DE19857415A1 - Clamping device, e.g. for positioning sheets in assembling vehicle bodywork, with flat support surface on clamping bracket - Google Patents

Abstract

The clamping device includes a clamping bracket with a pressure piece and/or resting piece which is adjustable in two directions in space. A flat support surface (4) is made on the clamping bracket (2), on which the pressure and/or resting piece (3) rests via a changeable setting plate (5) The thickness of the setting plate forms a certain setting position in the clamping force direction.

Description

The invention relates to a clamping device according to the preamble of the saying 1.

Known clamping devices are used, for example, for exact setting development of printing and / or support pieces, in particular for positioning of vehicle sheets in the body shop. For a precise assembly different sheet metal parts to a car body, it is necessary to do this to be fixed exactly during the welding process. This is done by means of a clamping point len, in which these vehicle sheets through such pressure and support pieces be brought to their target position in the vehicle network.

For this purpose, it is known in a generic tensioning device, such Pressure and / or support pieces to be at a right-angled angle part fasten, which in turn is attached to a tensioning bracket. By one insert tuning plates of different thicknesses between the clamping console and the angle part as well as between the pressure and / or Aufla pieces and the angular part can be the respective print and / or edition piece with respect to the angle leg of the angle part in two spatial directions be moved and adjusted. If a third tuning axis in a third spatial direction orthogonal to the first two spatial directions gene is needed, can be another, perpendicular to the first Angle part standing angle part with an additional tuning plate  be applied. With the help of these known adjustment measures Print and support pieces quickly and easily to the desired size in Vehicle network can be set. Next is also by replacing Adjustment plates an adjustment of the pressure and / or support pieces possible, possibly with different material qualities and tensions of the vehicle sheets, in particular in a readjustment range from approx. ± 2.5 mm may be required.

The disadvantage of this type of adjustment is the tension force support the angular parts on which unfavorably large bending moments act. In addition the available clamping range of the clamping brackets is determined by the angle part le restricted.

In addition, a device for clamping workpieces, in particular for clamping electrode body blanks for EDM machines NEN known (DE 33 47 403 C1) with a clamping chamber in which a Zen is carried out by means of base plates and clamping screws. On Pressure on a workpiece corresponding to a clamping force in a clamping unit direction would be unfavorable here only via the clamp with the danger be supported by adjustments.

Next is a clamping plate with a grid-shaped hole arrangement be knows (DE 33 16 743 A1), with eccentric clamping disks in holes pluggable and for holding a body lying on the clamping plate are rotatable. A correct setting and adjustment of Pressure and / or support pieces, in particular for holding vehicles Sheet metal parts in the body shop is not possible with such an arrangement Lich.

The object of the invention is to provide a generic tensioning device a connection between a tensioning bracket and one attached to it, little  at least adjustable in two spatial directions attached pressure and / or on position piece so that with good adjustment function and easier Handling improves the power support and reduces the space requirement become.

This object is achieved with the features of claim 1.

According to claim 1 is on the clamping bracket transverse to the direction of clamping force created a flat support surface on which the print and / or edition piece is supported on an interchangeable tuning plate, the respective thickness of the tuning plate of a certain setting position in clamping direction of force is adapted as the Y-spatial direction. (To define the Ratim directions, the clamping force direction is assumed as the Y-spatial direction men and the corresponding orthogonal transverse directions are as Y-Rich direction and Z direction).

On the clamping bracket is parallel to the clamping force direction and orthogonal to the support surface created a flat contact surface on which the pressure and / or Support piece with an assigned, flat counter contact surface for positioning across the clamping direction as a Z-space direction tung.

A cross is given to the support level and cross to the contact surface A replaceable tuning body is attached to the tensioning bracket which the pressure and / or support piece with another counter abutment che for positioning, the respective size of the Ab tuning body of a certain setting position transverse to the clamping direction is adapted as the X direction.

For the fixed connection of the clamping bracket and the pressure and / or Aufla pieces in the by voting plate choice and voting body choice  certain setting position is at least one screw connection ver turns. A screw with a screw bolt is orthogonal to the support surface through an opening of the clamping bracket and in an associated threaded bore of the pressure and / or support piece screwed (or alternatively through a push-through opening of the pressure and / or Support piece guided and in a threaded bore of the clamping console screwed in, the screw with a screw head preferably over a washer opposite the support surface on the clamping bracket (or alternatively on the pressure and / or support piece) supports. The diameter of the opening is larger than that of the screws bolt diameter, so that there is a space between them, the the max. Adjustment range between the clamping console and pressure and / or open position piece transverse to the direction of clamping force. This relatively small one Adjustment range can also be used for readjustments the.

With such an arrangement, a direct, straight introduction of force and Support of the chip force from the pressure and / or support piece in the Clamping bracket reached. In addition, the space required for such an arrangement small, so that the available clamping range of the clamping brackets is better is usable. Furthermore, the setting can be carried out simply and precisely. The The arrangement itself is also simple and inexpensive to manufacture bar.

For an improved mounting and connection is with claim 2 beaten, at least two against each other parallel to the contact surface offset screw connections between the clamping console and the To provide pressure and / or support piece. It is also according to claim 3 expedient, at least one screw bolt for a captive Bracket of the tuning plate also by a through attached there lead opening.  

Basically, it is necessary that there is a space between the screw bolts and the push-through opening in the clamping console for settings purposes. Such is preferably according to claim 4 slot opening as a hole with an oversize compared to screwing bolt manufactured. Alternatively, a long can also be used as a push-through opening hole can be used.

In a first specific embodiment of a tuning body according to Claim 5 is proposed to run this as a tuning cylinder. For different settings in the X direction are then appropriate Use tuning cylinders with different diameters. The each selected tuning cylinder is in using a dowel pin an assigned dowel hole or by means of a screw attachment held in an associated threaded hole on the support surface.

In a second, alternative embodiment of a tuning body this according to claim 6 made in two parts from one on the Spannkon sole attached adapter and a second, exchangeable tuning plate between the adapter and the pressure and / or support piece. Consequently can also be changed here by changing to another tuning plate a different setting in the X direction become. In addition, a fixing screw is preferably on as a lag screw Adapters are provided in a threaded bore of the pressure and / or on position for fixing the system position before tightening the at least one screw connection is screwed in. So that will partially prevents that when tightening the screw connection between the clamping bracket and the pressure and / or support piece for the X setting relevant system connection to the adapter or the assigned did not arrange second tuning plate due to clumsy handling is observed.  

In an advantageous development according to claim 7 is also pre- beat, in a row in the X direction several against each other like a grid offset through openings or threaded holes for screw conn bindings and dowel holes or grid pins Make threaded holes for attaching the tuning body. As a result, a rough can be made using this predetermined grid setting can be made, which is then by using suitable Ab Tuning bodies and tuning plates for a certain exact setting can be refined. If these two rows against each other in Z- Direction are offset, it is also achieved that the pressure and / or on position piece (especially in an embodiment according to claim 8) not can be mounted upside down.

With the features of claim 8, the support surface is proposed through two parallel contact surfaces to form a guide groove to form, in which the pressure and / or support piece engages positively and can be moved in the X direction within the setting range. In order to is a positioning in the Z direction from the start without further on possible setting.

In an alternative embodiment according to claim 9 is an additional che adjustment option provided in the Z direction, with another changeable tuning plate between the one contact surface on the Clamping console and the associated one counter surface on the pressure and / or Support piece is provided. To ensure accurate positioning and Obtaining fixation in the Z direction is a screw with claim 10 proposed connection similar to the screw mentioned above connection is made and to open a setting option here too there is a space between the corresponding bolt and has the push-through opening.  

In a practice-proven embodiment according to claim 11 Screws with a bolt diameter of 8 mm and Boh throughput of the assigned push-through openings with 13 mm used, so that there is a maximum, each assigned A adjustment range of ± 2.5 mm results, whereby also according to the voting plate and tuning bodies of different thicknesses and sizes are available stand or can be manufactured if necessary. Will be expedient also the grid with holes and / or threaded holes and / or dowel pin receptacles and / or elongated holes so that by changing the plug a wide setting range with all intermediate positions is covered.

One of the clamping devices specified above is particularly advantageous as part of a positioning device for vehicle sheets at Ka Rossi construction can be used.

The invention is explained in more detail with reference to a drawing.

Show it:

Fig. 1 is a schematic side view of a first embodiment of a clamping device,

Fig. 2 is a schematic front view of the clamping device according to Fig. 1,

Fig. 3 is a plan view of the clamping device according to Fig. 1,

Fig. 4 is a schematic sectional view taken along the line AA of Fig. 3,

Fig. 5 is a schematic side view of a second embodiment of a clamping device,

Fig. 6 is a schematic front view of the clamping device according to Fig. 5,

Fig. 7 is a schematic plan view of the clamping device according to Fig. 5,

Fig. 8 is a schematic view of an adapter of a Abstimmkör pers,

Fig. 9 is a schematic sectional view taken along line AA of FIG. 7,

Fig. 10 is a schematic representation of a third embodiment of a clamping device,

Fig. 11 is a schematic front view of the clamping device according to Fig. 10,

Fig. 12 is a schematic plan view of the clamping device according to Fig. 10,

Fig. 13 is a schematic view of an adapter of a Abstimmkör pers,

Fig. 14 is a schematic sectional view taken along the line AA of Fig. 12,

Fig. 15 is a schematic side view of a fourth embodiment of a clamping device,

Fig. 16 is a schematic front view of the clamping device according to Fig. 15,

Fig. 17 is a schematic plan view of the tensioning device of Fig. 15, and

FIG. 18 shows a schematic sectional illustration along the line AA of FIG. 17.

In Figs. 1 to 4 show a first embodiment of a clamping device 1 is shown as part of a positioning device for vehicle of sheets during Ka rosseriebau in different views. This Spannvor device 1 includes a clamping bracket 2 , on which a pressure and / or Aufla piece 3 is adjustably attached. The setting can be made in this embodiment in accordance with the coordinate system shown in the figures in an X and Y spatial direction. On the clamping bracket 2 , a planar support surface 4 is created which is oriented transversely to the clamping force direction (force in the negative Y spatial direction). On this support surface 4, the pressure and / or support member 3 is supported by means of a removable shim. 5 Via the respective thickness of said tuning plate 5, the pressure and / or support piece 3 can be adapted to a certain, predetermined set position in the Y-direction in space.

As can be seen in particular from Fig. 2, should be returned to the Spannkonso 2 is a U-shaped guide groove 6 is formed, forming the U-legs aligned parallel to the tension force direction and orthogonal to the supporting surface 4 plant surfaces 7. The pressure and / or support piece 3 with correspondingly assigned, planar counter-contact surfaces 8 is in a form-fitting manner against these flat contact surfaces 7 . Via these contact surfaces 7 and counter-contact surfaces 8 , the pressure and / or support piece 3 is positioned transversely to the clamping force direction in a Z-spatial direction.

As can be seen from Fig. 4, which shows a section along the line AA of Fig. 3, a replaceable Abstimmzylinder 9 is fixed to the clamping bracket 2 in the guide groove. 6 At this tuning cylinder 9 , the printing and / or support piece 3 with another counter-surface 10 for a specific, predetermined positioning of the printing and / or support piece 3 in the X-spatial direction. For different settings in the X-spatial direction, tuning cylinders 9 with different diameters are available. The fixing of the tuning cylinder 9 can be carried out by means of a dowel pin or also by means of a screw fastening, which is not shown in FIG. 4, however.

The tensioning bracket 2 and the pressure and / or support piece 3 are firmly connected in the respective setting position via two screw connections 11 , 12 . These screw connections 11 , 12 each include a screw 13 , which is orthogonal to the support surface 4 with a screw bolt 14 through two staggered through-openings 15 , 16 of the clamping bracket 2 and is screwed into correspondingly assigned threaded holes 17 , 18 of the clamping bracket 2 . The screws 13 are supported with their screw heads on a washer on the tensioning bracket 2 . The screw bolt 14 of the screw connections 11 , 12 is, as shown in FIG. 4, also through correspondingly assigned through openings 19 , 20 of the tuning plate 5 leads GE.

As can be seen further from FIG. 4, the Öffnungsdurchinesser of the through-openings 15, 16 is greater than the diameter use screw benbolzen 14, so that between the screw bolt 14 and push-through openings 15, 16 a Freiraummaß result, the max to. Setting range between the clamping bracket 2 and the pressure and / or support piece 3 transverse to the clamping force direction for readjustments. The screw benbolzameter here is 8 mm and the bore diameter of the through openings 15 , 16 is 13 mm, so that there are predetermined setting ranges of ± 2.5 mm.

As can be seen schematically in FIG. 3, the holes formed in the clamping bracket 2 , which form the push-through openings 15 , 16 and threaded holes, are offset from one another in a grid-like manner. This prevents reverse mounting.

In Figs. 5 to 9, a second embodiment of a clamping device 21 is shown that up to the Abstimmzylinder 9 construction identical to that on which is shown in Figs. 1 to 4 shown first embodiment of the clamping device 1. In this respect, reference can therefore be made to the above statements. Instead of the tuning cylinder 9 , a tuning body 22 is provided in the Spannvor direction 21 . This tuning body 22 is constructed in two parts from an adapter 23 shown schematically in FIG. 8 and a second, exchangeable tuning plate 24 . This second tuning plate 24 is, as can be seen in particular from FIG. 9, between the adapter 23 and the pressure and / or support piece 3 is arranged. Depending on the strength of this tuning plate 24 , a different setting in the X-spatial direction can be specified.

As is further apparent from Fig. 9, a fixing screw 25 is provided, which is screwed into a correspondingly assigned threaded bore of the pressure and / or support piece 3, to the printing / or contact piece and 3, prior to tightening of the screw connections 11 12 to fix in the investment position. As a result, when tightening the screw connections 11 , 12 between the tensioning bracket 2 and the pressure and / or support piece 3, the position connection relevant for the X setting can be observed. The adapter itself is set via a white mounting screw 26 on the clamping bracket 2 .

In Figs. 10 to 14 a further embodiment is a Spannvorrich tung shown 27th The structure of this clamping device 27 corresponds essentially to the structure of the clamping device 21 of the second embodiment. In contrast to this, the pressure and / or support piece 28 has flange extensions 29 , 30 at the end of the tensioning bracket, in each of which a push-through opening 31 , 32 is formed. For fixed connec tion of the clamping bracket 36 with the pressure and / or support piece 28 in the predetermined setting position, two screw connections 33 , 34 are used here. Here, as shown in Fig. 14, a screw 35 with a screw 37 through the Durchstecköffnun conditions 31 , 32 of the pressure and / or support piece 28 out and screwed accordingly in corresponding threaded holes 38 , 39 of the clamping bracket 36 . The screws 35 are supported with a screw head via a washer on the pressure and / or contact piece 28 . The free space dimension here results here compared to the first two embodiments, in that the diameter of the through openings 31 , 32 in the flange extensions 29 , 30 of the pressure and / or support piece 28 is larger than the bolt diameter of the screws 35 .

In Figs. 15 to 18 a fourth embodiment is a Spannvorrich processing 40 schematically illustrated. This clamping device 40 comprises an L-shaped clamping bracket 41 , which has a flat support surface 42 transverse to the clamping force direction. A pressure and / or support piece 43 is supported on this support surface 42 via an exchangeable tuning plate 44 . About the thickness of this tuning plate 44 can be made in the Y-space direction according to the previous embodiments.

Due to the L-shaped design of the clamping bracket 41 , a flat contact surface 45 is also formed parallel to the clamping force direction and orthogonal to the support surface 42 . A third, interchangeable tuning plate 47 can be arranged between this contact surface 45 on the clamping console 41 and an associated counter contact surface 46 on the pressure and / or support piece 43 . In this embodiment, in addition to a setting in the X and Y spatial directions, a setting in the Z spatial direction is now also possible in this embodiment. The adaptation to a specific, predetermined setting position in the Z spatial direction can in turn take place here via the thickness of the tuning plate 47 used .

A screw connection 48 is provided for precise positioning and fixing in the Z-spatial direction. This screw connection 48 comprises a screw 49 which is benbolzen orthogonal to the contact surface 45 with a screw through a push-through opening of the pressure and / or support piece 43 and the tuning plate 47 and is screwed into a correspondingly assigned threaded bore on the contact surface 45 , which is in Figs. 15 to 18 is not shown in detail. The opening diameter of this push-through opening is in turn larger than the diameter of the screw bolt, so that this results in a clearance which also determines the setting range in the Y direction and in the X direction. In dependence on the setting position in the X-spatial direction, a plurality of threaded bores 52 in the X-direction are arranged one behind the other on the mounting surface 45 forming the tensioning bracket part.

Claims (12)

1. tensioning device,
with a tensioning bracket and a pressure and / or support piece attached to it, adjustable at least in two spatial directions,
characterized by
that on the clamping bracket ( 2 ; 36 ; 41 ) transversely to the clamping force direction, a flat support surface ( 4 ; 42 ) is created on which the pressure and / or support piece ( 3 ; 28 ; 43 ) is supported by an exchangeable tuning plate ( 5 ) is, the respective thickness of the tuning plate ( 5 ) be adapted to a certain setting position in the clamping force direction as the Y-spatial direction,
that on the clamping bracket ( 2 ; 36 ; 41 ) parallel to the clamping force direction and orthogonal to the support surface ( 4 ; 42 ) at least one flat contact surface ( 7 ; 45 ) is created on which the pressure and / or support piece ( 3 ; 28 ; 43 ) with an assigned, flat counter abutment surface ( 8 ; 46 ) for positioning transversely to the clamping force direction as Z-space direction,
that transversely to the support plane and to the contact surface ( 7 ; 45 ) at a given location of the clamping bracket ( 2 ; 36 ; 41 ) an exchangeable from tuning body ( 9 ; 22 ) is attached to which the pressure and / or support piece ( 3rd ; 28 ; 43 ) with another counter abutment surface ( 10 ) for po sitioning, the respective size of the tuning body ( 9 ; 22 ) being adapted to a specific setting position transverse to the clamping force direction as the X direction, and
that at least one screw connection ( 11 , 12 ; 33 , 34 ) is used to connect the clamping bracket ( 2 ; 36 ; 41 ) and the pressure and / or support piece ( 3 ; 28 ; 43 ) with a screw ( 13 ; 35 ; 39 ), which is orthogonal to the support surface ( 4 ; 42 ) with a screw bolt ( 14 ) through a push-through opening ( 15 , 16 ) of the clamping bracket ( 2 ; 41 ) and into an associated threaded bore ( 17 , 18 ) of the pressure - And / or support piece ( 3 ; 43 ) is screwed in or, conversely, through a through opening ( 31 , 32 ) of the pressure and / or support piece ( 28 ) and into an associated threaded bore ( 38 , 39 ) of the clamping bracket ( 36 ) is screwed on and is supported with a screw head, preferably via a washer opposite the support surface ( 4 ; 42 ) on the clamping bracket ( 2 ; 41 ) or vice versa on the pressure and / or support piece ( 28 ), the opening pressure h greater than the bolt diameter and the resulting free space dimension the maximum adjustment range between the clamping bracket ( 2 ; 36 ; 41 ) and pressure and / or support piece ( 3 ; 28 ; 43 ) transverse to the clamping force direction. 2. Clamping device according to claim 1, characterized in that we at least two parallel to the direction of the contact surface ( 7 ; 45 ) against each other offset screw connections ( 11 , 12 ; 33 , 34 ) are used. 3. Clamping device according to claim 1 or claim 2, characterized in that the screw bolt ( 14 ; 37 ) of the at least one screw connection ( 11 , 12 ; 33 , 34 ) through an associated through opening ( 15 , 16 ; 31 , 32 ) of Tuning plate ( 5 ) is guided. 4. Clamping device according to one of claims 1 to 3, characterized in that the through hole ( 15 , 16 ; 31 , 32 ) assigned to the at least one screw connection ( 11 , 12 ; 33 , 34 ) has an oversize hole compared to the screw bolt ( 14 ; 37 ) or an elongated hole in the X direction. 5. Clamping device according to one of claims 1 to 4, characterized in
that the tuning body is a tuning cylinder ( 9 ), wherein for different settings in the X-direction interchangeable tuning cylinders ( 9 ) are available with different diameters, and
that the respective tuning cylinder ( 9 ) by means of a dowel pin in an associated dowel pin bore or by means of a screw fastening in an associated threaded bore on the support surface ( 4 ) is held. 6. Clamping device according to one of claims 1 to 5, characterized in that a fixing screw ( 25 ) is provided with which the contact position between the tuning body ( 22 ) and the pressure and / or support piece ( 3 ; 28 ) before tightening the at least one screw connection ( 11 , 12 ; 33 , 34 ) can be secured and fixed, the tuning body ( 22 ) in two parts from an adapter ( 23 ) attached to the tensioning bracket ( 2 ; 36 ) and a second exchangeable tuning plate ( 24 ) between the adapter ( 23 ) and the pressure and / or support piece ( 3 ; 28 ) and the fixing screw ( 25 ) is held as a tension screw on the adapter ( 23 ) and in a threaded bore of the pressure and / or support piece ( 3 ; 28 ) is screwed in. 7. Clamping device according to claim 5 or claim 6, characterized in that in a row in the X direction several against each other of the grid-like through openings ( 15 , 16 ) and / or Ge threaded holes for screw connections ( 11 , 12 ; 33 , 34 ) attached are and correspondingly in a row in the X direction, a plurality of grid pin holes or threaded holes, which are offset from one another in a grid-like manner, are attached for fastening the tuning body ( 9 ; 22 ), where appropriate both rows are set against one another in the Z direction. 8. Clamping device according to one of claims 1 to 7, characterized in that two parallel contact surfaces ( 7 ) are provided, which together with the support surface ( 4 ) form a guide groove ( 6 ) into which the pressure and / or Support piece ( 3 ) engages positively and can be moved in the X-direction within the setting range. 9. Clamping device according to one of claims 1 to 7, characterized in that for an additional adjustment option in the Z-Rich direction between the one contact surface ( 45 ) on the clamping bracket ( 41 ) and the associated one counter-contact surface ( 46 ) on the pressure and / or support piece ( 43 ) an optionally third exchangeable tuning plate ( 47 ) is inserted, the respective thickness of this tuning plate ( 44 ) being adapted to a specific setting position in the Z direction. 10. Clamping device according to claim 9, characterized in that as a further connection between the clamping bracket ( 41 ) and the pressure and / or support piece ( 43 ) at least one further screw connection ( 48 ) is used with a further screw ( 49 ) orthogo nal to the contact surface ( 45 ) with a screw bolt through a push-through opening of the pressure and / or support piece ( 43 ) and the third tuning plate ( 47 ) and is screwed into an associated threaded bore of the clamping bracket ( 41 ) and thereby with a screw head is preferably supported by a washer against the bearing surface ( 45 ) on the pressure and / or support piece ( 43 ), the opening diameter of the push-through opening in the pressure and / or support piece ( 43 ) being larger than the screw bolt diameter and the resulting free space the maximum setting range determined in particular in the Y direction and X direction. 11. Clamping device according to one of claims 1 to 10, characterized in that the screw bolt diameter 8 mm and the bore diameter of the assigned push-through openings ( 15 , 16 ; 31 , 32 ) are 13 mm, so that the maximum setting ranges predetermined thereby ± 2.5 mm and tuning plates ( 5 ; 24 ; 44 ) of different thicknesses as well as tuning bodies as tuning cylinders ( 9 ) of different sizes corresponding to this maximum adjustment range are available. 12. Clamping device according to one of claims 1 to 11, characterized in that the clamping device ( 1 ; 21 ; 40 ) is part of a positioning device for vehicle panels in body construction.