EP1858658B1 - Device for chipless reforming vehicle rims for car, motor lorry, or motorcycle - Google Patents

Abstract

The device (1) is assembled of two housings (4) positioned on top of a frame made of two H-profiles (2, 3) and containing the drive units. A control box with several levers (7, 8, 9, 10) is located at the front. The wheel rim is accommodated in the space between the housings (4) and fixed with bolts guided through the appropriate bores as at the vehicle. A shaping element (59) attached to a telescopically arranged hydraulically or pneumatically operated arm performs a pushing or pulling motion at the wheel rim as required.

Description

The invention relates to a device for straightening wheels for vehicles such as car, truck and motorcycle rims.

Aligning aluminum alloy rims is generally problematic. Not only that it comes by such deformations to unbalance and an unsafe seat of the tires on the rims, but are associated with dangerous driving characteristics of the vehicle in question, for. B. by air loss. Transitions between the star (spoke) and the rim body can lead to dangerous voltage accumulations, which can lead to breakage.

The hitherto known devices and methods allow only insufficient straightening of rims, z. As aluminum rims for cars. In addition, there is also a problem for the insurance. More and more low-profile tires are used on cars on aluminum rims. Already when driving up onto a sidewalk it can come to such a Niederquerschnittsreifen permanent deformation on the rims, because the air-filled space is so small dimensioned by the low radial tire height that hardly any spring travel is available. That is why the masses often hit the rim and deform it permanently.

But even in accidents involving property damage there are permanent, often serious deformations on rims.

If such damage due to improper driving, z. For example, when driving through potholes or the like, in particular with Niederquerschnittsreifen on, insurance companies often have to pay the amount for all four rims, although for example only one rim has been damaged, because in many cases damaged rims of a certain type not or only difficult new obtain. For the insurance companies, it would then be more advantageous to have only the damaged rim repaired in order not to have to enter the full liability amount. But even if only one or more rims have been damaged, it is cheaper for the insurance companies, only the repair for the rims instead of financing brand new rims, provided the repaired rims enable safe driving.

The DD 240 152 A1 relates to a method and apparatus for regenerating alloy wheels, in particular for two-wheeled vehicles, in order to renew them by straightening and deforming operations so that they can be used for further consumer use. In this case, the deformed portions of the rim are prepared by compressing a mold segment lower part and a mold segment upper part by re-deformation and brought about to eliminate the spring tension by a rolling process in a split shell mold by means of a counter-mold leveling the geometric shape. In this process, the cold workability of the material is exploited to obtain a reusable rim in several steps. In a manufactured according to an original rim two-piece mold, consisting of the mold segment upper part and the mold segment lower part, which are preferably made of cast steel, the deformed position of the rim is inserted and pressed together under pressure. The process should be repeated as often as there are deformations. Apart from the rest of the spring tension in the material, the concentricity of the prepared rim should be achieved after the pressing process has been completed. In a further step, the prepared rim is inserted with the profile of the inner diameter in a two-part dimensionally accurate and contoured shape. By pressing in the axial direction, the remaining spring tension overcome the prepared rim and fixes the accuracy of form and the side and rash. In order to exclude a springback and to equalize the rim in the required geometric shape, the counter-roll is to be delivered in the open tire-side part of the rim and the mold shell are rotated by the drive bearing in rotation. With the pressurized admission of the counter-roll in the direction of the rim bed, cold rolling of the rim profile takes place in the roller table. This should solidify the surface and restore the geometric shape of the rim. Deformations on the rim flange and at the star of, for example, car and truck as well as modern motorcycle rims can not be put back into a safe ready-to-use state.

From the US 5,499,524 The closest prior art is a device for cutting rims for vehicles such as car, truck and motorcycle rims previously known, with a receptacle at which the deformed rim with respect to the bolt circle of holes and / or the wheel pad , with which the rim is normally attached to the vehicle in question, axially and radially fixable, with at least one deforming body attached to an arm, which acts on the inside and / or outside at the periphery of the rim by compressive stress on the deformed region of the rim and this Area deformed back within prescribed tolerances, wherein the arm pivotable about an acute angle and / or in at least one plane parallel to the axis of rotation of the rim plane displaceable and steplessly telescopically axially adjustable by a motor and in the respective desired position is also locked, which are measured in the device rounding and planning accuracy of the rims within prescribed tolerances. Deformations inside the star can not be eliminated with this device. In addition, it is not possible to determine the run-flat properties of the rim clamped in the device and to restore these run-out properties within the prescribed tolerances, including the run-flat characteristics at the star. Tensile stresses on areas of the rim can also not be performed by this device, but only compressive stresses, so that the application is limited, quite apart from the fact that the exercise of compressive stresses on the deformed areas in the cold state it to strain hardening and thus increased notch impact sensitivity of the pushed out areas.

Out Patent Abstracts of Japan, vol. 2000, no. 22, 09 March 2001 , and JP 2001 121212 A is a device of similar type for the non-cutting straightening of aluminum rims for vehicles previously known. Even with this device, no runout properties can be ensured because during the pressing on deformed areas of the rim, the runout properties can not be measured and restored by straightening the rim. Therefore, even with this device no concentricity within achieve prescribed tolerances, but only a point-wise pressing on deformed areas of the rim. Even the star of the rim after a deformation, especially after a lateral tilting away, not again within prescribed tolerances and thereby put into existence, since the rim rests rigidly on a worktable and therefore immobile.

The EP 1 398 093 A1 also shows a device for repairing rims. The rim to be straightened is taken up by a relatively thin shaft, which can not absorb the very high forces that occur when straightening automobile rims, especially car or truck rims, but is bent. For motorcycle rims, this device may be suitable to a limited extent, deformations on the star of a car rim or truck rim can not be addressed with this device within prescribed tolerances while ensuring plan and concentricity properties.

The EP 1 116 529 A2 allows the application of tensile and compression properties on the edge of a tightly clamped rim. Concentricity and run-flat properties can not be restored within prescribed tolerances. Even deformations on the star of the rim can not be eliminated. However, it is previously known from this device to heat the rim within the deformed region in order to make the structure softer for the purpose of forming.

The US 5,634,361 also describes a device for straightening rims. Since the rim must be clamped on the edge area for the purpose of exerting compressive stress, deformations on the star can not be eliminated as well. In addition to be achieved by a cone in the region of the central central opening of the rim at a relatively small area clamping the rim. However, the high forces that occur here can not be absorbed to the required extent at all, so that the danger exists that even when pressing on the deformed edge region, the rim breaks at this point.

The invention has for its object to design a device for chipless straightening of rims for vehicles such as car, truck and motorcycle rims such that even problematic deformations, for example, the star and aluminum rims, while ensuring plan and concentricity properties reliable and relatively quickly and thus economically can be eliminated again.

This object is achieved by the reproduced in claim 1 features.

The inventive device can be very robust and compact, similar to a lathe, build, so that even large and strong or problematic deformed rims can be directed to her spanlos. The rims are preferably motor-driven about a horizontal axis of rotation, so that in one and the same device initially the roundness and plan accuracy - within predetermined tolerance values - can be accurately measured, both scanning and non-contact and documented. Furthermore, it is a novelty that during the entire recovery process can always be measured simultaneously and completely and not only partially the damage is in the field of vision. Corresponding test reports from TÜV Automotive South in Munich, the official Radprüfstelle of the Federal Motor Transport Authority, are available.

In contrast, according to the state of the art, only an approximation of the concentricity is achieved, whereupon subsequently a machining takes place in the region of the wheel surface or also in the area of the tire bearing surfaces. This is unacceptable because by cutting the walls of the rim in question can be reduced dangerously. For rims with so-called surface hardness layers, such as anodized or electroplated layers, the load bearing capacity of the rim would be irreparably damaged even with minimal over-tightening.

In contrast, in the invention, an exact concentricity through non-cutting machining, ie without material removal.

The axial and radial fixation of the rim also makes it possible to produce a reference plane which corresponds to the normal concentricity in practical operation of the wheel with the rim itself. For this purpose, it is preferable to select the receiving bores and the center center bore as well as the wheel connection surface of the middle mounting flange of the rim. Through the holes of the middle flange grab in practical operation through bolts through which the rim and thus the wheel is to be attached to the vehicle in question. From this reference surface, z. B. of the bolt circle and / or the wheel pad abnormal, so outside the tolerance values lying values or different values are included in the straightening of the rim within the device so that it can be deformed back to its original shape. It can also be difficult, unwanted deformations on Felgenaussenteil or on the so-called rim flange or in the transition region to the star (spoke) deform back so that the rim not only has a mint appearance, but also complies with the tolerances that must have a mint rim of this type. Most rims are deformed by driving across transverse to the direction milling edges, for example, on highway construction sites or by driving through potholes and not as formerly by the too fast start up on curbs.

Ninety percent (90%) of the rim-damaged rims nowadays not only carry bumps and dents on the rim flanges, but are also warped together with the rim rims. This is done by changing the geometric configuration of the component. Due to the build-up of ever larger brake systems, the rim support star (which in earlier design stood approximately midway between the front and rear rim flange, "stiffening like a T"), moved ever further to the front. This results in a lever effect, which no longer causes a uniform load on both rim shoulders when driving over, for example, potholes (stiffening now as in an L).

The motor-driven deformation body can in this case inside and / or outside or axially on the periphery, z. B. on the rim Hom, be introduced to exert the appropriate compressive or tensile stresses on the deformed rim part, which is required to return the rim to its original, within predetermined tolerance levels form back. Of the Deformation body can in this case by a suitable linear motor, for. B. by an alternately on both sides with pressure medium pressure - hydraulically or pneumatically - to be acted upon piston-cylinder unit to be driven so that the correspondingly high forces can be applied to the deformed rim part to bring this back to its original, new shape. The axial and radial fixation of the rim prevents unwanted dodging from the reference plane, since z. B. the deformed rim on the bolt circle and / or on the central bore, which penetrates the Radanschlussfläche (flange) is fixed. This can be z. B. also done by suitable device parts, which engage hydraulically or pneumatically in the holes on the bolt circle and / or in the central bore of the wheel pad to arrange the rim safely and Bezugssebenenkonform.

A further advantage of a device according to the invention is that the required amount of energy can be introduced into the rim on the rotating rim by a suitable heat source (solution annealing) in order to achieve a trouble-free recovery via the deformation body or the like. In this case, one will usually proceed so that not only rad- but also material-specific heat only so far introduces that the heating of the rim remains in this area below the critical structural transformation temperature. This can be achieved in a particularly simple manner by virtue of the fact that the rim preferably rotates upon heating, during which also during the deformation process or afterwards with a measuring tool, eg. As a dial indicator, always a continuous measurement can take place, which is associated with the homogeneous heating and / or the action of the deformation body on the deformed rim parts. It can thus be determined even when heating, whether certain deformed rim parts alone by the heating process and the internal stresses that have arisen in the deformation of the rim part sufficient to reduce this deformation in part and whether and how far the deformation body on the deformed Felgenenteil has forces to exercise to return the remaining deformation within the specified tolerance values. The measuring device and / or the heating device including a possibly the heated rim area measuring temperature sensor can either be connected to a monitor and / or a printer or to any other display device, eg. B. to an oscilloscope, connected, so that for each rim immediately a log can be made, which is also evidence against insurance companies and courts. The possibility of documenting the repair path (measurement of the deformation wheel before and after repair), together with the documentation of the introduced energy parameters, is a decisive criterion for developing a so-called recognized repair process from this recovery technique. A so-called damage classification is created simultaneously.

Whether the rim is subsequently X-rayed at the directed surface sections is reserved for the severity of the deformation. In the case of severe deformations and particularly critical deformations, in addition to the logging of deformations, it will also be possible to record the form in terms of writing or image technology, in order to document that the rim has been returned to the prescribed tolerance values.

The deformation of the body is driven by a motor so that it is at least in a plane parallel to the axis of rotation of the rim displaceable and / or parallel to at least one plane passing through the axis of rotation pivotally arranged by a limited amount and in the respective pivot position also locked.

Due to the various devices, even different surface areas of the rim can be reliably achieved even with a complicated cross-sectional configuration with a deformation body and be deformed accordingly. For example, with the deformation body not only from the outside at the periphery of pressure, but also under the rim flange and beyond this into the rim itself with the deformation body are taken to make unintentional deformations here.

It is particularly advantageous that the deformation body is attached to a motor-movable arm, and can act on this by compressive or tensile stress on the deformed region of the rim, wherein the arm by 180 °, preferably at an acute angle, pivotally and / or in at least one plane extending parallel to the axis of rotation of the rim and displaceable by a motor infinitely telescopically axially adjustable and in the respective desired position is also locked.

In the invention, you can exercise with the deformation of body not only from the outside at the periphery of pressure, but also reach under the rim flange and beyond this in the rim itself with the deformation body to reverse unwanted deformations here.

It is particularly advantageous that the arm is fastened to a slide which can be driven by at least one motor drive, such as linear motor, spindle drive or alternately on both sides by pressure medium pressure piston-cylinder unit, parallel to the axis of rotation of the rim and in each desired position lockable.

The embodiment according to claim 2 describes an advantageous embodiment of the invention. In the embodiment according to claim 3 , the transmission element formed as a pressure axis is only in the axial direction adjustable by motor, but does not rotate, while in the embodiment according to claim 4 is additionally rotationally driven by a motor.

By trained as a coupling piece receiving disc with through hole centering pins can be inserted, such that the centering pins are adjustable to the respective bolt circle of the rim to be straightened. In this way, a plurality of through holes with different dimensions and / or radii can be arranged on a receiving disk, so that a receiving disk is suitable for numerous rims. The locating pins to be arranged in the receiving disc engage in locking the rim on the receptacle in the holes on the central flange of the rim and center and lock them. For this purpose, z. B. the corresponding centering with a corresponding chamfer, taper or spherical shape or the like may be provided according to the holes of the rims, so that there is a positive engagement of the centering pin and a reliable locking of the rim. As a result, the rim in the device can be arranged in relation to the reference plane, as on a vehicle to which it belongs.

In the embodiment according to claim 5 , the rim can be particularly fast to arrange the recording. To a certain extent, with a movement of the hand, the lock disk can be removed from a groove arranged in the axis of rotation by a movement directed orthogonally to the axis of rotation of the rim and engages in the lock plate like a fork behind the flange of the rim and thereby locks it axially on the shaft.

The claims 6 and 7 describe further advantageous embodiments.

The claims 8 to 12 describe further advantageous embodiments of the invention. In these embodiments, further deformation bodies are arranged in the form of manipulation bodies, which can be driven and locked axially in opposite directions by a motor. The deformation body can be z. B. deliver radially. In this way, in addition a compressive or tensile stress on certain areas of the rim, z. B. on rim flanges, be exercised when z with another deformation body. B. from above, or pulled from below.

Fig. 1

Eine Vorrichtung gemäß einer bevorzugten Ausführungsform der Erfindung in schematischer Seitenansicht, ohne Felge, allerdings mit Maschinenkastendeckel und Steuerständer;

Fig. 2

die Vorrichtung gemäß Fig. 1, in perspektivischer Darstellung, mit einer aufgespannten Felge und angesetztem Verformungskörper;

Fig. 3

die aus Fig. 2 ersichtliche Vorrichtung, ebenfalls in perspektivischer Ansicht, allerdings von einer anderen Ebene aus gesehen;

Fig. 4

eine Einzelheit aus den Fig. 2 und 3 in größerem Maßstab;

Fig.4a

die geschnittene Felge aus Fig. 4 in der verklemmten Seitenansicht, und

Fig. 5

eine Explosionsdarstellung, gebildet aus einer Aufnahme, Antriebswelle, Felge und Kupplungs- bzw. Spannteilen, ohne die weiteren Maschinenteile.

In the drawing, the invention - partly schematically - illustrated in embodiments. Show it:

Fig. 1

A device according to a preferred embodiment of the invention in a schematic side view, without rim, but with the machine box lid and control stand;

Fig. 2

the device according to Fig. 1 in perspective, with a clamped rim and attached deformation body;

Fig. 3

from Fig. 2 apparent device, also in perspective view, however, seen from another level;

Fig. 4

a detail from the Fig. 2 and 3 on a larger scale;

4a

the cut rim Fig. 4 in the bound side view, and

Fig. 5

an exploded view, formed from a receptacle, drive shaft, rim and coupling or clamping parts, without the other machine parts.

The reference numeral 1 in the drawing denotes a straightening machine having a frame which consists essentially of two spaced and parallel to each other arranged double-T-beams 2 and 3. The double T-beams 2 and 3 may be connected by cross members, not shown. It is also possible to replace the double-T-beams 2 and 3 by a closed, in plan view approximately rectangular frame. Furthermore, it is conceivable to set up the machine on vibrating concrete, on vibrating metal blocks or the like in order to arrange them vibration-isolating with respect to the erection floor.

The straightening machine 1 has a motor housing 4, in which a suitable drive motor, for. B. a continuously variable three-phase motor or a hydraulic motor, with gear 74, is arranged. Bearing blocks for the engine are designated by the reference numerals 5 and 6.

The reference numeral 7 ( Fig. 1 ) refers to a control panel to turn on the various motor drives, but also to be able to regulate, for. B. in their speeds or their delivery speeds or delivery movements to change. Shift levers 8, 9 and 10 are in Fig. 1 represented on the control panel 7 purely schematically and without claim to completeness.

At the axial distance - in the longitudinal axial direction of the double-T-beams 2 and 3 - a box 11 is arranged at the opposite end of the leveler 1, in which several, in the illustrated embodiment, three spaced apart and with their longitudinal axes parallel to each other motor drives 12, 13 and 14 are provided. These motor drives 12, 13 and 14 can be used as linear motors, as electric spindle drives or alternately on both sides by pressure medium pressure, z. B. pneumatically or hydraulically, to be acted upon piston-cylinder units (not shown in detail), the motor drives 12 and 14 are equipped by the side wall 15 of the box 11 outstanding at their free end portions with manipulation bodies 16 and 17, having in the illustrated embodiment circular arc or sector-shaped shape and with the surface parts to be deformed, z. As spokes, stars or the like in the drawing generally with the reference numeral 18 shown rim of a motor vehicle, for. B. a car, can work together. The manipulation body 16 and 17 can exert tensile or compressive stresses on rim parts are therefore adjustable in the direction C and D and also locked in the respective desired position. The power supply to the motor drives 12, 13 and 14 is not shown. These can be compressed air or hydraulic lines, or electric cables to bring the energy to the motor drives 12, 13 and 14. In the event that compressed air or a hydraulic medium is used, suitable pumps, pressure vessels and supply lines are available, which are also not illustrated in the drawing.

The manipulation body 16 and 17 are in case of need also pivotable and / or transversely displaceable, which is a corresponding storage of the motor Drives 12 to 14 requires. For this purpose, the drives 12, 13 and 14 are guided and mounted in a guide rail in the direction T - Z displaceable and lockable. These feed movements can be effected via a hand wheel 70 via a spindle 71. The control in the direction of T and Z can be made steplessly by operating switching levers 67, 68 and 69. In the respectively desired pivoting or transverse adjustment then the manipulation body 16 and 17 are also locked.

The motor drive 13 drives a rod-shaped transmission element 19, which is adjustable in the direction X or Y and engages through an opening of the side wall 15. This rod-shaped transmission element 19 has at its end a thrust member 20 which has in its interior a recess 21 into which engages a shaft 22 with receptacle 23. The shaft 22 and receptacle 23 are connected to each other by gearing and are rotationally driven by a preferably arranged in opposite directions by the disposed in the motor housing 4 drive. In addition, the shaft 22 is continuously adjustable by a motor drive 24 in the direction of X and Y and also locked in the desired position.

The transmission element 19 may be a piston rod, which is hydraulically - via a piston (not shown) - driven in opposite directions. This also applies accordingly to the manipulation body 16 and 17, which also Pistons and pistons (also not shown) can represent that the transmission element 19 can be driven hydraulically controlled in the opposite direction. Furthermore, it is possible, all driven deformation body, z. As well as 59, room-articulated adjustable and lockable in the respective position and drivable form.

The shaft 22 has a groove 25 at its end portion.

At 26 is a spacer ring ( Fig. 5 ), which is made of a metallic material, but also of a softer material than the rim 18, z. B. of a suitable plastic, aluminum or a copper alloy may consist. This spacer ring 26 is intended to compensate for the different diameters of the rim center bore 50 to the annular shoulder 45.

By the reference numeral 27 is a receiving disk with numerous through holes 28, into the centering pins 29 are fit and centered plugged. The bolts 29 are arranged on a reference circle corresponding to the through holes 28 in the receiving disk 27, which corresponds to the pitch circle diameter of arranged in the center flange 30 of the rim 18 holes 31 for securing the rim 18 to the vehicle in question. At the Fig. 5 particular apparent rim 18 a total of five such through holes 31 are provided. Accordingly, 27 to be arranged on the receiving disk 27 three to ten centering pins 29 which engage in the holes 31 of the center flange 30 match. The pickup disk 27 also has a central opening 32 through which the shaft 22 can reach through.

The reference numerals 33, 34 and 35 denote spacer and receiving discs, all of which have through-holes, of which only the through-bore 36 has been provided with a reference numeral. In the Fig. 5 outer disc 35 has a collar-shaped projection 37 which is provided with a through hole 38 which is aligned with the hole provided in the disc 35. The bore 38 passes over a chamfer 39 in the lateral surface of the collar-shaped projection 37 via. The chamfer 39 is designed spherical. The spherical configuration corresponds to the spherical shape of a lock washer 40 whose spherical surface is designated 41. The lock washer 40 has on its surface facing away from the spherical surface 41 a planar portion 42 which is bounded above by a rectangular wall portion 43 extending orthogonally thereto. The section 42 extends in the installed position orthogonal to the longitudinal axis of the shaft 22. The shaft 22 is arranged freely to compensate for tolerances in the motor shaft 23. At 72, an air gap between the motor shaft 23 and the shaft 22 is designated. The lock washer 40 has a longitudinal slot 44 passing through it approximately in the center, which also passes through the spherical surface 41 and extends orthogonally to the longitudinal axis of the lock washer. The transverse dimension of the slot 44 and its longitudinal dimension are formed so that the slot 44 can fit into the annular groove 25 of the shaft 22.

After the arrangement of the spacer ring 26 on the shaft 22, the sliding of the rim 18 on the shaft 22 and arranging the centering pin 29 with the receiving disk 27 and the arrangement of the spacers 33, 34 and 35, the shaft 22 protrudes with its with the annular groove 25 provided portion forward through a central bore 50 of the rim 18 and can be locked by attaching the lock plate 40 axially and radially. Now, if the motor drive 24 is turned on, such that the shaft 22 is moved in the direction X, the rim 18 is firmly against the receptacle 23 and the annular shoulder 45, optionally with the interposition of the spacer ring 26, pressed and both radially and axially fixed on the shaft 22. The number of spacers 33, 34 and 35 may be formed differently from case to case and depending on the axial length dimension of the rims 18. Because of this, z. As well as the spacer 33 or 34, or it may also be omitted both, if this corresponds to the operating conditions.

The rim 18 has in the illustrated embodiment, the rim mouth E, the rim diameter F and various so-called humps z. B. 46, 47 as annular deformations of the rim 18, a star 48, which forms a plurality of spokes, which may be integrally formed integrally with the rest of the rim body, in particular materially. The rim 18 may also be multi-part, z. As in steel rims, be formed, while in existing aluminum alloys rims usually from the particular Fig. 5 can have apparent embodiment. The center hole 50 penetrates one Wheel terminal surface 49, which is orthogonal to the axis of rotation of the wheel, which is arranged through the central bore 50. Through the central bore 50 and the shaft 22 engages. Symmetrical to the central bore 50, the bores 31 are generally provided for receiving fastening screws for the wheel on the vehicle, while they serve on the straightening machine recording the centering pin 29. The bores 31 may have conical or spherical contact surfaces for the screws used on the vehicle, in particular on the car, so that in case of need the centering bolts 29 may be provided with such conical or spherical contact surfaces in order to achieve a good fit and thus as centric and uniform as possible Force on the tensioning of the rim 18 on the receptacle 23 to effect.

At 51, a so-called rim flange is provided, which may have different configurations depending on the rim type in cross section. When pressed or cast or forged rims 18, especially aluminum rims, just these rim flanges 51 are by approaching curbs, when driving up and down sidewalks or driving over crossways or traffic-calming hills or obstacles, z. B. in so-called Niederquerschnittsreifen, particularly at risk.

At 52 a merely schematically indicated heating device is provided, which can be radially and / or axially or spacially articulated to the clamped rim 18 and in the respective desired position with respect to the rim 18 also locked. It may be a gas burner, an inductively operating device or the like, to which the energy is supplied electrically or by gas conduction (not shown).

With the heater 52 or in advance in a convection oven, the rim 18 can be heated in areas or in total to the required extent.

With 53, a measuring device is designated by the z. B. the concentricity properties and / or runout properties to a reference plane of the clamped and rotationally driven rim 18 and thus also determine deformations of the rim 18 in terms of size. With the measuring device 53, compliance with tolerances can also be measured after straightening. The measuring device 53 can be connected to a printer and / or to a monitor or to a computer (not shown) in order to document the measured values, at least to be able to display them. On the monitor, on a printing plate or the like, prescribed tolerance values for the respective rim type can be specified and displayed in order to comply with these tolerance values during straightening.

In the upper area (seen in the plane of the drawing), a carriage guide 54 is arranged for a carriage 55, the low-friction rolling bearings, z. B. is guided over ball screws and / or rollers or the like. The carriage 55 is motor in the direction X or Y, ie parallel to the longitudinal axis of the shaft 22, adjustable and arranged lockable in the respective desired position.

With the carriage 55, an arm 56 is connected by gearing, in the direction A or B by a limited amount, preferably by an angle deviating from 180 °, z. B. an acute angle, adjustable and in the particular desired pivot position is also locked, as this is a comparison of Fig. 1 and 2 shows the different pivoting positions of the arm 56 and different positions of the carriage 55 make clear.

The arm 56 is associated with a motor drive 57, which is presently designed as a linear motor, in particular as alternately on both sides with pressure medium pressure, in particular hydraulically or pneumatically, to be acted upon piston-cylinder unit. In this way, a piston rod 58 is telescopically adjustable in length. At the end portion of the piston rod 58, a deformation body 59 is provided which has contours 60 and 61, respectively, with which the deformation body 59 with surface regions of the rim 18, for. B. with the rim flange 51, can cooperate to undo deformations again. For this purpose, the motor drive 57 of the arm 56 in one or the other Direction turned on and then exerts a pressure and / or tensile stress with the deformation body 59 on the area to be machined of the rim 18. By the pivoting movement of the arm 56 in the direction A or B and by the method of the carriage 55 in the direction X or Y and by the retraction and extension of the piston rod 58, the most diverse areas and portions of the rim 18 can be achieved, even at the star 48th or on the rim flange 51. The arm 56 may consist of a T-beam, U-beam, double T-beam, a box, a square tube or the like, in which then arranged and guided the motor drive 57 with the piston rod 58 is. The arrangement has been made so that, if necessary, very high force loads can be exerted on the corresponding areas of the rim 18. Incidentally, the carriage 55 is likewise guided on two supports 62 and 63, which are guided at a distance from one another and parallel to the supports 2 and 3, in their longitudinal axis direction, so that very high stresses can be absorbed.

The contour 61 may, for. B. be designed as a pressure roller, while the contour 62 z. B. may be formed as a pressure piece. The pressure piece 61 may be made of a suitable plastic, for. Example of a Teflon pressure piece, to protect the surface of the rim 18 to be machined.

In difficult and particularly power consuming manipulations of the rim 18, these will not only radially and axially lock by clamping by means of the motor drive 24 on the receptacle 23, but also additionally the thrust member 20 in the off Fig. 2 apparent position, ie press against the disc 35 and thus the entire rim receiving device with shaft 23 and clamping device 22, 24 press against a located in the motor housing 4 abutment 73 to exclude even the slightest tolerances with certainty and higher stability in the radial direction to reach.

The procedure for straightening a defective rim 18 is z. B. using the device according to the invention as follows:

The defective rim 18 is first cleaned and freed of their balance weights. Then the receiving disk 27 is fitted with the centering pin 29, which fits to the pitch circle diameter of the holes 31 of the respective rim 18 in order to clamp the rim 18 on the receptacle of the shaft 22 can. After arranging the rim 18 on the shaft 22 of the motor shaft 23, the lock plate 40 is inserted into the annular groove 25, after previously in case of need, the distance and receiving discs 33 to 35 were arranged.

Then, the shaft 22 is moved by starting the motor drive 24 in the direction X and the rim 18 tensioned. Following this, preferably the motor drive of the shaft 22, the rim 18 drive in one or the other direction, wherein usually a motor drive is used, which is adjustable in its speed, z. B. an electric motor. It is also possible to operate by manual operation. The speed control can also be done via a potentiometer, by a gear motor, by a stepper motor or the like. The motorized rotary drive can also be integrated in the receptacle 23 and form a motor shaft.

By means of the measuring device 53, the concentricity of the rim 18 is measured and, in particular, the deformation with respect to the permissible tolerance values is determined. By the measurement can be determined at the same time whether the rim 18 has been properly clamped. Then z. B. the degree of deformation can be determined. These are then marked on the rim 18. The amount of runout, the tolerance deviations, etc. are given by the manufacturers. For example, the run-flat properties, ie the extent to which the rim flange 51 can be deformed outwards, are only 0.2 mm for a specific manufacturer according to ETRTO guidelines.

After this so-called initial measurement has been carried out and also the run-flat properties of the rear horn 64 have been determined, If necessary, the rim 18 can be heated in regions or in total via the heating device 52. If the deformation is still a young deformation, the internal stresses of the deformation due to heating already partially return these deformations.

During the rotation of the rim 18, the temperature can be determined by a temperature meter 65, taking into account the manufacturer's material sheets.

After the required heating, depending on the material properties, the type of deformation, their spatial assignment to the rim 18 of the deformation body 59 is brought about the arm 56 in position and then by turning on the motor drive 57, a corresponding force on the deformation points in the circumferential direction , Axial direction or the like, exerted and the deformation eliminated by rolling, pulling, pressing and stabilizing.

The contours 60 and 61 of the deformation body 59 make it possible here to proceed very sensitively and accurately and to deform the rim 18 back into its shape lying within the tolerances. By pivoting and / or pressure or pulling movements by means of the arm 56 on the deformation body 59 can be difficult deformations, z. B. in the area of the star 48 in Transverse region to the rim flange 51 or 64 again deform back so that the rim 18 reaches its original, factory-fit shape, and without causing adverse material changes.

In the case of very strong deformations, possibly rips out of the rim 18, etc., the rim 18 can also be subsequently X-rayed in case of need, in order to make sure that no adverse material changes in the rim material have occurred.

The device according to the invention and the method make it possible to straighten rims 18, in particular car rims, on an industrial scale.

LIST OF REFERENCE NUMBERS

1

straightener

2

Double-T-carrier

3

"

4

motor housing

5

bearing block

6

"

7

control desk

8th

gear lever

9

"

10

"

11

box

12

Drive, motor

13

"

14

"

15

Side wall

16

manipulation body

17

"

18

rim

19

gear element

20

Axialdruckkörper

21

Inside of the axial thrust body, recess

22

wave

23

Intake, motor shaft

24

Drive, motor

25

groove

26

spacer

27

receiving disc

28

Through hole (bolt circle)

29

centering

30

center flange

31

Bore (screw seat)

32

perforation

33

Spacer and pick-up disc

34

"

35

"

36

Through Hole

37

Approach, collar-shaped

38

Through Hole

39

Bevel, spherical

40

locking plate

41

Surface, spherical

42

Section, planar

43

Wall part (handle)

44

longitudinal slot

45

annular shoulder

46

Hump

47

"

48

star

49

wheel mounting face

50

center bore

51

rim flange

52

heater

53

measuring device

54

carriage guide

55

carriage

56

poor

57

Drive, motor

58

piston rod

59

deformable body

60

contour

61

"

62

carrier

63

carrier

64

Horn, behind

65

Temperature measuring device

66

-

67

gear lever

68

"

69

"

70

handwheel

71

spindle

72

air gap

73

thrust bearing

74

engine

75

Rotary actuator

76

push drive

A

swivel device

B

"

C

Creation direction, stroke

D

"

e

Rim width

F

Rim diameter

G

Stroke, arm (manipulation arm)

H

Hub, arm

T

Stroke, adjusting device

Z

"

X

Stroke, adjusting device

Y

"

bibliography

• DD 240 152 A1
• DE 2 224 109 A
• DE 2 314 858 A
• DE 37 31 924 A1
• DE 34 43 207 C1
• DE 29 09 618 C2
• WO 96/25257 A1
• WO 98/03281 A1
• EP 0 190 958 A2
• EP 1 208 365 A1
• WO 01/165 72 A1
• US 5,634,361
• US 5,499,524
• EP 1 398 093 A1
• EP 1 116 529 A2
• JP 2001 121212 A

Claims (12)

1. Device for the non-cutting dressing of rims (18) for motor vehicles, such as motor car, commercial vehicle and motor cycle rims, having a motor-powered rotary mounting member onto which the deformed rim (18) can be fastened axially and radially with regard to the circle of drilled holes (31) and/or wheel connecting surface with which the rim (18) is normally fastened to the motor vehicle and having one or more shaping members (59) fastened to an arm (56) which shaping member or members inside and/or outside the circumference of the rim (18) - on the rim flange or in the transition zone to the spokes - acts by pressure or tension stresses on the deformed portion of the rim (18) and reshapes this portion within specified tolerances, where the arm (56) can be swivelled through 180°, preferably through an acute angle, and/or displaced in one or more planes running parallel to the rotary axis of the rim (18) and can be steplessly telescopically displaced axially by motor power and also locked in the desired position, where in the device the radial and axial run-out of the rim (18) can be measured - within prescribed tolerances - and measurements outside the tolerance values can be incorporated into the dressing of the rim (18) inside the device and having a heating means for heating up the rim rotatably fastened in the device below the critical structure transformation temperature, where the arm (58) is disposed on a sliding member (55) which can be driven parallel to the rotary axis of the rim (18) by in particular a linear motor, spindle drive or piston-cylinder unit to which pressure can be hydraulically or pneumatically applied on both sides alternately by a pressure medium and which can also be locked in the desired position.
2. Device in accordance with claim 1, characterised in that additionally one or more gear elements (19) which is or are constructed as a pressure axle and has an axial thrust member (20) and can be displaced at least axially in opposite directions under motor power and can also be locked in the desired position is or are provided.
3. Device in accordance with claim 2, characterised in that the gear element (19) with its axial thrust member (20) is - if necessary, steplessly - non-rotatably disposed.
4. Device in accordance with claim 2, characterised in that the gear element (19) with its axial thrust member (20) can be driven- if necessary, steplessly - in opposite directions under motor power.
5. Device in accordance with claim 1 or any one of the claims following it, characterised in that the shaft (22) running centrally through the middle hole (50) of the middle flange (30) with the rim (18) is provided at its free end portion with a groove (25) running all the way round it into which groove a locking disk (40) provided with a longitudinal slot (44) can be inserted and the rim (18) thereby be at least axially locked onto the shaft (22) in a clamping position.
6. Device in accordance with claim 2 or any one of the claims following it, characterised in that further motor drives (12, 13 or 14) which are likewise provided with rod- or shaft-shaped gear elements (19) each of which incorporates on its end portions a manipulating member (16 or 17) which acts on the rim portions to be reshaped under motor power, are provided parallel to the gear element (19).
7. Device in accordance with claim 6, characterised in that the gear elements (19) and/or their motor drives (12, 13 or 14) can be displaced - preferably under motor power - at right angles (T or Z) to the rotary axis of the shaft (22) and can be locked in the desired position and that the drives (12, 13 and 14) can by means of a spindle (71) be displaced or the like and can be locked.
8. Device in accordance with claim 6 or 7, characterised in that the motor drives (12, 13 and 14) can be displaced transversely in a box guide by a spindle drive (T or Z).
9. Device in accordance with claim 1 or any one of the claims following it, characterised in that a number of manipulating members (16, 17) are disposed so that they can be positioned under motor power at an angle and/or articulatedly in any direction relative to the rim (18).
10. Device in accordance with claim 9, characterised in that the manipulating members (16 and 17) are disposed exchangeably.
11. Device in accordance with claim 1, characterised in that the axial thrust member (20) is disposed rotatably and exchangeably.
12. Device in accordance with claim 1 or any one of the claims following it, characterised in that a spacer washer (35) incorporates a bevel (39) which coacts with the locking plate (40) and that both the bevel (39) and the locking plate (40) coact positively and force-resistantly with a similarly designed spherical surface (41).

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