Tangential grinding resistance measuring method and apparatus, and applications thereof to grinding condition decision and wheel life judgment
AssigneeJtekt Corporation
InventorsYasuhira Yamada, Hiroshi Morita
Life of this patent
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Abstract
A tangential grinding resistance measuring method includes obtaining an abrasive grain section area which is at a predetermined infeed depth from the highest top surface of abrasive grains on a grinding wheel; calculating the tangent of a half vertex angle of a conical model for cutting edges of the abrasive grains which model takes the abrasive grain section area as its bottom surface and the predetermined depth as its height; setting grinding parameters; and calculating a tangential grinding resistance from the grinding parameters and the tangent.
Claims16
A tangential grinding resistance measuring method for a grinding wheel in which a grinding wheel layer having abrasive grains bonded with a bond material is formed on a grinding surface, the resistance measuring method comprising:
- obtaining an abrasive grain section area of the grinding wheel which is at a predetermined depth from the highest top surface of a plurality of abrasive grains within a predetermined area on the grinding surface of the grinding wheel;
- assuming a conical model for cutting edges of the abrasive grains within the predetermined area, the conical model taking the abrasive grain section area as its bottom surface and the predetermined depth as its height, and of calculating a tangent of a half vertex angle which is half of a vertex angle of the conical model;
- setting grinding parameters;
- and
- calculating a tangential grinding resistance from the grinding parameters and the tangent.
A wheel life judgment method for a grinding wheel in which a grinding wheel layer having abrasive grains bonded with a bond material is formed on a grinding surface, the wheel life judgment method comprising:
- obtaining an abrasive grain section area of the grinding wheel which is at a predetermined depth from the highest top surface of a plurality of abrasive grains within a predetermined area on the grinding surface of the grinding wheel;
- and
- judging the wheel life of the grinding wheel by the comparison of the abrasive grain section area with a threshold value.
A tangential grinding resistance measuring apparatus for a grinding wheel in which a grinding wheel layer having abrasive grains bonded with a bond material is formed on a grinding surface, the resistance measuring apparatus comprising:
- section area obtaining means for obtaining an abrasive grain section area of the grinding wheel which is at a predetermined depth from the highest top surface of a plurality of abrasive grains within a predetermined area on the grinding surface of the grinding wheel;
- tangent calculation means for assuming a conical model for cutting edges of the abrasive grains within the predetermined area, the conical model taking the abrasive grain section area as its bottom surface and the predetermined depth as its height, and for calculating a tangent of a half vertex angle which is half of a vertex angle of the conical model;
- parameter setting means for setting grinding parameters;
- and
- tangential grinding resistance calculation means for calculating a tangential grinding resistance from the grinding parameters and the tangent.
A wheel life judgment apparatus for a grinding wheel in which a grinding wheel layer having abrasive grains bonded with a bond material is formed on a grinding surface, the wheel life judgment apparatus comprising:
- section area obtaining means for obtaining an abrasive grain section area of the grinding wheel which is at a predetermined depth from the highest top surface of a plurality of abrasive grains within a predetermined area on the grinding surface of the grinding wheel;
- and
- wheel life judgment means for judging the wheel life of the grinding wheel by the comparison of the abrasive grain section area with a threshold value.
Dependencies are inferred from the claim text.