Slotted Cutting Insert Geometry for Fixation and Slope Machining
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Solution Overview
Problem
Existing cutting inserts face challenges in secure fixation to holders when angle conditions are small, making secure attachment difficult, and when angles are large, performing slope machining is hindered.
Innovation Solution
A cutting insert design with a lower surface featuring slots and protrusions where the angle between the slots' imaginary extension line and the upper surface intersection is less than the angle between the lower surface and side surface intersection, ensuring secure fixation and facilitating slope machining by varying these angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the angle between the second cutting edge and the protrusion extension line is made equal to the angle between the ridge line and the protrusion extension line to secure fixation, then the cutting insert can be securely fixed to the holder, but performing slope machining becomes difficult when the angles are relatively large
Solution Approach 1:
The invention divides the fixation structure into multiple independent slots instead of using a single protrusion structure. The lower surface has a first plurality of slots and a second plurality of slots arranged in different directions, allowing each slot to independently contribute to fixation while accommodating different machining requirements including slope machining.
Solution Approach 2:
The slot structure serves multiple functions: it provides secure fixation in normal machining conditions and enables slope machining capabilities. The first plurality of slots and second plurality of slots work together to achieve both fixation security and machining versatility, making the cutting insert adaptable to different machining scenarios.
2Adaptability or versatility
If the angle between the ridge line and the protrusion extension line is made relatively small to enable slope machining, then slope machining becomes easier, but secure fixation to the holder becomes difficult
Solution Approach 1:
The fixation system is segmented into multiple slots with different orientations. The first plurality of slots provides fixation in one direction while the second plurality of slots provides fixation in another direction, allowing the cutting insert to be securely fixed without requiring large angles that would hinder slope machining.
Solution Approach 2:
The invention transitions from a single-dimensional protrusion structure to a two-dimensional slot array structure. By arranging slots in multiple directions (first plurality and second plurality), the system achieves fixation security through multi-directional constraints rather than relying on large single-angle geometries, thereby enabling slope machining.
Data Source
AI summary
A cutting insert has: an upper surface; a lower surface; a side surface, having a first surface and a second surface disposed opposite each other between the upper surface and the lower surface; and a first cutting edge. The lower surface has a plurality of slots extending from a side of the first surface to a side of the second surface. In addition, when viewed from a side of the lower surface, if the angle between a ridge line on which the upper surface and the first surface intersect and an imaginary extension line of the plurality of slots is defined as θ1, and the angle between a ridge line on which the lower surface and the first surface intersect and the imaginary extension line is defined as θ2, then θ2>θ1.