DEVICE FOR RESTORATION OF WORKING SURFACE OF PLASTERING LEVELING BOARD Russian patent published in 2019 - IPC B23P6/00 B25F1/02 

FIELD: technological processes.

SUBSTANCE: invention relates to devices for restoration of worn-out working surface of tool, in particular plastering leveling board, by removal of material from working surface of the latter. Device for restoration of working surface of plastering leveling board contains horizontal base with longitudinal guides made in form of longitudinal grooves in horizontal base. Fixation elements for arrangement of plastering leveling board are made with possibility of covering plaster leveling board ends and fixation by screw clamps in longitudinal grooves. Carriage with handle and working tool installed on it, made in form of abrasive stone, fixed in mandrel, having thrust elements arranged on it in front and behind with possibility of transfer of force applied to handle, in longitudinal direction to vertical support guides, made with stiffeners and arranged in front and rear of carriage on its sides. Mandrel with abrasive stone is spring-loaded vertically to movable base by means of resilient elements arranged on sides. Mechanism for vertical variation of the working tool height relative to the horizontal base is made in the form of a movable base mounted on the carriage with the possibility of vertical movement relative to the carriage by means of screw adjusting elements located on the sides of the movable base. Scale is located on the carriage and a pointer located on the movable base for determination of the said vertical movement. Carriage is installed on horizontal base with possibility of movement along longitudinal guides by means of rolling elements installed along sides of carriage. On upper surface of mandrel there is through hole located coaxially to vertical axis of cross section of mandrel. Upper and lower cylindrical bushings are rigidly fixed on the mandrel surface from the top and from below on the surface of the mandrel. Upper bushing has inner diameter not larger than inner diameter of lower bushing and is configured to interact with inner surface with axis, which includes limiting thrust washer, fixed on outer surface of axis with possibility of interaction with free end of said bushing. On upper end of axle handle is fixed, and on lower end thread is made with possibility of interaction with threaded tip of female part with abrasive stone. Threaded tip interacts with the inner surface of the lower bush by the outer surface and with the end face with the lower surface of the mandrel. Abrasive stone along perimeter is made in form of circle and is fixed in female part of threaded tip. Line of the diameter of the working surface of the abrasive stone does not coincide with the line of the restored working surface of the plastering leveling board.

EFFECT: as a result, expansion of operational capabilities due to longer service life of abrasive tool and easier maintenance.

1 cl, 3 dwg