Pendular-Cycle Processing Head Safety Control Across Workstations
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Solution Overview
Problem
Machines processing parts in a pendular cycle pose a safety risk to operators due to the potential for tools to protrude over safety partitions, leading to accidental contact and injury, with current solutions either limiting machine efficiency or operator movement.
Innovation Solution
A security system with detection systems and a logic control unit that generates stop signals and warning alerts to prevent the processing head from moving beyond a predetermined position when an operator is detected in the monitoring zone, ensuring safe operation and maximizing workspace usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the safety partition bulkhead height is limited to allow tool movement, then the tool can move freely between working stations, but the operator is exposed to risk of accidental contact with tools
Solution Approach 1:
A detection system acts as an intermediary between the operator and the moving tool. The detection system monitors the operator's position and communicates this information to the control system, which then controls the tool's movement. This intermediary system allows both free tool movement and operator safety by coordinating their interactions.
Solution Approach 2:
The detection system provides continuous feedback about the operator's position to the control system. Based on this feedback, the control system adjusts the tool's movement in real-time, stopping or preventing movement when the operator is in dangerous zones. This feedback mechanism resolves the contradiction by making tool movement responsive to operator position.
2Object-affected harmful factors
If the processing zone is limited to protect operator safety, then operator safety is improved, but the useful working area is significantly reduced
Solution Approach 1:
The processing zone boundaries are made dynamic rather than static. The detection system continuously monitors operator position, and the control system dynamically adjusts the allowable processing zone based on real-time operator location. This allows the full working area to be utilized when operators are in safe positions while maintaining safety constraints when operators are present in dangerous zones.
3Object-affected harmful factors
If the operator's work is limited to delimited zones, then operator safety is improved, but the advantages of pendular cycle work are lost
Solution Approach 1:
The mechanical constraint system that would physically limit operator movement is replaced with an electronic control system. The detection system and control system work together to enforce safety zones through automated tool movement control rather than physical barriers, allowing operators to move freely while maintaining safety and preserving pendular cycle efficiency.
Data Source
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AI summary
Machine for the processing of parts in a pendular cycle (1) comprising: a portal bearing structure (2) which develops along a direction x and which defines an internal space accessible from the front; at least two working stations (3) arranged one after the other and separated by a safety partition bulkhead; a support and actuation group coupled to a tool (5) and to at least a tool-holder magazine (6), the support and actuation group being slidingly coupled to the portal bearing structure (2) so as to be able to translate along the direction x between the at least two working stations (3) above the bulkhead; a security system (100) comprising at least a first detection system (13) associated with a first working station and configured to detect, by generating a first detection signal, the presence and/or passage of a body in a monitoring zone of the first working station; a logic control unit (10) associated with the support and actuation group (7) for tools and the at least a first detection system (13), the logic control unit (10) being configured to stop at least the advance of the support and actuation group (7) for tools when the following conditions occur: the logic control unit (10) receives the first signal; the support and actuation group (7) is located in a second working station; and the support and actuation group (7), moving along the direction x towards the bulkhead (4), passes a first predetermined position (11) of the second working station or the support and actuation group (7) occupies a position comprised between said first predetermined position (11) and the bulkhead (4).