Installation part and method for the production thereof
The invention relates to an installation part for mounting an upper support roll in a roll stand. The installation part has, on its cambered side, a lubricant receiving space, from which at least one lubricant drain hole ( 130 ) extends, in the lower region of the installation part, in the direction of the drain side of the installation part. In order to be able to reduce the width in the lower region of the installation part and while guaranteeing the stability of the installation part, it is proposed according to the invention that the distance d from the center point of the lubricant drain hole ( 130 ) to the vertical longitudinal center plane LM of the installation part is ≦half of the diameter of the main hole and that—in the vertical longitudinal center plane—the vertical minimum distance s from the counter-surface of a ring seal ( 400 ) in the lower region of the installation part to the horizontal tangential plane ( 500 ) at the top edge of the lubricant drain hole is not below a specified minimum clearance threshold value.
1. An installation part for supporting an upper back-up roll ( 200 ) having a roll body ( 210 ) and two roll necks ( 220 - 1 ), in a rolling mill stand, comprising:
opposite drain side ( 100 -A) and cambered side ( 100 -B);
a main bore ( 110 ) for receiving one of the roll necks and extending from the drain side ( 100 -A) to the cambered side ( 100 -B);
a lubricant receiving space ( 120 ) provided on the cambered side ( 100 -B), formed as a circular groove that surrounds the main bore ( 110 ), and having, in a lower region of the installation part ( 100 ), a widening ( 120 - 1 ) extending in axial and circumferential directions;
an annular seal ( 400 ) located in the lower region of the installation part ( 100 ); and
at least one lubricant drain hole ( 130 ) extending from the lubricant receiving space ( 120 ) on the cambered side in direction of the drain side ( 100 -A) of the installation part ( 100 ), the lubricant drain hole ( 130 ) having a center point a distance (d) of which to a transverse longitudinal middle plane (LM) of the installation part ( 100 ), viewing in direction of the cambered side, is smaller than or equal to half of a diameter of the main bore ( 110 ),
characterized in that
the annular seal ( 400 ) has a counter-surface ( 600 ) a minimal distance (s) of which to a horizontal plane ( 500 ) extending tangentially at a top edge of the at least one lubricant hole, in the transverse longitudinal middle plane (LM) is greater than 2 mm and less than 10 mm, and
that the installation part ( 100 ) has a wall ( 106 ) remote from the cambered side ( 100 -B) and limiting the lubricant receiving space ( 120 , 120 - 1 ), the wall ( 106 ), viewed from a longitudinal axis (L) of the installation part ( 100 ) outwardly, extending smoothly in a radial direction of the installation part ( 100 ).
2. An installation part according to claim 1 ,
characterized in that
the installation part ( 100 ) has, on the cambered side ( 100 -B) thereof, a seal retaining element for retaining the annular seal ( 400 ) and which is formed as one piece with the installation part ( 100 ).
3. An installation part ( 100 ) according to claim 1 ,
characterized in that
the installation part ( 100 ) has a further lubricant drain hole ( 130 ), the at least one lubricant drain hole and the further lubricant drain hole being arranged mirror-symmetrically relative to the transverse longitudinal middle plane (LM) in the lower region of the installation part.
4. An installation part ( 100 ) according to claim 1 ,
characterized in that
the installation part ( 100 ) has an inner surface ( 105 ) having, at least in region of the lubricant receiving space ( 120 , 120 - 1 ), a cylindrical profile for force-and form-lockingly receiving a cylindrical bearing bush received in the main bore ( 130 ).