Magnetic Clamping Status Indication Without Central Control
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Solution Overview
Problem
Existing clamping systems lack a central control system to verify if a workpiece is properly clamped before machining, posing a hazard of damage to the machine or endangering personnel.
Innovation Solution
A clamping system with indicator means using an electropermanent magnet that automatically switches to a signal state indicating its magnetization state, featuring an indicator element moved by magnetic forces to show whether the workpiece is clamped, and sensor means to ensure reliable detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If no central computer system is used to control the work process, then device complexity is reduced and ease of operation is improved, but reliability deteriorates because there is no way to verify whether the workpiece is actually clamped on the clamping plate
Solution Approach 1:
The electropermanent magnet serves itself by automatically changing the magnetic polarity of the indicator magnet through its own magnetization and demagnetization cycles. The indicator element self-actuates based on the magnetic field changes without requiring external sensors or control systems to detect the clamping status.
Solution Approach 2:
The indicator element changes its position parameter in response to changes in the magnetic field parameter. When the electropermanent magnet is magnetized, the indicator magnet's polarity changes, causing the indicator element to move from retracted to extended position, providing a visible signal of the clamping status.
2Reliability
If indicator means are added to continuously signal the magnetization state, then reliability is improved, but device complexity increases
Solution Approach 1:
The indicator function is merged with the electropermanent magnet itself. The indicator magnet is integrated into the magnet structure, and the indicator element is positioned to respond directly to the magnetic field changes. This combines the clamping function and indication function into a single integrated system.
Solution Approach 2:
The indicator magnet acts as an intermediary between the electropermanent magnet's magnetic field and the visible indicator element. The indicator magnet translates the invisible magnetic field changes into visible mechanical displacement of the indicator element, providing a clear signal without requiring complex sensing or display systems.
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
Ensures reliable process control by continuously indicating the clamping status, preventing hazardous situations during machining by ensuring the workpiece is securely held, enhancing functional reliability and fault tolerance.
Implementation Method 1
The indicator element is moved from a position retracted in the receptacle to a position extended from the receptacle, thus forming the signal state, by magnetization of the electropermanent magnet. The indicator element is moved into the extended position by magnetic forces of the magnetized electropermanent magnet
Implementation Method 2
The indicator element is moved into the extended position by magnetic forces of the magnetized electropermanent magnet, specifically against the spring force of a spring
Data Source
Figure 1
Figure 2
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AI summary
The invention relates to a clamping system (1) with at least one electropermanent magnet (3), wherein a workpiece is clamped onto the electropermanent magnet (3) by magnetizing it. Indicating means are provided which automatically switch to a signal state indicating the magnetization of the electropermanent magnet (3) upon magnetization.