Description of the Prior Art Usually, machines for laminating wheel rims of the simple-support type do not have any kind of reinforcement mechanism to aid in performing their function. While performing the lamination operations, the two axles of the machine that approach each other to form the piece mechanically undergo a flexion due to their length and to the force applied to carry out the lamination. When laminating wheel rims that have measures of up to 40.6 cm (16") in diameter and that are constituted by low- resistance materials, the flexion effort to which the axles of the machine are subjected are within the parameters foreseen in project, and they have coherent useful life.

However, with the need for manufacturing wheel rims of up to 50.8 cm (20") in diameter and made of considerably more resistant materials, it became necessary to apply considerably greater conformation efforts, which caused a load on the axles of the machines heavier than that determined by the manufacturer as the maximum admissible load. As a result, the useful life of the axles and their adjacent components, such as rollers and hydraulic pressure lines was substantially shortened. What is worse, it was not possible to foresee when a break would occur, which constantly leads to non-programmed stoppages of the machine for repair and consequent delays in the production line and damages.

Objectives of the invention The present invention is a reinforcement device that can be used in usual laminating machines existing in factories, making possible the manufacture of larger and more resistant wheel rims, with good quality and low cost, without potentially destructive overloads on the machine. Since the device of the present invention prevents flexion of the laminating axles, the rim can be mechanically conformed with lesser deformation load, which avoids overload on the hydraulic system of the machine, which generates this force, and also spares the axles and other adjacent components such as rollers, which are subjected to loads for which they were designed, without excess. In addition, breaks are prevented, which constantly lead to non-programmed stoppages of the machine for repair and consequent delay in the

production line and damages. Also, the device brings about greater uniformity between the successive lots of rims produced, besides reducing dimensional tolerances of each piece, which results in better quality and more satisfaction of the clients.

Brief description of the invention The present invention describes a reinforcement device, especially a reinforcement device that can be used in a machine for laminating wheel rims for automotive vehicles, the machine comprising at least two substantially parallel rim- lamination axles, the reinforcement device comprising a body associated to the housing of the lamination machine, the positioning of the body varying with respect to the housing, the body being provided with two bearings supportable on respective end regions of the axles, so that the axles are substantially maintained parallel during the operation of laminating the rim, at least one bearing being moveable with respect to the reinforcement device by a moving means.

In a first preferred embodiment of the invention, the body is substantially C- shaped, having two bearings moveable axially with respect to the body and in a synchronized way, in opposite directions, by respective first and second moving means.

In a second preferred embodiment of the invention, the body comprises two substantially parallel bars, which are joined, at respective first ends, to a reinforcement element and at their second ends, to a first bearing, the body being moveable by a fifth moving means in the direction of the length of the body. The second bearing is fixed with respect to the reinforcement device.

Brief description of the drawings The present invention will now be described in greater details with reference to an embodiment represented in the drawings. The figures show: -figure 1: a front view of a first configurative variation of the reinforcement device of the present invention; -figure 2: a side view of the device illustrated in figure1 ; -figure 3: a top view of the device illustrated in figures 1 and 2; -figure 4: a front view of a second configurative variation of the reinforcement device of the present invention; -figure 5: a side view of the reinforcement device illustrated in figure 4; e

figure 6: a top view of the device illustrated in figures 4 and 5.

Detailed description of the figures As can be seen in figures 1,2, and 3, a first configurative variation of the present invention comprises a reinforcement device 1 for use in a Grotnes-type lamination machine, which have first and second horizontal laminating axles 21,22 that are moveable and substantially parallel to each other, both axles 21,22 having a roller 90 at their respective end regions.

The device 1 is constituted by a C-shaped body 4, the longitudinal axis oi which is substantially parallel to the axles 21,22, and is fixed to the housing 2 of the lamination machine by means of an articulated assembly 8 formed by a firs articulation 72 associated to the housing 2 and to a first end of the first supportinc arm 60, the first supporting arm 60 being substantially horizontal and parallel to the axles 21,22 and having its second end associated to a second articulation 71. The second articulation 71 is also associated to a first end of a second supporting arm 6' that is substantially horizontal and substantially perpendicular to the axles 21,22, the second end of which is associated to a third articulation 70, the third articulation 7 ( being also associated to the C-shaped body 4.

The C-shaped body 4 comprises two substantially U-shaped bearings 41,42 the bearings 41,42 being positioned in such a way, that their open portions face thE respective end regions of the axles 21,22, being further axially aligned and being moveable in a synchronized way in the longitudinal direction of the length of the bod 4 and in opposite directions by means of respective first and second hydraulic-motio means 51,52.

When the lamination machine is off or when no rim is being laminated, th body 4 is retracted in a rest position 10.

In order to carry out the lamination of a rim (not shown), the latter should be place on the lamination machine between the first horizontal laminating axle 21, which ha a first laminating roller 31, and the second horizontal laminating axle 22, which has second laminating roller 32. Next, the C-shaped body 4 is moved by a hydraul moving device (not shown) located on the supporting arms 60,61 through paths T and T2 (located on a substantially horizontal plane and comprising the supportir arms 60,61), in this order, passing by an intermediate position 11 and assuming i work position 12. Then, the lamination machine moves the laminating axles 21, d vertically in opposite directions, approaching them to each other, while the fir

hydraulic moving means 51 and the second hydraulic moving means 52 move the bearings 41,42 similarly to the movement of the axles, until the bearings 41,42 rest on the respective rollers 90 and exert pressure on the respective axles 21,22, thus generating a force component in a direction contrary to the component that causes flexion of the axles 21,22, enabling them to work as parallel to each other as possible, thus bringing benefit to their durability and greater precision and uniformity to the wheel rims produced.

After the lamination of the rim is completed, the moving means 51,52 move the bearings 41,42 apart from each other. Then, the hydraulic device located on the supporting arms 60,61 moves the C-shaped 4 through the horizontal paths T2 and T1, in this order, passing by the intermediate position 11, until it reaches the rest position 10, while the machine moves the axles 21,21 vertically apart from each other and enables one to remove the mechanically conformed rim. Then, the lamination cycle of another rim begins.

A second embodiment of the present invention is illustrated in figures 4-6 and comprises a reinforcement device 100 for use in Sudrad-type lamination machines, which comprise a first fixed horizontal laminating axle 121, and second horizontal laminating axle 122 that is vertically moveable, both axles 121,122 having, at their respective end regions, a roller 90, the reinforcement device 100 being moveably associated with respect to the housing 102 of the machine.

The device 100 comprises a structure 132 that is substantially horizontal and parallel to the housing 102 of the lamination machine, a longeron 133 that is substantially horizontal and parallel to the housing 102, a third hydraulic moving means 103, composed by hydraulic cylinder substantially horizontal and parallel to the longitudinal axis of the structure 132, an articulation 109, and a fourth moving means 101, that is pneumatic and composed by a pneumatic cylinder substantially vertical and perpendicular to the longitudinal axis of the structure 132, the pneumatic moving means 101 and the articulation 109 being associated to the housing 102 of the machine and to the horizontal longeron 133, while the third hydraulic moving means 103 is associated to the longeron 133 and to the structure 132. Thus, the horizontal hydraulic cylinder of the third hydraulic moving means 103 permits horizontal movement of the structure 132 with respect to the longeron 103 in the direction of its longitudinal length, while the articulation 109 and the pneumatic moving means 101, which makes vertical movement, enable angular movement of

the assembly comprising the longeron 133 and the structure 132, having the articulation 109 as a center. At a first end of the structure 132 a body 104 is fixed, which is substantially perpendicular to direction of the longitudinal length of the structure 132 and to the axles 121,122.

The body 104 comprises two substantially parallel bars 105, a reinforcement element 106 associated to a fifth hydraulic moving means 150, the element 106 being substantially perpendicular to the bars 105, joining them to each other at their respective first ends, the body 104 further comprising a first bearing 142 associated to both bars 105 and substantially perpendicular to them, the bearing 142 further joining the two bars 105 by their respective second ends and functioning as a reinforcement element of the body 104. A second bearing 141 and the fifth hydraulic moving means 150 are fixed to the structure 132 of the device 100 on a joining surface 107, by means of four screws 108. Due to the conception of the bores of this surface 107, which permit fixation of the screws 108 in different vertical-positions, it is possible to achieve a precise regulation of the positioning of the fifth hydraulic moving means 150 and of the second bearing 141 on the structure 132, thus contributing to increase the range of utilization of the lamination machine when it is coupled to the device 100. The bearings 141,142 are substantially U-shaped and are positioned in such a way, that their open portions face the respective end regions of the axles 121,122, the bearings 141,142 being further aligned axially.

The body 104 is moveable in the direction of its longitudinal length by the fifth hydraulic moving means 150, by means of the rod 151. Therefore, the reinforcement element 106, the two bars 105 and the second bearing 142 move with respect to the fifth hydraulic moving means 150 and the first bearing 141.

When the machine is off or when no rim is being laminated, the body 104 is retracted in a rest position P1.

In order to carry out the lamination of a rim (not shown), the latter should be placed on the lamination machine between the fixed horizontal laminating axle 121, which has a first laminating roller (not shown), and the moveable horizontal laminating axle 122, which has a second lamination roller (not shown). Then, the lamination machine moves the moveable laminating axle 122 vertically as far as the position 122', approaching it to the fixed laminating axle 121, while the device 100 is horizontally moved by the third hydraulic moving means 103 in the direction of the longitudinal length of the structure 132, until it reaches the position P2. In this

position P2, angular movement of the device 100 occurs, caused by the descending vertical movement of the pneumatic moving means 101, combined with the actuation of the articulation 109, thus causing the second bearing 141 to touch the roller 90 located at the outer portion of the axle 121 of the machine.

Simultaneously, the fifth hydraulic moving means 150 moves the body 104 in the rising vertical direction, causing the first bearing 142 to touch the roller 90 located at the outer portion of the axle 122, when the latter if located in the position 122'.

Therefore, each of the bearings 141,142 exerts pressure on the respective axle, generating a force component in a direction contrary to the component resulting from the force necessary to the mechanical conforming of the rim and that causes flexion of the axles 121,122, thus enabling them to work as parallel to each other as possible, which brings benefits to their durability and greater precision and uniformity to the wheel rims produced.

After completing the lamination of the rim, the body 104 is moved in the vertical and descending direction by the fifth hydraulic moving means 150 apart from the bearing 142 of the axle 122, while the pneumatic moving element 101 makes rising vertical movement, thus moving the device 100 in an angular manner, having with the articulation 109 as a center, so that the second bearing 141 no longer touches the axle 121. Then, the third hydraulic moving means 103 moves the device 100 horizontally as far as the rest position P1, while the machine moves the axle 122 vertically apart from the axle 121 and enables one to remove the mechanically conformed rim. Then the cycle of lamination of another rim begins.

Evidently, a person skilled in the art understands that hydraulic, pneumatic or electric moving means may be indistinctly used, according to the needs or limitation of the project, without the invention undergoing any substantial alterations that differentiate it from the preferred embodiments cited above.

A preferred embodiment having been described, it should be understood that the scope of the present invention includes other possible variations, being limited only by the contents of the accompanying claims, included here as possible equivalents.