US3788760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tapping head for punch press
Assignee: AMADA Ltd
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Filing: 1971-09-13
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Granted: 1974-01-29
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Expires: 1991-09-13
Abstract
Abstract A unitized tapping head is incorporated into the turret of a multiple-tool punch press. The tapping head includes a unique replaceable cartridge which houses a tap and a feed lead screw. A self-contained drive unit rotates the cartridge to advance the tap at the same lead as the threads on the feed lead screw. The cartridge is held only by a simple spring clip and thus is easily replaced with the same or a different combination tap and corresponding feed lead screw.
Inventors
- 👤 D Daniels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:36
CPC Classifications
B; B23; B23G; B23G1/00; B23G1/16; B23G3/00; B23G3/005; Y; Y10; Y10T; Y10T408/00; Y10T408/08; Y10T408/36; Y10T408/37; Y10T408/65; Y10T408/655; Y10T408/66; Y10T408/675; Y10T408/6757; Y10T408/6793
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
199 words
In a machine having a tapping head and means for supporting a workpiece opposite said tapping head; said tapping head comprising means for removably holding a tap for rotational and axial movement; and drive means for simultaneously rotating and advancing said tap into a workpiece positioned on said workpiece supporting means; said tapping head including a hollow base secured to said tool holding means; said means for removably holding the tap for rotational and axial movement including a cartridge releasably retained in said base and removable as a unit in a direction away from said workpiece supporting means; said cartridge including a core member having an outer end, said tap being secured in said outer end of said core member, a feed lead screw having a longitudinal axis concentric with the longitudinal axis of said tap, said tap and said lead screw having threads of substantially identical lead; and said drive means including force transmitting means secured in said base for advancing the core member relative to the lead screw and allowing said cartridge to be slid axially out of said base as a unit away from said workpiece for replacement of said feed lead screw and said tap.
Claim 2
Dependent Claim
199 words
In a machine having a tapping head and means for supporting a workpiece opposite said tapping head; said tapping head comprising means for removably holding a tap for rotational and axial movement; and drive means for simultaneously rotating and advancing said tap into a workpiece positioned on said workpiece supporting means; said tapping head including a hollow base secured to said tool holding means; said means for removably holding the tap for rotational and axial movement including a cartridge releasably retained in said base and removable as a unit in a direction away from said workpiece supporting means; said cartridge including a core member having an outer end, said tap being secured in said outer end of said core member, a feed lead screw having a longitudinal axis concentric with the longitudinal axis of said tap, said tap and said lead screw having threads of substantially identical lead; and said drive means including force transmitting means secured in said base for advancing the core member relative to the lead screw and allowing said cartridge to be slid axially out of said base as a unit away from said workpiece for replacement of said feed lead screw and said tap.
Claim 3
Dependent Claim
63 words
The apparatus of claim 1 said tool holding means including a multiple tool turret having an upper plate provided with circumferentially spaced tool holding opening, said tapping head secured within one of said openings, and means for positioning the turret to place a desired opening over a desired location on a workpiece in the same manner as any other tool on the turret.
Claim 4
Dependent Claim
26 words
The apparatus of claim 2, said drive means including means for automatically stopping the movement of the core member when the tap is full-out and full-in.
Claim 5
Dependent Claim
43 words
The apparatus of claim 1, said drive means including a motor having a worm gear, a pinion gear driven from said worm gear, and means for operatively connecting said pinion gear to said tap for rotating the tap while allowing relative axial movement.
Claim 6
Dependent Claim
183 words
A tapping head for a machine having a workpiece supporting means, comprising means for removably holding a tap for rotational and axial movement, and drive means for simultaneously rotating and advancing said tap for moving said tap into a workpiece positioned on said workpiece supporting means, said drive means including a motor having a worm gear, a pinion gear driven from said worm gear, and means for operatively connecting said pinion gear to said tap for rotating the tap while allowing relative axial movement, said means for operatively connecting said pinion gear with said tap including a core member having a spline and groove connection for allowing axial movement of the core while being rotated by said pinion gear, a feed lead screw secured against rotation in said tapping head, a bushing secured to said core member and threadably engaging said lead screw whereby rotation of the pinion screws the bushing and thus thE core member axially, said tap being secured within said core member and extending downwardly therefrom for cutting a thread in said workpiece when the tap is rotated and advanced.
Claim 7
Dependent Claim
183 words
A tapping head for a machine having a workpiece supporting means, comprising means for removably holding a tap for rotational and axial movement, and drive means for simultaneously rotating and advancing said tap for moving said tap into a workpiece positioned on said workpiece supporting means, said drive means including a motor having a worm gear, a pinion gear driven from said worm gear, and means for operatively connecting said pinion gear to said tap for rotating the tap while allowing relative axial movement, said means for operatively connecting said pinion gear with said tap including a core member having a spline and groove connection for allowing axial movement of the core while being rotated by said pinion gear, a feed lead screw secured against rotation in said tapping head, a bushing secured to said core member and threadably engaging said lead screw whereby rotation of the pinion screws the bushing and thus thE core member axially, said tap being secured within said core member and extending downwardly therefrom for cutting a thread in said workpiece when the tap is rotated and advanced.
Claim 8
Dependent Claim
92 words
A tapping head for a machine having a workpiece supporting means, comprising a means for removably holding a tap for rotational and axial movement, and drive means for simultaneously rotating and advancing said tap for moving said tap into a workpiece positioned on said workpiece supporting means, said drive means including an hydraulic motor having a fluid inlet and outlet and at least one pair of fluid driven gears between said inlet and outlet, one of said gears operatively interconnected with the tap for rotating the tap and moving the tap axially.
Claim 9
Dependent Claim
92 words
A tapping head for a machine having a workpiece supporting means, comprising a means for removably holding a tap for rotational and axial movement, and drive means for simultaneously rotating and advancing said tap for moving said tap into a workpiece positioned on said workpiece supporting means, said drive means including an hydraulic motor having a fluid inlet and outlet and at least one pair of fluid driven gears between said inlet and outlet, one of said gears operatively interconnected with the tap for rotating the tap and moving the tap axially.
Claim 10
Dependent Claim
110 words
The apparatus of claim 6, said means for operatively connecting said gear with said tap including a core member having a spline and groove interconnection with said gear for allowing axial movement of said core member as it is rotated, a feed lead screw secured against rotation in said tapping head, a bushing secured to said core member and threadably engaging said feed lead screw whereby rotation of the gear screws the core member axially, said tap being secured within said core member and extending downwardly therefrom for cutting a thread in said workpiece at the same lead as the feed lead screw when the tap is rotated and advanced.
Claim 11
Dependent Claim
66 words
The apparatus of claim 3, said punching machine having a numerical control device for positioning the turret and workpiece and actuating the tapping head according to a prearranged program, said control device automatically actuating the drive means for tapping the workpiece so that the workpiece is tapped with the same program and at the same position beneath the turret as any other tool on the turret.
Claim 12
Dependent Claim
162 words
A tapping head for use in a machine suitable for tapping holes in a workpiece supported on a workpiece supporting means comprising a hollow base, a cartridge means for removably mounting said cartridge in said base, drive means for rotating said cartridge, said cartridge including a tap, a feed lead screw, means interconnecting said tap and feed lead screw wherein rotation of said cartridge simultaneously rotates and axially moves said tap at the same rate as the lead of said feed lead screw whereby a change of tap size is effected by replacing the entire cartridge with a cartridge having the new tap size and a new feed lead screw corresponding to the new tap size so that the tap and the lead rate are always properly correlated, said cartridge being removable from said base and said drive means within said base in a direction away from said workpiece supporting means for ease of replacement of said tap and feed lead screw.
Claim 13
Dependent Claim
162 words
A tapping head for use in a machine suitable for tapping holes in a workpiece supported on a workpiece supporting means comprising a hollow base, a cartridge means for removably mounting said cartridge in said base, drive means for rotating said cartridge, said cartridge including a tap, a feed lead screw, means interconnecting said tap and feed lead screw wherein rotation of said cartridge simultaneously rotates and axially moves said tap at the same rate as the lead of said feed lead screw whereby a change of tap size is effected by replacing the entire cartridge with a cartridge having the new tap size and a new feed lead screw corresponding to the new tap size so that the tap and the lead rate are always properly correlated, said cartridge being removable from said base and said drive means within said base in a direction away from said workpiece supporting means for ease of replacement of said tap and feed lead screw.
Claim 14
Dependent Claim
100 words
The tapping head of claim 9, said cartridge further including a core member having a spline and groove connection with said drive means, the tap secured in one end of said core member, an axial bore in the other end of said core member, a bushing in said axial bore and secured to said core member, said feed lead screw threadably engaging said bushing, means for securing said feed lead screw against rotation in said base whereby rotation of said core member axially advances the bushing and thus the core member along said feed lead screw at the desired lead.
Claim 15
Dependent Claim
99 words
The tapping head of claim 7, said means for removably mounting said cartridge in said base including a latch plate secured to the base and having a central bore, a groove around the periphery of said bore, said feed lead screw having a head provided with a circumferential groove, and a spring clip compressible entirely within said groove in said head for permitting withdrawal of said cartridge from said base and expandable to partially seat in said groove in said head and said groove in central bore of said latch plate for releasably locking said cartridge in said base.
Claim 16
Dependent Claim
25 words
The apparatus of claim 1, said drive means including means for automatically stopping movement of the core member when the tap is full-out and full-in.
Claim 17
Dependent Claim
54 words
The tapping head of claim 9, said means for removably mounting said cartridge in said base including a latch plate secured to the base and having a central bore, and means releasably securing said cartridge to said latch plate, said cartridge being removable from said base through said central bore of said latch plate.
Claim 18
Dependent Claim
82 words
The tapping head of claim 13, a groove around the periphery of said central bore of said latch plate, said feed lead screw having a head provided with a circumferential groove, and a spring clip compressible entirely within said groove in said head for permitting withdrawal of said cartridge from said base and expandable to partially seat in said groove in said head and said groove in said central bore of said latch plate for releasably locking said cartridge in said base.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |