Table 4 Response table for S/N ratio.

From: Machinability and ANN based prediction of surface roughness for TiAlN and PCD coated end mill cutters on AA6061 hybrid composite

Uncoated carbide tool

Surface roughness, Ra

Width to thickness ratio

Level

SS (rpm)

DoC (mm)

FR (mm/min)

Level

SS (rpm)

DoC (mm)

FR (mm/min)

1

− 13.047

− 14.738

− 2.598

1

10.838

15.809

13.435

2

− 11.288

− 8.461

− 8.634

2

12.358

7.301

16.567

3

− 2.723

− 3.859

− 15.828

3

19.080

19.166

12.275

Delta

10.324

10.879

13.230

Delta

8.242

11.865

4.292

Rank

3

2

1

Rank

2

1

3

TiAlN coated tool

Surface roughness, Ra

Width to thickness ratio

Level

SS (rpm)

DoC (mm)

FR (mm/min)

Level

SS (rpm)

DoC (mm)

FR (mm/min)

1

7.950

9.485

7.094

1

26.98

27.66

28.42

2

6.022

6.321

7.541

2

25.61

23.94

23.28

3

8.325

6.491

7.663

3

20.04

21.04

20.93

Delta

2.303

3.164

0.569

Delta

6.94

6.62

7.49

Rank

2

1

3

Rank

2

3

1

PCD tool

Surface roughness, Ra

Width to thickness ratio

Level

SS (rpm)

DoC (mm)

FR (mm/min)

Level

SS (rpm)

DoC (mm)

FR (mm/min)

1

17.226

13.755

13.165

1

23.52

21.77

22.66

2

13.338

12.709

12.771

2

18.71

21.26

24.02

3

8.657

12.756

13.285

3

28.54

27.74

24.09

Delta

8.569

1.046

0.514

Delta

9.82

6.48

1.42

Rank

1

2

3

Rank

1

2

3

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