Kitagawa HG-A97-212, Инструкция по эксплуатации

Страница: 18 / 25

17
４．
Forming soft jaw with outside diameter gripping
１．
Preparation of the ring for forming
・
Prepare the ring for forming. The surface roughness
of the ring inside diameter and part to locate in jaw
front surface are to be approximately 25s, and make
a shape with a sufficient thickness which does not
distort.
・
Recommended gripping dia.
φ
d
＝φ
119
、
a
＝
6
２ ．
Process of the ring gripping part for
forming
・
Operate the switch valve and maximize the opening
of the jaw.
・
Then, process the
φ
D part (part to grip the ring for
forming). Set the dimension
φ
D so that gripping
near the center of the jaw maximum stroke
(diameter) is possible.
・
φ
D =
φ
d + (jaw maximum stroke/2)
３．
Gripping of the ring for forming
・
By operating the switch valve, grip the ring for
forming in the
φ
D part. At this time, grip by
pressing the ring on the jaw front surface in order for
the ring not to be tilted. Repeat chucking several
times to stabilize the ring.
・
Set the hydraulic pressure during forming the same
as during processing of the work, or slightly higher.
・
When the ring distorts, lower the hydraulic pressure
or change the ring into a shape which does not
easily distort.