The invention provides a dual-excitation ultrasonic elliptical vibration-cutting device. The dual-excitation ultrasonic elliptical vibration-cutting device comprises a longitudinal vibration ultrasonic vibrator and a bent ultrasonic vibrator, wherein the longitudinal vibration ultrasonic vibrator comprises a first pre-tightening bolt and a longitudinal vibration rear cover plate, piezoelectric ceramic, an electrode slice and a longitudinal vibration front cover plate which sleeve the first pre-tightening bolt; the bent ultrasonic vibrator comprises a second pre-tightening bolt as well as a bent vibration rear cover plate, piezoelectric ceramic, an electrode slice and a bent vibration front cover plate which sleeve the second pre-tightening bolt, wherein a tool is connected onto the bent vibration front cover plate; and the first pre-tightening bolt is connected onto the bent vibration rear cover plate. Through the longitudinal vibration ultrasonic vibrator, two phases, in the radial direction of the device, of the longitudinal vibration ultrasonic vibrator, and in the axial direction of the device, of the bent ultrasonic vibrator have excitation of certain phase difference, so thatthe device has a dual-bent-vibration mode, and therefore, an elliptical vibration track is output on the tool. The dual-excitation ultrasonic elliptical vibration-cutting device is remarkable in effect in high-integrity processing of a crisp and hard difficult-to-process material, can remarkably reduce tool abrasion, restrains processing flutter, reduces concave pits and micro cracks of the processing surface, and reduces workpiece surface roughness.

Dual-excitation ultrasonic elliptical vibration-cutting device

The invention provides a single-excitation ultrasonic oval turning device comprising an ultrasonic power source, a device shell and an ultrasonic oval vibration cutting unit sealed in the device shell. The ultrasonic power source is connected to the device shell. The device shell is detachably connected to the workbench of the machine tool. The ultrasonic oval vibration cutting unit comprises an input end fixed to the device shell, an output end connected with a cutter and multiple vibration transmitting rods connected between the input end and the output end. The multiple vibration transmitting rods are different in structural properties, so that phase difference exists between the phases of vibration, and then an oval vibration path is output. By means of designing and replacing two-grade vibration transmitting rods, the output oval vibration path can be changed, in combination with different machining application occasions, the oval vibration path is reasonably adjusted, and then better machining quality is obtained. By the adoption of the single-excitation oval vibration implementation scheme, ultrasonic oval vibration output is stable, the overall structure is easy and convenient, and industrialization is facilitated to be achieved.

Single-excitation ultrasonic oval turning device

The invention provides a single-excitation three-dimensional ultrasonic elliptic turning device The device comprises an ultrasonic power supply, a device shell and an ultrasonic elliptic vibration cutting unit in the device shell, wherein the ultrasonic power supply is connected with the device shell; the device shell is fixed on a worktable of a machine tool; the ultrasonic elliptic vibration cutting unit comprises an input end which is fixed on the device shell, an output end which is connected with a cutter and a plurality of vibration rods which are connected between the input end and theoutput end; and the plurality of vibration rods are different in the aspect of structural property, so that the phases of vibration have phase differences so as to output three-dimensional elliptic tracks The device has the characteristics of being simple in structure, small in machining interference, high in cutting efficiency, adjustable in three-dimensional vibration track of the cutter and relatively high in applicability

Single-excitation three-dimensional ultrasonic elliptic turning device

The invention discloses a predicting method for the chamfering tool machined fiber-reinforced composite material burr length, and belongs to the technical field of composite material machining. The method comprises the steps that in the implementation process, firstly, chamfering tool geometric dimension and shape contour data is measured, a tool-workpiece contour geometric model is built, the fiber configuration fabric internal chamfering tool wedge angle is calculated on the basis, a fiber configuration fabric internal chamfering tool-fiber mutual effect geometric model is built on the basisof the cut-out side fiber direction angle, and the position where non-breakage fiber is broken for the first time is determined and the burr length is calculated on the basis. According to the method, on the basis of the fiber-reinforced composite material burr production mechanism, the prediction model for the chamfering tool machined fiber-reinforced composite material production burr length isbuilt, the content involved in the method is comprehensive and complete, and operation is easy.

Predicting method for chamfering tool machined fiber-reinforced composite material burr length

The invention discloses an ultra-precision machining method of a tungsten alloy complex curved surface part. The method comprises the following steps that in an ultra-precision machining laboratory with constant temperature and humidity, oil-based cutting fluid is adopted, and a hard alloy cutter is used for carrying out rough cutting machining on a tungsten alloy workpiece; and an ultrasonic elliptical vibration cutting device is started, amplitude and phase difference of two-phase vibration are adjusted, and complete separation type ultrasonic elliptical vibration cutting is carried out on tungsten alloy by using a single crystal diamond tool to obtain the high-precision high-integrity surface of the tungsten alloy workpiece. The ultra-precision machining of the tungsten alloy complex curved surface part is realized by adopting ultrasonic elliptical vibration cutting technology, the abrasion of the single crystal diamond cutter can be effectively reduced, pits and microcracks on themachined surface of the tungsten alloy workpiece can be inhibited, and the surface roughness of the workpiece can be reduced.

Ultra-precision machining method of tungsten alloy complex curved surface part

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