WO1999025638A1 - Procede de commande d'une broche de vissage - Google Patents
Procede de commande d'une broche de vissage Download PDFInfo
- Publication number
- WO1999025638A1 WO1999025638A1 PCT/FR1998/002346 FR9802346W WO9925638A1 WO 1999025638 A1 WO1999025638 A1 WO 1999025638A1 FR 9802346 W FR9802346 W FR 9802346W WO 9925638 A1 WO9925638 A1 WO 9925638A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pressure
- spindle
- piston
- screwing
- torque
- Prior art date
Links
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 for controlling a screwing spindle such as those used for the fitting by screwing of plugs on packages having threaded necks.
- Screwing pins are known which comprise a linear cylinder having a piston connected to a pin shaft to drive the latter in rotation.
- a commonly used method for controlling such pins consists in subjecting the piston to a differential tightening pressure generating the required tightening torque of the plug on the neck of the package.
- a problem comes from the fact that at the beginning of the screwing of the stopper, there is little friction between the stopper and the neck, so that a weak resistive torque opposes the rotation of the spindle.
- the spindle shaft then acquires a high rotational speed and, due to the inertia the spindle shaft stores significant kinetic energy.
- the kinetic energy thus stored causes a rapid screwing of the plug until the latter comes to a stop, which causes the spindle shaft to stop suddenly.
- the kinetic energy stored is restored by application to the plug in the form of a dynamic torque, greater than the required tightening torque.
- This dynamic torque may cause deterioration of the cap or neck of the packaging, or force a user of the packaging to use a tool to loosen the cap.
- An object of the invention is to propose a method for controlling the screwing spindle enabling the required tightening torque to be obtained precisely.
- a method of controlling a screw spindle comprising a step of supplying the screw spindle with fluid under nominal conditions of pressure and flow generating required torque and previous step during which the screw spindle is supplied under conditions below the nominal conditions in a sufficient proportion so that the spindle shaft has a rotational speed generating kinetic energy producing a torque less than the required tightening torque.
- the piston is subjected during the previous step to an average differential pressure lower than a differential clamping pressure.
- the average differential pressure ensures the rotation of the spindle shaft at a low speed resulting in a small accumulation of kinetic energy.
- the resistive torque opposing the screwing is then sufficient to prevent the spindle rotation speed increasing so that the plug stops as soon as the resistive torque is equal to the engine torque corresponding to the clamping pressure. There is therefore no sudden release of kinetic energy so that the effective tightening torque applied to the plug is equal to the required tightening torque.
- 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 a constant pressure in a screwing direction, and to 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 the back pressure.
- the constant pressure is equal to the clamping pressure. Only one pressure level, corresponding to the required tightening torque, is then necessary.
- the regulation of the pressure of the cylinder supply fluid 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 speed of the spindle by acting on the setting times pressure and the pressure cut-off times.
- the differential pressure has a constant value equal to the clamping pressure.
- FIG. 1 is a partial perspective view of a screw spindle
- FIGS. 2, 3 and 4 are schematic representations of the spindle control member corresponding to three embodiments of the method according to one invention.
- the screw pin controlled by the method of the invention has a structure and an operation known per se and some of its elements have not been shown.
- the screw pin controlled by the method of the invention has a structure and an operation known per se and some of its elements have not been shown.
- it comprises a vertical guide tube 1 fixed to a spindle support 2 and sliding vertically in a sleeve 3 secured to a rotary platform 4.
- the tube 1 rotatably receives a spindle shaft 5 the lower end of which protrudes from the tube 1 and carries a jaw gripping device 6.
- the upper end of the spindle shaft 5 carries a bevel gear 7 cooperating with a motor assembly generally designated at 11.
- the spindle support 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 fixed frame to position the support 2 and the parts attached to it in height. associated.
- a support plate 10 is fixed to 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 carrying, by means of a free wheel 45, a bevel gear 14 whose teeth are in contact with those of the pinion 7, and an opposite end carrying an input pinion 15 whose teeth are at contact with those of a rack 16.
- the 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
- 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 exhaust while the chamber 20 is connected to a supply inlet 23 and a return position in which the chamber 19 of the jack 17 is placed in communication with the supply inlet 23 of the distributor 22 while the chamber 20 is exhausted.
- the control input 24 is connected to a first sensor (not shown) for the position of the screw spindle relative to the fixed frame.
- a monostable distributor 25 is disposed between the supply inlet 23 and two sources of pressurized air, an air source at the tightening pressure PS corresponding to a required tightening torque and an air source at a pressure P lower than the pressure PS.
- the distributor 25 is controlled by a control input 26 between a low pressure supply position in which the pressure source P is connected to the supply input 23 while the pressure source PS is closed, and a position d supply at the clamping pressure in which the pressure source P is closed while the pressure source PS is connected to the supply input 23.
- the control input 26 is connected to a second position sensor of the screw spindle relative to the fixed frame.
- the platform 4 is rotated relative to the fixed frame by a motor.
- Packages with threaded necks are brought successively and are held vertically above the jaw gripping device 6 previously provided with a plug.
- the distributor 22 is brought by the control input 24 to the screwing position while the distributor 25 remains in the low pressure supply position.
- 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 rotates the input pinion 15 which transmits its opening to the gripping device 6 via the shaft 12, the pinions 14 and 7, and the spindle shaft 5 pivoting in the guide tube 1.
- the pressure P is lower than the tightening pressure PS in a sufficient proportion so that the spindle shaft 5 has a rotational speed generating kinetic energy producing a torque lower than the required tightening torque.
- the distributor 25 When passing from a second position of the spindle relative to the frame corresponding for example to an end of screwing the cap, that is to say that the bottom of the cap is in abutment on the neck of the bottle, the distributor 25 is brought by control input 26 to the supply position at the clamping pressure. Air at the clamping pressure PS is then introduced into the chamber 20.
- the second position determining the start of the supply of the chamber 20 with air at the clamping pressure PS is defined for that the resistive torque opposing then the screwing of the plug 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 generating kinetic energy sufficient to produce a torque greater than the required tightening torque.
- the tightening of the cap on the neck causes a resisting torque having a value equal to that of the motor torque, the spindle shaft 5 stops rotating and the rack 16 stops.
- the distributor 25 is returned to the low pressure supply position, and the distributor 22 is returned to the return position. Air at pressure P is then introduced into the chamber 19 of the jack 17 so that the jack is retracted.
- the freewheel 45 associated with the pinion 14 allows retraction of the jack without unscrewing the plug.
- the jaws of the gripping device 6 can be opened without damage to the plug and the screw spindle is then ready for a new cycle.
- the control member 21 comprises a bistable distributor 30 disposed between an air source at the clamping pressure PS and the supply inlet 23 of a distributor 22 identical to that of the first embodiment.
- the 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 input 23, and a cut-off position supply in which the air source at the clamping pressure PS is closed.
- the control input 31 of the distributor 30 is connected to a timing element 33 and the control input 32 is connected to a timing element 34, both of which are connected to the pressure source PS.
- the control member 21 Before the start of a tightening cycle, the control member 21 is in the position illustrated in FIG. 3, that is to say that the distributor 22 at rest ensures a connection between the supply inlet 23 and the return chamber 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 relative to the frame, a cam simultaneously triggers an action on the control input 24 of the distributor 22 and a commissioning of the timers 33 and 34.
- the control of the distributor 22 causes the chamber 20 to be supplied with fluid at the clamping pressure PS , which causes the screwing spindle to rotate.
- the timer element 34 acts on the control input 32 of the distributor 30 to bring the latter into the power cut position.
- the supply to the chamber 20 is then interrupted and the displacement of the piston 18 continues at a decreasing speed by the expansion of the air contained in the chamber 20.
- the time delay element 33 acts on the control input 31 of the distributor 30 to return the latter to the supply position . Air at the clamping pressure PS is then again introduced into the chamber 20 so that the required tightening torque is applied to the plug.
- T1 and T2 are determined so that a sufficient quantity of air is introduced into the chamber 20 so that the screwing of the plug is practically total at the expiration of the time T2 and the spindle then has a sufficiently low speed so that the corresponding kinetic energy generates a dynamic torque lower than the torque generated by the tightening pressure when the stopper is brought to a stop.
- the re-pressure of chamber 20 at the tightening pressure PS then causes tightening at low speed so that when the spindle rotation stops the required tightening torque is reached but not exceeded.
- the distributor 22 When the spindle reaches an end of cycle position, the distributor 22 is put to rest and the clamping pressure PS is sent to the chamber 19 of the jack to cause the latter to retract. The jaws of the gripping device 6 are open and the spindle is ready for a new cycle.
- the supply inlet 23 of the distributor 22 is directly connected to an air source at the clamping pressure PS.
- An exhaust pipe 40 extends between a monostable distributor 41 and an outlet 43 of the distributor 22 corresponding to the exhaust from the chamber 19 when the distributor 22 is in the screwing position.
- the distributor 41 is controlled by an inlet 44 between a rest position in which the pipe 40 is connected to an exhaust regulating member 42, itself controlled by the pressure PS, and a regulated exhaust position in which the line 40 is put to free exhaust.
- the control input 44 of the distributor 41 is connected to a position sensor 50 of the rack 16.
- the position sensor 50 is arranged to correspond to the end of the screwing of the plug before it is tightened.
- the distributor 22 When passing from a first position of the spindle relative to the frame, the distributor 22 is brought into the screwing position so that air at the clamping pressure PS is introduced into the chamber 20 while the exhaust from the chamber 19 is subjected to the exhaust regulating member 42.
- the face of the piston 18 facing chamber 20 is therefore subjected to the clamping pressure PS while the opposite face of the piston 18 is subjected to a back pressure resulting from the restriction of escapement exerted by the regulating member 42.
- the difference between the pressure and the back pressure is adjusted by means of l 'regulator 42 to avoid runaway of the screw spindle.
- any actuation means suitable for the installation in question may be used in order to delimit a prior step during which the piston 18 is subjected to a reduced average differential pressure and a final step where it is subjected to the clamping differential pressure.
- the clamping pressure PS is applied only once during time T2
- the clamping pressure, or a pressure of different constant value could be applied repeatedly during the time T2 according to pulses of duration appropriate to the type of packaging or to the type of cap used.
- the invention has been described in relation to a spindle driven in rotation by a linear cylinder, which makes it possible to obtain a tightening torque which is directly proportional to the supply pressure, it is can also implement the method according to the inven ⁇ tion in relation to a powered fluid motor having a motor element connected to the spindle shaft via a torque limiter device, for example a rotary motor equipped a friction clutch.
- a torque limiter device for example a rotary motor equipped a friction clutch.
- the method according to the invention makes it possible to avoid overshooting of the tightening torque due to the triggering inertia of the torque limiting device in relation to the kinetic energy stored by the motor.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
- Sealing Of Jars (AREA)
- Retarders (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE69803699T DE69803699T2 (de) | 1997-11-17 | 1998-11-03 | Regelungsverfahren für eine schraubspindel |
BR9814206-2A BR9814206A (pt) | 1997-11-17 | 1998-11-03 | Processo de comando de um fuso de atarraxamento. |
JP2000521032A JP2001523626A (ja) | 1997-11-17 | 1998-11-03 | スクリュスピンドルを制御する方法 |
DK98956938T DK1032536T3 (da) | 1997-11-17 | 1998-11-03 | Fremgangsmåde til styring af en skruespindel |
EP98956938A EP1032536B1 (fr) | 1997-11-17 | 1998-11-03 | Procede de commande d'une broche de vissage |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR97/14364 | 1997-11-17 | ||
FR9714364A FR2771040B1 (fr) | 1997-11-17 | 1997-11-17 | Procede de commande d'une broche de vissage |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999025638A1 true WO1999025638A1 (fr) | 1999-05-27 |
Family
ID=9513429
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1998/002346 WO1999025638A1 (fr) | 1997-11-17 | 1998-11-03 | Procede de commande d'une broche de vissage |
Country Status (11)
Country | Link |
---|---|
US (1) | US6263742B1 (fr) |
EP (1) | EP1032536B1 (fr) |
JP (1) | JP2001523626A (fr) |
CN (1) | CN1105676C (fr) |
BR (1) | BR9814206A (fr) |
DE (1) | DE69803699T2 (fr) |
DK (1) | DK1032536T3 (fr) |
ES (1) | ES2171049T3 (fr) |
FR (1) | FR2771040B1 (fr) |
PT (1) | PT1032536E (fr) |
WO (1) | WO1999025638A1 (fr) |
Families Citing this family (9)
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 |
WO2004029466A2 (fr) * | 2002-09-09 | 2004-04-08 | Sigmasix L.L.C. | Systeme de commande destine a une commande mecanique discontinue |
US7448259B2 (en) * | 2006-08-21 | 2008-11-11 | Dresser-Rand Company | Position feedback device for rotatable member |
EP2185694A2 (fr) | 2007-08-02 | 2010-05-19 | California Stem Cell, Inc. | Cellules progénitrices neuronales et procédés de dérivation et de purification de cellules progénitrices neuronales de cellules souches embryonnaires |
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 (fr) * | 2013-07-19 | 2015-07-22 | Panasonic Intellectual Property Management Co., Ltd. | Outil de rotation d'impact et fixation d'outil de rotation d'impact |
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 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
CH637600A5 (en) * | 1979-05-08 | 1983-08-15 | Hais Jan | Apparatus for mechanically sealing containers with a screw-on lid |
Family Cites Families (9)
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 |
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 |
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 | Robert Bosch Gmbh, 70469 Stuttgart | Vorrichtung zum Anziehen von Schraubverbindungen |
DE4429282A1 (de) * | 1994-08-18 | 1996-02-22 | Cooper Ind Inc | Hydro-Impulsschrauber insbesondere zum Anziehen von Schraubverbindungen |
-
1997
- 1997-11-17 FR FR9714364A patent/FR2771040B1/fr not_active Expired - Fee Related
-
1998
- 1998-11-03 JP JP2000521032A patent/JP2001523626A/ja active Pending
- 1998-11-03 WO PCT/FR1998/002346 patent/WO1999025638A1/fr active IP Right Grant
- 1998-11-03 EP EP98956938A patent/EP1032536B1/fr not_active Expired - Lifetime
- 1998-11-03 ES ES98956938T patent/ES2171049T3/es not_active Expired - Lifetime
- 1998-11-03 BR BR9814206-2A patent/BR9814206A/pt active Search and Examination
- 1998-11-03 DE DE69803699T patent/DE69803699T2/de not_active Expired - Fee Related
- 1998-11-03 CN CN98811168A patent/CN1105676C/zh not_active Expired - Fee Related
- 1998-11-03 PT PT98956938T patent/PT1032536E/pt unknown
- 1998-11-03 DK DK98956938T patent/DK1032536T3/da active
- 1998-11-16 US US09/192,428 patent/US6263742B1/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
CH637600A5 (en) * | 1979-05-08 | 1983-08-15 | Hais Jan | Apparatus for mechanically sealing containers with a screw-on lid |
Also Published As
Publication number | Publication date |
---|---|
DK1032536T3 (da) | 2002-05-13 |
EP1032536B1 (fr) | 2002-01-30 |
FR2771040B1 (fr) | 2000-01-07 |
JP2001523626A (ja) | 2001-11-27 |
CN1278777A (zh) | 2001-01-03 |
PT1032536E (pt) | 2002-07-31 |
DE69803699D1 (de) | 2002-03-14 |
ES2171049T3 (es) | 2002-08-16 |
CN1105676C (zh) | 2003-04-16 |
DE69803699T2 (de) | 2002-10-17 |
EP1032536A1 (fr) | 2000-09-06 |
BR9814206A (pt) | 2000-10-03 |
FR2771040A1 (fr) | 1999-05-21 |
US6263742B1 (en) | 2001-07-24 |
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