Belt grinder and attachment for grinding pipe ends

Abstract

The invention relates to a belt grinder, preferably used in combination with an attachment for the grinding of, for example, pipe ends characterized by the fact that a number of contact rolls having varying diameters around which the continuous belt is fitted as needed are made available and a device for adjustment of the belt tension that mechanically optimizes the tension of the grinding belt independently of the diameter of the contact roll is provided.

1 . Belt grinder ( 100 ), preferably in combination with an attachment ( 200 ) for the grinding of, for example, pipe ends characterized by the fact that a number of contact rolls ( 206 ) with varying diameters are made available for a belt grinder so the continuous belt can be fitted as desired around said contact rolls ( 206 ) and a device for adjustment of the belt tension is provided that mechanically optimizes the tension of the grinding belt independently of the diameter of the contact roll ( 206 ).  
   
   
       2 . Belt grinder ( 100 ) in accordance with  claim 1  characterized by the fact that the device for adjustment of the belt tension is fitted with a pneumatic spiral ( 130 ) one end ( 132 ) of which is secured in place while the other end ( 134 ) is displaceable in an elongated hole ( 136 ) in the belt grinder ( 100 ).  
   
   
       3 . Belt grinder ( 100 ) in accordance with  claim 1  characterized by the fact that the device for adjustment of the belt tension is fitted with a mechanical spiral, such as, a coil spiral.  
   
   
       4 . Belt grinder ( 100 ) in accordance with one of  claims 1  to  3  characterized by the fact that the device for adjustment of the belt tension is fitted with an eccentric part which is operated from the exterior of the belt grinder housing.  
   
   
       5 . Belt grinder ( 100 ) in accordance with one of  claims 1  to  4  characterized by the fact that the device for adjustment of the belt tension is fitted with a threaded spindle which is operated from the exterior of the belt grinder housing.  
   
   
       6 . Attachment ( 200 ) for securing to a belt grinder ( 100 ) in accordance with one of  claims 1  to  5  characterized by the fact that a collecting tank ( 204 ) that can be filled with a cooling medium collects the shavings.  
   
   
       7 . Attachment ( 200 ) for securing to the belt grinder ( 100 ) in accordance with one of  claims 1  to  6  characterized by the fact that a device for attachment to the belt grinder ( 100 ) is fitted with a mechanical fixing device for the relative fixing of the belt grinder housing ( 100 ) and the attachment ( 200 ).  
   
   
       8 . Attachment ( 200 ), preferably used for the grinding of, for example, pipe ends in combination with a belt grinder ( 100 ) characterized by the fact that a number of contact rolls ( 206 ) with varying diameters are made available around which the continuous belt can be fitted as desired and by the fact that a device for adjustment of the belt tension is provided that mechanically optimizes the tension of the grinding belt independently of the diameter of the contact roll.  
   
   
       9 . Attachment ( 200 ) in accordance with  claim 8  characterized by the fact that the device for adjustment of the belt tension is fitted with a pneumatic spring one end of which is secured in place while the other end is displaceable in an elongated hole in the attachment ( 200 ).  
   
   
       10 . Attachment ( 200 ) in accordance with  claim 8  characterized by the fact that the device for adjustment of the belt tension is fitted with a mechanical spring, for example, a coil spring.  
   
   
       11 . Attachment ( 200 ) in accordance with  claims 8  to  10  characterized by the fact that the device for adjustment of the belt tension has an eccentric part or a threaded spindle that is operated from the exterior of the belt grinder housing ( 100 ).  
   
   
       12 . Belt grinder ( 100 ) in accordance with one of  claims 1  to  5  characterized by the fact that the correct lateral position of the grinding belt and thus the uniform grinding belt tension on the running surface of the grinding belt is adjustable using a threaded spindle ( 104 ) that is fitted in a link plate on a motor flange ( 114 ).  
   
   
       13 . Belt grinder ( 100 ) in accordance with  claim 12  characterized by the fact that the motor flange ( 116 ) can be mounted in two positions and the threaded spindle ( 104 ) in one mode is positioned behind the motor ( 102 ) and in another mode in front of the motor ( 102 ) which permits mutually complementary adjustment possibilities.  
   
   
       14 . Belt grinder ( 100 ) in accordance with  claim 13  characterized by the fact that the adjustment using the threaded spindle ( 104 ) in its position behind the motor ( 102 ) is realized by exerting pressure on the cover plate while the adjustment using the threaded spindle ( 104 ) in its position in front of the motor ( 102 ) is realized by pulling the cover plate to thereby extend the bandwidth of adjustment possibilities due to the eccentric part of the spiral.