Rotary ultrasonic vibration grinding cutting force prediction method

Abstract

The embodiment of the invention provides a rotary ultrasonic vibration grinding cutting force prediction method. The rotary ultrasonic vibration grinding cutting force prediction method comprises the following steps that a first single abrasive particle radial cutting force model in a plastic flow removal mode and a second single abrasive particle radial cutting force model in a brittle fracture removal mode are established correspondingly, by combining a ductile-brittle removal proportion coefficient, a single abrasive particle radial cutting force model is obtained; the condition that a workpiece undergoes combined action of single abrasive particle radial force and friction force in the rotary ultrasonic vibration grinding machining process is considered, and the sum of the component force of radial force of all abrasive particles and the friction force in the main cutting force direction is calculated, so that a main cutting force value is obtained; and finally, an adjusting coefficient C is introduced to be used for ensuring that the ductile-brittle removal proportion coefficient is greater than zero, so that a relational expression between cutting force F and the adjusting coefficient C, material performance parameters, tool parameters, ultrasonic vibration parameters and machining parameters is established. The provided cutting force prediction method more conforms to an actual machining process, and the prediction precision of the rotary ultrasonic vibration grinding cutting force can be improved.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of rotary ultrasonic vibration grinding, and in particular to a method for predicting cutting force of rotary ultrasonic vibration grinding. Background technique [0002] Carbon fiber composite materials have excellent characteristics such as high specific strength, high specific modulus, and low density, so they are more and more widely used in aerospace, automobile, transportation and other fields. Although such materials are generally manufactured in near-net shape, in order to meet the processing accuracy requirements of the assembly process, secondary processing such as milling, drilling, and grinding is still required. However, the reinforced carbon fiber and the matrix resin in carbon fiber composites have significantly different physical and mechanical properties, resulting in anisotropy and discontinuous distribution of phases, making it prone to problems such as fiber breakage...

AI Technical Summary

Problems solved by technology

At present, there is still a lack of a cutting force prediction method that also considers the removal mode of ductile brittleness

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