Curved Cutting Tool Holder for Coolant Flow and Chip Ejection
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Solution Overview
Problem
Existing cutting tool holders with angular parts at the front end hinder efficient coolant supply to the cutting edge and cause clogging with cutting chips due to improper flow direction and chip ejection.
Innovation Solution
A holder design with a first curved surface that widens from the front end to the back, eliminating angular parts, allowing for efficient coolant flow and smooth chip ejection by incorporating a curved or straight line extension from the insertion hole's edge without angular interruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the holder has an angular part at the front end, then the holder structure is simple and easy to manufacture, but the coolant flow direction is changed and coolant supply efficiency to the cutting edge is reduced
Solution Approach 1:
The holder front end is designed with a curved surface instead of an angular part, creating a smooth transition that maintains coolant flow direction without abrupt changes. This curvature eliminates dead zones and ensures efficient coolant delivery to the cutting edge while still being manufacturable through standard machining processes.
2Ease of manufacture
If the holder has a flat part with wide area at the front end, then the holder structure is simple, but cutting chips cannot flow smoothly and clogging occurs
Solution Approach 1:
The curved surface at the holder front end creates a smooth, rounded profile that allows cutting chips to flow continuously without encountering abrupt edges or flat surfaces where they could accumulate. The curvature guides chips away from the holder, preventing clogging and maintaining high productivity.
3Device complexity
If the holder has an angular part at the front end, then the holder structure is simple, but coolant flow direction is changed and coolant cannot be efficiently supplied to the cutting edge
Solution Approach 1:
By replacing the angular part with a curved surface, the holder maintains relatively simple geometry while eliminating the harmful effect of abrupt direction changes. The curved profile smoothly guides coolant flow toward the cutting edge without requiring complex multi-directional flow paths or additional coolant channels.
Data Source
Figure 1(a)~1(d)
Figure 2
Figure 3(a)~3(d)
AI summary
[Object] To provide a holder with which coolant can be introduced to a cutting edge part efficiently and which has excellent debris discharge properties, and to provide a cutting tool equipped with this holder. [Solution] A cutting tool (10) for which an insert (1) having a rod-shaped shank part (2) and a cutting edge part (3) is inserted into an insertion hole (21) provided at the tip of a holder (20) and thus is affixed to the holder (20), wherein, when viewed from the side, the tip of the holder (20) includes a first curved surface part which widens toward the rear and has a curved line that extends rearward from the rim of the aperture of the insertion hole (21), or has a straight line that extends from the rim of the aperture of the insertion hole (21) and a curved line that continues rearward from said straight line, with no corner parts.