High-length-to-diameter ratio variable-section slender shaft ultrasonic elliptical vibration turning machining method

Abstract

The invention discloses a high-length-to-diameter ratio variable-section slender shaft ultrasonic ellipse vibration turning machining method, which is a new machining method for turning a high-length-to-diameter ratio variable-section slender shaft by an ultrasonic elliptical vibration turning technique. In the method, an elliptical vibration turning device as well as a sectional clamping technical means are adopted, a turning subsequent working procedure in the conventional turning-aging-milling machining process is not used, the machining time is shortened, the machining efficiency is improved greatly, the precision of a processed slender shaft with the length-to-diameter ratio being 55 is up to a level that the bounce relative to a central hole is less than 0.013 millimeters, and the dimensional precision of the slender shaft is less than a standard of + / -0.05 millimeters. The slender shaft machined by the machining method can better meet the requirements of aeromotor on used high-precision slender variable-section shafts.

Description

Technical field [0001] The present invention involves a method of processing based on ultrasonic ellipse vibration cutting technology. More specially, it refers to a method that uses ultrasonic ellipse vibration technology to perform high -efficiency and high -quality processing of large long -variable section of the cross section. Background technique [0002] In the field of mechanical manufacturing, due to the weak rigidity of the long -diameter ratio (long diameter ratio is greater than 20), the effects of fastening, cutting force, cutting heat, and machine tool vibration during processing are obvious.The knife is too large, tremor and other phenomena, so it has always been one of the problems in processing. At present, the processing of the thin shaft is mostly supported by the central frame., The high -precision processing of the large long axis long axis of the large long diameter ratio cannot be achieved. [0003] Due to the special processing mechanism of ellipse vibrat...

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Problems solved by technology

[0002]In the field of machinery manufacturing, due to the weak rigidity of the slender shaft with a large aspect ratio (aspect ratio greater than 20), it is subjected to clamping force, cutting force, Cutting heat, vibration of machine tools, etc. are obviously affected. During the processing, it is easy to cause the tool to be too large, chatter and other phenomena, so it has always been one of the difficult problems in processing. At present, the processing of slender shafts is mostly supported by the center frame, and the tool rest It is carried out in the form of support, the machining accuracy is very low, and the machining length-to-diameter ratio is limited, and it is impossible to realize high-precision machining of slender shafts with large length-to-diameter ratio and variable cross-section.

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