Method and device of full-domain cutting force modeling in rotary ultrasonic vibration milling

Abstract

The invention provides a method and a device of full-domain cutting force model in rotary ultrasonic vibration milling. By carrying out the kinematics analysis between a tool abrasive grain and a workpiece material interaction in the machining process, a technology parameter matching relation meeting the vibration separation of a cutting area is obtained, and a condition equation of an intermittent cutting characteristic is established; and according to an ultrasonic vibration auxiliary scratch test, critical press-in depth of ductility or brittleness removal mode changing of a material is obtained, the abrasive particle press-in depth distribution relation of the cutting area is established, the abrasive grain loads of different positions of the cutting area are accumulated, and ductilityor brittleness cutting force model is obtained correspondingly, the models are fused according to the critical press-in depth and the maximum cutting thickness, and the rotary ultrasonic vibration machining whole-domain cutting force model is obtained. According to the device, the rotary ultrasonic vibration machining characteristic and a removing mechanism can be more comprehensively reflected,so that the cutting force prediction and the technology optimization of the actual machining can be effectively guided.

Description

technical field [0001] The present invention relates to the technical field of ultrasonic vibration machining, and more specifically, to a method and device for modeling global cutting force of rotary ultrasonic vibration milling and grinding. Background technique [0002] With the continuous improvement of equipment service performance requirements in the industrial field, advanced materials such as composite materials and ultra-high temperature ceramics have been widely used. At the same time, due to the high strength and high hardness of this kind of material, the processing process is prone to many problems such as large cutting force and serious processing damage. Traditional cutting processing technology is difficult to meet its manufacturing needs. [0003] Rotary ultrasonic vibration milling is an effective technical approach to realize high-efficiency and low-damage processing of high-performance materials, but the research on this technology is still insufficient. ...

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Problems solved by technology

[0005] However, due to the complexity of the rotary ultrasonic vibration machining process and the large number of process parameters involved, the cutting force empirical model cannot effectively predict the machining process under different process conditions.

However, the theoretical analysis modeling method is only based on a single material removal mechanism for cutting force modeling, which cannot fully reflect the cutting characteristics of hard and brittle materials ultrasonic vibration machining, so it is difficult to guide the cutting force control and process optimization in actual machining

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