Usually, in order to fix the entrance guide plate, exit guide plate and lower guard plate, the lower crossbeam is installed on both sides of the entrance and exit of the mill. Only the lower crossbeam is installed on the two-roll mill, and the upper and lower crossbeams are installed on the three-roll mill.
(1) The crossbeam should be firmly and reliably fixed. When using bolts to fix the crossbeam, double nuts must be used; when using the wedge extrusion fixing method, attention should be paid to the penetration direction of the wedge, and the oblique direction of the wedge should be in contact with the surface of the crossbeam to ensure the three-dimensional positioning of the wedge.
(2) The installation of the crossbeam must be horizontal, that is, parallel to the axis of the roll, and the height of the crossbeam should be appropriate. If the horizontal position and height position of the crossbeam are improperly installed, it will directly affect the installation position of the guide plate and the guard plate. When the roll diameter changes greatly, the position of the crossbeam should be adjusted appropriately.
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