Height localization focused ultrasonic-assisted electromachining device and method

Abstract

The invention discloses a height localization focused ultrasonic-assisted electromachining device and method. The height localization focused ultrasonic-assisted electromachining device comprises a mounting seat, an electromachining mechanism and an ultrasonic-assisted mechanism, wherein the ultrasonic-assisted mechanism comprises a mounting frame arranged on the mounting seat, a focused ultrasonic vibrator fixed at the lower end of the mounting frame and a reciprocating driving mechanism; the electromachining mechanism comprises a machining liquid tank, a clamp arranged in the machining liquid tank and an electrode; the electrode and the focused ultrasonic vibrator are coaxially arranged, and the electrode penetrates through the focused ultrasonic vibrator and vertically extends downwards; and a clamping rod is arranged between the mounting seat and the electrode. The device is simple in structure, the strong sound pressure effect on a machining area can be achieved under low power, the focused ultrasonic focus in the device can be changed at any time in the axial direction, and the sound pressure of all positions of a dielectric medium in the machining area can be changed more disorderly, so that updating of the dielectric medium is further accelerated, and the product discharging efficiency and the machining efficiency are improved.

Description

technical field [0001] The invention relates to the technical field of special processing, in particular to a highly localized focusing ultrasonic assisted electric processing device and method. Background technique [0002] In metal processing, it usually includes traditional machining, electrolytic machining and electric discharge machining and other processing methods. In the above method, the processing quality and processing efficiency can be improved through the ultrasonic auxiliary device, mainly because the ultrasonic vibration can generate acoustic flow in the processing medium (liquid), and the generated cavitation bubbles can impact the processed workpiece, improving the processing efficiency. The product discharge effect enhances the value transfer process. In EDM, ultrasonic assist can improve problems such as poor chip removal and easy arcing. In electrolytic machining, it can also promote the discharge of products and bubbles, and the impact of cavitation bu...

AI Technical Summary

Problems solved by technology

[0003] The existing ultrasonic-assisted processing methods are mainly divided into two categories, one of which is to integrate the electrode and the ultrasonic vibrator, and the electrode (anode or cathode) is used as the ultrasonic emission source during the processing to directly affect the processing gap; Class can be divided into tool vibration (such as figure 1 shown) and workpiece vibration (such as figure 2 (shown) two methods, in which tool vibration often requires the design of a metal ultrasonic transducer system (vibrator) with a complex structure, and due to the limitation of the resonance frequency, the length of the vibrator cannot be set arbitrarily. high requirements

Moreover, in the micromachining of small tools, this method of combining the ultrasonic auxiliary device with the tool is very easy to cause radial vibration of the tool, resulting in a short circuit and reducing the machining accuracy

[0004] The other is to place the ultrasonic vibrator in the dielectric medium. The ultrasonic vibrator is used as the emission source of the ultrasonic wave, and the dielectric medium also acts as the medium for the ultrasonic propagation. Under the action of the ultrasonic wave, the dielectric medium produces an acoustic flow phenomenon to speed up the flow of the dielectric medium, and indirectly affects the processing gap ( like image 3 shown); in this category, Matthias Hackert- In the micro-EDM process, the ultrasonic vibrator is placed in the dielectric near the processing area and at a certain angle to the tool electrode, and high-intensity ultrasound is applied to the conductive medium to assist EDM drilling, which increases the processing speed by 40%; however, The above-mentioned processing method requires a relatively large driving power. Since the ultrasonic auxiliary device and the electrode have a certain angle, the efficiency of the ultrasonic wave propagating to the processing gap is reduced, resulting in the auxiliary effect of the ultrasonic wave not being well reflected.

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