Wire EDM Control for Interrupted Machining Time Calculation
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Solution Overview
Problem
Existing wire electric discharge machines lack the capability to accurately measure and calculate the total time required for machining that is interrupted and subsequently resumed, leading to inaccuracies in time and cost calculations.
Innovation Solution
A control device and method for a wire electric discharge machine that includes a machining control unit, time measurement unit, and machining time calculation unit to measure and calculate the total time period for machining by tracking the time from starting to interruption and resuming, allowing for accurate total time and cost determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If machining is interrupted to perform second machining on a different workpiece, then the machine can handle multiple workpieces and improve productivity, but the total time period for the first machining cannot be accurately obtained
Solution Approach 1:
The patent segments the total time measurement into distinct components: first time period (from start to interruption) and second time period (from resumption to completion). By dividing the measurement into segments that can be independently tracked and then summed, the system maintains accurate total time measurement even when machining is interrupted for other workpieces.
Solution Approach 2:
The control device implements feedback mechanisms by having the time measurement unit continuously monitor and record time periods, and the machining time calculation unit sum these recorded periods to calculate the total time. This feedback loop ensures that even when machining is interrupted and resumed, the system accurately tracks and reports the complete machining time.
2Measurement precision
If the control device tracks time from start to interruption and from resumption to end, then accurate total time calculation is achieved, but the device complexity increases
Solution Approach 1:
The patent merges the time measurement and calculation functions into the existing control device. The time measurement unit and machining time calculation unit are integrated components that work together within the control device, avoiding the need for separate external timing systems and reducing overall system complexity while maintaining measurement accuracy.
Solution Approach 2:
The control device is designed with multi-functionality, serving both as the machining controller and as the time measurement and calculation system. By making the control device universal—capable of both controlling the machining process and measuring/calculating time—the patent avoids adding separate dedicated timing devices, thereby reducing device complexity.
Data Source
AI summary
A control unit for executing a control method for controlling a wire electrical discharge machine includes a machining control unit for carrying out first machining on a first machining object, suspending the first machining if an interruption is necessary, carrying out second machining on a second machining object, and resuming the first machining after the second machining ends; a timing unit for timing a first period from the start to the suspension of the first machining, and a second period from the resumption to the end of the first machining; and a machining time calculation unit for calculating a first total time required for the first machining.