Abstract:
The invention relates to a device (1) for determining a distance to a surface of a workpiece (100), wherein the device (1) comprises a means (9) for emitting an energy beam towards the surface. The device comprises a contact member (11) with a first surface (12) configured to contact the surface of the workpiece (100) and a second surface (13) facing the energy beam emitting means. The energy beam emitting means (9) is arranged for directing the energy beam to the second surface (13) of the contact member (11).
Abstract:
The method of the Invention consists in that for the manufacture of finned tubes a fibre laser is used. A flat bar is taken and is bent by mechanical means to form a U section, an L-section or an I section, which is then wound onto a rotating tube by means of expedient feed rolls. Upon contact of the flat bar the laser beam or a MAG welding arc is guided on the lower surface of the U section, L section or I section and the formed fillet weld is fused by the laser beam. Laser beam welding is carried out at high speed of more than 1 m/min, whereas prior to welding the tube is pre-heated to 0 - 1000C. It is possible to carry out welding using a filler in the form of a wire dispensed into the area of the focused beam.
Abstract:
The present application relates to a drum (1) of a dryer and a method of manufacturing a drum (1) of a dryer for the drying of materials in the form of conglomerates, wherein the drum (1) comprises blades for making the material advance inside the drum (1), which are fixed to the drum (1) by means of supports welded to the drum (1) itself.
Abstract:
An auger useable for creating an opening in the ground for a soil sensor housing wherein the sensor housing has a predetermined volume and a tapered outer surface, includes an auger made in accordance with the methods described and defined in this specification. The auger having a shaft having an outer surface of circular cross-section having an larger outer diameter at one end than the other end and a strip material having a helical shape with an inner wall having a larger inner diameter at one end than the other end of the helical shape wherein the helically shaped material is fixed over the outer diameter of the shaft to form a tapered auger with helical flighting. The volume of the opening created by an auger in the ground will provide a matching volume for a sensor housing of a predetermined volume such that substantially the full length of the tapered outer surface of the sensor is adjacent the ground along the full length/depth of the created opening.
Abstract:
An auger useable for creating an opening in the ground for a soil sensor housing wherein the sensor housing has a predetermined volume and a tapered outer surface, includes an auger made in accordance with the methods described and defined in this specification. The auger having a shaft having an outer surface of circular cross-section having an larger outer diameter at one end than the other end and a strip material having a helical shape with an inner wall having a larger inner diameter at one end than the other end of the helical shape wherein the helically shaped material is fixed over the outer diameter of the shaft to form a tapered auger with helical flighting. The volume of the opening created by an auger in the ground will provide a matching volume for a sensor housing of a predetermined volume such that substantially the full length of the tapered outer surface of the sensor is adjacent the ground along the full length/depth of the created opening.
Abstract:
The invention relates to a method for joining an aluminium rib to a steel tube, comprising the steps of (a) providing a first component in the form of a steel tube having an inner surface and an outer surface, and wherein at least the outer surface has a surface coating in the form of a braze-promoting layer comprising one or more metals selected from the group comprising nickel, cobalt, and palladium; (b) providing a second component forming a fin in the form of an aluminium brazing sheet, the aluminium brazing sheet comprising of an aluminium alloy core upon which on at least one side filler alloy is clad, and wherein the filler alloy has a composition comprising, in wt.%: Si 5-15%, Mg 0.03-1 %, one or more elements selected from the group consisting of: (Bi 0.02-0.5, Pb 0.03-0.4, and Sb 0.03-0.4, and the sum of these elements being 0.5% or less), the balance aluminium; (c) bringing the first component and the second component into contact to form an assembly of components and whereby the braze-promoting layer is facing the filler alloy clad layer of the brazing sheet; (d) heating and subsequently holding the assembly of components in an inert gas atmosphere and without applying flux at a brazing temperature in the range between 550°C and 615°C to form a permanent bond occurring on at least one contact point of these components; and (e)cooling the brazed assembly of components.
Abstract:
Bei einem Verfahren zur Herstellung eines Zellenrades aus Metall werden nacheinander die folgenden Schritte durchgeführt: (a) Bereitstellen eines Blechstreifens (26) mit einer mindestens der Länge einer Umfanglinie einer Zwischenhülse entsprechenden Länge (1) und mit einer mindestens der Länge des Zellenrades entsprechenden Breite (b); (b) Setzen von Lamellen (16) an vorgegebenen Stellen in vorgegebener Anzahl auf beiden Seiten des Blechstreifens (26) senkrecht zur Blechoberfläche und senkrecht zur Längsrichtung des Blechstreifens (26) und Verbinden der Lamellen (16) mit dem Blechstreifen (26) durch Schweissen oder Löten; (c) Biegen des auf beiden Seiten mit den Lamellen (16) bestückten Blechstreifens (26) und Verbinden der beiden Enden des Blechstreifens (26) durch Schweissen oder Löten unter Bildung der Zwischenhülse; (d) Setzen einer ersten, zur Zwischenhülse konzentrischen, rohrformigen Hülse als Aussenhülse und einer zweiten, zur Zwischenhülse konzentrischen, rohrformigen Hülse als Innenhülse und Verbinden der freien Enden der Lamellen (16) mit der Aussenhülse bzw. der Innenhülse durch Schweissen oder Löten. Das Verfahren ermöglicht die Herstellung von Zellenrädern mit Materialwandstärken von 0,2 mm und weniger für den Einsatz in Druckwellenladern.
Abstract:
The invention relates to a method for joining an aluminium rib to a steel tube, comprising the steps of (a) providing a first component in the form of a steel tube having an inner surface and an outer surface, and wherein at least the outer surface has a surface coating in the form of a braze-promoting layer comprising one or more metals selected from the group comprising nickel, cobalt, and palladium; (b) providing a second component forming a fin in the form of an aluminium brazing sheet, the aluminium brazing sheet comprising of an aluminium alloy core upon which on at least one side filler alloy is clad, and wherein the filler alloy has a composition comprising, in wt.%: Si 5-15%, Mg 0.03-1%, one or more elements selected from the group consisting of: (Bi 0.02-0.5, Pb 0.03-0.4, and Sb 0.03-0.4, and the sum of these elements being 0.5% or less), the balance aluminium; (c) bringing the first component and the second component into contact to form an assembly of components and whereby the braze-promoting layer is facing the filler alloy clad layer of the brazing sheet; (d) heating and subsequently holding the assembly of components in an inert gas atmosphere and without applying flux at a brazing temperature in the range between 550°C and 615°C to form a permanent bond occurring on at least one contact point of these components; and (e)cooling the brazed assembly of components.