Simulation and Experimental Research on Dual-Disk Magnetic Preparation Based on Magneto-Elastic Abrasive

doi:10.12141/j.issn.1000-565X.220404

Abstract

Abstract:

Magneto-elastic abrasive is magnetic and has low elastic modulus as well as excellent grinding performance. It can improve the quality and efficiency of process. Firstly, the magnetic edge preparation mechanism was analyzed based on the theory of magnetic field and magneto-elastic abrasive characteristics. Secondly, secondary development for discrete element software EDEM was carried out based on magnetic force of magneto-elastic abrasive in magnetic field, and a simulation model of dual-disk magnetic edge preparation process was established. The effects of particle size, magnetic susceptibility and disk spacing on the number of edge collisions and abrasive rotation velocity were studied. Finally, Matlab software was used to reconstruct the edge contour and an improved shape factor characterization method based on preparation area was proposed. The influence of particle size, magnetic susceptibility and disk spacing on edge preparation value was studied by orthogonal experiment, and the feasibility of proposed improved shape factor characterization was verified. The results show that, the number of edge collisions and the rotation speed of abrasive increase with the increase of particle size, the increase of magnetic susceptibility and the decrease of disk spacing. In addition, the degree of influence of preparation parameters on the preparation amount of the cutting edge in descending order is particle size, disk spacing and magnetic susceptibility, and the optimal preparation parameter groups are particle size 40 mesh, magnetic susceptibility 0.1, and disk spacing 15 mm. The maximum relative error of preparation area between simulation and experiment is 16.33% and the minimum relative error is 0.42%. Simulation can better predict preparation morphology of the cutting edge, and the improved edge shape factor can better characterize the preparation morphology of the cutting edge.

Key words: magneto-elastic abrasive, cutting tools, magnetic preparation, EDEM secondary development, improved shape factor

CLC Number:

TG71

ZHAO Xuefeng, YOU Ke, YUAN Yin, et al. Simulation and Experimental Research on Dual-Disk Magnetic Preparation Based on Magneto-Elastic Abrasive[J]. Journal of South China University of Technology(Natural Science Edition), 2023, 51(5): 130-140.

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Table 1

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Table 3

Comparison of preparation area between simulation and experiment"

实验编号	仿真钝化面积/μm²			实验钝化面积/μm²			相对误差/%
实验编号	$Δ S γ$	$Δ S α$	$Δ S$	$Δ S γ$	$Δ S α$	$Δ S$	相对误差/%
1	28.69	28.66	57.35	31.27	32.33	63.60	9.83
2	40.37	40.40	80.77	35.86	39.84	75.69	6.71
3	17.76	17.74	35.50	17.50	17.51	35.01	1.40
4	9.67	9.65	19.32	9.62	9.62	19.24	0.42
5	17.94	17.91	35.85	17.20	17.00	34.21	4.79
6	29.92	29.90	59.82	29.29	30.28	59.57	0.42
7	5.68	4.62	10.30	7.10	5.21	12.31	16.33
8	7.32	6.72	14.04	8.62	7.28	15.90	11.70
9	4.80	4.59	9.39	4.58	4.27	8.85	6.10

Table 3

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水平	磨粒粒度	磁化率	磁盘间距
极差	0.372	0.053	0.219
k₁	0.972	0.736	0.841
k₂	0.728	0.775	0.836
k₃	0.600	0.789	0.622

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