US3691622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for friction welding
Assignee: Toyota Industries Corp
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Filing: 1970-02-17
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Granted: 1972-09-19
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Expires: 1990-02-17
Abstract
Abstract An improved method and apparatus for use in rotary bi-axle type friction welding, utilizing braking and clutching systems applied to both the drive side and driven side spindles. The stopping process of the driven system is controlled by the braking and clutching systems connected to the driven side spindle, and those systems are activated alternately to effectively dissipate the resultant heat energy caused by the stopping process.
Inventors
- 👤 Nobuo Takagi
- 👤 Takashi Takiguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:35
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/12; B23K20/121
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
257 words
In a rotary bi-axle type friction welding apparatus for effecting friction welding of two work-pieces and having a first automatically controlled chuck for releasably holding one workpiece, a driving spindle coaxially holding said first chuck, a first housing rotatably mounting said driving spindle thereon, driving means releasably connected to said driving spindle for rotationally driving same, a driven spindle disposed in axial alignment with said driving spindle, a second chuck for releasably holding the other workpiece mounted on an end of said driven spindle facing said first chuck, a second housing rotatably supporting said driven spindle, and means for urging said first and second chucks toward and away from each other, an improvement comprising a system for stopping the rotational movement of said driven spindle upon completion of the friction welding of the two work-pieces comprising a braking spindle rotatably mounted on said second housing in axial alignment with said driven spindle, braking means operative when actuated for releasably braking rotational movement of said braking spindle and permitting rotational movement of said braking spindle when not actuated, friction clutch means operative when actuated for releasably connecting said driven spindle to said braking spindle, and means for selectively and successively effecting concurrent actuation of both said friction clutch means and braking means for a first time interval followed by actuation of only said friction clutch means for a second time interval followed by concurrent actuation of both said friction clutch means and braking means for a third time interval to stop the rotational moVement of said driven spindle.
Claim 2
Dependent Claim
257 words
In a rotary bi-axle type friction welding apparatus for effecting friction welding of two work-pieces and having a first automatically controlled chuck for releasably holding one workpiece, a driving spindle coaxially holding said first chuck, a first housing rotatably mounting said driving spindle thereon, driving means releasably connected to said driving spindle for rotationally driving same, a driven spindle disposed in axial alignment with said driving spindle, a second chuck for releasably holding the other workpiece mounted on an end of said driven spindle facing said first chuck, a second housing rotatably supporting said driven spindle, and means for urging said first and second chucks toward and away from each other, an improvement comprising a system for stopping the rotational movement of said driven spindle upon completion of the friction welding of the two work-pieces comprising a braking spindle rotatably mounted on said second housing in axial alignment with said driven spindle, braking means operative when actuated for releasably braking rotational movement of said braking spindle and permitting rotational movement of said braking spindle when not actuated, friction clutch means operative when actuated for releasably connecting said driven spindle to said braking spindle, and means for selectively and successively effecting concurrent actuation of both said friction clutch means and braking means for a first time interval followed by actuation of only said friction clutch means for a second time interval followed by concurrent actuation of both said friction clutch means and braking means for a third time interval to stop the rotational moVement of said driven spindle.
Claim 3
Dependent Claim
16 words
An improvement according to claim 1, wherein said braking means is a wet-type multi-disk electro-magnetic brake.
Claim 4
Dependent Claim
16 words
An improvement according to claim 1, wherein said clutch means is a wet-type multi-disk electro-magnetic clutch.
Claim 5
Dependent Claim
183 words
In a method for carrying out frictional welding of two work-pieces by a bi-axle rotary type frictional welding apparatus including a driving spindle having a driving force applied thereto, a braking spindle having a brake, a driven spindle connected to said braking spindle through a friction clutch and means for releasably mounting the work-pieces on the respective driving and driven spindles for frictional engagement; an improvement comprising the steps of detecting the rotational speeds of the driving and driven spindles, actuating the brake on the braking spindle, removing the driving force applied to said driving spindle immediately after a relative rotational speed of the work-pieces held by said driving and driven spindles becomes zero, releasing only one of said work-pieces from its associated spindle, actuating said friction clutch for concurrent operation with the previously actuated brake, deactuating said brake when the rotational speed of said driven spindle decreases to a predetermined value, and again actuating said brake after rotation of said braking spindle is accelerated and synchronized with that of said driven spindle, thereby stopping rotational movement of said driven and braking spindles.
Claim 6
Dependent Claim
183 words
In a method for carrying out frictional welding of two work-pieces by a bi-axle rotary type frictional welding apparatus including a driving spindle having a driving force applied thereto, a braking spindle having a brake, a driven spindle connected to said braking spindle through a friction clutch and means for releasably mounting the work-pieces on the respective driving and driven spindles for frictional engagement; an improvement comprising the steps of detecting the rotational speeds of the driving and driven spindles, actuating the brake on the braking spindle, removing the driving force applied to said driving spindle immediately after a relative rotational speed of the work-pieces held by said driving and driven spindles becomes zero, releasing only one of said work-pieces from its associated spindle, actuating said friction clutch for concurrent operation with the previously actuated brake, deactuating said brake when the rotational speed of said driven spindle decreases to a predetermined value, and again actuating said brake after rotation of said braking spindle is accelerated and synchronized with that of said driven spindle, thereby stopping rotational movement of said driven and braking spindles.
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) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |