Abstract
Because of the random distribution of diamond abrasive grains on the surface and the obstruction of chip flow during processing, conventional grinding tool cannot meet the requirements of the machining precision. Therefore, the emergency of special grinding tools such as surface structured grinding wheels improves the machining precision. In this study, rhombus textured grinding tools with different arrangement angles α are manufactured, the grinding mechanism of them is studied, the penetration depth model and grinding force model are established, and the grinding performance of conventional grinding tool and rhombus textured grinding tools are compared. It can be found that when α = 50°, the surface quality of the rhombus textured grinding tools for grinding single crystal silicon and BK7 is significantly better than that of conventional grinding tool, and the surface roughness of single crystal silicon machined by rhombus textured grinding tool is 20.2–37.4% smaller than that of conventional grinding tool. The instantaneous grinding forces of the two kinds of tools are compared, they both conform to the sinusoidal change, but the amplitude of the instantaneous grinding force of conventional grinding tool is at least 22.1% bigger than that of the rhombus textured grinding tool with α = 50°. Furthermore, the average grinding force of the rhombus textured grinding tool with α = 50° is not only very stable, but also much smaller than that of conventional grinding tool. Finally, in order to verify the average grinding force model, the test value of the average grinding force of the rhombus textured grinding tool with α = 50° and the predicted value of the model are compared, when the cutting depth is 20 μm and the material is single-crystal silicon, the average error in the x direction and y direction are 15.2% and 19.0%, respectively.
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Abbreviations
- L :
-
Length of the rhombus unit
- w :
-
Width of the rhombus unit
- w d :
-
Width of overlapping area between rhombus units
- W :
-
Width of the grinding tool
- R tool :
-
Radius of the grinding tool
- Δy :
-
The center distance in vertical direction between two adjacent rows of rhombus units
- α :
-
The angle between the line of the center point of a column of rhombus units and the vertical direction
- L i :
-
The distance between adjacent grains in the (i)th row
- p 0 :
-
The maximum grain penetration depth
- p 0, t :
-
Instantaneous penetration depth of grain at time t
- ω :
-
Angular speed of the grinding tool
- v w, v s :
-
Velocity of workpiece and grinding tool
- s :
-
The amount of translation of the workpiece in the time interval when the grinding tool is rotated through the two adjacent grains
- a p :
-
Radial cutting depth
- a z :
-
Axial cutting depth
- n :
-
Rotation speed of grinding tool
- θ″:
-
Grain phase angle at time t
- d s :
-
Grain diameter
- b 1, b 2 :
-
Grain bottom and top widths respectively
- H t :
-
The total height of single grain
- S c :
-
Projection area of grain
- β :
-
Friction angle
- γ :
-
Grain rake angle
- φ :
-
Shear angle
- τ s :
-
Shear strength of the workpiece
- σ c :
-
The convential flow stress of the material
- w r, w c , r :
-
The number of grain rows in one rhombus unit and the number of grains in that row
- n r, n c :
-
The total number of rows and columns of rhombus units
- F c, F p :
-
Tangential and normal grinding forces respectively
- G ( i , j ) ,( p , q ) :
-
The position of the (j)th grain in the (i)th row of the rhombus unit in (p)th row (q)th column
- ψ ( i , j ) ,( p , q ) :
-
The phase angle of G(i,j),(p,q) at time t
- F c , t ,( i , j ) ,( p , q ) :
-
The momentary cutting force of G(i,j),(p,q)
- F p , t ,( i , j ) ,( p , q ) :
-
The momentary plowing force of G(i,j),(p,q)
- f s :
-
Sampling frequency of the dynamometer
- t pr :
-
Time of the tool per rotation
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Acknowledgements
The authors would like to thank the support of DONGGUAN SENYONG DIAMOND TECHNOLOGY Co., LTD, China.
Funding
This work was supported by the National Natural Science Foundation of China (grant number 51575096) and the China Fundamental Research Funds for the Central Universities (grant number N180304014).
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Jun Cheng contributed to the conception of the study; Zhaozhi Guo performed the data analyses and wrote the manuscript; Jun Wu performed the experiment; Xifeng Zhang and Baoyu Liu helped perform the analysis with constructive discussions.
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Guo, Z., Cheng, J., Wu, J. et al. Modeling and experimental study on the grinding performance of precision diamond grinding tool with defined texture. Int J Adv Manuf Technol 124, 737–758 (2023). https://doi.org/10.1007/s00170-021-08372-w
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DOI: https://doi.org/10.1007/s00170-021-08372-w