An ultrasonic grinding spindle

Abstract

The invention discloses an ultrasonic grinding spindle, which comprises a spindle box, and an ultrasonic horn is arranged in the spindle box, and a flange I is fixed on the rear end of the ultrasonic horn, and the flange I The headstock is rotatably connected with the bearing I, the front end of the ultrasonic horn is fixed with the flange II in the headstock, and the flange II is rotatably connected with the headstock through the bearing II, The grinding device is adjacent to the flange II, and the part of the ultrasonic horn between the flange I and the flange II is half or an integer of the wavelength of the wave emitted by the ultrasonic transducer times. The present invention utilizes bearing support at the node position of the ultrasonic horn, and directly connects with the grinding wheel at the node position close to the front end of the ultrasonic horn, and through the propagation process of ultrasonic vibration in the grinding wheel, the vibration of the outer circular surface of the grinding wheel is maximized, thereby improving Ultrasonic grinding spindle rigidity and rotation accuracy, and the connection does not heat up.

Description

technical field [0001] The invention relates to the field of precision grinding of difficult-to-machine materials, in particular to an ultrasonic grinding spindle. Background technique [0002] At present, ultrasonic assisted machining has been increasingly used in high-performance alloys, hard and brittle materials and new advanced materials. Ultrasonic-assisted processing technology is a processing technology that applies ultrasonic vibration to traditional processing tools or workpieces to obtain better processing performance. Ultrasonic assisted grinding is one of the important technologies in ultrasonic assisted machining technology. In the traditional grinding process, large grinding force and grinding heat will be generated, which will cause a series of problems, such as the surface / subsurface of the workpiece Damage and lower grinding wheel life, the existence of these processing defects seriously restricts the processing accuracy and processing quality of parts. I...

AI Technical Summary

Problems solved by technology

[0005] The disadvantage of the above-mentioned patent is that there is at least a quarter-wavelength horn between the support bearing at the front end of the ultrasonic grinding spindle and the installation position of the grinding wheel, so that the grinding wheel can obtain a larger amplitude, which results in a relatively large overhang of the front end of the ultrasonic grinding spindle. Large, which reduces the support stiffness of the spindle, magnifies the spindle support error, and reduces the rotation accuracy of the grinding wheel. At the same time, the amplitude of the connection between the ultrasonic grinding spindle horn and the grinding wheel is relatively large, and ultrasonic vibration energy loss is easily generated at the connection, resulting in heat generation.

These problems will have a great impact on the machining accuracy and machining quality of the ultrasonic grinding spindle.

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