Cutting Insert Raised-Surface Locking Against Lift and Turning
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Solution Overview
Problem
Existing cutting tools fail to securely hold the cutting insert in place during machining, leading to potential lifting and reduced precision due to insufficient force, causing edge position shifts.
Innovation Solution
The cutting insert features raised parts on its peripheral side surface and a groove system that allows the tool body to press the insert firmly downward, preventing lifting and relative movement, with a polygonal shape and flat surfaces for enhanced stability and chip management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a groove fitting with a body holding surface or irregularities at the peripheral side surface are provided to prevent cutting insert turning, then turning prevention is improved, but sufficient pressing force downward is not provided and the cutting insert may be lifted during cutting
Solution Approach 1:
The peripheral side surface is divided into multiple peripheral side surface parts, each equipped with raised parts. This segmentation allows the tool body to apply distributed pressing forces at multiple locations, effectively preventing both lifting and turning of the cutting insert while maintaining stability during cutting operations
Solution Approach 2:
The invention transitions from two-dimensional groove fittings to three-dimensional raised parts with inclined surfaces. The raised parts extend in the end surface direction and provide inclined surfaces that engage with the tool body, creating mechanical interlocking that prevents lifting while the groove system prevents turning, thereby solving both stability issues simultaneously
2Strength
If the cutting insert is held by a screw or fixing lever to the holder, then the cutting insert is fixed to the body, but large cutting resistance may cause the cutting insert to move relative to the holder, shifting the edge position
Solution Approach 1:
The invention changes the geometric parameters of the cutting insert by adding raised parts with specific inclinations and heights. These dimensional changes create mechanical engagement features that increase fixing strength and prevent relative movement between the cutting insert and holder, thereby maintaining edge position precision during cutting operations
Data Source
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AI summary
A cutting insert (11) is provided, which can be prevented from being lifted from a tool body (10). The cutting insert (11) includes two end surfaces (20, 21) opposed to each other, a peripheral side surface (22) extending between the two end surfaces (20, 21) , a cutting edge (23) provided at an intersecting edge between at least one of the two end surfaces (20, 21) and the peripheral side surface (22), and a fixing hole (24) provided in an end surface direction (X) from the first end surface (20) to the second end surface (21). The peripheral side surface (22) is provided with raised parts (50) changing in height in the end surface direction (X).