Rotating Cutting Tool Guide Insert with Chip-Free Retention
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Solution Overview
Problem
Existing rotating cutting tools with guide inserts face issues of drilling chip accumulation around screw heads, leading to damage and difficulty in screw release due to the design of screw heads and recesses, which causes instability and wear.
Innovation Solution
The guide insert is positioned axially at the level of the retaining means, with no recess for chip accumulation, featuring a radially running through-hole or end-face aperture for the retaining means, and a guide section that is continuous and not divided, along with a pocket or snap lock mechanism for secure attachment without screws, and a cooling passage for improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If screw heads and recesses are used to fasten guide inserts, then the guide inserts can be securely attached to the support part, but drilling chips accumulate around the screw heads causing damage and difficulty in release
Solution Approach 1:
The patent removes the screw head and recess components from the guide insert design. Instead of using traditional screw fastening with recesses that trap chips, the guide insert is fastened directly to the support part without creating chip accumulation zones. This extraction of the problematic screw head structure eliminates the harmful chip accumulation effect while maintaining secure attachment through alternative fastening geometry.
2Ease of repair
If guide inserts are detachably fastened for easy exchange, then maintenance becomes simpler, but chip accumulation around retaining means creates difficulty in releasing screws
Solution Approach 1:
The patent eliminates the screw and recess structure that causes operational difficulty. By removing the traditional screw fastening system with its chip-trapping recesses, the guide insert maintains detachability for easy exchange while eliminating the chip accumulation problem that makes screw release difficult. The simplified fastening design allows maintenance operations to proceed without the interference of compressed chip layers.
3Ease of manufacture
If the guide section is divided into sections by a recess, then the retaining means can be positioned, but the guide section becomes discontinuous creating potential weak points
Solution Approach 1:
The patent merges the guide section into a continuous, uninterrupted structure. By eliminating the recess that divided the guide section into separate parts, the design creates a continuous guide surface that maintains structural integrity and stability. The retaining means is positioned without requiring a discontinuous guide section, combining the benefits of proper fastening placement with an unbroken, stable guide surface.
Data Source
AI summary
A rotating cutting tool includes a single or multi-piece support part having an end face and a circumferential wall, an interchangeable cutting insert provided at or about the end face, and at least one interchangeable guide insert coupled to the support part via a retaining means. The at least one interchangeable guide insert being free of cutting edges and protruding radially relative to the circumferential wall. The at least one interchangeable guide insert including a guide section which protrudes radially furthest outward. The guide section lying axially at the level of the retaining means and offset from the retaining means in the circumferential direction.