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WO1998057775A1 - Soudeuse permettant l'alignement precis de deux pieces et leur soudure - Google Patents

Soudeuse permettant l'alignement precis de deux pieces et leur soudure Download PDF

Info

Publication number
WO1998057775A1
WO1998057775A1 PCT/US1998/012722 US9812722W WO9857775A1 WO 1998057775 A1 WO1998057775 A1 WO 1998057775A1 US 9812722 W US9812722 W US 9812722W WO 9857775 A1 WO9857775 A1 WO 9857775A1
Authority
WO
WIPO (PCT)
Prior art keywords
alignment
piece
jaw
weldable material
terminus
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US1998/012722
Other languages
English (en)
Inventor
Michael Guerrina
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US08/878,394 external-priority patent/US6121567A/en
Application filed by Individual filed Critical Individual
Priority to AU79779/98A priority Critical patent/AU7977998A/en
Publication of WO1998057775A1 publication Critical patent/WO1998057775A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass
    • B23K37/04—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass for holding or positioning work
    • B23K37/053—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass for holding or positioning work aligning cylindrical work; Clamping devices therefor
    • B23K37/0533—External pipe alignment clamps

Definitions

  • Applicant's invention relates to the joining together of two pieces of material by welding.
  • Misalignment during welding creates discontinuities at the abutment junction of the two pieces of weldable material that can serve as havens for particle impurities.
  • the existence of these particle "sites" is intolerable when the welding is being performed in connection with ultra-pure applications such as are common in the semiconductor industry.
  • misalignment can result in a leaky junction that destroys the purity of the substance flowing through the tubing and creates a potentially dangerous external environment if the substance flowing through the tubing is toxic.
  • the conventional weld head on a standard orbital welder has such little clamping surface area that proper alignment of the pieces of weldable material is often the most significant and time- consuming challenge facing the technician operating the welder.
  • welding is often performed on pieces of weldable material that are many feet in length and that may have hardware are other accessories permanently attached thereto.
  • the technician is sometimes required to place one end of a weldable material piece upon support blocks so that the weight of the weldable material and any attached hardware does not drag the weldable material out of alignment.
  • the technician has an extremely limited view of the junction to be welded as he attempts to align the two pieces of weldable material to each other and position the junction of the two pieces in line with the electrode.
  • the technician may use a "feeler" gauge such as a small screwdriver. The feeler gauge is moved by the technician over the top or side of the abutment junction, allowing the technician to determine which of the two pieces of weldable material needs to be moved to improve the alignment. Even after achieving acceptable alignment of the pieces to be welded together, the technician is also required to position the tu ⁇ e junction to be welded in line with the electrode, to ensurs a proper weld.
  • Tack welds join the two pieces of weldable material together and are sufficiently strong to prevent the separation and twisting effect described above. During final welding, the tack welds merely are re- melted into the final weld.
  • Applicant's prior invention which is the subject of Patent Application No. Serial No. 08/318,385, has addressed this alignment problem by teaching the use of a device which allows two pieces of weldable material to be precisely aligned cid tack welded together.
  • Applicant's prior invention is a definite improvement over the prior art, it still is not an ideal solution, because once the tack weld is completed, the technician must then spend time switching instruments to perform a full weld with a conventional orbital weld head.
  • the present invention expands and i,, ⁇ proves upon the concept taught by Applicant's prior invention, by teaching the use of a device that causes two pieces of weldable material to be precisely aligned and completely welded together, thereby eliminating the steps of tack welding and then switching instruments to perform a complete weld.
  • the present invention by mechanizing the aligning task, has all of the benefits of a conventional orbital welder, but greatly reduces the time required to achieve tolerable alignment and eliminates the separation, twisting, and clamp mark problems associated with the use of a conventional orbital welder.
  • FIG. 1 is a perspective view of the alignment/ welding device in the closed position
  • FIG. 2 is an exploded view showing the arrangement of the various components that comprise the preferred embodiment of the alignment/welding device
  • FIG. 3 is a perspective view of the alignment/ welding device showing the device being closed from a fully open position to a partially closed first position, wherein the pre- lock clamping jaw rests against the first jaw;
  • FIG. 4 is a partial cut-away view of a portion of the alignment/welding device in the closed position with welding material present;
  • FIG. 5 is a depiction of the distance "dl" which is used to measure alignment tolerances.
  • FIG. 6 is an exploded view of the electrode/ - rotating gear assembly of the alignment/welding service .
  • FIG. 7 is a perspective view of a portion of the alignment/welding device, illustrating the manner in which the electrodes are wired.
  • FIG. 8 is a cut-away view of a portion of the alignment/welding device with a piece of weldable material in place, illustrating the manner in which the rotating gear assembly is arranged.
  • FIG. 9 is a cross-sectional view of the top portion of the alignment/welding device that holds the weldable pieces of material when such alignment/welding device is in the fully open position
  • FIG. 10 is a cross-sectional view of the top portion of the alignment/welding device that holds the weldable pieces of material, when the first piece of weldable material has been inserted into the alignment/welding device and the alignment/welding device is closed to a partially closed first position, securely clamping the first piece of weldable material.
  • FIG. 11 is a cross-sectional view of a portion of the alignment/welding device that holds the weldable pieces of material, when the second piece of weldable material has been inserted into t ⁇ * e alignment/welding device to abut against uhe first piece of weldable material, and the alignment/welding device is closed to a fully closed, second position, securely clamping the second piece of weldable material
  • FIG. 12 is a cross-sectional view of a portion of the alignment/welding device that holds the weldable pieces of material, after the two pieces of weldable material are securely clamped in place and the rotating gear assembly begins rotating the arcing electrodes around the abutment junction of the two pieces of weldable material, thereby welding the junction.
  • FIG. 13 is a cross-sectional view of a portion of the alignment/welding service that holds the weldable pieces of material, after the two pieces of weldable material have been welded together at the abutment junction and the alignment/weld: ng device has been returned to a fully open position.
  • alignment/ welding device 45 preferably has a first jaw 46, a second jaw 08 and a pre-lock clamping jaw 15.
  • the first jaw 46 has a substantially semi-cylindrical gap which forms a first alignment zone 47.
  • the second jaw 08 also has a substantially semi -cylindrical gap which forms a second alignment zone 48.
  • the pre-lock clamping jaw 15 also has a substantially semi-cylindri- cal gap which forms a third alignment zone 50.
  • the first jaw 45 and second jaw 08 are pivotally joined together in a conventional pivot fashion, as commonly found in pliers or other similar hand tools, by using a pivot pin, bolt or similar component 49.
  • the pre-lock clamping jaw 15 is mounted on the pivot pin 49 alongside the second jaw 08.
  • the first jaw 46 aligns with and abuts against the pre-lock clamping jaw 15, in such a manner that the first alignment zone 47, and the third align- ment zone 50 form a substantially cylindrical first section of an alignment conduit.
  • the first jaw 46 When the device is place in the fully closed second position, the first jaw 46 also is aligned with and abuts against the second jaw in such a manner that the first alignment zone 47 and the second alignment zone 48 form a substantially cylindrical second section of the alignment conduit which is substantially the same diameter as and contiguous with, the first section of the alignment conduit.
  • the diameter of the first section and second section of the alignment conduit preferably are substantially equal to the diameter of the pieces of weldable material to be welded together.
  • tension rod 31 connects the pre-lock clamping jaw 14 to the second jaw 08 and pivotally advances pre-lock clamping jaw 14 so that the pre-lock clamping jaw 14 leads the second jaw 08 when the device is being closed, as shown in figure 3.
  • the device 45 is closed to a first position by actuating a double acting/single rod pneumatic cylinder 37 (figure 2) or similar device.
  • a pneumatic cylinder In place of a pneumatic cylinder, other well-known methods for closing the device can be used, such as a ratcheting gear or even manual pressure applied by the technician.
  • the pre- lock clamping jaw 14 abuts against the first jaw 46 as illustrated in figure 3 and the first section of the alignment conduit is formed.
  • the second jaw also abuts against the first jaw and the second section of the alignment conduit is formed.
  • the second jaw 8 and the pre- lock clamping jaw 14 are firmly positioned against the first jaw 46.
  • This mechanism allows a first piece of weldable material 51 and a second weldable material piece 52 to be secured into device 45 independently of one another.
  • the manner in which the device 45 is used to align and weld two pieces of weldable material is best demonstrated by referring to Figures 9-12. As illustrated in Figure 9, the technician places the first piece of weldable material 51 between the first jaw 46 and pre-lock clamping jaw 14, abutting against the retractable centering pin 41, located in the first jaw.
  • the centering pin is preferably spring- loaded and adjusted with a set screw.
  • the centering pin is positioned such that it extends into the alignment conduit and is in the same plane of spatial orientation as the plurality of electrodes which also extend into the alignment conduit 40.
  • the purpose of the centering pin is to center the abutment junction of the two pieces of weldable material directly in line with the electrodes and, therefore, any mechanism that would serve this purpose, would suffice.
  • the pre- lock clamping jaw 14 makes contact with the first jaw 46, thereby firmly securing the first weldable material piece 51 in the first section of the alignment conduit, with the first terminus of the first piece of weldable material being located in the same plane of spatial orientation as the electrodes 40.
  • the technician then places the second piece of weldable material 52 between the first jaw 46 and second jaw 08, with the terminus of said second piece abutting the first terminus of the first weldable material piece 51. This action will cause the centering pin 41 to be depressed.
  • the two pieces of weldable material will contact each other and form an abutment junction in substantially the same plane of spatial orientation as the electrodes 40 surrounding the alignment conduit.
  • the second jaw 08 contacts the first jaw 46 and firmly secures the second piece of weldable material 52 within the second alignment conduit.
  • first weldable material piece 51 and the second weldable material piece 52 will be in strict alignment with each other. Alignment tolerances of 10% or better can be achieved by the device 45 where the alignment tolerance equals the distance by which the weldable material pieces deviate from perfect alignment, divided by the diameter of the weldable material pieces .
  • the distance by which the weldable material pieces deviate from perfect alignment is shown as "dl" in figure 5 and is measured at the largest exposed edge of first weldable material piece 51 at the junction with second weldable material piece 52.
  • the first weldable material piece 51 and the second weldable material piece 52 are in place and the junction of these two pieces are in substantially the same plane of spatial orientation as the electrodes 40. Furthermore, the first weldable material piece 51 and the second weldable material piece 52 are in alignment with each other. With the first weldable material piece 51 and the second weldable material piece 52 thus securely clamped into place, device 45 can now be used for the weld process .
  • argon gas from an external source will flow into purge lines 55 via an external hose (not shown) .
  • the weld process is then initiated by depressing switch 44 which is depicted in Figure 1.
  • the external welder (not shown) will supply an electric charge via wires 56 (figure 7) to the contacts 39 which will then cause electrodes 40 to arc to the abutment junction, thereby beginning the weld.
  • An electric motor 29 or similar device then rotates u- joint 28, which, in turn, rotates the primary drive gear 25.
  • the primary drive gear 25 then rotates the secondary drive gear 23, thereby rotating insulating gears 09 and 16 a total of approximately 130 degrees.
  • the rotation of the insulating gears 09 and 16 allows the electrodes 40 to revolve around the abutment junction, thereby creating a complete weld of the abutment junction.
  • pressure is applied to the return side of the pneumatic cylinder 37 (figure 1) , thereby releasing the pre-lock clamping jaw 14 and second jaw and allowing the fused weldable material piece to be removed from the device 45 as illustrated in Figure 13.

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Arc Welding In General (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

L'invention porte sur un appareil et le procédé associé permettant d'aligner avec précision deux pièces (51, 52) d'un matériau soudable, et sur la soudure desdites pièces (51, 52). L'appareil comporte des moyens séparés (8, 14) de fixation des deux pièces (51, 52), et de centrage de la jonction entre les deux pièces (51, 52) sur les électrodes de soudure.
PCT/US1998/012722 1997-06-18 1998-06-18 Soudeuse permettant l'alignement precis de deux pieces et leur soudure Ceased WO1998057775A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU79779/98A AU7977998A (en) 1997-06-18 1998-06-18 Welder for precisely aligning, welding two pieces

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/878,394 US6121567A (en) 1994-10-05 1997-06-18 Apparatus and method for precisely aligning and welding two pieces of weldable material
US08/878,394 1997-06-18
US87839498A 1998-06-18 1998-06-18

Publications (1)

Publication Number Publication Date
WO1998057775A1 true WO1998057775A1 (fr) 1998-12-23

Family

ID=27128484

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/012722 Ceased WO1998057775A1 (fr) 1997-06-18 1998-06-18 Soudeuse permettant l'alignement precis de deux pieces et leur soudure

Country Status (1)

Country Link
WO (1) WO1998057775A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104321160A (zh) * 2012-05-18 2015-01-28 林肯环球股份有限公司 具有快速释放插入件的焊接头的可调节的夹持机构

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3194936A (en) * 1962-03-30 1965-07-13 North American Aviat Co Inc Welded connection, method and apparatus
US3350534A (en) * 1964-04-06 1967-10-31 Gen Electric Electrode holder
US3636294A (en) * 1968-12-31 1972-01-18 Jean Pierre Peyrot Self-centering tube-butting clamp
US3688072A (en) * 1971-03-24 1972-08-29 Weatherhead Co Welding head inert gas supply
US3870849A (en) * 1972-03-17 1975-03-11 Henry V Rygiol Multi-arc pipe welding
US5288963A (en) * 1993-07-22 1994-02-22 Hobart Brothers Company Actively cooled weld head cassette

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3194936A (en) * 1962-03-30 1965-07-13 North American Aviat Co Inc Welded connection, method and apparatus
US3350534A (en) * 1964-04-06 1967-10-31 Gen Electric Electrode holder
US3636294A (en) * 1968-12-31 1972-01-18 Jean Pierre Peyrot Self-centering tube-butting clamp
US3688072A (en) * 1971-03-24 1972-08-29 Weatherhead Co Welding head inert gas supply
US3870849A (en) * 1972-03-17 1975-03-11 Henry V Rygiol Multi-arc pipe welding
US5288963A (en) * 1993-07-22 1994-02-22 Hobart Brothers Company Actively cooled weld head cassette

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104321160A (zh) * 2012-05-18 2015-01-28 林肯环球股份有限公司 具有快速释放插入件的焊接头的可调节的夹持机构
CN104321160B (zh) * 2012-05-18 2017-06-06 林肯环球股份有限公司 具有快速释放插入件的焊接头的可调节的夹持机构

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