Back to results
US 4,375,738 AGranted
Method for grinding glass plate and the like by numerical control and grinding machine therefor
AssigneeBando Kiko Co., Ltd.
InventorShigeru Bando
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeBando Kiko Co., Ltd.
InventorShigeru Bando
Estimating the term…
A grinding machine having a table provided with a plurality of fixing stands in tandem for fixing glass plates and a head stand carrying working heads equipped with working wheels rotatably in the same number as the fixing stands comprises means for causing the table and the working heads to conduct a relative movement in two directions in a horizontal plane, means for orbitting the working wheels around vertical axes. The relative movement of the table and the working heads in the two directions and the orbitting movement of the working wheels around the vertical axes in the machine are controlled by a numerical control device in which the face of the glass plates to be ground and the grinding face of the grinding wheels are always kept at substantially a same contact angle.
A method of grinding end portions of glass plates by numerical control comprising:
A grinding machine for glass plates comprising:
A grinding machine for glass plates comprising a table having a plurality of fixing stands for fixing the glass plates, a head stand carrying a pluralty of working heads each having a respective rotatably mounted working wheel, means for causing relative movement of the head stand and fixing stands in one direction in a plane so as to move a plurality of working wheels in one direction in the plane relative to glass plates to be worked, means for causing relative movement of the head stand and fixing stands in the direction perpendicular to the above one direction in the plane so as to cause a plurality of working wheels to conduct a movement in the direction perpendicular to the above one direction in the plane relative to glass plates to be worked, a plurality of means mounted on the above head stand for driving the respective working wheels, provided inclined from a vertical axis, of a number of working heads excluding at least one of the working heads, to orbit vertical axes, and a numerical control device for controlling the movements in the biaxial directions in the plane of the working wheels and the orbitting movement around the vertical axes of the inclined working wheels, each driving means being provided with a rod rotatably mounted by a bearing device, said rod being provided with said working head, the portion of each of the rods projecting from the bearing devices being so connected to each other by transmission means and also to driving means that each rod receives the same movement, the centre of orbitting of each of the inclined working wheels being situated so as to go through the working point and also to align with the centre of said rod.
A grinding machine for glass plates comprising:
A grinding machine for glass plates comprising a table having a plurality of fixing stands for fixing the glass plates, a head stand carrying a plurality of working heads each having a respective rotatably mounted working wheel, means causing relative movement of the head stand and fixing stands in one direction in a plane so as to move a plurality of working wheels in one direction in the plane relative to glass plates to be worked, means for causing relative movement of the head stand and fixing stands in the direction perpendicular to the above one direction in the plane so as to cause a plurality of working wheel to conduct a movement in the direction perpendicular to the above one direction in the plane relative to glass plates to be worked, a plurality of means mounted on the above head stand for driving each of the working wheels to orbit a respective vertical axis, means for shifting the rotating centre of each working wheel with respect to its centre of orbitting, and a numerical control device for controlling the movements in the biaxial directions in the plane of the working wheels and the orbitting movements of the working wheels, each said means for driving working wheels carried by said head stand being provided with a rod rotatably mounted by a bearing device, said rod being provided with said working head, the portion of each of the rods being so connected to each other by transmission means and also to driving means that each rod receives the same movement, the centre of orbitting of each of said working wheel being situated so as to go through the working point and also to align with the centre of said rod.
A grinding machine for end portions of a glass plate, comprising a table having a fixing stand for fixing the glass plate, a head stand carrying a working head having a working wheel, means for causing relative movement of the head stand and the fixing stand in a first direction in a plane so as to move the working wheel in the first direction in the plane relative to the glass plate to be worked, means for causing relative movement of the head stand and the fixing stand in a second direction which is perpendicular to the first direction in the plane so as to move the working wheel in the second direction in the plane relative to the glass plate to be worked, and a numerical control device controlling said two means, characterized in that the working head is mounted on an arm at a predetermined angle, one end of the arm fixed to a rod, the rod rotatably mounted on the head stand, and that said machine further comprises mans mounted on the head stand for causing the working wheel to undergo orbiting motion around the axis of the rod, said axis being perpendicular to the plane, and that the numerical control device controls the orbiting motion of said means.
A grinding machine for end portions of a glass plates, comprising a table having a plurality of fixing stands for fixing the glass plates, a head stand carrying a plurality of working heads each having a respectively rotatably mounted working wheel, means for causing relative movement of the head stand and the fixing stands in a first direction in a plane so as to move a plurality of the working wheels in the first direction in the plane relative to the glass plates to be worked, means for causing relative movement of the head stand and the fixing stands in a second direction which is perpendicular to the first direction in the plane so as to cause a plurality of the working wheels to conduct a movement in the second direction relative to the glass plates to be worked, and a numerical control device controlling said two means, characterized in that each working head is mounted on an arm at a predetermined angle, one end of the arm fixed to a rod, the rod rotatably mounted on the head stand, and that said machine further comprises means mounted on the head stand for causing the working wheels to undergo orbiting motion around the axis of the rod, said axis being perpendicular to the plane, and that the numerical control device controls the orbiting motion of said means.
Dependencies are inferred from the claim text.