Milling and electrosparking combined machining method

Abstract

The invention discloses a milling and electrosparking combined machining method, and relates to a mechanical cutting method. An indexable milling tool is chosen, the blade of the indexable milling tool is a non-conducting blade, or arranges an insulating layer on an electrically conductive blade, the insulating layer enables the blade to be insulated with a toolbar, and then one of the blades is replaced with an electrically conductive metal sheet. A bearing matched with the toolbar of the indexable milling tool is chosen to be sleeved on the toolbar, an insulating sleeve is sleeved at the upper end of the toolbar, and then the upper end of the toolbar is clamped on the main shaft of a milling machine, a workpiece is clamped on the workbench of the milling machine, an insulating plate is arranged under the bottom face of the workpiece, two wires are respectively connected with two electrodes of a power supply, one of the wires is pressed on the bottom face of the workpiece, and the other wire is wound on the wall of the bearing outer ring. The rotatable milling tool and the workpiece are enabled to form a return circuit, and are insulated with the milling machine. And after powered on, the milling machine can be run to carry out milling. The electric sparks are used for auxiliary milling, the loss of the milling tool can be greatly reduced, milling efficiency is obviously improved, and the loss of the electrodes does not influence the milling precision of parts.

Description

technical field [0001] The invention relates to a mechanical cutting method, in particular to a milling and electric spark composite processing method. Background technique [0002] Milling is one of the most commonly used mechanical cutting methods for machining cavities, contours and planes, and electric discharge is the most widely used special processing method. In order to solve the wear problem of milling cutters, especially in dry milling, hard milling and milling difficult-to-machine materials, milling cutters will produce huge wear. [0003] In the 1980s, a new type of EDM technology called EDM was produced. This kind of electric discharge milling uses the tool electrode of electric discharge instead of the milling cutter, the electrode rotates, and then the feed system of the milling machine is used to process the part. Keep a certain gap between the tool electrode and the part, and spray the working fluid into the gap. The removal of the part material is complet...

AI Technical Summary

Problems solved by technology

However, EDM also has its disadvantages. On the one hand, compared with mechanical cutting, its processing speed is very slow and its efficiency is very low. There is a layer of heat-affected layer. This heat-affected layer is easy to peel off under the action of fatigue load. For molds, aviation parts, etc., this problem is very taboo. In addition, the loss of the electric spark tool motor has a great impact on the machining accuracy. , and the loss of the tool motor is unavoidable

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