Каталог Iscar вращающийся инструмент 2017 - страница 280

When plunging starts from a pre-drilled hole, the initial diameter of the hole Di should be larger than the plunger diameter Dt.

Note: After each axial plunge stroke, move 45º from the horizontal, a distance of at least 0.5 mm. Only after this move can you move up and away for a rapid exit. See Sketch 6.

The PLH...- type (trepanning) plungers have a hollow center. This requires a specific pattern so the column that remains after each plunge is removed completely and smoothly. The coordinates in Table 1 produce the pattern shown in Sketch 7. This provides the optimal results for the PLH D75-27-13 type plunger (outer diameter of 75 mm, inner diameter of 24 mm).

Sketch 5 Di > Dt Di Dt

ae max = 11 mm

Sketch 6 0.5 mm min

45ϒ

Sketch 7

C C C

F H F

B B B

X X X

A A A G

D D

Table 1