Asymmetric Gear Skiving Tool Layout for Single-Pass Tooth Machining
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Solution Overview
Problem
Current methods for producing gear wheel toothing by skiving are inefficient in terms of speed and cost, as they require multiple machining passes and complex, expensive tools to achieve high cutting performance.
Innovation Solution
A skiving tool with unevenly arranged cutting edges on a rotatable carrier body, allowing for localized machining of the workpiece circumference, where cutting edges engage differently in the interdental spaces to increase material removal and reduce thermal load, enabling faster and more cost-effective production of large module gears.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If cutting edges are arranged uniformly on the skiving tool, then the tool structure is simple and symmetric, but the cutting performance is limited and multiple machining passes are required
Solution Approach 1:
The patent applies asymmetry by arranging cutting edges unevenly on the carrier body instead of uniformly. Specifically, some cutting edges are positioned at different radial distances from the center of gravity of the carrier body, creating an asymmetric distribution pattern. This asymmetric arrangement allows different cutting edges to engage the workpiece at different positions and angles during rotation, enabling more effective material removal in a single machining pass and improving overall cutting performance without requiring multiple passes.
2Productivity
If multiple machining passes are used to produce gear toothing, then the precision can be maintained, but the production time increases and productivity decreases
Solution Approach 1:
The patent applies segmentation by dividing the material removal task among multiple cutting edges arranged at different positions on the carrier body. Each cutting edge is responsible for removing material from specific regions of the interdental spaces during a single machining pass. This segmented approach allows the entire toothing to be produced in one pass rather than requiring multiple sequential passes, thereby increasing production speed while maintaining precision through the coordinated action of all cutting edges.
3Productivity
If cutting edges engage both tooth flanks simultaneously, then the machining is efficient, but the cutting edges are heavily loaded and may be damaged
Solution Approach 1:
The patent applies local quality by designing different cutting edges with different radial positions relative to the carrier body's center of gravity. This creates local variations in how each cutting edge engages the workpiece - some cutting edges engage one tooth flank more strongly while being guided past the other flank at a distance, while others have different engagement patterns. This localized differentiation allows each cutting edge to operate under optimized loading conditions, reducing peak loads and improving durability while maintaining high material removal rates.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for high cutting performance with reduced machining passes and eliminates the need for expensive tools, enabling quick and cost-effective production of gear wheels with large module sizes, while maintaining precision and preventing cutting edge damage.
Implementation Method 1
a skiving tool with a plurality of radially protruding cutting edges distributed uniformly around the circumference, so that essentially identical conditions result for each subsequent tooth gap to be produced
Implementation Method 2
both the skiving tool and the workpiece are twisted, whereby a chip in the tooth gap to be produced is peeled off the workpiece
Data Source
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AI summary
The invention relates to a gear skiving tool (10) for machining the teeth of a gear by gear skiving, comprising a rotatable carrier body (12) and radially projecting cutting edges (14) connected to the carrier body (12) in a common radial plane for machining a workpiece (24), wherein at least some of the cutting edges (14) are arranged and/or aligned unevenly relative to one another. The invention further relates to a corresponding method (26). Due to the irregular distribution of the cutting edges (14) on the carrier body (12), the gear skiving process allows for locally distributed machining of the circumference of the workpiece (24), thus enabling the rapid and cost-effective production of gear teeth.