Abstract:
The invention concerns an oscillating arm (5) having a length (L) suitable to provide it with high stiffness in its oscillation plane and a thickness (t) suitable for providing it with a low stiffness in a plane perpendicular to said oscillation plane, said arm (5) being mounted in combination with guide means (9), (10) configured to limit or prevent, in said perpendicular plane, deformations resulting from the low stiffness of the arm in said plane and to enable the alternating rotational movement of said arm between two angular positions.
Abstract:
A levelwind system for a coiled tubing reel (26) including an arcuate guide arm (48) extending over the upper surface of the reel (26). A universal joint (50) mounts the lower end of the arm (48) for pivotal movement both vertically and horizontally. A guide member (52) is supported on the free end of the guide arm (48) for guiding the coiled tubing T on and off reel (26). A lift cylinder (54) is effective to raise and lower guide arm (48). A balancing cylinder (60) is effective for moving guide arm (48) laterally. A hydraulic fluid circuit responsive to a position sensor (111) and a microprocessor (112) as shown in Figure 12 is effective for controlling the movement of the coiled tubing guide arm (48).
Abstract:
Le bras oscillant (5) présente une largeur (L) apte à lui conférer une raideur élevée dans son plan d'oscillation et une épaisseur (t) apte à lui conférer une raideur faible dans un plan perpendiculaire audit plan d'oscillation, ledit bras (5) étant monté en combinaison avec des moyens de guidage (9), (10) conformés pour, d'une part, limiter ou interdire, dans ledit plan perpendiculaire, des déformations résultant de la faible raideur du bras dans ce plan et, d'autre part, permettre le mouvement de rotation alternative dudit au bras entre les deux positions angulaires.
Abstract:
The invention relates to a method for operating a machine, especially a winder, that winds threads. A thread is alternately guided to-and-fro between two change-over points within a traversing stroke and crosswise in relation to the drawing-off direction of the thread by means of a thread guide of a traversing device for being laid onto a rotating bobbin. The invention also relates to devices for carrying out the methods. According to the invention, an end point of the change-over of the thread guide is fixed at a change-over point. The traversing stroke is corrected, preferably shortened or prolonged, during a following stroke and according to the position of the end point. In an alternative embodiment, the actuation of the thread guide or the traversing device is controlled according to a predetermined winding ratio and a bobbin speed in such a way that the winding ratio is maintained when the bobbin speed is changed or not.
Abstract:
The aim of the invention is to change the yarn (F) in a winding frame (1) within a traverse (H) and at a high speed by using a pointer-shaped yarn guide, hereafter referred to as the pointer. To this end, the pointer is tapered with regard to shape and weight toward the free end, whereby in a preferred embodiment, a polynomial of at least one degree is used. In addition, the yarn is guided on a guide plate (6). The control (12) of the motor (8) is provided such that the pointer (7) can not only be provided for guiding the yarn (F) within the traverse (H), but such that the pointer stops in a position (C) within the changing traverse (H) in order to form an end bead on a ready-made spool. The pointer also stops in a position (A and B) outside the changing traverse (H) in order to permit the yarn to be grasped by a new core when drawn in (8) during a changing of the spool, whereas in position (B), the yarn is wound on said core to form a yarn reserve winding before the yarn is driven back once again in the traverse (H) by the pointer (7). The selected reverse points can be entered into the control, and the control and the motor are able to reverse the pointer at a selected reverse point. For that purpose, reverse means are provided which preferably operate in a contactless manner, e.g. electromagnetically. The same principles can also be used for other applications in which a lever must effect a swiveling movement over a predetermined traverse.
Abstract:
The present invention relates to a method for operation of a yarn- guide element in winding machines according to a final law of motion. Advantageously, the method comprises at least a first step for mechanical operation of the yarn-guide element according to an intermediate and/or average law of motion with respect to two predefined laws of motion, and a second supplementary step of fine adjustment of said mechanical operating device to adapt said intermediate and/or average law of motion to said final law of motion.
Abstract:
Die vorliegende Erfindung betrifft ein Verfahren zum Einfädeln eines Fadens (16) in einen Führungsschlitz (21) eines einzeln angetriebenen, fingerförmigen Fadenführers (13) einer Textilmaschine, der zur Verlegung eines Fadens (16) auf einer rotierenden Spule (5) den Faden (16) parallel zur Spulenachse über eine Changierhubbreite führt, wobei - vor Beginn der Einfädelung der Fadenführer (13) in eine Ausgangsposition (A) überführt wird; - dann der Fadenführer (13) in eine Einfädelposition (E) überführt wird, und den einzufädelnden Faden (16) mitnimmt; - dabei zwischen dem Fadenführer (13) und dem Faden (16) eine Relativbewegung erzeugt wird, um den Faden (16) in den Fadenführer (16) einzufädeln; und - der Faden (16) für die Einfädelung unter Spannung gehalten wird.
Abstract:
A levelwind system for a coiled tubing reel (26) including an arcuate guide arm (48) extending over the upper surface of the reel (26). A universal joint (50) mounts the lower end of the arm (48) for pivotal movement both vertically and horizontally. A guide member (52) is supported on the free end of the guide arm (48) for guiding the coiled tubing T on and off reel (26). A lift cylinder (54) is effective to raise and lower guide arm (48). A balancing cylinder (60) is effective for moving guide arm (48) laterally. A hydraulic fluid circuit responsive to a position sensor (111) and a microprocessor (112) as shown in Figure 12 is effective for controlling the movement of the coiled tubing guide arm (48).
Abstract:
A tape winding machine (10) for winding fragile tape (11) on a package core (18) in a side to side motion using a pivoted steering frame (19) and guide rolls (12), (16) and (17). The side to side motion of the steering frame (19) allows the tape (11) to be evenly distributed along the package core (18).
Abstract:
Die Erfindung betrifft einen Fadenverlegeantrieb, insbesondere für eine Arbeitsstelle einer Textilmaschine, mit einem Fadenführer und einem dafür vorgesehenen elektromotorischen Einzelantrieb sowie einem Winkelgeber zur Erfassung der tatsächlichen Winkelposition (11) (φ_ist) des Fadenführers und einem Regler (4), durch den zumindest eine Stellgröße (9) (u) für eine Endstufe des elektromotorischen Einzelantriebes vorgebbar ist, um den Fadenführer anzutreiben. Der Fadenverlegeantrieb ermöglicht hohe Verlegefrequenzen bei Vermeidung von Verlegefehlern, wobei der Regler (4) eine Mehrgrößenregelung umfasst, um die zumindest eine Stellgröße (9) (u) und somit die tatsächliche Winkelposition (11) (φ_ist) des Fadenführers präzise zu regeln. Es wird ein Zustandsbeobachter (12) eingesetzt, um die inneren Zustände, wie sie in der realen Regelstrecke (10) vorliegen, mit genügender Genauigkeit zu bestimmen und dem Regler (4) zur Verfügung zu stellen.