Inner Joint Ball Track Machining With Indexed Guide Web Cutting
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Solution Overview
Problem
Current methods for machining inner joint parts of constant velocity joints are inefficient and lack high manufacturing accuracy, as they require separate machining processes for ball tracks and guiding webs, which can lead to increased production time and complexity.
Innovation Solution
A method and device that allow for simultaneous machining of ball tracks and guiding webs in a single clamping operation, where the inner joint part is rotated to different positions to enable mechanical machining of both features without interfering with each other, using tools that maintain a specific radial alignment to the longitudinal axis, allowing for efficient and accurate production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If separate machining processes are used for ball tracks and guiding webs, then manufacturing accuracy can be maintained, but production time increases and productivity decreases
Solution Approach 1:
The patent combines the machining of ball tracks and guiding webs into a single simultaneous machining process. Multiple tools (for machining ball tracks) and (for machining guiding webs) operate at the same time on the inner joint part that is rotated about its longitudinal axis, eliminating the need for separate machining operations and thereby reducing production time while maintaining accuracy through precise tool positioning and synchronization.
2Productivity
If simultaneous machining of ball tracks and guiding webs is performed, then productivity increases, but process complexity increases
Solution Approach 1:
The inner joint part serves multiple functions during the machining process: it is both the workpiece being machined and the rotating carrier that enables sequential access to different features. By rotating the inner joint part about its longitudinal axis, the same workpiece positions different ball tracks and guiding webs into the machining zones of the tools in sequence, allowing one tool to machine multiple features without requiring complex repositioning or multiple specialized fixtures.
Solution Approach 2:
The machining process employs dynamic rotation of the inner joint part about its longitudinal axis during machining. This rotational movement dynamically positions different circumferential features (ball tracks and guiding webs) into the static machining zones of the tools, enabling simultaneous machining of multiple features without requiring the tools or workpiece to undergo complex dynamic adjustments. The rotation speed and synchronization are controlled to match the machining requirements.
3Manufacturing precision
If multiple tools are used for simultaneous machining, then manufacturing accuracy improves, but tool interference may occur
Solution Approach 1:
The patent resolves potential tool interference by utilizing the rotational dimension of the inner joint part. Instead of arranging multiple tools in crowded static positions that might interfere with each other, the solution positions tools at different circumferential locations and uses rotation to bring different features of the workpiece into each tool's machining zone at different times. This transforms a potential 2D spatial conflict into a 3D temporal-spatial solution where tools operate independently without interference.
Data Source
AI summary
Machining ball tracks and guiding webs of an inner part for a constant velocity joint in a clamping arrangement includes mechanical machining of at least one first ball track in a first rotational position; rotating the articulated inner part into a second rotational position for machining at least one further ball track; wherein at least one guiding web is mechanically machined during the rotating of the inner joint part from the first rotational position into the second rotational position. A corresponding device is used for machining ball tracks and guiding webs of an inner joint part.