Polishing method for inner surface of tubular brittle material and tubular brittle material obtained by polishing method
An object of the present invention is to provide a polishing method for producing, in a relatively short period of time, a tubular brittle material having an inner surface of high surface precision with a maximum roughness R max of 0.1 μm or smaller and a center line average roughness R a of 0.01 μm or smaller, and to provide a tubular brittle material with high precision using said polishing method. The polishing method according to the invention is characterized by that the inner surface of the tubular material being pre-cut into a tubular shape using a honing machine is further polished with a sheet material having diamond abrasives attached thereon. Also claimed is a tubular brittle material obtained by said polishing method.
1. A method for polishing an inner surface of a tubular brittle material at high surface precision, said method comprising: subjecting the inner surface to a preliminary grinding treatment using a honing machine which is equipped with a polishing head, and after that polishing the inner surface with a sheet material having diamond abrasives attached thereon.
2. The polishing method as claimed in claim 1 , wherein the sheet material having diamond abrasives attached thereon is wound around the polishing head of the honing machine.
3. The polishing method as claimed in claim 2 , wherein the sheet material having diamond abrasives attached thereon is fixed to the polishing head by a hook and loop fastener.
4. The polishing method as claimed in claim 1 , wherein the diamond abrasives have a grain diameter in the range of from #500 to #10000.
5. The polishing method as claimed in claim 1 , wherein the diamond abrasives are attached on a surface of the sheet material which is knobbed or corrugated.
6. The polishing method as claimed in claim 2 , wherein the diamond abrasives have a grain diameter in the range of from #500 to #10000.
7. The polishing method as claimed in claim 3 , wherein the diamond abrasives have a grain diameter in the range of from #500 to #10000.
8. The polishing method as claimed in claim 2 , wherein the diamond abrasives are attached on a surface of the sheet material which is knobbed or corrugated.
9. The polishing method as claimed in claim 3 , wherein the diamond abrasives are attached on a surface of the sheet material which is knobbed or corrugated.
10. The polishing method as claimed in claim 4 , wherein the diamond abrasives are attached on a surface of the sheet material which is knobbed or corrugated.