Metal working – Plural diverse manufacturing apparatus including means for... – Type of machine
Patent
1992-06-05
1994-02-01
Terrell, William E.
Metal working
Plural diverse manufacturing apparatus including means for...
Type of machine
82120, 82124, B23B 904, B23B 1304
Patent
active
052823008
DESCRIPTION:
BRIEF SUMMARY
The machine in question is a bar turning lathe with a fixed poppet comprising a main spindle carrying a part to be machined, a first primary tool holder turret and a second primary tool holder turret. The first primary tool holder turret moves along two orthogonal axes, one of which is parallel to the axis of the main spindle and carries tools arranged to machine the aforementioned part held by the main spindle. The second primary tool holder turret moves along at least one axis parallel to that of the main spindle and carries tools set up to machine the aforementioned part held by the main spindle.
There are already a large number of lathes comprising a primary turret fitted with various tools to machine a part and a secondary turret holding at least one tool, generally a boring or drilling tool to machine this part simultaneously on its end face, in an axial direction.
To machine complex parts such as connectors and fittings which are profiled on both opposing faces, the parts have to be taken up again to undergo a second machining operation.
Such operations are a nuisance and a waste of time, adding to manufacturing costs.
If we consider previous publications describing similar systems, it is worth mentioning the German patent application DE-A-3 626 324 for a lathe with twin turrets and an auxiliary turret. However, in this case, the auxiliary turret is fixed and faces the primary turrets, which excludes any frontal arrangement or simultaneous machining of parts held by the retaking spindle.
This alternative design aims to overcome these drawbacks with a lathe capable of machining both opposiing faces of the part whilst keeping the frontal arrangement of both primary turrets, thus ensuring particulary easy access.
With this aim in mind, the lathe of this design is characterized by the fact that it comprises an auxiliary tool holder turret which moves along an axis parallel to that of the main spindle and is fitted to the second primary turret's support and by the fact that the second primary tool holder turret carries a retaking spindle arranged to pick up a part which is at least partially machined and previously carried by the main spindle. This retaking spindle is set up to present this partially machined part to at least one tool carried by the aforementioned auxiliary tool holder turret.
It is preferable that the retaking spindle be driven by a motor located on the second primary tool holder turret.
In a particularly advantageous arrangement, the first primary tool holder turret carries at least one tool for machining the part and one parting-off tool.
The second primary tool holder turret preferably carries at least one tool for machining the part to be machined carried by the main spindle.
The cutting tool carried by the second primary tool holder turret in preferably a fixed drilling or boring tool.
The auxiliary tool holder turret has the advantage of carrying at least one tool for machining the already partially machined part carried and rotated by the retaking spindle.
The cutting tool carried by the auxiliary tool holder turret is preferably a drilling or boring tool.
The auxiliary tool holder turret can rotate about an axis which is perpendicular to the main spindle axis.
The tool carried by the second primary tool holder turret and the tool carried by the auxiliary tool holder turret are arranged to work simultaneously on a part carried by the main spindle and a part carried by the retaking spindle respectively.
The cutting tool and the retaking spindle have the advantage of being carried by the second primary turret and are set out at an angle of 180.degree. relative to one another.
The second primary tool holder turret preferably carries an arm in which moves in an axial manner along an axis (T) parallel to the axis of the main spindle. This arm carries at least one cutting tool arranged to drill or bore a part rotated by the retaking spindle.
This concept will be better understood by referring to the description and drawings of a standard machining example in which:
FIG. 1 is a perspect
REFERENCES:
patent: Re33262 (1990-07-01), Link et al.
patent: 3821835 (1974-07-01), St. Andre et al.
patent: 4413539 (1983-11-01), Ishizuka et al.
patent: 4597155 (1986-07-01), Garnett et al.
patent: 4949443 (1990-08-01), Saruwatari et al.
Patent Abstracts of Japan, vol. 13, No. 20 (M-785) (3368), Jan. 18, 1989.
JP, A, 63229201 (Fujitsu Ltd), Sep. 26, 1988 see the whole document.
Gensbittel Francois
Girny Gerard
F.L.D. Machines Outils S.A.
Terrell William E.
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