Rotary Tool Bearing Preload for Precise Holding and Safe Removal
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Solution Overview
Problem
Existing bearing systems for rotary conversion tools in substrate conversion machines face challenges in adjusting functional clearances, leading to potential damage during mounting and removal, and instability due to insufficient clamping, which affects the precision and rigidity of tool holding.
Innovation Solution
A bearing system with two end rolling bearing devices and an intermediate rolling bearing device, equipped with a mechanical actuator that applies a radial preload force to achieve zero or minimal clearance, ensuring precise positioning and effective holding rigidity, and can be deactivated for easier tool removal and mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the functional clearances between the bearings and the ends of the rotary tools are made small, then the precision and rigidity of tool holding is improved, but the risk of damaging the rotary tools during mounting and removal increases
Solution Approach 1:
The bearing system transitions from a static clearance configuration to a dynamic adjustable system. The functional clearance between the bearings and rotary tool ends can be adjusted during operation - tightened to zero or minimal clearance during operation for precision, and loosened during maintenance for safe tool removal. This dynamic adjustment resolves the contradiction between needing small clearances for precision and avoiding damage during mounting/removal.
2Stability of the object's composition
If the ends of the rotary tools are clamped firmly to prevent shifting, then the stability and parallelism of the tools are improved, but the difficulty of mounting and removing the tools increases
Solution Approach 1:
The clamping force applied to the rotary tool ends is made dynamically adjustable rather than fixed. During operation, the bearing system maintains firm clamping to ensure tool stability and parallelism. During maintenance phases, the clamping force can be reduced or released, allowing easy mounting and removal of tools. This dynamic control of clamping force resolves the contradiction between firm clamping for stability and ease of tool changes.
3Manufacturing precision
If a mechanical actuator is added to apply radial preload force to adjust clearances, then the precision positioning and holding rigidity are improved, but the device complexity increases
Solution Approach 1:
The mechanical actuator system is designed to be self-regulating and automatically maintains the required radial preload force. The actuator applies force through the intermediate rolling bearing device to take up clearances between the end rolling bearing devices and rotary tool ends, then maintains this preload automatically during operation. This self-service capability reduces the need for complex external control systems while achieving precise positioning and holding rigidity.
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
The bearing system provides precise relative positioning and effective holding rigidity for rotary tools, reducing vertical clearance and facilitating easier tool handling during maintenance, while maintaining operational stability and efficiency.
Implementation Method 1
at least one mechanical actuator configured to exert a radial preload force at the intermediate rolling bearing device
Implementation Method 2
two end rolling bearing devices, at least one intermediate rolling bearing device interposed between the two end rolling bearing devices, the two end rolling bearing devices and the intermediate rolling bearing device being intended to engage with an end of the rotary conversion tool
Data Source
AI summary
A bearing for holding a rotary conversion tool (10, 11) that includes two end rolling bearing devices (26, 28), at least one intermediate rolling bearing device (27) interposed between the end rolling bearing devices (26, 28), the end and intermediate rolling bearing devices (26, 27, 28) being intended to engage with an end (10a, 10b, 11a, 11b) of the rotary tool (10, 11), and at least one mechanical actuator (32, 33) configured to exert a radial preload force (Fo, Fo′) at the intermediate rolling bearing device (27).