EP1032536B1 - Regelungsverfahren für eine schraubspindel - Google Patents

Regelungsverfahren für eine schraubspindel Download PDF

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Publication number
EP1032536B1
EP1032536B1 EP98956938A EP98956938A EP1032536B1 EP 1032536 B1 EP1032536 B1 EP 1032536B1 EP 98956938 A EP98956938 A EP 98956938A EP 98956938 A EP98956938 A EP 98956938A EP 1032536 B1 EP1032536 B1 EP 1032536B1
Authority
EP
European Patent Office
Prior art keywords
pressure
spindle
screwing
piston
tightening
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
EP98956938A
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English (en)
French (fr)
Other versions
EP1032536A1 (de
Inventor
Bertrand Gruson
Gérard OLIEVE
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.)
Serac Group SAS
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Serac Group SAS
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Filing date
Publication date
Application filed by Serac Group SAS filed Critical Serac Group SAS
Publication of EP1032536A1 publication Critical patent/EP1032536A1/de
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Publication of EP1032536B1 publication Critical patent/EP1032536B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67B—APPLYING CLOSURE MEMBERS TO BOTTLES JARS, OR SIMILAR CONTAINERS; OPENING CLOSED CONTAINERS
    • B67B3/00—Closing bottles, jars or similar containers by applying caps
    • B67B3/20—Closing bottles, jars or similar containers by applying caps by applying and rotating preformed threaded caps
    • B67B3/2073—Closing bottles, jars or similar containers by applying caps by applying and rotating preformed threaded caps comprising torque limiting means

Definitions

  • the present invention relates to a method of control of a screw spindle such as those used for fitting screw caps on packaging with threaded necks. Such a process is described in document CH 637 600 A.
  • screwing pins such as described in document FR-A-2,754,750, published on 24.04.1998, which include a linear cylinder having a piston connected to a spindle shaft to drive it in rotation.
  • a commonly used process used for the control of such pins consists of subject the piston to a differential pressure of tightening generating the required tightening torque of the plug on the neck of the packaging.
  • the tree of spindle then acquires a high rotational speed and, from the makes inertia the spindle tree stores energy important kinetics.
  • the kinetic energy thus stored causes a rapid screwing of the cap until the moment when it comes to a stop, which causes the sudden stop of the spindle shaft.
  • the kinetic energy stored is returned by application to the cap under the form of a dynamic couple, greater than the couple of tightening required.
  • This dynamic couple risks causing deterioration of the packaging cap or neck, or to oblige a user of the packaging to use a tool to loosen the cap.
  • An object of the invention is to propose a method control of the screw spindle allowing obtaining precise the required tightening torque.
  • a method of controlling a spindle screwing including a step of feeding the spindle screwing in fluid under nominal pressure conditions and flow generating a required tightening torque and a previous step during which the screw spindle is powered under conditions below the conditions nominal in sufficient proportion that the spindle shaft has a rotational speed generating kinetic energy producing less torque than tightening torque required.
  • the piston is subjected during the step prior to an average differential pressure less than a differential clamping pressure.
  • the average differential pressure ensures the rotation of the spindle shaft at a speed weak resulting in weak energy accumulation kinetic.
  • the resistant torque opposing the screwing is then sufficient to prevent the rotational speed of the spindle increases so that the plug stops as soon as the resisting torque is equal to the motor torque corresponding to clamping pressure. There is therefore no refund brutal kinetic energy so the couple of effective tightening applied to the plug is equal to the torque of tightening required.
  • one face of the piston is subjected in a screwing direction to a constant pressure lower than the differential clamping pressure.
  • the piston is subjected to constant pressure in one direction screwing, and at a back pressure.
  • the average differential pressure is then equal to the difference between the constant pressure applied to the face of the piston and back pressure.
  • the constant pressure is equal to the clamping pressure.
  • a single pressure level, corresponding to the torque of tightening required, is then necessary. The regulation of cylinder fluid pressure is simplified.
  • the piston is subjected intermittently to a pressure of constant value.
  • the rotation of the spindle is initiated by the pressurization and the kinetic energy is restored during the pressure cut-off times so that it is possible to control the spindle speed in acting on the pressurization times and the pressure cut.
  • the pressure differential has a constant value equal to the pressure Clamping.
  • the screw pin controlled according to the method of the invention has a structure and a functioning known per se and some of its elements have not been represented.
  • it includes a guide tube vertical 1 fixed to a spindle support 2 and sliding vertically in a sleeve 3 secured to a platform rotary 4.
  • the tube 1 rotatably receives a spindle shaft 5, the lower end of which protrudes from the tube 1 and carries a jaw gripper 6.
  • the end upper part of spindle shaft 5 carries a bevel gear 7 cooperating with an engine assembly generally designated as 11.
  • Spindle holder 2 is mounted to slide on a column 9 fixed to the rotary platform 4 and carries a roller 8 intended to cooperate with a cam of a frame fixed to position the support 2 and the parts in height associated with it.
  • a support plate 10 is fixed on the side of the spindle support 2 and carries the motor assembly 11.
  • the motor assembly 11 comprises an intermediate shaft 12 rotatably mounted in a bearing 13 carried by the support plate 10.
  • the shaft 12 has one end bearing, by via a free wheel 45, a return pinion conical 14 whose teeth are in contact with those of the pinion 7, and an opposite end carrying a pinion input 15 whose teeth are in contact with those of a rack 16.
  • rack 16 is fixed by its lower end to the rod of a jack 17 whose body is fixed to the support plate 10.
  • the jack 17 conventionally comprises a piston 18 mounted to slide in the cylinder body and define two chambers 19, 20 inside of it.
  • the jack 17 is connected to a control unit generally designated by 21. It will be understood that in this type of installation the couple applied to the spindle when it is blocked depends directly from the differential pressure at which the piston 18 is subjected.
  • the control member 21 comprises a monostable distributor 22 controlled by a control input 24 between a screwing position in which the chamber 19 is set the exhaust while the chamber 20 is connected to a power input 23 and a return position in which the chamber 19 of the jack 17 is placed in communication with the feed inlet 23 of the distributor 22 while the chamber 20 is exhausted.
  • the entrance 24 is connected to a first sensor (not shown) of the position of the screw spindle with respect to to the fixed frame.
  • a monostable distributor 25 is disposed between power inlet 23 and two air sources under pressure, an air source at the clamping pressure PS corresponding to a required tightening torque and a source of air at a pressure P lower than the pressure PS.
  • the valve 25 is controlled by a control input 26 between a low pressure supply position in which the pressure source P is connected to the input supply 23 while the pressure source PS is closed, and a supply position at the pressure of tightening in which the pressure source P is closed while the pressure source PS is connected to the inlet supply 23.
  • the control input 26 is connected to a second screw spindle position sensor by compared to the fixed frame.
  • the platform 4 is driven in rotation relative to the fixed frame by a motor. of the packaging with threaded necks are brought successively and are kept in line with the gripping device at jaws 6 previously provided with a plug.
  • the distributor 22 When passing a first position of the spindle relative to the frame, the distributor 22 is brought by the control input 24 in the screwing position while the distributor 25 remains in the feeding position low pressure. Air at pressure P is then brought into the chamber 20 of the jack 17 and is exerted on the corresponding face of the piston. The rod of the jack 17 pushes the rack 16 upwards. The rack 16 drives in rotation the input pinion 15 which transmits its movement to the gripping device 6 via shaft 12, pinions 14 and 7, and spindle shaft 5 pivoting in the guide tube 1. Note that the pressure P is less than the clamping pressure PS in a sufficient proportion for the spindle shaft 5 to have a speed of rotation generating kinetic energy producing a torque lower than the required tightening torque.
  • the spindle continues to move relative to the frame by rotation of the platform 4.
  • the distributor 25 is brought by the control input 26 to the position supply at the clamping pressure. Air to the clamping pressure PS is then introduced into the chamber 20.
  • the second position determining the start of feeding of chamber 20 by the air at the clamping pressure PS is defined so that the resistant torque then opposing the screwing of the cap on the threaded neck is sufficient to prevent that under the action of the clamping pressure, the speed of rotation of the spindle shaft 5 increases until it generates a sufficient kinetic energy to produce a torque greater than the required tightening torque.
  • the distributor 25 is returned to the low pressure supply position, and the distributor 22 is returned to the return position.
  • Of air at pressure P is then introduced into the chamber 19 of the jack 17 so that the jack is retracted.
  • Wheel free 45 associated with the pinion 14 allows retraction of the cylinder without unscrewing the cap.
  • the control member 21 comprises a bistable distributor 30 disposed between an air source at the clamping pressure PS and the supply inlet 23 a distributor 22 identical to that of the first mode of Implementation.
  • Distributor 30 is controlled by two control inputs 31 and 32, respectively between a supply position in which the air source at the clamping pressure PS is connected to the supply inlet 23, and a power cut position in which the air source at the clamping pressure PS is blocked.
  • the control input 31 of the distributor 30 is connected to a timer element 33 and control input 32 is connected to a timing element 34, both connected to the pressure source PS.
  • the organ 21 Before the start of a tightening cycle, the organ 21 is in the position illustrated in the figure 3, that is to say that the distributor 22 at rest provides a connection between the supply inlet 23 and the return 19 while the distributor 30 provides a connection between the source at pressure PS and the supply inlet 23.
  • a cam When passing from a first position of the spindle by relation to the frame a cam simultaneously triggers an action on the control input 24 of the distributor 22 and a setting timers 33 and 34 in operation.
  • distributor 22 causes a supply of the chamber 20 in fluid at the clamping pressure PS, which causes a rotation of the screw spindle.
  • the timer element 34 acts on the control input 32 of the distributor 30 to bring it to the power cut-off position.
  • the supply of the chamber 20 is then interrupted and the displacement of the piston 18 continues at a decreasing speed by the relaxation of the air contained in the chamber 20.
  • the element of timer 33 acts on control input 31 of the distributor 30 to return it to the position Power. Air at clamping pressure PS is then again introduced into chamber 20 so that the required tightening torque is applied to the plug.
  • T1 and T2 are determined so that a sufficient amount of air is introduced into chamber 20 so that the screw cap is almost total at expiration of time T2 and that the spindle then has a sufficient speed low so that the corresponding kinetic energy generates a torque when the stopper is brought into abutment dynamics lower than the torque generated by the pressure of Tightening.
  • the re-pressure of chamber 20 at the clamping pressure PS then causes clamping at speed slow so that when the rotation stops spindle the required tightening torque is reached but not exceeded.
  • the power input 23 of the distributor 22 is directly connected to a source of air at the clamping pressure PS.
  • An exhaust pipe 40 extends between a monostable distributor 41 and a outlet 43 of distributor 22 corresponding to the exhaust of chamber 19 when the distributor 22 is in the screwing position.
  • the distributor 41 is controlled by an input 44 between a rest position in which the pipe 40 is connected to an exhaust regulator 42, itself pressure controlled PS, and an exhaust position regulated in which line 40 is brought to free exhaust.
  • Distributor control input 44 41 is connected a position sensor 50 of the rack 16.
  • the position sensor 50 is arranged for correspond to the end of screwing the cap before tightening of it.
  • the distributor 22 When passing a first position of the spindle relative to the frame, the distributor 22 is brought in screwing position so that air at the pressure of PS clamping is introduced into chamber 20 while the exhaust from chamber 19 is subjected to the exhaust regulation 42.
  • the face of the piston 18 opposite of chamber 20 is therefore subjected to the clamping pressure PS while the opposite face of the piston 18 is subjected to back pressure resulting from exhaust restriction exercised by the regulatory body 42.
  • the difference between pressure and back pressure is set using of the regulating member 42 to avoid runaway the screw spindle.
  • command entries distributors have been described in relation to particular means of actuation, we can use any means of actuation appropriate to the installation in question in order to delimit a preliminary stage during which the piston 18 is subjected to a differential pressure reduced mean and a final stage where it is subject to the differential clamping pressure.
  • the clamping pressure PS is only applied only once during time T2
  • the clamping pressure, or a pressure of different constant value could be applied repeatedly during time T2 according to pulses of a duration appropriate to the type of packaging or the type of plug used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Retarders (AREA)
  • Sealing Of Jars (AREA)

Claims (8)

  1. Verfahren zur Steuerung einer Schraubspindel mit einem Motor, der mit einem Fluid gespeist wird und ein Motororgan (18) hat, das mit einer Spindelwelle (5) verbunden ist, um diese drehbar anzutreiben, umfassend den Schritt des Speisens der Schraubspindel unter Nenndruck- und -durchflußbedingungen, die ein benötigtes Spannmoment erzeugen, dadurch gekennzeichnet, daß das Verfahren einen vorausgehenden Schritt umfaßt, während dessen die Schraubspindel unter Bedingungen, die unter den Nennbedingungen liegen, in einem ausreichenden Maß gespeist wird, so daß sich die Spindelwelle mit einer Geschwindigkeit dreht, die zu einer kinetischen Energie führt, die ein gegenüber dem benötigten Spannmoment geringeres Moment erzeugt.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der Motor ein linearer Hubzylinder und das Motororgan ein Kolben ist, der während des vorausgehenden Schrittes einem mittleren Differentialdruck ausgesetzt ist, der geringer ist als ein Differential-Spanndruck.
  3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß eine Oberfläche des Kolbens während des vorausgehenden Schrittes in Schraubrichtung einem konstanten Druck ausgesetzt ist.
  4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß der konstante Druck geringer ist als der Differential-Spanndruck.
  5. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß der Kolben einem Gegendruck ausgesetzt ist.
  6. Verfahren nach Anspruch 5, dadurch gekennzeichnet, daß der konstante Druck gleich dem Differential-Spanndruck ist.
  7. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß der Kolben während des vorausgehenden Schrittes intermittierend einem Druck ausgesetzt ist.
  8. Verfahren nach Anspruch 7, dadurch gekennzeichnet, daß der Druck ein Differentialdruck ist, dessen Wert gleich dem Differential-Spanndruck ist.
EP98956938A 1997-11-17 1998-11-03 Regelungsverfahren für eine schraubspindel Expired - Lifetime EP1032536B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9714364 1997-11-17
FR9714364A FR2771040B1 (fr) 1997-11-17 1997-11-17 Procede de commande d'une broche de vissage
PCT/FR1998/002346 WO1999025638A1 (fr) 1997-11-17 1998-11-03 Procede de commande d'une broche de vissage

Publications (2)

Publication Number Publication Date
EP1032536A1 EP1032536A1 (de) 2000-09-06
EP1032536B1 true EP1032536B1 (de) 2002-01-30

Family

ID=9513429

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98956938A Expired - Lifetime EP1032536B1 (de) 1997-11-17 1998-11-03 Regelungsverfahren für eine schraubspindel

Country Status (11)

Country Link
US (1) US6263742B1 (de)
EP (1) EP1032536B1 (de)
JP (1) JP2001523626A (de)
CN (1) CN1105676C (de)
BR (1) BR9814206A (de)
DE (1) DE69803699T2 (de)
DK (1) DK1032536T3 (de)
ES (1) ES2171049T3 (de)
FR (1) FR2771040B1 (de)
PT (1) PT1032536E (de)
WO (1) WO1999025638A1 (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6385837B1 (en) 1999-04-05 2002-05-14 Central Motor Wheel Co., Ltd. Method and apparatus for fixedly connecting threaded tubes, and recording medium storing control program for practicing or controlling those method and apparatus
AU2003272309A1 (en) * 2002-09-09 2004-04-19 Sigmasix L.L.C. Control system for discontinuous power drive
US7448259B2 (en) * 2006-08-21 2008-11-11 Dresser-Rand Company Position feedback device for rotatable member
EP2537522A1 (de) 2007-08-02 2012-12-26 California Stem Cell, Inc. Neuronale Vorläuferzellen und Verfahren zur Ableitung und Reinigung neuronaler Vorläuferzellen aus embryonischen Stammzellen
US8602379B2 (en) * 2009-02-02 2013-12-10 Therin Laney Tie down for a vehicle assembly
CN101817492B (zh) * 2010-03-16 2011-12-07 广州达意隆包装机械股份有限公司 瓶盖封装方法
JP5461641B2 (ja) * 2012-09-03 2014-04-02 花王株式会社 ポンプキャップのキャップ締め装置
EP2826596A3 (de) * 2013-07-19 2015-07-22 Panasonic Intellectual Property Management Co., Ltd. Schlagdrehwerkzeug und Schlagdrehwerkzeugaufsatz
CN104308290B (zh) * 2014-10-13 2019-01-04 重庆金仑工业股份有限公司 加工多线螺纹的装置

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Publication number Priority date Publication date Assignee Title
US3593830A (en) * 1969-05-01 1971-07-20 Ingersoll Rand Co Automatic throttle torque-responsive power tool
US3866463A (en) * 1973-11-19 1975-02-18 Smithkline Corp Device for testing the torque required to release a screw cap from its tightened position
US3939920A (en) * 1974-09-19 1976-02-24 Standard Pressed Steel Co. Tightening method and system
US4026369A (en) * 1975-10-06 1977-05-31 Ingersoll-Rand Company Yield torque apparatus
CH637600A5 (en) * 1979-05-08 1983-08-15 Hais Jan Apparatus for mechanically sealing containers with a screw-on lid
JPS57121477A (en) * 1981-01-16 1982-07-28 Matsushita Electric Ind Co Ltd Fixed torque screw clamping device
JPS6144582A (ja) * 1984-08-07 1986-03-04 マツダ株式会社 ナツトランナ−における塑性締め良否判定方法
SE8901072L (sv) * 1989-03-28 1990-09-29 Atlas Copco Tools Ab Motordriven skruvdragare
US5167309A (en) * 1991-09-20 1992-12-01 Ingersoll-Rand Company Torque Control clutch
DE9312303U1 (de) * 1993-08-18 1994-12-15 Bosch Gmbh Robert Vorrichtung zum Anziehen von Schraubverbindungen
DE4429282A1 (de) * 1994-08-18 1996-02-22 Cooper Ind Inc Hydro-Impulsschrauber insbesondere zum Anziehen von Schraubverbindungen

Also Published As

Publication number Publication date
CN1105676C (zh) 2003-04-16
DK1032536T3 (da) 2002-05-13
JP2001523626A (ja) 2001-11-27
FR2771040A1 (fr) 1999-05-21
FR2771040B1 (fr) 2000-01-07
US6263742B1 (en) 2001-07-24
CN1278777A (zh) 2001-01-03
PT1032536E (pt) 2002-07-31
WO1999025638A1 (fr) 1999-05-27
DE69803699T2 (de) 2002-10-17
DE69803699D1 (de) 2002-03-14
ES2171049T3 (es) 2002-08-16
BR9814206A (pt) 2000-10-03
EP1032536A1 (de) 2000-09-06

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