Grinding wheel dressing method and device

A grinding wheel dressing device comprising:

• a grinding wheel;
• a rotational shaft;
• rotating means for rotating the rotational shaft;
• a grinding wheel dresser mounted on the rotational shaft for rotation therewith and for dressing the grinding wheel;
• first moving means for moving the grinding wheel dresser in a first direction towards the grinding wheel;
• second moving means for moving the grinding wheel dresser in a second direction perpendicular to the first direction to bring corresponding surfaces of the grinding wheel dresser and the grinding wheel into contact with one another at respective contact positions;
• contact position detecting means for detecting the respective contact positions of the corresponding surfaces of the grinding wheel dresser and the grinding wheel;
• target position calculating means for calculating a target position of the grinding wheel dresser based on the contact positions detected by the contact position detecting means;
• and
• control means for controlling the movement of the second moving means to move the grinding wheel dresser to the target position calculated by the target position calculating means.

A grinding wheel dressing method, comprising the steps of:

• providing a grinding wheel having first and second grinding surfaces;
• providing a rotational grinding wheel dresser having first and second dressing surfaces and mounted for rotation about a rotational axis;
• disposing the grinding wheel dresser at a preselected position so that the first and second dressing surfaces of the grinding wheel dresser are in spaced-apart, confronting relation to the first and second grinding surfaces of the grinding wheel;
• moving the grinding wheel dresser in a first direction generally parallel to the rotational axis thereof to bring the first dressing surface of the grinding wheel dresser into contact with the first grinding surface of the grinding wheel at a first contact position;
• moving the grinding wheel dresser in a second direction opposite to the first direction to bring the second dressing surface of the grinding wheel dresser into contact with the second grinding surface of the grinding wheel at a second contact position;
• determining a target position for the grinding wheel dresser based on the first and second contact positions;
• moving the grinding wheel dresser to the target position;
• and
• moving the grinding wheel dresser toward the grinding wheel in a third direction generally perpendicular to the first and second directions while rotating the grinding wheel dresser to dress the first and second grinding surfaces of the grinding wheel by the first and second surfaces, respectively, of the grinding wheel dresser.

A dressing device comprising:

• a base;
• a grinding member having grinding surfaces;
• a dressing member having dressing surfaces for dressing the grinding member and mounted on the base for relative movement thereto;
• a first moving mechanism for moving the dressing member in a first direction toward the grinding member and a second direction away from the grinding member;
• a second moving mechanism for moving the dressing member in a third direction at an angle relative to the first direction and in a fourth direction opposite the third direction to bring corresponding surfaces of the dressing member and the grinding member into contact with one another at respective contact positions;
• a calculating device for calculating a target position for the dressing member based on the contact positions of the grinding surfaces of the grinding member and the dressing surfaces of the dressing member;
• and
• a control device for controlling movement of at least one of the first and second moving mechanisms to move the dressing member to a preselected position so that the dressing surfaces of the dressing member are in spaced-apart, confronting relation to the first and second grinding surfaces of the grinding member, controlling movement of the second moving mechanism to move the dressing member in the third and fourth directions to bring the corresponding surfaces of the dressing member and the grinding member into contact with one another at the respective contact positions, controlling movement of the first moving mechanism to move the dressing member in the second direction to the target position upon calculation thereof by the calculating device, and controlling movement of the first moving mechanism to move the dressing member in the first direction from the target position to perform dressing of the grinding surfaces of the grinding member by the dressing surfaces of the dressing member.