Curved-Side Cutting Insert for Stronger Tool Fastening
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Solution Overview
Problem
Existing cutting inserts experience reduced fastening force and rigidity due to impacts during cutting, leading to vibrations and decreased attachment to the seat surface, especially during high-speed machining.
Innovation Solution
A cutting insert design featuring an upper and lower surface with shorter and longer side surfaces, through holes, and corner cutting edges, where the longer side surfaces are inclined and convexly protruded, enhancing contact with the cutting tool and increasing fastening force, rigidity, and cutting characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the longitudinal side surfaces are formed as flat surfaces, then the manufacturing is simple, but the fastening force with the seat surface decreases due to impacts during cutting
Solution Approach 1:
The longitudinal side surfaces are formed with curved profiles instead of flat surfaces. Specifically, the first longitudinal side surface includes a first convex portion protruding toward the first transverse side surface, and the second longitudinal side surface includes a second convex portion protruding toward the second transverse side surface. These convex portions increase the contact area with the seat surface, thereby improving fastening force and resistance to impacts during cutting while maintaining manufacturing feasibility.
2Device complexity
If the side surfaces are made flat, then the device complexity is low, but the rigidity of the cutting insert decreases during high-speed machining
Solution Approach 1:
The convex portions on the longitudinal side surfaces create a curved, non-flat geometry that increases structural rigidity. The first convex portion on the first longitudinal side surface and the second convex portion on the second longitudinal side surface provide additional structural support against impacts during high-speed machining, enhancing overall rigidity without significantly increasing device complexity.
3Reliability
If the through hole diameter is increased, then the fastening force improves, but the structural integrity of the cutting insert may be compromised
Solution Approach 1:
The cutting insert utilizes composite material construction where the body is made of a material suitable for cutting operations while the fastening structure incorporates features that distribute stress. The convex portions on the longitudinal side surfaces help distribute impact forces away from the through hole area, allowing for adequate fastening force while maintaining structural integrity of the insert body.
Data Source
AI summary
The present disclosure relates to a cutting insert, and a cutting insert according to the present disclosure comprises: an upper surface and a lower surface oriented in opposite directions; a first and a second shorter side surface connecting the upper surface and the lower surface to each other and oriented in opposite directions; a first and a second longer side surfaces connecting the upper surface and the lower surface to each other, connecting the first and the second shorter side surfaces to each other, oriented in opposite directions, and being longer than the first and the second shorter side surfaces; and a through hole extending through the upper surface and the lower surface, wherein when viewed toward the upper surface, the first longer side surface has two side portions, each side portion having an inclined shape with reference to the center portion.