Setting apparatus for nut-type fastener such as blind nut
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B21D-009/05
B21J-015/22
B25B-027/00
출원번호
US-0726784
(2003-12-03)
우선권정보
JP-0361899 (2002-12-13)
발명자
/ 주소
Yamada, Hiroyuki
출원인 / 주소
Newfrey LLC
대리인 / 주소
Harness, Dickey &
인용정보
피인용 횟수 :
2인용 특허 :
4
초록▼
A setting apparatus 1 for setting a blind nut or the like to a workpiece, comprises a mandrel 7, a hydraulic cylinder 17 receiving therein a hydraulic piston 15 for axially pulling the mandrel 7, an oil reservoir 22 for containing oil to be supplied to the hydraulic cylinder 17, and an air cylinder
A setting apparatus 1 for setting a blind nut or the like to a workpiece, comprises a mandrel 7, a hydraulic cylinder 17 receiving therein a hydraulic piston 15 for axially pulling the mandrel 7, an oil reservoir 22 for containing oil to be supplied to the hydraulic cylinder 17, and an air cylinder 27 for receiving therein an air piston 26 connected to a ram 25 adapted to be reciprocatingly advanced and retracted in the oil reservoir 22. In response to the compressed air supplied to the air cylinder, the hydraulic piston 15 is moved to pull the mandrel 7, whereby a fastener threadedly connected with the mandrel is set to a workpiece. The setting apparatus 1 also includes an air-pressure setting valve 33 for adjustably presetting the air pressure of the compressed air to be supplied to the air cylinder 27. When the air pressure in said air cylinder reaches the preset air pressure level, the air-pressure setting valve 33 is operated to feed the compressed air from the air cylinder to completion valve activation assembly 13 so that a completion valve 11 is activated to stop the movement of the air piston 26 to prevent the mandrel 7 from being pulled.
대표청구항▼
1. A fastener setting apparatus for setting, to a workpiece, a nut-type fastener such as a blind nut which is formed as a hollow internally threaded tubular body with one end having a flange or a larger diameter portion, said fastener setting apparatus comprising: a mandrel adapted to be screwed int
1. A fastener setting apparatus for setting, to a workpiece, a nut-type fastener such as a blind nut which is formed as a hollow internally threaded tubular body with one end having a flange or a larger diameter portion, said fastener setting apparatus comprising: a mandrel adapted to be screwed into said fastener; a hydraulic cylinder for receiving therein a hydraulic piston for axially pulling said mandrel; an oil reservoir for containing oil to be supplied to said hydraulic cylinder; a ram reciprocatably disposed in said oil reservoir; an air cylinder for receiving therein an air piston which allows said ram connected thereto to be reciprocatingly advanced and retracted in said oil reservoir, wherein upon triggering, compressed air is supplied to said air cylinder to move said air piston to advance said ram into said oil reservoir to thereby supply oil from said oil reservoir to said hydraulic cylinder so that said hydraulic piston is moved to pull said mandrel, whereby said fastener threadedly connected with said mandrel is set to said workpiece,said fastener setting apparatus further comprising: an air-pressure setting valve for adjustably presetting the air pressure of the compressed air to be supplied in said air cylinder and applied to said air piston; a completion valve operable to discharge the compressed air from said air cylinder outside to stop the movement of said hydraulic piston; and completion valve activation assembly for enabling said completion valve to be operated, wherein when the air pressure in said air cylinder reaches the preset air pressure level, said air-pressure setting valve is operated to feed the compressed air from said air cylinder to said completion valve activation assembly so as to stop said hydraulic piston from axially pulling said mandrel at said preset air pressure. 2. The apparatus as defined in claim 1, wherein said air-pressure setting valve includes:a valve element; a valve housing for receiving said valve element therein and having an inlet in fluid communication with said air cylinder; a spring for pressing said valve element against said inlet with a certain spring force to prevent the compressed air in said air cylinder from being discharged; and a spring holder attached to said valve housing for holding said spring and having an outlet for releasing the compressed air, said spring holder being attached to said valve housing in such a manner that the pressing force of said spring can be changed, whereby the air pressure to be supplied to said air cylinder is preset according to the change of the pressing force of said spring. 3. The apparatus as defined in claim 2, wherein said completion valve activation assembly includes a cylinder for receiving the compressed air from said air-pressure setting valve, and a completion valve activating piston for moving said completion valve to its activated position, wherein a check valve is arranged in parallel with said air-pressure setting valve to discharge the compressed air remaining in said cylinder of said completion valve activation assembly to said air cylinder after the completion of the operation of said completion valve activation assembly, so as to return said completion valve activating piston to its initial position.4. The apparatus as defined in claim 2, further including: an air motor adapted to rotate said mandrel about its axis in a forward direction to allow said nut-type fastener to be threadedly connected with said mandrel and in a reverse direction to allow said threadedly connected fastener to be disengaged from said mandrel, wherein said completion valve is operable in its initial position to rotate said air motor in said forward direction, and operable in the activated position to rotate said air motor in said reverse direction, wherein when the air pressure onto the air piston reaches said preset air pressure level, said completion valve is moved to said activated position to rotate said air motor in said reverse direction so that said fastener threadedly connected with said mandrel is disengaged therefrom.5. The apparatus as defined in claim 1, wherein said fastener is a blind nut or a press nut.
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이 특허에 인용된 특허 (4)
Schwab Manfred F. (Wiesbaden DEX), Blind riveting apparatus for rivets of different sizes.
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