Method for predicting axial direction cutting force of supersonic vibration auxiliary grinding for fragile materials

Abstract

The invention provides a method for predicting the axial direction cutting force of supersonic vibration auxiliary grinding for fragile materials. The method includes the steps that the kinematics characteristics and the indentation characteristics of a single abrasive grain are analyzed under the supersonic vibration auxiliary action, the effective cutting time of the single abrasive grain, the relation of the average cutting force and the maximum impact force of the single abrasive grain, the material removal size and the number of effective abrasive grains participating in machining within a vibration period are determined, the relation of axial direction cutting force and cutter parameters, workpiece material performance parameters, cutting parameters and vibration parameters is established ultimately, the number of the effective abrasive grains participating in machining and the plastic deformation removal of materials are comprehensively considered, a octahedron material removal size calculation method is put forward, a predicator formula of the axial direction cutting force Fa is established, the formula is more close to the real machining condition, and therefore the precision for predicting the axial direction cutting force of supersonic vibration auxiliary grinding for fragile materials is improved.

Description

technical field [0001] The invention relates to the field of ultrasonic vibration-assisted grinding, in particular to an axial cutting force prediction method for ultrasonic vibration-assisted grinding of brittle materials. Background technique [0002] Brittle materials such as ceramics are widely used in the fields of aero-engine manufacturing, precision instruments and medical repair due to their advantages of wear resistance, corrosion resistance, biocompatibility and high temperature stability. But at the same time, this type of material has high hardness and low fracture toughness, which makes it difficult to process. Therefore, ultrasonic vibration-assisted grinding technology can be introduced into the processing of brittle materials, thereby improving processing efficiency and quality. [0003] In the process of ultrasonic vibration-assisted grinding of brittle materials, the cutting force directly affects the stability of the cutting process and the surface qualit...

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Problems solved by technology

[0006] The purpose of the present invention is to address the deficiencies in the prior art, and propose a method for predicting the axial cutting force of ultrasonic vibration-assisted grinding of brittle materials. Cutting processing, the removal volume of a single abrasive particle is a cuboid, and the material is only removed by brittle fracture, which cannot reflect the real processing conditions, so as to realize the accurate prediction of the axial cutting force in the ultrasonic vibration-assisted grinding process of brittle materials

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