IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0927079
(2001-08-10)
|
발명자
/ 주소 |
- Bandy, Robert Lawrence
- Kalkhof, Carl Steven
|
출원인 / 주소 |
|
대리인 / 주소 |
Fay, Sharpe, Fagan, Minnich & McKee
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인용정보 |
피인용 횟수 :
19 인용 특허 :
8 |
초록
▼
A probe for touch sensing to determine the position of a workpiece in a robot welding system using a robot driven welding gun for advancing a welding wire in a given direction toward a workpiece. The gun is movable by a robot controlled arm in a selected weld path and the probe comprises a rigid, el
A probe for touch sensing to determine the position of a workpiece in a robot welding system using a robot driven welding gun for advancing a welding wire in a given direction toward a workpiece. The gun is movable by a robot controlled arm in a selected weld path and the probe comprises a rigid, elongated feeler with a touch tip which feeler is carried by a mechanism fixed with respect to the gun and movable by the mechanism between a retracted position and a known extended position wherein the feeler extends from the mechanism a fixed distance having an outermost contact point for the touch tip where the point has a known spatial relation to the gun. A detector detects when the contact point touches the workpiece to locate the workpiece. Several touches are used to determine the orientation of the workpiece for automatic welding.
대표청구항
▼
A probe for touch sensing to determine the position of a workpiece in a robot welding system using a robot driven welding gun for advancing a welding wire in a given direction toward a workpiece. The gun is movable by a robot controlled arm in a selected weld path and the probe comprises a rigid, el
A probe for touch sensing to determine the position of a workpiece in a robot welding system using a robot driven welding gun for advancing a welding wire in a given direction toward a workpiece. The gun is movable by a robot controlled arm in a selected weld path and the probe comprises a rigid, elongated feeler with a touch tip which feeler is carried by a mechanism fixed with respect to the gun and movable by the mechanism between a retracted position and a known extended position wherein the feeler extends from the mechanism a fixed distance having an outermost contact point for the touch tip where the point has a known spatial relation to the gun. A detector detects when the contact point touches the workpiece to locate the workpiece. Several touches are used to determine the orientation of the workpiece for automatic welding. out the emissive element and the non-emissive member. 10. A method according to claim 9, wherein the environment creating step occurs before the inserting step. 11. A method according to claim 1, wherein the inserting step includes forcibly inserting the emissive element into the non-emissive member when the non-emissive member becomes substantially flowable. 12. A method according to claim 1, further comprising crimping the assembly and metallic holder by pressing the metallic holder radially inward. 13. A method according to claim 1, further comprising shaping the metallic holder and assembly to a predetermined shape after the inserting step. 14. A method of fabricating an electrode adapted for supporting an arc in a plasma torch, the method comprising: providing a metallic holder defining a cavity in a front end thereof; positioning an emissive element in contact with a relatively non-emissive member; heating at least the non-emissive member until the non-emissive member becomes substantially flowable and the emissive element advances at least partially into the non-emissive member to define an assembly; and positioning the assembly into the metallic holder. 15. A method according to claim 14, wherein the heating step includes heating at least the non-emissive member such that the emissive element advances into the non-emissive member at least partially due to gravity. 16. A method according to claim 14, further comprising heating the assembly for a predetermined time after the emissive element advances into the non-emissivemember. 17. A method according to claim 14, further comprising cooling the assemblyafter the heating step. 18. A method according to claim 14, wherein the cooling step occurs before the positioning step. 19. A method according to claim 14, wherein the heating step includes heating at least the non-emissive member such that the emissive element advances into the non-emissive member substantially due to gravity. 20. A method according to claim 14, wherein the positioning step includes pressing the assembly in the cavity defined by the metallic holder. 21. A method according to claim 14, wherein the positioning step includes positioning an emissive element formed substantially from at least one of the materials selected from the group consisting of hafnium, zirconium, tungsten, and alloys thereof. 22. A method according to claim 14, wherein the positioning step includes positioning an emissive element adjacent a relatively non-emissive member formed substantially from at least one of the materials from the group consisting of silver, gold, platinum, rhodium, iridium, palladium, nickel, monel, and alloys thereof. 23. A method according to claim 14, wherein the heating step includes heating the non-emissive member in a crucible until the non-emissive member substantially melts. 24. A method according to claim 14, further comprising creating an environment having a relatively lower pressure about the emissive element and the non-emissive member. 25. A method according to claim 24, wherein the environment creating step occurs before the inserting step. 26. A method according to claim 14, wherein the assembly positioning step includes positioning the assembly into the metallic holder by way of one method selected from the group consisting of press fitting, brazing, welding, and equivalents thereof. 27. A method according to claim 26, wherein the welding method is selected from the group consisting of friction, resistance, electromagnetic discharge, and explosive welding. 28. A method of fabricating an electrode adapted for supporting an arc in a plasma torch, the method comprising: positioning an emissive element adjacent a relatively non-emissive member; heating at least the non-emissive member until the non-emissive member becomes substantially flowable and the emissive element advances at least partially into the non-emissive member to define an assembly having a front end and a body; allowing th
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