Machine tool

Details Machine tool Machine tool

2011-08-16

2011-08-16

Siconolfi, Robert (Department: 3657)

Lubrication

Systems

With means to control machine operation

C184S006140, C184S006180, C184S006220, C184S006260, C184S006300, C184S007400, C184S104100, C409S056000, C409S135000, C409S136000, C409S231000, C415S111000, C415S112000, C384S466000, C384S474000, C384S476000, C073S114550, C073S114560

Reexamination Certificate

active

07997385

ABSTRACT:
The present invention is to provide a machine tool in which appropriate warm-up operation can be performed. Unnecessary warm-up operation before machining is not carried out and damage of bearings caused by the warm-up operation is prevented. A controlling unit stores data of a supply amount of lubricant to bearings and a rotation speed of a main spindle in a memory unit as time-series data. When rotation of the main spindle is started, the time-series data stored in the memory unit is used to calculate an amount of remaining lubricant in the bearings and determination of necessity of warm-up operation is made based upon the stored data. A rotation speed at a start-up time of the main spindle is controlled according to the determination result.

REFERENCES:
patent: 4514123 (1985-04-01), Johnstone et al.
patent: 4890695 (1990-01-01), Morris et al.
patent: 5526783 (1996-06-01), Ito et al.
patent: 2004/0098233 (2004-05-01), Renner
patent: 2006-007329 (2006-01-01), None
patent: WO 2005092565 (2005-10-01), None

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