Off-Center Shank Structure for Adjustable Cutting Tool Length
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Solution Overview
Problem
Conventional shanks for head-replaceable cutting tools require extensive time and steps for tool replacement when machining lengths vary, leading to potential guide bush damage due to burrs, as the head position cannot be adjusted to accommodate different machining lengths.
Innovation Solution
A shank with an off-center head attaching part allows for adjustable machining length by positioning the cutting edge off-center, enabling the head position to be changed without exchanging the entire holder, and optionally includes multiple attaching parts and an oil hole for efficient machining.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional coaxial shank is used, then the structure is simple and easy to manufacture, but the head position cannot be changed to accommodate variations in machining length
Solution Approach 1:
The shank is designed with an asymmetric structure where the head attaching part is positioned off-center relative to the shank axis. This allows the cutting edge to be located at different positions along the shank length, enabling adaptation to various machining lengths without requiring multiple shank types or complex adjustment mechanisms.
2Adaptability or versatility
If a stepped head-type holder is used to change head position, then machining length adaptability is improved, but the entire holder must be exchanged which requires considerable time and steps
Solution Approach 1:
The tool system is segmented into two independent parts: the shank (holder) and the head (cutting insert carrier). The off-center attaching part allows the head to be positioned at different locations on the shank. This segmentation enables the head to be replaced or repositioned independently without replacing the entire holder, significantly reducing tool replacement time and steps.
3Length of moving object
If the cutting part is off-center to increase machinable length, then machining length is extended, but conventional stepped heads require entire holder exchange for position changes
Solution Approach 1:
The shank is designed as a universal component with an off-center attaching part that can accommodate multiple heads at different positions. This single shank design serves multiple functions by allowing the head to be repositioned or replaced to achieve different machinable lengths, eliminating the need for multiple specialized holders and simplifying the overall system.
Data Source
AI summary
A shank for a tool bit employing an offset arrangement is provided, the shank being able to respond to various types of machining through replacement of heads and having a structure to save time and steps necessary for such replacement of the heads. A cutting tool having such shank is also provided.A shank 53 of a head-replaceable cutting tool has at least one head attaching part 53A, 53B that is arranged off-center relative to an axis 53X of the shank 53. The axis 53X of the shank 53 corresponds to an axis extending in a longitudinal direction of the shank 53, and the head attaching part 53A, 53B may be arranged so as to be off-center in a direction perpendicular to the axis 53X.