stability and chip evacuation capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the overhang length of the parting blade is increased to enable deep cut operations, then the depth of cut capability is improved, but the blade becomes more susceptible to bending and vibrations
Solution Approach 1:
The patent reorients the parting blade from a horizontal configuration to a vertical configuration, where the blade extends downward from the tool holder. This dimensional change allows the blade to engage workpieces at depths exceeding 100mm while maintaining stability, as the vertical orientation aligns the blade's longitudinal axis with the cutting forces, reducing bending moments and vibrations compared to traditional horizontal overhang configurations
2Productivity
If the feed rate is increased to improve productivity, then the machining efficiency is improved, but the blade experiences increased vibrations and reduced stability
Solution Approach 1:
The patent introduces adjustable overhang length capability through a movable blade position mechanism, allowing the operator to optimize the blade's engagement depth and orientation dynamically. This enables adaptation to different workpiece geometries and cutting conditions, maintaining optimal stability across varying feed rates and cutting depths, thereby supporting higher productivity without compromising blade stability
3Length of moving object
If the tool holder design is extended to accommodate longer overhangs, then the depth of cut capability is improved, but the tool holder complexity increases
Solution Approach 1:
The patent divides the tool holder into modular components: a standardized shank portion for machine tool mounting, an adjustable tool head section containing the blade clamp mechanism, and an extendable support structure. This segmentation allows the overhang length to be adjusted independently without redesigning the entire tool holder, reducing overall complexity while enabling deep cut operations
Data Source
AI summary
A tool holder includes a tool shank and a tool head connected to the tool shank. The tool head has a rear surface. An insert seat or a blade pocket is partially formed on both the tool head and the tool shank, and extends rearwardly of the tool head's rear surface. Adjacent to at least a portion of a shank side surface there is a reinforcement portion connecting the shank side surface and the tool head.