Four-Edge Cutting Insert Geometry for Thin Small-Diameter Machining
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing cutting inserts that allow switching of four cutting edges become too thick, making it difficult to machine small diameter workpieces effectively.
Innovation Solution
A cutting insert design featuring first and second constraining surfaces with cutting edges and flanks, where the angle between the first constraining surface and the flank is greater than 90°, allowing for a reduced thickness while enabling the switching of four cutting edges by changing the mounting direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cutting edges are arranged to allow switching of four cutting edges by rotating the cutting insert, then the number of usable cutting edges increases, but the thickness of the cutting insert becomes too large
Solution Approach 1:
The cutting edges are arranged in a three-dimensional configuration rather than simply stacking them in a straight line. By utilizing spatial arrangement in multiple dimensions and optimizing the angular positions of cutting edges around the insert body, four cutting edges can be accommodated within a reduced thickness profile.
Solution Approach 2:
The patent optimizes geometric parameters including the angles between cutting edges, the radial and axial positions of each cutting edge, and the overall shape of the insert body. By carefully adjusting these parameters, the thickness is minimized while ensuring all four cutting edges remain accessible and functional.
2Length of moving object
If the cutting insert thickness is reduced to machine small diameter workpieces, then the adaptability to small workpieces improves, but the number of switchable cutting edges may be limited
Solution Approach 1:
By transitioning from a one-dimensional linear arrangement to a multi-dimensional spatial configuration, the insert accommodates four cutting edges in a compact thickness while maintaining accessibility through rotational positioning.
Solution Approach 2:
Multiple cutting edges are integrated into a single compact insert body rather than using separate inserts. The design merges four cutting functions into one replaceable unit, achieving both thickness reduction and maintained versatility.
3Adaptability or versatility
If cutting edges are positioned to maximize the number of switchable edges, then the versatility increases, but the structural complexity of the insert increases
Solution Approach 1:
The cutting insert is designed as a universal component that performs multiple cutting functions through a single standardized structure. The geometric configuration and mounting interface are optimized to accommodate four different cutting edges while maintaining a consistent, relatively simple overall structure that simplifies manufacturing and replacement.
Data Source
AI summary
A cutting insert which can be used with a total of 4 cutting edges being switched over, and of which thickness can still be reduced, and a cutting tool equipped with this cutting insert are provided. The cutting insert includes: a pair of first constraining surfaces which face each other in a rotating direction of a body; a pair of second constraining surfaces which face each other in a direction toward a rotational center axis of the body; cutting edges disposed respectively along a pair of sides located at positions facing each other, of sides framing the first constraining surface; and flanks which are disposed at positions adjacent to the cutting edges respectively in the rotating direction. In this cutting insert, an angle formed by the first constraining surface and the flank, which are adjacent to each other across the cutting edge, is larger than 90°.