Indexable Cutting Insert Mounting for Deep Groove Turning
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Solution Overview
Problem
Existing indexable cutting inserts lack sufficient support against cutting forces and are limited in performing groove turning and parting operations with large cutting depths.
Innovation Solution
The design of an indexable cutting insert with a central mounting portion and multiple circumferential cutting portions, featuring specific mounting elements and rotational symmetry, allowing for enhanced support and secure clamping contact, suitable for both groove turning and parting operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional indexable cutting inserts are used, then the tool structure is simple, but the support against cutting forces is insufficient
Solution Approach 1:
The cutting insert is divided into a central mounting portion and multiple circumferential cutting portions. This segmentation allows each portion to be independently optimized for its function while collectively providing enhanced support against cutting forces through the distributed mounting elements across multiple locations.
Solution Approach 2:
The invention transitions from a single-plane mounting structure to a three-dimensional arrangement with mounting elements distributed both radially and circumferentially. This dimensional expansion creates multiple support points that collectively resist cutting forces from various directions, significantly improving overall structural support.
2Productivity
If traditional cutting inserts with limited cutting edges are used, then the device complexity is low, but the productivity is reduced
Solution Approach 1:
The cutting insert incorporates multiple circumferential cutting portions (at least three) arranged around the central mounting portion, each with its own cutting edges. This segmentation enables the insert to perform multiple different cutting operations by indexing to different portions, significantly increasing productivity without requiring multiple separate tools.
Solution Approach 2:
The cutting insert is designed as a multi-functional tool where each circumferential cutting portion can perform cutting operations. By indexing the insert to different positions, a single insert can execute multiple cutting operations that would traditionally require multiple specialized tools, enhancing versatility and productivity.
3Strength
If mounting elements are positioned closer to the cutting portions, then the support against cutting forces is improved, but the clamping contact stability may be compromised
Solution Approach 1:
Each circumferential cutting portion is associated with its own mounting elements, creating localized support zones near the cutting action. This segmentation ensures that mounting elements are positioned optimally close to each cutting portion to provide immediate support against cutting forces while maintaining stable clamping contact through the distributed arrangement.
Solution Approach 2:
The mounting elements are strategically positioned at different radial distances from the central axis, with each mounting element's flanks extending to different extents. This local variation in mounting element geometry allows optimization of clamping contact stability for each specific cutting portion while maintaining overall structural support.
Data Source
AI summary
A cutting tool has an indexable cutting insert removably secured to a holding portion of an insert holder. The cutting insert has opposing first and second end surfaces with a peripheral side surface extending therebetween and a central mounting portion. The cutting insert has a plurality of cutting portions circumferentially spaced apart about a central axis, each cutting portion having a rake and relief surfaces located on the peripheral side surface. The central mounting portion has a plurality of female type or male type mounting elements having opposing first and second mounting flanks. The plurality of rake surfaces and first mounting flanks face in a first direction about the central axis, the plurality of second mounting flanks face in a second direction about the central axis opposite to the first direction, and each second mounting flank extends further from the central axis than its associated opposing first mounting flank.