Diagonal Indexable Cutting Insert for Stable Grooving Clamping
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Solution Overview
Problem
Existing cutting tools for grooving operations in limited spaces lack stability and efficient manufacturing, particularly when accessing rotating workpieces, due to inadequate design and construction for secure clamping and robust cutting edge performance.
Innovation Solution
An indexable cutting insert with a central mounting portion and two cutting portions located in diagonally opposite quadrants, featuring diverging abutment surfaces and rake surfaces, is designed for secure clamping and enhanced cutting performance, allowing only one cutting portion to be operative at a time, with a clamping mechanism that applies force through a specific aperture and support elements for stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a cutting insert has two cutting portions in diagonally opposite quadrants for grooving operations in limited space, then the adaptability for different cutting positions is improved, but the stability and secure clamping become problematic
Solution Approach 1:
The cutting insert is divided into two separate cutting portions located in diagonally opposite quadrants, allowing the insert to be used in different cutting positions by indexing. Each cutting portion can be independently positioned and clamped, providing versatility for different grooving operations while maintaining stability through proper segmentation of the clamping mechanism.
Solution Approach 2:
The abutment elements are positioned asymmetrically on the lower surface of the insert, with specific geometric relationships (first and second local abutment angles) that provide stable clamping in diagonal orientations. This asymmetric design ensures that when the insert is clamped at 45-degree angles, the cutting portions are properly positioned in diagonally opposite quadrants, achieving both adaptability and stability.
2Reliability
If complex abutment surfaces with specific angles and bisector planes are designed for stable clamping, then the stability is improved, but the manufacturing complexity increases
Solution Approach 1:
The abutment elements have specific local geometric properties (first and second local abutment angles, diverging abutment surfaces) that are optimized for stable clamping in specific orientations. Rather than making the entire insert complex, only the local regions where clamping occurs have the specialized geometric features, while other portions of the insert maintain simpler geometries for cutting operations.
Solution Approach 2:
The abutment surfaces are pre-configured with specific angles and orientations during insert manufacturing, so that when the insert is installed in the holder, the stable clamping geometry is already in place. This preliminary configuration of the abutment elements eliminates the need for complex adjustment mechanisms during operation, reducing overall device complexity while maintaining stable clamping.
3Adaptability or versatility
If two cutting portions are located in diagonally opposite quadrants with specific geometric relationships, then the versatility for grooving operations is improved, but the device complexity increases
Solution Approach 1:
The cutting insert is designed with two cutting portions that can both be used for grooving operations, making the single insert universal for multiple cutting positions and operations. By positioning the cutting portions in diagonally opposite quadrants with proper geometric relationships, the insert can perform face grooving, internal grooving, and other operations without requiring multiple different inserts, achieving versatility while keeping the overall design relatively simple.
Data Source
AI summary
An indexable cutting insert has a central mounting portion and two cutting portions. The central mounting portion has opposing upper and lower surfaces. The lower surface has two abutment elements associated therewith, each abutment element having two diverging abutment surfaces forming two abutment angles. The two cutting portions extend away from the central mounting portion, have distal cutting edges, and are entirely located in diagonally opposite imaginary quadrants of four quadrants defined by two mutually perpendicular quadrant planes. Two abutment bisector planes bisecting the two abutment angles and one of the quadrant planes are parallel or coincident. In a top view, the two cutting portions extend away from the central mounting portion in opposite directions. Two cutting bisector lines parallel to the two directions and bisecting the two cutting edges are mutually offset. A cutting tool has an insert holder and the cutting insert removably retained therein.