EP0068165B2 - Brûleur pour découper et/ou dégrossir thermochimiquement des pièces à usiner en acier - Google Patents

Brûleur pour découper et/ou dégrossir thermochimiquement des pièces à usiner en acier Download PDF

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Publication number
EP0068165B2
EP0068165B2 EP82104845A EP82104845A EP0068165B2 EP 0068165 B2 EP0068165 B2 EP 0068165B2 EP 82104845 A EP82104845 A EP 82104845A EP 82104845 A EP82104845 A EP 82104845A EP 0068165 B2 EP0068165 B2 EP 0068165B2
Authority
EP
European Patent Office
Prior art keywords
nozzle
bore
diameter
nozzle bore
burner
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
EP82104845A
Other languages
German (de)
English (en)
Other versions
EP0068165A2 (fr
EP0068165B1 (fr
EP0068165A3 (en
Inventor
Franz Hennecke
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.)
Aute AG Gesellschaft fuer Autogene Technik
Original Assignee
Aute AG Gesellschaft fuer Autogene Technik
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.)
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Publication date
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Application filed by Aute AG Gesellschaft fuer Autogene Technik filed Critical Aute AG Gesellschaft fuer Autogene Technik
Priority to AT82104845T priority Critical patent/ATE25760T1/de
Publication of EP0068165A2 publication Critical patent/EP0068165A2/fr
Publication of EP0068165A3 publication Critical patent/EP0068165A3/de
Application granted granted Critical
Publication of EP0068165B1 publication Critical patent/EP0068165B1/fr
Publication of EP0068165B2 publication Critical patent/EP0068165B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/48—Nozzles
    • F23D14/56—Nozzles for spreading the flame over an area, e.g. for desurfacing of solid material, for surface hardening, or for heating workpieces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/48—Nozzles
    • F23D14/52—Nozzles for torches; for blow-pipes
    • F23D14/54—Nozzles for torches; for blow-pipes for cutting or welding metal

Definitions

  • the invention relates to a burner for thermochemical separation or planing of thick steel workpieces with a thickness between 150 to 600 mm, with a cutting oxygen jet, the burner essentially consisting of a nozzle with a cutting oxygen inlet bore, a nozzle bore and a cutting oxygen outlet bore and there is a nozzle holder.
  • burners which are used for a wide variety of work, e.g. B. Separating thinner, thicker or thickest steel workpieces or for planing narrow joints up to the widest areas of steel workpieces can be used.
  • thermochemical cutting and planing of workpieces made of steel the endeavor has to achieve ever greater performance, i. H. To achieve greater flame speeds, greater flame width, greater flame depth, greater cutting speed and greater cutting thicknesses, led to a large number of burner developments. B. in terms of noise and less harmful emissions, as well as a long life of the nozzles and cheap maintenance played a role.
  • the cutting speeds achieved cannot be regarded as satisfactory; if the reaction location is sufficiently heated by the burner heating and the exothermic heat generated during cutting, the cutting speeds only reach a fraction of the chemical reaction speed despite the greatest oxygen purity. This is due to the fact that the iron oxide skin that forms over the reactive iron always has to be removed by the kinetic energy of the cutting oxygen jet. With regard to the kinetic energy of the cutting oxygen jet, which is obtained from the conversion of the pressure of the supplied oxygen, there are, however, restrictions due to friction and shock losses when the nozzle is narrowed or enlarged, and due to insufficient jet formation.
  • Laval nozzle shapes or approximate designs (AU-B-417 614). These nozzles can only be used with thin material and, apart from the manufacturing outlay for Laval nozzles, are very sensitive to pressure fluctuations in terms of their effectiveness.
  • Another known nozzle embodiment consists in a central oxygen channel which tapers conically to a narrowed section and in turn widens conically from this section to the nozzle outlet (DE-A-2 251 632). In this embodiment too, pressure losses are largely avoided, and the nozzle is only suitable for cutting metal sheets of reduced thickness. It is also known, for manufacturing reasons, to provide sharp-edged shoulders in nozzles with long, narrow bores (DE-C-960 981).
  • Another problem is the formation of the kerf in the workpiece. If the kerf width is too large, a lot of material is lost, which also increases the formation of the beard and increases the amount of rework.
  • the invention is therefore based on the object of making a burner available which, in the case of insensitivity to pressure fluctuations, stands out due to a simple, inexpensive design with a long service life and enables the formation of thin kerfs at a maximum working speed. In this way, the smallest possible beards are created with sharp edges and few pearls on the top, so that little rework is required.
  • FIG. 1 shows a burner in which a nozzle 1 is fastened to a nozzle holder 3 by means of a nozzle screw 2.
  • a shaft tube 5 and a heating gas feed tube 6, a heating oxygen feed tube 7 and a cutting oxygen feed tube 8 are soldered into the nozzle receptacle 4.
  • Heating mixture bores lead from ring channels 9, which are formed between the nozzle holder 3 or 4 and the nozzle 2 stanchions 10 to the nozzle outlet and surround a cutting oxygen nozzle bore 11 with its cutting oxygen outlet bore 12.
  • the cutting oxygen enters the nozzle bore 11 from the shaft tube 8 via a cutting oxygen inlet bore 13.
  • the length I D of the nozzle bore 11 was significantly shortened and at the same time the Diameter d A of the outlet bore 12 is significantly increased.
  • the pressure loss in the nozzle bore could be greatly reduced, which in turn was only possible if the transition 14 from the inlet bore 13 of the nozzle bore 11 was designed such that only a small outlet distance in the nozzle bore 11 was required.
  • the transition 14 from the inlet bore 13 to the nozzle bore 11 consists of an angular constriction 14 and, taking into account the dependence on pressure, nozzle bore diameter d D and nozzle bore length I D, can be rounded off slightly to avoid maximum impact loss.
  • the cylindrically shaped nozzle bore 11 for I D cutting jet of oxygen having a low, not larger than 10 mm is provided to continuous to 0 length, preferably a length of 0.5 to 5 mm is observed.
  • a comparatively small diameter of 4 mm or less is to be provided, with 1.5 mm to 3.6 mm being the preferred range.
  • the outlet bore 12 adjoining the outlet side should have a final outlet diameter dA of 6 mm or less, preferably 3 to 5.4 mm.
  • the length of the outlet cone with diameter depends on the pressure and quantity ratios. It was found that the ratio of the nozzle diameter to the nozzle outlet edge is preferably in the range from 0.5 to 0.8, or there were favorable values with a ratio of the cross sections of the nozzle bore to the nozzle outlet cross section in the range from 0.3 to 0.35 . With such nozzles, a cutting speed of 150 to 250 mm / min could be achieved at an oxygen working pressure of 16 to 20 bar, with a kerf of no more than 6 to 7 mm or 6.5 to 9 mm. For these nozzles, the length I D of the nozzle bore (11) was 3.25 or 0.65 mm with a bore diameter d D of 1.8 or 2.6 mm.
  • FIG. 2 shows a further development of the invention.
  • An outer shaft tube 23 and an inner shaft tube 24 are soldered to the nozzle 22.
  • the chamber 25 surrounded by the inner shaft tube 24 is provided with an oxygen supply nozzle 26, while the intermediate space 27, which is formed by the outer shaft tube 23 and the inner shaft tube 24 arranged concentrically at a distance from one another, is provided with a gas supply nozzle 28.
  • From the space 27 lead to the heating gas bores 29, connecting channels 30, and the heating gas bores 29 are also connected by connecting channels 31 to the oxygen chamber 25, so that a mixture of heating gas and heating oxygen is supplied to the bores 29.
  • a cutting oxygen nozzle bore 32 which opens into the cutting oxygen outlet bore 33, runs from the oxygen chamber 25 in accordance with the previously described nozzle shapes. In this way, a burner is made available which consists of a uniform nozzle part with an integrated holding part with connections.
  • the invention can also be useful for nozzles that are screwed in directly.
  • the shorter nozzle part is provided with a thread for screwing into the holding part below the sealing head and with flats on the foot near the outlet.
  • the threaded nozzle part or a nozzle screw with an attached guide can be provided for secure attachment and thus easier screwing in, the initial nut thread being interrupted in two areas on the circumference and the screw thread starts sharply at the nozzle part.
  • markings on the nozzle part and holding part can be provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Processing Of Solid Wastes (AREA)

Claims (7)

1. Brûleur pour le découpage ou le rabotage ther- mochimiques de pièces d'acier épaisses dont l'épaisseur est comprise entre 150 et 600 mm, au moyen d'un jet d'oxygène de coupe, le brûleur étant constitué essentiellement par une buse (1) comportant un trou d'entrée d'oxygène de coupe (13), un trou de buse (11) et un trou de sortie d'oxygène de coupe (12), ainsi que par un porte-buse (3),
caractérisé en ce que, pour atteindre une perte par à coups, la transition (14), entre le trou d'entrée d'oxygène de coupe (13) et le trou de buse (11), est réalisé sous forme de décrochement à angles vifs,
en ce que, pour diminuer la perte par frottement subséquente, le diamètre (dD) du trou de buse (11) est constant sur une courte longueur (ID), en ce que la sortie de buse (12) faisant suite est sensiblement agrandie,
en ce que l'on a prévu les dimensions suivants : la longueur totale (L) de la buse (1), composée du trou de buse (11) et du trou de sortie d'oxygène de coupe, présente les dimensions suivantes :
L = 24 à 30 mm pour un diamètre du trou de buse (dD) * 3 mm,
L = 28 à 40 mm pour un diamètre du trou de buse (dD) ≦ 4 mm,

la longueur de sortie (IA) étant
de 8 à 18 mm pour un trou de buse (dD) ≦ 3 mm et de 12 à 24 mm pour un trou de buse (dD) ≦ 4 mm et,
en ce que le trou de buse présente une forme cylindrique sur sa longueur comprise entre 0,5 et 10 mm et est pourvu d'un diamètre compris entre 1,5 et 3,6 mm.
2. Brûleur selon la revendication 1, caractérisé en ce que l'évasement est conique et est compris dans une plage allant de 5 à 10°, et est de préférence égal à 70.
3. Brûleur selon l'une des revendications 1 ou 2, caractérisé en ce que la transition (14) à arêtes vives est disposée au début du trou de buse (11).
4. Brûleur selon la revendication 3, caractérisé en ce que la transition (14) présente un léger arrondi.
5. Brûleur selon l'une des revendications 1 à 4, caractérisé en ce que la buse (1) possède un trou d'entrée (13) rallongé dont le diamètre est sensiblement plus grand que celui du trou de buse (11).
6. Brûleur selon l'une des revendications 1 à 5, caractérisé en ce que la buse (1, 22) pourvue d'un filetage est vissée dans le porte-buse pourvu d'un filet femelle correspondant et est par conséquent interchangeable.
7. Brûleur selon l'une des revendications 1 à 6, caractérisé en ce que, pour être vissée dans le porte-buse (3), la buse (1) est pourvue, en dessous de la tête assurant l'étanchéité, d'un filetage et, au pied, de surfaces de prise pour clefs de serrage.
EP82104845A 1981-06-05 1982-06-03 Brûleur pour découper et/ou dégrossir thermochimiquement des pièces à usiner en acier Expired - Lifetime EP0068165B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82104845T ATE25760T1 (de) 1981-06-05 1982-06-03 Brenner zum thermochemischen trennen und/oder abholen von werkstuecken aus stahl.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3122404 1981-06-05
DE19813122404 DE3122404A1 (de) 1981-06-05 1981-06-05 Brenner zum thermochemischen brennen und/oder abhobeln von werkstuecken aus stahl

Publications (4)

Publication Number Publication Date
EP0068165A2 EP0068165A2 (fr) 1983-01-05
EP0068165A3 EP0068165A3 (en) 1983-09-07
EP0068165B1 EP0068165B1 (fr) 1987-03-04
EP0068165B2 true EP0068165B2 (fr) 1994-09-28

Family

ID=6134032

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82104845A Expired - Lifetime EP0068165B2 (fr) 1981-06-05 1982-06-03 Brûleur pour découper et/ou dégrossir thermochimiquement des pièces à usiner en acier

Country Status (3)

Country Link
EP (1) EP0068165B2 (fr)
AT (1) ATE25760T1 (fr)
DE (2) DE3122404A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0097883B1 (fr) * 1982-06-26 1987-09-16 AUTE Gesellschaft für autogene Technik mbH Tuyère courte en une seule pièce pour un brûleur pour le coupage ou le rabotage thermo-chimique
DE59508996D1 (de) * 1995-12-20 2001-03-01 Aute Autogene Tech Quer- und Längsteileinrichtung zum Sauerstoffbrennschneiden von heissen und kalten Strängen
EP1632303A1 (fr) * 2004-09-02 2006-03-08 Aute AG Gesellschaft für autogene Technik Chalumeau de découpage de pièces en acier chaud ou froid ayant une meilleure séparation rapide et douce de l'oxygène avec une maintenance et une utilisation de l'oxygène sous pression améliorées
CN107116479B (zh) * 2017-05-15 2018-11-20 四川大学 用于光学元件加工的数控湿法化学刻蚀组合喷嘴

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU417614B2 (en) * 1967-03-22 1971-10-01 Iwatani & Company Limited Flame cutting method and apparatus
JPS5236107B2 (fr) * 1971-10-27 1977-09-13
GB1497793A (en) * 1974-10-24 1978-01-12 Boc International Ltd Cutting nozzles

Also Published As

Publication number Publication date
DE3275582D1 (en) 1987-04-09
DE3122404A1 (de) 1983-01-05
EP0068165A2 (fr) 1983-01-05
EP0068165B1 (fr) 1987-03-04
ATE25760T1 (de) 1987-03-15
EP0068165A3 (en) 1983-09-07

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