Ultrasonic oval vibrating mechanism for assisting diamond cutter in ultra-precision cutting

Abstract

The invention relates to an ultrasonic oval vibrating mechanism for assisting a diamond cutter in ultra-precision cutting. The ultrasonic oval vibrating mechanism is characterized by comprising a cutter handle, a vibrating unit and a cutter, wherein one end of the cutter handle has a step-shaped structure; the vertical surfaces and the horizontal surfaces of an upper layer step and a lower layer step are provided with grooves; the vibrating unit comprises a vibrating body consisting of a transverse vibrating rod and a longitudinal vibrating rod which are vertical to each other; the top surface of the joint of the transverse vibrating rod and the longitudinal vibrating rod is provided with a groove; the end part of the transverse vibrating rod is provided with a transverse end face; the other side of the transverse end face is provided with a transverse excitation source and a transverse cover plate in sequence; the end part of the longitudinal vibrating rod is provided with a longitudinal end face; the other side of the longitudinal end face is provided with a longitudinal excitation source and a longitudinal cover plate in sequence; the transverse end face is formed on the vertical surface of the upper layer step of the cutter handle; the transverse cover plate and the transverse excitation source are positioned in the groove of the upper layer step; the longitudinal end faceis formed on the horizontal surface of the lower layer step of the cutter handle; the longitudinal cover plate and the longitudinal excitation source are positioned in the groove of the lower layer step; and the cutter is arranged in the groove at the joint of the transverse vibrating rod and the longitudinal vibrating rod.

Description

technical field [0001] The invention relates to an ultrasonic assisted cutting mechanism, in particular to an ultrasonic elliptical vibration mechanism for assisting ultra-precision cutting of a diamond tool. Background technique [0002] Natural single-point diamond tools are widely used in the field of ultra-precision machining, because the radius of the single-point diamond cutting edge is extremely small, and the corresponding ultra-precision CNC machine tools can be used to process non-ferrous metals to obtain a surface shape accuracy of less than 0.5 μm and a surface finish of less than 5nm ultra-precise mirror. However, the current single-point diamond cutting technology is difficult to process iron-based materials, because during the machining process, a severe thermal-chemical reaction occurs between the carbon atoms of the diamond tool and the iron atoms of the workpiece, which causes severe wear of the tool, and the cutting cannot be continued. very bad. In orde...

AI Technical Summary

Problems solved by technology

Most of the existing elliptical vibration cutting devices adopt the transducer-horn structure, which works at the resonant frequency of the structure, cannot change the vibration frequency, and is difficult to adjust the elliptical trajectory, and cannot adapt to cutting parameters, processing materials and surface shapes. Variety

At the same time, the existing resonant vibrating cutting device is generally a circular cross-section rod-shaped structure or its combination, which is not easy to install. It is necessary to design a special tool holder to fix the cutting device, and the structure of the cutting device is not well stressed and rigid, which restricts the machining surface. quality improvement

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