Ultrasonic vibration assisted grinding fluid microchannel infiltrated nano-fluid trace lubrication and grinding device

Abstract

The invention discloses an ultrasonic vibration assisted grinding fluid microchannel infiltrated nano-fluid trace lubrication and grinding device and aims at solving the problem that undeformed abrasive dust thickness has larger influence on the grinding process in the prior art. The ultrasonic vibration assisted grinding fluid microchannel infiltrated nano-fluid trace lubrication and grinding device has the beneficial effects that the lubrication state of single abrasive grains when a material is removed in the grinding process is fully considered from microscopic, and the effect of ultrasonic vibration assisted grinding in improving the cooling and lubrication effects of nano-fluid trace lubrication is effectively realized. According to the technical scheme, the device comprises an ultrasonic vibration mechanism capable of regulating the position of an ultrasonic vibrator space, a nano-fluid trace lubrication and grinding mechanism and a grinding force measurement mechanism; the ultrasonic vibration mechanism is arranged on a workbench; the nano-fluid trace lubrication and grinding mechanism is arranged above a workpiece fixing table; the grinding force measurement mechanism comprises a dynamometer and a grinding force controller which is connected with the dynamometer; and the dynamometer is arranged at the bottom of the ultrasonic vibration mechanism.

Description

technical field [0001] The invention relates to the field of grinding processing, in particular to a nano-fluid micro-lubrication grinding device in which ultrasonic vibration assists the wetting of grinding fluid microchannels. Background technique [0002] With the continuous development of the vast mechanical processing fields such as machinery, automobiles, aerospace, and optical devices, a large number of components with higher and higher performance requirements have emerged, and precision and ultra-precision processing technologies occupy an increasingly important position. The traditional grinding process produces large grinding force and high grinding temperature, which aggravates the wear of the grinding wheel and the damage of the processed surface; seriously restricts the processing accuracy and processing efficiency of parts, and urgently needs a new grinding process to solve such problems. Nanofluid lubrication for ultrasonic vibration assisted grinding is one...

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Problems solved by technology

However, the radial ultrasonic vibration of this device is only provided by the piezoelectric ceramic sheet, and the radial ultrasonic vibration is unreliable; the manufacturing cost of the ultrasonic vibrator support in this device is high, and the installation and fixing of the ultrasonic vibrator on the support is inconvenient

[0009] In summary, in the prior art, the ultrasonic vibration is not applied in the tangential direction parallel to the midpoint of the contact arc length between the grinding wheel and the workpiece and in the direction perpendicular to the tangent, and there is no microscopic angle and under the condition of ultrasonic vibration for abrasive grinding. The influence of the grinding chip thickness and the contact arc length between the grinding wheel and the workpiece on the minimum quantity lubrication was studied.

The thickness of undeformed grinding debris has a great influence on the grinding process. It not only affects the size of the force acting on the abrasive grains, but also affects the size of the grinding specific energy and the temperature of the grinding area, resulting in damage to the grinding wheel. wear and its effect on machined surface integrity

Moreover, when the feed speed of the workpiece is low, the energy conversion is slow, the grinding depth is large, the contact arc length between the grinding wheel and the workpiece is long, the contact area is large, the time experienced by the abrasive grains is long, and part of the energy is slowly transmitted to the workpiece. It is easy to cause burns on the surface of the workpiece

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