Jerk Electrode Control for Conical Micro-Hole Machining
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Solution Overview
Problem
Existing electrolytic machining technologies face challenges in forming conical micro-holes in alloy steel nozzles due to gas bubble formation, reduced machining efficiency, and inability to process inverted conical or complex shapes.
Innovation Solution
The jerk electrolytic processing apparatus uses a pulse current and a waveform generator to control the electrode's movement with a jerk motion, minimizing gas bubble formation by allowing the electrolytic solution to carry away bubbles quickly and enabling the processing of complex hole shapes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If electrical discharge machining is used to form conical micro-holes, then machining efficiency is improved, but gas bubbles are easily formed in the electrolytic solution reducing processing quality
Solution Approach 1:
The patent applies periodic pulsed current instead of continuous direct current for electrolytic machining. The controller switches the power supply on and off periodically, creating pulse currents that allow electrolytic solution to flush away gas bubbles during the off-periods, preventing bubble accumulation and maintaining high processing quality while preserving machining efficiency
Solution Approach 2:
The patent extracts and removes gas bubbles from the electrolytic solution between the electrode and workpiece during the machining process. By periodically stopping current flow, the system allows bubbles to detach and be carried away by the electrolytic solution flow, eliminating the harmful effect of bubbles on processing quality
2Reliability
If continuous direct current is applied during electrolytic machining, then electrode wear is reduced, but gas bubble formation increases decreasing processing quality
Solution Approach 1:
The patent transforms continuous direct current into periodic pulsed current by controlling the power supply to switch on and off at regular intervals. During the on-period, electrolytic machining occurs; during the off-period, gas bubbles have time to detach and be flushed away by the electrolytic solution, preventing quality degradation while maintaining electrode stability
3Ease of manufacture
If conventional electrolytic machining is used, then simple hole shapes can be processed, but inverted conical or complex shapes cannot be achieved
Solution Approach 1:
The patent introduces dynamic control of the electrode movement system, allowing the electrode to move along the hole axis with variable speed and position control. The controller can adjust the electrode's axial position dynamically during machining, enabling the formation of inverted conical holes and complex internal shapes by controlling material removal rates at different positions
Solution Approach 2:
The patent changes the machining parameters including pulse width, pulse frequency, and electrode position to control the electrolytic machining process. By varying these parameters during the process, the system can create different hole shapes (conical, inverted conical, complex shapes) while maintaining ease of operation through automated controller management
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
This approach enhances machining efficiency and quality by reducing gas bubble formation, allowing for the production of holes with larger taper rates, and enabling the creation of micro-structures with various characteristics and shapes.
Implementation Method 1
The controller applies the pulse current to the electrode and controls the electrode to move in the hole with a jerk to process the inner wall surface of the hole for deforming the hole as a characteristic shape
Implementation Method 2
The electrolytic solution can carry away the gas bubbles generated during the machining process more quickly
Data Source
AI summary
A jerk electrolytic processing apparatus is configured for processing a hole of a workpiece. The jerk electrolytic processing apparatus includes an electrolytic solution-providing device, a waveform generator, an electrode and a controller. The electrolytic solution-providing device is configured to provide an electrolytic solution to flow through the hole. The waveform generator is configured to generate a wave signal, and the wave signal is one of square wave, triangular wave and sine wave. The electrode is configured correspondingly to the hole of the workpiece. The electrode is configured to move in the hole along an axis of the hole. The controller is configured to generate a pulse current according to the wave signal. The controller applies the pulse current to the electrode and control the electrode to move in the hole with a jerk to process the inner wall surface of the hole for deforming the hole as a characteristic shape.