Kitagawa QB300, Instruction Manual, Page: 32 / 62

31
5-3. 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 6.3s, and make
a shape with a sufficient thickness which does not distort.
2. Preparation of the plug for forming
・
Prepare the plug for machining the gripping part of the
forming ring. The surface roughness of the plug outside
diameter is to be approximately 6.3s, and make a shape
with sufficient thickness which does not distort.
・
It is convenient to prepare various outside diameter
dimensions for dimensions of forming parts.
・
It is convenient to process tapping in the center part of the
plug and to guide with a bolt, etc.
3. Process of the plug gripping part for forming
・
Close the master jaw with the switch valve to grip the plug.
Adjust the ring with the plug so that the ring can grip the jaw
at the center of jaw stroke.
・
From the part witch grips the forming plug. Machining the
part of
φ
d in the same diameter as the external diameter
of the forming plug.
4. 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 in order for the ring not to be tilted. Repeat chucking
several times to stabilize the ring.