Ultrasonic single-excitation elliptical vibration grinding design method and device

Abstract

The invention discloses an ultrasonic single-excitation elliptical vibration grinding design method and device. A transducer, an amplitude-change pole and a cup-shaped grinding tool of the device areconnected together through prestressed bolts and nuts, the transducer converts electrical signals provided by an ultrasonic generator into longitudinally-transmitted mechanical vibration, sound wavesof the longitudinal vibration are transmitted to the cup-shaped grinding tool through the transmission effect of the amplitude-change pole, and the cup-shaped grinding tool is divided into a disk segment and a circular pipe segment; and longitudinal vibration excitation of the amplitude-change pole enables the disk segment of the cup-shaped grinding tool to do transverse bending pitch circle typevibration, longitudinal vibration of the circular pipe segment is formed through coupling, and compounding of the three different vibration modes of longitudinal vibration-bending vibration-longitudinal vibration is achieved; through the bending vibration of the disk segment and the longitudinal vibration of the circular pipe segment, composite vibration of longitudinal and radial vibration is shown through coupling at the tail end of the circular pipe segment, in the longitudinal and radial plane, the longitudinal and radial vibration can be coupled to form an elliptical vibration trajectory,the design of a resonant system is simplified, and vibration of a grinding wheel disc is made more ideal.

Description

[0001] Technical field: [0002] The invention relates to an ultrasonic grinding device, in particular to an ultrasonic single excitation elliptical vibration grinding design method and device. [0003] Background technique: [0004] Ultrasonic grinding is a processing technology formed by applying high-frequency vibration to the tool or workpiece on the basis of traditional grinding methods. It is a finishing process that is effective for difficult-to-machine materials such as composite materials and hard and brittle materials. Ultrasonic elliptical vibration grinding is based on the single linear reciprocating motion of ordinary ultrasonic grinding abrasive grains, and adds a vertical ultrasonic high-frequency motion, which is coupled to form an elliptical periodic motion trajectory of abrasive grains. The ultrasonic elliptical vibration mode can reduce the grinding force and grinding heat of a single abrasive grain, and increase the material removal rate. [0005] The desig...

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Problems solved by technology

However, in some special occasions, the workpiece or tool is the direct load of the horn. Since its material, structure, size, etc. are determined by its use requirements, it cannot be designed according to the system resonance frequency. It is a non-resonance unit.

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