Dual-Nozzle Cutting Liquid Layout for Swarf Adhesion Control
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Solution Overview
Problem
Existing cutting apparatuses face challenges in efficiently preventing the adhesion of cutting swarf to devices during the cutting process, despite the use of cleaning water, leading to reduced quality of devices.
Innovation Solution
A cutting apparatus equipped with a cutting liquid supply nozzle and a chemical liquid supply nozzle, where the chemical liquid supply nozzle is longer than the workpiece and supplies chemicals like ammonia, aqueous hydrogen peroxide, or citric acid solutions to prevent adhesion, while the cutting liquid supply nozzle uses pure water or neutral surfactants to maintain cutting blade lubrication and prevent corrosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If cleaning water is supplied to wash away cutting swarf, then adhesion prevention is improved, but washing efficiency is insufficient
Solution Approach 1:
The patent changes the parameter of liquid type from ordinary cleaning water to chemically active liquids (ammonia, aqueous hydrogen peroxide, citric acid, sulfuric acid, phosphoric acid, buffered hydrofluoric acid). This chemical parameter change enables effective dissolution and removal of cutting swarf that water cannot eliminate, thereby resolving the contradiction between adhesion prevention and washing efficiency
Solution Approach 2:
The patent replaces the mechanical washing action of water spray with chemical dissolution action. Instead of relying on mechanical force to remove swarf, the system uses chemically active liquids that actively dissolve and neutralize cutting swarf, achieving superior cleaning efficiency and adhesion prevention
2Productivity
If chemical liquids are supplied to prevent adhesion, then washing efficiency is improved, but cutting blade corrosion occurs
Solution Approach 1:
The patent segments the liquid supply system into two distinct nozzles: a cutting liquid supply nozzle for the cutting blade area and a chemical liquid supply nozzle for the workpiece surface. This spatial segmentation allows chemical liquids to contact only the workpiece and swarf, preventing corrosion of the cutting blade while maintaining effective swarf removal
Solution Approach 2:
The patent applies different liquid properties to different locations: chemically active liquids are applied locally to the workpiece surface where swarf adhesion occurs, while the cutting blade area receives protection from these corrosive chemicals. This localized application resolves the contradiction between effective cleaning and blade protection
3Reliability
If cutting liquid is supplied to maintain lubrication, then cutting performance is improved, but swarf removal efficiency deteriorates
Solution Approach 1:
The patent divides the liquid supply function into two separate systems: cutting liquid supply for lubrication and chemical liquid supply for swarf removal. This functional segmentation allows each liquid to perform its specialized role without interference, maintaining both cutting performance and swarf removal efficiency
Solution Approach 2:
The patent introduces chemical liquids as an intermediary substance that specifically targets and neutralizes cutting swarf without affecting the cutting blade's lubrication layer. The chemical liquid acts as a mediator between the cutting process and swarf removal, enabling effective cleaning while preserving cutting performance
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
Effectively washes away cutting swarf from the workpiece surface, maintains lubrication and cooling of the cutting blade, and prevents corrosion, ensuring efficient division of devices into individual chips.
Implementation Method 1
a chemical liquid supply nozzle which supplies a chemical liquid for preventing adhesion of cutting swarf to a front surface of the workpiece
Implementation Method 2
the cutting liquid supply nozzle supplies pure water or an aqueous solution of a neutral surface active agent
Implementation Method 3
lubricating properties and cooling properties for a cutting edge of the cutting blade can be maintained
Data Source
AI summary
A cutting apparatus includes a cutting liquid supply nozzle that is disposed adjacent to a cutting unit and supplies a cutting liquid to a contact point between a cutting blade and a workpiece and a chemical liquid supply nozzle that has a length in a Y-axis direction which is greater than the width of the workpiece and supplies a chemical liquid for preventing adhesion of cutting swarf to a front surface of the workpiece.