Interlocked Cylindrical Setup Doors for Wide-Access Machining Cells
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Solution Overview
Problem
Conventional machining systems have limited opening widths due to small operation angles of operator doors and increased manufacturing costs from complex gear systems in setup stations.
Innovation Solution
A machining system with a setup station featuring partially cylindrical outer and inner doors that rotate on concentric circular tracks, an interlocking mechanism for synchronized operation, and a controller with an interlock circuit to manage door states and pallet transfer operations, ensuring maximum opening width and safety with a simple mechanical structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a single operator door is used in conventional setup stations, then the structure is simple, but the opening width is limited and safety isolation is insufficient
Solution Approach 1:
The operator door is divided into two separate doors (first operator door and second operator door) that can operate independently. Each door provides safety isolation for its respective side, allowing the opening width to be maximized while maintaining safety. The first operator door isolates the operator side, and the second operator door isolates the pallet transfer device side, resolving the contradiction between wide opening and safety isolation.
2Ease of operation
If ring gears are added to door elements to enable synchronized rotation, then the doors can rotate in association with each other, but the manufacturing cost increases dramatically
Solution Approach 1:
An interlocking mechanism serves as an intermediary between the first and second operator doors to enable synchronized rotation. This mechanism includes a rotation detecting device on one door that detects rotation and transmits signals to control the other door's rotation accordingly. This approach achieves synchronized operation without requiring complex ring gears attached to each door element, significantly reducing manufacturing costs while maintaining ease of operation.
3Length of moving object
If the operator door operation angle is limited to less than 180°, then the door structure remains compact, but the opening width when accessing pallets is small
Solution Approach 1:
By dividing the operator door into two separate doors (first operator door for operator side and second operator door for pallet transfer device side), each door can be optimized independently. The first operator door can rotate through a larger angle to provide wide opening width for operator access to pallets, while the second operator door manages the pallet transfer device side. This segmentation allows maximum opening width without requiring the entire door structure to occupy excessive space.
4Reliability
If complex gear systems are used for door element rotation, then synchronized operation is achieved, but the device complexity and manufacturing cost increase
Solution Approach 1:
An interlocking mechanism with rotation detecting devices serves as an intelligent intermediary between the two operator doors. When one door rotates, the detecting device senses the rotation and automatically controls the other door to rotate in coordination. This electronic/control-based approach replaces complex mechanical gear systems, maintaining reliable safety isolation while significantly reducing mechanical complexity and improving system reliability.
Data Source
AI summary
A machining system comprises a machining device that machines a workpiece, a set-up station with which pallet workpiece attachment/detachment is carried out, and a pallet conveyance device that conveys the pallet between the machining device and the set-up station. A partially cylindrical operator door, which can rotate around a set-up table on which the pallet is mounted, includes a partially cylindrical outer door and a partially cylindrical inner door which rotate following coaxial circular trajectories of different radii. The set-up station is provided with an interlocking mechanism that causes the outer door and the inner door to rotate in an interlocked manner so that a shielded state is constantly maintained between the operator side and the pallet conveyance device side.