Chamfering Internal Gearing via Center Opening Tool Arbor
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Solution Overview
Problem
Existing methods for chamfering internal gearings are inefficient and difficult to access, particularly when dealing with smaller diameters, as they require complex apparatus arrangements and struggle to effectively chamfer edges on both sides of the workpiece.
Innovation Solution
A chamfering apparatus with a rotatably supported tool holder and workpiece holder arrangement, where the chamfer hob is positioned via a tool arbor through the center opening of the workpiece, allowing for easy access to both upper and lower edges, and optionally using two workpiece holders to facilitate chamfer machining on both sides independently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the apparatus is arranged within the center opening of the workpiece, then the chamfering can be performed on internal gearings, but the device complexity increases and accessibility becomes difficult for smaller diameters
Solution Approach 1:
The chamfering apparatus is nested within the hollow cylindrical workpiece structure, with the tool holder and chamfering tool positioned inside the center opening. This nesting approach allows the apparatus to access internal gearing surfaces without requiring external complex arrangements, particularly effective for larger diameter workpieces where sufficient space exists within the center opening.
Solution Approach 2:
The invention transitions from traditional external chamfering approaches to an internal dimension approach by positioning the tool holder and chamfering tool within the center opening of the hollow workpiece. This dimensional change allows access to internal gearing surfaces that would be inaccessible from the external perimeter, particularly for larger diameter components.
2Device complexity
If the tool holder is positioned outside the workpiece, then the apparatus complexity is reduced, but the chamfering tool cannot reach the center opening for effective engagement
Solution Approach 1:
The tool holder is designed with rotational capability, allowing it to move dynamically between an external storage position and an internal working position. This dynamic positioning enables the chamfering tool to be inserted into the center opening only when needed, maintaining apparatus simplicity while ensuring tool accessibility during the chamfering operation.
Solution Approach 2:
A tool arbor serves as an intermediary component, extending from the tool holder through the center opening to position the chamfering tool at the workpiece interior. This intermediary structure bridges the gap between the external tool holder and the internal chamfering location, enabling effective tool engagement without requiring the entire tool holder to be positioned inside the workpiece.
3Device complexity
If a single workpiece holder is used, then the device complexity is reduced, but chamfering both upper and lower edges becomes inefficient
Solution Approach 1:
The workpiece holding function is segmented into two separate workpiece holders, each capable of independently positioning and rotating the workpiece. This segmentation allows simultaneous or sequential chamfering of upper and lower edges by different chamfering tools, significantly improving productivity for hollow cylindrical components that require chamfering on multiple surfaces.
Solution Approach 2:
Multiple workpiece holders and chamfering tools are merged into a single integrated apparatus structure, sharing common support mechanisms and control systems. This combining approach enables multi-sided chamfering operations while avoiding the complexity of completely separate machining systems, maintaining structural efficiency while enhancing productivity.
Data Source
AI summary
The present disclosure relates to an apparatus for chamfering at least one edge of the gearing at the front side of a workpiece having internal gearing comprising at least one rotatably supported workpiece holder for holding the workpiece and comprising at least one rotatably supported tool holder for holding at least one chamfer hob, possibly a chamfer cut hob, wherein the tool holder is arranged and/or arrangeable next to a workpiece held in the workpiece holder and a chamfer hob held in the tool holder is arrangeable by means of a tool arbor in the region of the center opening of the workpiece formed by the internal gearing to be brought into engagement with an edge of the internal gearing on the upper side and/or on the lower side of the workpiece.