EP0000379B1 - Verfahren zum Lichtbogenbolzenschweissen mit Hubzündung, sowie Schweisspistole zur Durchführung dieses Verfahrens. - Google Patents

Verfahren zum Lichtbogenbolzenschweissen mit Hubzündung, sowie Schweisspistole zur Durchführung dieses Verfahrens. Download PDF

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Publication number
EP0000379B1
EP0000379B1 EP78100321A EP78100321A EP0000379B1 EP 0000379 B1 EP0000379 B1 EP 0000379B1 EP 78100321 A EP78100321 A EP 78100321A EP 78100321 A EP78100321 A EP 78100321A EP 0000379 B1 EP0000379 B1 EP 0000379B1
Authority
EP
European Patent Office
Prior art keywords
welding
stud
powder
protective
storage container
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
Application number
EP78100321A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0000379A1 (de
Inventor
Karl R. Grassmugg
Friedrich Dörhöfer
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.)
Linde GmbH
Original Assignee
Linde GmbH
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 Linde GmbH filed Critical Linde GmbH
Publication of EP0000379A1 publication Critical patent/EP0000379A1/de
Application granted granted Critical
Publication of EP0000379B1 publication Critical patent/EP0000379B1/de
Expired legal-status Critical Current

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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
    • B23K9/20—Stud welding
    • B23K9/201—Stud welding of the extremity of a small piece on a great or large basis
    • B23K9/202—Stud welding of the extremity of a small piece on a great or large basis by means of portable equipment, e.g. stud welding gun

Definitions

  • the invention relates to a method for arc stud welding with drawn arc, in which a protective medium is supplied to the welding point, and a welding gun for carrying out this method.
  • a stud welding gun (Gm 76 33 143), which has a bell-like part at its front free end, which is designed such that protective gas supplied to the part via an inlet can be fed to the point at which a stud is welded onto the base metal shall be.
  • the welding point is to be protected from the outside atmosphere by a protective gas flow.
  • the channels guiding the shielding gas are oriented towards the welding point, the relatively large distance between the channels and the welding point and the use of a gaseous protective medium have an adverse effect, since the weld pool runs and an uneven weld connection can occur.
  • the method described is mainly suitable for welding bolts of small or medium diameter, since the disadvantages described occur when welding bolts of larger diameter.
  • US Pat. No. 2,491,479 describes a method for arc stud welding with drawn arc ignition.
  • a protective gas is introduced into a sleeve surrounding the welding area.
  • the sleeve is made of ceramic material and has the task of holding the weld metal together.
  • an arc stud welding device in which a protective medium is brought into the area of the welding point.
  • a welding powder is used as a protective medium.
  • the invention has for its object to develop a method with which bolts of larger diameter can be welded safely and with short welding times.
  • This object is achieved in that a welding powder and a protective gas are passed into the area of the weld.
  • the supply of a welding powder has the same purpose as the supply of a protective gas, but the protective and shaping effect is improved by the inventive method with a welding powder as a protective medium.
  • the welding powder surrounding the welding point shields this point from the atmosphere, thereby preventing reactions of the welding bath with atmospheric oxygen.
  • a safe limitation of the arc and an improved weld pool protection are advantageously achieved. In this way, even larger diameter bolts can be welded without the use of a ceramic ring.
  • the method according to the invention also saves accessory costs for the clamping elements into which the ceramic rings are inserted. Since the time-consuming application and removal of the ceramic ring can be omitted, labor costs also decrease.
  • an inert gas is advantageously used as the protective medium in addition to the welding powder.
  • a protective gas as a further protective medium makes it possible to match the protective medium to the materials to be welded by selecting certain protective gases or welding powder and by varying the quantity ratio of protective gas to welding powder, and thus to achieve an optimal weld connection.
  • the stud to be welded can advantageously at least partially have a coating of welding powder. With this method it is possible to bring the welding powder into the area of the welding point in a highly economical and simple manner. In addition, the welding process is simplified because there is no need for a separate feed system or the use of a ceramic ring. Since the covering of the bolts is easily damaged during transport, this method is only useful and can be used with advantage if the transport of the bolts is not necessary.
  • a welding gun for carrying out the method has a supply system for the protective medium which is connected to a storage container.
  • the protective medium passed through the feed system is fed exactly at the level of the melting stud end, i.e. in the immediate vicinity of the weld pool.
  • the outlet opening is oriented towards the stud, so that complete and effective shielding of the weld pool is ensured.
  • the feed system consists of a storage container for powder formed by two walls arranged at a distance from one another and concentrically to the bolt axis, and of an intermediate space between the bolt and the bolt holder and the storage container for the powder.
  • the storage container for welding powder via which the welding powder is fed to the welding area, can be connected to a storage container for a protective gas.
  • a protective gas can be supplied to the area of the welding point.
  • the main welding powder used is submerged arc welding or magnetizable powders.
  • protective gas e.g. Argon, carbon dioxide and the aforementioned gases containing mixed gases (Corgon range) in question.
  • the design of the feed system according to the invention is adapted to the particular shape of the bolt.
  • the cross section of the bolt and the outlet opening are similar to one another, so that the distance between the bolt and the outlet opening is constant along the entire circumference of the bolt and a uniform supply and distribution of the protective medium is ensured.
  • the stud and the stud holder are surrounded by the walls of the feed system with the formation of a gap, the gap being connected to a storage container for protective gas.
  • a further protective gas can be supplied to the weld pool via the above-mentioned space and the protective and limiting effect of the protective medium can thus be enhanced.
  • the part of a welding gun for arc stud welding with drawn ignition shown in FIG. 1 consists of the gun base 8, the stud holder 4 and the feed system 1.
  • a stud 5 to be welded to the workpiece 11 is carried by the stud holder 4, the stud 5 being carried over the stud holder 4 is connected to a lifting device, not shown.
  • the feed system 1 itself consists of the two walls 2 and 3, which surround the bolt 5 concentrically, and the outlet opening 7. The distance between the outlet opening 7 and the bolt 5 is constant at all points and thus enables the zifty supply of protective media with the described advantages.
  • the feed system 1 is connected to a reservoir 9 for the welding powder and / or to a reservoir 10 for protective gas.
  • the walls 2, 3 of the feed system 1 surround the bolt 5 and the bolt holder 4 at a distance, which creates an intermediate space 12.
  • This is connected on the one hand to a storage container 6 for protective gas and on the other hand has an opening towards the workpiece, the shape of which is determined by the cross section of the bolt and the cross section of the outlet opening 7.
  • the consumption of protective gas or welding powder can be made economical in that the welding powder and the protective gases are only supplied immediately before a welding process.
  • the face of the bolt and the workpiece 11 melt.
  • the bolt 5 is dipped into the weld pool with pressure and the power source is switched off.
  • the welding powder surrounding the weld pool and the protective gas form the melt, which is pushed away to the side, into a bulge and perform the protective and limiting tasks described.
  • FIGS. 2 and 3 show bolts to which welding powder 13, 14 has been attached directly by pressing, dipping or caulking, as is customary with stick electrodes.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Arc Welding In General (AREA)
EP78100321A 1977-07-09 1978-07-06 Verfahren zum Lichtbogenbolzenschweissen mit Hubzündung, sowie Schweisspistole zur Durchführung dieses Verfahrens. Expired EP0000379B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2731130 1977-07-09
DE19772731130 DE2731130A1 (de) 1977-07-09 1977-07-09 Lichtbogenbolzenschweissen mit hubzuendung

Publications (2)

Publication Number Publication Date
EP0000379A1 EP0000379A1 (de) 1979-01-24
EP0000379B1 true EP0000379B1 (de) 1981-01-07

Family

ID=6013572

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78100321A Expired EP0000379B1 (de) 1977-07-09 1978-07-06 Verfahren zum Lichtbogenbolzenschweissen mit Hubzündung, sowie Schweisspistole zur Durchführung dieses Verfahrens.

Country Status (8)

Country Link
EP (1) EP0000379B1 (es)
AT (1) AT374393B (es)
AU (1) AU518804B2 (es)
BR (1) BR7804410A (es)
DE (1) DE2731130A1 (es)
ES (1) ES471522A1 (es)
GR (1) GR65021B (es)
ZA (1) ZA783909B (es)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60221181A (ja) * 1984-04-18 1985-11-05 Nippon Suichiyuu Sagiyou:Kk 水中用スタッド溶接銃
CN105478972A (zh) * 2014-09-16 2016-04-13 南京理工大学 一种基于药皮自保护的螺柱焊方法
CN108247185A (zh) * 2018-02-09 2018-07-06 阿美科福斯特惠勒动力机械有限公司 一种新型螺柱气体保护焊枪头

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2315502A (en) * 1942-07-18 1943-04-06 John D Crecca Subaqueous end-welding device
US2413370A (en) * 1944-05-24 1946-12-31 Hollup Corp Welding stud
US2491479A (en) * 1948-11-12 1949-12-20 Dash Edward Arc welding of studs
DE921823C (de) * 1951-12-23 1954-12-30 Siemens Ag Verfahren zum Aufschweissen von Stiften, Schrauben, Bolzen od. dgl. auf ein Werkstueck mittels Lichtbogen
GB795481A (en) * 1954-11-15 1958-05-21 Air Reduction Stud welding
GB794457A (en) * 1955-02-11 1958-05-07 British Oxygen Co Ltd Improvements in or relating to stud welding
DE1109803B (de) * 1960-03-26 1961-06-29 Steinmueller Gmbh L & C Mehrfach-Bolzenschweissgeraet
FR1374315A (fr) * 1961-06-23 1964-10-09 Biraghi Procédé de soudage électrique de protubérances sur une pièce métallique et dispositif pour la mise en oeuvre de ce procédé
US3736401A (en) * 1970-07-09 1973-05-29 Trw Inc Through deck welding
US3989920A (en) * 1975-05-15 1976-11-02 Massachusetts Institute Of Technology Underwater stud welding gun

Also Published As

Publication number Publication date
ZA783909B (en) 1979-07-25
ES471522A1 (es) 1979-10-01
AU518804B2 (en) 1981-10-22
GR65021B (en) 1980-06-13
AT374393B (de) 1984-04-10
DE2731130A1 (de) 1979-01-25
BR7804410A (pt) 1979-03-06
EP0000379A1 (de) 1979-01-24
ATA461478A (de) 1983-09-15
AU3791278A (en) 1980-01-17

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