US3828649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Milling heads
Assignee: Peugeot & Renault
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Filing: 1972-10-26
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Granted: 1974-08-13
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Expires: 1992-10-26
Abstract
Abstract This milling head intended for machining complex evolutive surfaces in easily machinable materials for manufacturing mockups and patterns comprises a tool holder spindle having its axis adapted to pivot about a first axis inclined to the spindle axis and converging therewith to the tool point, said spindle pivot axis pivoting in turn about the second pivot axis while forming therewith the same angle as with the spindle axis, said first and second pivot axes being also coincident at a point corresponding to the tool point, said second axis being rigid with the frame structure supporting the milling head and being subjected to three movements along the conventional reference axes X, Y and Z of the machine. Thus, the tool holder spindle can swivel in all directions about the tool point.
Inventors
- 👤 P Lecailtel
- 👤 B Dressler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:02
CPC Classifications
B; B23; B23Q; B23Q1/00; B23Q1/0009; B23Q1/25; B23Q1/44; B23Q1/50; B23Q1/54; B23Q11/00; B23Q11/0042; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/304088; Y10T409/306664; Y10T409/307672; Y10T409/30784; Y10T409/308512; Y10T409/309296
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
289 words
Milling head for digit control machine adapted to machine evolutive surfaces comprising a tool holder spindle having an axis of rotation and adapted to engage a tool having an extending point, a carrier device for swivelling and retracting said tool holder spindle as a function of the surfaces to be machined, said carrier having first spindle means adapted to pivot said tool holder spindle about a first pivot axis set at 45* to said spindle axis, said carrier having second spindle means to pivot said first pivot axis about a second pivot axis which is at 45* to said first pivot axis, said first and second pivot axes intersecting at a point corresponding to the tool point, said second spindle means being in solid engagement with the frame structure supporting the milling head which is adapted to move in three directions along the reference axis X, Y and Z of the machine, first motor housed in said second spindle means connected via a chain and sprocket transmission through a safety friction means to a worm and gear mechanism engaging said first spindle means to control rotation about said first axis with a friction-type torque limiter secured by said second spindle means and engaging said first spindle means and adapted to absorb or eliminate jerks or shocks during operation of the machine, and second motor housed in said frame structure connected via a chain and sprocket transmission through a safety friction means to a worm and gear mechanism engaging said second spindle means to control rotation about said second axis with a friction-type torque limiter secured by said frame structure and engaging said second spindle means and adapted to absorb or eliminate jerks or shocks during operation of the machine.
Claim 2
Dependent Claim
289 words
Milling head for digit control machine adapted to machine evolutive surfaces comprising a tool holder spindle having an axis of rotation and adapted to engage a tool having an extending point, a carrier device for swivelling and retracting said tool holder spindle as a function of the surfaces to be machined, said carrier having first spindle means adapted to pivot said tool holder spindle about a first pivot axis set at 45* to said spindle axis, said carrier having second spindle means to pivot said first pivot axis about a second pivot axis which is at 45* to said first pivot axis, said first and second pivot axes intersecting at a point corresponding to the tool point, said second spindle means being in solid engagement with the frame structure supporting the milling head which is adapted to move in three directions along the reference axis X, Y and Z of the machine, first motor housed in said second spindle means connected via a chain and sprocket transmission through a safety friction means to a worm and gear mechanism engaging said first spindle means to control rotation about said first axis with a friction-type torque limiter secured by said second spindle means and engaging said first spindle means and adapted to absorb or eliminate jerks or shocks during operation of the machine, and second motor housed in said frame structure connected via a chain and sprocket transmission through a safety friction means to a worm and gear mechanism engaging said second spindle means to control rotation about said second axis with a friction-type torque limiter secured by said frame structure and engaging said second spindle means and adapted to absorb or eliminate jerks or shocks during operation of the machine.
Claim 3
Dependent Claim
114 words
Milling head according to claim 1 wherein said friction-type torque limiter for damping out the jerks and shocks likely to occur during the machine operation comprises a pair of ''''floating'''' shoes of semi-circular configuration, each arcuate shoe comprising an inner arcuate member having a thin wall and adapted to be closed on a cylindrical friction surface about the pivot axis of the corresponding spindle means, and an outer arcuate member having a curvature concentric to that of said inner member and being rigid with the aforesaid means or structure on which said friction type torque limiter is secured, said arcuate members being resiliently connected at one common end to form a unitary resilient shoe.
Claim 4
Dependent Claim
69 words
Milling head according to claim 1, wherein the spindle of the first pivot axis is hollow and connected to a cover closing concentrically the spindle end and surrounding with a circular aperture the tool shank to constitute a chip suction duct so as to pick up the chips where and as they are formed, whule causing the suction air stream to cool the point and shank of said tool.
Claim 5
Dependent Claim
55 words
Milling head according to claim 3, wherein the first pivot axis is connected to said frame structure through a flexible extensible hose for discharging the chips, said hose being surrounded by another concentric extensible hose, the intermediate space between these hoses receiving the windings of the electric conductors or pipes for supplying power and fluid.
Claim 6
Dependent Claim
90 words
Milling head according to claim 1, wherein the means for guiding under rotational bearing conditions the tool carrier about the second pivot axis comprises an inclined taper-roller bearing of relatively large diameter, the drive being transmitted to the rotary carrier through a concentric internal barrel having slits cut therein so as to transmit to the spindle carrier assembly only the torque, the barrel elasticity resulting from the presence of said slits absorbing all flexion and expansion stresses and loads while damping out vibration produced during the operation of the machine.
Claim 7
Dependent Claim
41 words
Milling head according to claim 5, wherein the barrel controlling the spindle comprises two adjacEnt pairs of slits cut therein and opposed in a same plane with a relative off-set of 90*, an O-ring seal covering each pair of cut slits.
References Cited (Backward Citations)
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Cited
US1888302A
Cited
US2046624A
Cited
FR1390888A
Cited
US3448656A
Cited
US3359861A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |