Unpacking device, machining device having the same, and method for removing a thin-walled packing wrapper from a workpiece

Abstract

The invention relates to an unpacking device (30) which is designed to remove a thin-walled packaging wrapper (10) from a workpiece (1), having a processing station (P) having a workpiece receptacle (31) for receiving the workpiece (1), and having a pair of counter-rotating rollers (40, 41) which are mounted so as to be rotatable about counter-rotating axles (GA1, GA2) and between which is formed an intake gap (42). At least one of the counter-rotating rollers (40, 41) is driven so as to rotate about its counter-rotating axle (GA1, GA2) by a drive (43), the pair of counter-rotating rollers (40, 41) being disposed on a circumference (U) of the processing station (P) in such a manner and designed to induct the thin-walled packaging wrapper (10) into the intake gap (42). Moreover, the invention relates to a processing device having such an unpacking device 30, and to an unpacking method.

1 . An unpacking device ( 30 ) which is designed to remove a thin-walled packaging wrapper ( 10 ) from a workpiece ( 1 ),
 having a processing station (P) having a workpiece receptacle ( 31 ) for receiving the workpiece ( 1 ), and   having a pair of counter-rotating rollers ( 40 ,  41 ) which are mounted so as to be rotatable about counter-rotating axles (GA 1 , GA 2 ) and between which is formed an intake gap ( 42 ),
 at least one of the counter-rotating rollers ( 40 ,  41 ) being driven by a drive ( 43 ) so as to rotate about its counter-rotating axle (GA 1 , GA 2 ); and 
 the pair of counter-rotating rollers ( 40 ,  41 ) being disposed on a circumference (U) of the processing station (P) in such a manner and designed to draw the thin-walled packaging wrapper ( 10 ) into the intake gap ( 42 ). 
   
     
     
         2 . The unpacking device ( 30 ) as claimed in  claim 1 , wherein the workpiece receptacle ( 31 ) has at least three rollers ( 32 ,  33 ,  34 ,  35 ) which are disposed so as to be rotatable about roller axles (RA 1 , RA 2 , RA 3 , RA 4 ) and distributed about the circumference (U) of the processing station (P), and which are disposed in such a manner that a workpiece ( 1 ) between the rollers ( 32 ,  33 ,  34 ,  35 ) is rotatable on the processing station (P) by rotating the rollers ( 32 ,  33 ,  34 ,  35 ), at least one of the rollers ( 32 ,  33 ,  34 ,  35 ) being driven so as to rotate about its roller axle (RA 1 , RA 2 , RA 3 , RA 4 ) by a roller drive ( 36 ). 
     
     
         3 . The unpacking device ( 30 ) as claimed in  claim 2 , wherein the roller axles (RA 1 , RA 2 , RA 3 , RA 4 ) deviate by at most 15 degrees from a mutually parallel alignment. 
     
     
         4 . The unpacking device ( 30 ) as claimed in  claim 2 , wherein at least one of the rollers ( 32 ,  33 ,  34 ,  35 ) is displaceably mounted in such a manner that the size of the processing station (P) between the rollers ( 32 ,  33 ,  34 ,  35 ) is variable as a result. 
     
     
         5 . The unpacking device ( 30 ) as claimed in  claim 1 , wherein the counter-rotating axles (GA 1 , GA 2 ) deviate by at most 15 degrees from a mutually parallel alignment. 
     
     
         6 . The unpacking device ( 30 ) as claimed in  claim 2 , wherein the roller axles (RA 1 , RA 2 , RA 3 , RA 4 ) and the counter-rotating axles (GA 1 , GA 2 ) deviate by at most 15 degrees from a mutually parallel alignment. 
     
     
         7 . The unpacking device ( 30 ) as claimed in  claim 1 , wherein the intake gap ( 42 ) over its length has only substantially, at least substantially, or exactly the same width (B). 
     
     
         8 . The unpacking device ( 30 ) as claimed in  claim 1 , wherein the intake gap ( 42 ) has a width (B) which is actively adjustable by an adjustment drive ( 44 ), and/or wherein the counter-rotating rollers ( 40 ,  41 ) are loaded toward one another by a spring force of a spring. 
     
     
         9 . The unpacking device ( 30 ) as claimed in  claim 1 , wherein the processing station (P) has a bearing surface (F) on which the workpiece ( 1 ) is to be placed adjacent to the counter-rotating rollers ( 40 ,  41 ). 
     
     
         10 . The unpacking device ( 30 ) as claimed in  claim 1 , wherein said unpacking device ( 30 ) has a loading device which is designed to transport a workpiece ( 1 ) to the processing station (P) and/or remove said workpiece ( 1 ) from the processing station (P). 
     
     
         11 . A processing device ( 100 ) having an unpacking device ( 30 ) as claimed in  claim 1  and a processing machine ( 101 ), the unpacking device ( 30 ) being disposed along an automated conveyor line ( 90 ) in front of the processing machine ( 101 ), and unpacked workpieces ( 1 ) being transported by the conveyor line ( 90 ) from the unpacking device ( 30 ) to the processing machine ( 101 ), the processing machine ( 101 ) being from the following group: milling machine, turning machine, grinding machine, polishing machine, coating machine, cleaning machine, film-wrapping machine, and block-mounting machine. 
     
     
         12 . A method for removing a thin-walled packaging wrapper ( 10 ) from a workpiece ( 1 ), comprising the steps:
 a) offering up a workpiece ( 1 ) having a thin-walled packaging wrapper ( 10 ) to an intake gap ( 42 ) between a pair of counter-rotating rollers ( 40 ,  41 ) which are mounted so as to be rotatable about counter-rotating axles (GA 1 , GA 2 );   b) inducting the thin-walled packaging wrapper ( 10 ) so far into the intake gap ( 42 ) that the thin-walled packaging wrapper ( 10 ) is stripped from the workpiece ( 1 ).   
     
     
         13 . The method as claimed in  claim 12 , comprising the step:
 rotating the workpiece ( 1 ), by way of a workpiece circumference ( 5 ), transversely past the intake gap ( 42 ),
 either prior to gripping the thin-walled packaging wrapper ( 10 ) by way of the intake gap ( 42 ), in particular for increasing the probability that the thin-walled packaging wrapper ( 10 ) makes its way into the intake gap ( 42 ); and/or 
 when inducting the thin-walled packaging wrapper ( 10 ) into the intake gap ( 42 ), in particular for facilitating the stripping of the thin-walled packaging wrapper ( 10 ) from the workpiece ( 1 ). 
   
     
     
         14 . The method as claimed in  claim 13 , comprising the step:
 changing the direction of rotation of the workpiece ( 1 ),
 either prior to gripping the thin-walled packaging wrapper ( 10 ) by way of the intake gap ( 42 ), in particular for increasing the probability that the thin-walled packaging wrapper ( 10 ) makes its way into the intake gap ( 42 ); and/or 
 when inducting the thin-walled packaging wrapper ( 10 ) into the intake gap ( 42 ), in particular for facilitating the stripping of the thin-walled packaging wrapper ( 10 ). 
   
     
     
         15 . The method as claimed in  claim 13 , the workpiece ( 1 ) for rotation being disposed on a processing station (P) having a circumference (U), at least three rollers ( 32 ,  33 ,  34 ,  35 ) which are disposed so as to be rotatable about roller axles (RA 1 , RA 2 , RA 3 , RA 4 ) and distributed about the circumference (U) being disposed in such a manner that the workpiece ( 1 ) is clamped between the rollers ( 32 ,  33 ,  34 ,  35 ) on the processing station (P) and by rotation of the rollers ( 32 ,  33 ,  34 ,  35 ) is rotated on the processing station (P), to which end at least one of the rollers ( 32 ,  33 ,  34 ,  35 ) is driven so as to rotate about its roller axle (RA 1 , RA 2 , RA 3 , RA 4 ) by a roller drive ( 36 ). 
     
     
         16 . The method as claimed in  claim 12 , this method being carried out with an unpacking device ( 30 ), which is designed to remove a thin-walled packaging wrapper ( 10 ) from a workpiece ( 1 ), the unpacking device ( 30 ) comprising:
 a processing station (P) having a workpiece receptacle ( 31 ) for receiving the workpiece ( 1 ), and   a pair of counter-rotating rollers ( 40 ,  41 ) which are mounted so as to be rotatable about counter-rotating axles (GA 1 , GA 2 ) and between which is formed an intake gap ( 42 ),   at least one of the counter-rotating rollers ( 40 ,  41 ) being driven by a drive ( 43 ) so as to rotate about its counter-rotating axle (GA 1 , GA 2 ); and   the pair of counter-rotating rollers ( 40 ,  41 ) being disposed on a circumference (U) of the processing station (P) in such a manner and designed to draw the thin-walled packaging wrapper ( 10 ) into the intake gap ( 42 ).