Wire-EDM Cutting Path Feedback for Complex Profile Machining

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Solution Overview

Problem

Wire Electro-Discharge Machining (Wire-EDM) is slower and requires multiple passes to achieve desired surface integrity due to deviations in cutting paths caused by complex profile shapes, affecting displacement speed and overall machining time.

Innovation Solution

A method and system that determine modified cutting paths for subsequent components based on cutting parameters obtained from previous machining, optimizing cutting paths by adjusting displacement speed and energy levels to improve precision and reduce global cycle time.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If Wire-EDM is used to machine complex profile shapes, then manufacturing precision is improved, but productivity deteriorates due to slower machining speed and multiple required passes

Engineering Contradiction:
Improvesurface integrityVSAvoidmachining speed
Core Design Contradiction:
Manufacturing precisionVSProductivity

Solution Approach 1:

The system measures actual cutting parameters (displacement speed, energy levels) from previously machined components and uses this feedback to automatically modify cutting paths for subsequent components. This closed-loop approach optimizes machining parameters based on real performance data, improving both precision and productivity by reducing the number of passes required while maintaining surface integrity

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The invention dynamically adjusts cutting parameters including displacement speed and energy levels based on measured performance from previous components. By modifying these parameters and optimizing cutting paths, the system achieves faster machining speeds while maintaining the precision and surface integrity required for complex profile shapes

Inventive Principle:
Principle #35Parameter changes

2Manufacturing precision

If multiple cutting passes are performed to achieve desired surface integrity, then manufacturing precision is improved, but loss of time increases due to extended global cycle time

Engineering Contradiction:
Improvesurface integrityVSAvoidglobal cycle time
Core Design Contradiction:
Manufacturing precisionVSLoss of time

Solution Approach 1:

The system uses feedback from measured cutting parameters of previous components to optimize cutting paths and parameters for subsequent components. This allows the system to achieve desired surface integrity in fewer passes by predicting and compensating for deviations before they occur, thereby reducing global cycle time while maintaining precision

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The system performs preliminary measurement and analysis of cutting parameters from previous components before machining subsequent components. This preliminary action enables optimization of cutting paths and parameters in advance, allowing fewer passes to achieve the desired surface integrity and reducing overall machining time

Inventive Principle:
Principle #10Preliminary action

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 method optimizes machining time and precision by adjusting cutting paths and energy levels, ensuring consistent material removal and improved surface integrity.

Implementation Method 1

Wire Electro-Discharge Machining (Wire-EDM) is a process that uses a wire electrode to machine metal

Methodology Applied
Scientific EffectElectro-discharge machining: Electrical Discharge Machining

Data Source

PatentUS11338381B2Method and system for wire electro-discharge machining a component
Publication Date: 2022.05.24 PRATT & WHITNEY CANADA CORP
  • US11338381B2 patent drawing
  • US11338381B2 patent drawing
  • US11338381B2 patent drawing

AI summary

Methods and systems for wire-electro discharge machining of components are described. The method comprises machining a first component by moving a wire-EDM electrode along a first set of cutting paths associated with a plurality of cutting passes, the cutting paths determined based on a desired profile shape of the component, obtaining a cutting parameter of the first component post-machining, determining a first modified cutting path for a second component based on the cutting parameter, and machining the second component by moving the wire-EDM electrode along a second set of cutting paths associated with the plurality of cutting passes, the second set of cutting paths comprising the first modified cutting path.