摘要:
A gas flow safety device, such as a flashback arrestor, with flow indication includes a main body (100) and a safety element (220). The main body (100) has a flow capacity and is configured to direct a flow of gas from an inlet (240) to an outlet (250). The safety element (220) is disposed within the main body (100) and prevents at least one of flashbacks and reverse flows of gas. The flashback arrestor may also include at least one of: an indicator assembly (180) that automatically provides an indication when the flow capacity of the main body (100) diminishes by a predetermined amount; and a movable internal mechanism (150) that causes the apparatus to provide an indication when the flow capacity of the main body (100) diminishes by the predetermined amount.
摘要:
The invention relates to a method for welding with a laser beam, using a welding nozzle comprising: a nozzle body (1) having an axis and including at least an upper surface (6), a lower surface (7) and a peripheral wall (5); an axial cavity (2) extending between the upper (6) and lower (7) surfaces of the nozzle body (1) so as to define an outer channel (2) recessed from the surface of said peripheral wall (5); and a plurality of inner passages (3) drilled through the nozzle body (1) between the upper and lower surfaces (6, 7). The laser welding method of the invention provides a dynamic gas jet mechanically interacting with the molten metal bath, and further enables better control of the bath hydrodynamic flows, and thus better laser-welding efficiency.
摘要:
A contact tip (120) for a welding torch in accordance with the present invention includes an elongated, generally cylindrical body (122) having a front contact end (124) and an opposite rear retaining end (126). A central aperture is defined by an inner wall of the body (122). The aperture extends through the body (122) from an opening at the rear retaining end (126) to an opening at the front contact end (124). The aperture has a front portion (130) and a wider diameter portion (132) adjacent the front portion (130). The front portion (130) generally has a length that is shorter than a length of the wider diameter portion (132). A consumable electrode wire fed through the aperture contacts the inner wall in the front portion (130) but does not contact the inner wall in the wider diameter portion (132).
摘要:
A nozzle for processing machinery, wherein a hard ceramics coating is formed on the surface of the base metal of the nozzle for processing the machinery to prolong the service life thereof. Since the hard ceramics coating is formed on the surface of the base metal of the nozzle for the processing machinery, the nozzle for processing the machinery is hard to be scratched on the surface thereof and highly resistant to heat. Thus, service life can be prevented from being shortened due to the occurrence of scratch by the contact thereof with a warped work during processing and the deformation thereof by heat in the nozzle for processing the machinery to realize an increased service life.
摘要:
Durch in Druckstufen geplante und entwickelte Herstellung von Schneiddüsen (3) für die Bedürfnisse von Stahlwerken mit neuartigem Schneidkanal und ergänzenden Verbesserungen auch an den Schneidbrennern (1-3) können sicherere, vielseitigere und optimale Schneidarbeiten durchgeführt werden, auch wenn die Schneidüse (3) in einer anderen Druckstufe als geplant eingesetzt wird. Die Qualität der genauer erfassten Abmessungen bei besonders guten Ausführungen und deren entsprechende Umsetzung in eine Produktion erhöht Schneidgeschwindigkeiten und Standzeiten der Schneiddüsen (3).
摘要:
Die Düse (1) dient zum Schneiden oder Schweißen, insbesondere zum Laserschneiden oder -schweißen oder zum Plasmaschneiden oder -schweißen oder zum MIG/MAG-Schutzgasschweißen. Sie enthält einen Grundkörper (7) und eine auf dem Grundkörper (7) angeordnete Verschleißschutzschicht (2) aus einem Schutzschicht-Material, das einen Metall-Materialanteil und einen Nichtmetall-Materialanteil umfasst. Der Metall-Materialanteil enthält mindestens eines der Metalle Aluminium, Chrom und Titan. Der Nichtmetall-Materialanteil enthält mindestens eines der Elemente Stickstoff, Sauerstoff, Kohlenstoff und Bor, insbesondere in Form eines Nitrids, Oxynitrids, Carbonitrids oder Borids.
摘要:
La buse (8) est constituée d'un ensemble concentrique d'un insert central (9) aisément interchangeable, d'un insert intermédiaire (10) et d'un bloc de montage périphérique (11). L'insert intermédiaire (10) définit intérieurement et extérieurement des couronnes de conduits de chauffe intérieure (40) et extérieure (50) débouchant autour du conduit central profilé d'oxygène de coupe (12) formé dans l'insert central (9), et il comporte, à son extrémité arrière, au moins deux portées annulaires concentriques transversales (15, 16) coopérant, en configuration assemblée, en appui étanche avec une face d'extrémité transversale annulaire (5) dans le corps de chalumeau (1) sur lequel est rapportée la buse (8). Application notamment à l'oxycoupage à chaud ou le refendage à froid.
摘要:
A multi-part oxy-fuel cutting tip has mixture outlet passages formed by swaging the tip skirt to form grooves. The grooves then cooperate with the tip core to form the outlet passages when the skirt is placed over the tip core. Oppositely directed circumferential inlet passages for the preheat oxygen and fuel promote rapid mixing while producing a non-rotating mixture flow. In addition, the sectional areas of the outlet passages decrease in the flow direction. These features promote the rapid creation of a laminar mixture flow.