Experimental Study on Micro-scale Grinding of 2.5D Cf /SiC Composites

doi:10.12068/j.issn.1005-3026.2024.08.010

Abstract

Abstract:

In order to improve the surface quality of 2.5D C_f/SiC composites in micro?grinding， a three?factor and five?level micro?grinding orthogonal experiment was carried out with 500# diamond abrasive and 0.9 mm diameter electroplated micro?grinder. The influence of micro?grinding speed v_s， grinding depth a_p and feed speed v_w on the grinding performance evaluation parameters （grinding force， surface roughness and surface morphology） was analyzed by range and variance. The variation law of grinding performance evaluation parameters with process parameters was analyzed through the test results at different levels. The results showed that the grinding depth has the greatest influence on grinding performance， and the feed speed has the least influence. When the grinding depth and feed speed increase， the surface roughness and grinding force gradually increase， and there are more surface defects； when the micro?grinding speed is increased， the surface roughness and grinding force gradually decrease， the surface morphology is flat and uniform， and there are fewer defects.

Key words: 2.5D C_f/SiC composite, micro?grinding, grinding force, surface roughness, surface topography

CLC Number:

TH 161

Yuan-feng LI, Quan WEN, Ya-dong GONG, Ben-jia TANG. Experimental Study on Micro-scale Grinding of 2.5D C_f/SiC Composites[J]. Journal of Northeastern University(Natural Science), 2024, 45(8): 1143-1149.

Figures/Tables 14

References 15

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参数	数值
抗拉强度/MPa	280
抗弯强度/MPa	220
密度/(g·cm^-3)	2.0
纤维直径/μm	7
碳纤维体积分数/%	37

参数	数值
抗拉强度/MPa	280
抗弯强度/MPa	220
密度/(g·cm^-3)	2.0
纤维直径/μm	7
碳纤维体积分数/%	37

因素	水平
因素	1	2	3	4	5
v_s/(m·s^-1)	0.471	0.942	1.414	1.885	2.356
a_p/μm	3	6	9	12	15
v_w/(μm·s^-1)	20	70	120	170	220

因素	水平
因素	1	2	3	4	5
v_s/(m·s^-1)	0.471	0.942	1.414	1.885	2.356
a_p/μm	3	6	9	12	15
v_w/(μm·s^-1)	20	70	120	170	220

试验序号	v_s	a_p/μm	v_w	F_n/N	F_t/N	R_a/μm
试验序号	m·s^-1	a_p/μm	μm·s^-1	F_n/N	F_t/N	R_a/μm
1	0.471	3	20	0.420	0.327	1.014
2	0.471	6	70	0.598	0.425	1.316
3	0.471	9	120	0.818	0.561	1.729
4	0.471	12	170	0.985	0.675	2.091
5	0.471	15	220	1.231	0.830	2.613
6	0.942	3	70	0.458	0.341	1.056
7	0.942	6	120	0.604	0.433	1.323
8	0.942	9	170	0.796	0.582	1.810
9	0.942	12	220	0.889	0.632	1.962
10	0.942	15	20	1.026	0.703	2.183
11	1.414	3	120	0.503	0.355	1.125
12	1.414	6	170	0.618	0.441	1.367
13	1.414	9	220	0.788	0.560	1.742
14	1.414	12	20	0.806	0.568	1.761
15	1.414	15	70	0.931	0.654	2.024
16	1.885	3	170	0.486	0.348	1.079
17	1.885	6	220	0.524	0.377	1.165
18	1.885	9	20	0.716	0.511	1.585
19	1.885	12	70	0.801	0.559	1.736
20	1.885	15	120	0.928	0.663	2.051
21	2.356	3	220	0.438	0.315	0.971
22	2.356	6	20	0.481	0.334	1.034
23	2.356	9	70	0.695	0.498	1.542
24	2.356	12	120	0.808	0.575	1.784
25	2.356	15	170	0.912	0.647	2.005