IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0940962
(2004-09-15)
|
등록번호 |
US-7444746
(2008-11-04)
|
우선권정보 |
FR-03 50632(2003-10-01) |
발명자
/ 주소 |
- Lanvin,Herve
- Rossato,Robert
|
출원인 / 주소 |
|
대리인 / 주소 |
Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
3 |
초록
It is described how to easily manufacture a pipe fitting by machining instead of casting, despite its complex shapes and its small dimensions. A model is created, a machining program is defined, checks are made and the previous results are input into a numerically controlled machine tool.
대표청구항
▼
The invention claimed is: 1. A method of manufacturing a pipe fitting comprising tubular parts, including the following steps: defining functions and constrains including constraints of the pipe fitting; preparing a model of the pipe fitting, based on said functions and constraints; checking that m
The invention claimed is: 1. A method of manufacturing a pipe fitting comprising tubular parts, including the following steps: defining functions and constrains including constraints of the pipe fitting; preparing a model of the pipe fitting, based on said functions and constraints; checking that making the pipe fitting is possible, and revising the model if any defects are diagnosed during said checking; defining a machining program for the pipe fitting, including selection of tools, tool trajectories and cutting parameters, using a software and the model; simulating machining the pipe fitting and revising the machining program if any errors are diagnosed during the simulating, and machining the pipe fitting by applying the machining program on a clamped block on a numerically controlled machine tool controlled by the machining program so as to machine an outside surface and an inside surface of the pipe fitting, the inside surface including a bend, wherein the checking step includes checking mechanical strength of the pipe fitting by an automatic computation based on parameters of the model. 2. The method according to claim 1, wherein the checking step comprises iterative adjustments of the model each followed by one of said checking of mechanical strength. 3. The method according to claim 2, wherein the iterative adjustments comprise adjustments of a thickness of a wall of the pipe fitting. 4. The method according to claim 2, wherein the iterative adjustment comprise additions of reinforcing ribs. 5. The method of manufacturing a pipe fitting according to claim 1, further comprising working on tube blanks by successive passes in steps, internal machining of the tubes by tangential cutting, finishing with adjustments of radii of curvature of the inside surface by tangential cutting, and a final cutting of the pipe fitting by separation of said pine fitting from a heel of the block remaining fixed to the machine tool. 6. The method of manufacturing a pipe fitting according to claim 1, wherein the simulating step includes checking collisions between tools and tool shanks with the pipe fitting. 7. The method of manufacturing a pipe fitting according to claim 1, wherein an outside and an inside surface of the pipe fitting are machined without intermediate disassembly of a machine tool fitting. 8. The method of manufacturing a pipe fitting according to claim 1, wherein said machine tool is configured to perform a High Speed Machining (HSM). 9. The method of manufacturing a pipe fitting according to claim 1, wherein said machining is performed on all surfaces of the pipe fitting. 10. The method of manufacturing a pipe fitting according to claim 9, further comprising a step of machining a reverse taper on an inside surface of the pipe fitting. 11. The method of manufacturing a pipe fitting according to claim 9, further comprising a step of mounting said pipe fitting in an aircraft. 12. A method of manufacturing a pipe fitting comprising tubular parts, including the following steps: defining functions and constrains including dimensional constraints of the pipe fitting; preparing a model of the pipe fitting, based on said functions and constraints; checking that making the pipe fitting is possible, and revising the model if any defects are diagnosed during said checking; defining a machining program for the pipe fitting including selection of tools tool trajectories and cutting parameters, using a software, a library of tools containing characteristics of tools including dimensional characteristics, and the model; using said software for simulating the machining program and revising the machining program if any errors are diagnosed, the simulating step including a checking of collisions between tools and tool shanks with the pipe fitting, and machining the pipe fitting by applying the machining program on a clamped block on a numerically controlled machine tool controlled by the machining program so as to machine an outside surface and an inside surface of the fitting, the inside surface including a bend. 13. The method of manufacturing a pipe fitting according to claim 12, including working on tube blanks by successive passes in steps, internal machining of the tubes by tangential cutting, finishing with adjustments of radii of curvature of the inside surface by tangential cutting, and a final cutting of the fitting by separate of the said fitting from a heel of the block remaining fixed to the machine tool. 14. The method of manufacturing a pipe fitting according to claim 12, wherein the checking includes checking mechanical strength of the pipe fitting. 15. The method of manufacturing a pipe fitting according to claim 12, wherein an outside and an inside surface of the pipe fitting are machined without intermediate disassembly of a machine tool fitting. 16. The method of manufacturing a pipe fitting according to claim 12, wherein said machine tool is configured to perform a High Speed machining (HSM). 17. The method of manufacturing a pipe fitting according to claim 12, wherein said machining is performed on all surfaces of the pipe fitting. 18. The method of manufacturing a pipe fitting according to claim 17, further comprising a step of machining a reverse taper on an inside surface of the pipe fitting. 19. The method of manufacturing a pipe fitting according to claim 17, further comprising a step of mounting said pipe fitting in an aircraft.
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