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

FIELD: manufacturing technology.

SUBSTANCE: invention relates to devices for restoration of worn-out working surface of tool, in particular plastering rule, by removal of material from working surface of the latter. Device for restoration of working surface of plastering rule contains horizontal base with longitudinal guides, made in form of longitudinal grooves in horizontal base; fixing elements for arrangement of plastering rule, made with possibility of covering plaster rule ends and fixation by screw clamps in longitudinal grooves; carriage with a handle installed on it and a working tool made in the form of an abrasive stone fixed in a mandrel having thrust elements arranged thereon in front and behind with the possibility of transmitting force applied to the 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 its 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 carriage and indicator is located on movable base to determine 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. Abrasive stone along length in cross section is made with right polyhedron in form of hexagon fixed in appropriate enveloping mandrel, number of faces of which is one less than number of faces of polyhedron, having connector in lower part. Mechanism of fixation of abrasive stone in the mandrel is made in the form of a screw clamp located in the middle part of the mandrel along the length and coaxially to the vertical axis of the cross section of the polyhedron. Nut is fixed on external top part of mandrel with possibility of interaction with screw made on axis of handle, with possibility of movement in hole on mandrel and interaction of screw face with surface of upper face of abrasive stone.

EFFECT: as a result, expansion of operational capabilities due to increased service life of abrasive tool.

1 cl, 2 dwg