Skiving Cutter Helical Grooves Load Distribution
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Solution Overview
Problem
Skiving cutters experience reduced cutting edge life due to high load on cutting edges from continuous cutting in the circumferential direction, leading to shorter tool lifespan compared to intermittent cutting in gear shaping.
Innovation Solution
A skiving cutter with a cylindrical shape featuring helical tooth grooves and cutting edge grooves that divide each cutting edge part into sections, a barrel-shaped outer periphery with varying diameters, and specific rake, peripheral relief, and side relief angles to distribute load and enhance cutting efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If skiving cutter performs continuous cutting in circumferential direction, then machining efficiency is improved, but load on cutting edges increases and cutting edge life decreases
Solution Approach 1:
The cutting edge is divided into multiple segments along the axial direction by forming cutting edge grooves. This segmentation distributes the cutting load across multiple sections, preventing any single section from bearing excessive load during continuous circumferential cutting, thereby extending cutting edge life while maintaining machining efficiency.
Solution Approach 2:
The invention transitions from conventional single-plane cutting edges to three-dimensional helical tooth grooves with cutting edge grooves that create multi-level cutting sections. This dimensional transformation allows the cutting edge to engage the workpiece in a staggered manner along the axial direction, distributing load over time and space during continuous rotation.
2Manufacturing precision
If gear shaping is performed with pinion cutter moving back and forth, then complete gear generation is achieved, but return stroke reduces machining efficiency
Solution Approach 1:
The skiving cutter performs continuous cutting in one forward direction along the axial path without requiring return strokes. The helical tooth grooves and cutting edge grooves enable the entire circumferential surface to be machined in a single continuous motion, eliminating idle return movements and achieving complete gear generation with uninterrupted useful action.
Solution Approach 2:
The invention employs dynamic engagement of multiple cutting edge sections along the axial direction. As the cutter rotates and moves axially, different sections of the cutting edge engage the workpiece at different times, creating a continuous cutting action that progresses along the axial path without interruption or reversal.
Data Source
AI summary
This cylindrical cutter for skiving comprises a plurality of cutting edge parts in the circumferential direction by having tooth grooves be formed between circumferentially adjoining cutting edge parts with the tooth grooves being formed into a helical shape twisting in the axial direction. Cutting edge grooves are each formed in the cutting edge parts so as to divide the cutting edge parts into multiple sections in the length direction of the tooth grooves.