US3679569A - Welded joint - Google Patents

Welded joint Download PDF

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Publication number
US3679569A
US3679569A US81056A US3679569DA US3679569A US 3679569 A US3679569 A US 3679569A US 81056 A US81056 A US 81056A US 3679569D A US3679569D A US 3679569DA US 3679569 A US3679569 A US 3679569A
Authority
US
United States
Prior art keywords
plate
rod
aluminum
mounting plate
welded joint
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.)
Expired - Lifetime
Application number
US81056A
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English (en)
Inventor
Kurt Springer
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.)
Alcan Holdings Switzerland AG
Original Assignee
Alusuisse Holdings AG
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
Application filed by Alusuisse Holdings AG filed Critical Alusuisse Holdings AG
Application granted granted Critical
Publication of US3679569A publication Critical patent/US3679569A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
    • C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
    • C25C3/08—Cell construction, e.g. bottoms, walls, cathodes
    • C25C3/12—Anodes
    • C25C3/125—Anodes based on carbon
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
    • C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
    • C25C3/16—Electric current supply devices, e.g. bus bars
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B7/00—Heating by electric discharge
    • H05B7/02—Details
    • H05B7/10—Mountings, supports, terminals or arrangements for feeding or guiding electrodes
    • H05B7/101—Mountings, supports or terminals at head of electrode, i.e. at the end remote from the arc

Definitions

  • a current conductor consisting of bundled copper or aluminum-rods or of a single cast aluminum bar, is located above the electrolytic cell.
  • the pre-baked anodes and the current conductor are connected by means of copper or aluminum contact rods, which are clamped onto the current conductor.
  • a perpendicular mounting plate to connect the contact rod with the pre-baked anodes. When this is done the mounting plate is rammed or pressed into the anode or is cast in by means of a liquid carbonaceous mass or liquid cast iron, and may be screwed together with the contact rod or be welded to same.
  • the plate must, however, be made of steel because of the high temperatures in the vicinity of the bath.
  • the screw-type connection between the contact rod and the anode' mounting plate has the disadvantage that due to heat and gasaction the contact resistance increases with time and, accordingly, the current carrying capacity deteriorates.
  • a welded connection or seam which is attained by ensuring that a lower section of the contact rod is welded to a vertical cut-out section in the mounting plate is superior to the screw connection as far as electrical conductivity is concerned.
  • certain disadvantages arise which are brought about by the different coeflicients of thermal expansion of the steel, copper or aluminum, thereby causing cracks to frequently occur in the welded seam, which likewise have an adverse eifect on the current carrying capacity.
  • the contact rods have a rectangular or quadratic cross-section and are rolled, extruded or continuously cast.
  • the cross-section of the copper rods may be approximately 80 x 25 mm.
  • it can either amount to 80 x 80 mm. or to 185 x 90 mm.
  • the length of said rods can vary between 1.8 and 3 m.
  • the mounting plates for example, can be 50 mm. thick, 800 mm. long and 500 mm. high, such as in an anode with a cross-section of an approximate length of 1,100 mm. and an approximate width of 500 mm.
  • the outer contour line of the mounting plate in a preferred embodiment has an approximately rectangular shape.
  • anode support comprising a steel carrier plate and a contact rod of aluminum or copper with its axis in the plane of the plate, the end of the rod has a diametral slot across it, perpendicular to the plane of the plate, and the plate and rod are welded together on both sides of the slot, the weld being interrupted by the width of the slot.
  • the slot can be made in a variety of shapes, for example with parallel walls, or tapered and widening downwards or widening outwards.
  • the walls are parallel.
  • the width is not critical and can for example lie between 1 mm. and 10 mm. A width of 2 mm. has been found satisfactory.
  • the weld is made on both faces of the carrier plate. of course it is preferable for the plane of the plate to lie centrally in the cross-section of the contact rod.
  • the contact rod extends into a cut-out in the plate which may be mm. to 200 mm. deep, and preferably the dimension of the slot along the axis of the rod is substantially equal to the depth of the cut-out.
  • FIG. 1 is a schematic side view, partly in section, with an aluminum fusion electrolytic cell
  • FIG. 2 is a front view of a lower section of a contact rod portion of an electrolytic cell showing a welded joint of the instant invention.
  • FIG. 3 is a side view in detail, similar to FIG. 2.
  • An electrolytical cell 10 has a tank 11 which like the remaining components of the electrolytic cell need not be shown in detail, since such cells are well known to the expert in the field.
  • the tank 11 contains a molten cryolite electrolyte 12 which contains aluminum oxide in dissolved form.
  • the cryolite electrolyte is covered by a layer of slag 13, above which there is a layer of aluminum oxide 14.
  • the separated liquid aluminum 15 accumulates at the bottom of the cell 10.
  • the electrolytic current is supplied on the cathode side by bars 16 (of which only one is shown in FIG. 1).
  • An anodic current conductor is mounted above the electrolytic cell 10 and carrying the current by contact rods 18 and mounting plates 19 to pre-baked carbon anodes 20 which are immersed in the cryolite electrolyte 12. With the aid of a rod-locking device 21 the contact rods 18 are clamped to the current conductor 17. The contact bars 18 at their lower sections are welded to the mounting plate 19. The weld beads are designated at 22 wherein tension or stress cracks frequently occur.
  • FIGS. 2 and 3 show the manner in which the welded joint between the contact rod 18 and the mounting plate 19 is fashioned in accordance with the present invention, so that tension or stress cracks will neither form during nor after the welding procedures.
  • the welded joint formed in accordance with the present invention is characterized by the fact that at the lower section of the contact-rod there is formed a slit 23 which extends upward vertically in thecenter of the contact rod 18 and is positioned perpendicular to the mounting plate 19. In so doing the welded seam 22 is interrupted along the width 24 ofthe slit 23.
  • a cut-out sec: tion 25 is provided in the mounting plate 19.
  • the slit 23 is suitably milled, or worked in:- another manner, this being done to such a degree that the vertical length of the slit 23 approximately corresponds to the depth of the cut-out section 25 of the mounting plate 19.
  • the mounting plate 19 may have sloping sides 26 at its upperedge, but it is not absolutely necessary.
  • a recessed area 27 at the lower section of the mounting plate 19 may be omitted.
  • an anode support comprising a steel mounting plate and a contact rod of aluminum or copper with its axis in the plane of the plate in which the end of the rod has a diametral slot across it, perpendicular to the plane of the plate, and the plate. and rod arewelded together on both side of the slot, the weld being interruptedby the width of the slot.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Cable Accessories (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)
US81056A 1969-10-24 1970-10-15 Welded joint Expired - Lifetime US3679569A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1587969A CH514682A (de) 1969-10-24 1969-10-24 Schweissverbindung

Publications (1)

Publication Number Publication Date
US3679569A true US3679569A (en) 1972-07-25

Family

ID=4412730

Family Applications (1)

Application Number Title Priority Date Filing Date
US81056A Expired - Lifetime US3679569A (en) 1969-10-24 1970-10-15 Welded joint

Country Status (13)

Country Link
US (1) US3679569A (enrdf_load_stackoverflow)
JP (1) JPS4937602B1 (enrdf_load_stackoverflow)
AT (1) AT303407B (enrdf_load_stackoverflow)
BE (1) BE757944A (enrdf_load_stackoverflow)
CA (1) CA924265A (enrdf_load_stackoverflow)
CH (1) CH514682A (enrdf_load_stackoverflow)
DE (1) DE2052527C3 (enrdf_load_stackoverflow)
FR (1) FR2066483A5 (enrdf_load_stackoverflow)
GB (1) GB1272036A (enrdf_load_stackoverflow)
IS (1) IS874B6 (enrdf_load_stackoverflow)
NL (1) NL7014097A (enrdf_load_stackoverflow)
NO (1) NO133094B (enrdf_load_stackoverflow)
ZA (1) ZA707172B (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005080641A1 (en) * 2004-02-20 2005-09-01 Torvund Stig Current busbar
CN103510117A (zh) * 2013-10-09 2014-01-15 毕峰 爪头可更换的直导电式活动钢爪
CN114211256A (zh) * 2021-12-30 2022-03-22 福建省微柏工业机器人有限公司 一种用于电解铝阳极钢爪的焊接装置及自动焊接方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53137324A (en) * 1977-05-06 1978-11-30 Kubota Ltd Supercharger equipped engine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005080641A1 (en) * 2004-02-20 2005-09-01 Torvund Stig Current busbar
US20090127126A1 (en) * 2004-02-20 2009-05-21 Stig Torvund Current busbar
CN103510117A (zh) * 2013-10-09 2014-01-15 毕峰 爪头可更换的直导电式活动钢爪
CN103510117B (zh) * 2013-10-09 2017-01-25 毕峰 爪头可更换的直导电式活动钢爪
CN114211256A (zh) * 2021-12-30 2022-03-22 福建省微柏工业机器人有限公司 一种用于电解铝阳极钢爪的焊接装置及自动焊接方法

Also Published As

Publication number Publication date
ZA707172B (en) 1971-07-28
IS874B6 (is) 1974-07-02
FR2066483A5 (enrdf_load_stackoverflow) 1971-08-06
IS1953A7 (is) 1971-04-25
AT303407B (de) 1972-11-27
CA924265A (en) 1973-04-10
NL7014097A (enrdf_load_stackoverflow) 1971-04-27
DE2052527B2 (de) 1975-02-27
BE757944A (fr) 1971-04-01
DE2052527C3 (de) 1975-10-23
DE2052527A1 (de) 1971-05-06
GB1272036A (en) 1972-04-26
NO133094B (enrdf_load_stackoverflow) 1975-12-01
JPS4937602B1 (enrdf_load_stackoverflow) 1974-10-11
CH514682A (de) 1971-10-31

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