WO2008080558A1 - Système de transport pour pièces à usiner - Google Patents

Système de transport pour pièces à usiner Download PDF

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Publication number
WO2008080558A1
WO2008080558A1 PCT/EP2007/011157 EP2007011157W WO2008080558A1 WO 2008080558 A1 WO2008080558 A1 WO 2008080558A1 EP 2007011157 W EP2007011157 W EP 2007011157W WO 2008080558 A1 WO2008080558 A1 WO 2008080558A1
Authority
WO
WIPO (PCT)
Prior art keywords
drive
transport system
belt
drive means
workpiece
Prior art date
Application number
PCT/EP2007/011157
Other languages
German (de)
English (en)
Inventor
Sigmund Kumeth
Original Assignee
Sigmund Kumeth
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
Application filed by Sigmund Kumeth filed Critical Sigmund Kumeth
Publication of WO2008080558A1 publication Critical patent/WO2008080558A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
    • B23Q17/22—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring existing or desired position of tool or work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q7/00—Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting
    • B23Q7/14—Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting co-ordinated in production lines
    • B23Q7/1426—Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting co-ordinated in production lines with work holders not rigidly fixed to the transport devices
    • B23Q7/1447—Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting co-ordinated in production lines with work holders not rigidly fixed to the transport devices using endless conveyors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G17/00—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface
    • B65G17/12—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface comprising a series of individual load-carriers fixed, or normally fixed, relative to traction element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G17/00—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface
    • B65G17/22—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface with oppositely-moving parts of the conveyor located in a common plane and being formed by individual load carriers only

Definitions

  • the present invention relates to a transport system, in particular a transport system for an assembly and / or processing plant, for objects of any kind to be mounted or machined (hereinafter referred to as "workpieces") Furthermore, the invention relates to a method for transporting workpieces, in particular
  • the workpieces are, for example, components or assemblies to be assembled or machined, or other objects to be mounted or processed, such as paper to be printed.
  • Assembly and processing systems are known in different versions.
  • assembly systems are known in which workpiece holders are moved past on a closed conveyor line at several workstations at which the production or assembly of the components or assemblies is then carried out in several steps, on these recordings, this each with high precision at each workstation must be positioned
  • form-fitting transmissions such as traction drives, such as chain drives or toothed belt drives
  • traction drives such as chain drives or toothed belt drives
  • form-fitting profiling eg gear
  • rotary indexing and longitudinal transfer systems are known from the prior art, which can be used for the transport of workpieces and for the positioning of workpiece holders on such workstations.
  • a belt in the form of a toothed belt is controlled by means of a switching stepping device or the like.
  • the number of available target positions is u.a. determined by the step used.
  • the deviations in the strip length resulting during tightening of the strip can only be partially compensated by adjusting the switching step.
  • the desired and actual achievable target positions often do not match exactly.
  • the error tolerances of the belt and the shift pawl add up in a manner which makes high-precision positioning of workpieces very difficult.
  • An object of the present invention is a
  • the transport system comprises a drive, a frictionally cooperating with the drive drive means, a number by means of the drive means movable workpiece holders, a measuring unit for determining a position at least one of the workpiece holders and / or a position of the drive means and a control unit for controlling the drive in Dependence on the position determination.
  • a first basic idea of the invention is to use a drive means in the manner of a frictional traction mechanism drive for the transport of the workpiece holders.
  • traction drives are gearboxes where a torque is transmitted between two axially parallel waves by means of a both shaft ends wrapped around the traction means, here only a drive of the "traction means" takes place through a first shaft, without it depends on a torque transmission to a second shaft.
  • a belt is understood to mean an elongated strip of a more or less flexible material, the two ends of which are connected and which is used to transmit forces or torques.
  • Flat belts achieve a particularly high degree of efficiency. In order to prevent that flat belts from the discs (drive pulley, clamping pulley) run, they can be made more or less spherical. The belts then center automatically.
  • the terms “belt” and “belt” are used interchangeably.
  • V-belts can transmit much larger forces than flat belts with the same footprint. Due to the higher friction and the forces on the bearings are much lower. Instead of a drive pulley with a flat pad is often used to drive a V-belt a disc with a wedge-shaped groove.
  • Components are free of component-specific positioning elements (e.g., teeth or holes in the belt, etc.).
  • Essential to the invention is that the belt can take any position without being limited by predetermined positioning elements in its free position choice.
  • Positioning elements rigidly fixed positioning of the workpiece holders according to the requirements of each case possible.
  • Using a belt as a drive means quiet and quiet running, low maintenance (no lubrication), comparatively low cost, short-term overload capability (belt slippage) and high rotational speeds (rotational speeds).
  • the desired high-precision positioning can be achieved.
  • all components can have tolerances.
  • the drive means (belt, belt) can have a length tolerance of up to several millimeters demonstrate.
  • the tensioning of the belt has no influence on the precision of the transport system.
  • the decisive factor is that after the tensioning of the belt, an initialization of the transport path is made.
  • the position of at least one of the workpiece holders (and / or the belt) is determined by a measuring unit.
  • the tape runs a full revolution or a plurality of revolutions until the original position of the workpiece holder (or the band) is reached again.
  • the length of the tape and thus the total existing transport path is determined and can be used in the control unit of the drive for an assignment of motor rotation (rotation of the drive pulley) on the one hand and movement of the drive means (belt, belt) on the other.
  • Another basic idea of the invention is to use a direct drive as the drive.
  • the motor is designed to operate directly with the speed of the drive pulley.
  • the use of such a direct drive not only eliminates a gearbox, which reduces wear, noise and oil loss of the drive. At the same time, the required space is reduced by the integrated design.
  • FIG. 3 shows the transport system according to the invention from FIG. 2 (perspective from below), FIG.
  • Fig. 4 shows the transport system according to the invention from Fig. 2 (top view) and
  • Fig. 5 is a detail view of a workpiece holder with tape
  • FIGS. 2 to 4 a simple concentricity transport system is shown (cf., FIGS. 2 to 4), in which twelve
  • Workpiece receivers 5 in the form of receiving carriage with the help of four guide rollers 11 on .einer guide or support rail 12 are guided.
  • the course of the mounting rail 12 indicates the path of movement of the workpiece holders 5.
  • the support rail 12 has a cross-section on a sword profile and is located between two pairs of guide rollers of a receiving carriage (see Fig. 5).
  • One of the outer guide rollers 11 has a projection 13 to which a vertically downwardly extending holder 14 is attached.
  • two clamping pieces 16 are provided, which are bolted to the holder 14.
  • steel band is clamped, as shown by way of example in Fig. 5.
  • the steel strip 3 acts frictionally with the drive pulley 18 of the drive 2, here an electric motor, together.
  • the use of steel, especially spring steel, as strip material reduces the sensitivity to external influences (oil, gas, temperature, dirt, water, dust).
  • Spring steel bands are particularly durable, light and hardly stretchy.
  • the tensile slip is drastically reduced by the use of steel as strip material. Therefore, a steel strip is well suited for precision positioning as in the present case.
  • the steel strip 3 is designed in the present example as a flat band.
  • the surfaces of the drive pulley 18 and des Bandes 3 are essentially smooth. In any case, they have no subdivisions or positioning elements.
  • the vertical distance between the clamping pieces 16 to each other is selected such that the drive pulley 18 and the drive pulley 18 opposite clamping disc 19 engage in the resulting gap 21 and the Band 3 can drive via a friction. Since the band 3 is firmly clamped to the holder 14, the twelve receiving carriage 5 are taken in the transport direction 4 by the movement of the belt 3. The tensioning of the belt 3 is effected by a displacement of the tensioning pulley 19. The tensioning pulley 19 also serves for deflecting the steel belt 3 during operation. Alternatively, it is possible to tension the band 3 by a corresponding displacement of the drive pulley 18.
  • the drive pulley 18 is formed in the illustrated embodiment as part of a direct drive.
  • the direct drive is usually a special form of servo drive, usually in the form of a three-phase, brushless synchronous motor with permanent excitation.
  • servo drive usually in the form of a three-phase, brushless synchronous motor with permanent excitation.
  • the desired movements take place directly, ie without prior
  • a direct drive 2 is preferably a "switched reluctance machine".
  • Electric motor 2 used in particular, a high-pole edge effect reluctance machine is used.
  • the motor used is a brushless servomotor without permanent magnets. It is equipped with a cross roller bearing with high rigidity and accuracy as well as a lifetime lubrication and thus offers high availability and maintenance-free operation.
  • Motor 2 and control unit 8 of the motor 2 are designed so that they allow a motor drive with a resolution of several 100,000 pulses per revolution. As a result, any desired rotational position of the motor 2 can be approached with a very high repeatability of a few angular seconds. With the aid of the motor 2, accelerations on the order of 80 to 120 s "2 can preferably also be realized.
  • the system may be sized to require about ten revolutions of the drive pulley 18 for a belt revolution.
  • the system may be sized to require about ten revolutions of the drive pulley 18 for a belt revolution.
  • the tape 3 can be stopped at 8,000,000 different target positions.
  • a reference travel takes place, in which the length of the Bandes 3 and thus the future target positions are set in relation to the control pulses of the motor 2.
  • the measuring unit 7 determines for this purpose the position of a selected workpiece carrier X '.
  • a zero position is defined After passing through one revolution, this zero position is again reached by the workpiece carrier X 'The workpiece carrier X' is again detected by the measuring unit 7.
  • the number of pulses for one revolution is defined "Zero position” does not necessarily require a fixed “stop", however, such a fixed stop may be provided.
  • measuring unit 7 different measuring systems can be used. Magnetic systems, for example, in which magnetic strips attached to the workpiece holders 5 have been detected by a stationary sensor, have proven to be useful. In the present example, an optical measuring unit 7 is used, which forms an "optical probe" for detecting a workpiece holder 5 with the aid of a combined laser transmitter / receiver unit 22
  • Measurement results of the measuring unit 7 are transmitted to the control unit 8 and there - possibly after signal conversion, etc. - processed and used to control the motor 2 in dependence on the position determination.
  • the workpiece holders 5 are firmly connected to the band 3, ie not articulated or the like.
  • the once defined positions of the individual workpiece carriers on the belt therefore no longer change.
  • a future control of the target positions of the workpiece holders 5 can thus take place solely on the basis of the tape position, ie by the control of the motor 2 with a certain number of control pulses by the control unit 8.
  • Particularly simple is the positioning of the individual workpiece holders 5, if they are connected at regular intervals with the band 3.
  • any change in the tape length can be compensated for directly and automatically, for example by an automatic adaptation of the number of control pulses required for the respective positioning by the control unit 8.
  • the mechanical error is reduced solely to the tolerance of the drive pulley 18.
  • a possible slippage of the belt 3 is prevented by suitable material (steel).
  • the transport system 1 is a self-controlling system in which the measuring unit 7 determines the position of at least one workpiece holder 5 or of the band 3 at regular intervals (for example at each cycle).
  • an automatic correction of the slip is possible with the aid of an electronic control 8.
  • This self-control preferably takes place at each start-up of the transport system 1 and at the same time even in a number of predefined occasions, for example, when shifted by collision workpiece holders 5 or the like.
  • the complexity of the drive train as a whole is reduced.
  • the rotational angle of the drive need not - as in the prior art - be known in advance. They are rather freely programmable, so that any positions can be approached. Retooling and downtime, which were required in conventional systems with angular changes, can be eliminated. New target positions can be defined in a simple and fast way by reprogramming the control unit.
  • the direct drive 2 also has a built-in position sensor 23 (see Fig. 1), with the aid of the control unit 8, the current position of the drive pulley 18 is transmitted in each case.
  • a completely closed control loop is provided, with the aid of which previously unknown positioning accuracies can be achieved.
  • a transport system for example, the complete production of a complicated component or a complex assembly or editing, for example, a printing of workpieces made of paper, cloth or other material to successively arranged printing machines with high timing and precision done.
  • a check can be made in addition to or instead of an assembly and / or a processing.
  • preferably ring and oval guide systems can be realized when using appropriate guide or support rails 12, wherein the workpiece holders (slide), for example, run on a rectangular or oval course with arbitrarily long lines.
  • machine parts, electrical or optical components, electronic components, semiconductor components, etc. may be used as workpieces.
  • the band 3 may also be circular or S-shaped in further embodiments of the invention.
  • An S-shaped course of the band 3 would be particularly useful for example for a transport of workpieces in a drying chamber for paints or the like.
  • the attachment of the band 3 to the workpiece holders 5 vary. Particularly in the case of an S-shaped course of the band 3, the clamping of the band takes place
  • the clamping of the band 3 would then be done, for example, only one side between the inner side 17 of the upper clamping piece 16 and the inner side 15 of a greatly shortened holder 14, which terminates substantially with the lower edge of the clamping piece 16.
  • Workpiece holders 5, the type of guide 12, etc. differ from the example shown here.
  • the used guide 12 is not continuous, but only provided on sections of the band.

Abstract

La présente invention concerne un système de transport pour pièces à usiner. En outre, l'invention concerne un procédé de transport de pièces à usiner. L'objectif est de permettre un positionnement particulièrement précis des pièces à usiner. A cet effet, un système de transport comprend un entraînement (2), des moyens d'entraînement (3) coopérant par entraînement par friction avec l'entraînement (2), un certain nombre de logements de pièces à usiner (5) pouvant être déplacés à l'aide des moyens d'entraînement (3), une unité de mesure (7) destinée à déterminer une position au moins d'un des logements de pièces à usiner (5) et/ou une position des moyens d'entraînement (3) et une unité de commande (8) destinée à commander l'entraînement (2) en fonction de la détermination de la position.
PCT/EP2007/011157 2006-12-29 2007-12-19 Système de transport pour pièces à usiner WO2008080558A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006062530.7A DE102006062530B4 (de) 2006-12-29 2006-12-29 Transportsystem für Werkstücke
DE102006062530.7 2006-12-29

Publications (1)

Publication Number Publication Date
WO2008080558A1 true WO2008080558A1 (fr) 2008-07-10

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/011157 WO2008080558A1 (fr) 2006-12-29 2007-12-19 Système de transport pour pièces à usiner

Country Status (2)

Country Link
DE (1) DE102006062530B4 (fr)
WO (1) WO2008080558A1 (fr)

Cited By (1)

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CN110682135A (zh) * 2019-11-06 2020-01-14 杭州优固光电有限公司 一种灯罩打孔装置

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DE102009010191A1 (de) 2009-02-23 2010-08-26 Kolbus Gmbh & Co. Kg Buchbindemaschine
RU2649859C2 (ru) * 2013-06-25 2018-04-05 Тетра Лаваль Холдингз Энд Файнэнс С.А. Система и способ транспортировки упаковочных контейнеров
DE102013112720A1 (de) * 2013-11-19 2015-05-21 Teamtechnik Maschinen Und Anlagen Gmbh Werkstückträger und Montageanlage
CN109079564B (zh) * 2018-09-17 2020-07-31 芜湖市天宏精密锻造有限公司 一种轴承加工自动送料装置
IT202200010853A1 (it) * 2022-05-25 2023-11-25 Marchesini Group Spa Sistema di trasporto di prodotti mediante una cinghia dentata ad anello chiuso con asse di azionamento verticale

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US5324957A (en) * 1993-06-30 1994-06-28 Eastman Kodak Company Belt position sensor
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US4609091A (en) * 1982-08-09 1986-09-02 Dorner Mfg. Corp. Storage unit for a conveyor system
US5199268A (en) * 1992-02-06 1993-04-06 Post-Harvest Technologies, Inc. Automatic in-feed conveyor system for an ice injector system
US5324957A (en) * 1993-06-30 1994-06-28 Eastman Kodak Company Belt position sensor
US6201203B1 (en) * 1999-05-12 2001-03-13 Northrop Grumman Corporation Robotic containerization system
US20030029700A1 (en) * 2001-08-07 2003-02-13 Miller Jack E. Indexing conveyor with operable part retaining mechanism
WO2006078890A2 (fr) * 2005-01-19 2006-07-27 Thermodrive Llc Courroie de transport a entrainement direct et a faible frottement

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110682135A (zh) * 2019-11-06 2020-01-14 杭州优固光电有限公司 一种灯罩打孔装置
CN110682135B (zh) * 2019-11-06 2020-07-28 杭州联周科技有限公司 一种灯罩打孔装置

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Publication number Publication date
DE102006062530B4 (de) 2016-06-23
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