Abstract:
Verfahren zur Laserbearbeitung einer Innenfläche von aus einer Matrixlegierung bestehenden Hohlkörpern mit rotationssymmetrischer Zylinderachse, wobei unter ortsfest gehaltenem Hohlkörper mit einer drehbaren Sonde ein Strahlfleck auf der Innenfläche erzeugt und darauf in einem kontinuierlichen Förder- und Schutzgas Legierungspulver aufgebracht wird. Während der Drehung der Sonde wird diese gleichzeitig entlang der Zylinderachse verschoben, das Legierungspulver im Strahlfleck aufgeschmolzen und in einer Tiefe von 0,2 bis 2 mm einlegiert. Eine Vorrichtung zur Durchführung des Verfahrens umfaßt eine stabförmige Sonde 1, in der zusammen mit einer Zuführung von Legierungspulver in einem Förder- und Schutzgas eine Laserstrahlführung 2 angeordnet ist, die einen Laserlichtstrahl 3 über ein kollimierendes Linsensystem 4 auf einen im Sondenkopf ausgebildeten Umlenkspiegel 5 wirft, einen an der Sonde angeordneten Drehantrieb für den Abschnitt einer Pulverausbringdüse und einer Laserstrahlausbringeinrichtung, die im Reflektionswinkelbereich des Umlenkspiegels angeordnet ist, eine axiale Bewegungseinrichtung der Sonde 1 sowie einen teleskopischen Antrieb für den Abschnitt einer Pulverausbringdüse und für die Laserstrahlausbringeinrichtung.
Abstract:
Verfahren zum Beschichten eines insbesondere aus einer Aluminium-Legierung bestehenden Bauteils (2) einer Brennkraftmaschine, insbesondere eines Brennkraftmaschinen-Zylinders, mit Silicium durch einen Laserstrahl (10), wobei ein Aluminium-Silicium-Pulver in Form eines Pulverstrahls (11) mittels einer geeigneten, ähnlich einer beim bekannten Plasmaspritzen Verwendung findenden Pulverfördereinrichtung in Zusammenwirken mit dem Laserstrahl (10) von der festen in die schmelzflüssige Phase, in welcher Silicium vollständig im Aluminium aufgelöst ist, umgewandelt und auf die Bauteil-Oberfläche (2') in Form feiner Tröpfchen als Schichtmaterial (9) aufgetragen wird, und worauf beim folgenden Erstarrungsprozeß feinstdisperses Silicium freigesetzt wird. Wird die Bauteil-Oberfläche (2') extrem gekühlt, bspw. mittels flüssigem Stickstoff, so wird eine Schicht (9) aus amorphem Aluminium-Silicium-Glas gebildet.
Abstract:
L'invention concerne un procédé d'assemblage d'une structure en profilés tubulaires, plus particulièrement d'un cadre (1) de bicyclette ou analogue, caractérisé en ce que :
pour préassembler deux profilés tubulaires (2, 4) dont le bout d'extrémité (10) du premier (2) doit être rendu solidaire de la périphérie (11) du second (4), on ménage, au niveau de la périphérie (11) de ce dernier, un orifice (12) de section ajustée au passage du bout d'extrémité (10) du premier profilé tubulaire (2) ; on engage dans la partie interne du second profilé (4) et au moins au droit de l'orifice (12) un embout d'assemblage (13) constituant une butée limitant l'engagement du bout d'extrémité (10) du premier profilé tubulaire (2) dans ledit orifice (12) ; l'on vient chemiser l'embout d'assemblage (13) d'un métal d'apport (M) pour, d'une part, assurer la liaison dudit embout d'assemblage (13) et du second profilé (4) et, d'autre part, pour permettre, à ce métal d'apport (M) de s'infiltrer, par capillarité au niveau de la zone de jonction (B) de ces profilés tubulaires (2, 4) de manière à les rendre solidaires.
Abstract:
There is provided a welding system and a welding method of cylindrical structures capable of efficiently welding the cylindrical structures with high precision. A welding system of cylindrical structures which welds a welding end surface of an upper cylindrical structure and a welding end surface of a lower cylindrical structure, each of which being an end surface in an axial direction thereof and facing each other, includes: two or more welding apparatuses which are opposite to the welding end surfaces of the upper cylindrical structure and the lower cylindrical structure and are disposed at equal arrangement intervals in the circumferential direction of the cylindrical structures; a moving device which is configured to rotate the upper cylindrical structure and the lower cylindrical structure relative to the welding apparatuses in a circumferential direction of the cylindrical structures; and a control device which is configured to control operations of the welding apparatuses and the moving device, wherein each of the welding apparatuses has a filler metal and a heating source which melts the filler metal, and is configured to melt and fuse the filler metal on the welding end surfaces to thereby weld the welding end surfaces, and the control device is further configured to continuously rotate the upper cylindrical structure and the lower cylindrical structure by an angle of the arrangement interval of the welding apparatuses by the moving device, while welding the welding end surfaces with the welding apparatuses.
Abstract:
A method of applying a metallic alloy overlay including providing an iron based feedstock powder including 10 to 75 weight percent iron and manganese, 10 to 60 weight percent of chromium, 1 to 30 weight percent of an interstitial element selected from boron, carbon, silicon or combinations thereof, 0 to 40 weight percent of a transition metal selected from molybdenum, tungsten or combinations thereof and 1 to 25 weight percent niobium. The method also includes providing an electrode including at least 50 weight percent iron and depositing a weld overlay with the feedstock powder and the electrode to create a metallic alloy exhibiting a grain size in the range of 1,000 mum or less.
Abstract:
There is provided a welding system and a welding method of cylindrical structures capable of efficiently welding the cylindrical structures with high precision. A welding system of cylindrical structures which welds a welding end surface of an upper cylindrical structure and a welding end surface of a lower cylindrical structure, each of which being an end surface in an axial direction thereof and facing each other, includes: two or more welding apparatuses which are opposite to the welding end surfaces of the upper cylindrical structure and the lower cylindrical structure and are disposed at equal arrangement intervals in the circumferential direction of the cylindrical structures; a moving device which is configured to rotate the upper cylindrical structure and the lower cylindrical structure relative to the welding apparatuses in a circumferential direction of the cylindrical structures; and a control device which is configured to control operations of the welding apparatuses and the moving device, wherein each of the welding apparatuses has a filler metal and a heating source which melts the filler metal, and is configured to melt and fuse the filler metal on the welding end surfaces to thereby weld the welding end surfaces, and the control device is further configured to continuously rotate the upper cylindrical structure and the lower cylindrical structure by an angle of the arrangement interval of the welding apparatuses by the moving device, while welding the welding end surfaces with the welding apparatuses.
Abstract:
Disclosed is an electronic expansion valve, comprising a shell component (3) and a valve seat assembly, wherein the valve seat assembly comprises a first connection pipe (24) and a second connection pipe (23) which are located on the same straight line; the valve seat assembly forms a main valve chamber, the main valve chamber makes an included angle of an acute angle with the first connection pipe, the valve seat assembly is of an integrated structure and is welded and fixed to the shell component, and there is a preset distance between the radial extension line in the welding position of the two and the first connection pipe. When a valve body relatively rotates to perform welding, welding can be performed smoothly without being subject to the obstruction of the first connection pipe, to form an integrated valve body. Further disclosed is a manufacturing method for the electronic expansion valve. The electronic expansion valve is of an integrated structure, so that the leakage rate of the product can be reduced, and the production cost of the product can also be effectively controlled without increasing the thickness and quality of material.
Abstract:
The invention relates to a device (14) for varying the jet form of flowable products, in particular of foodstuffs, comprising: an intake region (16) for the intake of the flowable products, a discharge region (17) for the discharge of the flowable products, and several channels (18) for conducting the flowable products, each channel (18) having at least one inlet (19) assigned to the intake region (16) and at least one outlet (20) assigned to the discharge region (17). The invention also relates to the use of said device (14) for filling foodstuffs and to a method for producing said device (14). In order to ensure that the shape and speed profile of the jet beam can be produced in a simple and easy manner, at least one of the channels (18) is curved at least in sections.