EP1409174A1

EP1409174A1 - Adhering anchor and device for deforming areas of a vehicle body

Info

Publication number: EP1409174A1
Application number: EP00987224A
Authority: EP
Inventors: Martin Strasser; Michael Gabriel
Original assignee: Mv Marketing und Vertriebs-Gmbh & Co KG Wielander and Schill; MV Marketing und Vertriebs GmbH and Co KG
Current assignee: Mv Marketing und Vertriebs-Gmbh & Co KG Wielander and Schill; MV Marketing und Vertriebs GmbH and Co KG
Priority date: 1999-11-09
Filing date: 2000-11-09
Publication date: 2004-04-21
Anticipated expiration: 2020-11-09
Also published as: US6964186B1; ATE324197T1; WO2001034316A1; AU2355101A; DE50012670D1; EP1409174B1; DE20022644U1; EP1409174B9

Abstract

The invention relates to a device for deformation, in particular for restoring deformed bodywork regions, having a pulling device to which an adhesive bolt can be fastened, the adhesive bolt being fastenable by adhesion to the bodywork region to be deformed.

Description

ADHESIVE BANK AND DEVICE FOR DEFORMING BODY AREAS

description

The invention relates to a device for deformation, in particular for the recovery of damaged ones

Body areas, which can be used advantageously for the needs of automotive bodywork.

Particularly in the area of vehicle body repair, the most effective and high-quality repair of body damage is of great importance in an increasingly difficult environment.

Various materials, such as aluminum, plastics and fiber-reinforced plastics, are increasingly being used in today's vehicles, which are difficult to process with conventional means during repair. In addition, sheets of different thicknesses are used, which means that the force to be applied for a reshaping is very different and certain manual processes, such as for example kicking back the dent with a hammer or pull hammer, are becoming increasingly difficult.

BESTΆTIGUNGSKOPIE According to current knowledge, the shape of the conventional so-called gentle repair is normally carried out with different straightening irons from below the sheet by pushing the sheet back.

Adhesive technology is also offered. This technique involves repairing large dents with a pull hammer. However, the adhesive plugs used are too large for the small hail dents and have therefore often been cut off to reduce their diameter. This method was used especially for sheet metal sections that are inaccessible from below or from the rear. This technique works with practice, but has serious shortcomings. Hitting with the pull hammer is too imprecise, which means that there is a risk of pulling with too little or too much force. The dent must therefore be worked on relatively frequently. This means that in many cases the dent overturned and then had to be struck back with the Teflon mortar, which generally required time-consuming subsequent grinding and polishing.

Furthermore, due to frequent tilting of the large pulling hammer, the adhesive plugs were so affected that they break off. Likewise, the case often occurs that in the case of pulling a hammer, already painted and filled cars lose part of the paint or the paint and filler is chipped off.

The present invention is intended to enable deformations, such as reshaping or dent repairs, without having to be painted and without Dismantling of the headliner or other attachments is necessary. Furthermore, the quickest possible and exact repair from the outside against the sheet should be supported with very little environmental pollution.

This object is already achieved in the most surprisingly simple way with a device having the features of claim 1. Compared to a reshaping by striking, a defined pull is made possible here, because instead of a striking device a pulling device is used, which enables a constantly controlled power transmission without significant force peaks and with an exact stroke. A pulling device is used for this, to which an adhesive bar can be attached, the adhesive bar being attached to the body region to be deformed by gluing.

It is of great advantage that the adhesive bank in its area facing the sheet metal can be made so small that even dents caused by hailstorms can be grasped in their depth and reshaped.

For this purpose, it is advantageous if the adhesive bank comprises a substantially frustoconical adhesive plug, which has a structured adhesive surface on the underside thereof, since the structured surface increases the effective area available for applying an adhesive and, as a result, a significantly higher tensile force can be absorbed and by the truncated cone shape provides very high stability.

It is also advantageous here if the structured adhesive surface has radially extending ribs or the structured adhesive surface has a corrugation. If the underside of the adhesive plug has a curvature receding towards the outside in the pulling direction, the tool can also be used on rounded parts of the body or, in the event of damage obliquely to the surface, an oblique pull for optimal reshaping.

Depending on the damage, the underside of the adhesive plug is round, oval, square, square, rectangular, trapezoidal, polygonal or shaped by the user in any way to enable the best possible force to be applied to the damaged body area.

In an inexpensive, robust embodiment, an elongate counter-holder with a web is used for support against the body, which is made of plastic or metal and has a hole in the middle through which the threaded rod can be guided.

For better adaptation of the support of the tool, the counter holder has a through groove on two sides in order to enable a lateral displacement of one support plate, which is held in each case in a through groove.

To support angled pulling or pulling on rounded body areas, the support plates have articulated feet with integrated threaded rods.

A very safe and secure against slipping is possible if the support plates have a rubber pad on their underside and in the joint of the articulated foot are both pivotable and rotatable. This also greatly improves the handling of the device.

Alternatively, the support plates have a suction base or a magnetic base on their underside.

If the joint of the articulated foot comprises a ball head joint whose pivot point is in the vicinity of the contact surface of the support plates and preferably comprises a flattened ball head with a flattened ball head receptacle whose effective pivot point lies in the plane of the body region to be machined, oblique lateral pulling can take place without this there are significant forces trying to change the direction of pull.

There are great temporal advantages when using an adhesive bank with a device for applying and / or removing the adhesive on and / or from the body area to be processed. Such an adhesive bank can, for example, be a device for heating a

Include hot glue, for example with a sleeve with a through hole, in which lateral thrust elements are arranged in order to keep a hot glue cartridge longitudinally displaceable in the forward direction and blocking in the rearward direction.

A further time saving results from a device for cooling the hot glue, which preferably comprises a device for supplying a coolant, such as air or coolant.

An almost completely automated movement during the reshaping is made possible by a device for Triggering of the heating comprises in particular an electrical switch or a piezoelectric element which triggers an electronic circuit for controlling the heating from a certain pressure force.

Very high heating speeds are made possible by a device for detecting the temperature of the hot melt, which is assigned to an electrical control device for controlling the temperature of the hot melt adhesive.

A further shortening of the time sequence is made possible by a device for removing the heated hot glue.

The invention is explained in more detail below on the basis of preferred embodiments and with reference to the accompanying drawings. Show it:

1 shows a perspective view of a first embodiment according to the invention of a device for deforming body regions in an exploded view obliquely from the front, FIG. 2 shows a perspective view of the first inventive invention shown in FIG. 2

Embodiment in the assembled, ready-to-use position, FIG. 3 shows a perspective view of the first embodiment according to the invention shown in FIGS. 1 and 2 in the assembled, ready-to-use position obliquely from above, FIG. 4 shows a cross-sectional view of a gluer a device for supplying adhesive and an electrically controlled device for

Heating of the adhesive, FIG. 5 shows a cross-sectional view of a further developed adhesive agent compared to the one shown in FIG. 4 with a device for supplying coolant for cooling the hot-melt adhesive, FIG. 6 shows a cross-sectional view of an adhesive agent again shown in relation to FIGS. 4 and 5 further developed Klebankers with a

Device for removing the hot glue, Fig. 7 is a cross-sectional view of another

Embodiment of a sticking machine with a

Device for feeding a liquid, component adhesive,

Fig. 8 is a cross-sectional view of yet another embodiment of an adhesive with a

Device for supplying a liquid, multi-component adhesive.

The invention is described in more detail below, the figures not being drawn to scale for the purpose of better understanding.

A first embodiment of the device according to the invention, which is shown in an exploded view in FIG. 1, is described below.

The device designated as a whole by 1 comprises a pulling device 2, which is suitable for pulling a glue splitter 3 in the direction of arrow A, thus away from a body region 9 to be machined, and pulling it smoothly. A further automatic device for pulling the adhesive bank 3 is described, for example, in the European patent with the publication number EP 94 113 097.3, the content of which is also made the subject of the present application in its entirety. When using such a pulling device, instead of the threaded rod 4 of the adhesive bar 3, a rod with a bayonet or any other external design can be used to hold it in the pulling device.

Furthermore, the adhesive bank 3 is an independently manageable and tradable object with which many advantages of the invention can also be achieved with other pulling devices already on the market.

The adhesive bank 3 further comprises a substantially frustoconical adhesive plug 5, which has a structured adhesive surface on its underside 6, by means of which the available surface and tensile forces which can be effectively achieved thereby are increased.

In the embodiments of the adhesive banker 3 shown in FIGS. 4 to 6, the underside 6 has radially extending ribs 7, by means of which, for example, heated ones

Hot glue 8 can emerge from a heated, inner, hot zone and fine channels can be created between the underside 6 and the body panel 9, in which high adhesive forces can be achieved.

Furthermore, the adhesive plug 5 is threaded with a wing nut 12 through the threaded rod 4, which extends through an opening 10 which extends through a counter-holder 11 Direction and opposite to the direction of arrow A slidably.

The counter-holder 11 comprises a web 13 with two longitudinal grooves 14, 15, in which support plates 16, 17 are laterally displaceable and can be locked with wing nuts 18, 19. For this purpose, the support plates 16, 17 have corresponding threaded rods, which merge into joints 20, 21.

In a preferred embodiment, the joints 20, 21 are ball-and-socket joints and, as can be seen in the right joint 21 from FIG. 1, have a flattened ball head 22 and a flattened ball head receptacle 23, so that the effective pivot and pivot point of the ball head joint is approximately lies in the plane of the body region 9 to be machined.

A rubber pad is applied to the undersides 24, 25 of the support plates 16, 17 or, alternatively, suction feet or magnetic feet are interchangeably attached in order to always ensure a safe pulling process that is free of slipping.

This also enables a secure support on rounded body areas, in which the underside 6 of the adhesive bank 3 also does not have to run flat, but, depending on the embodiment, can have corresponding bends or roundings, in particular receding in the direction of pull.

Furthermore, in a further preferred embodiment, the adhesive plug 5 is produced from a plastic that can be processed by cutting, so that the underside 6 has any For example, it takes on round, oval, angular, quadrangular, rectangular, trapezoidal or polygonal shapes that have been optimally adapted to the respective damage by the user.

In the first embodiment according to the invention, repairs are generally carried out as follows.

The area to be processed is cleaned and a small, about hazelnut-sized plug of hot glue is applied.

The stopper is now preferably placed in the center of the dent, the approx. Hazelnut-sized adhesive being poured from the hot glue gun onto the coating. The wing nut with internal thread is now screwed on.

After the adhesive has cooled (after approx. 1 minute), the threaded rod and thus the indented sheet metal are pulled upwards by rotating the wing nut against the counterholder (corkscrew effect). Since this repair work is preferably carried out with a neon light that is placed so that the light strip in the dent reflects the bend of the dent, it can be observed very well how the deformation deforms due to the targeted rotations of the nut. In contrast to the pull hammer method in the invention, it can therefore always be observed exactly how the dent is deformed back and when this process has to end in order to prevent the sheet from being overstretched.

If the neon light stripe forms the usual straight line, the emdellung has disappeared and thus reached the destination. The dent extractor is removed by heating the plug with a hot air blower. The area can now be completely cleaned or, if necessary, also reworked.

This application option allows any number of threaded rods / adhesive plugs to be glued one after the other and processed with the same counterholder and wing nut.

These are inserted into the milling groove on both sides of the counter holder via the threaded rod and screwed together with wing nuts.

In the following, reference is made to FIGS. 4 to 6, FIG. 4 comprising an adhesive bank 3 with a device for applying the adhesive 26, this adhesive preferably being a hot-melt adhesive and preferably being supplied as a hot-melt cartridge 26 which is contained in an upper sleeve 27 a plate spring 28 is longitudinally displaceable in the direction of arrow B, but is held in the opposite direction to the direction of arrow B.

If the sleeve 27 is moved towards the sheet B in the direction of arrow B when the adhesive bank 3 is placed on the sheet 9 to be processed, the front part of the hot-melt cartridge 26 comes into contact with the sheet 9 and displaces the plate spring against the direction of arrow B. and triggers an electrical switch 29 or exerts a compressive force on a piezo element 30, which is detected by means of supply lines 31 by an electronic circuit, not shown in the figures. The electrical circuit controls a device for heating the hot glue 32, which in a further preferred embodiment comprises a thermoelectric element 33 with which a very rapid heating process can be carried out in a controlled manner.

The heated hot glue 8 then emerges laterally when the upper sleeve 27 is pressed in the direction of arrow B between the ribs 7 with displacement of the sleeve 27 relative to the lower sleeve 34, so that an exactly defined adhesive application takes place.

The amount of adhesive to be applied can be adjusted by adjusting the displacement path of the sleeve 27 by means of stops, not shown in the figures.

After heating, metallic cooling ribs 35 arranged on the outside of the adhesive bank 3, which are in very good thermal contact with the ribs 7, ensure rapid cooling and rapid hardening of the hot glue. This cooling can be indicated to the user by optical or acoustic signals from the electronic device while measuring the temperature of the thermocouple 33, so that a safe pulling operation can always be achieved.

The subsequently initiated pulling process pulls the sleeve 27 relative to the sleeve 34 back under the additional force of a compression spring 36 into an upper end stop, not shown in the figures, which then causes the tensile forces to be introduced into the body region 9. A withdrawal of the hot-melt adhesive cartridge 26 is prevented by a plate spring 37, which, like the plate spring 28, can also be slotted, in the lower sleeve 34.

After the pulling process until the desired reshaping or up to a desired, defined overstretching, the hot glue can again be heated with the device 32 and the glue splitter 3 can be removed from the sheet 9 in a simple manner.

If, for example, the

Manufacturer referred to as Airpuller device described in EP 94 113 097.3 used, so emerging air from the pneumatic system can be used to achieve accelerated cooling. When using the Airpuller, its advanced electronic

Control device take over all the time control processes, such as applying adhesive by moving the adhesive bank 3 forward, its heating and cooling, the subsequent pulling and reheating to loosen the adhesive bank automatically or set by the user with appropriate time parameters.

When using the airpuller, instead of loosening the adhesive by heating, the adhesive bank 3 can also be jerked by means of which this adhesive bank is separated from the sheet metal region 9.

However, even without using the air puller, simply blowing the cooling fin 35 on with a pneumatic nozzle leads to rapid cooling.

Without the use of such pneumatic cooling options, either that is available in the workshop area liquid coolant is applied to the cooling fins 35 or a separate electrical cooling device, for example shown in FIG. 5, in the form of a ventilation blower 38 is used.

This blower 38 is also regulated by the electronic control device and can be actuated as a function of the temperature detected by the thermoelectric element 33 or by a time switch device.

Furthermore, an embodiment shown in FIG. 6 comprises an elastic spatula 39 which can be pivoted in the direction of arrow C and with which the still hot adhesive can be removed from the sheet 9 in a simple manner after detaching the adhesive agent 3. It is within the scope of the invention to also design this spatula 39 to be heatable.

Two further embodiments of the adhesive bank 3 according to the invention are shown in FIGS. 7 and 8, in which adhesive cartridges with fast-curing adhesives are used instead of the hot adhesive.

In the embodiment shown in FIG. 7, an adhesive cartridge 40 with a fast-curing, liquid one-component adhesive, for example a superglue based on acrylate or methyl acrylate, is used.

The cartridge 40 comprises an adhesive chamber 41, in which a stamp 42 is held so as to be longitudinally displaceable in the direction of the arrow B. With each movement of the upper sleeve 27, an upper cap 43 connected to the punch 42 is shifted downward by a defined amount and thereby presses the stamp 42 into the adhesive chamber 41, as a result of which a defined portion of adhesive is dispensed from the lower end thereof through a nozzle 50, which occurs between the underside 6 of the adhesive bank 3 and the surface of the sheet 9 and thereby produces a predefined adhesive surface.

Instead of the cartridge 40, a commercially available syringe filled with adhesive can also be used, which is first inserted into the adhesive bank 3 as shown in FIG. 7 and over which the cap 3 is subsequently pushed. The cap 3 is moved in essentially the same manner as that described for the hot-melt cartridge.

After the adhesive has hardened, which takes a few seconds, the pulling process can be carried out.

At the end of the pulling process, a jerky rotation of the adhesive bank 3 by means of the air puller can cause it to shear and the device according to the invention is ready for use again.

In a further embodiment shown in FIG. 8, the adhesive cartridge comprises several, preferably two

Adhesive chambers 44, 45, each having a stamp 46, 47, which is connected to a cap 48. In this embodiment, if the cap 48 with the punches 46, 47 is moved in the direction of the arrow B, the various components, preferably hardener and resin, become one

Multicomponent adhesive is mixed together by the nozzles 48, 49 which are located close to one another, and a rapid curing process of the adhesive is initiated. In this embodiment too, the adhesive bank 3 can be released by shearing off.

The invention is not restricted to the above-described embodiments and in particular is not restricted to being used only in the case of lacquered metal sheets. Rather, it is also within their framework to deform bare metal sheets or areas primed or provided with filler.

Claims

claims

1. A device for deformation, in particular for reshaping deformed body areas (9), a pulling device (11) to which an adhesive bar (3) can be fastened, the adhesive bar (3) being fastened to the body area (9) to be deformed by gluing ,

2. Device according to claim 1, characterized in that the adhesive bank (3) comprises a substantially truncated cone-shaped adhesive plug (5) which has a structured adhesive surface on its underside.

3. Apparatus according to claim 1 or 2, characterized in that the structured adhesive surface (6) increases the effective area available for an adhesive application.

4. Apparatus according to claim 1, 2 or 3, characterized in that the structured adhesive surface (6) has radially extending ribs (7).

5. The device according to claim 1, 2 or 3, characterized in that the structured adhesive surface (6) has a corrugation.

6. Device according to one of claims 2 to 5, characterized in that the adhesive plug (5) is connected to a threaded rod (4) which is a wing nut (12) is assigned.

7. Device according to one of claims 2 to 6, characterized in that the underside (6) of the adhesive plug (5) has a curvature receding towards the outside h m pulling direction.

8. Device according to one of the preceding claims, characterized in that the underside (6) of the adhesive plug (5) is round, oval, angular, square, rectangular, trapezoidal, polygonal or arbitrarily shaped by the user.

9. Device according to one of the preceding claims, further comprising an elongate counter-holder (11) with a web (13) which consists of plastic or metal and in the middle has a bore (10) through which the threaded rod (4) is feasible.

10. The device according to claim 9, characterized in that the counter-holder on two sides each have a through groove (14, 15) in order to enable a lateral displacement of a respective support plate (16, 17), each in a through groove (14, 15th ) is held.

11. The device according to claim 10, characterized in that the support plates (16, 17) have articulated feet (20, 21) with integrated threaded rods.

12. The apparatus of claim 10 or 11, characterized in that the support plates (16, 17) have a rubber pad on the underside and in the joint (20, 21) of the articulated foot are both pivotable and rotatable.

13. The apparatus according to claim 10 or 11, characterized in that the support plates (16, 17) have a squeegee on the underside.

14. The apparatus according to claim 10 or 11, characterized in that the support plates (16, 17) have a magnetic base on the underside.

15. The device according to one of claims 11 to 14, characterized in that the joint (20, 21) of the

Articulated foot comprises a ball head joint (22, 23), the pivot point of which is close to the contact surface of the support plates (16, 17) and preferably comprises a flattened ball head with a flattened ball head receptacle, the effective pivot point of which lies in the plane of the body region (9) to be machined.

16. Device according to one of the preceding claims, further characterized by an adhesive bank (3) with a device for applying and / or detaching the adhesive to and / or from the body region to be processed.

17. adhesive banker (3) for a device according to one of the preceding claims, characterized by a device for applying the adhesive to the body area to be processed.

18. adhesive banker according to claim 17, characterized by a device (32) for heating a hot glue.

19. adhesive banker according to claim 17 or 18, further comprising a sleeve (27, 34) with a through hole, in which lateral thrust elements (28, 37) are arranged to a To keep the hot-melt cartridge in the forward direction (B) on the body area to be machined (9) to be longitudinally displaceable and in the reverse direction blocking.

20. adhesive banker according to claim 17, 18 or 19, characterized by a device (35, 38) for cooling the hot glue (8).

21. The adhesive bank according to claim 20, further characterized by a device (38) for supplying a coolant.

22. adhesive bank according to claim 20 or 21, comprising radially on the outside of the adhesive bank (3) arranged metallic cooling fins

(35), a device (38) for the supply of air and / or a cooling liquid.

23. adhesive banker according to claim 22, characterized in that the cooling fins (35) with ribs (7) on the underside (6) of the adhesive banker (3) are in thermal connection.

24. adhesive banker according to one of claims from 18 to 23, further characterized by a device for triggering the heating comprising in particular an electrical switch

(29) or a piezoelectric element (30) which triggers an electronic circuit for controlling the heating from a certain pressure force.

25. adhesive banker according to claim 24, further characterized by a device (33) for detecting the temperature of the hot melt adhesive (8), which is assigned to an electrical control device for controlling the temperature of the adhesive banker (3).

26. The adhesive banker according to any one of claims 17 to 26, further comprising a device (39) for removing the heated hot glue.

27. adhesive banker according to claim 27, characterized in that the device (39) for removing the heated hot glue comprises a pivotable, preferably heated spatula (39).

28. adhesive banker according to claim 17, characterized by an adhesive cartridge which emits a defined amount of adhesive when the adhesive banker (3) is placed on the body region (9) to be processed.

29. adhesive banker according to claim 29, characterized in that the adhesive cartridge comprises a plurality of adhesive chambers with a plurality of components of a multi-component adhesive.

SPARE BLADE (RULE 26)