Two-dimensional compliant vibration platform with wedge pre-tightening

Abstract

The invention discloses a two-dimensional compliant vibration platform with wedge pre-tightening. The platform includes driving sources, a compliant vibration platform, a base and wedge pre-tighteningdevices. The compliant vibration platform includes arc type flexible hinges, outer straight beam type flexible hinges, a work table, inner straight beam type flexible hinges and a compliant vibrationplatform outer frame. When the driving sources in two directions move at the same time, the work table generates mechanical vibration in two directions so as to realize two-dimensional vibration assisted processing. The driving sources provide micron-level vibration for the work table through the arc type flexible hinges. The outer straight beam type flexible hinges and the inner straight beam type flexible hinges are arranged symmetrically about the work table so as to realize the decoupling motion of the work table and provide guarantee for the high precision motion of the vibration platform. The vibration platform uses the wedge pre-tightening devices, and so the adjustment is more intuitive and the pre-tightening force is even. The driving sources of different types and sizes are pre-tightened by adjusting the position of pre-tightening screws, and so the adaptability is strong.

Description

technical field [0001] The invention relates to the field of precision machining and special machining, in particular to a wedge-shaped preloaded two-dimensional compliant vibration platform. Background technique [0002] Micro-milling technology plays an extremely important role in processing micro-parts with complex structures and small sizes. However, when processing hard and brittle materials, problems such as tool wear, poor surface quality, and low processing efficiency are prone to occur. Vibration-assisted machining has the advantages of reducing cutting force, reducing tool wear rate, reducing burr formation, processing hard and brittle materials and improving surface finish. Therefore, vibration-assisted micro-milling has become an effective processing method when processing difficult-to-machine tiny parts such as hard and brittle materials. [0003] The size of the ultrasonic horn and ultrasonic transducer is large, which has a great influence on the stiffness o...

AI Technical Summary

Problems solved by technology

[0003] The size of the ultrasonic horn and ultrasonic transducer is large, which has a great influence on the stiffness of the micro milling machine

The document with the application number 201610202687.6 discloses a two-dimensional ultrasonic vibration platform based on a flexible hinge structure, which provides two-dimensional vibration for the platform of the flexible hinge structure through two ultrasonic generators arranged perpendicular to each other, but its size is large, and it is difficult for micro The rigidity of the milling machine has a great influence

At the same time, it has no pre-tensioning device. Due to the rigidity of the platform, when the ultrasonic generating device vibrates at high frequency, the ultrasonic horn and the platform are separated from each other, and the processing accuracy cannot be guaranteed.

[0004] At present, the vibration platform driven by piezoelectric ceramics mostly uses screws to preload directly, but there are problems such as unintuitive preload adjustment and uneven preload.

And a vibration platform can only use one type of piezoelectric ceramics, the adaptability is not strong

Images