Edge-chipping reduction in rotary ultrasonic machining of ceramics: Finite element analysis and experimental verification

Experimental investigations on core drilling by ultrasonic-vibration-assisted grinding for hard-to-machine materials - a review

“…It is determined by the diameter of the hole in the fixture. This hole is used to receive the rod drilled from workpiece (Li et al, 2006). …”

“…Cutting force was investigated in constant feedrate machines. The average or maximum cutting force along the feedrate direction was measured by a KISTLER 9257 dynamometer (Churi et al, 2007b(Churi et al, , 2007d(Churi et al, , 2005(Churi et al, , 2009(Churi et al, , 2006Jiao et al, 2005aJiao et al, , 2005bLi et al, 2005aLi et al, , 2006Cong et al, 2009aCong et al, , 2009bCong et al, , 2012a. Tables 3 and 4 summarise experimental investigations on cutting force and torque reported in the literature.…”

“…It includes two parameters: chipping thickness and size, as shown in Figure 9. They were measured on the rod as shown in Figure 8 and measured by a Vernier calliper (Churi et al, 2009;Li et al, 2006). Edge chipping is not acceptable on finished workpieces, since it "not only compromises geometric accuracy, but also causes possible failure of the component during service" (Ng et al, 1996), so it has to be machined off by extra processes after UVAG.…”

“…Six materials and four input variables were studied by three researchers. It was found that chipping size was inversely proportional to rotational speed and diamond grain size and proportional to feedrate and vibration amplitude (Churi et al, 2007d(Churi et al, , 2009Jiao et al, 2005b;Li et al, 2005aLi et al, , 2006Ng et al, 1996). By integrating designed experiments and FEA simulations, Cong et al (2012a) presented that tool rotational speed, ultrasonic power and feedrate have significant effects on edge chipping thickness, and higher rotational speed and vibration amplitude and lower feedrate led to lower edge chipping.…”

Examination of the Average Chipping Rate on the Edges of Milled Granite Surfaces

“…Based on the results of their research, they stated that the edge chipping examination and the evaluating algorithm developed within the scope of the study and described in their article are perfectly applicable for practical examinations. Li et al [3] examined edge chippings in the inner corners of slots formed by abrasive drilling tools. The authors of the article developed a finite element model that assesses the effects of three manufacturing parameters (cutting depth, support length and pre-tightening load) on maximum normal stress and the von Mises stress in the environment of chippings.…”