A variable-angle two-dimensional ultrasonic vibration assisted machining platform based on flexible hinges

Abstract

A variable-angle two-dimensional ultrasonic vibration-assisted processing platform based on a flexible hinge, including a base plate and a vibration block. The base plate cooperates with the seat ring of the thrust bearing through an annular platform provided on its upper surface, and the vibration block is provided through its lower surface. The circular boss cooperates with the shaft ring of the thrust bearing. The upper surface of the base plate is provided with several flange seats along the circumferential direction. The first ultrasonic vibrator and the second ultrasonic vibrator are respectively installed on two of the flange seats. The horns on the first ultrasonic vibrator and the second ultrasonic vibrator are in close contact with the vibrating block respectively. A mounting base is provided on the upper surface of the base plate. A first flexible hinge is installed in the U-shaped groove of the mounting base. The first flexible hinge is connected to the vibrating block. The vibrating mass fits snugly. The first ultrasonic vibrator and the second ultrasonic vibrator realize two-dimensional ultrasonic vibration processing of the workpiece, avoiding the modification of the spindle. A thrust bearing is installed between the base plate and the vibration block to support the vibration block in the Z direction without affecting the vibration of the vibration block in the XY plane.

Description

technical field [0001] The invention belongs to the technical field of ultrasonic processing, and in particular relates to a variable-angle two-dimensional ultrasonic vibration auxiliary processing platform based on a flexible hinge. Background technique [0002] Since the 1950s, ultrasonic vibration-assisted machining has been gradually applied in the industrial field, and has attracted great attention and interest from many scholars. Ultrasonic-assisted machining technology has developed rapidly. In recent years, it can be seen that ultrasonic-assisted processing technology accounts for a large proportion in the processing technologies of brittle and hard materials represented by engineering ceramics and difficult-to-machine materials represented by titanium alloys. Compared with traditional machining, ultrasonic vibration assisted machining technology has been proved to have clear advantages in reducing cutting force, reducing cutting heat, improving machined surface qual...

AI Technical Summary

Problems solved by technology

Limited to ultrasonic vibration-assisted milling, most of the processing is realized by modifying the spindle, which is expensive and difficult to modify. At the same time, the ultrasonic vibration method of the modified spindle can only drive smaller tools or grinding heads, which is very difficult in actual processing. It is difficult to meet the processing requirements, so it is a feasible idea from the perspective of workpiece vibration

On the other hand, the study of one-dimensional ultrasonic vibration has made great progress, and two-dimensional and even three-dimensional ultrasonic vibration has become a research hotspot. If the two-dimensional vibration is realized by transforming the main shaft, only longitudinal-bending compound vibration or longitudinal-torsional compound vibration can be used. , its design and development process is very complicated, and can only achieve two-dimensional vibration at a fixed angle

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