Gear cutting – milling – or planing – Milling – With means to remove chip
Reexamination Certificate
1999-04-14
2001-04-03
Howell, Daniel W. (Department: 3722)
Gear cutting, milling, or planing
Milling
With means to remove chip
C408S067000
Reexamination Certificate
active
06210086
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to machine tools, and is directed more particularly at a device which makes it possible to remove and evacuate the chips formed and ejected during machining of a part.
2. Discussion of the Background
In classical equipment, the chips formed during machining of a part are flushed from the zone of the cutting tool by liquid jets emerging from directional nozzles disposed nearby and oriented toward the tool and the tool holder. The chips drawn along by the liquid are then collected together therewith in an evacuation housing disposed in the lower part of the machine tool.
Nevertheless, such devices suffer from the drawback of allowing the chips to accumulate in the form of agglomerate in the multiple ejection zones not sprayed by the liquid jets. These agglomerates are particularly heavy during high-speed machining of materials such as aluminum-base materials, for which the chips, which are of small size, are ejected into the entire space surrounding the tool and the part to be machined. Agglomerates of chips hardened and stuck to the surrounding walls then break off randomly and interfere with machining of the part in progress, making it necessary to stop and clean the machine tool.
One known technique for overcoming this drawback is to increase the number of liquid-atomizing nozzles and to orient the nozzles toward the points of heaviest accumulation of chips.
This solution involves a greater number of liquid-supply tubes and an increase in space requirement and weight of the device, with all the associated drawbacks when the said device must be fixed on removable hoods for maintenance operations. Furthermore, the greater number of liquid-atomizing nozzles leads to an increase of liquid consumption and achieves merely a shift in the chip-accumulation zones, which still become grouped behind the nozzles.
SUMMARY OF THE INVENTION
The object of the present invention is therefore to remove the chips ejected by a machine tool by means of a device which requires little space, is simple to install without the possibility of loss of adjustment, is economical as regards liquid consumption, is effective within a large radius of action and can be manufactured simply and economically.
The device according to the invention for removal of chips ejected by the machining head of a machine tool comprises at least one pressurized-liquid delivery line connected to distributor means suitable for spraying the machine tool in order to draw the chips together with the liquid toward an evacuation outlet.
According to the invention, the device for removal of chips ejected by the machining head of a machine tool is characterized in that the distributor means are achieved by at least one nozzle of multidirectional type capable of atomizing the liquid throughout an appropriate spraying volume, said volume comprising the main zones of deposition of ejected chips.
According to another characteristic of the invention, the multidirectional nozzle is provided with a head having orifices which atomize substantially straight liquid jets, the head being mounted movably in such a way that the jets periodically sweep over the entirety of the volume.
According to another characteristic of the invention, the multidirectional nozzle is provided with a rotary head.
According to another characteristic of the invention, the rotary head is of the automatically turning type, wherein the torque generated by atomization of the liquid drives the head in rotation.
According to yet another characteristic of the invention, the rotary head has spherical shape and is provided with multiple tangentially oriented orifices.
According to another characteristic of the invention, the rotary head is of the whirling type.
According to another characteristic of the invention, the multidirectional nozzle is disposed in such a way that it directly sprays the tool under a favorable angle.
According to another characteristic of the invention, the machining head of the machine tool as well as the part and the multidirectional nozzle are disposed in the same closed enclosure.
According to another characteristic of the invention, the machine tool is a high-speed machining machine with high feed speeds.
According to another characteristic of the invention, the pressurized liquid is a soluble oil which is atomized by the multidirectional nozzle throughout the duration of machining.
REFERENCES:
patent: 3054411 (1962-09-01), Randall
patent: 3601136 (1971-08-01), Marcham
patent: 3645791 (1972-02-01), Sadwith
patent: 4082057 (1978-04-01), Hayes
patent: 4185376 (1980-01-01), Johnstone
patent: 4244524 (1981-01-01), Wellings
patent: 4322992 (1982-04-01), Remillard et al.
patent: 4778315 (1988-10-01), Duffy et al.
patent: 4893642 (1990-01-01), Parslow, Jr. et al.
patent: 4989785 (1991-02-01), Walendowski
patent: 5205686 (1993-04-01), De Caussin
patent: 5678466 (1997-10-01), Wahl
patent: 5683210 (1997-11-01), Phillips et al.
Lecornet Alain
Lokietek Bernard
Meunier Jean-Michel
Rocher Jean-Paul
Howell Daniel W.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Renault
LandOfFree
Device for removing chips produced by the machining head of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device for removing chips produced by the machining head of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for removing chips produced by the machining head of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2475726