IT202200026400A1 - WORKING CENTRE FOR PROFILES FOR WINDOWS - Google Patents

Description

Description of Patent for Industrial Invention entitled: ?PROCESSING CENTRE FOR WINDOW FRAME PROFILES?.

DESCRIPTION

The present invention relates to a machining centre for window and door profiles.

Window profiles are elongated bodies, made of plastic material, such as PVC, which are intended to be joined by welding to other profiles to create a window or door frame. The profiles, once cut to the desired length, are generally reinforced by inserting a metal reinforcement bar, which is then fixed to the profile; after which, this assembly is worked in order to create a series of holes for the installation of additional mechanical components, in this case the parts that allow the window to be opened/closed.

Known machining centers comprise a movement group designed to support profiles coming from previous machining stations, such as cutting centers, and to move them towards a machining group equipped with means for fixing the reinforcing bar and drilling means. The movement group comprises a plurality of support surfaces, each extending along a relative longitudinal direction and moveable along a direction of advancement transverse to the longitudinal direction.

In known machining centers, the machining group is arranged laterally to the movement group, downstream of the latter with respect to the direction of feed.

The profiles are moved from the handling group to the processing group along a processing direction transverse to the feed direction and substantially parallel to the longitudinal direction.

The fastening means and the drilling means are placed side by side along the working direction and the profiles are first subjected to a fastening operation of the reinforcing bar and then to a drilling operation.

Subsequently, the processed profile is transferred to further processing stations such as welding stations.

However, known machining centers have some drawbacks.

In fact, especially in the case of profiles of considerable length, the fastening operations must be carried out on multiple points of the profile itself which imply long times, which are further lengthened in the execution of the subsequent drilling operations. Therefore, the working group is occupied by the same profile for a long time preventing the working of a subsequent profile.

It follows, therefore, that even the subsequent processing stations may be slowed down in their operation while waiting to receive the necessary profiles.

Furthermore, such inconveniences may also lead to the need to interrupt the operation of the previous stations in order not to clog the movement group.

The main task of the present invention is to devise a machining centre for window and door profiles which allows the execution of the operations of fixing a reinforcing bar and drilling the profiles to be made extremely efficient.

Another purpose of the present invention is to devise a machining center for window and door profiles that allows the machining of multiple profiles at the same time.

A further aim of the present invention is to devise a machining centre for window and door profiles which allows for a reduction in the machining and production times of the window and door frames.

Another purpose of the present invention is to devise a machining center for window and door profiles that allows the aforementioned drawbacks of the known art to be overcome within the scope of a simple, rational, easy and effective solution at a low cost.

The above-mentioned purposes are achieved by the present machining centre for window and door profiles having the characteristics of claim 1.

Other features and advantages of the present invention will become more evident from the description of a preferred, but not exclusive, embodiment of a machining centre for window and door profiles, illustrated by way of example, but not of limitation, in the attached drawings in which:

Figure 1 is an axonometric view of a machining centre for window profiles according to the invention;

Figure 2 is an axonometric view of a fastening group of the machining centre according to the invention;

Figure 3 is a detailed axonometric view of the fastening group according to the invention;

Figure 4 is an axonometric view of a drilling group of the machining centre according to the invention;

Figure 5 is a detailed axonometric view of the drilling group according to the invention;

Figure 6 is a detailed front view of the drilling unit according to the invention;

Figures 7 and 8 are detailed axonometric views of the movement system and the synchronization system according to the invention; Figure 9 is a detailed axonometric view of the regulation system according to the invention;

Figures 10 and 11 are detailed views of the locking members according to the invention.

With particular reference to these figures, a machining centre for window and door profiles is generally indicated with 1.

In the context of this discussion, the expression "window frame profile" refers to an elongated body, made of plastic material, such as PVC, which is intended to be welded to other profiles to create a window frame, such as a window or a door. The machining centre 1 comprises at least one base frame 2, intended to be placed in contact with the ground, and at least one movement unit 3 associated with the base frame 2, capable of receiving a plurality of window frame profiles P and moving them along a feed direction A.

Each of the P profiles extends along a respective longitudinal axis. In accordance with the embodiment shown in the figures, each of the P profiles is provided with a base profile and a reinforcing bar arranged internally to the base profile.

The reinforcing bar is of the type of metal bar that is inserted inside the base profile in order to make the profile itself more robust and to avoid possible deformations caused by atmospheric temperature changes.

The movement group 3 comprises a plurality of support surfaces 4, each extending along a relative longitudinal direction L transverse to the direction of advancement A, suitable for longitudinally supporting a respective profile P and moveable along the direction of advancement itself.

The support surfaces 4 define a substantially horizontal work plane, above which the P profiles are subjected to machining.

In accordance with the embodiment shown in the figures, the movement group 3 is of the type of a dynamic table. The movement group 3 therefore comprises a plurality of support bodies 5 that can be moved discretely along the direction of advancement A and each defining a respective support surface 4.

However, it cannot be excluded that the movement group 3 is of a different type, for example of the type of a conveyor belt, a roller conveyor or similar.

Conveniently, the support bodies 5 and, consequently, the support surfaces 4 can be moved independently of each other.

The movement group 3 extends along the feed direction A between a first extreme zone 6 configured to receive the base profiles and a second extreme zone 7 configured to move the profiles P away following processing.

In particular, the handling group 3 receives the base profiles from a previous processing station, for example a cutting station suitable for obtaining, at the ends of the base profile, respective areas to be welded intended to be joined by welding to areas to be welded of other profiles. Following processing, the profiles P are then transferred from the second extremal zone 7 to further processing stations, such as welding stations.

In the movement between the first extreme zone 6 and the second extreme zone 7, the support bodies 5 are designed to support a respective profile P and pass over the work surface. The support bodies 5 are then designed to return again to the first extreme zone 6, passing over a return surface, below the work surface.

As explained above, the P profile also includes a reinforcing bar. The movement group 3 is therefore equipped with a loading area 8 in correspondence with which the reinforcing bars are inserted into the respective base profiles.

In detail, in correspondence with the loading area 8, the support body 5 is stopped to allow the insertion of the reinforcing bar into the respective base profile.

In accordance with the embodiment shown in the figures, the reinforcing bars are inserted into the base profile manually by an operator. It is not excluded, however, that the machining centre 1 may comprise an insertion group, associated with the movement group 3 in correspondence with the loading area 8 and suitable for automatically inserting the reinforcing bars into the respective base profiles. The machining centre 1 comprises at least one machining group 9, 10 associated with the base frame 2 and suitable for fixing the reinforcing bar to the base profile and for obtaining at least one hole on the profile P.

The at least one processing group 9, 10 is mounted above the movement group 3.

Helpfully, the workgroup 9, 10 is arranged above the work surface.

In other words, the processing group 9, 10 is configured to operate on the profile P during transit along the feed direction A. In detail, in correspondence with the processing group 9, 10, the support body 5 is stopped to allow the processing of the profile P.

The machining group 9, 10, therefore, carries out the machining when the profile P is arranged on the support surface 4.

Advantageously, the machining center 1 comprises at least two of the machining groups 9, 10 each associated with the handling group 3 and comprising:

- at least one fastening group 9 suitable for fixing the reinforcement bar to the base profile; and

- at least one drilling group 10 capable of making at least one hole on the profile P.

In detail, the fixing group 9 is intended to fix the reinforcement bar so that it remains in position during all the manufacturing phases of the window frame and, subsequently, during its use, while the drilling group 10 is intended to create one or more holes on the profile P for the installation of the additional mechanical components of the window frame such as the handle and the closing/opening organs.

However, it cannot be excluded that the machining centre 1 comprises more than two machining groups 9, 10.

Advantageously, the fixing group 9 and the drilling group 10 are arranged in succession to each other along the feed direction A.

The fixing group 9 and the drilling group 10 are distinct and separate from each other.

In this way, the two working groups 9, 10 can operate independently of each other and when the drilling group 10 intervenes on a P profile, the fixing group 9 can intervene on another P profile, allowing significantly reduced working times.

Furthermore, the independent movement of the support surfaces 4 allows for independent advancement of the profiles along the advancement direction and avoids slowdowns in processing due to the waiting of the profiles by the processing groups 9, 10.

Furthermore, this arrangement allows to avoid possible interruptions in the operation of the processing stations preceding and following the processing centre 1 and to avoid blockages in the handling group 3. Advantageously, the fixing group 9 and the drilling group 10 are arranged between the first extreme zone 6 and the second extreme zone 7. In essence, the processing groups 9, 10 are suitable to intervene on the profiles P when the latter are arranged on the handling group 3.

In detail, the fixing group 9 and the drilling group 10 are arranged between the loading zone 8 and the second extreme zone 7. In other words, the processing groups 9, 10 are designed to intervene on the P profiles following the insertion of the reinforcing bar in the respective base profile.

In accordance with the embodiment shown in the figures, the fixing group 9 is arranged upstream of the drilling group 10 with respect to the feed direction A.

This solution allows one or more holes to be obtained when the reinforcement bar is already fixed to the base profile, thus allowing extremely precise drilling not only on the base profile but also on the reinforcement bar. It is clear, in fact, that in the presence of the reinforcement bar, the various mechanical components that allow the opening/closing of the window must also be fixed to the reinforcement bar itself.

Advantageously, each of the fixing group 9 and the drilling group 10 comprises:

- a transverse frame 11 arranged above the movement group 3 and extending along a respective working direction W substantially parallel to the longitudinal direction L; and - at least one working device 12 associated with the transverse frame 11. The transverse frame 11 is arranged above the movement group 3 and the support bodies 5 are configured to pass underneath it along the feed direction A.

To carry out the machining, the machining device 12 is moved towards the support body 5 to intervene on the profile P, as will be better explained later in this document.

The fixing group 9 and the drilling group 10 are similar to each other in shape and arrangement with respect to the movement group 3 and differ from each other in the type of processing device 12.

Specifically, in accordance with the embodiment shown in the figures, the processing device 12 of the fastening group 9 is of the type of a screwing device, preferably powered by self-tapping screws. In accordance with an alternative embodiment not shown in detail in the figures, however, the processing device 12 of the fastening group 9 is of the type of an induction fastening device. Such an induction fastening device, for example, may be similar to the fastening means described in patent WO 2017/149460 A1.

The processing device 12 of the drilling unit 10, however, is of the type of a drill device with special twist drill bits. However, it cannot be excluded that the processing device 12 of the drilling unit 10 is of a different type.

Conveniently, the machining device 12 is slidably associated with the transverse frame 11 along the working direction W.

The processing device 12 can therefore be moved along the working direction W to position itself at predefined points on the profile P on which the processing is to be carried out.

For this purpose, the corresponding processing group 9, 10 comprises a movement unit 13 suitable for moving the processing device 12 along the working direction W.

The movement unit 13 comprises a guide unit 14 associated with the transverse frame 11 and extending parallel to the working direction W and an actuator system.

In accordance with the embodiment shown in the figures, the actuator system comprises a rack body 15 associated with the transverse frame 11 and extending parallel to the working direction W and a toothed wheel 16 associated with the working device 12, which is also provided with a motorized actuator 17 connected to the toothed wheel 16. The rotation of the toothed wheel 16 in both directions of rotation determines the movement of the working device 12 in both directions of the working direction W.

However, it cannot be ruled out that the actuator system is of a different type.

Advantageously, the processing device 12 comprises a support frame 18 associated with the transverse frame 11 and at least one processing tool 19 movably associated with the support frame 18.

The support frame 18 is slidably mounted on the guide unit 14. The working tool 19 is slidably associated with the support frame 18 along at least a first direction D1 substantially perpendicular to the working direction W and a second direction D2 substantially perpendicular to the first direction D1 and to the working direction W.

The machining tool 19 can therefore be moved along three Cartesian directions to position itself in correspondence with the profile P.

In detail, the first direction D1 is substantially horizontal and the second direction D2 is substantially vertical.

Movement along the first direction D1 therefore allows the working tool 19 to move closer/farther away from the cross frame 11, while movement along the second direction D2 allows the working tool 19 to move closer/farther away from the support body 5 and, consequently, from the profile P.

The processing device 12 comprises first guide members 20 associated with the support frame 18 and extending along the first direction D1 and second guide members 21, slidably associated with the first guide members 20, extending along the second direction D2 and slidingly supporting the processing tool 19.

The processing device 12 also comprises a pair of actuator members 22, each connected to a respective guide member 20, 21. The actuator member 22 is of a type known to those skilled in the art and, for example, may be of the type of a pneumatic cylinder or of the type of a motorized system equipped with a threaded shaft and a pinion.

Advantageously, at least one of the fastening group 9 and the drilling group 10 comprises a plurality of processing devices 12.

In this way, the relevant machining group 9, 10 is able to carry out machining on the P profile in multiple points simultaneously, allowing for a further reduction in times compared to known solutions.

At least one of the processing devices 12 comprises at least one detection device 23 capable of detecting the position of the profile P. In accordance with the embodiment shown in the figures, the detection device 23 comprises at least one optical distance sensor and is configured to detect at least the position of one of the ends of the profile P. Once the position of the end of the profile P has been detected, the processing devices 12 are moved relative to it along the guide unit 14.

Advantageously, each of the fixing group 9 and the drilling group 10 comprises positioning means 24 suitable for cooperating with the movement group 3 to position and lock the profile P.

The positioning means 24 allow the P profile to be kept still during fastening and drilling operations.

The positioning means 24 are associated with the base frame 2 and comprise:

- positioning organs 25, 26 designed to arrange the profile P in a predefined relative position; and

- locking organs 27, 28 designed to lock the profile P in the predefined position.

As explained above, the profile P is arranged to rest on the support surface 4. However, as is known to those skilled in the art, the profiles for window frames are characterised by irregular shapes, provided with numerous protruding and recessed portions defining the housings for the central panel and for the gaskets and which, once the window frame is closed, allow for optimal sealing against both air and water infiltration. Therefore, depending on the type of profile P, this lies on the support surface 4 in a position that is not always perfectly suitable for carrying out the fixing and drilling operations, i.e. with the areas to be worked facing the processing tool 19.

The positioning members 25, 26 are, therefore, configured to support the profile P, at least in correspondence with some portions of the same, so as to arrange it in the predefined position, in which the processing devices 12 can carry out the corresponding processing.

As shown in the figures, the positioning members 25, 26 comprise a plurality of parallelepiped-shaped bodies, arranged side by side parallel to the longitudinal direction L.

The positioning organs 25, 26 define a substantially horizontal support surface suitable, in use, to support the profile P.

Usefully, the positioning members 25, 26 comprise at least a series of first positioning members 25 suitable for contacting a respective first portion of the profile P and a series of second positioning members 26 suitable for contacting a respective second portion of the profile P.

The two portions have different profiles and the first positioning organs 25 and the second positioning organs 26 are arranged, in use, at different heights depending on these profiles (Figure 10).

Alternative implementation forms are not excluded in which the positioning organs include more than two series, depending on the shape of the profiles to be worked.

The positioning members 25, 26 can be moved along a substantially vertical positioning direction B between a rest position, in which they are arranged below the support surface 4, and a working position, in which they are arranged in correspondence with the support surface 4 and interact with the profile P.

In detail, in accordance with the embodiment shown in the figures, the support bodies 5 have a plurality of openings defined along the longitudinal direction L and configured to allow the passage of the positioning members 25, 26 between the rest position and the working position and, consequently, the interaction of the latter with the profile P. The support surface 4 is therefore of a discontinuous type at least along the longitudinal direction L.

In greater detail, in the rest position, the positioning members 25, 26 are moved away from the support surface 4 to allow the movement of the same between the first extreme zone 6 and the second extreme zone 7.

Usefully, the positioning means 24 comprise at least one movement system 29 capable of moving the positioning members 25, 26 between the rest position and the working position (Figures 7 and 8).

The positioning means 24 also comprise at least one adjustment system 30 suitable for regulating the reciprocal position of the positioning members 25, 26 in the working position, depending on the shape of the profile P (Figure 9).

As previously described, the window profiles are provided with irregular shapes and, in addition to this, depending on the type of window or the portion of window (for example the fixed frame or the mobile sash) to be made, the P profiles to be machined can be of different types. It follows that the reciprocal position of the positioning organs 25, 26 must also be appropriately adjusted depending on the P profile to be machined.

Once the mutual position has been adjusted, the positioning members 25, 26 are moved simultaneously between the rest position and the working position. The adjustment system 30 will be described later in this paper.

The movement system 29 comprises a first support body 31 movably associated with the base frame 2 and supporting the first positioning members 25 and at least one first actuator 32 placed between the base frame 2 and the first support body 31. The movement system 29 also comprises first guides 33, extending parallel to the positioning direction B, associated with the base frame 2 and slidingly supporting the first support body 31.

The movement system 29 also comprises a second support body 34, movably associated with the first support body 31 and supporting the second positioning members 26 and at least one second actuator 35 placed between the first support body 31 and the second support body 34. Similarly to the above, the movement system 29 also comprises second guides 36, extending parallel to the positioning direction B, associated with the first support body 31 and slidingly supporting the second support body 34.

Each of the support bodies 31, 34 has a longitudinal development, extends parallel to the longitudinal direction L and comprises a pair of end portions 37.

In detail, each of the support bodies 31, 34 presents a planar development along a relative substantially vertical development plane.

The two support bodies 31, 34 are arranged substantially parallel to each other. The movement system 29 therefore comprises a pair of actuators 32, 35 for each of the support bodies 31, 34, each associated with a respective end portion 37. Similarly to the P profiles, in fact, each of the support bodies 31, 34 can have a considerable extension, up to three metres, and the presence of an actuator 32, 35 connected to each of the end portions 37 allows for easier and more uniform movement across the entire extension of the wall itself. Furthermore, the positioning means 24 also comprise at least one synchronisation system 38 associated with the support bodies 31, 34 and capable of synchronising the movement of the end portions 37 between the rest position and the working position (Figures 7 and 8).

The synchronization system 38 ensures a simultaneous movement of the extreme portions 37 and allows for easier movement of the relative wall 31, 34 and, at the same time, allows for correct arrangement of all the positioning organs 25, 26 in the working position.

The synchronization system 38 comprises a first connecting shaft 39 rotatably associated with the base frame 2 and extending parallel to the longitudinal direction L and first connecting members 40 associated with the first connecting shaft 39 and the first support body 31 at the respective end portions 37.

The first connecting members 40 comprise a connecting rod mechanism interposed between a respective end portion 37 and the first connecting shaft 39.

The first connecting shaft 39 is fixed to the base frame 2 and can rotate on itself following the movement of the first support body 31. Specifically, following the movement of each of the extreme portions 37 by means of the respective first actuator 32, the respective first connecting member 40 induces a rotation of the first connecting shaft 39, which transfers the motion to the opposing first connecting member 40 which, in turn, induces a movement of the respective extreme portion 37. In this way, any differences in the force exerted by the first actuators 32 are compensated by the synchronisation system 38.

The synchronization system 38 also comprises a second connecting shaft 41 rotatably associated with the second support body 34 and extending parallel to the longitudinal direction L and second connecting members 42 associated with the second connecting shaft 41 and the first support body 31 at their respective end portions 37.

Similarly to the first connecting members 40, the second connecting members 42 also comprise a connecting rod mechanism placed between a respective end portion 37 and the second connecting shaft 41. The second connecting shaft 41 is fixed to the second support body 34 and is integral with it in the movement along the positioning direction B.

The second connecting shaft 41 can be rotated on itself following the movement of the second support body 34.

Specifically, following the movement of each of the extreme portions 37 by means of the respective second actuator 35, the respective second connecting member 42 induces a rotation of the second connecting shaft 41, which transfers the motion to the opposing second connecting member 42 which, in turn, induces a movement of the respective extreme portion 37. In this way, any differences in the force exerted by the second actuators 35 are compensated by the synchronisation system 38.

As previously mentioned, the positioning means 24 also include an adjustment system 30.

The adjustment system 30 comprises at least one adjustment pin 43 movably associated with the second support body 34 along an adjustment direction R substantially parallel to the positioning direction B and at least one abutment surface 44 associated with the first support body 31 and suitable for receiving the adjustment pin 43 in abutment. The position of the adjustment pin 43 with respect to the second support body 34 defines the position of the latter with respect to the first support body 31.

In practice, the interaction between the adjustment pin 43 and the stop surface 44 defines a travel stop in the movement of the second support body 34 with respect to the first support body 31. In this way, in the working position, the first series of positioning members 25, 26 and the second series of positioning members 25, 26 are always arranged in the same reciprocal position.

Usefully, the 30 regulation system includes:

- at least one threaded shaft, not shown in detail in the figures, associated with the second support body 34, extending along the adjustment direction R and engaging the adjustment pin 43; and - actuator devices 45 suitable for rotating the threaded shaft, where the rotation of the threaded shaft determines the movement of the adjustment pin 43 along the adjustment direction R.

In detail, the rotation of the threaded shaft in both directions of rotation determines the movement of the adjustment pin 43 in both directions of the adjustment direction R.

The actuator devices 45 comprise at least one electric motor 46 associated with the second support body 34 and connected to the threaded shaft by means of a transmission system 47 provided with a plurality of toothed wheels and at least one belt wrapped around them.

The adjustment system 30 also includes a guide portion 48 suitable for guiding the sliding of the adjustment pin 43 along the adjustment direction R.

The guide portion 48 is defined on the second support body 34 and extends parallel to the adjustment direction R. In accordance with the embodiment shown in the figures, the guide portion 48 is of the slot type.

The adjustment pin 43 in turn comprises a reference portion 49 associated with the guide portion 48.

The abutment portion 49 is of the type of a protruding fin, is arranged across the guide portion 48 and can be moved within it along the adjustment direction R.

In accordance with the embodiment shown in the figures, the adjustment system 30 comprises a pair of adjustment pins 43 arranged in proximity to the end portions 37 of the second support body 34 and a pair of abutment surfaces 44 associated with the first support body 31. At the same time, the adjustment system 30 comprises a pair of related threaded shafts.

The electric motor 46 is connected to both threaded shafts via the transmission system 47.

Once positioned in the predefined position, the P profile is locked by means of the locking organs 27, 28 (Figures 10 and 11).

The locking members 27, 28 can be moved between a rest position, in which they are arranged below the support surface 4, and an operating position, in which they are arranged in correspondence with the support surface 4 and are able to contact the profile P.

In practice, in the rest position, the locking members 27, 28 are moved away from the support surface 4 to allow the movement of the support bodies 5 along the direction of advancement A.

Advantageously, the locking members 27, 28 comprise first locking members 27 defining a contact surface 50 extending parallel to the longitudinal direction L and suitable for receiving the profile P and second locking members 28, opposite to the first locking members 27 and suitable for pressing the profile P against the contact surface itself. The contact surface 50 is substantially orthogonal to the support surface 4.

The first locking members 27 are rotatably associated with the base frame 2 between the rest position and the operating position around a locking axis F substantially parallel to the longitudinal direction L.

The positioning means 24 comprise first actuator means 51 suitable for moving the first locking members 27 between the rest position and the operating position.

The first actuator means 51 comprise a series of pneumatic cylinders interposed between the base frame 2 and the respective first locking members 27. The second locking members 28 can be moved between an active position, in which they are moved away from the contact surface 50, and the operating position, in which they are moved closer to the contact surface 50 and press the profile against the contact surface itself.

The second locking members 28 comprise a plurality of elongated elements arranged side by side along the longitudinal direction L.

Analogously to the positioning members 25, 26, in the active position, the second locking members 28 are arranged across the openings of the support bodies 5.

In the operating position, furthermore, each of the second locking members 28 is interposed between two adjacent positioning members 25, 26. For this purpose, the positioning members 25, 26 are arranged side by side at a distance greater than the width of the second locking member 28.

Usefully, the 24 positioning means comprise:

- a support shaft 52 supporting the second locking members 28 and operable in rotation around a working axis G to move the second locking members 28 between the active position and the operating position; and

- second actuator means 53 associated with the support shaft 52 and suitable for rotating the latter.

The support shaft 52 extends along the longitudinal direction L and the second locking members 28 extend transversely to it.

The second actuator means 53 comprise a pair of pneumatic actuators rotatable to the second support body 34 and which are connected to the support shaft 52 by means of a lever system.

The positioning means 24 also include shock absorbing members, of the spring type, placed between the second locking members 28 and the support shaft 52 and capable of cushioning the force exerted by the second locking members themselves on the profile P.

Usefully, the support shaft 52 is associated with the second support body 34 and the second actuators 35 are further adapted to move the second locking members 28 between the rest position and the active position.

In practice, it has been found that the described invention achieves the proposed purposes and in particular it is highlighted that the machining centre for window and door profiles according to the invention allows the execution of the operations of fixing a reinforcing bar and drilling the profiles to be made extremely efficient.

Furthermore, this processing center allows for a significant reduction in the processing and production times of the windows and doors.

In particular, these objectives are achieved thanks to the presence of processing groups directly associated with the movement group along the direction of advancement.

Claims (21)

1) Machining centre (1) for window and door profiles characterised by the fact that it includes: - at least one base frame (2) intended to be placed on the ground; - at least one movement group (3) associated with said base frame (2) and capable of receiving a plurality of window and door profiles (P) and moving them along a direction of advance (A), in which each of said profiles (P) extends along a respective longitudinal axis and is provided with a base profile and a reinforcement bar arranged internally to said base profile, said movement group (3) comprising a plurality of support surfaces (4) each extending along a relative longitudinal direction (L) transverse to said direction of advance (A), capable of longitudinally supporting a respective profile (P) and moveable along said direction of advance (A); - at least one working group (9, 10) associated with said base frame (2) and suitable for fixing said reinforcing bar to said base profile and for obtaining at least one hole on said profile (P); where said at least one processing group (9, 10) is mounted above said movement group (3). 2) Machining centre (1) according to claim 1, characterised in that said support surfaces (4) define a substantially horizontal work surface and in that said at least one working group (9, 10) is arranged above said work surface. 3) Machining centre (1) according to one or more of the preceding claims, characterised in that it comprises at least two of said machining groups (9, 10) each associated with said movement group (3) and comprising: - a fixing group (9) suitable for fixing said reinforcing bar to said base profile; and - a drilling group (10) designed to make at least one hole on said profile (P). 4) Machining centre (1) according to one or more of the preceding claims, characterised in that said fixing group (9) and said drilling group (10) are arranged in succession with respect to each other along said feed direction (A). 5) Machining centre (1) according to one or more of the preceding claims, characterised in that said movement group (3) extends along said direction of advancement (A) between a first extreme zone (6) configured to receive said base profiles and a second extreme zone (7) configured to move away said machined profiles (P), said fixing group (9) and said drilling group (10) being arranged between said first extreme zone (6) and said second extreme zone (7). 6) Machining centre (1) according to one or more of the preceding claims, characterised in that said movement group (3) comprises a loading area (8) in which said reinforcement bars are inserted into the respective base profiles, said fixing group (9) and said drilling group (10) being arranged between said loading area (8) and said second extreme area (7). 7) Machining centre (1) according to one or more of the preceding claims, characterised in that each of said fixing group (9) and said drilling group (10) comprises: - a transverse frame (11) arranged above said movement group (3) and extending along a respective working direction (W) substantially parallel to said longitudinal direction (L); and - at least one processing device (12) associated with said cross frame (11). 8) Machining centre (1) according to one or more of the preceding claims, characterised in that said machining device (12) is slidably associated with said transverse frame (11) along said working direction (W). 9) Machining centre (1) according to one or more of the preceding claims, characterised in that said machining device (12) comprises a support frame (18) associated with said transverse frame (11) and at least one machining tool (19) slidably associated with said support frame (18) along at least a first direction (D1) substantially perpendicular to said working direction (W) and a second direction (D2) substantially perpendicular to said first direction (D1) and to said working direction (W). 10) Machining centre (1) according to one or more of the preceding claims, characterised in that at least one of said fastening group (9) and said drilling group (10) comprises a plurality of said machining devices (12). 11) Machining centre (1) according to one or more of the preceding claims, characterised in that at least one of said machining devices (12) comprises at least one detection device (23) suitable for detecting the position of said profile (P). 12) Machining centre (1) according to one or more of the preceding claims, characterised in that each of said fixing group (9) and said drilling group (10) comprises positioning means (24) suitable for cooperating with said movement group (3) to block said profile (P), said positioning means (24) comprising: - positioning organs (25, 26) capable of placing said profile (P) in a relative predefined position; and - locking organs (27, 28) suitable for locking said profile (P) in said predefined position. 13) Machining centre (1) according to one or more of the preceding claims, characterised in that said positioning members (25, 26) comprise at least a series of first positioning members (25) suitable for contacting a respective first portion of said profile (P) and a series of second positioning members (26) suitable for contacting a respective second portion of said profile (P). 14) Machining centre (1) according to one or more of the preceding claims, characterised in that said positioning members (25, 26) can be moved along a substantially vertical positioning direction (B) between a rest position, in which they are arranged below said support surface (4) and a working position, in which they are arranged in correspondence with said support surface (4) and interact with said profile (P). 15) Machining centre (1) according to one or more of the preceding claims, characterised in that said positioning means (24) comprise: - at least one movement system (29) suitable for moving said positioning organs (25, 26) between said rest position and said working position; - at least one adjustment system (30) suitable for regulating the reciprocal position of said positioning organs (25, 26) in said working position, depending on the shape of said profile (P). 16) Machining centre (1) according to one or more of the preceding claims, characterised in that said movement system (29) comprises: - a first support body (31) movably associated with said base frame (2) and supporting said first positioning organs (25) and at least one first actuator (32) interposed between said base frame (2) and said first support body (31); and - a second support body (34), movably associated with said first support body (31) and supporting said second positioning organs (26) and at least one second actuator (35) interposed between said first support body (31) and said second support body (34). 17) Machining centre (1) according to one or more of the preceding claims, characterised in that each of said support bodies (31, 34) extends parallel to said longitudinal direction (L) and comprises a pair of end portions (37) and in that said positioning means (24) comprise at least one synchronisation system (38) associated with said support bodies (31, 34) and capable of synchronising the movement of said end portions (37) between said rest position and said working position. 18) Machining centre (1) according to one or more of the preceding claims, characterised in that said synchronisation system (38) comprises: - a first connecting shaft (39) rotatably associated with said base frame (2) and extending parallel to said longitudinal direction (L) and first connecting members (40) associated with said first connecting shaft (39) and said first support body (31) at their respective end portions (37); and - a second connecting shaft (41) rotatably associated with said second support body (34) and extending parallel to said longitudinal direction (L) and second connecting members (42) associated with said second connecting shaft (41) and said first support body (31) at their respective end portions (37). 19) Machining centre (1) according to one or more of the preceding claims, characterised in that said adjustment system (30) comprises at least one adjustment pin (43) movably associated with said second support body (34) along an adjustment direction (R) substantially parallel to said positioning direction (B) and at least one abutment surface (44) associated with said first support body (31) and suitable for receiving said adjustment pin (43) in abutment, where the position of said adjustment pin (43) with respect to said second support body (34) defines the position of the latter with respect to said first support body (31). 20) Machining centre (1) according to one or more of the preceding claims, characterised in that said locking members (27, 28) can be moved between a rest position, in which they are arranged below said support surface (4), and an operating position, in which they are arranged in correspondence with said support surface (4) and are able to contact said profile (P). 21) Machining centre (1) according to one or more of the preceding claims, characterised in that said locking members (27, 28) comprise first locking members (27) defining a contact surface (50) extending parallel to said longitudinal direction (L) and suitable for receiving said profile (P) and second locking members (28), opposite said first locking members (27) and suitable for pressing said profile (P) against the contact surface itself.