Bi-piezoelectric vertical elliptical vibration cutting device suitable for vertical type excircle machining

Abstract

The invention relates to a bi-piezoelectric vertical elliptical vibration cutting device suitable for vertical type excircle machining, and belongs to the technical field of micro-nano and ultra-precision manufacturing and processing of complex optical elements of difficult-to-process materials. A series connection integrated flexible hinge substrate is connected with two piezoelectric stacks respectively; a displacement measurement baffle is installed on the series connection integrated flexible hinge substrate; a capacitive displacement sensor is installed on a displacement sensor holder; the displacement sensor holder is installed on the series connection integrated flexible hinge substrate; and a diamond cutter is installed at the front end of the series connection integrated flexible hinge substrate through tightening screws. The bi-piezoelectric vertical elliptical vibration cutting device has the advantages as follows: the structure is novel; the series connection integrated flexible hinge substrate is formed by one-time processing; the whole structure is simple relatively; the device is easy to manufacture; and errors caused by assembly are reduced to a great extent. The bi-piezoelectric vertical elliptical vibration cutting device is small in size and low in mass and can realize high-frequency elliptical vibration cutting easily.

Description

technical field [0001] The invention belongs to the technical field of micro-nano and ultra-precision manufacturing and complex optical parts processing of difficult-to-machine materials, and in particular relates to a two-piezoelectric vertical elliptical vibration cutting device suitable for vertical cylindrical processing. Background technique [0002] In recent years, with the rapid development of science and technology, some precision parts application fields have higher and higher requirements for the processing accuracy of parts. The application of diamond tools plays an important role in improving the precision of precision parts processing. However, the traditional processing technology is limited. For ferrous metal materials, the tool wears too fast, which makes it difficult to greatly improve the machining accuracy of the parts. For the precision machining of difficult-to-machine materials, a breakthrough in the processing method is urgently needed. Vibration cutti...

AI Technical Summary

Problems solved by technology

The former belongs to the resonance type device, and its main feature is that it can achieve a higher frequency in the process of processing. According to the current statistics, the processing frequency of the elliptical vibration cutting can reach up to 60KHZ, but the resonance type elliptical vibration cutting device also has some inherent characteristics. For example, in the process of processing, it is necessary to achieve resonance according to the natural frequency of the device itself, and then carry out cutting processing. In this way, the processing frequency cannot be adjusted, and at the same time, coupling between vibration modes of each order is easy to occur, and the control is more difficult. , so in terms of device design, non-resonant elliptical vibration cutting devices have gradually attracted the attention of researchers. Non-resonant elliptical vibration cutting devices are generally made of flexible hinges driven by piezoelectric stacks. The shape, size and The distribution methods all affect the effect of elliptical vibration cutting

The elliptical trajectory of the diamond tip is synthesized according to the distribution method of the flexible hinge. The currently designed elliptical vibration cutting device can generate two-dimensional elliptical motion trajectory and three-dimensional elliptical motion trajectory. Different trajectories can process different ranges. Elliptical vibration cutting is very According to the current literature records, the resonance type device consists of two types: flexible hinge parallel connection type and flexible hinge series type. Non-resonance type elliptical vibration cutting device is generally designed according to the horizontal lathe. The center line of the main shaft is vertical, which can form effective intermittent cutting motion. For vertical lathes, the plane of the elliptical motion trajectory formed by the tool on this type of device is parallel to the center line of the machine tool spindle, which is not conducive to forming intermittent cutting motion.

[0006] At present, the existing non-resonant elliptical vibration cutting device patents can be checked: a kind of mixed-frequency three-dimensional elliptical vibration cutting method mentioned in the patent (CN102078967A), which uses a parallel flexible hinge and is driven by a piezoelectric stack. Because the parallel device is distributed at right angles between its motion axes, it is easy to generate kinematic coupling and it is very difficult to control

The elliptical cutting device mentioned in the patent (CN102059575A) uses a series flexible hinge, but in the design process, the mass of the moving parts is large, it is difficult to achieve high-frequency cutting, and the range of parameter adjustment is limited. Machine tools have high requirements and are not universal

A three-dimensional elliptical vibration cutting device mentioned in the patent (CN102371359A) also has the above-mentioned limitations, and the elliptical vibration cutting device for vertical cylindrical turning has not been reported yet

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