Cutting Insert Marking for Oval Bore Orientation
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Solution Overview
Problem
Operators face difficulty in determining the orientation of the oval shape of the cutting insert bore portion, especially under poor lighting conditions, due to its small size and the presence of the fastening member, which complicates the removal process of the cutting insert from the insert receiving pocket.
Innovation Solution
A cutting insert with a mark on at least one of its surfaces indicating the orientation of the cross-sectional oval shape of the insert hole, allowing for clear indication of the required direction of rotation for releasing the insert from the clamping screw, which is parallel to the primary dimension of the oval shape, facilitating easy extraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the cutting insert bore is made small to accommodate compact inserts, then the insert size is reduced, but the orientation of the oval bore becomes difficult to determine
Solution Approach 1:
A mark is introduced as an intermediary element on the cutting insert surface to indicate the bore orientation. This mark serves as a mediator between the hidden oval bore geometry and the operator's visual detection system, allowing accurate orientation determination without directly observing the small bore itself.
Solution Approach 2:
The orientation information of the oval bore is copied onto the cutting insert surface through a mark. Instead of requiring direct observation of the bore's orientation, the critical orientation data is replicated on an accessible surface area where it can be easily seen and interpreted.
2Productivity
If the fastening member remains in place during insert removal, then the insert can be quickly indexed, but the oval bore orientation becomes hidden and indistinguishable
Solution Approach 1:
The mark is placed on the cutting insert surface in advance to indicate the bore orientation before the fastening member is removed. This preliminary visual information allows the operator to quickly determine the correct rotation direction without needing to inspect the bore orientation after the fastening member is removed, enabling rapid insert replacement.
Solution Approach 2:
The mark acts as an intermediary that provides bore orientation information without requiring the operator to physically manipulate or remove the fastening member for inspection. The orientation data is transmitted through the mark on the insert surface, maintaining productivity while solving the visibility problem.
3Illumination intensity
If the work area is dimly lit to reduce glare, then operator comfort is improved, but the bore orientation becomes even more difficult to discern
Solution Approach 1:
The bore orientation information is copied onto the cutting insert surface as a visible mark. This allows the operator to detect orientation under reduced lighting conditions without increasing overall work area illumination, maintaining operator comfort while ensuring accurate orientation determination through the high-contrast mark.
Solution Approach 2:
The mark on the cutting insert is designed to provide high visual contrast, potentially using color differences or reflective properties that make the orientation indication clearly visible even in dim lighting conditions. This allows orientation detection without requiring bright work area illumination.
Data Source
Figure 1A~1B
Figure 2A~5B
Figure 6A~7
AI summary
A cutting insert includes a first surface, a second surface and a peripheral surface extending therebetween, and an insert hole extending between the first and second surfaces and having a hole axis. A cross section of at least a portion of the insert hole taken perpendicular to the hole axis has an oval shape. The cutting insert also includes a mark provided on at least one of the first and second surfaces, indicating the orientation of the cross sectional oval shape of the at least a portion of the insert hole.