Dresser feeding device

Abstract

A dresser supply device of a grinding tool which supplies powdery dresser to a grinding tool having an abrasive grain layer on cutting blade tips, the dresser supply device comprising: an air supply source which supplies air; a dresser supply air pipe including a base end which is connected to the air supply source; a dresser tank which holds the dresser; a dresser supply pipe which connects the dresser tank and the dresser supply air pipe to each other, is smaller in diameter than the dresser supply air pipe at a connecting portion with the dresser supply air pipe, has a first tip inserted and projecting into the dresser supply air pipe, and is located at a space from an inner peripheral surface of the dresser supply air pipe; and an opening-and-closing valve which is provided in the dresser supply air pipe between the connecting portion and the air supply source side.

1 . A dresser supply device of a grinding tool which supplies powdery dresser to a grinding tool having an abrasive grain layer on cutting blade tips, the dresser supply device comprising:
 an air supply source which supplies air;   a dresser supply air pipe including a base end which is connected to the air supply source;   a dresser tank which holds the dresser;   a dresser supply pipe which connects the dresser tank and the dresser supply air pipe to each other, is smaller in diameter than the dresser supply air pipe at a connecting portion with the dresser supply air pipe, has a first tip inserted and projecting into the dresser supply air pipe, and is located at a space from an inner peripheral surface of the dresser supply air pipe; and   an opening-and-closing valve which is provided in the dresser supply air pipe between the connecting portion and the air supply source side.   
   
   
       2 . The dresser supply device according to  claim 1 , further comprising a control unit which allows the opening-and-closing valve to be opened and closed intermittently. 
   
   
       3 . The dresser supply device according to  claim 1 ,
 wherein the gap between the first tip of the dresser supply pipe and the inner peripheral surface of the dresser supply air pipe is adjustable.   
   
   
       4 . The dresser supply device according to  claim 1 , further comprising an air supply pipe provided with a pressure control valve which connects:
 the region of the dresser supply air pipe between the opening-and-closing valve and the air supply source; and   the region of the dresser supply air pipe between the connecting portion and a second tip on the side of the grinding tool.   
   
   
       5 . The dresser supply device according to  claim 4 ,
 wherein a dresser tank connecting tube is communicated with:   a portion between the connecting portion of the dresser supply air pipe and the second tip of the dresser supply air pipe; and   the inside of the dresser tank.   
   
   
       6 . The dresser supply device according to  claim 5 ,
 wherein a downstream connecting portion of the dresser supply air pipe and the air supply pipe downstream is located on the downstream side of a connecting portion between the dresser tank connecting tube and the dresser supply air pipe.