EP1459814A1 - Device for removing dents from sheet metal parts - Google Patents

Device for removing dents from sheet metal parts Download PDF

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Publication number
EP1459814A1
EP1459814A1 EP04006194A EP04006194A EP1459814A1 EP 1459814 A1 EP1459814 A1 EP 1459814A1 EP 04006194 A EP04006194 A EP 04006194A EP 04006194 A EP04006194 A EP 04006194A EP 1459814 A1 EP1459814 A1 EP 1459814A1
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EP
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Prior art keywords
device
support
sheet metal
unit
working unit
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EP04006194A
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German (de)
French (fr)
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EP1459814B1 (en
Inventor
Ralph Meichtry
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Ralph Meichtry
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Priority to CH4252003 priority Critical
Priority to CH4252003 priority
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D1/00Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
    • B21D1/06Removing local distortions

Abstract

The device has a working unit supported on a bearer unit (14,18,20), with a tool at one end for temporary connection to the panel. The working unit has a self-locking spindle (44) moveable along its longitudinal axis (60) and supported on an abutment of the bearer (12). Either spindle or abutment is fixed, and the other one is turnable via a ball bearing. The working unit has an integrated welding tip and a power connection, or it may be combined with a welding tool. It may also have a lever mechanism.

Description

  • The invention relates to a device for bulging sheet metal parts according to the features of the preamble of claim 1, as well as a device set and a working unit for such a device.
  • If in the following we speak of dents or bulges, we mean primarily concave deformations of a sheet metal part.
  • The effort and cost of repairing dents on sheet metal parts, especially on vehicles, are considerable. Various methods and devices are known from the prior art which are intended to enable such sheet metal parts to be repaired at low cost. These are usually based on the fact that the dent is removed by applying a force to the center of the dent. Various approaches are known for introducing the forces required for bulging into a sheet metal part. One of the goals here is to apply the force in such a way that extensive post-processing of the sheet metal part is avoided as far as possible. Another goal is to enable simple and inexpensive construction and easy handling.
  • Examples of devices for bulging sheet metal parts have been shown in US4116035 and US4050271. In these devices, the sheet metal is pierced in the area of the dent and the necessary tensile force is then introduced into the sheet metal part with the aid of a pulling element. Either a hook or the drill directly serves as the pulling element. The use of these devices leads to paint damage and partial destruction of the sheet metal part, which necessitates a correspondingly complex post-processing. The devices shown either have no support that can be placed on the sheet metal part, which makes handling very difficult, or the support is so inflexible and restricted to a narrow area around the tension element that the support is absolutely inadequate for larger bulges.
  • Other devices, such as those described in EP 0544191 and EP 0992313, have an integrated welding tip that can be fed with current as a tension element. The welding tip is connected via a pulling unit to a lever mechanism that is operated by hand. First the welding tip is firmly welded onto the sheet metal part. Then, with the help of the lever mechanism, the tensile force is introduced into the dented sheet metal part via the pulling unit and the welding tip and the bulge is pulled out and finally the welding tip is removed again from the bleaching part. With this type of device, both the partial destruction of the sheet metal part and complex post-processing are avoided. However, the handling of these devices is also quite difficult since the provided support on the sheet metal part is insufficient and tends to tilt. In the worst case, even the welding tip can be torn off the sheet. Since the device obstructs the view of the dented area when it is placed on the sheet metal part, it is also very difficult to weld the welding tip exactly at the location of the greatest deformation, which is also detrimental to the optimal entry of the tensile force into the dented sheet. Also, bumps of different sizes can hardly be processed with one and the same device, since the support only covers a defined size of bumps and can only be worked with a single pulling element on the sheet metal part. Because the tension element with the welding tip is not electrically insulated from the lever mechanism and therefore also from the support, undesirable effects during welding can also occur if the support is insufficiently insulated from the bleaching part.
  • In another genus of bulge devices, the tension elements are welded or glued in the area of the bulge before the device is put on. A traction unit of the device is then connected to the traction element and the tensile force is then introduced into the dented area of the sheet metal by a lever mechanism connected to the traction unit. Such devices are, for example. in EP0783926 or in the German utility model DE-U1-9315560. Both devices have as a pulling unit a threaded element for adjusting the height distance, which is equipped with a hook at its end facing the sheet metal. With this hook a simple connection to the one or more temporarily connected to the sheet Tension elements are manufactured. The traction unit is supported on a cross member, which in turn is supported on the sheet metal part by means of support devices. The support devices have feet which are adjustable in their angular position about an axis extending transversely to the cross member, which ensures a certain support of the device even during manual operation of the lever mechanism. The height of the support devices can also be adjusted in D-U1-9315560. For the EP078392, the support devices that can be moved along the cross member and the traction unit that is displaceably mounted on the cross member provide somewhat greater flexibility with regard to the machinable dents. The device according to EP0856366 also works with a thread but without a lever mechanism, although it is not clear how the mechanism for introducing the tensile force works. The support devices of this device are also adjustable in the direction transverse to the cross member in their angular position and adjustable in height.
  • Although these types of devices offer a certain amount of support and avoid partial destruction of the sheet metal part because the pulling element or elements are welded or glued on, the manufacturing costs for the devices with the lever mechanisms are very high. A lot of different components have to be manufactured and assembled, which is time-consuming and therefore expensive. Even if a translation of the forces is or can be effected by means of the lever mechanism, the actuation of the lever mechanism for bulging the sheet metal part nevertheless requires considerable force and skill. Due to the lever mechanism, the device can only be used as a pulling device. Adaptation to different bulge sizes or even to different sizes or differently bent sheet metal parts is also possible only to a very limited extent with these devices.
  • The object of the present invention is to provide a device for bulging sheet metal parts, which is simple and inexpensive to manufacture and which enables simple handling. Another object is to design the device in such a way that it can be used with different bulge sizes and shapes, as well as with different sheet shapes and sizes.
  • This object is achieved by an inventive device for bulging sheet metal parts, as defined by the features of claim 1. As well as a device set according to claim 10 and a work unit for such a device according to claim 12.
  • The device according to the invention for bulging sheet metal parts has a working unit according to the invention, which can be supported on a supporting structure of the device. The work unit has a spindle that serves to generate the tensile force. The spindle is supported in an abutment on the supporting structure. The spindle can be connected to a working element (tie rod) to introduce the tensile force into the bleaching part. Since such a device has much fewer components than a device with a lever mechanism, it is much simpler and cheaper to manufacture. Manageability is also much easier because turning a threaded spindle can be done in a much more controlled manner than actuating a lever mechanism.
  • In a preferred embodiment, the spindle is displaceable in its axial direction, but is arranged in a rotationally fixed manner, and the abutment is arranged in a rotatable manner. In order to reduce frictional forces and to ensure a fine adjustment, the abutment is preferably supported by means of a ball or plain bearing.
  • Alternatively, there is the possibility of rotating the spindle and arranging the abutment in a fixed position. In this embodiment, the connection to the working element generally has a rotation-free coupling which prevents the working element from being rotated unintentionally or from being separated from the component to be repaired. The spindle is preferably designed to be self-locking, so that no separate locking is necessary. The self-locking spindle further simplifies handling and allows very precise work.
  • In a preferred embodiment, the threaded spindle is provided with a coupling device for simple turning. General is this Coupling device designed so that aids for manual operation, for example. a ratchet or the like can be operatively connected to the threaded spindle. In addition, in certain embodiments of the working unit according to the invention, the necessary bulging force can be introduced not only in the form of tensile force but also in the form of compressive force, which not only allows dents to be pulled out but also to push out dents. Another advantage is that the turning or pushing path can be maintained more precisely than with a lever mechanism known from the prior art.
  • If the work unit can be operated with the aid of a motor, handling is further simplified. For this purpose, the coupling device can be designed such that the second threaded element is connected to an external motor, e.g. a drill can be connected, or the work unit is connected to an internal motor integrated into the device.
  • Is a work item on the work unit e.g. If a welding tip is permanently installed, a connection for the required welding current can also be provided. Instead, however, a coupling element can also be provided that can be connected to working elements fixed on the sheet metal. A modular structure is also conceivable. For example, the working unit can be provided with a connecting device which serves to accommodate differently designed coupling elements. In this way it is possible to work with a wide variety of work elements individually or with entire groups of such elements without there being any compatibility problems.
  • In a preferred modular embodiment of the device according to the invention, a plurality of work units can also be provided, which can be fixed individually or next to one another on the support structure at variable positions. In this way, loads can be introduced at various points and bulges can be efficiently dented.
  • The support structure of the device according to the invention has a support unit and at least one support device, which can be assembled and disassembled in a simple manner if necessary. In a preferred embodiment, the support unit has a cross member. It is particularly advantageous if, instead of using fixed spacer elements, the two spars are held at a defined distance from one another by means of fixing elements which can be moved on them and can be fastened at any position. Advantageously, the fixing elements also serve to fix other items such as e.g. the work unit or the support devices on the cross member.
  • The fixing elements can also simply be used as stabilizing elements. For this purpose, they are operatively connected to the spars in such a way that they hold the spars at a defined distance and at the same time press against one another. In this way, the fixing elements prevent buckling of the spars, which would otherwise occur under load, which increases the bending strength of the cross member as a whole and thus has a stabilizing effect.
  • Normally, two support devices are arranged on both sides of the work unit for stable support. In the device according to the invention, both the working unit and the support devices can be positioned at different locations on the carrying unit and thus span bumps of different sizes, the working unit being able to be positioned in an optimized manner on the bump shape. With large spans, more than two support devices can be connected to the support unit. Another advantage of this modular structure is that the device e.g. space-saving for transportation purposes. If two spars are provided as cross members, the cross member can also be disassembled.
  • If crossbeams of different lengths are provided as the support unit, the device can be made more flexible, since there are no limits to the use of the device from very small dents (short crossbeams) to very large dents (long crossbeams).
  • If a whole device set is available with differently designed modules, such as work unit, support unit, support device, the device can be used on virtually any Need to be adjusted. For larger spans, the appropriate type of support devices can be selected for more stable support, more than two support elements can be operatively connected to the spars, support devices with one foot and those with multiple feet can be provided. Fixing elements can be selected that define a larger distance between the bars. The bars can be selected from a set of bars of different lengths and heights, although the bars do not have to be the same height over their entire length. In order to maintain the required bending stiffness of the bars, different materials can be used for the bars of different lengths. The bending stiffness in the case of very long bars can also be achieved above all by increasing the height of the bars.
  • The support devices are arbitrary in their angular position for optimal support on the surface, e.g. adjustable via a ball joint or other comparable constructions. Its height adjustability also contributes to a more stable and flexible support by the support devices.
  • Various known working units, i.e. those with an integrated welding tip, but also those which are used with working units which cooperate with work elements fixed on the sheet.
  • Further preferred embodiments of the work unit as well as the device and the device set are defined in the dependent claims.
  • The invention is explained in more detail below by way of example using various embodiments. The same elements are identified with the same reference symbols in the figures. The figures show purely schematically:
  • Fig. 1
    a first embodiment of the inventive device for bulging dented sheets in side view;
    Fig. 2
    the embodiment of Figure 1 in a view from above.
    Fig. 3
    the embodiment of Figures 1 and 2 of the inventive device in a perspective view.
    Fig. 4
    in section along line EE in Figure 1, a working unit according to the invention of the inventive device;
    Fig. 5
    a detail of the work unit of Figure 4 in perspective;
    Fig. 6a
    a second embodiment of the device according to the invention in perspective view;
    Fig. 6b
    the structure of the working unit 42 used in FIG. 6a; and
    Fig. 6c
    a further embodiment of the working unit 42 shown in FIG. 6b.
  • A First Embodiment The device 10 according to the invention for bulging dented sheet metal parts is shown in FIGS. 1 to 3. It comprises a support structure 12, which essentially comprises a support unit 14 and in this example two support devices 16. In this example, the carrying unit 14 comprises a crossbeam 18. The crossbeam 18 comprises two spars 20 which are arranged in parallel and at a distance from one another and have an essentially rectangular cross section. On their sides facing away from one another, the two spars each have chamfered edges 32.
  • In this example, the support device 16 comprises an inverted U-shaped support element 22, on the free ends of which feet 24 are arranged. The feet 24 are designed in the form of square plates and are provided on their side facing away from the cross member 18 with a rubber layer which on the one hand prevents the device 10 from slipping away and on the other hand protects the sheet metal part from scratches or other negative effects caused by the device 10 being put on. Of course, other materials with a corresponding protective effect and a suitable coefficient of friction can be used instead of rubber.
  • The plate-shaped feet 24 are articulated via a joint unit 26 in two mutually perpendicular axes y and z to the free ends of the U-shaped support element 22. Instead of the joint unit 26 with the two pivot axes, other joint shapes such as a ball joint, saddle joint or other suitable joint constructions are also conceivable. In this case, joint units 26 are preferred which ensure a high degree of freedom, since it can be ensured in this way that unevenness in the edge region of the dent or even desired sheet metal curvatures can be compensated for by the support device.
  • The two free ends of the U-shaped support element 22 are connected to one another by a crossbar. On this crossbar of the support element 22, a main support 28 is arranged, which extends away from the feet 24. In this example, the main support 28 has a circular cross section and is connected at its end opposite the support element 22 to a first plate 34 of a fixing element 30. The main support 28 can be rotated in this first plate 34 and can be locked in the desired position (not shown in detail).
  • In the example shown here, the fixing element 30 comprises a first plate 34 connected to the main support 28 and a second plate 36 arranged vis-a-vis. The plates 34, 36 each have two parallel grooves 37 on their one facing side, which are opposite to the ones Spars 20 are formed. This means that the grooves 37 also have inclined surfaces which interact with the inclined surfaces 323 of the chamfered outer edges of the spars 20. The plates 34, 36 can therefore be placed on the spars 20 from exactly one of the opposite sides. The plates 34, 36 laterally overlap the bars 20 in the area of their chamfered outer edges. Through openings in the plates 34, 36, which can be brought into register with one another, serve to receive threaded bolts 38. The threaded bolts 38 can be fixed with the aid of wing nuts 40. By tightening the wing nuts, the oblique surfaces of the grooves 37 and the oblique surfaces 32 of the spars 20 are pressed against one another and the spars are pressed against one another, which stabilizes the spars against torsion and tilting. The fixing element 30 thus simultaneously acts as a stabilizing element. The In this way, plates 34, 36 are defined in their position relative to one another and at the same time define the distance between the spars 20 relative to one another via the distance between their parallel grooves 37. Thus, no separate spacers between the bars 20 are necessary in this embodiment. If the wing nuts 40 are loosened somewhat, the fixing elements 30 can be easily moved along the cross member 18 formed from the bars 20. By tightening the wing nuts 40, they can be fixed again at any position. Since the spars 20 are not firmly connected to one another by spacers in the example shown here, a plurality of fixing elements 30 with supporting devices 16 can be very easily attached to the cross member 18 if this is necessary for reasons of stability. Of course, separate stabilizing elements 30 "can also be fixed at any position between the spars to increase the buckling load that can be absorbed by the spars. These stabilizing elements can be special modules, for example with a solid core between the spars, or simple fixing elements already described.
  • To remove a bulge from a sheet metal part, a first embodiment of a working unit 42 according to the invention is supported on the carrying unit 14 of the device 10. The work unit comprises a spindle 44 with an external thread 46. FIGS. 4 and 5 show this embodiment of the work unit 42 according to the invention in detail. The spindle 44 is screwed with its external thread 46 into an internal thread 48 of an abutment 50. The abutment 50 is rotatably supported on a support ring 54 using a bearing 52, for example a ball or slide bearing. The support ring 54 is connected in a rotationally fixed manner to a fixing element 30, as described above for the support devices 16. The second plate 36 of the fixing element 30 ', the bearing 52 and the support ring 54 each have a continuous opening through which the spindle is passed with play. The entire working unit 42 is movably supported along the cross member 18 via this fixing element 30 '. As shown in FIG. 4, the support ring 54 can also be formed in one piece with the second plate 36 of the fixing element 30 ', which allows easier assembly. In the example shown here, the thread of the interlocking threads 46, 48 is designed such that they cooperate in a self-locking manner. This means that no separate locking device is required.
  • The support ring 54 has a through opening 56 in its wall for receiving a blocking element 58. The spindle 44 is provided on its circumference with a continuous longitudinal groove 62 which runs parallel to its longitudinal axis 60 and into which the blocking element 58 engages. As a result, the spindle 44 is prevented from rotating about its longitudinal axis 60. In the embodiment shown here, the through opening 56 is provided with a thread and a suitable screw is provided as the blocking element 58. Any other reasonable construction is also conceivable, e.g. a threadless opening 56 for receiving a blocking pin, the blocking pin e.g. is secured by a split pin. At its free end, the spindle 44 has a connecting device, e.g. in the form of a bayonet catch or a thread (not explicitly shown). With the aid of this connecting device, coupling elements 64 of various designs can be connected to the spindle 44. The coupling element 64, for example a hook, an eyelet or a chuck which is customary in a tool, is intended to establish a secure connection with the working element (s) (not shown) attached to the sheet metal part before the device 10 is used. Instead of via a connecting device, the coupling element 64 can of course also be fixedly connected to the spindle 44 or can be formed in one piece with it. In principle, the structure looks very similar when the spindle 44 is rotatably supported and the abutment is fixed against rotation. The connecting device for the coupling element 64 or the coupling element 64 would then have to be designed such that the working elements are non-rotatable with respect to the rotating spindle.
  • In the embodiment shown, to pull out a dent on the rotatably mounted abutment 50 is rotated. For this purpose, the abutment 50 has a coupling device 66 in the region of its free end. In general, this coupling device 66 is designed in such a way that aids for manual operation, for example a ratchet or the like, can be connected to the abutment 50 or the connection for motor operation, for example using a drill, is also possible. If the second threaded element 50 is rotated, the first threaded element 44, not held by the blocking element 58, also rotates, but moves along its longitudinal axis 60, depending according to the direction of rotation in one or the other direction, thus introducing shear or tensile forces via the coupled working element (s) into the sheet.
  • The device has a modular structure so that it can be adapted very flexibly to the respective needs. This is possible not only by simply fixing and moving various types of support devices 16 on the cross member 18, but also by providing different threaded spindles 44, 50 with different pitches and different overall lengths for different material properties and characteristics of the bulge in the sheet metal parts. Crossbeams 18 of different lengths are provided for bumps of different sizes, long crossbeams 18 for weight reduction instead of cast iron or steel, e.g. made of aluminum, fiber-reinforced plastic or extruded carbon fiber profiles.
  • For smaller dents, it makes sense to use a cross member 18 'of short length, as is shown, for example, in FIG. 6. As can be seen from this illustration, the cross member 18 'can also consist of a rectangular hollow profile instead of two bars, the fixing elements 30 "being movably arranged in the hollow profile body 31, the fixing screws 70, 70' of which are guided through elongated holes 72 in the side walls of the hollow profile With the help of the fixing elements 30 ″ movable in the hollow profile, two support devices 16 are positioned so that they can be positioned along the cross member 18 ′. A working unit 42 'is supported between the support devices 16 on the cross member 18'. Each of the two support devices 16 has a support element 22 in the form of a main support with a foot 24 '. This foot 24 'is in the form of a plate. Each foot 24 'is rotatably supported by the support element 22 and can be locked in the desired position. In the example shown here, the feet are not articulated to the support elements. This can be useful with certain materials of the sheet metal part to be dented, because the bending moment acting on the cross member 18, 18 'during the application of the tensile force causes the feet 24, 24' to be pressed outwards away from the working unit 42, 42 '. If they are rigidly connected to the cross member 18, 18 'and are placed non-slip on the bleaching part, this leads to bulging an expansion of the sheet metal part in the area between the feet 24, 24 ', which supports the bulging.
  • In order to obtain a higher flexibility or a better adjustment of the device to the individual shape of the bumps, it makes sense to modify the square-shaped plates of the feet 24. For this purpose, a segment 25 in the form of a segment of a circle is provided on at least one side of each footplate 24 '. The radii of the circular segments of two foot plates 24 'intended for common use are preferably identical. In this way, the recesses 25 in the foot plates 24 'can e.g. describe bumps caused by hailstones very well and better results can be obtained when pulling out the bumps. Because the support devices 16 can be moved with the feet 24 'along the support unit 14 and thus flexibly adjustable in their distance from the work unit 42 and to the other support device 16, not only the edges of dents and bumps with essentially circular boundaries but also those Edges of n and or non-centric bumps can be stabilized by placing such recessed feet 24. If circular segment-like recesses 25 are provided on several sides of the foot plates, as shown in FIG. 6 a, the radii of the recesses 25 expediently differ on the different sides of a foot plate 24 ', but are identical to those of the associated second foot plate 24'. With such foot plates 24 ', it is possible to optimally describe the edges of bumps of different sizes by simply turning the foot plates and to achieve very good bulge results. The entire device, whether with a cross member 18, 18 'consisting of bars 20 or a hollow profile, can be used very flexibly and with high quality through the use of such foot plates 24'.
  • In contrast to the work unit described in FIGS. 1 to 5, the work unit 42 'shown in FIGS. 6 a and 6b is a work unit 42' with an integrated welding tip 74. The welding tip 74 is on in this example attached a free end of a tension element 75. The pulling element 75 is slidably supported in the cross member 18 'designed as a hollow profile with the aid of a sliding sleeve 76. At its the At the end opposite the welding tip 74, the pulling element 75 has a connection unit 78 for connecting a power cable 80 for supplying the welding current. In the embodiment of the device 10 'for bulging sheet metal parts shown in FIG. 6a, the tension element 75 of the working unit 42 is connected to a lever mechanism 82 for introducing the tensile force. In this example, the one lever arm 84 is connected in one piece to the cross member 18 ′, so that a T-member results. The lever arm 84 could, of course, also be formed separately and attached to the cross member 18 ', for example with the aid of screws. A second lever arm 86 of the lever mechanism 82 is articulated on the first lever arm 84. To transmit the tensile force to the working unit 42 ', the second lever arm 86 is connected in an articulated manner to the pulling element 75 of the working unit 42' via an articulated body 90. Between the joint body 90 and the sliding sleeve 76, the tension element 75 is provided enveloping a spiral spring as a counterforce for the lever mechanism, but this is not explicitly shown here for the sake of clarity. The joint body 90 and the sliding sleeve 76 are electrically insulating in this example, so that the working unit 42 ′ is electrically insulated from the supporting structure 12 of the device 10. In this way, it is possible to use the feet 24 ′ as counter electrodes for the welding tip 74. For this purpose, the feet 24 ′ must be connected to the sheet metal and the supporting structure 42 in an electrically conductive manner. With the feet 24 'as the counter electrode, a counter electrode which is otherwise guided separately from the welding device to the object to be dented can be saved. If the feet 24 'are not required as a counterelectrode, the feet 24' can also be electrically insulated, for example by a layer of paint on the sheet or by a rubber coating on the feet 24 ', on the bleaching part and when assembling work unit 42' and support structure 12 are not taken into account for an electrical separation of the components 42 ', 12.
  • The working unit 42 ′ shown here with an integrated welding tip 74 can be used in many different ways. Thus, not only can it be used in the embodiment of the device 10 ′ with a lever mechanism 82 shown in FIG. 6, but it can also be adapted in combination with a correspondingly designed threaded spindle 44, 50 for an embodiment of the device 10 without a lever mechanism, as shown in FIG 1 to 5 is shown. As indicated by FIG. 6b, the working unit 42 'can also be used as a hand-held device without a supporting structure 12, without being supported on the sheet metal part. For this purpose, the connection unit 78 for the power cable 80 is conveniently arranged as a T-handle on the tension element 75. As shown in FIG. 6c, the working unit 42 'can also be upgraded with a hammer 78 for manual use.
  • The embodiments of the device 10, 10 'and the working unit 42, 42' shown in the figures can be modified: if, for example, the cross member 18 consists of two bars 20, these can have a cross-section other than a rectangular one. For example, they can be square, polygonal, circular or oval in their cross section. However, if the ratio of material volume and thus weight to stability, for example against tilting or torsion, is considered, the spars 20 with a rectangular cross section and chamfered outer edges have proven to be very favorable. Instead of the described foot plates 24, 24 'with a rubber coating, the support devices can also be provided with smooth or profiled surfaces, depending on the sheet metal properties, or suction cups can be provided as feet. But the support device 16 can also be designed in a wide variety of ways. Instead of a main support with a U-shaped support element 22, as described in FIGS. 1 to 5, a main support 28 can be provided with a support element 22, which ends, for example, in three or four feet 24. The central main support can also be omitted and the feet 24, 24 'can be connected directly to the fixing element 30 by means of their support elements 22. The feet 24, 24 'can also be arranged on crossbars (not shown) connected to the fixing element 30 perpendicular to the crossmember 18, 18'. This is done in such a way that the feet 24, 24 'can be locked in the desired position so as to be movable transversely to the cross member 18, 18'. In this way, the support devices 16 as a whole can be moved along the cross member 18, 18 'and, in addition, the spacing of the feet 24, 24' from one another is adjustable. Instead of multi-part support element and main support can also be formed in one piece. Instead of self-locking threads 46, 48 in the embodiment of the working unit 42 described in FIGS. 1 to 5, it is also conceivable to use non-self-locking threads and instead a locking device provided. Instead of coupling an external motor to the working unit 42, it is also possible to design the coupling device of the working unit such that it can interact with a motor integrated in the device. The first plate 34 can also be formed in one piece with the main support and / or with the support element. Instead of the plates 34, 36 for the fixing element 30, 30 ', 30 ", it is conceivable to use double-T-shaped fixing bodies which grip the bars 20 with the arms of their T-shape.
  • It is clear to the person skilled in the art that the invention is not limited to the embodiments described and shown in the figures and in what form the various elements 42, 42 ', 18, 18', 16, 22, 28, 24, 24 'and individual components let these elements be combined sensibly.
  • As could be shown, the device 10, 10 'according to the invention with the working unit 42', 42 'according to the invention simplifies the handling of the device. Together with a connection for operation with an external motor, handling is further simplified, which is further increased with an integrated motor. It simplifies construction and lowers manufacturing costs. Due to a modular construction of the device 10, 10 ′ according to the invention with cross members 18 of different lengths, differently designed support devices 16, height-adjustable support elements 22 and different, adjustable feet 24, or bending-resistant support devices connected to the support unit, the device 10 , 10 'extremely flexible for denting a wide variety of dents.

Claims (12)

  1. Device for bulging dented sheet metal parts, with a working unit that can be supported on a supporting structure of the device, the working unit being connectable at its end facing the sheet metal part to a working element that can be temporarily connected to the bleaching part for bulging, characterized in that the Working unit has a spindle (44) which can be displaced along its longitudinal axis (60) and which is supported in an abutment (50) on the supporting structure (12), one of the components (44, 50) being non-rotatably and the other rotatably mounted.
  2. Device according to claim 1, characterized in that the rotatably mounted component (44, 50) is rotatably supported by means of a ball bearing.
  3. Device according to claim 1 or 2, characterized in that the spindle (44) is designed to be self-locking.
  4. Device according to one of claims 1 to 3, characterized in that for the connection of the working unit to the working element, the spindle (44) can be connected to its end facing the sheet metal part with different coupling elements (64) which are compatible with the one or more temporarily Sheet metal part fixed work element (s) can be selected and connected to the latter.
  5. Device according to one of claims 1 to 4, characterized in that the working unit has an integrated welding tip and a power connection or can be combined with a further working unit (42 ') designed as a welding device.
  6. Device according to one of claims 1 to 5, characterized in that the support structure (12) a support unit (14) and at least one support device (16) comprises, and the support device (16) and work unit (42) can be fixed at any position of the support unit (14).
  7. Apparatus according to claim 6, characterized in that the support unit (14) comprises a cross member (18) consisting of two bars (20) which are held at a defined distance from one another by means of fixing elements (30, 30 ', 30 ") which can be moved on them , wherein the fixing elements (30, 30 ', 30 ") preferably also serve for the movable positioning of other components, such as the working unit (42) and / or the support device (16).
  8. Apparatus according to claim 7, characterized in that the bars (20) on their sides facing away from one another have inclined surfaces (32) which are surrounded on the outside by the fixing elements (30, 30 ', 30 ") and by the interaction with the fixing elements ( 30, 30 ', 30 ") prevent the bars (20) from tilting under load.
  9. Device according to one of claims 6 to 8, characterized in that the support device (16) cooperates with the support unit (14) in a rigid manner and / or has feet (24 ') which are plate-shaped, a circular segment-like recess on at least one side of the plate (25) and are rotatably mounted about an axis perpendicular to the plate.
  10. Device set for denting dented sheet metal parts; including at least one work unit (42, 42 '); Cross members (18) of different lengths and associated fixing elements (30, 30 ', 30 ") and support devices (16) including various feet (24, 24').
  11. Device set according to claim 12, comprising various coupling elements (64) and / or additional working units (42) and / or at least one working unit (42 ') designed as a welding device and or a lever mechanism (82).
  12. Working unit for a device for bulging dented sheet metal parts, which can be supported on a supporting structure of the device, the working unit being connectable at its end facing the sheet metal part to a working element which can be temporarily connected to the bleaching part for bulging, characterized in that the working unit has a spindle (44) which can be displaced along its longitudinal axis (60) and which is supported in an abutment (50) on the supporting structure (12), one of the components (44, 50) being non-rotatably and the other being rotatably mounted.
EP04006194A 2003-03-17 2004-03-16 Device for removing dents from sheet metal parts Active EP1459814B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CH4252003 2003-03-17
CH4252003 2003-03-17

Publications (2)

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EP1459814A1 true EP1459814A1 (en) 2004-09-22
EP1459814B1 EP1459814B1 (en) 2006-09-27

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EP04006194A Active EP1459814B1 (en) 2003-03-17 2004-03-16 Device for removing dents from sheet metal parts

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EP (1) EP1459814B1 (en)
AT (1) AT340659T (en)
DE (1) DE502004001556D1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4050271A (en) * 1974-06-20 1977-09-27 Noel C. Jones & Associates, Inc. Apparatus for repairing indentions in a rigid skin
US4089201A (en) * 1976-05-27 1978-05-16 Constantine Raptis Silent dent puller
US4116035A (en) * 1977-09-08 1978-09-26 Frank Malarsky Dent puller
US4930335A (en) * 1989-07-03 1990-06-05 Kosei Ishihara Lever-type auto body dent puller
EP0856366A2 (en) * 1996-12-05 1998-08-05 MB Autoattrezzature S.r.l. Device for straightening dented vehicle body parts
EP1127631A2 (en) * 2000-02-24 2001-08-29 Adolf Würth GmbH & Co. KG Device for removing dents

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2855421B2 (en) * 1996-01-15 1999-02-10 光政 石原 Drawer for sheet metal
JP2000254727A (en) * 1999-03-09 2000-09-19 Eizo Nomura Method and device for repairing sheet metal of automobile

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4050271A (en) * 1974-06-20 1977-09-27 Noel C. Jones & Associates, Inc. Apparatus for repairing indentions in a rigid skin
US4089201A (en) * 1976-05-27 1978-05-16 Constantine Raptis Silent dent puller
US4116035A (en) * 1977-09-08 1978-09-26 Frank Malarsky Dent puller
US4930335A (en) * 1989-07-03 1990-06-05 Kosei Ishihara Lever-type auto body dent puller
EP0856366A2 (en) * 1996-12-05 1998-08-05 MB Autoattrezzature S.r.l. Device for straightening dented vehicle body parts
EP1127631A2 (en) * 2000-02-24 2001-08-29 Adolf Würth GmbH & Co. KG Device for removing dents

Also Published As

Publication number Publication date
AT340659T (en) 2006-10-15
DE502004001556D1 (en) 2006-11-09
EP1459814B1 (en) 2006-09-27

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