WO2011020834A1 - Einrichtung zur erzeugung einer translationsbewegung - Google Patents
Einrichtung zur erzeugung einer translationsbewegung Download PDFInfo
- Publication number
- WO2011020834A1 WO2011020834A1 PCT/EP2010/061979 EP2010061979W WO2011020834A1 WO 2011020834 A1 WO2011020834 A1 WO 2011020834A1 EP 2010061979 W EP2010061979 W EP 2010061979W WO 2011020834 A1 WO2011020834 A1 WO 2011020834A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ball screw
- movement
- rotor
- spindle
- motor
- 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.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/08—Biaxial stretching during blow-moulding
- B29C49/10—Biaxial stretching during blow-moulding using mechanical means for prestretching
- B29C49/122—Drive means therefor
- B29C49/123—Electric drives, e.g. linear motors
Definitions
- the present invention relates to a device according to the preamble of patent claim 1, in particular for use for the stroke control of a stretch rod of a blow molding machine.
- the present invention relates to a device for generating a translational movement with an electric motor, which in turn has a rotor, wherein the rotational movement generated by the rotor is transformed into a translational movement.
- the invention thus relates to a drive solution for linear axes.
- the belt drive, crank drive, ball screw drives (KGT) or linear direct drives are known as drives.
- Linear direct drives (or linear electric motors) play a major role today for virtually all types of machines.
- the linear motor operates without transformation of a rotational movement in a translational movement and can be pictorially illustrated by processing a rotating three-phase motor on a plane.
- linear direct drives also have disadvantages, such as the high system price, the high power loss associated with Strong warming of the machine structure and strong magnetic fields and lack of power transmission and the large space on.
- Advantages of the linear direct drives are high positioning accuracy and simultaneously high control dynamics.
- feed rate, acceleration and dynamic feed force high-speed ball screws (H-KGT) are competitive with linear direct drives with less overall outlay in the machine tool industry.
- KGT drives generally consist of an electric motor, a ball screw drive and a measuring system for determining the position of the movable frame elements.
- the ball screw uses balls as rolling elements and serves to convert a rotary movement into a translatory movement (eg stroke movement). Due to the spot installation of the balls, the drive power is reduced enormously, there is less wear of the raceways and the achievable travel speed and the positioning accuracy is increased. This entails lower maintenance costs, shorter processing times and lower reject rates.
- Main field of application of the ball screw are machine tools, in which the part to be moved is fastened to the nut of the ball screw and at the same time supported by linear guides.
- a motor drives the spindle of the KGT either directly or via gears and belt drives. Between spindle and nut balls roll as rolling elements in grooves, which migrate axially when turning the spindle. Ideally, the revolving balls touch (without play) both flanks of the thread at one point each.
- the characteristic features of the KGT are the pitch of the spindle, measured as the distance covered (stroke) of the spindle nut per revolution of the spindle. The feed then results from the product of slope and speed.
- DE 10 2007 008 023 A1 proposes a method and a device for blow-molding containers in which a preform made of a thermoplastic material, for example PET (polyethylene terephthalate), is thermally conditioned (heated) within one Blow mold stretched by a stretch rod and is transformed by blowing pressure into the container.
- a preform made of a thermoplastic material for example PET (polyethylene terephthalate)
- PET polyethylene terephthalate
- a servomotor to the motor shaft, a threaded rod is attached, which in turn is connected via a coupling element (threaded bushing) with a Reckstangenpronounced, on which in turn the stretch rod is attached.
- the coupling of the servo motor via the threaded rod, the threaded bushing and the stretch rod carrier with the stretching rod can provide a system which is rigid in relation to external loads and yet highly dynamic. From the metrological detection of the motor current of the servomotor, the stroke control of a stretch rod in response to a given positioning profile or a predetermined force profile. A similar solution for the stroke control of a stretch rod of a blow molding machine is proposed by EP 0 577 384 A1.
- a disadvantage of the known stroke control by means of ball screw drive and servomotor drive are the low control dynamics and the larger construction volume. It is therefore desirable to provide a device for generating a translational movement, in particular for the stroke control of a stretch rod of a blow molding machine, which has the advantages of a Direct drive solution and a KGT solution combines and thus the highest possible energy efficiency with high control quality and low cost and maintenance-free as possible compact mechanical design.
- the invention essentially relates to the approach of making a ball screw as part of a direct drive, so that no mechanical coupling is required.
- the rotor of the electric motor of the device according to the invention is designed as a nut of the ball screw, and that a spindle provided inside the nut of the ball screw is designed as a transmission element of the translational movement, in particular as a lifting rod for generating stroke. is seen.
- the spindle of the ball screw is generally the ball screw, which for example itself forms the lifting rod or is connected to a tool (stretching rod) in order to produce or execute a translatory movement (lifting movement).
- the feature according to which the rotor of the electric motor is designed as a nut of the ball screw should also include the configuration in which the nut of the ball screw rotates together with the rotor. So it's not one-piece training of rotor and nut necessary.
- the spindle can be secured by guides against rotation.
- the mother rotating together with the rotor should be held in position by means of corresponding bearings so that the spindle can move through and thus execute the translatory movement.
- the stretch rod can be attached directly to the ball screw of the ball screw (KGT).
- the lifting device uses a known electric motor (torque motor) with a stator winding and an internal rotor.
- a known electric motor torque motor
- an AC motor in particular a servomotor
- a torque motor used.
- the rotor (KGT nut) is preferably constantly magnetized (by permanent magnets) and is driven by a moving magnetic rotating field in the surrounding stator (synchronous motor).
- KGT nut is used as a rotor and performs no translatory movement itself. It is rotatably mounted in the machine frame, so that the ball screw located in its interior is set in a translational movement (lifting movement). By positioning a workpiece or a tool carrier to this spindle, the workpiece or tool can now be moved translationally.
- a servomotor is advantageously used, the operation of which can be torque-controlled, speed-controlled and / or position-controlled. This allows adaptation to different applications.
- a torque motor As a special servomotor here the use of a torque motor is cited, the one gearless direct drive with high torques and low speeds represents.
- the torque motor can be considered as a large servomotor with hollow shaft, which is optimized for high torques. Torque motors allow use for fast and accurate positioning and positioning tasks.
- the torque motor for the device according to the invention for generating a translational movement, in particular for the stroke control of a stretch rod of a blow molding machine, particularly well suited.
- a decentralized inverter with decentralized intelligence is used.
- the decentralized inverter can have the electronics for motor control as well as for logic processing. In this way, the processing of I / Os and of sensor signals can take place decentrally directly in the drive and thus a modular machine concept can be realized. Motor, governor and axle mechanics merge into one unit in this way. In this way, a larger number of identically constructed units (for example units for stretching bar control) can be made available and hung on a main controller.
- Advantages of the device according to the invention for generating a translation movement are the high integration density and thus the compact low-wear design with low costs and high energy efficiency.
- the application is particularly effective in applications that require high control quality and control dynamics.
- the aforementioned modular system solution has the advantage of decentralized processing of I / Os and can accommodate the motion functionality directly in the drive. i / 13 -
- FIG. 1 shows a device for generating a translatory movement in an advantageous embodiment
- Figure 2 shows schematically an arrangement with several means for generating a translation movement with decentralized controllers.
- Figure 1 shows a very schematic view of a device 1 in particular for Huberzeugung.
- the device 1 shows an electric motor 2, in particular torque motor, with the following components:
- the machine frame 7 includes the stator (stator winding) 6 and encloses the rotor 4, which is used as a nut of a ball screw.
- the rotor 4 is rotatably supported in the machine frame 7 via the bearing 9.
- the ball screw itself is designated 3.
- the spindle of the ball screw 3 is denoted by 5.
- a motor encoder 8 is connected to an electronic unit 10 via a line 13 for logic processing in operative connection.
- the electronics 10 is also connected to the engine 2 via a line 12 for engine control in operative connection.
- the electronics 10 is a decentralized inverter that combines the electronics for motor control and for logic processing.
- the rotor 4 (which is identical here with the ball screw nut 4) rotates at a predetermined speed in a predetermined direction of rotation about its own longitudinal axis.
- the ball screw 3 performs in its interior in a known and detailed manner above a spindle 5 (ball screw), which can also be referred to as a lifting rod or used in this case.
- the spindle 5 performs a translatory movement in the direction of its axis. The resulting stroke movement can be controlled or controlled by driving the motor 2.
- the feed of the spindle 5 results from the product of motor speed and pitch of the ball screw 3.
- the device 1 In addition to the lifting movement, the device 1 generates a rotational movement of the spindle 5 about its own longitudinal axis.
- the device shown is characterized by high integration density (no mechanical couplings) and thus by the compact and low-wear design at low cost and high energy efficiency.
- the application is particularly effective in applications that require high control quality and control dynamics.
- the possibility of the modular building block solution already mentioned in the description has the advantage of the decentralized processing of I / Os (via the lines 12 and 13 for motor control or logic processing) and can thus accommodate the motion functionality directly in the drive. Further emphasized are the high positioning dynamics and positioning accuracy.
- the device 1 shown in Figure 1 there is a fixed relationship between the lifting movement of the spindle 5 and its rotational movement (rotation about its longitudinal axis). The additional rotational movement may be advantageous for certain applications.
- the spindle 5 is designed as a lifting rod, which in turn can be connected to a stretch rod or formed directly as a stretching rod.
- Blowing air possibly cooling air
- Typical requirements for the use of the illustrated device 1 in the stroke control of a stretch rod of a blow molding machine are a travel distance (in the axial direction, indicated by the double arrow in the figure) of 30 to 50 cm, in particular 40 cm , a speed of about 2.0 m / s, a moving mass of about 8 to 10 kilograms, in particular 9 kilograms, a stretching force of 1600 to 2000 N (carriage above) and a blowing force of 1000 N (carriage below) ,
- the drive should be optimally designed so that a positioning accuracy of approx. 0.5 mm can be achieved when stretching with a stretching force between 1600 and 2000 N and a positioning accuracy of 0.2 mm during the blowing process.
- the travel results at a known angular velocity of the number of revolutions multiplied by the spindle pitch of the ball screw 3rd
- FIG. 1 shows schematically an arrangement with several Huber Wegungs wornen with decentralized controllers. Shown are the first two lifting devices 111 and 112 of a number of lifting devices.
- the associated decentralized electronics or controllers are denoted by 101 and 102, the lines for motor control are denoted by 121 and 122, respectively.
- the subsystems consisting of the elements designated 111, 101 and 121 or 112, 102, 122 substantially coincide with the lifting device 1 of FIG.
- FIG. 2 additionally shows the integration of local sensors 141 or 142 and local actuators 151 and 152, respectively, which are connected to the decentralized controllers 101, 102 via a corresponding standard for the transmission of time-relevant data (eg Sercos III).
- the individual decentralized controllers / electronics 101, 102,... are in turn connected to a central electronic unit 16 via a corresponding standard for the transmission of time-relevant data (eg Sercos III). This in turn is controlled by a multimaster 17.
- time-relevant data eg Sercos III
- the possibility of the modular box solution shown in FIG. 2 has the advantage of decentralized processing of I / Os and can thus accommodate the motion functionality directly in the drive. In this way, local I / Os can be evaluated and individual stretching units 131, 132,... Controlled for a decentralized, on the other hand together to a central electronics 16 for overarching control and / or control. LIST OF REFERENCE NUMBERS
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Transmission Devices (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ATA9283/2010A AT513002B1 (de) | 2009-08-17 | 2010-08-17 | Einrichtung zur Erzeugung einer Translationsbewegung |
| CN201080036366.4A CN102474155B (zh) | 2009-08-17 | 2010-08-17 | 用于产生平移运动的装置 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102009028602.0 | 2009-08-17 | ||
| DE102009028602 | 2009-08-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2011020834A1 true WO2011020834A1 (de) | 2011-02-24 |
Family
ID=43302082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2010/061979 Ceased WO2011020834A1 (de) | 2009-08-17 | 2010-08-17 | Einrichtung zur erzeugung einer translationsbewegung |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN102474155B (de) |
| AT (1) | AT513002B1 (de) |
| DE (1) | DE102010039414A1 (de) |
| WO (1) | WO2011020834A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110345218A (zh) * | 2019-07-14 | 2019-10-18 | 上海保良精密传动设备有限公司 | 一种端盖循环两沟道滚珠花键副及加工工艺 |
| CN110345217A (zh) * | 2019-07-14 | 2019-10-18 | 上海保良精密传动设备有限公司 | 一种内循环四沟道滚珠花键副及加工工艺 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0577384A1 (de) | 1992-06-29 | 1994-01-05 | Hoover Universal,Inc. | Servostreckanordnung für eine Blasformmaschine |
| DE4320205A1 (de) * | 1993-06-18 | 1994-12-22 | Fichtel & Sachs Ag | Stellantrieb für eine Kraftfahrzeug-Reibungskupplung |
| US5742143A (en) * | 1995-01-20 | 1998-04-21 | Kabushiki Kaisha Sankyo Seiki Seisakusho | Motor control system with selectively operated A/D convertor |
| DE19857805A1 (de) * | 1998-12-15 | 2000-06-21 | Uwe Plettenberg | Hochdynamische Lineareinheit mit integriertem Elektroantrieb |
| WO2008098565A2 (de) * | 2007-02-15 | 2008-08-21 | Khs Corpoplast Gmbh & Co. Kg | Verfahren und vorrichtung zur blasformung von behältern unter verwendung eines servomotors für die reckstange |
| DE102007008023A1 (de) | 2007-02-15 | 2008-08-21 | Sig Technology Ag | Verfahren und Vorrichtung zur Blasformung von Behältern |
-
2010
- 2010-08-17 WO PCT/EP2010/061979 patent/WO2011020834A1/de not_active Ceased
- 2010-08-17 CN CN201080036366.4A patent/CN102474155B/zh not_active Expired - Fee Related
- 2010-08-17 DE DE102010039414A patent/DE102010039414A1/de not_active Withdrawn
- 2010-08-17 AT ATA9283/2010A patent/AT513002B1/de not_active IP Right Cessation
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0577384A1 (de) | 1992-06-29 | 1994-01-05 | Hoover Universal,Inc. | Servostreckanordnung für eine Blasformmaschine |
| DE4320205A1 (de) * | 1993-06-18 | 1994-12-22 | Fichtel & Sachs Ag | Stellantrieb für eine Kraftfahrzeug-Reibungskupplung |
| US5742143A (en) * | 1995-01-20 | 1998-04-21 | Kabushiki Kaisha Sankyo Seiki Seisakusho | Motor control system with selectively operated A/D convertor |
| DE19857805A1 (de) * | 1998-12-15 | 2000-06-21 | Uwe Plettenberg | Hochdynamische Lineareinheit mit integriertem Elektroantrieb |
| WO2008098565A2 (de) * | 2007-02-15 | 2008-08-21 | Khs Corpoplast Gmbh & Co. Kg | Verfahren und vorrichtung zur blasformung von behältern unter verwendung eines servomotors für die reckstange |
| DE102007008023A1 (de) | 2007-02-15 | 2008-08-21 | Sig Technology Ag | Verfahren und Vorrichtung zur Blasformung von Behältern |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102474155A (zh) | 2012-05-23 |
| CN102474155B (zh) | 2015-04-29 |
| AT513002A5 (de) | 2013-12-15 |
| AT513002B1 (de) | 2014-05-15 |
| DE102010039414A1 (de) | 2011-02-24 |
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