Cutting Blade Corrosion Protection via Sacrificial Ionization Layer
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Solution Overview
Problem
The cutting blade in cutting apparatuses corrodes and wears quickly when using cutting liquids like pure water mixed with carbon dioxide, leading to reduced blade strength and processing defects.
Innovation Solution
A cutting apparatus with a cutting blade featuring an annular base and a cutting edge with abrasive grains and a binder, where the blade mount or fixing nut is coated with a corrosion layer made of a material with a higher ionization tendency than the binder, allowing the corrosion layer to sacrificially corrode and protect the cutting edge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pure water mixed with carbon dioxide (carbonated water) is used as the cutting liquid, then static electricity generation is suppressed and device electrostatic breakdown is prevented, but the cutting blade corrodes and wears quickly leading to reduced blade strength
Solution Approach 1:
The patent introduces a corrosion layer as an intermediary substance between the cutting blade and the corrosive cutting liquid. This corrosion layer, formed by materials with higher ionization tendency than the binder, acts as a mediator that preferentially reacts with the cutting liquid, protecting the cutting blade from direct corrosion while allowing the cutting liquid to continue its cooling and flushing functions
Solution Approach 2:
The patent converts the harmful corrosion effect of the cutting liquid into a beneficial protective mechanism. By utilizing the ionization tendency difference between materials, the cutting liquid's corrosiveness is redirected to attack the corrosion layer instead of the cutting blade, transforming a harmful effect into a protective sacrificial mechanism
2Temperature
If pure water is used as the cutting liquid, then cooling and flushing functions are provided, but static electricity occurs in the contact region between the cutting blade and workpiece causing device electrostatic breakdown
Solution Approach 1:
The patent changes the chemical composition parameter of the cutting liquid by mixing pure water with carbon dioxide to create carbonated water. This parameter change reduces the resistivity of the cutting liquid, enabling it to conduct away static electricity while maintaining its cooling and flushing functions
3Use of energy by stationary object
If the cutting blade is continuously supplied with cutting liquid during cutting, then cooling and waste removal are maintained, but the cutting blade corrodes and wears due to the cutting liquid
Solution Approach 1:
The corrosion layer serves as a protective intermediary that allows continuous supply of cutting liquid to maintain cooling and waste removal functions while preventing direct contact between the cutting liquid and the cutting blade, thereby extending the cutting blade's service life
Data Source
AI summary
A cutting apparatus includes a chuck table configured to hold the workpiece, and a cutting unit fitted with a cutting blade including an annular base and a cutting edge that includes abrasive grains and a binder configured to fix the abrasive grains, and is formed along an outer circumferential edge of the base. The cutting unit includes a spindle, a blade mount fitted to a distal end portion of the spindle, and a fixing nut configured to fix the cutting blade to the blade mount, and the blade mount or the fixing nut is provided with a corrosion layer formed of a material having a higher ionization tendency than a material constituting the binder.