摘要:
A tower (C) production method is developed with the present invention, comprising a first production stage including the steps of unrolling and bringing into a planar state a sheet metal (B) wound around a coil (A); bending the planar sheet metal (B) at the lateral direction at varying bending radii (d); and winding the bent sheet metal (Β') into a conical coil (Α'), as well as a final production stage yielding the tower and including the steps of feeding the sheet metal (Β') unwound from the conical coil (Α') to at least one winding machine (8), and bending and winding the bent sheet metal (Β') in the winding machine around a central bending axis (T) parallel to one surface (B1) thereof so that a defined initial winding radius and the angle between a longer edge (B3) thereof and the axis (T) are kept constant and the longer edge (B3) of the sheet metal is joined over itself.
摘要:
Die Erfindung betrifft eine Vorrichtung zum Formen von Hohlprofilen (5), umfassend ein Formwerkzeug, das einen länglichen Formkörper (2), dessen Querschnittsfläche und/oder Querschnittsform entlang einer Längsachse variiert und einen einen Abschnitt des Formkörpers (2) umgreifenden Formkopf (10) mit mindestens zwei Formrollen (3) zum Biegen eines entlang einer Mantellinie des Formkörpers (2) zuführbaren Blechstreifens (1) um den Formkörper (2) aufweist, wobei der Formkopf (10) und/oder der Formkörper (2) so beweglich ausgebildet sind, dass eine Relativbewegung des Formkopfes (10) in Richtung der Längsachse ausführbar ist und wobei die Formrollen (3) jeweils eine tangential zum Formkörper (2) liegende Achse aufweisen, deren Abstand zur Längsachse entsprechend der Querschnittsfläche und/oder Querschnittsform des Abschnittes des Formkörpers (2), den der Formkopf (10) umgreift, veränderlich ist, und wobei die Formrollen (3) jeweils eine Kraft in Richtung zum Formkörper (2) ausüben, weiter umfassend eine Vorschubeinheit (9) zum Vorschub des Blechstreifens (1) und ein den Formrollen (3) in Vorschubrichtung (6) des Blechstreifens (1) nachgeordnetes Schweißgerät (4), mit dem die Ränder des gebogenen Blechstreifens (1) verschweißbar sind, wobei das Schweißgerät (4) die dabei entstehende Schwei-βung überwacht und wobei die Vorschubgeschwindigkeit (V v ) der Vorschubeinheit (9) in Abhängigkeit von der Abweichung zu einer vorgegebenen Sollqualität (Q s ) steuerbar ist und wobei die Bewegung des Formkopfes (10) und/oder des Formkörpers (2) steuerbar ist.
摘要:
The aim of the invention is to form conical tubes out of sheet metal plates. A matrix (1) is provided with a conical cavity (2). A conical mould can dive into said cavity and is guided into the matrix along a curve (A). Conical tube casings can thus be produced easily.
摘要:
Method for the fabrication of cones of sheet material where the blank (22) includes two curved edges (24) and (26) that are circular and have the radius R and r respectively and a common center C. The blank further has two straight lateral edges (28) and (30), which are arranged angled in relation to the part circular edges. An angle alpha between the radius through a corner (A) and a first straight edge (30) is as great as an angle beta between the radius through a second corner (B) and the second straight edge (28). A frustrum of a cone is obtained of the blank after the rolling of this to a cone where the lateral edges (28) and (30) have been united to make a joint (32) that runs helically around the cone.
摘要:
A plate rolling apparatus, for rolling a plate to form a pipe which may be tapered, a gripper rib (14) on the mandrel (11) for receiving the edge of a flat plate. The mandrel (11) being mounted between support frame ends (24, 25) and on a single pressure roller (15) mounted beneath the mandrel (11) and adapted to contact the surface of the plate and apply a squeezing force against the plate and mandrel (11) during a rolling operation, the pressure roll (15) being laterally movable relative to the centreline of the mandrel depending upon the location of the gripper rib (14) in the region of the roller (15) so as not to foul the gripper rib (14) yet applying said squeezing force to said plate as required. A mandrel (11) having an adjustable taper angle is disclosed as an adjustable mandrel support member (2, 25) and mandrel journal (26) to accommodate variable mandrel diameters and angles of taper.
摘要:
The invention relates to a method of manufacturing parts for an exhaust pipe-silencer combination. According the method, the parts are formed of a metal strip by a helical seaming process. Outer tubes (1,3,4) of the silencer, which include a conical portion, are helically seamed beginning from a cylindrical portion having a larger diameter. The substantially conical portion is helically seamed so that the diameter thereof is diminished continuously and smoothly to correspond to the diameter of the parts of the exhaust pipe. Finally, a second cylindrical portion having a smaller diameter is formed. The invention is also related to an exhaust pipe-silencer combination, in particular for motor vehicles, in which both the exhaust pipe and an outer tube (2) of the silencer, as well as, of the outer tubes of the exhaust pipe and the silencer, outer tubes (1,3,4) most suitably conically changing in diameter, are of profiled, lock-fold jointed, helically-seamed tubing. The outer mantle of the silencer is partly formed by two separate parts (1,3) having substantially conical narrowing portions. The tube parts provided with the narrowing portions are connected to each other by the helically-seamed tube (2) having the diameter of the mantle of the silencer, utilizing the screw-threads of the profiling of the different parts.
摘要:
A method of production of a shaped article able to suppress occurrence of shaping defects, that is, a method of production of a shaped article including a first step of press-forming a metal plate (1a) into a U-shape to obtain a U-shaped article (1b) having a bottom part (2) straight extending in a longitudinal direction and a second step of press-forming the U-shaped article (1b) to bend it in the longitudinal direction so that the bottom part (2) of the part projects to the inside and obtain a U-cross-section bent article (1c).