EDM Electrode Guide Mist Layout for Deep Shaving Removal
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Solution Overview
Problem
Existing aerial electric discharge machining apparatuses face difficulties in effectively removing shavings due to the small diameter of the tool electrode and the inefficiency of gas in reaching deep workpiece portions, leading to incomplete machining.
Innovation Solution
The apparatus incorporates a tubular extended guide with pressurized working fluid supplying openings at equal angular intervals, mixing compressed gas with pressurized working fluid to generate mist uniformly, which is then ejected to reliably remove shavings and cool the tool electrode, while dies support the tool electrode to enhance mist generation and cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If compressed air is ejected from a small hole tool electrode to remove shavings, then the tool electrode can be cooled, but the amount of compressed air is very small and shavings cannot be sufficiently removed
Solution Approach 1:
The compressed air supply is segmented into multiple paths: air is supplied both through the tool electrode's small hole and through separate air supply nozzles positioned around the tool electrode. This segmentation allows the total air flow to be divided into multiple streams, increasing the overall quantity of air available for cooling and shaving removal while maintaining the precision of the small hole electrode.
Solution Approach 2:
The air supply nozzles are arranged concentrically around the tool electrode, creating a nested structure where the tool electrode is positioned within the annular space formed by the nozzles. This nested arrangement allows compressed air to flow both through the inner tool electrode and through the outer annular region, maximizing the utilization of compressed air for both cooling and shaving removal functions.
2Device complexity
If two liquid mist ejecting nozzles are arranged on both sides of the small hole tool electrode at positions away from the machining portion, then the structure is simple, but the mist does not reach the machining portion and shavings cannot be sufficiently removed in deep portions
Solution Approach 1:
The air supply nozzles are positioned in the radial direction around the tool electrode rather than only on the lateral sides, creating a three-dimensional mist distribution pattern. This spatial arrangement ensures that mist is generated and delivered from multiple directions, allowing the mist to reach the machining portion effectively even in deep portions of the workpiece, thereby improving shaving removal completeness.
3Object-affected harmful factors
If mist is generated in the air to remove shavings, then liquid cooling can be achieved, but gas alone is insufficient for effective shaving removal compared to liquid
Solution Approach 1:
The invention combines pneumatic (compressed air) and hydraulic (liquid mist) systems to achieve effective shaving removal. Compressed air is supplied both through the tool electrode and through surrounding nozzles, while liquid mist is generated by the interaction between the compressed air and the working fluid. This combined pneumatic-hydraulic approach leverages the cooling capability of liquid and the high-velocity transport capability of gas, effectively removing shavings from the machining zone.
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 ensures uniform mist generation and ejection along the tool electrode, effectively removing shavings and suppressing tool electrode temperature increases, thereby improving machining precision and reducing tool electrode consumption.
Implementation Method 1
the pressurized working fluid supplied from the working fluid filling space into the mist generating space through the pressurized working fluid supplying openings is mixed with the compressed gas in the mist generating space so that the pressurized working fluid is atomized to be ejected as mist
Implementation Method 2
electric discharge machining to a workpiece by moving a tool electrode with an electric discharge generated between the workpiece and the tool electrode
Implementation Method 3
pressurized working fluid supplied from the working fluid filling space into the mist generating space through the pressurized working fluid supplying openings is mixed with the compressed gas in the mist generating space so that the pressurized working fluid is atomized to be ejected as mist
Data Source
AI summary
An electric discharge machining apparatus includes a tool electrode that performs electric discharge machining to a workpiece, a tubular extended guide in which the tool electrode is inserted, a long nozzle in which the tool electrode is inserted with a tip protruded, and provided along an outer wall surface of the extended guide so as to provide mist generating space between the extended guide and the long nozzle, a compressed gas supplying device supplying compressed gas into the mist generating space, and a pressurized working fluid supplying device supplying pressurized working fluid into working fluid filling space between the tool electrode and the extended guide.