Metal working – Plural diverse manufacturing apparatus including means for... – With turret mechanism
Patent
1991-11-20
1993-05-18
Briggs, William
Metal working
Plural diverse manufacturing apparatus including means for...
With turret mechanism
29 27R, 29 33J, B23B 1500
Patent
active
052109178
DESCRIPTION:
BRIEF SUMMARY
The present invention concerns a metal-working machine in particular for bar machining, comprising a first machining unit comprising a machining head and means for bringing and axially displacing the material to be machined, a principal turret with at least one machining station designed to machine the front surface of a part worked on by said machining head and a second machining unit designed to machine the back surface of said part.
Machines designed for complete machining of parts presently exist on the market, with machining taking place on the front surface, the back surface and along the peripheral surface of these parts. When the part is machined on the front surface and then cut, it is received by a device called a counter-spindle or counter-clamp, according to whether or not the piece is turning, which effects transfer of the part and positioning it across from the machining stations designed for machining the back surface.
In these machines the transfer element is designed to hold the part during cutting. In machines where the part is turning, only one transfer device is available, thereby preventing any other operation from taking place during this transfer phase. In machines where the piece is not turning, there may be two such devices, one of which holds the piece during cutting while the other moves the piece across from a machining station for machining the back surface. This increases output while permitting work on two parts simultaneously.
However, these existing machines have limited possibilities and do not allow more than two machining operations to take place simultaneously.
The present invention proposes to overcome these disadvantages by realizing a machine in which multiple machining operations occur simultaneously and which thereby enables a part to be produced in a fraction of the time previously required, since simultaneous machining of several parts is done at different machining stations. In effect, the machine according to the invention proposes combining the features of a conventional bar machining apparatus with those of a transfer unit, and thus realizes a unique, high performance machine.
This object is achieved by the machining unit according to the invention, characterized in that said principal turret is a revolving lathe-type turret and further comprises at least two receiving stations for parts worked on by said machining head and/or previously machined on their front surface, for simultaneously machining on their back surface while machining another part on said machining head and/or said machining station designed to machine the front surface of said other part.
According to an advantageous embodiment, said part receiving stations are axially movable.
Preferably, the second machining unit comprises several machining stations with axes parallel to the axis of the part and positioned so that the part receiving stations may be placed opposite these machining stations.
According to another embodiment, the machine may comprise a third machining unit with at least one machining station equipped with at least one tool perpendicular to the axis of the part, the tool on said third machining unit being rotatable and the machining station being axially movable in a direction perpendicular to the axis of the part.
In a particularly advantageous embodiment, the machine may comprise an auxiliary turret comprising at least one machining station, the turret being attached to a slide perpendicular to the axis of the part, the machining station being rotatable and axially movable in a direction parallel to the axis of the part.
In another embodiment, the machine may simultaneously comprise a principal turret and an auxiliary turret, these two turrets being attached to the same slide which is movable in a direction perpendicular to the axis of the part.
The present invention will be better understood with reference to the description of an exemplary embodiment and to the attached drawing, in which:
FIG. 1 is a schematic view of the machine according to the invention when the princip
REFERENCES:
patent: 3821835 (1974-07-01), Andre et al.
patent: 4597155 (1986-07-01), Garnett et al.
patent: 4608747 (1986-09-01), Link et al.
patent: 5031490 (1991-07-01), Grossmann
Piguet Pierre-Louis
Rossetti Hubert
Briggs William
Esco S.A.
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