Eight-Edge Indexable Insert Structure for Longer Tool Life
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Solution Overview
Problem
Existing cutting tools with single-edged inserts have a limited service life, as the cutting edge wears down quickly, necessitating frequent replacement, which is inefficient and costly.
Innovation Solution
An 8-slice indexable insert design with a base body divided into cutting, support, and contact areas, featuring multiple cutting edges and chip evacuation grooves, allowing for sequential use and easy manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If a single-edged insert is used, then the insert is simple in structure and easy to manufacture, but the service life is limited and the insert becomes unusable after one cutting edge wears down
Solution Approach 1:
The insert is divided into multiple cutting edges (8 cutting edges arranged in 4 groups of 2) on a single base body, allowing sequential use of each cutting edge. This segmentation enables the insert to be reused multiple times after rotation, extending service life while maintaining a relatively simple overall structure.
Solution Approach 2:
The insert design allows dynamic reconfiguration of cutting edges through rotation and flipping operations. The 4 groups of cutting edges can be activated in sequence by rotating the insert 90 degrees or flipping it, providing dynamic extension of service life without requiring multiple separate inserts.
2Duration of action of moving object
If multiple cutting edges are arranged on an indexable insert, then the service life is extended, but the manufacturing complexity increases
Solution Approach 1:
The 4 groups of cutting edges are arranged asymmetrically at different radial positions and angular orientations on the base body. This asymmetric arrangement allows all 8 cutting edges to be accessed through simple 90-degree rotations and flips, simplifying the indexing mechanism while maximizing the number of usable cutting edges.
Solution Approach 2:
A single base body serves multiple functions by incorporating 8 different cutting edges that can be used in sequence. The base body acts as both the structural support and the carrier for multiple cutting edges, eliminating the need for multiple separate inserts and simplifying inventory management.
3Ease of operation
If the facing edge projects beyond the mounting surface, then free access to the workpiece is ensured, but the structural stability may be reduced
Solution Approach 1:
The facing edge is designed to project locally beyond the mounting surface only in the specific area where it contacts the workpiece, while the rest of the base body maintains a compact structure for stability. This localized projection ensures adequate access to the workpiece without compromising overall structural integrity.
Data Source
Figure 1
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AI summary
The invention relates to an 8-slice indexable insert (1) with a base body (4) having two plane-parallel side surfaces (5) and four circumferential surfaces (6), wherein a central bore (7) with a central axis (8) leads through the base body (4) from one of the side surfaces (5) to the other of the side surfaces (5), and wherein the base body (4) is approximately cuboid in shape, wherein the base body (4) is divided along the central axis (8) into a first cutting area (9) with the first side surface (5), a central contact area (10), and a second cutting area (11) with the second side surface (5), wherein the first cutting area (9) and the second cutting area (11) are each rotated about the central axis (8) by a defined angle relative to the contact area (10), and wherein the circumferential surfaces (6) are each divided into a first cutting surface (12), a contact surface (13), and a second cutting surface (14).such that the four contact surfaces (13) of the circumferential surfaces (6) form the contact area (10), the four first cutting surfaces (12) with the first side surface (5) form the first cutting area (9), and the four second cutting surfaces (14) with the second side surface (5) form the second cutting area (11), wherein each of the first and second cutting surfaces (12, 14) has a main cutting edge (15) and a face edge (16), wherein the respective main cutting edge (15) extends at the transition between a cutting surface (12, 14) and a side surface (5), and wherein the respective face edge (16) extends at the transition of the cutting surface (12, 14) to an adjacent cutting surface (12, 14), and wherein the main cutting edge (15) and the face edge (16) of each cutting surface (12, 14) merge into one another, and wherein the respective cutting surface (12, 14) The trough (18) extending from the face cutting edge (16) along the main cutting edge (15) has a groove for the removal and shaping of chips.