Magnetic Clamping Assembly With Sealed Flat Securing Surface
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Solution Overview
Problem
Magnetic clamping devices face issues with maintaining liquid-tightness and flatness of the securing surface, which can lead to reduced clamping force due to moisture ingress and debris accumulation, and require complex machining processes that are inefficient and prone to errors.
Innovation Solution
A magnetic clamping device with a baseplate featuring hollow housing portions for magnetic force generating mechanisms, a nonmagnetic metal frame body for integral joining with the baseplate, and a detection coil for monitoring the clamping state, ensuring liquid-tightness and flatness while minimizing magnetic flux leakage and facilitating efficient machining.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a magnetic clamping device uses a base member with recessed housing holes for magnetic force generating mechanisms, then the device can secure workpieces using magnetic force, but liquid-tightness at the securing surface cannot be ensured and moisture can infiltrate the magnetic force generating mechanisms
Solution Approach 1:
The device is divided into separate functional components: the base member with securing surface, the magnetic force generating mechanisms in recessed housing holes, and the protective cover member. This segmentation allows each component to be optimized independently - the base member provides magnetic clamping function while the cover member provides liquid-tight protection, resolving the contradiction between reliability and structural complexity.
Solution Approach 2:
The cover member acts as an intermediary element between the external environment and the magnetic force generating mechanisms. It seals the recessed housing holes to prevent moisture infiltration while allowing the magnetic mechanisms to function normally, thus protecting the internal components without complicating the overall structure.
2Force
If the securing surface is made flat to improve contact with workpiece, then clamping force is improved, but machining complexity increases and flatness is difficult to maintain
Solution Approach 1:
The securing surface functionality is segmented from the base member structure. The base member provides the structural support while the cover member and magnetic force generating mechanisms work together to create the effective securing surface. This allows the securing surface to be maintained flat for good contact without requiring the entire base member to be machined to high precision.
Solution Approach 2:
The recessed housing holes are pre-formed in the base member before assembling the magnetic force generating mechanisms. This preliminary action allows the securing surface to be prepared in advance with appropriate flatness, and the magnetic mechanisms are then installed into these pre-prepared recesses, simplifying the overall manufacturing process while maintaining clamping force.
3Device complexity
If hollow housing portions are provided through the baseplate for magnetic force generating mechanisms, then the device structure is simplified, but the metal frame body is prone to damage during machining
Solution Approach 1:
The hollow housing portions are pre-formed in the baseplate before the metal frame body is installed or fully processed. This preliminary preparation allows the baseplate structure to be simplified while the frame body is protected during subsequent machining operations, as the hollow portions are already in place to provide structural context and protection.
Solution Approach 2:
The metal frame body is positioned within the hollow housing portions before final machining operations. This beforehand positioning cushions and protects the frame body from damage during machining, while the overall structure remains simple due to the integrated hollow housing design in the baseplate.
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
The solution provides stable liquid-tightness and high clamping force by preventing moisture ingress and maintaining magnetic flux, while simplifying the machining process and reducing the risk of damage to the metal frame body, thus ensuring reliable and efficient operation.
Implementation Method 1
a plurality of securable magnetic force generating mechanisms which are incorporated into this base member and which use magnetic force to cause the object to be clamped to be secured and be held to the securing surface
Implementation Method 2
The magnetic polarity of the AlNiCo magnet can be reversed by causing electricity to flow through the magnetic polarity switching coil
Implementation Method 3
because these are employed in combination with permanent magnets, it is possible to cause these states to continue to persist even after flow of electricity therethrough is terminated
Data Source
AI summary
A magnetic clamping device is provided with a magnetic force generating mechanism at which a housing cover body comprising soft magnetic material is arranged centrally at a hollow housing portion, a nonmagnetic metal frame body comprising a nonmagnetic body is made to engage with the outside circumference thereof, a plurality of arcuate nonreversible permanent magnets are arranged in annular fashion within an annular magnet housing space at the back of this nonmagnetic metal frame body, a reversible permanent magnet and a magnetic polarity switching coil disposed peripherally with respect thereto are provided at the back of the housing cover body, and a base cover body that blocks a back opening of the hollow housing portion is provided, the magnetic clamping device being characterized in that the metal frame body is joined in integral fashion to the housing cover body and the baseplate.