Cutting Force Prediction Method for Ultrasonic Vibration Side Grinding of Brittle Materials

Abstract

The invention provides a prediction method of cutting force of ultrasonic vibration side face grinding of a brittle material. By analyzing the movement track and the cutting surface morphology of a single abrasive grain, the critical cutting depth and the maximum cutting depth which are generated when plastic-brittle conversion happens in a single rotating period are determined, and therefore average cutting depth and average cutting force in the plastic flow eliminating stage and in the brittle breakage eliminating stage can be determined; contrastive analysis is performed on the practical eliminating volume of all abrasive grains and the theoretical eliminating volume of the single abrasive grain, and the number of effective abrasive grains participating in processing is determined; and influences of tool abrasion, cutting temperature and machine tool stiffness are comprehensively considered and a comprehensive influence coefficient K is introduced, a prediction model of cutting force F is established, a prediction model of final cutting force F is established, and cutting force generated under different processing parameters is predicted. By means of the prediction method, the prediction result conforms to the actual processing conditions better, and prediction precision of the cutting force of ultrasonic vibration side face grinding of the brittle material can be remarkably improved.

Description

technical field [0001] The invention relates to the field of ultrasonic vibration grinding processing, in particular to a cutting force prediction method for ultrasonic vibration side grinding of brittle materials. technical background [0002] Brittle materials such as ceramics have the advantages of good wear resistance, corrosion resistance, biocompatibility and high temperature thermal stability, so they are widely used in the fields of aerospace, precision instruments and medical repair. But at the same time, the characteristics of high hardness and low fracture toughness of this kind of material determine that its processing process is relatively difficult. Therefore, in the prior art, ultrasonic vibration side grinding technology is usually used to realize the processing of brittle materials, so as to improve the processing efficiency and processing quality of brittle materials. [0003] In the process of ultrasonic vibration side grinding of brittle materials, the c...

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the existing cutting force prediction method fails to consider the plastic flow removal stage of the material and assumes that all abrasive particles participate in the cutting process at the same time, which cannot reflect the real processing status, and proposes a method for ultrasonic vibration side grinding of brittle materials The prediction method of cutting force realizes the accurate prediction of cutting force in the process of ultrasonic vibration side grinding of brittle materials

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