Metal working – Plural diverse manufacturing apparatus including means for... – Type of machine
Reexamination Certificate
2001-12-18
2003-02-18
Briggs, William (Department: 3722)
Metal working
Plural diverse manufacturing apparatus including means for...
Type of machine
C408S234000, C409S202000, C409S212000, C409S235000, C483S016000
Reexamination Certificate
active
06519823
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a machine tool that enables to accelerate a feed speed for three-dimensional direction of a spindle and to improve machining precision with the first and the second saddles.
BACKGROUND OF THE INVENTION
A conventional machine tool has been already disclosed in a prior art reference, for example, the Japanese Patent Provisional Publication No. 365529 of 1992. As shown therein, the machine tool is defined by the column mounted fixedly onto a bed in the spindle direction, the first saddle guided on the column movably in vertical direction, the second saddle guided on the first saddle movably in lateral direction, and the spindle guided on the second saddle movably in the longitudinal direction.
The above first or second saddle is generally made of casting, and therefore the spindle head supported on these saddles sometimes vibrates to such an extent that affects machining precision in machining.
An object of this invention is to provide a machine tool that reasonably prevents vibrations of the spindle head and the like and enables a high-speed and a high-precision machining.
SUMMARY OF THE INVENTION
To achieve the above object, the invention is characterized by a machine tool having the following structure. That is, the machine tool comprises a bed, a column, a first saddle and a second saddle. The column forming a rectangular frame body making the central inside into a large space is mounted standingly onto one end of the bed so that the space is disposed on the front side. A pair of guide rails are mounted on the front surface of the column in vertical direction. On the other hand, the first saddle forming a square frame body whose upper and lower side members are made of prismatic members of rectangular cross-section, is movable to the vertical direction through the guide rails. A servomotor to drive laterally the following second saddle and a lateral screw axis combined with the servomotor are provided on the upper surface of the upper side member of the first saddle.
Besides, the second saddle is formed into a square frame body smaller in size than the first saddle and provided with a bulging member on the upper of the square frame body. The bulging member is screwed with the lateral screw axis so as to displace the second saddle in lateral direction. A pair of right and left square cylindrical members of rectangular cross-section are mounted on a lower rear surface of the square frame body in a specified length horizontal direction to cross at right angle to the rear surface. Besides, rail members are laid on the upper and lower prismatic bodies of the first saddle and the square cylindrical members of the second saddle. The invention is characterized by filling sealingly concrete into the prismatic bodies and a pair of right and left square cylindrical members provided with the guide rails.
REFERENCES:
patent: 3684395 (1972-08-01), Nurakami
patent: RE31288 (1983-06-01), Matsuzaki et al.
patent: 4679295 (1987-07-01), Lopez
patent: 5084951 (1992-02-01), Bonomi et al.
patent: 5346345 (1994-09-01), Jerzycke et al.
patent: 5379509 (1995-01-01), Mills et al.
patent: 5662568 (1997-09-01), Lindem
patent: 5758429 (1998-06-01), Farzan et al.
patent: 5846172 (1998-12-01), Ira
patent: 5988959 (1999-11-01), Sugata
patent: 6161995 (2000-12-01), Wakazono et al.
patent: 6246024 (2001-06-01), Hosaka
patent: 6447224 (2002-09-01), Mitsuzono et al.
patent: 57-54042 (1982-03-01), None
patent: 4-365529 (1992-12-01), None
patent: 10-122297 (1998-05-01), None
patent: 11-99424 (1999-04-01), None
patent: 11-216633 (1999-08-01), None
Seo Yoshihide
Sugata Shinsuke
Anderson Chad C.
Briggs William
Horkos Corp.
Shannon John P.
Venable
LandOfFree
Machine tool does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Machine tool, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Machine tool will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3149244