WIPO logo
Mobile | Deutsch | Español | Français | 日本語 | 한국어 | Português | Русский | 中文 | العربية |
PATENTSCOPE

Search International and National Patent Collections
World Intellectual Property Organization
Search
 
Browse
 
Translate
 
Options
 
News
 
Login
 
Help
 
Machine translation
1. (WO1981002862) NOZZLE WITH A PLURALITY OF CHANNELS,PARTICULARLY BURNER NOZZLE FOR A WELDING APPARATUS AND THE LIKE AND MANUFACTURING METHOD THEREOF
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1981/002862    International Application No.:    PCT/DE1980/000039
Publication Date: 15.10.1981 International Filing Date: 01.04.1980
IPC:
B22F 5/10 (2006.01), C22C 1/04 (2006.01), F23D 14/52 (2006.01)
Applicants:
Inventors:
Priority Data:
DE80/00039 01.04.1980 WO
Title (EN) NOZZLE WITH A PLURALITY OF CHANNELS,PARTICULARLY BURNER NOZZLE FOR A WELDING APPARATUS AND THE LIKE AND MANUFACTURING METHOD THEREOF
(FR) AJUTAGE A PLUSIEURS CANAUX, EN PARTICULIER AJUTAGE DE BRULEUR POUR APPAREIL DE SOUDAGE AUTOGENE ET SIMILAIRES ET PROCEDE DE FABRICATION DE L"AJUTAGE
Abstract: front page image
(EN)The nozzle having a plurality of channels is particularly appropriate as a burner nozzle for welding apparatuses, cutting torches or heating burners. The nozzle (26") is obtained first by compression of a mixture of metal powders about mandrels used for forming the channels. The body of the nozzle is then sintered. In order to obtain smooth walls for the channels, the cross-section area is reduced after sintering, and during this reduction sizing mandrels (35, 36, 37, 38, 39) are inserted into the channels. To obtain the reduction of the cross-section area, the sintered bodies (26) are pressed through a reduction die (28) having a bore (34) comprising a reduction section (34b). During the reduction of the cross-section area, the material is pressed under the effect of the decrease of volume of the pores and is configured to the shape of the sizing mandrels (35 to 39). The manufacture with the use of powders allows to obtain an optimum shape for the channels from the point of view of the flow. The channels may be very thin. The waste ratio is substantially lower than that obtained with the manufacturing process currently used wherein the channels are obtained by boring.
(FR)L"ajutage a plusieurs canaux convient en particulier en tant qu"ajutage de bruleur pour des appareils de soudage autogene, des chalumeaux de decoupage ou des bruleurs de chauffage. L"ajutage (26") est obtenu d"abord par compression d"un melange de poudres metalliques autour de mandrins servant a la formation des canaux. Le corps de l"ajutage est ensuite fritte. Afin d"obtenir des parois lisses des canaux, on effectue, a la suite du frittage, une reduction de la section transversale, au cours de laquelle des mandrins de calibrage (35, 36, 37, 38, 39) sont introduits dans les canaux. Pour obtenir la reduction de la section transversale, les corps frittes (26) sont presses a travers une matrice de reduction (28) presentant un alesage (34) comportant un troncon de reduction (34 b). Pendant la reduction de la section transversale, le materiau est comprime sous l"effet de la diminution du volume des pores et epouse la forme des mandrins de calibrage (35 a 39). La fabrication a partir de poudres permet d"obtenir une forme des canaux optimale du point de vue de l"ecoulement, Les canaux peuvent etre tres minces. Le taux de rebut est sensiblement inferieur a celui obtenu avec le procede de fabrication couramment utilise dans lequel les canaux sont obtenus par alesage.
Designated States:
Publication Language: German (DE)
Filing Language: German (DE)