High-speed rotation ultrasonic grinding main shaft

Abstract

The invention provides a high-speed rotation ultrasonic grinding main shaft. A high-coaxiality conical hole is used for positioning, and the centering precision is improved. Through the design of a flange in the shape like the Arabic number 7, the contact distance is lengthened, one-time machining is conducted, and the installing reliability of an ultrasonic transducer is improved. No mechanical contact exists between a primary coil and a secondary coil, and no abrasion exists. A closed space is formed by an aluminum shell, and magnetic field leakage is obstructed. Cold nitrogen makes direct contact with a heating piezoelectric ceramic piece in a main shaft cavity, a large amount of heat is brought away, and the heat dissipation efficiency is improved.

Description

technical field [0001] The invention relates to a high-speed rotating ultrasonic grinding spindle, which belongs to the field of mechanical manufacturing. Background technique [0002] Hard and brittle materials, such as advanced ceramics, glass, silicon crystals, etc., have relatively high hardness, brittleness, wear resistance, corrosion resistance, and oxidation resistance. In hole processing, due to its high hardness and low fracture toughness, it is difficult to process and prone to cracks or even fragments; the grinding force is large, a large amount of heat is generated, the parts are burned, and the tool wears quickly. The processing methods currently used include traditional grinding, abrasive flow processing, magnetic grinding, traditional ultrasonic processing, and rotary ultrasonic grinding. [0003] Rotary ultrasonic grinding is a composite processing technology that combines traditional grinding and ultrasonic machining. like figure 1 As shown, in addition t...

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Problems solved by technology

[0008] The patent with the application number of 201610416213.1 in the prior art discloses a rotating ultrasonic spindle that can quickly replace the acoustic system. It does not have a transducer cooling scheme; the transducer installation scheme uses bolts. Inevitably poor; the transducer power supply scheme uses carbon brushes, disadvantages: physical contact, serious wear and tear

[0009] The patent application number 201410721228.x discloses a rotating ultrasonic spindle supported by magnetic suspension bearings, which does not have a transducer cooling scheme; the transducer installation scheme uses bolts and end faces, and its disadvantages are: poor alignment and many assembly links; The power supply scheme of the transducer is wrapped with no aluminum shell, and the power supply is induced

Disadvantages: magnetic flux leakage, low transfer efficiency

[0010] The patent with the application number 201420871562.9 discloses an ultrasonic grinding composite spindle structure, which does not have a transducer cooling scheme; the transducer installation scheme uses bolts and end faces, and the disadvantages are: poor alignment; the transducer power supply scheme uses carbon brushes , disadvantages; physical contact, severe wear and tear

[0011] The patent with the application number 201010525882.5 discloses a rotating ultrasonic spindle, which does not have a transducer cooling scheme; the transducer installation scheme uses bolts and end faces, the disadvantages: poor alignment; the transducer power supply scheme uses carbon brushes, the disadvantages; physical contact, heavy wear

[0016] 4. The main shaft does not use a cooling device, the cooling effect is low, and the cooling device is complicated

The cooling effect is low because the cooling medium is not in direct thermal communication with the ultrasonic transducer

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