GB2132534A - Backing bars for use in welding processes - Google Patents
Backing bars for use in welding processes Download PDFInfo
- Publication number
- GB2132534A GB2132534A GB08233660A GB8233660A GB2132534A GB 2132534 A GB2132534 A GB 2132534A GB 08233660 A GB08233660 A GB 08233660A GB 8233660 A GB8233660 A GB 8233660A GB 2132534 A GB2132534 A GB 2132534A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bar
- channel
- passageways
- backing
- gas
- 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.)
- Granted
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
- B23K9/00—Arc welding or cutting
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/035—Seam welding; Backing means; Inserts with backing means disposed under the seam
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
A backing bar for a welding process comprises an elongate bar 1 formed in its uppermost surface with a shallow channel 2 whose base is substantially flat. The bar includes at least two rows of passageways 5 set substantially normal to the flat surface of the shallow channel and positioned to place the channel in communication with a source of protective gas, e.g. argon. The bar may be of steel, copper or aluminium. The passageways 5 of one row may be offset with respect to those of the neighbouring row. The ends of the passageways 5 remote from the shallow channel 2 may communicate with a gas-in-feed channel 6. <IMAGE>
Description
SPECIFICATION
Backing bars for use in welding processes
This invention relates to backing bars for use in welding processes in which a protective gas atmosphere is employed.
Backing bars are used to confine weld beads as they are laid down to define a seam between adjoining metal pieces. Conventionally such bars comprise a metal bar of sufficient length to span the seam to be welded and include a 'V' shaped or arcuate groove into which a protective gas e.g.
argon is admitted through a row of spaced passageways which place the groove in connection with a source of the gas. Hitherto the holes have been drilled with bores inclined to the vertical.
Previous backing bars have the disadvantages that they are expensive to produce and that the weld surface is often found to be irregular or uneven because the gas is not evenly distributed throughout the seam length.
According to the present invention a backing bar for a welding or like process comprises an elongate bar formed in its uppermost surface with a shallow channel whose base is substantially flat, the backing bar including at least two rows of passageways set substantially normal to the flat surface of the groove and positioned to place the channel in connection with a source of protective gas. The bar may be manufactured from a suitable metal, for example steel, copper or aluminum.
Preferably the passageways of each row are offset with respect to the adjoining passageways of the neighbouring row to ensure a more even gas distribution along the entire length of the channel. The passageway ends remote from the channel are preferably countersunk and communicate with a second channel formed in the under surface of the bar which is adapted to convey gas from the gas source to the individual passageways.
The protective gas may be argon.
The invention will now be described with reference to accompanying diagrammatic drawings in which:
Figure 1 is a plan view from above of a backing bar in accordance with the invention;
Figure 2 is a plan view from below the bar illustrated in Figure 1:
Figure 3 is an end view taken in the direction of arrow A shown in Figure 1;
Figure 4 is a section taken along line lV-lV of
Figure 1; and
Figure 5 shows an enlarged detail of Figure 4.
The backing bar illustrated comprises an elongate metal bar 1 of steel, copper or aluminum which is formed in its upper surface with an elongate shallow channel 2 of a length at least equal to the length of seam to be welded. As will be seen from Figures 3 and 4 the channel 2 has a flat base 3 and sides 4 which extend normal to the base.
Two sets of passageways 5 place a channel 2 in communication with a further channel 6 formed in the undersurface of the backing bar and adapted to be connected to a source of protecting gas under pressure (not shown). The passageways 5 are set substantially normal to the flat base 3 and are countersunk at their lower extremities 7. The passageways of one row are offset with respect to the passageways of the other row.
When in use, location of the backing bar below the seam to be welded between two metal pieces is assisted by means of holes 8 drilled through one or each end of the backing bar. Protective gas e.g. argon is supplied via the lower channel 6 and the passageways 5 to the shallow upper channel 2 to provide in addition to a protective atmosphere for the weld bead a gas support cushion for the weld metal whilst molten and a cooling medium which rapidly chills the weld bead.
It has been found that the use of backing bars such as described leads to the production of weld beads having flat even profiles which require no further dressing even when used in an external surface of a welded assembly.
The backing bar can be used in conjunction with any welding processes where a protective gas atmosphere is employed.
Claims (Filed on 21/Nov/83)
1. A backing bar for a welding or like process comprising an eiongate bar formed in its uppermost surface with a shallow channel whose base is substantially flat, the backing bar including at least two rows of passageways set substantially normal to the flat surface of the shallow channel and positioned to place the channel in communication with a source of protective gas.
2. A backing bar as claimed in Claim 1 wherein the bar is manufactured from Steel, copper or
Aluminium.
3. A backing bar as claimed in Claim 1 or Claim 2 wherein the passageways of each row are offset with respect to the adjoining passageways of the neighbouring row to ensure a more even gas distribution along the entire length of the channel.
4. A backing bar as claimed in any one of the preceeding claims wherein the ends of the passageways remote from the channel communicate with a second channel formed in the under surface of the bar, which second channel is adapted to convey gas from the gas source to and through individual passageways to the shallow channel formed in the uppermost surface of the bar.
5. A backing bar as claimed in any one of the preceeding claims wherein the gas is argon.
6. A backing bar for a welding or like process substantially as herein described with reference to
Figures 1 to 5 of the accompanying drawings.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (6)
1. A backing bar for a welding or like process comprising an eiongate bar formed in its uppermost surface with a shallow channel whose base is substantially flat, the backing bar including at least two rows of passageways set substantially normal to the flat surface of the shallow channel and positioned to place the channel in communication with a source of protective gas.
2. A backing bar as claimed in Claim 1 wherein the bar is manufactured from Steel, copper or
Aluminium.
3. A backing bar as claimed in Claim 1 or Claim 2 wherein the passageways of each row are offset with respect to the adjoining passageways of the neighbouring row to ensure a more even gas distribution along the entire length of the channel.
4. A backing bar as claimed in any one of the preceeding claims wherein the ends of the passageways remote from the channel communicate with a second channel formed in the under surface of the bar, which second channel is adapted to convey gas from the gas source to and through individual passageways to the shallow channel formed in the uppermost surface of the bar.
5. A backing bar as claimed in any one of the preceeding claims wherein the gas is argon.
6. A backing bar for a welding or like process substantially as herein described with reference to
Figures 1 to 5 of the accompanying drawings.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB08233660A GB2132534B (en) | 1982-11-25 | 1982-11-25 | Backing bars for use in welding processes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB08233660A GB2132534B (en) | 1982-11-25 | 1982-11-25 | Backing bars for use in welding processes |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2132534A true GB2132534A (en) | 1984-07-11 |
GB2132534B GB2132534B (en) | 1986-05-08 |
Family
ID=10534516
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08233660A Expired GB2132534B (en) | 1982-11-25 | 1982-11-25 | Backing bars for use in welding processes |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2132534B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2886246A1 (en) * | 2013-12-19 | 2015-06-24 | MAHLE Behr France Hambach S.A.S | Joining device |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB770505A (en) * | 1955-05-05 | 1957-03-20 | Trent Tube Company | Improvements relating to method and apparatus for producing welded seam tubing |
GB936874A (en) * | 1961-04-07 | 1963-09-18 | Rolls Royce | Backing bar |
GB945986A (en) * | 1961-11-29 | 1964-01-08 | Standard Pressed Steel Co | Improvements in or relating to arc welding |
GB992906A (en) * | 1964-02-14 | 1965-05-26 | Rolls Royce | Improvements in or relating to welding |
GB1023056A (en) * | 1963-08-19 | 1966-03-16 | Crucible Steel Co America | Apparatus for controlling degree of penetration in welding, especially of tubing |
GB1217507A (en) * | 1967-12-13 | 1970-12-31 | Herbert Witzenmann | Method and device for the continuous manufacture of thin-walled tubes of any length desired |
GB1588696A (en) * | 1977-03-31 | 1981-04-29 | Etudes Petrolieres Marines | Automatic welding of tubes |
-
1982
- 1982-11-25 GB GB08233660A patent/GB2132534B/en not_active Expired
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB770505A (en) * | 1955-05-05 | 1957-03-20 | Trent Tube Company | Improvements relating to method and apparatus for producing welded seam tubing |
GB936874A (en) * | 1961-04-07 | 1963-09-18 | Rolls Royce | Backing bar |
GB945986A (en) * | 1961-11-29 | 1964-01-08 | Standard Pressed Steel Co | Improvements in or relating to arc welding |
GB1023056A (en) * | 1963-08-19 | 1966-03-16 | Crucible Steel Co America | Apparatus for controlling degree of penetration in welding, especially of tubing |
GB992906A (en) * | 1964-02-14 | 1965-05-26 | Rolls Royce | Improvements in or relating to welding |
GB1217507A (en) * | 1967-12-13 | 1970-12-31 | Herbert Witzenmann | Method and device for the continuous manufacture of thin-walled tubes of any length desired |
GB1588696A (en) * | 1977-03-31 | 1981-04-29 | Etudes Petrolieres Marines | Automatic welding of tubes |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2886246A1 (en) * | 2013-12-19 | 2015-06-24 | MAHLE Behr France Hambach S.A.S | Joining device |
WO2015091884A1 (en) | 2013-12-19 | 2015-06-25 | Mahle International Gmbh | Joining device and joining method using said joining device |
Also Published As
Publication number | Publication date |
---|---|
GB2132534B (en) | 1986-05-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2011131A1 (en) | Arrangement for continuous induction welding | |
EP0152160A3 (en) | High strength low carbon steels, steel articles thereof and method for manufacturing the steels | |
UA6339A1 (en) | Casting mold and method for continuous vertical casting of stell strip | |
MX9702151A (en) | Apparatus and method for the vertical casting of a metalbar. | |
KR20010113958A (en) | Heat exchanger and method for producing a heat exchanger | |
US4247074A (en) | Casting mold for aluminothermically welding rails together | |
GB2132534A (en) | Backing bars for use in welding processes | |
CA2273413A1 (en) | Apparatus and method for sealing foil material | |
NO844040L (en) | METHOD AND APPARATUS FOR MANUFACTURING STRENGTH METAL BANDS | |
WO1998058528A3 (en) | Apparatus and method for coextruding materials at different temperatures | |
US3687433A (en) | Protective device for conveyors | |
US4540362A (en) | Furnace curtains | |
CN218807417U (en) | Antiseized fixable's coil of strip saddle | |
US2731136A (en) | Can body conveyor with horn aligning device | |
JPS57199590A (en) | Arc welding joint | |
DE1803291C (en) | Device for butt welding | |
EP0312744A3 (en) | Internally cooled roll and method for manufacturing the same | |
JPS5781988A (en) | Post heat treatment of weld zone of steel strip and its line installation | |
Hofer et al. | Process and Installation for the Continuous Production of Dead-Flat Expanded-Metal Strip | |
DE3662495D1 (en) | Process for continuously casting metallic products | |
Tlyusten | Ways for Improvement of Equipment for Extrusion of Aluminum Alloys | |
Krucher | Technological processes and equipment of'Mannesmann Demag' for production of copper and copper base alloys semifabricated products | |
Moshkevich et al. | The Effect of Metallurgical Factors on the Surface Quality of the Rolled Product of EI 94 High Manganese Steel | |
DE1540804C (en) | Process for butt welding | |
Wusatowski et al. | Rolled Stock Improvement by Temperature and Deformation Control |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19951125 |