Oilstone centre used for hydraulic turbine needle abrasive machining

The present invention discloses one kind of oilstone spike for grinding the nozzle needle of the water turbine. The oilstone spike includes a spike seat, a spike fixed to the spike seat and a outer jacket around the spike with oil returning gap in between. The spike has a conic angle of 60 deg in th...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	YAOMING LUO
Format:	Patent
Sprache:	eng
Schlagworte:	DRESSING OR CONDITIONING OF ABRADING SURFACES FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS GRINDING MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING PERFORMING OPERATIONS POLISHING TRANSPORTING
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Beschreibung
Zusammenfassung:	The present invention discloses one kind of oilstone spike for grinding the nozzle needle of the water turbine. The oilstone spike includes a spike seat, a spike fixed to the spike seat and a outer jacket around the spike with oil returning gap in between. The spike has a conic angle of 60 deg in the top. The present invention can grind central holes of nozzle needle with high roundness, high surface roughness and high concentricity, and is favorable to raising the machining precision of the nozzle needle.