EP0873960B1 - Procédé et dispositif d'enroulement ou de déroulement piloté d'un produit long sur respectivement à partir d'un corps de bobine - Google Patents

Procédé et dispositif d'enroulement ou de déroulement piloté d'un produit long sur respectivement à partir d'un corps de bobine Download PDF

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Publication number
EP0873960B1
EP0873960B1 EP98810257A EP98810257A EP0873960B1 EP 0873960 B1 EP0873960 B1 EP 0873960B1 EP 98810257 A EP98810257 A EP 98810257A EP 98810257 A EP98810257 A EP 98810257A EP 0873960 B1 EP0873960 B1 EP 0873960B1
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EP
European Patent Office
Prior art keywords
reel body
winding
trough
drive
drive member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP98810257A
Other languages
German (de)
English (en)
Other versions
EP0873960A3 (fr
EP0873960A2 (fr
Inventor
Louis Zurfluh
Robert Hedinger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZURFLUH, LOUIS
Original Assignee
Zurfluh Louis
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CH00869/97A external-priority patent/CH692341A5/de
Application filed by Zurfluh Louis filed Critical Zurfluh Louis
Publication of EP0873960A2 publication Critical patent/EP0873960A2/fr
Publication of EP0873960A3 publication Critical patent/EP0873960A3/fr
Application granted granted Critical
Publication of EP0873960B1 publication Critical patent/EP0873960B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
    • B65H75/34—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables
    • B65H75/38—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables involving the use of a core or former internal to, and supporting, a stored package of material
    • B65H75/44—Constructional details
    • B65H75/4481—Arrangements or adaptations for driving the reel or the material
    • B65H75/4486—Electric motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/18—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H49/00—Unwinding or paying-out filamentary material; Supporting, storing or transporting packages from which filamentary material is to be withdrawn or paid-out
    • B65H49/18—Methods or apparatus in which packages rotate
    • B65H49/20—Package-supporting devices
    • B65H49/24—Rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
    • B65H54/28—Traversing devices; Package-shaping arrangements
    • B65H54/36—Yarn-guide advancing or raising mechanisms, e.g. cop-building arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
    • B65H54/40—Arrangements for rotating packages
    • B65H54/42—Arrangements for rotating packages in which the package, core, or former is rotated by frictional contact of its periphery with a driving surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
    • B65H54/40—Arrangements for rotating packages
    • B65H54/54—Arrangements for supporting cores or formers at winding stations; Securing cores or formers to driving members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/38—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension
    • B65H59/384—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension using electronic means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/10—Size; Dimensions
    • B65H2511/14—Diameter, e.g. of roll or package
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2513/00—Dynamic entities; Timing aspects
    • B65H2513/10—Speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
    • B65H2515/30—Forces; Stresses
    • B65H2515/32—Torque e.g. braking torque

Definitions

  • the invention relates to a method according to the preamble of the claim 1 and an associated device.
  • the bobbin has a central bore on both sides of a pin engaging in this hole held.
  • the latter and consequently the bobbin are then used for winding a motor turned.
  • the disadvantage here is the fact that a slip-free transmission of the rotary motion from the engine on the bobbin is not guaranteed, especially when starting, because between the pins and this bobbin by the moment of inertia the latter often creates sliding friction when starting off.
  • a targeted winding, with the winding after winding without a gap can be applied between each other on the bobbin can not be realized with this device.
  • a device for the continuous winding of nets after the Document US-A-5,507,450 uses a pivotable support for the spool swiveled up on two drive rollers or removed from them.
  • the carrier has a clamping device, by means of which one of the spools laterally protruding axis clamped and the coil with this carrier is held.
  • the construction of such a clamping device is relative complicated and time-consuming.
  • the object of the present invention is to one a method and the other a device according to the entry to create the genus mentioned, by means of which, in addition to a precise or unwinding a constant tensile force on the elongated object, preferably a wire.
  • This controlled opening or Unwinding should be done by a device that is simple built and also allows easy usability.
  • This device is also intended to be used in particular by hand Device rolled coil body, which has an outer diameter up can be up to one meter or larger, without great effort loaded onto or removed from this device can be.
  • this method can be wound up or unwound extremely reliable and without excessive stress on the object to be wound or unwound. It gets along with an extremely even winding also a constant tensile force created on this object, with which this method specifically suitable for the winding of cables, the very nature of which are sensitive.
  • this helps to realize this uniform winding trained device at.
  • drive shafts provided on which the bobbin rests.
  • an additional pressure roller on the top of the Coil body a pressing force directed against the drive shafts generated to slip-free reliable guidance of the bobbin to reach.
  • a lifting device for loading or Unloading the bobbin on the resp. provided by the device.
  • This lifting device advantageously has a tilting trough, by means of which the bobbin is lifted onto or off the drive shafts can be tipped.
  • FIG. 1 shows a device 10 for the controlled winding or unwinding of elongated objects 11 onto or from a coil former 15 or a smaller bobbin 16.
  • elongated objects 11 in particular, are cables, wires, tapes, ropes, cloths or something like that.
  • the device 10 is designed such that with your advantageously standardized bobbin or so-called bobbin with one Outside diameter from 500 millimeters to one of one Meters can be recorded.
  • the coil former 15 or 16 lies on at least two Drive shafts 22, 24, at least one, preferably both Drive shafts 22, 24 with the advantageously provided as an electric motor Drive member 20 rotatably connected via a toothed belt 20 or the like are.
  • a lifting device is provided. who are trained like this is. that the bobbin 15, 16 in particular by hand on the in the loading position lowered lifting device can be rolled out, which the bobbin by mechanical lifting on the drive member 20 drivable drive shafts 22, 24 lifts or tilts away from them.
  • the drive shafts 22, 24 With a diameter, which is significantly smaller than that of the bobbin 15, approximately in a ratio between 1: 8 and 1:15, when turning starts transmitted a very small torque of the coil body, resulting in a slip-free transmission of the rotation contributes.
  • tipping the tub 40 for unloading the bobbin is the rear drive shaft 24, the is stored in the tub, pivoted up to position 24 ', thereby the bobbin is rolled out of the device 10 onto the floor 19.
  • At least one pressure roller 25 is on the top of the Coil body 15, 16 is provided, one against the drive shafts 22, 24 directed contact force generated so that the bobbin during the winding does not fall from these drive shafts.
  • This pressure roller 25 is conveniently on the underside of one above the coil body 15, 16 vertically adjustable laying frame 30 rotatably mounted. In the operating position, the pressure roller 25 causes a radial counter the center of the bobbin 15, 16 acting bearing force, which in their line of action between the two drive shafts 22, 24 directed is.
  • the laying frame 30 is on both sides of one in the vertical direction Support leg 31 adjustable telescopically by means of a drive.
  • the support legs 31 in turn are attached to a base 21.
  • This Laying frame 30 can by its height adjustment depending on the diameter of the bobbin from an upper end position to a position 30 'or further down into a position 30' '.
  • a guide head contained in the laying frame 30 35 when winding as close as possible to the bobbin 15 or 16 can be positioned so that the elongated object 11 in optimal Way is led.
  • the target value 54 for the tensile force on the elongated object 11 set via a potentiometer 54 'or the like and to the Controller 50 passed.
  • This defined by the computer 56 Torque serves as the actual value together with the setpoint 54 Target size by means of which the controller 50 controls the drive member 20.
  • a feedback of the measured torque arrives as actual value 57 back to the controller, which subsequently deviates from the setpoint makes an adjustment of the actual value.
  • Adjustment of the torque becomes with increasing Coil diameter changing resistance moment compensated.
  • the setpoint input 54 becomes the changing program-controlled setting from the computer 56 with a corresponding factor for the effective target size changed.
  • the speed is regulated of the drive member 20 and thus the coil body 15.
  • This speed depends on the desired winding speed, which one from the system-specific characteristics, such as the wire quality, the Wire diameter and / or other factors such as For example, of the possible feeding speed, that of a wire or similar supplying production machine.
  • the determination the speed also depends on the winding diameter 15 ', which is measured by the sensor 52.
  • This to the computer 56 The measurement signal supplied is therefore used for the program-controlled setting the speed used.
  • This software-defined by the computer 56 Speed is passed as a signal variable to a controller 61, which Drive element 20 controls with a speed setpoint.
  • the defined one Speed is designed such that it is approximately to achieve constant winding speed with increasing winding diameter decreases.
  • a tachometer generator 62 then reports the actual value of the Speed on the electric motor back to the controller 61, which in itself conventional way compares the actual with the target value and at most corrects the setpoint.
  • the winding speed is advantageous between 0 and 15 m / min, meanwhile the torque for the tractive force is usually adjustable between 30 and 150 Nm.
  • a control element 64 receives a signal from the tachometer generator 62 and controls the laying motor 36 with a proportional size so that it a speed of the spindle shaft 38 and thus a predetermined slope of the guide head 35 causes the rotation of the coil 15th corresponds approximately to the diameter of the object 11 to be wound.
  • the guide head 35 is vertical in the laying frame 30 to the axis of rotation of the bobbin 15 freely movable in the horizontal direction stored.
  • the in the guide head 35 of several roles 33, 34 guided elongated object 11 in an approximately constant Angle to the bobbin supplied.
  • the rollers 33, 34 have functional. moderately on ring grooves in which the wire or the like out is.
  • the lifting device is advantageously made of a tipping trough 40 with an in the loading position formed the bobbin 15, 16 receiving opening, the tilting trough 40 being approximately coaxial with the front Drive roller 22 extending tilt axis is pivotally arranged.
  • the tilting trough 40 is a pivot cylinder indicated in FIG. 1 32 or the like provided on the one hand on the base 21 and on the other is articulated laterally on the tipping trough 40.
  • This tipping tub 40 has a front wall 40 ′ which, when the tub is tilted down, 40 approximately on the floor 19 carrying the device 10, so that the bobbin is rolled into the tub when loading can, as shown in Fig.5.
  • the coil body 15 has a disk-shaped on both sides Side wall 15 'on the corresponding stop rings 23, 25 on the drive shafts 22, 24 are centered. These adjustable on the latter Stop rings 23, 25 prevent the bobbin from moving in Axis direction of these drive shafts.
  • the drive shaft 24 is also in the unloading position 24 'shown.
  • FIG. 4 shows a plan view of the device 10 in which a feed unit of the guide head 35 can be seen. It is from one Laying motor 36 via a toothed belt 37 or the like, the spindle shaft 38 driven, which when rotating a linear feed movement of the guide head 35 parallel to the axis of rotation of the bobbin 15 causes.
  • Fig. 5 illustrates the tipping trough 40 in the loading position, in which the coil former 15 either by swiveling the tilting tub 40 up tilted onto the drive shafts 22, 24 or out of the tilting tub 40 can be rolled out.
  • the installation frame 30 is in this loading position advantageously moved to the upper end position. It is also dotted Hatching illustrates the side cover 44 of the device 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Textile Engineering (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Winding Filamentary Materials (AREA)

Claims (11)

  1. Procédé d'enroulement et de déroulement piloté d'un objet oblong sur un ou à partir d'un corps de bobine, dans lequel le au moins un objet oblong (11) est dirigé depuis une tête de guidage (35) vers le corps de bobine (15, 16), logé de façon à pouvoir tourner pour cet enroulement ou ce déroulement et qui est mis en rotation par un organe de commande (20), dans lequel un réglage commandé par programme du régime de vitesse et du couple de rotation de l'organe de commande (20) est réalisé, en fonction du diamètre d'enroulement (15') mesurable pour un procédé d'enroulement ou de déroulement du corps de bobine (15, 16), et dans lequel, au moyen d'un régulateur (50), la valeur réelle de la force de traction sur l'objet oblong (11) est comparée via le couple de rotation mesuré au niveau de l'organe de commande (20) avec une valeur théorique réglable et, en cas d'écart, la valeur réelle (57) est ramenée à la valeur théorique,
    caractérisé en ce que le corps de bobine (15, 16) repose sur au moins deux arbres moteurs (22, 24), au moins un, de préférence les deux arbres moteurs (22, 24) étant reliés par pivotement à l'organe de commande (20), en ce qu'est prévu un mécanisme de levage qui est conçu de façon telle que le corps de bobine (15, 16) peut rouler sur ce mécanisme de levage abaissé ou rouler depuis celui-ci, le mécanisme de levage soulevant le corps de bobine par un soulèvement manuel sur les arbres moteurs (22, 24) pouvant être commandés par l'organe de commande (20) ou le basculant depuis ceux-ci, et en ce que le dispositif de levage présente une caisse (40) comportant une ouverture pour loger le corps de bobine (15, 16), la caisse pouvant pivoter autour de l'axe de basculement s'étendant globalement coaxialement à l'arbre moteur (22), et l'autre arbre moteur (24) étant logé dans la caisse de façon telle qu'il peut pivoter vers le haut dans une position (24') en cas de basculement de la caisse et que le corps de bobine est de ce fait roulé hors de la caisse.
  2. Procédé selon la revendication 1, caractérisé en ce que le diamètre d'enroulement respectif est mesuré par un capteur (52) disposé à l'extérieur du corps de bobine (15, 16), et est transmis à un ordinateur (56) ou analogue qui, en fonction du diamètre constaté, règle le régime et le couple de rotation au niveau de l'organe de commande de façon commandée par programme, et le signale au régulateur (56, 61).
  3. Procédé selon la revendication 2, caractérisé en ce que l'organe de commande (20) est piloté par le régulateur (50) avec une grandeur théorique du couple de rotation, laquelle se compose d'une valeur théorique (54) réglée au moyen d'un potentiomètre (54') ou analogue et du réglage commandé par programme par l'ordinateur (56).
  4. Procédé selon l'une des revendications précédentes, caractérisé en ce que le réglage commandé par programme du régime de vitesse et du couple de rotation de l'organe de commande (20), ainsi que la valeur théorique (54) de la force de traction, sont déterminés par la structure du fil, le diamètre du fil et/ou d'autres facteurs.
  5. Procédé selon la revendication 1 ou 2, caractérisé en ce que la tête de guidage (35), pendant l'enroulement, exécute un déplacement par allers et venues parallèle à l'axe de rotation du corps de bobine (15, 16) et exécuté proportionnellement au régime mesuré de l'organe de commande (20), de sorte que l'objet (11) utilisé en tant que câble ou équivalent est enroulé en plusieurs couches adjacentes et régulières, sans écart entre elles.
  6. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que la tête de guidage (35), pendant l'enroulement, exécute un déplacement qui se fait perpendiculairement à l'axe de rotation du corps de bobine (15, 16), déplacement au moyen duquel cet objet oblong (11) est amené vers le corps de bobine selon un angle constant.
  7. Dispositif permettant de réaliser le procédé selon la revendication 1, caractérisé en ce que le corps de bobine (15, 16) repose sur au moins deux arbres moteurs (22, 24), au moins un, de préférence les deux arbres moteurs (22, 24) étant reliés par pivotement à l'organe de commande (20), en ce qu'est prévu un mécanisme de levage qui est conçu de façon telle que le corps de bobine (15, 16) peut rouler sur ce mécanisme de levage abaissé ou rouler depuis celui-ci, le mécanisme de levage soulevant le corps de bobine par un soulèvement manuel sur les arbres moteurs (22, 24) pouvant être commandés par l'organe de commande (20) ou le basculant depuis ceux-ci, et en ce que le dispositif de levage présente une caisse (40) comportant une ouverture pour loger le corps de bobine (15, 16), la caisse pouvant pivoter autour de l'axe de basculement s'étendant globalement coaxialement à l'arbre moteur (22), et l'autre arbre moteur (24) étant logé dans la caisse de façon telle qu'il peut pivoter vers le haut dans une position (24') en cas de basculement de la caisse et que le corps de bobine est de ce fait roulé hors de la caisse.
  8. Dispositif selon la revendication 7, caractérisé en ce qu'au moins un rouleau de serrage supplémentaire (25) est prévu sur la partie supérieure du corps de bobine (15, 16), lequel génère une force de serrage dirigée contre les arbres moteurs (22, 24) sur le corps de bobine, afin que ce dernier ne tombe pas des arbres moteurs pendant l'enroulement.
  9. Dispositif selon l'une des revendications 7 ou 8 précédentes, caractérisé en ce que les arbres moteurs (22, 24) sont conçus avec un diamètre externe huit à quinze fois plus petit que celui du corps de bobine (15, 16).
  10. Dispositif selon l'une des revendications 7 à 9 précédentes, caractérisé en ce qu'est prévue une tête de guidage (35) qui guide l'objet oblong (11) pendant l'enroulement ou le déroulement, une unité d'avance étant coordonnée à cette tête de guidage (35), cette unité conférant à la tête de guidage (35) un déplacement par allers et venues parallèle à l'axe de rotation du corps de bobine (15, 16).
  11. Dispositif selon la revendication 10, caractérisé en ce que la tête de guidage (35), l'unité d'avance et les rouleaux de serrage (25) sont disposés dans un châssis d'installation (30) qui est disposé au-dessus du corps de bobine (15, 16) de façon réglable en hauteur.
EP98810257A 1997-04-14 1998-03-24 Procédé et dispositif d'enroulement ou de déroulement piloté d'un produit long sur respectivement à partir d'un corps de bobine Expired - Lifetime EP0873960B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CH00869/97A CH692341A5 (de) 1997-04-14 1997-04-14 Verfahren sowie eine Vorrichtung zum gesteuerten Auf- oder Abwickeln eines länglichen Gegenstandes auf einen bzw. von einem Spulenkörper.
CH869/97 1997-04-14
CH86997 1997-04-14
US09/059,445 US6012668A (en) 1997-04-14 1998-04-14 Method for the controlled winding or unwinding of an elongated object on or from a reel body

Publications (3)

Publication Number Publication Date
EP0873960A2 EP0873960A2 (fr) 1998-10-28
EP0873960A3 EP0873960A3 (fr) 1999-11-24
EP0873960B1 true EP0873960B1 (fr) 2004-02-25

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EP98810257A Expired - Lifetime EP0873960B1 (fr) 1997-04-14 1998-03-24 Procédé et dispositif d'enroulement ou de déroulement piloté d'un produit long sur respectivement à partir d'un corps de bobine

Country Status (2)

Country Link
US (1) US6012668A (fr)
EP (1) EP0873960B1 (fr)

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CH711119A2 (de) 2015-05-22 2016-11-30 Zurfluh Louis Vorrichtung zum gesteuerten Auf- oder Abwickeln eines Längselementes auf einen bzw. von einem Spulenkörper.
CN105502093A (zh) * 2016-01-17 2016-04-20 湖南江南四棱数控机械有限公司 往复式数控有芯纱团张力装置
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EP0873960A3 (fr) 1999-11-24
US6012668A (en) 2000-01-11
EP0873960A2 (fr) 1998-10-28

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