Общий каталог Tungaloy 2020 - 2021 - страница 1672

Drilling procedure o n machining centers and lathes

Proceed as instructed below in order to maximize the tool performance.

1 Drill a pilot hole

1 Hole diameter tolerance: +0.01 - +0.1 mm Hole depth: H = 20 mm Please use DrillMeister or DrillForce-Meister for a pilot hole 20 mm Use a drill with 3xD or smaller

2 Start coolant

2 Slowly insert DeepTri-Drill into the pilot hole 3 No. of revolution: n = 50 - 100 min-1 Feed speed: Vf = 100 - 300 mm/min 3 Caution: Do not rotate the drill at a full machining speed before engaging the pilot hole. 5

4 Stop the drill at 15 mm depth

5 Start rotating at full machining speed

4 15 mm

6 Start feeding

6 At the entry (H = 15 - 25 mm): Feed: f = 80% of programmed feed Hole depth: H H * 25 mm Feed: f = 100%

8 Stop For a through hole

7 Continue drilling until the drill head passes through the workpiece by 5 mm 7 Stop the rotation and coolant

8

5 mm 9 Return the drill

9 How to use a trlg type d e e p t r i - d r i l l o n a horizontal machining center o r boring machine When using the TRLG drill on a conventional machining center or horizontal boring machine where there are no drilling-bush supports available, a pilot hole needs to be further deepened with a MCTR drill to better support the long gundrill. A long

gundrill such as the TRLG type drill tends to “whip” when the pilot hole is too short to support the gundrill. 1 Drill a pilot hole 1

2 Expand the pilot hole deeper using a MCTR

2 MCTR

drill

3 TRLG

4 TRLG

5 TRLG

3 Drill with a TRLG drill at a reduced rotation

and feed. Use the following parameters: No. of revolution: n = 50 - 100 min-1 Feed speed: Vf = 100 - 300 mm/min

4 When DeepTri-Drill reaches all the way

to the end of the pilot hole, increase drill

rotation to full machining speed.

5 Start feeding to complete the drilling

(Caution)

Always use Step to prevent the gundrill from whipping, which may lead to drill 2

breakage and a possible superfluous injury.