Wire Processing Machine Roller Blind Safety Interlock
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Solution Overview
Problem
Wire processing machines face operational safety and accessibility challenges due to moving parts and potential tool breakages, which can lead to injuries and equipment malfunctions, necessitating improved protective measures.
Innovation Solution
A roller blind protective device that can be moved between open and closed positions to prevent operator access during operation, equipped with a contact zone that generates a signal for emergency shutdown in case of contact, and integrated with viewing windows for monitoring the forming process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protective hood is used to cover the work area, then operator safety is improved, but accessibility to the work area deteriorates
Solution Approach 1:
The protective hood is designed to be movable between open and closed positions rather than fixed, allowing dynamic adjustment based on operational needs. This resolves the contradiction by enabling the hood to provide protection during operation (improving safety) while being open during setup and maintenance (improving accessibility).
Solution Approach 2:
The state of the protective hood changes from open to closed position based on operational parameters. During machine operation, the hood is closed to protect the operator; during setup and maintenance, the hood is open to allow access. This parameter change resolves the contradiction between safety and accessibility.
2Reliability
If the protective device is made fixed and closed, then operator protection is improved, but ease of access for setup and maintenance deteriorates
Solution Approach 1:
The protective device incorporates movable elements (hinged hood, roller blind) that can transition between open and closed states, eliminating the need for fixed structures. This dynamic design provides full protection when closed while maintaining easy access when open, resolving the contradiction between protection and accessibility for maintenance.
Solution Approach 2:
The protective device is divided into separate functional elements (hood, roller blind, contact zones) that can be independently operated. This segmentation allows the protective function to be activated only when needed, while maintaining full accessibility during setup and maintenance operations.
3Reliability
If a hinged protective hood is used, then operator safety is improved, but space requirements and device complexity increase
Solution Approach 1:
The protective elements are designed to nest or fold into compact configurations when not in use. The hinged hood can be folded back, and the roller blind can be retracted, minimizing space requirements while maintaining full protective coverage when deployed.
Solution Approach 2:
The protective device uses dynamic, space-efficient mechanisms (hinges, rollers) rather than fixed extensions, allowing the same protective function to be achieved with minimal space occupation in both open and closed states.
Data Source
Figure 1~2
Figure 3A~3C
Figure 4~5
AI summary
A wire processing machine (100) for producing shaped parts, in particular springs, by shaping wire, comprises a machine front wall (120), a shaping unit having at least one shaping tool which is arranged in a working region (150) on a front side of the machine front wall, a feed unit for feeding wire to the shaping unit, a cutting unit for cutting off a completed shaped part from the fed wire after completion of a shaping operation, a control unit (180) for controlling the feed unit, the shaping unit, and the cutting unit according to an NC control program, and a protection device (260) for temporarily covering the working region (150) during operation of the wire processing machine. The protection device (260) comprises a roller blind (250) which can be moved between an open position and a closed position, wherein in the open position it is possible for an operator to access the working region, and in the closed position access is prevented. The roller blind comprises a contact area (270) which is located on the inner side of the roller blind (250) facing the shaping unit at the height of the working region (150) if the roller blind is in the closed position, wherein the contact area is designed such that, on impact of an object, for example the wire (D), on the contact area, a contact signal indicating the contact is generated which can be transmitted to the control unit.