Bending Press Control Device for Immediate Emergency Stop
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Solution Overview
Problem
Existing bending press control systems experience time delays and increased adjustment speeds during emergency stops, posing safety risks due to the need for the press beam to cover a specific path before activation, which can lead to overtravel and accidents.
Innovation Solution
A control and regulating device that generates control signals directly from the operator's actuating element movement, comparing it to a default profile or threshold value, allowing for immediate emergency stop activation without overtravel or speed changes, ensuring safer and more efficient operation by integrating a logic module with a processor to evaluate the acceleration profile and trigger emergency stops based on predetermined threshold values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a three-position switching device with pedal-like control element is used for manual operation, then operator safety is improved through controlled adjustment ranges, but time delay occurs during emergency stop activation allowing press beam overtravel
Solution Approach 1:
The patent replaces the mechanical three-position switching device with an electronic control system that uses a movement profile detection means (such as an encoder or sensor) to continuously monitor the actuating element's position and velocity. This electronic substitution eliminates the inherent time delays of mechanical switching by providing continuous feedback and instantaneous response capability, allowing the emergency stop to activate immediately when threshold values are exceeded.
Solution Approach 2:
The invention implements a feedback mechanism where the control device continuously detects the movement profile (position and velocity) of the actuating element and compares it against predetermined threshold values. This closed-loop feedback system enables real-time monitoring and instantaneous emergency stop activation when unsafe conditions are detected, eliminating the open-loop delay inherent in traditional mechanical switching devices.
2Reliability
If traditional position-based control switching is used, then control range safety is maintained, but adjustment speed increases uncontrollably during emergency stop activation
Solution Approach 1:
The control device continuously monitors both position and velocity parameters of the actuating element through the movement profile detection means. By implementing feedback control on both parameters simultaneously, the system can detect when velocity exceeds safe thresholds and immediately trigger emergency stop, preventing uncontrolled speed increases that occur in traditional position-based switching systems.
Solution Approach 2:
The invention transitions from static position-based switching to dynamic parameter-based control by continuously monitoring the movement profile (both position and velocity) of the actuating element. This dynamic approach allows the system to adapt control responses based on real-time motion conditions, enabling precise control of adjustment speed and immediate emergency stop activation when velocity thresholds are exceeded.
3Loss of time
If movement profile detection and comparison with default profile is implemented, then immediate emergency stop activation is achieved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical emergency stop mechanisms with a streamlined electronic control system that uses software-based movement profile comparison. The control device contains a processor that automatically compares detected movement profiles against stored default profiles or threshold values, eliminating the need for complex mechanical linkages, multiple switches, and mechanical trip mechanisms while achieving instantaneous emergency stop response.
Data Source
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AI summary
The invention relates to an open- and closed-loop control device (1) for a driving arrangement (7) of a movable press beam (8) of a bending press (3), in particular a press brake, comprising a protective housing (29) that has an access opening (30) for a foot (25) of an operating person and comprising a pedal-like actuating element (32) arranged in the protective housing (29). At least one detecting means, which is communicatively connected to an open-loop control and monitoring device (2) of the bending press (3) and which is formed by a motion profile detecting means (40), is associated with the actuating element (32).