Machining Station Barrier Interlock for Safe Robot Loading

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Solution Overview

Problem

Existing machining stations with automated loading robots pose a hazard to operators due to the risk of accidental clamping or movement of machine parts during automatic processing, as operators need to access the machining area for intervention or maintenance.

Innovation Solution

An automatic machining station with a movable barrier that defines a safety zone, which can be extended to block access to the machining area and only allow automated processing when the barrier is in the extended position, ensuring operator safety by physically and visibly blocking the safety area.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a loading robot is used for automated workpiece insertion and removal, then productivity is improved through automation, but safety deteriorates due to the risk of accidental clamping or movement of machine parts during automatic processing

Engineering Contradiction:

Improveautomation of loading and unloadingVSAvoidhazard to operator from moving machine parts

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

A barrier is introduced as an intermediary element between the operator and the hazardous machining area. The barrier physically blocks access to the safety zone during automated processing, preventing direct contact with moving machine parts while allowing the automated loading robot to operate. This mediator resolves the contradiction by enabling automation to proceed without exposing the operator to hazards.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The workspace is segmented into a hazardous safety zone and a safe operator zone using the barrier. The barrier divides the space such that the operator remains in the safe zone while the loading robot operates in the hazardous zone. This spatial segmentation allows simultaneous operation of automated equipment and human personnel without direct exposure to hazards.

Inventive Principle:

Principle #1Segmentation

2Object-affected harmful factors

If the barrier is extended to block the safety zone, then safety is improved by preventing operator access to hazardous areas, but ease of operation deteriorates as operators cannot easily access the machining area for intervention or maintenance

Engineering Contradiction:

Improveprotection from moving machine partsVSAvoidaccess to machining area for intervention

Core Design Contradiction:

Object-affected harmful factorsVSEase of operation

Solution Approach 1:

The barrier is designed as a dynamic element that can move between extended and retracted positions. During automated processing, the barrier extends to block the safety zone and prevent operator access. When intervention or maintenance is required, the barrier retracts to allow operator access to the machining area. This dynamic behavior resolves the contradiction by adapting the barrier's state to the operational requirements.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The barrier operates periodically, extending during automated processing phases and retracting during intervention or maintenance phases. This periodic action pattern allows the system to alternate between safety mode (barrier extended) and accessibility mode (barrier retracted), resolving the contradiction between protection and ease of operation.

Inventive Principle:

Principle #19Periodic action

3Reliability

If the barrier position is monitored with a position detector, then reliability is improved by ensuring the barrier is in the correct position, but device complexity increases due to additional monitoring components

Engineering Contradiction:

Improveensuring barrier position for safetyVSAvoidadditional position detector and control system

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

A position detector provides feedback about the barrier's position to the control system. The control system receives this feedback and can verify whether the barrier is in the extended or retracted position, ensuring safety protocols are followed. This feedback mechanism resolves the contradiction by providing reliable position information that enhances safety while maintaining manageable system complexity through straightforward monitoring.

Inventive Principle:

Principle #23Feedback

Data Source

PatentEP4566752A1Automatic machining station for machining workpieces with integrated barrier for a safety area

Publication Date: 2025.06.11 LORENSCHEIT THOMAS

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AI summary

An automatic machining station (1) for machining workpieces is disclosed. It comprises a machining machine (2) and a loading device (5). The machining machine (2) has a machining space (3) provided with a closable loading opening. The loading device (5) has a loading robot (6) for the automated insertion and removal of workpieces into and from the machining space (3) of the machining machine (2). A controller for the automated operation of the machining station (1) is provided. A safety zone is defined in an area of the machining station (1) adjacent to the loading opening. The machining station (1) has a barrier (7) that can be moved from a retracted position, in which the safety zone is released and freely accessible to operating personnel, to an extended position, in which the safety zone is blocked.A position detector connected to the control system monitors the position of the barrier (7) and transmits a release signal to the control system when the barrier (7) is in the raised position. The control system is configured to enable an automated processing sequence only when it receives the release signal.