Swiss Turning Insert Ridge for Bidirectional Machining
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Solution Overview
Problem
Swiss turning inserts are limited to machining in one direction due to their design, which restricts their ability to efficiently machine workpieces held close to a bushing in Swiss-style CNC machines, necessitating repositioning for secondary machining operations.
Innovation Solution
The design of the chip former arrangement for Swiss inserts, featuring a cutting edge surrounding a ridge with specific sub-edges and chip surfaces, allows for machining in both primary and secondary directions, providing equal or improved finish and tool life compared to conventional inserts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If Swiss turning inserts are designed with conventional ridge configurations, then machining in the primary direction is achieved, but machining capability in secondary directions is lost
Solution Approach 1:
The cutting edge is segmented into multiple sub-edges (first sub-edge, second sub-edge, third sub-edge) with distinct functions. The first and second sub-edges are configured for primary direction machining, while the third sub-edge enables secondary direction machining. This segmentation allows the single ridge structure to perform multiple machining directions without requiring multiple separate tools.
Solution Approach 2:
The ridge structure is designed with multi-functional cutting edges that can machine in both primary and secondary directions. The first chip surface and second chip surface are both configured to work with different sub-edges, enabling the same ridge to serve multiple machining purposes. This universal design eliminates the need for repositioning the tool or workpiece for secondary machining operations.
2Adaptability or versatility
If the cutting edge is modified to enable multi-directional machining, then versatility is improved, but finish quality in the primary direction may deteriorate
Solution Approach 1:
Different portions of the cutting edge are given different qualities and configurations optimized for their specific functions. The first and second sub-edges maintain configurations optimized for high-quality finish in the primary direction, while the third sub-edge is specifically configured for secondary direction machining. The first and second chip surfaces are also differently configured to optimize chip flow and finish quality for their respective machining directions.
Solution Approach 2:
The patent provides more than sufficient cutting edges for primary direction machining (first and second sub-edges), ensuring that the primary machining function is not compromised. The additional third sub-edge is added specifically for secondary direction capability. This partial action approach ensures that adding multi-directional capability does not detract from the optimized performance in the primary direction.
3Adaptability or versatility
If chip surfaces are configured for bidirectional machining, then tool versatility is enhanced, but chip control may become more difficult
Solution Approach 1:
The chip former arrangement is extended into a third dimension by adding the upwardly extending ridge with multiple chip surfaces at different levels and orientations. The first chip surface and second chip surface are configured at different positions and angles, allowing chips from primary and secondary direction machining to be controlled separately. This dimensional approach to chip control manages complexity by providing dedicated chip flow paths for each machining direction.
Data Source
AI summary
A swiss insert includes a chip former arrangement. The chip former arrangement includes a ridge separated on each side from a cutting edge's sub-edge by a chip surface. In a side view, each sub-edge extends in a straight line.