WO2003011529A1 - Tête de bridage pour le maintien ou le serrage d'une piece - Google Patents
Tête de bridage pour le maintien ou le serrage d'une piece Download PDFInfo
- Publication number
- WO2003011529A1 WO2003011529A1 PCT/FR2002/002763 FR0202763W WO03011529A1 WO 2003011529 A1 WO2003011529 A1 WO 2003011529A1 FR 0202763 W FR0202763 W FR 0202763W WO 03011529 A1 WO03011529 A1 WO 03011529A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- clamping head
- clamping
- head according
- axis
- actuator
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING
- B25B5/00—Clamps
- B25B5/06—Arrangements for positively actuating jaws
Definitions
- Clamping head for holding or clamping a workpiece
- the invention relates to the field of clamping tools and it relates more particularly to a clamping head for holding or clamping parts.
- clamping heads are used in the industry to maintain or reference parts to be assembled. They find particular application in the assembly lines of structural elements or bodywork of motor vehicles. The parts thus clamped are then assembled by any known means, in particular by welding, gluing, clinching, etc.
- the clamping head is mounted either on a fixed assembly bench, or at the end of a robot arm, or even on a mobile pallet on an overhead conveyor or on the ground.
- clamping heads of this type essentially comprise a clamping member, often called a clamping clamp, which is integral with an axis of rotation, as well as an actuator capable of driving this axis of rotation to move the clamping member from one to the other from an open position and a closed position (or clamping position).
- the clamping member has an appropriate shape which comes close, in the closed position, to a fixed counterform to ensure the clamping of one or more parts between this shape and this counter form.
- the actuator is a double-acting pneumatic cylinder which controls the rotation of the clamping member by means of a connecting rod.
- the clamping head In addition, in the event of failure of the compressed air network or the pneumatic cylinder, the clamping head cannot be kept in a safety position.
- pneumatic cylinders require frequent maintenance and, in the event of failure, they are difficult to remove from the clamping head. It then becomes necessary to disassemble the entire clamping head to exchange it for a head in working condition. Such an operation requires a long downtime, which disturbs the high rates imposed by modern assembly lines.
- the object of the invention is in particular to overcome the aforementioned drawbacks.
- the invention also aims to provide such a clamping head which can be easily repaired or replaced, in whole or in part, in the event of failure.
- the actuator is a rotary actuator coupled to a motor axis which extends orthogonally to the axis of rotation and which carries an endless screw of irreversible type meshing with a toothed wheel secured to the axis of rotation, control means being provided for controlling the actuator according to a chosen law.
- the clamping head of the invention clearly differs from known clamping heads by the use of a rotary actuator instead of a translational actuator, such as a pneumatic cylinder.
- the rotary actuator controls the rotation movement of the clamping member by means of a transmission comprising an endless screw of irreversible type and a toothed wheel integral in rotation with the clamping member.
- This characteristic is particularly advantageous when the clamping member is in the closed position, ensuring the clamping or clamping of the part.
- this worm gear and toothed wheel transmission ensures immediate locking in any position, and in particular in the closed or tightening position.
- the worm has a reduction ratio of between 1/20 and 1/35.
- a torque limiter is interposed between the toothed wheel and the axis of rotation, thereby enabling the clamping member to be released in the event of sudden impact.
- the motor axis it is also advantageous for the motor axis to carry an inertia wheel arranged in the form of a wheel to allow manual unlocking of the clamping member.
- This inertia wheel thus plays a double function: on the one hand, it stores energy and transmits it to the transmission worm / toothed wheel; on the other hand, it allows manual unlocking of the clamping member, without requiring special tools.
- the clamping head comprises a mechanical stage carrying the clamping bracket, the axis of rotation and the motor axis; a power stage carrying X 'actuator; - removable fixing means interposed between the mechanical stage and the power stage; and a removable coupling between the actuator and the motor shaft.
- the clamping head is formed of two distinct sub-assemblies or stages, one mechanical and the other of power, which can be assembled and disassembled easily, which allows the interchangeability of one or the other. of the two stages in the event of failure.
- the mechanical stage advantageously comprises a housing integrating a chosen configuration fixing interface.
- This fixing interface also called fixing face
- the housing of the mechanical stage is advantageously formed of two assembled half-shells, for example by gluing, and trapping the fixing interface.
- the power stage also includes a housing housing the actuator.
- the removable coupling interposed between the two aforementioned stages preferably comprises an elastic connection.
- this coupling comprises an elastic washer of selected shape coupled in rotation to the actuator and received in a housing of conjugate shape defined in a cup coupled to the motor axis.
- the actuator is advantageously an electric motor, in particular a brushless motor, which is controlled by the control means.
- control means advantageously include an electronic card capable of controlling the motor by means of a pilot.
- This electronic card can be integrated in the clamping head (on-board card) or be external to the clamping head (remote card) by being connected to the clamping head by an electrical connection.
- the electronic card makes it possible to configure the clamping head according to each particular case.
- It may include in particular means for setting the clamping force exerted by the clamping member, means for setting the opening angle of the clamping member between its open position and its closed position , or further means for configuring a law of movement of the clamping member.
- FIG. 1 is a perspective view of a clamping head according to the invention, the clamping member is shown in the open position;
- FIG. 2 is a side view of the clamping head of the
- FIG. 3 is a front view of the clamping head of
- Figures 1 and 2 the clamping member is shown in two different positions;
- - Figure 4 is a sectional view, on an enlarged scale, along the line IV-IV of Figure 2;
- FIG. 5 is a sectional view, on an enlarged scale, along the line V-V of Figure 4;
- FIG. 7 is a sectional view along line VII-VII of Figure 4.
- FIG. 8 is a sectional view along line VIII-VIII of Figure 4; - Figure 9 schematically shows control means of the clamping head of the invention.
- FIG. 10 shows a curve showing the angular speed variations of the clamping member when it passes from the open position to the closed position.
- FIG. 1 shows a clamping head 10 according to the invention, which comprises a mechanical stage 12 and a power stage 14 (here an electric stage), these two stages being assembled together so removable.
- the mechanical stage 12 is produced in the form of a housing formed of two generally symmetrical half-shells 16 and assembled together, for example by gluing.
- These two half-shells 16 have two opposite flat faces 18 which extend parallel to each other and which are each crossed by an axis of rotation 20, one end 22 of which has a square conformation and the other end 23 of which is cylindrical (see also Figure 4).
- a clamping member 24 produced in the form of a stirrup which comprises two symmetrical wings 26 joined by a core 28 ( Figures 1, 2 and 4). The two wings 26 are fixed to the ends 22 and 23 of the axis 20, each time by means of a flange 30 and two screws 32.
- the clamping member 24 is adapted to pivot, integrally with the axis 20, from one to the other of two positions comprising an open position (shown in broken lines in Figure ) and a closed or tightened position (shown in solid lines in the Figure).
- the opening angle defined between the two aforementioned positions is usually 105 '.
- the clamping member 24 carries a shape 34 suitable for the chosen use and suitable for coming to cooperate with a counterform 36, which is fixed, to hold between them a piece 38 which is intended to be clamped, that is that is to say held or clamped in a determined position.
- this part can be a component part of a motor vehicle. Stops 35 and 37 can be provided to control the approximation of form 34 and counterform 36 in the closed position.
- Each of the faces 18 of the half-shells 16 is extended by a flange 40 at a right angle which is fixed by means of two screws 42 on one end of the power stage 14 ( Figure 1).
- the latter has the form of a box 44 of generally parallelepiped shape having two main faces 46 opposite, two opposite lateral faces 48 and a lower face 50. The latter is crossed by an electric cable 52 terminated by a connection plug 54.
- the faces 18 of the two half-shells 16 are extended at right angles by edges 56 ( Figures 1 and 2) which are intended to be assembled together, at an assembly plane, by any suitable means.
- the two half-shells 16 are made of composite material, advantageously of a polyamide loaded with glass fibers and they are joined by gluing.
- the two half-shells 16 are intended to contain the mechanical part of the clamping head of the invention. In the event that these two half-shells are assembled definitively, this provides a non-removable mechanical stage which is greased for life and which, in the event of failure, must be replaced outright.
- this interface has a configuration suitable for its use. In practice, it is the end user of the clamping head which defines the configuration of this fixing interface.
- this interface has the shape of a generally flat core having a polygonal contour with a central opening 60. It in particular has a tab 62 provided with two openings 64 and 66 crossed respectively by two pins 68 and 70 from the 'one of the two half-shells ( Figure 4).
- the interface 58 is trapped and kept in a fixed position. It is advantageously also glued between the two half-shells.
- a motor shaft 72 is mounted which can be made in one piece by machining. This motor axis is able to rotate along a direction axis XX, orthogonally to the axis of rotation 20 carrying the clamping member 24.
- the motor shaft 72 has one end 74 held by bearings 76, a lower end 78 arranged to form a cup and an intermediate part 80, of cylindrical shape, held by bearings 82 of the needle type.
- an endless screw 84 is formed which meshes with a toothed wheel 86 (in the form of a toothed sector) integral in rotation with the axis 20 and therefore with the clamping member 24.
- the worm 84 is of irreversible type. It has a reduction ratio advantageously between 1/20 and 1/35. As an example, this reduction ratio can be 1/28. Thus, when the motor axis 72 is driven in rotation, the toothed wheel 86 is also driven in rotation about its _axis, with the reduction ratio imposed by the screw. But, because of the reduction ratio chosen, the transmission of a movement, in the opposite direction, is strictly impossible.
- a torque limiter 88 ( Figure 5) is interposed between the toothed wheel 86 and the axis of rotation 20.
- the toothed wheel 86 has two opposite annular faces 90 against which are biased balls 92 carried by a ring 94 against which acts a series of Belleville washers 96.
- Each of the assemblies is carried by a part 98 forming a bowl which is wedged on the axis 20 and which can rotate by means of bearings 100.
- the Belleville washers are calibrated, so that the balls are loaded axially, with a force of selected value, against the respective faces 90 of the toothed wheel 86. These faces are provided with suitable imprints arranged at selected angular intervals, for example every 90 " .
- the torque limiter 88 makes it possible to decouple the toothed wheel from the axle 20, the balls 92 passing each time from the imprints they previously occupied to other imprints formed in the faces 90
- the torque limiter is possible to decouple the toothed wheel from the axle 20, the balls 92 passing each time from the imprints they previously occupied to other imprints formed in the faces 90
- a cylindrical part 102 is formed which forms a flywheel and which also forms a knurl 104 which projects through two windows 105 which the faces respectively have 18 of stage 12 ( Figures 1, 3 and 4). And / -this together- ensures both a wheel inertia function for storing the rotational energy transmitted by the power stage 14 and a manual release function.
- the wheel 104 has at its periphery a series of blind holes 106, directed radially, allowing the introduction of an appropriate tool, of the spindle type, to facilitate rotation of the wheel in case violent blocking.
- the housing 44 of the power stage 14 has an open face 108 capable of being adapted and fixed in a leaktight and removable manner to the housing of the mechanical stage 12, of as previously indicated.
- the housing 44 is advantageously made of a material of the same type as the housing of the mechanical stage, for example of polyamide loaded with glass fibers.
- the housing 44 internally houses a rotary actuator 110 constituted, in the example, by an electric motor having an output axis 112 arranged coaxially with the motor axis 72 ( Figure 4).
- the motor is advantageously a "brushless" type motor supplied with direct current and low voltage, typically at 24 volts.
- This motor is controlled, according to a chosen law, by means of control 114 which will be described later.
- these control means are housed in the housing 44, being supplied from the cord 52. However, as a variant, they could be located, in whole or in part, outside this housing.
- a removable coupling, of the elastic connection type, is provided between the output axis 112 of the motor and the motor axis 72.
- a ring 116 of split type is fixed on the outlet axis 112 by means of a screw 118.
- An elastic washer 120 of chosen contour is threaded on the axis 112 so as to come to rest on an annular face 122 of the ring
- a support washer 124 is then threaded on the axis 112 and secured to the ring 116 by means of three screws 126 ( Figures
- the elastic washer 120 has a specific configuration, not circular. In the example, it comprises four peripheral lobes 128, offset 90 'from each other and each having substantially a semi-circular shape.
- the cup 78 defines a housing 130 of conjugate shape ( Figure 7) intended to receive the elastic washer 120.
- This provides a quick coupling, of an elastic nature, which automatically ensures a rotational connection between the mechanical stage 12 and the power stage 14 when they are mutually assembled.
- the elastic washer 120 is formed from a material of the semi-rigid elastic type. As such, it is advantageous to use a material chosen from polyamides and, in particular, the material known under the name Ertalon (registered trademark).
- the interchangeability of one or other of the stages of the clamping head is greatly facilitated.
- the two stages are planned for a lifetime operation and, in the event of failure of one of them, it is enough simply to dismount it to throw it and replace it by a new stage. This minimizes downtime during replacement operations.
- control means 114 are produced in the form of an electronic card, that is to say an electronic circuit. In the embodiment shown, this card is intended to be inserted in the housing 44, as described above.
- the card 114 includes a regulation 132 which controls the motor 110 through a pilot 134.
- This regulation is supplied electrically through a connector 136 having two terminals capable of being connected respectively to the positive pole (+ V) and to the negative pole (-V) of a direct current source at low voltage. Wires 138 also supply the pilot.
- the regulation 132 may include different means of configuration. In the example, it includes MPI setting means for setting the clamping force exerted by the clamping member, MP2 setting means for setting the opening angle of the clamping member between its position d opening and its closed position, and MP3 setting means for setting a law of movement of the clamping member.
- Figure 10 shows an example of such a motion law; it illustrates the variation of the angular speed (V) of the clamping member as a function of time (T).
- the movement is broken down into three phases: an acceleration phase A, a level P at constant speed and a deceleration phase D.
- the entire movement, from the open position to the closed position (or vice versa), must be done in a very short time interval, typically less than or equal to 0.5 seconds.
- the MPI setting means can, for example, set the clamping force to a value between 40 and 200 daN, and the -MP2 means allow setting, for example, the opening angle from 0 to 105 '.
- clamping head of the invention is susceptible of numerous variant embodiments.
- control means could also be located outside the clamping head, that is to say remote.
- this card can also manage several clamping heads independently or simultaneously, preferably through a communication device of the "bus" type.
- the realization of the elastic coupling is susceptible of numerous variants, as long as it allows a quick connection between the mechanical stage and the power stage of the clamping head of the invention.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Plates (AREA)
- Manipulator (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP02779599A EP1412134A1 (fr) | 2001-07-31 | 2002-07-31 | T te de bridage pour le maintien ou le serrage d'une piece |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR01/10259 | 2001-07-31 | ||
| FR0110259A FR2828123B1 (fr) | 2001-07-31 | 2001-07-31 | Tete de bridage pour le maintien ou le serrage d'une piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2003011529A1 true WO2003011529A1 (fr) | 2003-02-13 |
Family
ID=8866133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2002/002763 Ceased WO2003011529A1 (fr) | 2001-07-31 | 2002-07-31 | Tête de bridage pour le maintien ou le serrage d'une piece |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1412134A1 (fr) |
| FR (1) | FR2828123B1 (fr) |
| WO (1) | WO2003011529A1 (fr) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014010391A1 (fr) * | 2012-07-13 | 2014-01-16 | Smc Kabushiki Kaisha | Appareil de serrage électrique |
| TWI511825B (zh) * | 2012-01-27 | 2015-12-11 | Smc Kk | 電動夾鉗裝置 |
| CN113210981A (zh) * | 2021-05-27 | 2021-08-06 | 重庆科技学院 | 一种用于锡球表面的电磁脉冲焊限位设备 |
| DE102014113381B4 (de) | 2013-09-20 | 2023-03-16 | GM Global Technology Operations, LLC (n.d. Ges. d. Staates Delaware) | Werkzeuganordnung |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4737456B2 (ja) * | 2007-11-22 | 2011-08-03 | Smc株式会社 | グリッパ機構 |
| DE102008053530A1 (de) * | 2008-10-28 | 2010-04-29 | De-Sta-Co Europe Gmbh | Spannvorrichtung |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4500081A (en) * | 1983-01-05 | 1985-02-19 | Carossino Freres | Clamp apparatus, especially for clamping a part onto a machine tool |
| US4635911A (en) * | 1985-08-30 | 1987-01-13 | Lovrenich Rodger T | Motorized over center clamp |
| US4700936A (en) * | 1986-08-26 | 1987-10-20 | Lamb Technicon Corp. | Clamp mechanism |
| US5516087A (en) * | 1993-08-19 | 1996-05-14 | Bessey & Sohn Gmbh & Co. | Clamping device |
| FR2776858A1 (fr) * | 1998-03-27 | 1999-10-01 | Genus Technologies | Dispositif de maintien, de positionnement, ou de serrage, a actionnement electrique |
| DE19931723C1 (de) * | 1999-07-08 | 2000-09-21 | Tuenkers Maschinenbau Gmbh | Kraftangetriebene Kniehebelspannvorrichtung zur Verwendung im Karosseriebau der Kfz-Industrie |
-
2001
- 2001-07-31 FR FR0110259A patent/FR2828123B1/fr not_active Expired - Fee Related
-
2002
- 2002-07-31 EP EP02779599A patent/EP1412134A1/fr not_active Withdrawn
- 2002-07-31 WO PCT/FR2002/002763 patent/WO2003011529A1/fr not_active Ceased
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4500081A (en) * | 1983-01-05 | 1985-02-19 | Carossino Freres | Clamp apparatus, especially for clamping a part onto a machine tool |
| US4635911A (en) * | 1985-08-30 | 1987-01-13 | Lovrenich Rodger T | Motorized over center clamp |
| US4700936A (en) * | 1986-08-26 | 1987-10-20 | Lamb Technicon Corp. | Clamp mechanism |
| US5516087A (en) * | 1993-08-19 | 1996-05-14 | Bessey & Sohn Gmbh & Co. | Clamping device |
| FR2776858A1 (fr) * | 1998-03-27 | 1999-10-01 | Genus Technologies | Dispositif de maintien, de positionnement, ou de serrage, a actionnement electrique |
| DE19931723C1 (de) * | 1999-07-08 | 2000-09-21 | Tuenkers Maschinenbau Gmbh | Kraftangetriebene Kniehebelspannvorrichtung zur Verwendung im Karosseriebau der Kfz-Industrie |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI511825B (zh) * | 2012-01-27 | 2015-12-11 | Smc Kk | 電動夾鉗裝置 |
| DE112012005764B4 (de) | 2012-01-27 | 2021-09-23 | Smc Kabushiki Kaisha | Elektrische Spannvorrichtung |
| WO2014010391A1 (fr) * | 2012-07-13 | 2014-01-16 | Smc Kabushiki Kaisha | Appareil de serrage électrique |
| JP2014018882A (ja) * | 2012-07-13 | 2014-02-03 | Smc Corp | 電動クランプ装置 |
| CN104411460A (zh) * | 2012-07-13 | 2015-03-11 | Smc株式会社 | 电动夹紧设备 |
| US9550262B2 (en) | 2012-07-13 | 2017-01-24 | Smc Kabushiki Kaisha | Electric clamp apparatus |
| RU2608934C2 (ru) * | 2012-07-13 | 2017-01-26 | СМСи КАБУСИКИ КАИСА | Электрическое зажимное устройство |
| RU2608934C9 (ru) * | 2012-07-13 | 2017-06-22 | СМСи КАБУСИКИ КАИСА | Электрическое зажимное устройство |
| DE102014113381B4 (de) | 2013-09-20 | 2023-03-16 | GM Global Technology Operations, LLC (n.d. Ges. d. Staates Delaware) | Werkzeuganordnung |
| CN113210981A (zh) * | 2021-05-27 | 2021-08-06 | 重庆科技学院 | 一种用于锡球表面的电磁脉冲焊限位设备 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1412134A1 (fr) | 2004-04-28 |
| FR2828123A1 (fr) | 2003-02-07 |
| FR2828123B1 (fr) | 2003-12-12 |
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