Surface grinding machine

Abstract

It has special application for preparing surfaces of two pieces of a composite material (fiber and resin) which have to be glued by means of an adhesive, establishing a perfect mutual contact between them. The preparation of the surface needs to be uniformed and without damaging the piece. It consists of a moving frame ( 1 ) which can be displaced along some longitudinal guides ( 25 - 26; 27 - 28 ) integral with a bench ( 2 ) on which the piece ( 4, 6, 8 ) to grind is kept immobile. It includes a casing ( 14 ) containing a tool-carrier head ( 15 ) which rotates inside the casing adopting a floating arrangement for smoothly and uniformly pressing the piece to grind, advancing along the whole of the piece and following the geometry of its surface. The casing ( 14 ) incorporates a nozzle ( 16 ) for connecting the inside of the casing to a suction hose for the dust and other particles produced. Moreover, said casing ( 14 ) can be displaced laterally in order to grind possible lateral surface extensions.

1 . SURFACE GRINDING MACHINE, especially for preparing surfaces of two pieces of composite material (fiber and resin) which have to be glued by means of an adhesive, characterized in that it consists of a moving frame ( 1 ) which is displaceable along some longitudinal guides ( 25 - 26 ;  27 - 28 ) integral with a bench ( 2 ) on which the piece ( 4 ,  6 ,  8 ) to grind is kept immobile; said moving frame ( 1 ) includes a casing ( 14 ) containing a tool-carrier head ( 15 ) which rotates inside it adopting a floating arrangement for smoothly and uniformly pressing an abrasive tool ( 3 ) on the surface of the piece to grind, advancing along the whole of the piece and adapting itself to the geometry of the surface of the piece to grind; said casing ( 14 ) incorporates a nozzle ( 16 ) for connecting the inside of the casing to a suction hose for dust and particles produced during the grinding and for said casing ( 14 ) to be displaceable laterally in order to grind surface extensions existing in one of the two sides of the basically longitudinal direction of the piece ( 4 ,  6 ,  8 ) to grind. 
     
     
         2 . SURFACE GRINDING MACHINE, according to  claim 1 , characterized in that the piece ( 4 ,  6 ,  8 ) to grind is secured to the bench ( 2 ) by means of depression by a voiding system which acts via holes ( 23 ) existing in a support surface of the bench, communicated with internal pipes ( 24 ) and collectors. 
     
     
         3 . SURFACE GRINDING MACHINE, according to  claim 2 , characterized in that said support surface of the bench consists of modular elements ( 22 ) of longitudinal strips which can be separated to a greater or lesser degree in order to clear any projecting zones of the lower surface of the piece ( 4 ,  6 ,  8 ) or the surface opposite to that for grinding, optimizing the seating for the voiding actuation. 
     
     
         4 . SURFACE GRINDING MACHINE, according to  claim 3 , characterized in that the piece ( 4 ,  6 ,  8 ) is immobilized to the bench ( 2 ) with the interposition of additional pieces like cushions with holes, which optimize the seating and transmission of the voiding effect.