Dual-Tool Chamfering for Internal and External Gear Teeth
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Solution Overview
Problem
Existing tools for producing roof ridge-shaped chamfers on internally and externally toothed gearwheels require significant time and adjustment for switching between machining internal and external toothing due to the need for large travel paths and complex tool adjustments.
Innovation Solution
A tool design with two chamfering tools, one on the end section and one on the middle section of the tool carrier, where the chamfering tools are positioned to rotate on different-sized impact circles, allowing for minimal adjustment path and quick switching between internal and external toothing machining without tool or fixture changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single chamfering tool is used on the end section of the tool carrier, then the tool structure is simple, but the tool requires large travel paths and complex adjustments to switch between machining internal and external toothing
Solution Approach 1:
The tool carrier is divided into multiple sections (end section and middle section) with separate chamfering tools positioned on each. This segmentation allows each tool to be dedicated to specific machining tasks (internal or external toothing), eliminating the need for large travel paths and complex adjustments when switching between machining operations.
Solution Approach 2:
The invention positions chamfering tools not only on the end section but also on the middle section of the tool carrier, utilizing the axial dimension of the tool carrier. This dimensional expansion allows tools to be arranged at different axial positions, enabling simultaneous or rapid alternation between machining internal and external toothing without requiring large radial or angular adjustments.
2Area of stationary object
If chamfering tools are positioned on the end section of the tool carrier, then the installation space is minimized, but the tools collide with the gearwheel during machining of large gearwheels
Solution Approach 1:
The invention utilizes the axial dimension of the tool carrier by positioning chamfering tools on both the end section and middle section. This axial distribution allows the tools to operate at different radial distances from the gearwheel center, reducing collision risk during machining of large gearwheels while maintaining compact installation space.
Solution Approach 2:
Different sections of the tool carrier are assigned different functions: the end section chamfering tool is optimized for certain machining conditions while the middle section tool is optimized for other conditions. This local specialization allows each tool to operate in its optimal position, minimizing collision risk while maintaining space efficiency.
3Adaptability or versatility
If two counter-rotating tools with axes aligned at an angle are used to machine internal and external toothing, then the machining capability is comprehensive, but the tools require large travel paths and extensive adjustments to switch between operations
Solution Approach 1:
The tool carrier is designed as a universal platform that can accommodate multiple chamfering tools positioned at different locations (end section and middle section). This multi-functional design allows a single tool carrier to perform both internal and external toothing machining operations by simply positioning the appropriate tool, eliminating the need for complex adjustments and tool changes.
Solution Approach 2:
The chamfering tools are pre-positioned on the tool carrier at specific locations optimized for their respective machining tasks. This preliminary positioning eliminates the need for complex adjustments during operation, as the tools are already configured for their specific functions before machining begins.
Data Source
AI summary
The invention provides a tool, a method and a machine with which roof ridge-shaped chamfers can be produced on teeth of an internally and externally toothed gearwheel with minimised changeover times during tool set up. For this purpose, a tool according to the invention comprises a tool carrier having a holding section for attachment in a tool holder and a chamfering tool, which is held on the end section of the tool carrier, said end section being associated with the other end face, and during use describes an impact circle with its cutting edge, the diameter of said circle being determined by the radial distance of the cutting edge of the chamfering tool from the axis of rotation of the tool. According to the invention, at least one further chamfering tool is attached in a middle section of the tool carrier which is offset relative to the end section provided with the chamfering tool towards the holding section of the tool carrier. At the same time, the further chamfering tool is held with its cutting edge at a radial distance from the axis of rotation of the tool, which is greater than the radial distance of the cutting edge of the chamfering tool held on the end section of the tool holder. A method according to the invention and a machine according to the invention are based on the use of tools according to the invention.