EP1579744A2 - Buse pour un dispositif de soudure par faisceau d'electrons - Google Patents

Buse pour un dispositif de soudure par faisceau d'electrons

Info

Publication number
EP1579744A2
EP1579744A2 EP03813508A EP03813508A EP1579744A2 EP 1579744 A2 EP1579744 A2 EP 1579744A2 EP 03813508 A EP03813508 A EP 03813508A EP 03813508 A EP03813508 A EP 03813508A EP 1579744 A2 EP1579744 A2 EP 1579744A2
Authority
EP
European Patent Office
Prior art keywords
nozzle
base body
nozzle according
head
electron beam
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Withdrawn
Application number
EP03813508A
Other languages
German (de)
English (en)
Inventor
Karl-Heinz Brosig
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.)
3A Composites International AG
Original Assignee
Alcan Technology and Management Ltd
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 Alcan Technology and Management Ltd filed Critical Alcan Technology and Management Ltd
Publication of EP1579744A2 publication Critical patent/EP1579744A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/26—Plasma torches
    • H05H1/32—Plasma torches using an arc
    • H05H1/34—Details, e.g. electrodes, nozzles
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/26—Plasma torches
    • H05H1/32—Plasma torches using an arc
    • H05H1/34—Details, e.g. electrodes, nozzles
    • H05H1/3478—Geometrical details

Definitions

  • the invention relates to a nozzle made of metallic material for a device for electron beam welding, containing at least two pressure stages, the nozzle having a base body to which a nozzle head is attached with a tubular nozzle socket.
  • Such a device can be found, for example, in the document relating to DE 299 02 168 U1. It describes a pressure stage system for such a welding device in pressure ranges of at least 10 4 m bar with at least two cascading stages; these pressure stages are formed by two coaxial pressure pipes, each with a nozzle at one end, the axial distance between which should be as short as possible, but not so narrow that the suction cross section is too constricted for the rough vacuum area.
  • the inner pressure tube offers an inner nozzle, from which the electron beam exits into the rough vacuum and then through the further nozzle into the ambient atmosphere.
  • the inner nozzle consists of two copper parts welded together, namely a disc-like base body and a nozzle head with a conical surface. If the weld seam is leaky from the start or if it is damaged by a faulty beam deviation that occurs in the welding process, the cooling water under the seam enters a vacuum area of the system and places it and the vacuum pump under water. In the simple case, this results in a plant shutdown lasting several hours, in the worse case, however significant damage to the connected vacuum pumps.
  • the nozzle head and the rear or base body are each formed from copper and / or a copper alloy and screwed together, so that a deflected electron beam still hits the inner nozzle but does not cause water to penetrate.
  • a particular advantage is that the parts are easier to clean and can be replaced individually if defects occur. This concept is also inexpensive to manufacture.
  • the axial nozzle socket of the nozzle is provided with an external thread and is designed to be screwable with an axial internal thread of the base body.
  • the internal thread of the base body should be arranged in a cylindrical base molding of the base body.
  • a radial bead is formed on the nozzle neck of the nozzle head at a distance from the rear face thereof as a stop for the base body, and the side face of the radial bead which is parallel to the rear face of the nozzle head and points away from it should be designed as a sealing face. It has proven to be advantageous to surround the sealing surface of the radial bead, at least partially, with a recess in the abutting end surface of the base body.
  • the nozzle neck of the nozzle head should also be encompassed by at least one recess in the rear surface of the nozzle head.
  • a grooved ring with circumferential grooves protrudes.
  • the outside of the nozzle should have a deposit-repellent coating, in particular be chrome-plated, in order to reduce the adherence of welding residues.
  • the inlet opening of the nozzle is at least partially formed like a funnel for the electron beam, wherein the angle between the center axis of ⁇ the nozzle and the wall of the inlet opening preferably forms an angle between 0 ° and 45 °, particularly preferably between 5 ° and 30 °, in particular between 10 ° and 20 °.
  • the inlet opening is formed within the proposed angular limits, this focusing effect can be particularly strong. Not only the suggested values but also all intermediate values are suitable as conceivable range limits (both upwards and downwards).
  • the nozzle has an inlet opening for the electron beam has a curved entrance area at least in certain areas, preferably a radial entrance area, particularly preferably with a radius of curvature between 1 mm and 5 mm, in particular between 2 mm and 4 mm. Improved beam focusing can again be achieved through the inlet opening curved in this way.
  • a radial entrance area at least in certain areas, preferably a radial entrance area, particularly preferably with a radius of curvature between 1 mm and 5 mm, in particular between 2 mm and 4 mm.
  • Improved beam focusing can again be achieved through the inlet opening curved in this way.
  • other group shapes such as in particular parabolic, hyperbolic, ellipsoidal or other sections of curved curves, can also be used.
  • all other values can also advantageously be used.
  • FIG. 1 shows a cross section through a pressure stage for electron beam welding with an inner nozzle
  • Fig. 3 a simplified - enlarged schematic sketch of Fig. 2;
  • a pressure stage 10 for an electron beam welding system (not shown further) has an inner pressure tube 12 with an inner diameter d of approximately 42 mm and, coaxially with its tube axis A, an outer pressure tube 16; the radial width of the tube gap 20 is marked with a.
  • an annular pressure stage holder 22 is provided, which rests on the two pressure tubes 12, 16.
  • a - also coaxially arranged - cone 24 which crosses that tube axis A with an end plate 25.
  • a separating cone 28 is located on the inside of this cover cone 24 at a short distance b - forming a cone interior 26 assigned the same contour, which also contains an end plate 29.
  • an outer nozzle 32 which, at an axial distance c of approximately 10 mm, is opposed by an inner nozzle 34 of length h of approximately 57.5 mm, which meets the mouth edge 14 of the inner pressure tube 12 seated.
  • the outer pressure tube 16 is attached to water, working and vacuum feeds, which cannot be seen in the drawing, and forms a shield against the atmosphere from the rough vacuum region prevailing in it or the tube space 20.
  • This outer pressure tube 16 is preferably extruded from an AlMgSi alloy.
  • the inner nozzle 34 has a nozzle head 36 with a central ring section 38 of height i of 6 ' mm and of the diameter di * of 42 mm, of which a cone body 44, covered by a hard chrome surface, is on the one hand in the flow direction x with a front surface 46 of the diameter e of 9 mm which crosses the longitudinal axis M of the inner nozzle 34.
  • This is the geometric location of the mouth 48 of an axial channel 50, which tapers conically towards that mouth 48 of diameter ei of 1.5 mm.
  • a collar 66 of height ni of 13 mm with phase edge 67 is screwed onto the nozzle connection 56 with the bottom surface 68 of a rear or base body 70 of the inner nozzle 34.
  • Axially protruding from the base body 70 is a shaped piece 80 with a cross-section, in which the axial channel 50, which conically extends from its mouth 48 and its diameter ei from 1.5 mm to the diameter e 2 from 5 mm on the end face 64 of the nozzle socket 56 forms a funnel-shaped channel end 51, the wall 52 of which delimits an angle w of 60 ° with a final diameter e 3 of approximately 20 mm.
  • a wrench can be attached to that bent fitting 80.
  • the outer surface 42 is provided by hard chrome plating with a coating 43 made of chrome or a chrome alloy. This prevents (or reduces) the adherence of welding residues or other particles, which are inevitably sucked in from the outside due to the vacuum in the nozzle and which can lead to the nozzle becoming blocked over time.
  • FIG. 4 shows an axial length t of 43 mm of the nozzle head 36 with a length ii of 16 mm of the cone body 44, from FIG. 5 a length ti of the base body 70 of 23.5 mm and its diameter d 2 of 39 mm.
  • FIG. 6 The top view of FIG. 6 on the end face 82 of the shaped piece 80 of the base body 70 shows the cross-sectional shape of this shaped piece 80 with two parallel tangential faces 84 and the shape of the funnel-shaped channel end 51. Otherwise, ring-like depressions in the rear surface 40 of the nozzle head 36 are indicated in FIG. 4 by contours 86.
  • the opening angle v between the longitudinal axis M of the base body 70 and the wall 52 of the funnel-shaped channel end 51 is advantageously between 0 ° and 45 °, particularly preferably between 5 ° and 30 °, ideally between 10 ° and 20 °.
  • the relatively pointed design of the funnel-shaped channel end 51 results in electron beam focusing, so that a larger proportion of the electron beam incident in the nozzle emerges from it again.
  • the relatively acute-angled design of the funnel-like channel end 51 the power loss density of the electron beam per unit area of the wall 52 is lower, so that the heat dissipation performance of the material can be lower.
  • the inlet opening 88 has a rounding 92 between the wall 52 and the nut-side end face 90.
  • this rounding 92 is designed as a circular section.
  • the radius r of the rounding 92 is preferably 1 mm to 5 mm, particularly preferably 2 mm to 4 mm, it also being possible for all other numerical values to function as an interval limit.
  • the provided rounding 92 brings about a further improved beam focusing of the incident electron beam.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Geometry (AREA)
  • Welding Or Cutting Using Electron Beams (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Nozzles (AREA)

Abstract

L'invention concerne une buse en matériau métallique destinée à un dispositif de soudure par faisceau d'électrons. La buse (34) selon l'invention présente un corps d'embase ou arrière (70) auquel est raccordée une tête de buse (36) au moyen d'un manchon de buse tubulaire (56). L'invention est caractérisée en ce que la tête de buse (36) ainsi que le corps d'embase (70) sont constitués d'un alliage en cuivre et sont vissés entre eux. Selon un mode de réalisation préféré de l'invention, le manchon de buse axial (56) est pourvu d'un filetage extérieur (62) et peut être vissé dans un filetage intérieur axial (76) du corps d'embase (70). En outre, le filetage intérieur (76) du corps d'embase (70) est placé de préférence dans un évidement d'embase cylindrique (74) du corps d'embase (70).
EP03813508A 2002-12-20 2003-12-15 Buse pour un dispositif de soudure par faisceau d'electrons Withdrawn EP1579744A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10261253A DE10261253B4 (de) 2002-12-20 2002-12-20 Düse für eine Vorrichtung zum Elektronenstrahlschweißen
DE10261253 2002-12-20
PCT/CH2003/000815 WO2004056523A2 (fr) 2002-12-20 2003-12-15 Buse pour un dispositif de soudure par faisceau d'electrons

Publications (1)

Publication Number Publication Date
EP1579744A2 true EP1579744A2 (fr) 2005-09-28

Family

ID=32519418

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03813508A Withdrawn EP1579744A2 (fr) 2002-12-20 2003-12-15 Buse pour un dispositif de soudure par faisceau d'electrons

Country Status (4)

Country Link
EP (1) EP1579744A2 (fr)
AU (1) AU2003303157A1 (fr)
DE (1) DE10261253B4 (fr)
WO (1) WO2004056523A2 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7304888A (fr) * 1973-04-09 1974-10-11
DE4120791A1 (de) * 1991-06-24 1993-01-14 Verkehrswesen Hochschule Anordnung zum oberflaechenbehandeln metallischer werkstuecke
US5951886A (en) * 1997-12-23 1999-09-14 Ptr Precision Technologies Apparatus for electron beam welding at atmospheric pressure
FR2774548B1 (fr) * 1998-02-02 2000-03-03 Soudure Autogene Francaise Ensemble tuyere/porte-tuyere pour torche a plasma
DE19904948C2 (de) * 1998-05-16 2002-02-28 Dilthey Ulrich Druckstufensystem für eine Vorrichtung zum Elektronenstrahlschweißen in Druckbereichen >10 hoch-4mbar

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004056523A2 *

Also Published As

Publication number Publication date
DE10261253A1 (de) 2004-07-22
AU2003303157A8 (en) 2004-07-14
WO2004056523A3 (fr) 2004-08-19
AU2003303157A1 (en) 2004-07-14
DE10261253B4 (de) 2005-02-24
WO2004056523A2 (fr) 2004-07-08

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