MIL-G-23823E
reversal,
shall be infinitely variable from a minimum of not more than 1/4
inch to the maximum stroke of the machine. Means shall be provided to prevent
over-travel of the table in the event of a malfunction in the automatic table
reversing mechanism. Manual traversing of the table shall be by handwheel,
lever, or similar device. The table shall have an adjustable dwell control (O
to not less than 2-1/2 seconds) for interrupting table movement at each table
reversal. The table reversing mechanism, at all constant traverse rates,
shall repeat within an accuracy of 0.004 inch at each table reversal.
3.4.5 Swivel table. The swivel table shall be mounted on the traversing
table and shall be capable of swiveling in the horizontal plane for grinding
included angles and tapers. Swivel adjustment shall be sufficient to grind a
13 degree included angle taper. A scale , indicating taper, graduated in both
inches per foot and degrees of angle shall be provided. Means shall be
provided for locking the swivel table in the desired position. When T-slots
are provided for longitudinal adjustment of the headstock and footstock, they
shall conform to ANSI B5.1.
3.4.5.1 Swivel table alignment device. Unless otherwise
specified (see
6.2) the machine shall have a swivel alignment device which shall be operated
by either mechanical or electronic means. The device shall allow rapid
adjustment of the swivel table, in relation to the sliding table, to obtain
and hold accurate parallelism of the work or for accurate angular setting for
grinding taper.
3.4.6 Grinding wheelhead assembly. The grinding wheelhead assembly shall
include a wheelhead housing,
spindle,
and spindle drive mechanism. The
assembly shall be mounted on guideways provided on the bed and shall traverse
cross axially (X axis) to the table. The crossfeed range shall permit
grinding from the stated maximum diameter to 0.000 diameter. A graduated scale
shall be provided indicating swivel position in increments of not less than
one degree. Means for locking the wheelhead in place after setting shall be
supplied. The spindle shall be dynamically balanced and shall be supported by
precision antifriction bearings designed to minimize axial and radial play.
spindle bearings shall be
continuously lubricated or permanently
The
lubricated and sealed for life.
3.4.6.1 Automatic feed. The machine shall have provisions for automatic
infeed of the abrasive wheel at each table reversal, for traverse grinding
operations. The arrangement shall include means for controlling infeed
increments at desired reversals and for limiting the total infeed for the
traverse grinding cycle. the wheelfeed mechanisms shall be actuated upon each
reversal of the table's longitudinal movement.
3.4.6.2 Manual infeed. A safety interlock shall prevent simultaneous oper-
ation of the automatic and the manual wheelhead infeed. Manual infeed shall
be accomplished utilizing a handwheel or other device. The hand feed shall
have both a coarse and fine feed with a scale or indicator graduated in
accordance with 3.2.1.1.
10
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business