Inverted taper hole micro electric discharge machining device of fuel injector based on electrode side wall insulation

Abstract

The invention discloses an oil nozzle inverted conical hole micro electric discharge machining device based on electrode side wall insulation. The oil nozzle inverted conical hole micro electric discharge machining device comprises a rapid feeding device, a micro feeding device, a worktable positioning device, a workpiece clamping device, a controllable RC pulse power supply and a side wall insulation electrode which are arranged on a base plate and a bracket, wherein the open-circuit voltage of the controllable RC pulse power supply can be dynamically controlled. By adoption of the oil nozzle inverted conical hole micro electric discharge machining device, the machining precision and efficiency of an oil nozzle inverted conical hole are improved, the complexity of an inverted conical hole machining device and the high-precision requirement for the device are lowered, and the error caused by low electrode wire rigidity is eliminated; by adoption of the side water insulation electrode, the phenomenon that during non-insulation electrode machining, as the machining time become longer, excessive electric corrosion and electric corrosion products at a machining inlet cause waist expansion can be eliminated; meanwhile, by means of the condition that the head of the electrode discharges and the side face of the electrode does not discharge, the electric corrosion products are made to discharge at the bottom to eliminate the condition of insufficient outlet machining; and an insulation layer is gradually subjected to electric corrosion when the electrode discharges at the bottom, and accordingly, the inverted conical hole meeting the requirement is machined.

Description

technical field [0001] The invention belongs to the field of mechanical engineering, and in particular relates to a fine electric discharge machining device for an inverted taper hole of a fuel injector based on electrode side wall insulation. Background technique [0002] As an important branch of advanced manufacturing technology, micro-EDM technology has become an indispensable part of the manufacturing technology field. Especially after entering the 21st century, with the development of high and new technologies such as information technology and material science and technology, micro-EDM technology is also developing towards a deeper and higher level. Although the traditional micro-EDM technology has shown advantages such as high processing efficiency in some special processing fields through its own continuous update and development and integration with other related technologies, but this technology still has certain shortcomings. On the contrary, micro-EDM technolog...

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Problems solved by technology

Moreover, the processing outlet becomes slender due to the loss of the end of the non-insulated electrode itself, and the processing is less, and the standard "reverse taper hole" cannot be formed

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