HOWA MACHINERY H3EF, Инструкция по эксплуатации, Страница: 42 / 52

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3.6.2 When Gripping Work piece
NOTE:
ANSI B11.6-1984 prescribes installation of a shielding cover (guard) so that no part of the
operator's body can be caught between a part of the chuck and the surface of the work
piece when the space in between exceeds 1/4 inch with the jaws fully opened.
3.6.3 During Cutting Operations
To comply with ANSl B11.6-1984 section 4.3.2, you need to install a
check valve and an accumulator in the connecting area with the
chuck so that the hydraulic or pneumatic system does not loose
pressure in case of failure.
Besides check valve and accumulator, it is essential to install a
shielding cover that separates the chuck and work piece from the
operator or bystanders. Without such a cover, the work piece,
chips or tool fragments will fly out, causing severe injury or death
to the operator and/or bystanders.
When gripping the work piece with the chuck, be careful not to get
any part of your body caught between the top jaws and the work
piece or between the work piece and the machine. The operator's
hand may be injured.
In any of the following cases, the tool impact on initial cutting
contact may result in an unexpected cutting force in excess of
chuck workholding capacity:
The back end of the work piece is away from the chuck’s stopper
face.
The rotating center of the work piece is not aligned with the chuck
rotating center.
The work piece is a casting or forging part having a projecting gate
or burr.
This may cause the work piece to slip out, which may in turn,
cause severe injury or death to the operator or bystanders. If this
situation is possible, begin tool contact with the work piece
initially during a low speed test run.
Fig.16
WARNING
CAUTION
WARNING