A method and device for preventing punch-through short circuit of electrolytic machining hole

Abstract

The invention discloses a method and a device for preventing electrolytic machining holes from penetrating and short circuiting, and belongs to the technical field of electrolytic machining. A method of preventing electrolytic machining hole punch-through short circuit according to the present invention is specifically as follows: during the process of electrolytic machining through-hole, detect the change of electrolytic machining current in real time; The position is applied with reverse flow and hedged electrolyte, so that the electrolyte still flows out from the electrolytic machining gap when the hole is pierced, so as to avoid the dead zone of electrolyte flow at the pierced position and cause the short circuit between the electrolytic cathode and the workpiece. The invention also discloses a device for preventing the electrolytic machining hole from penetrating and short circuiting. In the present invention, when the electrolytic cathode passes through the workpiece, the counterflow electrolyte is applied to the penetration position, which avoids the contact short circuit between the electrolytic cathode and the workpiece, prevents the short circuit burn of the cathode, and ensures the stability of the electrolytic machining hole and the machining accuracy of the hole. It has the characteristics of strong versatility and wide application range.

Description

technical field [0001] The present invention relates to a method and a device for electrolytically machining a through hole, and more specifically, to a method and a device for preventing a through-short circuit of an electrolytically machined hole. Background technique [0002] Electrolytic machining has the characteristics of no loss of tool cathode, no cutting force, machining is not affected by material cutting performance, machining accuracy, and high efficiency. It is especially suitable for machining small holes, deep holes, and special-shaped holes in difficult-to-machine materials. The electrolytic machining process includes three stages: the first stage is to process the initial tool cathode and position it on the upper surface of the workpiece with a certain initial gap. Erosion begins; the second stage is continuous feeding of the tool cathode, and the processing enters a stable state, and the electrolyte flows out from the side gap between the tool cathode and t...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the disadvantages of the existing electrolytic machining through-holes, such as the short circuit between the cathode and the workpiece, resulting in cathode burns and the inability to process normally, and to provide a method and device for preventing the electrolytic machining hole from being penetrated and short-circuited. The technical solution is to apply reverse flow and hedging electrolyte to the penetration position when the electrolytic cathode penetrates the workpiece, so that the electrolyte still flows out from the electrolytic machining gap when the hole is penetrated, thereby avoiding the electrolyte flow dead zone at the penetration position and causing the electrolysis cathode Contact short circuit with the workpiece, avoid short-circuit burns of electrolytic cathode, save economic cost, and ensure the stability of the electrolytic machining hole penetration and the machining accuracy of the hole. It has the characteristics of strong versatility and wide application range.

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