End face grinding method and end face grinding device
The end face grinding method includes a structure rotating step of rotating a honeycomb structure based on a rotation axis in a direction orthogonal to the end face of the honeycomb structure, a grinding wheel reverse rotating step of using a grinding wheel disposed so that a grinding surface faces the end face and rotating the grinding wheel in a reverse rotating direction to a rotating direction of the honeycomb structure based on a rotation axis in the direction orthogonal to the end face; and a dry type grinding step of bringing the grinding wheel rotating in the reverse direction close to the rotating honeycomb structure to perform the dry type grinding of the end face.
1. An end face grinding method to perform dry type grinding of an end face of a ceramic honeycomb structure, comprising:
a structure rotating step of rotating the honeycomb structure in a first rotational direction based on a rotation axis in a direction orthogonal to the end face;
a grinding wheel reverse rotating step of using a grinding wheel disposed so that a grinding surface faces the end face and rotating the grinding wheel in a second rotational direction opposite the first rotational direction of the honeycomb structure based on a rotation axis in the direction orthogonal to the end face; and
a dry type grinding step of bringing the grinding wheel rotating in the second rotational direction close to the rotating honeycomb structure to perform the dry type grinding of the end face;
wherein one of the first rotational direction and the second rotational direction is a counter-clockwise direction.
2. The end face grinding method according to claim 1 , further comprising:
a dust collecting step of sucking, from the side of the grinding surface of the grinding wheel, ground powder of the honeycomb structure which is generated by the dry type grinding step to collect dust.
3. The end face grinding method according to claim 2 ,
wherein in the grinding wheel reverse rotating step, a hollow tubular spindle to rotate the grinding wheel is used, and
in the dust collecting step, the ground powder is sucked from one end of the spindle which is opened to the grinding surface.
4. The end face grinding method according to claim 1 ,
wherein the honeycomb structure comprises a plurality of polygonal cells defined by latticed cell partition walls, and
a relation between a grinding wheel feeding speed Y (mm/min) of the grinding wheel to the honeycomb structure in the dry type grinding step and a partition wall thickness X (mm) of the cell partition walls satisfies conditions of Y≤114.7X−1.78.
5. The end face grinding method according to claim 1 ,
wherein a peripheral speed of the grinding wheel in the grinding wheel reverse rotating step is 35 m/s or more.
6. The end face grinding method according to claim 1 ,
wherein a rotating speed of the honeycomb structure in the structure rotating step is 50 rpm or more and 600 rpm or less.
7. The end face grinding method according to claim 1 ,
wherein a grinding depth of the end face of the honeycomb structure in the dry type grinding step is from 0.5 to 1.0 mm.
8. An end face grinding device to perform dry type grinding of an end face of a ceramic honeycomb structure by use of the end face grinding method according to claim 1 , comprising:
a structure rotating mechanism section which has a rotating portion comprising a structure holding portion holding the honeycomb structure and which rotates the honeycomb structure based on a rotation axis in the first rotational direction orthogonal to the end face;
a grinding wheel reverse rotating mechanism section which has a grinding wheel supporting portion supporting a grinding wheel whose grinding surface is disposed to face the end face and which rotates the grinding wheel in the second rotational direction opposite to the first rotational direction of the honeycomb structure based on a rotation axis in a direction orthogonal to the end face and the grinding surface; and
a dry type grinding mechanism section which brings the grinding wheel rotating in the second rotational direction close to the rotating honeycomb structure to perform the dry type grinding step of the end face,
wherein one of the first rotational direction and the second rotational direction is a counter-clockwise direction.
9. The end face grinding device according to claim 8 , further comprising:
a dust collecting mechanism section which sucks, from the side of the grinding surface, ground powder of the honeycomb structure which is generated by the dry type grinding of the end face, to collect dust.
10. The end face grinding device according to claim 9 ,
wherein the grinding wheel reverse rotating mechanism section further comprises a hollow tubular spindle connected to the grinding wheel supporting portion to rotate the grinding wheel, and
the dust collecting mechanism section sucks the ground powder from one end of the spindle which is opened to the grinding surface side, to collect the dust.