EP1326731A1 - Multiple upset, cold pressure, welding apparatus - Google Patents
Multiple upset, cold pressure, welding apparatusInfo
- Publication number
- EP1326731A1 EP1326731A1 EP00969692A EP00969692A EP1326731A1 EP 1326731 A1 EP1326731 A1 EP 1326731A1 EP 00969692 A EP00969692 A EP 00969692A EP 00969692 A EP00969692 A EP 00969692A EP 1326731 A1 EP1326731 A1 EP 1326731A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- workpiece
- die
- workpieces
- end portions
- split line
- 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.)
- Withdrawn
Links
- 238000003466 welding Methods 0.000 title claims abstract description 14
- 230000000694 effects Effects 0.000 abstract description 4
- 230000009172 bursting Effects 0.000 abstract description 2
- 230000002708 enhancing effect Effects 0.000 abstract description 2
- 230000002401 inhibitory effect Effects 0.000 abstract description 2
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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/02—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of a press ; Diffusion bonding
- B23K20/028—Butt welding
Definitions
- TITLE MULTIPLE UPSET, COLD PRESSURE, WELDING APPARATUS
- This invention relates to multiple upset, cold pressure, welding apparatus for effective butt welds in wire, rod, strip or tubular workpieces.
- WO 96/39272 describes a multiple upset, cold pressure, welding apparatus including a welding die set having two pairs of die halves each formed with a longitudinal groove in a split line face providing a bore in a closed position of the respective pairs of die halves for effecting gripping of end portions of first and second workpieces reciprocable between the closed position in which the associated portion of the workpiece is gripped and an open position in which the associated portion of the workpiece is released and also being reciprocable in a direction parallel to the longitudinal axis of the workpieces to apply or relax a welding pressure across abutting faces of the end portions of the workpieces.
- each die is formed with a split line face having a longitudinal groove generally corresponding in contour to a half section of the workpiece and having outwardly diverging flanks, each flank terminating in a linear knife edge bounding a recess extending longitudinally parallel to the groove in the split line face of the die.
- a pair of die halves 2 are formed with grooves 4 of part circular cross-section having knife shear edges 6 displaced from a plane containing die split line faces 8 of the respective halves 2.
- Recesses 10 are provided outwardly of the knife shear edges 6, and extend over the length of the die half parallel to the groove 4.
- end portions 12 of first and second workpieces are fed to respective pairs of die halves 2 and a clamping force applied to urge associated halves towards each other to a position as shown in figure 2 with the split line faces 8 abutting.
- the end portions 12 are clamped within the grooves 4 and any excess material arising from the end portion 12 being oversize in relation to the groove 4 deforms as flash 14 into the recess 10.
- the pairs of die halves 2 are then urged toward each other to initiate a cold pressure welding operation.
- the knife shear edges 6 are arranged to lie in the plane of the split line faces 8 such that, upon effecting clamping, the knife shear edges 6 sever the flash which is then removed upon the die halves 2 moving apart.
- recesses 10 may have cross-sections other than that depicted in Figures 1 and 2, such as, for example, semi-circular.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
Multiple upset, cold pressure, welding apparatus including (Fig. 2) a welding die set having two pairs of die halves (2) each formed with a longitudinal groove (4) in a split line face (8) providing a bore for effecting gripping of end portions (12) of first and second workpieces and reciprocable between the closed position in which the associated portion of the workpiece is gripped and an open position in which the associated portion of the workpiece is released and also being reciprocable in a direction parallel to the longitudinal axis of the workpiece to apply or relax a welding pressure across abutting faces of the end portions of the workpieces, each die being formed with a longitudinal groove (4) having outwardly diverging flanks terminating in a linear knife edge (6) bounding a recess (10) extending longitudinally parallel to the groove (4) in the split line face (8) of the die. Since, during clamping of the workpiece, any excess material deforms as flash (14), workpieces with end portions (12) of over-size or mis-shapen form may be clamped within the groove (4) without inhibiting the clamping effect or producing an unacceptable bursting force on the die halves. A satisfactory clamping effect is obtained over a larger tolerance band of workpiece dimensions than hitherto, thereby enhancing the versatility of a set of dies in respect of the range of workpieces which may be accommodated.
Description
TITLE: MULTIPLE UPSET, COLD PRESSURE, WELDING APPARATUS
DESCRIPTION
This invention relates to multiple upset, cold pressure, welding apparatus for effective butt welds in wire, rod, strip or tubular workpieces.
WO 96/39272 describes a multiple upset, cold pressure, welding apparatus including a welding die set having two pairs of die halves each formed with a longitudinal groove in a split line face providing a bore in a closed position of the respective pairs of die halves for effecting gripping of end portions of first and second workpieces reciprocable between the closed position in which the associated portion of the workpiece is gripped and an open position in which the associated portion of the workpiece is released and also being reciprocable in a direction parallel to the longitudinal axis of the workpieces to apply or relax a welding pressure across abutting faces of the end portions of the workpieces.
According to the present invention, each die is formed with a split line face having a longitudinal groove generally corresponding in contour to a half section of the workpiece and having outwardly diverging flanks, each flank terminating in a linear knife edge bounding a recess extending longitudinally parallel to the groove in the split line face of the die.
In one embodiment of the invention, as shown in Figures 1 , 2 and 3, a pair of die halves 2 are formed with grooves 4 of part circular cross-section having knife shear edges 6 displaced from a plane containing die split line faces 8 of the respective halves 2. Recesses 10 are provided outwardly of the knife shear edges 6, and extend over the length of the die half parallel to the groove 4.
In operation, end portions 12 of first and second workpieces are fed to respective pairs of die halves 2 and a clamping force applied to urge associated halves towards each other to a position as shown in figure 2 with the split line faces 8 abutting. The end portions 12 are clamped within the grooves 4 and any excess material arising from the end portion 12 being oversize in relation to the groove 4 deforms as flash 14
into the recess 10. The pairs of die halves 2 are then urged toward each other to initiate a cold pressure welding operation.
Since any excess material deforms as flash 14, workpieces with end portions 12 of over-size or mis-shapen form may be clamped within the grooves 4 without inhibiting the clamping effect or producing an unacceptable bursting force on the die halves. As a result, a satisfactory clamping effect is obtained over a tolerance band of workpiece dimensions larger than has hitherto been attainable, thereby enhancing the versatility of a set of dies in respect of the range of workpieces which may be accommodated.
In another embodiment, not shown, the knife shear edges 6 are arranged to lie in the plane of the split line faces 8 such that, upon effecting clamping, the knife shear edges 6 sever the flash which is then removed upon the die halves 2 moving apart.
It will be appreciated that the recesses 10 may have cross-sections other than that depicted in Figures 1 and 2, such as, for example, semi-circular.
Claims
1. Multiple upset, cold pressure, welding apparatus including a welding die set having two pairs of die halves (2) each formed with a longitudinal groove (4) in a split line face (8) providing a bore in a closed position of the respective pairs of die halves for effecting gripping of end portions (12) of first and second workpieces reciprocable between the closed position in which the associated portion of the workpiece is gripped and an open position in which the associated portion of the workpiece is released and also being reciprocable in a direction parallel to the longitudinal axis of the workpiece to apply or relax a welding pressure across abutting faces of the end portions of the workpieces, chacterised in that each die is formed with a split line face (8) having a longitudinal groove (4) generally corresponding in contour to a half section of the workpiece (12) and having outwardly diverging flanks, each flank terminating in a linear knife edge (6) bounding a recess (10) extending longitudinally parallel to the groove (4) in the split line face (8) of the die.
2. Multiple upset, cold pressure, welding apparatus as claimed in Claim 1, characterised in that the knife shear edges (6) lie in a plane containing the split line faces (8).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/GB2000/004038 WO2002032612A1 (en) | 2000-10-19 | 2000-10-19 | Multiple upset, cold pressure, welding apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1326731A1 true EP1326731A1 (en) | 2003-07-16 |
Family
ID=9886093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00969692A Withdrawn EP1326731A1 (en) | 2000-10-19 | 2000-10-19 | Multiple upset, cold pressure, welding apparatus |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1326731A1 (en) |
| CN (1) | CN1454130A (en) |
| AU (1) | AU2000279348A1 (en) |
| WO (1) | WO2002032612A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100384565C (en) * | 2006-05-18 | 2008-04-30 | 西南铝业（集团）有限责任公司 | The Method of Preventing Misalignment of Die Forgings with Complicated Profiles |
| JP5592554B1 (en) | 2013-12-18 | 2014-09-17 | 武延 本郷 | Cold welding apparatus, coil manufacturing apparatus, coil and manufacturing method thereof |
| EP4230337A3 (en) | 2013-12-18 | 2023-11-15 | Aster Co., Ltd. | An apparatus for manufacturing a coil and a coil manufacturing method |
| CN109822204B (en) * | 2019-03-01 | 2022-02-08 | 西安斯瑞先进铜合金科技有限公司 | Welding method for welding CuFe alloy material by cold pressing process |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3336655A (en) * | 1964-03-27 | 1967-08-22 | Kelsey Hayes Co | Die structure |
| US3653571A (en) * | 1969-06-19 | 1972-04-04 | Kelsey Hayes Co | Fine wire butt welder |
-
2000
- 2000-10-19 AU AU2000279348A patent/AU2000279348A1/en not_active Abandoned
- 2000-10-19 EP EP00969692A patent/EP1326731A1/en not_active Withdrawn
- 2000-10-19 WO PCT/GB2000/004038 patent/WO2002032612A1/en not_active Ceased
- 2000-10-19 CN CN00819738.5A patent/CN1454130A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0232612A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2000279348A1 (en) | 2002-04-29 |
| CN1454130A (en) | 2003-11-05 |
| WO2002032612A1 (en) | 2002-04-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 20021113 |
|
| AK | Designated contracting states |
Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20040501 |