A device for electrical discharge machining of complex-shaped outer surfaces

Abstract

The invention discloses a device for conducting electrical discharge machining on the outer surface with complex shape. The device comprises a machining power supply and a workpiece clamp used for clamping workpieces and further comprises an outer edge electrode, a feeding system, an annular magnetic pole group and a control system. The outer edge electrode is fixed on the periphery of the outer surface of a workpiece to be machined, and a certain gap is reserved between the inner wall of the outer edge electrode and the outer edge of the workpiece. A motor is arranged at one end of the feeding system, and a magnetic pole clamp capable of reciprocating linearly in the preset journey range under driving of the motor is arranged on the lateral wall of the feeding system. The annular magnetic pole group is fixedly arranged on the magnetic pole clamp and encloses the outer wall of the outer edge electrode with a certain gap reserved in between. The control system is connected with the motor and the machining power supply through a circuit, two electrodes of the machining power supply are connected with the workpiece and the outer edge electrode, and conductive magnetic powder is arranged between the outer edge electrode and the outer surface of the workpiece to be machined. The device can be used for conducting coarsening, modification, strengthening and the like on the outer surface with the complex shape, can also be used for coating the outer surface with the complex shape, and is high in efficiency and low in cost.

Description

technical field [0001] The invention belongs to the field of electrical machining, and in particular relates to a device for electrical discharge machining of complex-shaped outer surfaces. Background technique [0002] With the development of economy and technology, various devices with complex-shaped outer surfaces have been widely used in production and life. Studies have shown that the secondary processing of the outer surface of such devices, such as on the outer surface of the device Manufacturing various microstructures, strengthening the outer surface of the device, or forming a coating on the outer surface of the device can effectively improve the function of this type of device, which has great practical significance. For example, if it can be applied to various The outer surface of the heat sink in the industrial field has a tiny structure, which can effectively increase the heat transfer surface area, thereby effectively improving the heat transfer efficiency. Ho...

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Problems solved by technology

[0004] However, if the traditional shaped electrode discharge machining method is used to process the outer surface with complex shapes, it is required to manufacture a rigid shaped electrode first, because the shaped electrode is quite difficult to manufacture and install, and the EDM process still exists. Wear of the tool electrode, so machining complex-shaped external surfaces by EDM with formed electrodes is time-consuming and expensive

[0005] If wire electric discharge cutting is used to process the outer surface with complex shapes, although it can avoid the problem of costing a lot of cost in the production of forming electrodes, it can also ignore the impact of tool electrode loss on the processing process, but the processing speed of this method is extremely low , it is difficult to meet the needs of actual production

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