DE102008028238B4 - Clamping device with magazine arrangement - Google Patents

Abstract

Clamping device (3), in particular for use in the bodywork of the motor vehicle industry, with a pivotable about a defined pivoting angle clamping arm (10) which cooperates with an abutment (13) with the interposition of an exciting component / workpiece, wherein the clamping arm (10) and / or the abutment (13) is associated with at least one contour piece, which cooperates with a surface to be clamped the component / workpiece, wherein a plurality of juxtaposed and / or successively arranged rod or needle-shaped Einzelklemmkörper with mutually facing surfaces to each other parallel and against each other liftable against the restoring force of at least one, for example compression spring element are guided and in the respective desired stroke position of each individual clamping body locked together, but also jointly formed releasable (contour needle pad 12), characterized in that in a magazine (1) negative contour body (7) for different Ba Parts / workpieces are arranged, which set the Kontadeladelkissen (12) after loosening the locking of the individual clamping body by placing the Konturnadelkissens (12) on the negative contour body (7) and moving the single clamping body to the new contour, whereupon the individual clamping body in each occupied contour. ..

Description

The The invention relates to a tensioning device, in particular for use in the bodywork of the automotive industry, with a defined tilt angle pivoting clamping arm, with an abutment with interposition a too exciting component / workpiece cooperates, the Clamping arm and / or the counter bearing assigned at least one contour piece is that cooperates with a surface to be clamped the component / workpiece, wherein a plurality of juxtaposed and / or successively arranged rod-shaped or needle-shaped Einzelklemmkörper with facing each other parallel to each other and against each other liftable against the restoring force at least one, for example, compression spring element are guided and in the respective desired stroke position every single single clamping body can be locked together, but also designed to be detachable together (contour pincushion).

State of the art

Such a device is known from WO 2005/051602 A1 or from the published documents of the German utility model DE 20 2004 002 982 U1 previously known.

It are also clamping tools previously known, which usually at least have a jaw, with which they are against the exciting workpiece act. Toggle clamps are preferred in car body construction used. Such toggle tensioners are usually made a chuck, the motor drive, z. B. a piston-cylinder unit with alternately on both sides by pressure medium pressure, in particular is assigned by air pressure to be acted upon piston. Of the Piston is connected to a piston rod, which is based on a toggle joint arrangement interacts, over a clamping arm up and down and against the workpiece to be clamped, z. B. Sheets in body construction, can be pressed is. As abutments often serve so-called pine or other Device parts on which the workpieces, z. As sheets, rest and then under high pressure from the tensioner arm and attached thereto Clamping jaws are pressed and locked until they z. B. by Spot welding, Clinching, gluing or the like permanently connected are. Since especially in the body shop to brace the Workpieces, z. B. wheel arches, Sills, or other parts made of sheet metal body, have different contours, such contours must be the outer exciting surfaces be adapted, which is costly, since such contour pieces often milled from solid through CNC-controlled machines or otherwise, as must be made. For different Contours must also different contour pieces be held with the jaws or clamping levers be connected interchangeably. Also, the establishment of such contour pieces, the is called The exact adaptation to the exciting surface areas and the workpieces is expensive and therefore expensive.

From the DE 196 03 579 A1 a form clamping jaws for a clamping device with a clamping frame is already known, each having two mutually opposite pairs, a substantially rectangular frame opening limiting frame legs, arranged with a plurality of in the frame opening of the clamping frame, transversely to the frame plane parallel to each other and independently displaceable clamping tappets, which abut against each other on their side surfaces in tight packing and form with their over the frame opening protruding free end surfaces adaptable to the surface contour of a workpiece clamping surface, and with a clamping ram within the clamping frame gegeneinanderpressenden clamping mechanism arranged in the frame opening, transverse to the direction of displacement Clamping plunger substantially parallel to one of the frame leg pairs laterally against the clamping rod assembly displaceable pressure piece and a pressure piece in the displacement having opposing, abutting against the clamping rod assembly abutment piece, wherein the clamping plunger are pressed under the action of the pressure piece and the abutment piece on their obliquely in the direction of displacement of the pressure piece contact surfaces transversely to the direction against the aligned parallel to the direction frame frame legs. The clamping rams have within the clamping rod assembly in the direction of the pressure piece arrow-like pointed converging contact surfaces. The clamping rams have a square profile with pointing in the direction of displacement of the pressure piece profile tips. In addition, clamping rams are described with hexagonal profile. The abutment piece is formed by the pressure piece in the opposite direction of the frame legs, wherein the abutment piece is displaceable in the opposite direction to the pressure piece against the clamping rod assembly. In this case, the pressure piece should be displaceable by means of an arranged in the adjacent frame leg female thread threaded plunger. Furthermore, the clear width of the frame opening should vary transversely to the direction of displacement of the pressure piece in the substantially parallel frame legs in the course of this frame legs continuously or stepwise. It is also envisaged that the clear width decreases from the movable pressure piece to the fixed abutment piece. The clearance should also be from be moving pressure piece and from the movable Widerla gerstück from the middle of the frame down. The clamping rams are spring-loaded in their direction of displacement. For this purpose, the clamping rams on a rear, axial blind hole for receiving a supported on a frame-fixed support surface compression spring. The support surface is formed by a frame-fixed, parallel to the frame plane support plate. The compression spring is designed as clamped between the support surface and the clamping ram, the gap freely bridging helical compression spring. In this case, the helical compression springs are screwed with their block against each other adjacent Endwindungen on a support surface side and / or Spannstößelseitiges thread. They can also be attached by gluing. The form jaws to ensure a uniform locking of the clamping ram within the clamping frame and be clamped within the rectangular clamping frame in the longitudinal and transverse directions.

in the Body shop of the automotive industry are increasingly being several models or model variants are produced on a production line. For the clamping technology comes for it every model variant, that is for every Component variation, a set of contour pieces to use.

task

Of the Invention has for its object to provide a clamping device, at the time of the complicated Installation and removal of contour pieces when changing models on one and the same production line avoided is and the elaborate decor of the contour pieces, the precise adjustment less expensive is.

solution

The Task is solved by the patent claim 1.

Some advantages

The associated with the clamping arm contour pincushion takes in this solution Impression after release the locking of the individual body parts, in which it with a corresponding negative contour body, the in a magazine for the various to exciting components / workpieces is kept cooperates. Thereafter, the individual clamping body locked in the contour pincushion of the clamping arm again, so that a corresponding new contour is available for that too clamping or exciting workpiece is ready. The counter bearing, in toggle clamps called "jaw", one of the new adjusted contour of the Kontadeladelkissens corresponding contour exhibit.

Of the Tension arm can be used according to the practices of toggle clamps by a certain swing angle be pivotable in one plane, for example by 135 °, so that After opening the clamping arm, the single clamping body in different ways to the new clamping contour can be adjusted. For example, it is possible for the clamping arm to a longitudinal axis of the housing 180 ° from its clamping / clamping position to turn into a position in which he has a desired negative contour a negative contour piece of the magazine in touch or it is also conceivable, the receiving holder for the Kontadeladelkissen around its longitudinal axis around 180 ° from to move the clamping / clamping position into a position in which the Single clamp body after loosening their locking with the respective desired negative contour body in contact can reach, to the desired Clamping contour of the individual clamping body physical contact then set, then the individual clamping bodies are locked again.

All these processes can be in a production control, for example, in a memory Programmable control (PLC) or other numeric Include control of the production line, so by programming the tensioning devices used in the production line, in particular Toggle clamping devices, controlled in the respectively desired position and on the required clamping or clamping contours can be adjusted.

Other inventive embodiments

Further inventive embodiments are in the claims 2 to 21 described.

at Embodiment according to claim 2 is the magazine for formed the Kontadeladelkissen as revolver magazine. Leave it each one needed Contour pincushion in the desired Turn recording or filing position, paying attention to that the respective receiving and storage positions of the revolver take a precisely predetermined locking or locking position.

According to claim 3, the magazine shaft of the revolver magazine is free of play, for example by means of Tapered roller bearing and shaft nut, when using maximum bearing diameter, stored.

Advantageous it is, if - how described in claim 4 - the pivoting, motor driven clamping arm with a housing, for example a console, on a housing arranged the revolver magazine, in particular in one piece, but solvable is attached.

To Claim 5 is the housing the tension arm in the space between the revolver magazine and a the Counter bearing for the component / workpiece having housing arranged. As a result, the clamping arm needs at its opening and clamping movement on the one hand, and when picking up and removing contour pincushion merely to perform a back and forth pivoting movement in a plane, wherein However, it is necessary that the holder in this case too a rotational movement about its longitudinal axis 180 °, so that the contour pincushion the right position to the revolver magazine on the one hand and again to the counter bearing on the other hand (clamping position) can reach.

advantageously, is according to claim 6 a plurality of contour pincushion arranged in the revolver magazine. This can be for the production line in question has all clamping contours ready.

According to claim 7, each contour needle pad is assigned an identical counter bearing.

advantageously, takes the tension arm - like described in claim 8 - in the interference-critical area, especially in the back the clamping device on which the component / workpiece is arranged for clamping, an impression for that relevant component / workpiece and is thereby adjusted to the corresponding clamping contour.

The Contour pincushion is arranged in a holder, which is the clamping arm assigned. This holder can be powered by a motor rotatable in opposite directions of rotation by 180 ° and in each case desired Rotary position also be locked - claim 9.

For this can a swivel or rotary motor - claim 10 for use come, either electrically - claim 11 - or hydraulically - claim 12 or by air pressure - claim 13 - driven can be. Such rotary or swivel motors are known and for sale to acquire.

A further inventive and very advantageous embodiment describes claim 14. Here are the counter bearing with their corresponding contours also arranged in a revolver magazine. The number of abutment advantageously corresponds to the number the Kontailadelkissen in the associated revolver magazine - claim 15th

Also the wave of revolver magazine for that Counter bearing is free of play, for example by means of tapered roller bearings and shaft nut, when using maximum bearing diameter, stored - claim 16th

Especially it is advantageous if according to claim 17 the magazines for the contour pincushion on the one hand and for the counter bearing on the other in a production control, for example in a memory programmable Control (PLC) are included. Then let the individual Work steps, such as changing the contour pincushion and provision the associated counter bearing by appropriately driving the magazine turret control exactly.

As From claim 18, the respective positions are for the Revolving magazine, which serves to arrange the contour pincushion, on the one hand, and the magazine for the counter bearing on the other hand in the desired working position locked or designed lockable. This can be done mechanically or by fluid pressure happen.

at the embodiment According to claim 19, the tensioning arm is part of a toggle lever tensioning device as is widely known in the bodywork of the automotive industry.

at the embodiment According to claim 20, the supply of the Kontadeladelkissen and / or the counter bearing by a handling robot and in the embodiment promotes according to claim 21 the clamping arm of the jig itself the contour needle pad and / or bring the counter bearing from at least one magazine and bring the Contour pincushion and / or the counter bearing in the corresponding position, puts it down and tenses.

In the drawing is the invention - in part schematically - in embodiments illustrated. Show it:

1 a tensioner with a negative contour magazine and an abutment magazine;

2 - 8th various working positions when setting up a new contour of Konturnadelkissens and providing a corresponding abutment.

With the reference number 1 is referred to as a revolver magazine designed negative contour magazine, while the reference numeral 2 one of them at a distance, also designed as a revolver magazine counter bearing magazine shows. Between the two revolver magazines 1 and 2 is a presently designed as a toggle clamping device clamping device 3 arranged.

The negative contour magazine 1 has a housing 4 in which by means of a wave 5 and not illustrated rolling bearing, for example, tapered roller bearing and shaft nut, a rotatable magazine 6 is arranged. The rotatable magazine 6 are numerous on its circumference with preferably uniform angular intervals arranged mutually negative contour body 7 assigned whose contours correspond to the different to exciting or clamped components / workpieces. The rotatable magazine 6 is exactly locked in the desired position. The motor drive of the revolver magazine 1 is included in a manufacturing control, preferably a memory programmable controller (PLC), which is not shown in the drawing. On the rotatable magazine 6 are preferably all for the relevant production line eligible negative contour body 7 arranged.

On the case 4 of the negative contour magazine 1 is via a console 8th the toggle clamp 3 arranged in one piece. The one-piece design can be functional or material-like, whereby functional one-piece construction is understood as meaning one in which the two components are formed 1 and 3 can be removed without destroying each other and material in one piece, the release can be done only after a corresponding destruction. The console 8th For example, by screws or the like on the housing 4 be attached.

The toggle lever device 3 has in the illustrated embodiment, the usual configuration, ie, consists of a piston-cylinder unit (not shown) with a in the cylinder 9 longitudinally displaceable and sealing guided piston, which is to be acted upon alternately on both sides by pressure medium pressure, in particular by compressed air, and the piston rod via a toggle joint arrangement with a clamping arm 10 is connected and this in direction A or B by a predetermined angular amount, in this case by 135 °, drives. This angle amount can also be smaller or larger, depending on the operating conditions.

With the clamping arm 10 is a holder 11 connected in which a rotary or pivoting motor is arranged, which can be driven electrically, hydraulically or pneumatically and the holder 11 rotates 180 ° about its longitudinal axis. The holder 11 is a contour pincushion 12 associated with that on the counter bearing magazine 2 existing counter-bearings, for example 13 , cooperates and the relevant component / workpiece (not shown) clamped. How out 1 it can be seen that the counter bearings 13 like the revolver magazine 1 on a rotatable magazine 14 arranged at a distance from one another via its periphery. The rotatable magazine 14 is also about a wave 15 And not presented Darge bearings, especially tapered roller bearings, stored and gradually in the particular desired position with respect to the Kontailadelkissen 12 controllable. Each of the negative contour bodies 7 of the negative contour magazine 1 corresponds to a contours assigned counter bearing 13 of the rotatable magazine 14 so the number of counter bearings 13 the number of negative contour bodies 7 equivalent. Also the drive of the counter bearing magazine 2 is included in the production control (PLC).

The 2 to 8th let you see the movement when changing the contour of the contour pad.

In 2 became the tension arm 10 already by appropriate pressure medium of the piston of the toggle lever tensioning device 3 pivoted vertically upwards and the holder 11 has already begun its rotation about its longitudinal axis.

In 3 is the tension arm 10 pivoted further and the holder 11 has nearly completed its rotary motion while in 4 the rotation of the holder 11 is finished and the contour pincushion 12 was unlocked and the pincushion on the negative contour body 7 has set. As a result, the needles in the new corresponding to the negative contour body 7 corresponding contour shifted. Subsequently, a locking of the needle-shaped individual clamping body, in turn, for example, with the agents as in the WO 2005/051602 A1 have been described. In this case, the terminals by appropriate pressure medium loading of a piston-cylinder unit, which is associated with the clamping arm and clamped via a toggle lever assembly and a clamping element, the single clamping body or again collectively cancel the clamping. Of course, the invention is not limited thereto. Other drives or means for clamping and releasing the individual clamping bodies may also be considered.

5 already shows the pivoting of the clamping arm 10 in the opposite direction, ie in the direction B, where already the rotational movement of the holder 11 into the starting position.

When displayed in 6 is the tension arm 10 get into the vertical and the holder 11 has continued its rotation, while in the embodiment according to 7 already shortly before putting on the relevant counter bearing 13 is shown, that to the newly set Kontadeladelkissen 12 has matching contour.

8th shows in an enlarged view the placement of the needle-shaped individual clamping body on the associated counter-bearing 13 , Because of However, it was clear that components / workpieces to be clamped in between were omitted.

Summary:

1. Adjustment of the individual clamping body of the Adel contour pillow

• a) The revolver magazine 1 to provide the negative contour body 7 at the same time serves as a storage or console for the clamping device 3 , for example, a toggle lever device.
• b) The negative contours on the negative contour bodies 7 Do not come in direct contact with the relevant component / workpiece, but provide the counter-mold for the individual clamping body of Konturnadelkissens 12 ,
• c) Not shown is the recording of the negative contours in three axes through shims, that means position compensation for each single contour piece in three axes by means of tuning plates.
• d) Storage of the rotatable magazine 6 free of play by tapered roller bearing and shaft nut when using maximum bearing diameter to minimize any tolerances.
• e) Number of contour pieces (= Component or vehicle variants) is arbitrary, depending on the execution size.
• f) Defined takeover position for generating the contour impression of the contour pad on the negative contour bodies 7

2nd counter bearing - Revolver magazine

• a) Serves to absorb the clamping forces.
• b) The contour supports are in direct contact with the component / workpiece.
• c) Not shown is the recording of the contour pads in three axes through shims, that means position compensation for each one Contour support in three axes by means of tuning plates (shims).
• d) Storage of the rotatable magazine 14 using tapered roller bearing and shaft nut when using maximum bearing diameter to minimize any tolerances and to absorb maximum forces.
• e) connection to the clamping technology, for example connection with the clamping device 3 , which is not necessary in all cases.
• f) number of abutments 13 (= Component or vehicle variants) is identical to the number of negative contour bodies 7 in the revolver magazine 1 ,
• g) contours of abutment 13 and contour pincushion 12 are preferably identical.

3. contour pincushion is rotatable on the clamping arm 10 fixed

• a) contour pincushion 12 takes in the Störunkritischen area in the back of the clamping device 3 , for example, the toggle lever device 3 an impression of the negative contour bodies 7 in the revolver magazine 1 ,
• b) The impression pincushion is used for the removal of the impression 12 between the clamping position and the impression clamping position ( 8th ) and impression position ( 4 ) to turn 180 ° to the clamping plane.
• c) The individual clamping bodies of the contour pincushion 12 are unlocked for taking impressions. The forces on the negative contour body 7 of the revolver magazine 1 are low. In defined end position = impression position (determined by a sensor of the clamping unit, for example a toggle lever clamping device 3 ) become the individual clamping bodies of the contour pincushion 12 locks and thereby the contour "stored" and fixed.
• d) Renewal of the contour impression is not necessarily required after each clamping operation, but can be done if necessary. If further clamping operations for a component variant are to be carried out, it is possible to turn the contour pad 12 be waived. Collision situations do not arise as a result.

The in the abstract, in the claims and in the description described as well as apparent from the drawing features can both individually as well as in any combination for the realization of the invention be essential.

Claims (21)

Clamping device ( 3 ), in particular for use in the bodywork of the motor vehicle industry, with a pivotable about a defined pivot angle clamping arm ( 10 ), with an abutment ( 13 ) cooperates with the interposition of an exciting component / workpiece, wherein the clamping arm ( 10 ) and / or the abutment ( 13 ) is associated with at least one contour piece, which cooperates with a juxtaposed surface of the component / workpiece, wherein a plurality of juxtaposed and / or successively arranged rod or needle-shaped Einzelklemmkörper with mutually facing surfaces parallel to each other and against each other liftable against the restoring force of at least one, for example pressure spring element are guided and locked together in the respective desired stroke position of each individual clamping body, but also jointly formed detachable (contour pincushion 12 ), characterized in that in a magazine ( 1 ) Negative contour body ( 7 ) for various components / Werkstü are arranged, which the contour pincushion ( 12 ) after releasing the locking of the individual clamping body by placing the Kontadeladelkissens ( 12 ) on the negative contour body ( 7 ) and moving the individual clamping body to the new contour, whereupon the individual clamping bodies can be arrested in the contour taken in each case and are fitted with a contours-fitting counter bearing ( 13 ) interact. Clamping device according to claim 1, characterized in that the magazine ( 1 ) for the negative contour body ( 7 ) as revolver magazine ( 1 ) is trained. Clamping device according to claim 2, characterized in that a shaft ( 5 ) of the revolver magazine ( 1 ) free of play, for example by means of tapered roller bearings and shaft nut, when using maximum bearing diameter, is stored. Clamping device according to claim 1 or one of claims 2 and 3, characterized in that the pivoting, motor-driven clamping arm ( 10 ) with a first housing ( 9 ) on a second housing ( 4 ) of the magazine ( 1 ) for the negative contour body ( 7 ) is arranged. Clamping device according to claim 4, characterized in that the first housing ( 9 ) in the space between the magazine ( 1 ) for the negative contour body ( 7 ) and an abutment magazine ( 2 ) for the abutments ( 13 ) is arranged. Clamping device according to claim 1 or one of claims 2 to 5, characterized in that a plurality of negative contour bodies ( 7 ) in the associated magazine ( 1 ) is arranged. Clamping device according to claim 1 or one of claims 2 to 6, characterized in that each negative contour body ( 7 ) a corresponding abutment ( 13 ) is associated with matching contour. Clamping device according to claim 1 or one of claims 2 to 7, characterized in that the clamping arm ( 10 ) in the interference-critical area an impression for the relevant component / workpiece of the associated negative contour body ( 7 ) of the magazine ( 1 ) and thereby the contour needle pad ( 12 ) sets to the particular desired contour. Clamping device according to claim 1 or one of claims 2 to 8, characterized in that the contour needle pad ( 12 ) in a holder ( 11 ) is arranged, which is rotatable by a motor drive by preferably 180 ° and in the respectively desired position, or the entire clamping arm ( 10 ) is rotatable by 180 °. Clamping device according to claim 9, characterized that the motor drive is designed as a swivel or rotary motor is. Clamping device according to claim 10, characterized that the pivoting or rotating motor is electrically driven. Clamping device according to claim 10, characterized that the pivoting or rotating motor is hydraulically driven. Clamping device according to claim 10, characterized that the swivel or rotary motor is pneumatically driven. Clamping device according to claim 10 or one of claims 2 to 13, characterized in that the abutment ( 13 ) also in a rotatable revolver magazine ( 14 ) are kept ready. Clamping device according to claim 1 or one of claims 2 to 14, characterized in that the number of abutment ( 13 ) the number of negative contour bodies ( 7 ) corresponds. Clamping device according to claim 14 or 15, characterized in that a magazine shaft ( 15 ) of the counter bearing magazine ( 2 ) also free of play, for example by means of tapered roller bearings and shaft nut, when using maximum large bearing diameter, is stored. Clamping device according to claim 1 or one of claims 2 to 16, characterized in that the control of the magazines ( 1 and 2 ) is included in a memory programmable controller (PLC). Clamping device according to claim 1 or one of claims 2 to 17, characterized in that the angular positions of the revolver magazines ( 1 and 2 ) are formed latchable or lockable. Clamping device according to claim 1 or one of claims 2 to 18, characterized in that the clamping arm ( 10 ) Is part of a knee lever tensioning device. Clamping device according to claim 1, characterized in that the supply of the Kontadeladelkissen ( 12 ) and / or the abutment ( 13 ) is vornehmbar by a handling robot. Clamping device according to claim 1, characterized in that the clamping arm ( 10 ) the contour pincushion ( 12 ) and / or the abutments ( 13 ) from a magazine ( 1 . 2 ), transported and in places the working position and, if necessary, tensions.