Rotary Diamond Dresser

Abstract

A rotary diamond dresser, with a V-groove circumferentially formed around a heavily abraded high load part of the circumference of a circular dressing body. A plurality of octahedral diamond grains are sequentially set along the V-groove of the circular dressing body such that the oriented crystal surfaces of each diamond grain are bonded to the respective surfaces of the V-groove. A plurality of small-sized diamond grains, other than the octahedral diamond grains, are secured to the surface of the circumference of the dressing body, other than the high load part. The oriented crystal surfaces of the octahedral diamond grains and the small-sized diamond grains are formed to make respective contact surfaces that contact and dress a grinding wheel. Thus, the rotary diamond dresser, which is easily produced, has excellent abrasion resistance, and is low-priced.

1 . A rotary diamond dresser comprising a circular dressing body rotated around a rotary axis, with a plurality of diamond grains set into a circumference of the circular dressing body, thus dressing a grinding wheel, wherein: 
 a V-groove is formed along a high load part of the circular dressing body such that two surfaces of the V-groove are oriented in a rotating direction of the circular dressing body and are divergent from each other at an angle equal to an angle defined between two oriented crystal surfaces (1,1,1) that meet each other to form a ridge on an oriented crystal surface (1,1,0) of an octahedral diamond grain, the high load part being defined along the circumference of the circular dressing body and being heavily loaded during dressing, thus highly abrading the diamond grains;    a plurality of octahedral diamond grains are set along the V-groove such that the two oriented crystal surfaces (1,1,1) of each of the octahedral diamond grains are bonded to the two respective surfaces of the V-groove using a bonding material, and the oriented crystal surface (1,1,0) of each of the octahedral diamond grains is formed as a contact surface that contacts and dresses the grinding wheel;    a plurality of small-sized diamond grains other than the octahedral diamond grains are secured using the bonding material to a surface of the circumference of the circular dressing body other than the high load part; and    each of the small-sized diamond grains is formed to make a contact surface that contacts and dresses the grinding wheel.    
   
   
       2 . A rotary diamond dresser comprising a circular dressing body rotated around a rotary axis, with a plurality of diamond grains set into a circumference of the circular dressing body, thus dressing a grinding wheel, wherein: 
 a V-groove is formed along a high load part of the circular dressing body such that two surfaces of the V-groove are oriented in a rotating direction of the circular dressing body, or in a direction perpendicular to the rotating direction, and contact two opposite surfaces of four oriented crystal surfaces (1,1,1) of an octahedral diamond grain, which form vertices on oriented crystal surfaces (1,0,0), the high load part being defined along the circumference of the circular dressing body and being heavily loaded during dressing, thus highly abrading the diamond grains;    a plurality of octahedral diamond grains are set along the V-groove such that the two oriented crystal surfaces (1,1,1) of each of the octahedral diamond grains are bonded to the two respective surfaces of the V-groove using a bonding material, and the oriented crystal surface (1,0,0) of each of the octahedral diamond grains is formed as a contact surface that contacts and dresses the grinding wheel;    a plurality of small-sized diamond grains other than the octahedral diamond grains are secured using the bonding material to a surface of the circumference of the circular dressing body other than the high load part; and    each of the small-sized diamond grains is formed to make a contact surface that contacts and dresses the grinding wheel.    
   
   
       3 . The rotary diamond dresser according to  claim 1 , wherein the V-groove is continuously and circumferentially formed along the high load part, which is a junction part between a circumferential straight part and a side arcuate part of the circumference of the circular dressing body.  
   
   
       4 . A cup-type rotary diamond dresser comprising a circular truncated conical dressing body rotated around a rotary axis thereof, with a plurality of diamond grains inclinedly protruding outwards from a circumference of a large-diameter part of the circular truncated conical dressing body at a predetermined inclination angle relative to the rotary axis of the dressing body, or a conical-type rotary diamond dresser comprising a circular double-sided truncated conical dressing body rotated around a rotary axis thereof, with a plurality of diamond grains protruding outwards from a middle part of a circumference of the circular double-sided truncated conical dressing body in a direction perpendicular to the rotary axis of the dressing body, wherein: 
 a V-groove having two surfaces, which contact two opposite surfaces of four oriented crystal surfaces (1,1,1) of an octahedral diamond grain, which form vertices on oriented crystal surfaces (1,0,0), is formed around the circumference of the large-diameter part of the circular truncated conical dressing body such that a center line of the V-groove is inclined outwards relative to the rotary axis of the dressing body, or is formed around the middle part of the circumference of the circular double-sided truncated conical dressing body such that a center line of the V-groove is perpendicular to the rotary axis of the dressing body, the two surfaces of the V-groove being oriented in a rotating direction of the dressing body or in a direction perpendicular to the rotating direction;    a plurality of octahedral diamond grains are set along the V-groove such that the two oriented crystal surfaces (1,1,1) of each of the octahedral diamond grains are bonded to the two respective surfaces of the V-groove using a bonding material;    an angle between the surfaces of each of the octahedral diamond grains, which protrude from the V-groove, is formed as an acute angle; and    the oriented crystal surface (1,0,0) of each of the octahedral diamond grains is formed as a contact surface that contacts and dresses a grinding wheel.    
   
   
       5 . A cup-type rotary diamond dresser comprising a circular truncated conical dressing body rotated around a rotary axis, with a plurality of diamond grains inclinedly protruding outwards from a circumference of a large-diameter part of the circular truncated conical dressing body at a predetermined inclination angle relative to the rotary axis of the dressing body, or a conical-type rotary diamond dresser comprising a circular double-sided truncated conical dressing body rotated around a rotary axis, with a plurality of diamond grains protruding outwards from a middle part of a circumference of the circular double-sided truncated conical dressing body in a direction perpendicular to the rotary axis of the dressing body, wherein: 
 a V-groove having two surfaces, which are divergent from each other at an angle equal to an angle defined between two oriented crystal surfaces (1,1,1) that meet each other to form a ridge on an oriented crystal surface (1,1,0) of an octahedral diamond grain, is formed around the circumference of the large-diameter part of the circular truncated conical dressing body such that a center line of the V-groove is inclined outwards relative to the rotary axis of the dressing body, or is formed around the middle part of the circumference of the circular double-sided truncated conical dressing body such that a center line of the V-groove is perpendicular to the rotary axis of the dressing body;    a plurality of octahedral diamond grains are set along the V-groove such that the two oriented crystal surfaces (1,1,1) of each of the octahedral diamond grains are bonded to the two respective surfaces of the V-groove using a bonding material;    an angle between the surfaces of each of the octahedral diamond grains, which protrude from the V-groove, is formed as the angle defined between two oriented crystal surfaces (1,1,1);    the oriented crystal surface (1,1,0) of each of the octahedral diamond grains is formed as a contact surface that contacts and dresses a grinding wheel.    
   
   
       6 . The rotary diamond dresser according to  claim 1 , wherein the bonding material for bonding the octahedral diamond grains to the surface of the V-groove is solder made of an alloy of metal selected from one Group among Group 4A including titanium (Ti), Group 5A including vanadium (V), and Group 6A including chromium (Cr) of the Periodic Table, and metal selected from Group 1B of the Periodic Table.  
   
   
       7 . The rotary diamond dresser according to  claim 2 , wherein the V-groove is continuously and circumferentially formed along the high load part, which is a junction part between a circumferential straight part and a side arcuate part of the circumference of the circular dressing body.  
   
   
       8 . The rotary diamond dresser according to  claim 2 , wherein the bonding material for bonding the octahedral diamond grains to the surface of the V-groove is solder made of an alloy of metal selected from one Group among Group 4A including titanium (Ti), Group 5A including vanadium (V), and Group 6A including chromium (Cr) of the Periodic Table, and metal selected from Group 1B of the Periodic Table.  
   
   
       9 . The rotary diamond dresser according to  claim 3 , wherein the bonding material for bonding the octahedral diamond grains to the surface of the V-groove is solder made of an alloy of metal selected from one Group among Group 4A including titanium (Ti), Group 5A including vanadium (V), and Group 6A including chromium (Cr) of the Periodic Table, and metal selected from Group 1B of the Periodic Table.  
   
   
       10 . The rotary diamond dresser according to  claim 4 , wherein the bonding material for bonding the octahedral diamond grains to the surface of the V-groove is solder made of an alloy of metal selected from one Group among Group 4A including titanium (Ti), Group 5A including vanadium (V), and Group 6A including chromium (Cr) of the Periodic Table, and metal selected from Group 1B of the Periodic Table.  
   
   
       11 . The rotary diamond dresser according to  claim 5 , wherein the bonding material for bonding the octahedral diamond grains to the surface of the V-groove is solder made of an alloy of metal selected from one Group among Group 4A including titanium (Ti), Group 5A including vanadium (V), and Group 6A including chromium (Cr) of the Periodic Table, and metal selected from Group 1B of the Periodic Table.