E2 Systems BE 481, Руководство пользователя

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Tool holders and Cutting tools
The unit can be equipped with the following tool holder types: (Choosen when ordering.)
Key Chuck: Drill Chuck: Tapping spindle: Collet Chuck: Collet with compensation
The following cutting tools can be used with drilling or tapping unit:
Drilling unit BE 48: Drills, Core Drills, Shank Mills, Countersinkers, Reamers or Brotsch.
Tapping unit BEG 48: Cutting Taps or forming Taps.
Drilling, Countersinking and Reaming
1. The transition from rapid advance to working feed must be set, see chapter “Settings” paragraph 1, so
that a margin of safety is provided allowing the speed to change to working feed before the tool reaches
the workpiece. Measure the distance from the leading edge of the tool to the workpiece and set the
distance in accordance with, Fig. 12, Pos.3 for a somewhat shorter distance.
Note! When the unit is equipped with a linear transducer, consideration must be taken to the reaction
time of the valve so that the value set using the external control system is sufficiently shorter than the
measured distance to allow braking.
2.
Drilling depth and forward-reverse position should be set in accordance with chapter “Settings” par. 2.
3. Should the air pressure used on the feed cylinder result in a working feed rate that is too high, limit the
rate in accordance with chapter “Settings” paragraph 6.
Tapping
Tapping may be performed using a reversing die head or by reversing the tapping units electric motor.
Please note, that when reversing the electric motor, a tapping spindle with an axially floating tap holder
must be used.
1.
When tapping, set the working feed rate at a somewhat lower value than that of the speed of the tap.
Tap speed can be calculated in accordance with the following: Rpm: 60 x pitch in mm = mm/sec.
Measure a distance and divide it by the measured time to determine the speed.
2.
Tapping depth is then set using the forward-reverse position. See chapter “Settings” paragraph 2.
Note! When setting, the working feed rate must not be altered, as this will affect the tapping depth.
When tapping with a tapping spindle, the signal for reversing the electric motor must be given when the
feed spindle reaches the forward-reverse position.
3. The retraction rate of the feed spindle must be adapted to the speed of the tap at withdrawal to prevent
the axial movement of the die head or the tapping spindle from hitting bottom during retraction. The
speed is regulated using a throttle-check valve in accordance with chapter ”Settings” paragraph 6.
4. When tapping short lengths where the axial movement of the die head or tapping spindle take up the
entire tapping length, the feed spindle can be run to the positive stop after the tap strikes the piece and
then commence retraction after a predetermined time.
5.
When using low retraction rates it may be necessary to delay initiation of the electric motors rotation for
withdrawal of the tap. This is due to the fact that air pressure in the plus chamber of the feed cylinder
must have time to drop for the feed spindle to retract.