Elliptical ultrasonic vibration auxiliary cutting device with adjustable track

Abstract

The invention relates to an elliptical ultrasonic vibration auxiliary cutting device with an adjustable track, which consists of a transducer, an amplitude transformer and a cutter, wherein the transducer adopts a basic structure of a longitudinal vibration sandwiched piezoelectric chip, has revolution asymmetric characteristic structures of an overlapping structure of semicircular ring-shaped piezoelectric ceramic chips and electrode chips separately, an off-axis type catenary variable-amplitude structure and the like, and initiates and strengthens flexural vibration when longitudinal vibration is output; the amplitude transformer is a cylindrical bar with uniform cross sections, and a relative angle between the amplitude transformer and a front cover plate is adjustable; and the cutter is installed in an offset way in the radial direction at the tail end of the amplitude transformer, and the offset degree can be adjusted. The working frequency of the invention is higher than 20kHz and can better achieve the ultrasonic machining effect; the elliptical cutting track is long, the minor axis proportion is reasonable, so that the advantages of elliptical cutting can be fully used; the elliptical track can be adjusted to better adapt to machining of different machining materials and different cutting consumption; and single-point diamond ultraprecise cutting can be hopefully expanded to machining of iron-based materials and optical crisp and hard materials.

Description

technical field [0001] The invention relates to an ultra-precision machining functional component, in particular to an elliptical ultrasonic vibration auxiliary cutting device with adjustable trajectory. Background technique [0002] In the field of ultra-precision machining, single point diamond turning technology (Single Point Diamond Turning, SPDT) is an innovative technology. SPDT adopts single crystal diamond tools with a blunt edge radius of 50nm or less, equipped with corresponding ultra-precision machining tools and numerical control systems, which can cut and process various complex planes, spherical surfaces and aspheric surfaces, and the cutting depth is within 5μm. , a super-precision mirror surface with surface accuracy < 0.5 μm and surface roughness Ra < 10nm can be obtained in one cutting. [0003] However, the existing SDPT is limited to a few non-ferrous metals such as high-purity oxygen-free copper, silicon-free aluminum alloy, and electroless nickel...

AI Technical Summary

Problems solved by technology

These types of devices have their own advantages and disadvantages. Among them, the resonant device has the advantages of high operating frequency and good ultrasonic processing effect, and has more applications, but its elliptical trajectory is difficult to adjust; although the non-resonant device has a low operating frequency, it can The frequency range and elliptical locus are generally adjustable and occupy a part of the share; the single excitation source device has significant advantages such as simplifying the transducer structure, simplifying the power supply, improving work stability, and reducing costs, but the existing single excitation source device produces The elliptical trajectory is generally very flat, and the short axis is less than 20% of the long axis, and the advantages of elliptical cutting have not been fully utilized. Although the structure of the multi-excitation source device is complex and the design and manufacture are cumbersome, due to the independent excitation of the long and short axes of the ellipse, the long , The proportion of the short axis is reasonable, and it cannot be replaced by a single excitation source device

Images