Machined Portion Collecting Mechanism With Cut-Off Sensing
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Solution Overview
Problem
Traditional collecting mechanisms for machined portions in turning machining suffer from lower accuracy in positioning, leading to material deflection and vibration during cutting, which can impair the quality of the cut sections and cause damage due to dropped parts.
Innovation Solution
A collecting mechanism with a holding unit having a pair of arms that switches between a standby and holding state, using rollers to prevent rubbing and deflection, and a cutting determination sensor to accurately determine the completion of cutting, ensuring the holding unit does not apply extra force during machining and effectively prevents damage by sandwiching the machined portion upon completion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the holding unit is kept closed to sandwich the machined portion during cutting machining, then the machined portion can be prevented from dropping and damaging the machine tool, but the material may deflect and vibrate due to extra force applied during rotation, impairing the quality of the cut section
Solution Approach 1:
The holding unit transitions from a static closed state to a dynamic state that switches between open and closed positions. During cutting machining, the holding unit remains open to avoid interfering with the rotating material. Upon detection of cutting completion, it closes to sandwich the machined portion. This dynamic adaptation resolves the contradiction by providing protection only when needed, without compromising cut quality.
Solution Approach 2:
The system uses a controller that monitors the cutting machining process to detect when the machined portion has been completely cut off. Based on this feedback, the holding unit automatically switches from the open state during cutting to the closed state after cutting completion. This feedback mechanism ensures the holding unit applies force only at the appropriate moment, preventing both damage and deflection.
2Manufacturing precision
If the holding unit is kept open during cutting machining to avoid deflection, then the quality of the cut section is maintained, but the machined portion may drop and crash against the machine tool upon completion of cutting
Solution Approach 1:
The holding unit is positioned in advance near the machined portion during cutting machining, ready to act. Upon detection of cutting completion, it immediately closes to sandwich the machined portion before it can drop. This preliminary positioning combined with rapid response prevents damage without interfering with the cutting process.
Solution Approach 2:
The holding unit dynamically changes its state from open during cutting to closed after cutting completion, adapting its behavior to the process stage. This dynamic transition ensures protection is provided only when necessary, resolving the contradiction between maintaining cut quality and preventing damage.
3Device complexity
If traditional holding mechanisms are used with lower positioning accuracy, then the structure is simpler, but mismatch in position between the rotation center and holding mechanism causes material deflection and vibration
Solution Approach 1:
The controller monitors the cutting process and precisely determines when the machined portion is completely cut off. This accurate timing feedback enables the holding unit to close at the exact moment needed, achieving high positioning accuracy without requiring complex mechanical positioning structures. The feedback-based timing control compensates for the simpler mechanical structure.
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
This solution improves the quality of the cut sections by preventing deflection and vibration, and effectively prevents damage to the machined portions by accurately timing the holding action, ensuring precise collection and reducing machine tool damage from residual materials.
Implementation Method 1
one or more rollers mounted on the main arm body, the roller being rollable on the circumferential surface of the machined portion
Data Source
AI summary
The collecting mechanism includes a holding unit and a controller. The holding unit has a pair of arms, and can sandwich a machined portion with the pair of arms. The holding unit can be switched between a holding state and a standby state. In the holding state, the pair of arms is closed to be in contact with the circumferential surface of the machined portion to sandwich the machined portion. In the standby state, the pair of arms is opened so as to stay near the circumferential surface of the machined portion with a space between the arms and the circumferential surface of the machined portion. The controller monitors whether cutting-off of the machined portion has been completed to keep the holding unit in the standby state before completion of the cutting-off and to switch the holding unit from the standby state to the holding state at the time of completion of the cutting-off.