Combined laser-electric spark-electrolysis machining method and device for micro holes with countersunk heads

A technology of combined processing and combined devices, which is applied in the field of laser-electric spark-electrolysis combined processing, the processing device dedicated to this method, can solve the problems of high-efficiency and precision processing methods for micro-holes with countersunk heads, which are not given, and achieve high speed Fast, small heat-affected zone, high machining accuracy

Inactive Publication Date: 2014-09-03
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology does not provide an efficient and precise machining method for machining tiny holes with countersunk heads

Method used

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  • Combined laser-electric spark-electrolysis machining method and device for micro holes with countersunk heads
  • Combined laser-electric spark-electrolysis machining method and device for micro holes with countersunk heads
  • Combined laser-electric spark-electrolysis machining method and device for micro holes with countersunk heads

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0025]Implementation case 1: This case is a laser-EDM-electrolytic machining method for micro-holes with countersunk heads. First, the laser beam is used to pre-process the through-holes of the countersunk micro-holes on the workpiece, and then the tubular copper electrodes are used to countersunk the micro-holes. Carry out EDM to basically achieve the required shape accuracy of the countersunk head, and finally use the high-speed jet electrolyte beam coaxial with the EDM electrode to electrolytically process the entire micro-hole with the countersunk head to remove the remaining parts after the first two processes The recasting layer realizes no residual stress and high-efficiency machining of countersunk micro-holes.

[0026] The electric discharge machining fluid is deionized water or distilled water, and the electrolyte is low-concentration strong acid and strong alkali salt.

Embodiment example 2

[0027] Implementation case 2: This implementation case is a micro-hole laser-EDM-electrolytic machining device with a conical countersunk head and an axisymmetric countersunk head, including a laser generating device, a combined device for EDM and electrolytic processing, a processing method conversion device, and a working fluid Circulation system, power supply and control system. Among them, the laser generating device, EDM and ECM combination device are installed in parallel on the processing mode conversion device, and move through the movement command issued by the control system; the working fluid circulation system provides processing fluid for EDM and ECM respectively.

[0028] The processing mode conversion device includes: 1. motor, 2. support for fixing, 6. sliding guide rail, 7. support for fixing, 10. support for fixing, 11. precision ball screw. Among them, the motor 1 provides the driving force for the movement of the laser generating device, the electric discha...

Embodiment 3

[0033] Embodiment 3: The structure of this embodiment is basically the same as that of Embodiment 2, but the processing object is a micro hole with a non-axisymmetric countersunk such as a dustpan-shaped countersunk. In this embodiment, the electrode for electrical discharge machining does not rotate.

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Abstract

The invention relates to a combined laser-electric spark-electrolysis machining method and device for micro holes with countersunk heads. The method comprises the steps: carrying out through hole pre-machining on the micro holes with the countersunk heads on a workpiece through a laser beam, carrying out electric spark machining on the countersunk heads of the micro holes through a tubular copper electrode to achieve needed precision of the shape of the countersunk heads basically, and carrying out electrolytic machining electrolysis machining on the whole micro holes with the countersunk heads through a high-speed jet electrolyte beam coaxial with the electric spark machining electrode to remove recast layers remaining after the former two machining steps. The device comprises a laser generation device, a combined electric spark machining and electrolysis machining device, a machining mode conversion device, a working solution circulation system, a power supply and a control system. According to the method, laser machining and electric spark machining are the main machining modes and supplemented by electrolysis machining, and the high speed, high precision and high quality can be achieved at the same time. By means of the method and device, rapid machining of the micro holes with the various special-shaped countersunk heads can be achieved, and various shortcomings caused by the adoption of a single specific machining mode in the prior art can be overcome.

Description

technical field [0001] The invention relates to a method and device for processing the micro-hole structure of a countersunk head, in particular to a combined laser-electric spark-electrolytic processing method and a special processing device for the method. Background technique [0002] EDM, electrolytic machining and laser machining are processing techniques developed in the 1940s, 1950s and 1960s respectively. Due to their different advantages, they have developed rapidly. They are used in aerospace, weaponry, automobiles, Widely used in electronics, shipbuilding and other manufacturing industries. The three have their own distinct characteristics for the processing of small holes that widely exist in the above fields. There are two methods of EDM machining micro-holes, namely EDM perforation and high-speed EDM small hole machining. Compared with other methods, they have certain advantages in micro-hole machining: any conductive material can be processed without being af...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23H5/00B23H9/14
Inventor 蒋毅孔令蕾平雪良田媛
Owner JIANGNAN UNIV
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