4-3. Forming soft jaw with inside diameter gripping
1. Preparation of the ring for forming
・
Prepare the ring for forming. The surface roughness of the ring
inside diameter is to be approximately 25s, and make a shape
with a sufficient thickness which does not distort.
・
It is convenient to prepare various inside diameter dimensions
for dimensions of forming parts.
2. Process of the ring gripping part for forming
・
Unclamp the jaws by turning the handle.
・
Then, process the
φ
D part (part to grip the ring for forming).
・
Decrease
φ
D size more 0~some millimeter than
φ
d. Arrange
jaw positions so that they are not protruded from the chuck
periphery.
3. Gripping of the ring for forming
・
Clamp the plug in the part of
φ
D. At this time, grip by pressing
the ring on the chuck front surface in order for the ring not to be
tilted.
4. Forming
・
Process the gripping part (dimension
φ
D’) of the work in the
state that the ring is kept gripped. The
φ
D’ part is to be
approximately the same diameter (H7) as the diameter of the
gripping part of the work, and process to be surface roughness
at 6s or less.
・
Set the handle torque when forming the same as when
processing of the work, or slightly higher.
・
When the ring distorts, lower the handle torque or change the
ring into a shape which does not easily distort.
5. Trial cutting
・
Remove the ring for forming and grip the work.
・
Implement trial cutting to check the process precision and that
there is no slip, etc.
・
Contacting on the gripping surface is to be 2 points contact of
the side A and the side B when gripping.
20
Summary of Contents for JN N Series
Page 7: ...1 3 Parts list Fig 3 6...
