Magnet Chuck With Segmented N-S Pole Arrangement
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Solution Overview
Problem
Magnet chucks face challenges in generating a strong attractive force for workpieces, especially thin plates, due to magnetic saturation, and often require larger permanent magnets or complex mechanisms for attraction and release.
Innovation Solution
A magnet chuck design utilizing a piston and cylinder configuration with multiple permanent magnets arranged to create pairs of N-poles and S-poles on the workpiece surface, allowing for increased magnetic flux and attractive force, while maintaining compactness and ease of operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a permanent magnet with large magnetic force is selected to attract a heavy workpiece, then the attracting force is improved, but magnetic saturation occurs in thin plate workpieces making it difficult to produce large attracting force
Solution Approach 1:
The permanent magnet is divided into multiple magnets with different magnetic pole arrangements. Instead of using a single large magnet, the invention employs a plurality of permanent magnets (first, second, third, and fourth permanent magnets) arranged in specific configurations. This segmentation allows magnetic flux to be distributed through multiple paths, preventing saturation in thin plate workpieces while maintaining strong overall attracting force.
Solution Approach 2:
Different regions of the workpiece are subjected to different magnetic flux densities by strategically positioning permanent magnets with specific polarities. The first and second permanent magnets create magnetic flux through one path, while the third and fourth permanent magnets create magnetic flux through another path. This local differentiation optimizes the magnetic field distribution to avoid saturation in critical areas.
2Force
If multiple permanent magnets are arranged to create N-pole and S-pole pairs on the workpiece surface, then magnetic flux and attracting force are increased, but device complexity increases
Solution Approach 1:
The invention merges the functions of multiple permanent magnets into a coordinated system where each magnet serves a specific purpose in the overall magnetic flux path. The first and second permanent magnets are positioned to create flux through one path, while the third and fourth permanent magnets create flux through another path, with all magnets working together as an integrated unit to achieve strong attracting force without excessive complexity.
Solution Approach 2:
The magnetic pole arrangements are designed to create balanced magnetic flux paths. By positioning N-poles and S-poles in specific configurations across multiple permanent magnets, the invention achieves equipotential magnetic field distribution that optimizes flux flow through the workpiece while maintaining structural simplicity.
3Ease of operation
If a piston and cylinder configuration is used to displace permanent magnets, then attraction and release operation is simplified, but the mechanism size increases
Solution Approach 1:
The piston and cylinder configuration serves multiple functions: it displaces the permanent magnets for both attraction and release operations, and the same mechanism can be integrated into various magnet chuck designs. This multi-functional approach simplifies the overall operation while avoiding the need for separate mechanisms for different functions.
Solution Approach 2:
The invention employs a piston-cylinder mechanism that can be actuated by pressure fluid (pneumatic or hydraulic) to displace the permanent magnets. This allows for simple and reliable attraction and release operations without complex mechanical linkages, reducing the overall size of the magnet chuck while maintaining ease of operation.
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 design enhances the attractive force for thin workpieces, prevents rotation of permanent magnets, and allows for efficient attraction and release, improving the magnet chuck's ability to handle heavy or thin objects with reduced size and complexity.
Implementation Method 1
a magnet chuck that attracts and retains a workpiece by the magnetic force of a permanent magnet
Implementation Method 2
The plurality of permanent magnets are configured to be displaced in a same direction as a direction of displacement of the piston, in following relation to the piston receiving a pressing force from a pressure fluid and being displaced thereby
Data Source
AI summary
A magnet chuck includes, for example, four permanent magnets of a first permanent magnet through a fourth permanent magnet, serving as an attracting and retaining member for attracting and retaining a workpiece. In the first permanent magnet and the third permanent magnet, the magnetic polarity of a workpiece magnetic attracting surface facing the workpiece is of an N-polarity. On the other hand, in the second permanent magnet and the fourth permanent magnet, the magnetic polarity of a workpiece magnetic attracting surface is of an S-polarity. More specifically, in this case, combinations of the N-pole and the S-pole on the workpiece magnet attracting surface are formed in two pairs, and the N-pole and the S-pole, which are of different polarities, are adjacent to one another.