Outer Blade Cutting Wheel Electropolishing Dressing
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Solution Overview
Problem
Existing methods for dressing outer blade cutting wheels used for cutting rare earth permanent magnets are inefficient, leading to suboptimal cutting performance due to inadequate exposure of abrasive grains and bonding material removal, which affects cutting accuracy and surface quality.
Innovation Solution
The method involves clamping the cutting wheel between circular jigs and immersing it in an electropolishing liquid, using electrodes to electrolytically dissolve the bonding material and chips in chip pockets, effectively exposing abrasive grains and enhancing the blade section's trueness, while also utilizing the electroplating or electroless plating bath as the electropolishing liquid for consistent and efficient dressing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional dressing methods (wire EDM or grinding) are used to expose abrasive grains, then the cutting wheel can be restored, but the dressing efficiency is low and cutting performance is suboptimal due to inadequate exposure of abrasive grains and bonding material removal
Solution Approach 1:
The patent replaces mechanical dressing methods (wire EDM or grinding) with an electrochemical dissolution method. The cutting wheel is immersed in an electropolishing liquid and electric current is applied to dissolve the bonding material and chips electrolytically, exposing abrasive grains without mechanical contact. This substitution achieves superior dressing efficiency and cutting performance simultaneously.
Solution Approach 2:
The patent changes the physical-chemical state of the bonding material through electrochemical dissolution. By controlling electrical parameters (current density, voltage) and chemical parameters (electropolishing liquid composition, temperature), the bonding material is selectively dissolved to expose abrasive grains while maintaining the integrity of the cutting wheel structure, achieving both high precision and high efficiency.
2Manufacturing precision
If electropolishing is used to dissolve bonding material and expose abrasive grains, then cutting performance and machining accuracy are improved, but additional process steps and equipment are required
Solution Approach 1:
The patent makes the electropolishing liquid serve dual functions: it acts as both the electropolishing medium for dissolving bonding material and as the working fluid for the electroplating process. The same liquid composition and bath are used for both dressing and bonding operations, reducing the number of separate processes and equipment needed while maintaining high machining accuracy.
Solution Approach 2:
The patent combines the electropolishing dressing process with the electroplating bonding process by using the same electropolishing liquid for both operations. This merging of processes eliminates the need for separate dressing and bonding equipment, reducing overall system complexity while achieving superior cutting performance through effective abrasive grain exposure.
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
This approach results in a high-performance outer blade cutting wheel with improved machining accuracy and surface quality, as demonstrated by the exposure of abrasive grains and reduced cutting marks, leading to enhanced dimensional precision and efficiency in cutting rare earth permanent magnets.
Implementation Method 1
immersing it in an electropolishing liquid, using electrodes to electrolytically dissolve the bonding material and chips in chip pockets
Implementation Method 2
electroplating or electroless plating a metal or alloy to deposit a metal or alloy bond for bonding abrasive grains together or to the base
Data Source
Figure 1
Figure 2A~2C
Figure 3
AI summary
An outer blade cutting wheel (1) comprising a base and a blade section (11) of metal or alloy-bonded abrasive grains is dressed by clamping the cutting wheel between a pair of circular jigs (2) such that the blade section (11) projects beyond the jigs, immersing the cutting wheel in an electropolishing liquid, positioning counter electrodes (4, 5, 6) relative to the blade section, and effecting electropolishing for thereby removing part of the metal or alloy bond and chips received in chip pockets until abrasive grains are exposed on the blade section surface.