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Tham khảo tài liệu 'machinery's handbook 27th episode 2 part 4', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Machinery s Handbook 27th Edition Table 5a. Turning-Speed Adjustment Factors for Feed Depth of Cut and Lead Angle Ratio of Chosen Feed to Optimpn Ratio of the two cutting speeds given in the tables Depth of Cut and Lead Angle 1 in. 25.4 mm 0.4 in. 10.2 mm 0.2 in. 5.1 mm 0.1 in. 2.5 mm 0.04 in. 1.0 mm 1.00 1.10 1.25 1.35 1.50 1.75 2.00 15 45 15 45 15 45 15 45 15 45 Feed Feed Factor Ff Depth of Cut and Lead Angle Factor Fd 1.00 1.0 1.0 1.0 1.0 1.0 1.0 1.0 0.74 1.0 0.79 1.03 0.85 1.08 1.0 1.18 1.29 1.35 0.90 1.00 1.02 1.05 1.07 1.09 1.10 1.12 0.75 1.0 0.80 1.03 0.86 1.08 1.0 1.17 1.27 1.34 0.80 1.00 1.03 1.09 1.10 1.15 1.20 1.25 0.77 1.0 0.81 1.03 0.87 1.07 1.0 1.15 1.25 1.31 0.70 1.00 1.05 1.13 1.22 1.22 1.32 1.43 0.77 1.0 0.82 1.03 0.87 1.08 1.0 1.15 1.24 1.30 0.60 1.00 1.08 1.20 1.25 1.35 1.50 1.66 0.78 1.0 0.82 1.03 0.88 1.07 1.0 1.14 1.23 1.29 0.50 1.00 1.10 1.25 1.35 1.50 1.75 2.00 0.78 1.0 0.82 1.03 0.88 1.07 1.0 1.14 1.23 1.28 0.40 1.00 1.09 1.28 1.44 1.66 2.03 2.43 0.78 1.0 0.84 1.03 0.89 1.06 1.0 1.13 1.21 1.26 0.30 1.00 1.06 1.32 1.52 1.85 2.42 3.05 0.81 1.0 0.85 1.02 0.90 1.06 1.0 1.12 1.18 1.23 0.20 1.00 1.00 1.34 1.60 2.07 2.96 4.03 0.84 1.0 0.89 1.02 0.91 1.05 1.0 1.10 1.15 1.19 0.10 1.00 0.80 1.20 1.55 2.24 3.74 5.84 0.88 1.0 0.91 1.01 0.92 1.03 1.0 1.06 1.10 1.12 Use with Tables 1 through 9. Not for HSS tools. Tables 1 through 9 data except for HSS tools are based on depth of cut 0.1 inch lead angle 15 degrees and tool life 15 minutes. For other depths of cut lead angles or feeds use the two feed speed pairs from the tables and calculate the ratio of desired new feed to optimum feed largest of the two feeds given in the tables and the ratio of the two cutting speeds Vavg Vopt . Use the value of these ratios to find the feed factor Ff at the intersection of the feed ratio row and the speed ratio column in the left half of the table. The depth-of-cut factor Fd is found in the same row as the feed factor in the right half of the table under the column .
