Abstract:
Provided are a hollow coil spring and a method for manufacturing the hollow coil spring, whereby inner surface corrosion can be prevented, and product appearance can be improved. In an end sealing step, the core material of an end (Wa) of a spring material (W) is gathered by machining to seal the end (Wa). Spinning is preferably carried out as the form of machining. While pressing the end of the spring material (W) with a squeezing roller (R), for example, toward the inside in the radial direction, the squeezing roller (R) is appropriately moved in the axial direction as necessary. The end (Wa) of the spring material (W) is thus occluded, as shown in figure 3, eliminating the need to use a separate member such as a lid member. Such an end sealing step can be carried out immediately after an inner surface processing step, for example. In a coil forming step performed after the end sealing step, even if the end (Wa) of the spring material (W) is gripped and the spring material (W) is wrapped around a rod, the formation of a gap at the end (Wa) will be prevented.
Abstract:
Die Erfindung betrifft ein Verfahren zum Umformen eines Rohrabschnittes, bei welchem ein Boden mit einer Öffnung und mit einem nach innen ragenden Kragen gebildet wird. Es ist vorgesehen, dass der Rohrabschnitt in Rotation versetzt wird, dass der Rohrabschnitt mittels einer Umformrolle eingezogen wird, wobei durch das Einziehen der Boden gebildet wird, dass in den Boden eine nach innen ragende Materialverdickung eingeformt wird und dass im Bereich der nach innen ragenden Materialverdickung eine Öffnung in den Boden eingebracht wird, wobei durch zumindest einen Teil der nach innen ragenden Materialverdickung der nach innen ragende Kragen gebildet wird. Weiterhin betrifft die Erfindung eine Vorrichtung zur Umformung eines Werkstücks.
Abstract:
L'invention concerne un procédé de fabrication d'un volume d'échappement (3) pour ligne d'échappement de véhicule automobile, ce volume d'échappement (3) comportant une enveloppe (8) définie par un corps tubulaire (9) refermé à chacune de ses extrémités (10; 10') par un moyen de fermeture (11; 11') ainsi que, au niveau de l'un au moins de ces moyens de fermeture (11; 11'), au moins un moyen de raccordement (12) du volume d'échappement (3) à un tube (4) et au moins un moyen (16) pour la réception, de manière amovible, d'un élément démontable (17). Ce procédé consiste en ce que l'on referme le corps tubulaire (9), à l'une au moins de ses extrémités (10 ; 10'), par un moyen de fermeture (11; 11') réalisé de manière incomplète et en sorte de laisser subsister un orifice au niveau duquel est réalisé, par étirage, un embout (19) constituant ledit moyen de réception (16) d'un élément démontable (17). L'invention concerne, encore, un volume d'échappement (3) présentant ces caractéristiques ainsi qu'une ligne d'échappement comportant un tel volume d'échappement (3).
Abstract:
A tube (10) includes a central crushed region (18) for receiving a fixing element (22) and lateral non-crushed regions (20) disposed either side of the crushed region (18) which provide additional structural strength to the tube.
Abstract:
Techniques are described for making one-piece tubes for surgical instruments in which an inner tube (204) that carries a cutting implement (208) is disposed for movement within an outer tube (200) having a cutting window (206) that exposes the cutting implement to tissue. Swaging is performed to close an end (86) of a tubular member (80) that is to serve as either the inner tube or the outer tube. Other processing steps are also performed. For example, a selected amount of a protrusion (87) formed by swaging is cut away, the tube material is fused together at a seam (89) formed by the swaging, and the closed distal end of the tubular member (80) is formed into a selected shape. For example, the selected shape is rounded so that the distal end defines convex (e.g., substantially hemispherical) interior and exterior distal surfaces (190). This renders the tube suitable for use in full-radius surgical instruments. Alternatively, the selected shape is flattened so that the distal end defines flattened interior (191') and exterior (190') distal surfaces. In this case, the tube can be used in end cutting surgical instruments.
Abstract:
Microsurgical probes having a distal tip with a flat outer surface and a flat inner surface, and methods of forming such probes, are disclosed.
Abstract:
Microsurgical probes having a distal tip with a flat outer surface and a flat inner surface, and methods of forming such probes, are disclosed.