Apparatus for processing surface of workpiece

An apparatus for processing the surface of a workpiece, the apparatus comprising:

• a first rotating body connected to a first rotating shaft and comprising a first protruding portion connected to a part of an outer circumference thereof;
• a second rotating body connected to a second rotating shaft and comprising a second protruding portion connected to a part of an outer circumference thereof;
• and
• a third rotating body connected to a third rotating shaft and comprising a third protruding portion connected to a part of an outer circumference thereof,
• wherein the first to third rotating shafts are in the same plane,
• a first angle between the first and second rotating shafts, a second angle between the first and third rotating shafts, and a third angle between the second and third rotating shafts are identical,
• a recess is formed on the outer circumferences of the first to third rotating bodies, respectively,
• the recesses of the first to third rotating bodies are disposed adjacently to one another and form together a pathway through which a workpiece can pass,
• the size of the pathway is adjusted by moving the first rotating body,
• the first to third protruding portions are positioned within the recesses of the first to third rotating bodies and come into contact with an outer circumference of the workpiece in the recess, and
• there is a gap between the workpiece and the pathway when the workpiece passes through the pathway.