文档介绍:C 19 侧边进给径向进给 B C D E F G A H 侧边进给径向进给 Parting and grooving Threading Milling Drilling Boring Tool holding Turning Machinability Other information How to apply Three different types of infeed How to apply Modified flank infeed Radial infeed Incremental infeed The infeed method can have a significant impact on the thread machining process. It influences: - chip control - insert w ear - thread quality - tool life. In practice, the machine tool, insert geometry, workpiece material and thread pitch influence the choice of infeed method. ? Used by all manual machines and most C programs. ? First choice for work hardening materials and suitable for fine pitches. ? Most new C machines can be programmed for modified flank. ? Used with C-geometry as the chip break er will not function with radial infeed. ? Axially directed cutting forces reduce the risk of vibra - tions. ? Controlled chip direction. ? Normally used with ver y large profiles and pitches, long work threading cycles where tool life needs to match the length of the thread. ? Requires special programming. 侧边进给径向进给 C 20 B C D E F G A H Parting and grooving Threading Milling Drilling Boring Tool holding Turning Machinability Other information Modified flank infeed ? C machines have a programmed cycle using this infeed. ? Chip is similar to that in conventional tur ning - easier to form and guide. ? Chip