Общий каталог Yamawa 2021 - страница 702

Предыдущая страница Следующая страница

Навигация

19. The mechanism for a tap to cut oversize on an internal thread

3. Tapping with an improper feed condition

Process of over-cutting due to excessive feed With cutting edge b1, cutting starts.

Workpiece Cutting part by b1

over-cutting at axial direction

Not Go gauge

SP

SL

Tap

Position between workpiece and tap after the tap rotates 1 turn.

Distance of excess feeding Workpiece

Excessive-cutting of the thread with excessive feeding

PO

ST

ROLL

CARBIDE

Cutting trace by b1 Tap

Position between workpiece and tap after the tap rotates 2 turns. LONG

Workpiece Distance of HAND excess feeding

TAPS

Tap

The position between workpiece and tap after 3 rotations of tap.

Workpiece Distance of excess feeding

Tap

Solutions Feed adjustment is strongly recommended.

  • (Use fully synchronous feed system and fixing holder)

When using machines that do not have the synchronous feed system, such as drilling machine.

  • Adjust the correct weight balance of main spindle

properly.

  • Use an axial/radial floating holder for adjustment.

EG (STI)

Not Go gauge SPECIAL
Over-cutting of the thread byTHREADS,
too slow feedingGAUGES
Process opposite of excessive
feeding factors causes extra material
cutting at back frank.THREAD
MILLS
over-cutting during tapping
The tap mounting condition in the holder.DIES
The condition of bored hole.
The cutting oil selection.
Incorrect adjustment of feed balance.
Selection of the tap depending onCENTER
material being cut.DRILLS

Technical