1. Support
the journal of the technical requirements of the general axis of the
assembly parts of the assembly is to support the journal, the axis of
the precision surface are also the bearing heel for the design basis, so
the shaft bearing the accuracy of the most important bearing, its
accuracy Will directly affect the shaft rotation accuracy. Front and rear with a taper of the A, B surface as the main bearing,
the middle of the auxiliary support) its roundness and coaxial (with the
beating index restrictions) have a higher accuracy requirements.
2. The
technical requirements of the thread The spindle thread is used to
assemble the nut. The nut is used to adjust the clearance of the rolling
bearing mounted on the journal. If the nut end is inclined with respect
to the journal axis, the bearing inner ring will be tilted by force. The skew will affect the rotation accuracy of the spindle. So the spindle thread of the teeth to be positive, and the gap between the nut to be small. Must control the nut side of the beating, so that in the adjustment of
the bearing clearance of the micro-movement, the bearing inner ring
pressure direction is.
3. The
technical requirements of the front taper hole The spindle taper hole
is used to install the top or tool of the Morse cone, the cone hole axis
must be coaxial with the axis of the bearing journal, otherwise affect
the top or tool cone installation accuracy, Workpiece produces positioning error.
4. The tip of the front short cone and the end of the technical
requirements of the spindle of the front cone and the end of the
installation of the chuck positioning surface, in order to ensure the
positioning accuracy of the installation chuck its conical surface must
be coaxial with the journal, the end surface must be perpendicular to
the axis of rotation.
5. Other technical requirements for the surface with the gear on the gear
and the surface of the technical requirements are: A, B journal
connection round runout tolerance of 0.015mm, to ensure the smooth
transmission of gears to reduce noise.
The
technical requirements of (3) and (4) are affected by the technical
requirements of (1) and (2). The technical requirements of (3) and (4)
affect the positioning accuracy of the spindle as the assembly
reference, and the technical requirements of (5) , The technical requirements of these surfaces are the key technical issues of spindle machining.
In
summary, the shaft parts, from the rotation accuracy, positioning
accuracy, working noise of these three aspects of its technical
requirements.
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