Cutting Insert Recess Layout for Smaller-Diameter Tool Bodies
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Solution Overview
Problem
Existing cutting tools with columnar tool bodies and multiple cutting inserts cannot be downsized due to interference between the inserts when attempting to reduce the tool diameter, preventing the cutting of smaller and finer parts.
Innovation Solution
A cutting insert design featuring a through hole with a recessed part on the lower surface side of the flank, allowing for closer arrangement of inserts without interference, enabling a reduced tool diameter and downsizing of the cutting tool.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the tool body diameter is reduced to downsize the cutting tool, then the cutting tool can process smaller parts, but the cutting inserts interfere with each other and cannot be mounted
Solution Approach 1:
The invention introduces a recessed part on the lower surface side of the cutting insert that extends in the depth direction (vertical dimension). This dimensional extension allows the insert to be positioned closer to the tool center without interfering with adjacent inserts, effectively utilizing the third dimension to resolve the spatial conflict caused by reduced tool diameter.
Solution Approach 2:
The recessed part of one cutting insert nests with the protruding part of the adjacent cutting insert. This nested configuration allows multiple inserts to be arranged closely together in the radial direction while maintaining sufficient clearance, enabling the tool body to be downsized without causing insert interference.
2Area of stationary object
If multiple cutting inserts are arranged closer together, then the tool diameter can be reduced, but the inserts interfere with each other
Solution Approach 1:
By extending the recessed part in the vertical depth direction, the invention creates additional spatial separation between adjacent inserts without increasing the radial footprint. This allows inserts to be arranged closer in the radial direction while maintaining clearance through vertical separation.
Solution Approach 2:
The recessed part acts as an intermediary spatial zone between adjacent cutting inserts. This recessed region provides a buffer space that prevents direct interference between inserts while allowing them to be positioned closer together, effectively mediating the spatial conflict.
3Length of stationary object
If the tool body is made thinner, then the cutting tool can be downsized, but the cutting inserts cannot be mounted due to interference
Solution Approach 1:
The recessed part extends in the depth direction (vertical dimension) of the cutting insert, utilizing the third dimension to create necessary clearance. This allows the tool body to be made thinner in the radial direction while maintaining sufficient space for insert mounting through vertical separation.
Data Source
AI summary
Provided is a cutting insert configured to be able to realize downsizing of a cutting tool. A cutting insert includes: an upper surface and a lower surface facing each other and having a plurality of corner parts; a side surface connecting the upper surface and the lower surface and forming intersecting edges with the upper surface and the lower surface, respectively; and a through hole that has a central axis extending from the upper surface to the lower surface and that is formed for penetration from the upper surface to the lower surface. A corner cutting edge arranged at a position corresponding to a corner part of the upper surface, a minor cutting edge connected to a first end of the corner cutting edge, and a major cutting edge connected to a second end of the corner cutting edge are formed on the intersecting edge between the upper surface and the side surface. A flank of the corner cutting edge and a recessed part located on the lower surface side of the flank of the corner cutting edge are formed on the side surface.