Material Removal Mechanism During Ultrasonic Vibration Assisted Grinding AISI 304 with Single CBN Grain

doi:10.12068/j.issn.1005-3026.2024.07.013

Abstract

Abstract:

In order to explain the removal mechanism of abrasive cutting materials under ultrasonic action， the single grain grinding process was analyzed， and the mathematical model of undeformed cutting thickness and the fixed velocity ratio （v_s/v_w） of abrasive and workpiece was established. The single grain tests of conventional grinding （CG）， tangential ultrasonic vibration assisted grinding （TUVAG） and radial ultrasonic vibration assisted grinding （RUVAG） with a fixed speed ratio were carried out on AISI 304 specimens. The results showed that the specimens are removed by plastic deformation under the action of CG and TUVAG at the fixed speed ratio， but the ultrasound significantly improves the material removal rate. The material removal method of the specimen under RUVAG was closely related to the value of the maximum undeformed cutting thickness a_gmax. When a_gmax is less than 0.8 μm， the specimen was removed in the form of brittle fracture. After that， with the increase of a_gmax， the specimen was removed in the form of plastic deformation.

Key words: single CBN（cubic boron nitride） grain, undeformed cutting thickness, ultrasonic vibration assisted grinding, surface topography, material removal mechanism

CLC Number:

TH 164

Zhen-yu YANG, Ping ZOU, Liang ZHOU, An-qi WANG. Material Removal Mechanism During Ultrasonic Vibration Assisted Grinding AISI 304 with Single CBN Grain[J]. Journal of Northeastern University(Natural Science), 2024, 45(7): 1011-1019.

Figures/Tables 9

Fig.1 Cutting thickness of single abrasive grain in the conventional grinding

Fig.2 Cutting thickness of single abrasive grain in the ultrasonic grinding

Fig.3 Schematic diagram of radial ultrasonic grinding

Fig.4 Chip formation condition during the single

Fig.5 Experimental device for the single grain grinding

Fig.6 Single grain grinding wheel

Table 1 Grinding conditions

参数	数值
a_p/mm	0.02
v_s/(m·s^-1)	3.7，7.3，11.0，14.7
v_w/(mm·min^-1)	2~100
A/μm	0，6，8，10，12
a_gmax/μm	0.3~2

Fig.7 Single grain grinding groove topography at different maximum UCT for AISI 304

Table 2 Test parameters in Fig.7

磨削方式	v_w/(mm·min^-1)	a_gmax/μm
CG/RUVAG	2	0.3
CG/RUVAG	6	0.5
CG/RUVAG	15	0.8
CG/RUVAG	33	1.2
CG/RUVAG	51	1.5
CG/RUVAG	90	2.0
TUVAG	2	0.3
TUVAG	6	0.5
TUVAG	16	0.8
TUVAG	35	1.2
TUVAG	55	1.5
TUVAG	98	2.0

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