Individualization feeding system for controlled separation of elongated workpieces
Patent Information
- Application Number
- CN202610506459.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2025-04-17
- Filing Date
- 2026-04-16
- Publication Date
- 2026-10-23
Smart Images
Figure CN122957601A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of machines for processing long workpieces such as tubes, profiles, or bars. Specifically, this invention relates to a single-piece feeding system for the controlled separation of long workpieces. Background Technology
[0002] Known modular systems for the controlled separation of elongated workpieces include oscillating structures for transferring elongated workpieces from a storage bin to a processing machine. Summary of the Invention
[0003] The purpose of this invention is to improve upon existing technologies. In particular, there is a need to develop a single-piece loading system capable of handling a wide variety of long workpieces in terms of size (larger or smaller cross-sections), cross-sectional shape (e.g., circular or rectangular cross-sections, solid or hollow cross-sections, open or closed cross-sections), and material (e.g., steel or aluminum).
[0004] This and other objectives are fully achieved by the single-piece feeding system according to the invention.
[0005] In short, this invention is based on the concept of providing a single-piece feeding system for the controllable separation of multiple long workpieces, the system comprising: The system includes a receiving support and a lifting device. The receiving support is configured to receive multiple elongated workpieces, and the lifting device is configured to lift the elongated workpieces housed in the receiving support. The conveying plane has an end adjacent to the upper edge of the receiving bracket. The single-piece feeding system also includes: At least one vibrating component is mounted on at least one of the housing support and the lifting device, the at least one vibrating component being operable to apply controllable vibration to an elongated workpiece housed in the housing support. An image acquisition device is aligned with a receiving bracket and a conveying plane. This image acquisition device is capable of acquiring a sequence of images of an elongated workpiece in the receiving bracket, wherein the corresponding front end of the elongated workpiece is visible in the image sequence. An electronic processing device is arranged to process the aforementioned image sequence, and A control device, coupled to an electronic processing device, is arranged to actuate at least one vibrating member based on the aforementioned image sequence.
[0006] Such systems facilitate the movement / repositioning of workpieces within a receiving support, particularly when the workpieces are made of a material with a relatively high coefficient of friction, in which case it may be difficult for the workpieces to slide against each other or against the material of the receiving support. Specifically, when friction between workpieces makes transfer relying solely on the tilting of the receiving support difficult, such systems can control the transfer of the workpieces from the receiving support to the transfer plane. Attached Figure Description
[0007] Other features and advantages of the invention will become more apparent from the following detailed description by way of non-limiting example with reference to the accompanying drawings, in which: Figure 1 and Figure 2 These are perspective views of the modular feeding system according to the present invention, observed from different viewpoints. Figures 3 to 5 It shows Figure 1 The side elevation view of the single-piece feeding system shows the swing structure in the vertical position, the forward tilting position, and the backward tilting position, respectively. Figures 6 to 11 yes Figure 1 Enlarged view of the details of the modular feeding system, showing the drive components in different operating positions; Figures 12 to 14 This is a photograph of the display of a single-piece feeding system, showing the continuous movement steps of a tubular workpiece with a wide, circular cross-section; and Figures 15 to 17 It is a photograph of the display of a single-piece feeding system, showing the continuous movement steps of a tubular workpiece with an elongated and circular cross-section. Detailed Implementation
[0008] Figures 1 to 5 With 3D diagram ( Figure 1 and Figure 2 ) and side view ( Figures 3 to 5 This illustrates a single-piece feeding system 10. Figures 3 to 5 In the diagram, the individual workpiece loading system 10 is shown in combination with a conveying device C (described below) for transferring elongated workpieces to a processing machine (not shown). On the side opposite the conveying device, a pick-up system (not shown) is conventionally provided for transferring elongated workpieces from a storage area (not shown) to the individual workpiece loading system 10. In the following description, spatial terms such as "front" and "rear" are used with reference to the direction in which the elongated workpiece is transferred from the storage area to the processing machine, i.e., according to... Figures 3 to 5The diagram is shown from right to left. In other words, the front side of the single-piece feeding system 10 faces the conveyor / processing machine and is the side from which the long workpiece exits, while the rear side faces the storage area and is the side from which the long workpiece enters. The long workpiece can be, for example, a tubular workpiece, a bar, or a profile with an open or closed cross-section.
[0009] The modular feeding system 10 may include a fixed support structure 11 and a swing structure (also referred to as the tilting structure) 12 supported by the support structure 11. The axis of rotation of the swing structure 12 relative to the support structure 11 about it may be represented by x.
[0010] The single-piece loading system 10 also includes a receiving bracket 13 and a lifting device 14. In the illustrated example, the receiving bracket and the lifting device are supported by a swing structure 12. The receiving bracket 13 is configured to receive multiple elongated workpieces P, such as... Figures 6 to 11 As shown. The lifting device 14 is configured to lift the elongated workpiece P housed in the receiving bracket 13. In the example shown, the receiving bracket 13 includes a bottom 13a; a side 13b defining the receiving bracket 13 at the rear; and a wall 13c of the swing structure 12 defining the receiving bracket 13 at the front. In the example shown, the bottom 13a and the side 13b of the receiving bracket 13 are formed by a lattice structure (see...). Figure 1 and Figure 2 Furthermore, the lifting device 14 is connected to the receiving bracket 13 so that the movable portion of the receiving bracket 13 (i.e., the bottom 13a and the rear side 13b) can move along the wall 13c of the swing structure 12. Figures 3 to 5 Translation in the direction indicated by arrow z. According to an alternative embodiment not shown, the receiving bracket 13 may be fixed relative to the swing structure 12. In this case, the lifting device 14 may include a movable bottom platform disposed inside the receiving bracket 13.
[0011] According to other embodiments, the single-piece feeding system may not have the aforementioned swing structure, and the housing support and lifting device may be supported by a movable or fixed structure.
[0012] The modular feeding system 10 also includes a conveying plane 15, which, in the illustrated example, is supported by a swing structure 12. The conveying plane 15 has an end adjacent to the upper edge 13c' of the receiving bracket 13 (i.e., the upper edge of the wall 13c of the swing structure 12). In the illustrated example, the conveying plane is orthogonal to the front portion of the receiving bracket 13, i.e., orthogonal to the wall 13c of the swing structure 12.
[0013] According to other embodiments without the aforementioned swing structure, the transmission plane may be supported by a movable or fixed structure that carries the support bracket, or by another movable or fixed structure.
[0014] The conveying plane 15 may include at least one drive member 16, such as a drive tooth, which is arranged to be movable along the conveying plane 15 in the conveying direction y, such that an elongated workpiece lifted by the lifting device 14 over the upper edge 13c' of the housing bracket 13 and reaching the conveying plane 15 can be conveyed along the conveying plane 15 in a controlled manner.
[0015] In the example shown, the oscillating structure 12 is formed by multiple modules arranged side-by-side along the length of the modular feeding system 10. This configuration allows the modular feeding system 10 to be configured according to the length of the elongated workpiece to be processed by the system.
[0016] The modular feeding system 10 also includes an actuation mechanism 17 for rotatably actuating the oscillating structure 12. The actuation mechanism 17 includes a continuous motion actuator or a stepping actuator. In the illustrated example, the actuation mechanism is a rack and pinion mechanism 17 and includes: an arcuate rack 17a integrally formed with one of the support structure 11 and the oscillating structure 12 (in the illustrated example, the arcuate rack 17a is integrally formed with the support structure 11); and a motorized pinion 17b that engages the arcuate rack 17a and is supported by the other of the support structure 11 and the oscillating structure 12 (in the illustrated example, the motorized pinion 17b is supported by the oscillating structure 12). The arcuate rack 17a extends concentrically with the axis of rotation x of the oscillating structure 12.
[0017] If it is possible Figure 3 As observed, the projection of the rotation axis x onto the horizontal plane is preferably arranged in the central region m, which is located between the projection A of the foremost point of the swing structure 12 in its vertical position onto the horizontal plane and the projection B of the rearmost point of the swing structure 12 in its vertical position onto the horizontal plane. In the vertical position, the conveying plane 15 is arranged horizontally. For example, Figure 3 For the structure shown in the vertical position, the "central region" refers to the region centered on the midpoint O between projection A and projection B, and whose range is less than the distance between projection A and projection B on the horizontal plane projected by the pivot axis x. This range is, for example, equal to half the distance between projection A and projection B.
[0018] On the one hand, the swing structure 12 can Figure 3 The vertical position and Figure 4 The structure can rotate between the forward tilt positions shown. In the forward tilt position, the conveying plane 15 is tilted and positioned below the upper edge 13c' of the receiving bracket 13. On the other hand, the swing structure can rotate between the vertical position and the horizontal position. Figure 5The device rotates between the shown backward tilt positions, in which the conveying plane 15 is tilted and positioned above the upper edge 13c' of the receiving bracket 13. In other words, the swing structure 12 is capable of swinging along an arcuate trajectory centered on the rotation axis x, wherein the point corresponding to the vertical position in this arcuate trajectory is positioned at a height higher than the points corresponding to the limits achievable in the forward and backward tilt positions. These limit points may, for example, correspond to forward tilt angles of +60° and greater, and backward tilt angles of -20° and greater, respectively, measured relative to the vertical direction.
[0019] The actuation mechanism 17 is configured such that the swing structure 12 can be positioned in multiple forward tilt positions and multiple backward tilt positions. In other words, the swing structure 12 is not only moved from its vertical position to a single forward tilt position (and vice versa) or from its vertical position to a single backward tilt position (and vice versa), but is also able to move between multiple intermediate positions between the two extreme positions, depending on (as will be explained below) the type of elongated element to be processed and the specific processing conditions.
[0020] exist Figures 3 to 5 In the diagram, the modular loading system 10 is shown in combination with a conveyor C for transferring long workpieces to a processing machine (not shown). In the example shown, the conveyor C is formed by multiple conveyor modules arranged side-by-side along the length of the modular system 10. Figure 4 In this configuration, the oscillating structure 12 is in the transfer position. This means that the oscillating structure 12 and the receiving bracket 13 have rotated at a certain angle relative to the horizontal direction, allowing the lifting device 14 to push a certain number of elongated workpieces past the upper edge 13c' of the receiving bracket 13 and onto the forward-inclined conveying plane 15. By adjusting the rotational angle of the oscillating structure 12, adjusting the translational motion of the lifting device 14 relative to the oscillating structure 12, and adjusting the translational motion of the drive member 16 relative to the conveying plane 15, the number of workpieces to be separated can be precisely adjusted. Figure 4In the transfer position, the forward-inclined conveying plane 15 intersects with the horizontal conveying plane defined by the conveying device C and formed by an annular conveying member (e.g., a belt or chain). When one or more workpieces to be fed to the processing machine are located on the forward-inclined conveying plane 15 and supported on the drive member 16, the movement of the drive member 16 toward the conveying device C allows one or more workpieces to fall along the inclined conveying plane 15 at a speed controllable by the movement of the drive member 16 until they reach the horizontal conveying plane of the conveying device C. The inclined conveying plane 15 is arranged relative to the horizontal conveying plane of the conveying device C such that after the drive member 16 has translated along the conveying plane 15 and passed a certain point, the drive member 16 is completely below the horizontal conveying plane of the conveying device C, thereby allowing one or more workpieces conveyed on the horizontal conveying plane of the conveying device C to pass through.
[0021] refer to Figures 6 to 11 The drive member 16 is fastened to the annular transfer member 16a, such as a chain, which is then driven between the drive gear 16b and the driven gear 16c. The drive gear is further actuated by a motor (not shown). The upper section of the annular transfer member 16a is arranged parallel to and slightly below the transfer plane 15. The annular transfer member 16a allows the drive member 16 to translate along the transfer plane 15. When the translational direction of the annular transfer member 16a and the translational direction of the drive member 16 are oriented away from the upper edge 13c' of the receiving bracket 13, this movement causes the workpiece P arranged on the transfer plane 15 to move together, as described above. However, the translational directions of the annular transfer member 16a and the drive member 16 can also be reversed to be oriented towards the upper edge 13c' of the receiving bracket 13, as... Figure 7 As shown, this is especially true when it is necessary to transfer workpieces P arranged on the conveying plane 15 into the receiving bracket 13. Advantageously, the drive member 16 can reach an extreme position in which it protrudes beyond the upper edge 13c' of the receiving bracket 13. This arrangement facilitates the transfer of workpieces P into the receiving bracket 13. Furthermore, if friction between workpieces prevents a single workpiece from sliding out of a stockpile contained in the receiving bracket 13 and raised to a height such that the first layer of workpieces exceeds the upper edge 13c' of the receiving bracket 13, applying a reciprocating motion to the drive member 16 protruding toward the receiving bracket 13 may help move such workpieces.
[0022] Figure 8 It is shown that when a portion of the constraint drive member 16 of the annular transfer member 16a passes the gear 16c closest to the horizontal transport plane of the transfer device C, the drive member flips forward. This flipping causes the drive member 16 to lower below the horizontal transport plane of the transfer device C, thereby preventing the drive member 16 from interfering with the workpiece P being transported on the transport plane.
[0023] refer to Figures 9 to 10 The drive member 16 is equipped with an adjustable support element 16d, which is mounted on the drive member 16 to provide a support surface 16d' to the elongated workpiece P. The inclination of this support surface relative to the conveying plane 15 is adjustable. In the illustrated embodiment, this inclination is manually adjustable, but in other embodiments, this adjustment can also be motorized. This method helps to avoid... Figure 9 The illustrated scenario involves multiple workpieces supported one on top of the other on the drive member 16. This is undesirable as it hinders the controlled separation of the elongated workpiece P. By adjusting the inclination of the support element 16d to compensate for the inclination of the transfer plane 15, the support surface 16d' can be made vertical or slightly overhanging, thus preventing multiple elongated workpieces P from being stacked one on top of another.
[0024] refer to Figure 11 The actuator 16e, also supported by the swing structure 12, is provided with a blocking element 16f, which is inclined relative to the transport plane 15 and can extend or retract relative to the actuator 16e. The blocking element 16f is arranged such that it protrudes beyond the transport plane 15 when in the extended position. The actuator 16e can be actuated to form an inclined barrier on the transport plane 15. In this way, when multiple elongated workpieces P are supported one on top of the other on the drive member 16, if the drive member 16 moves until the position of the multiple elongated workpieces intersects with the position of the blocking element 16f, the inclined barrier causes the workpieces positioned above to fall, and these workpieces are then positioned adjacent to each other and no longer abut against the drive member 16 one on top of the other.
[0025] The single-piece loading system 10 also includes multiple vibrating components 18 mounted on the receiving bracket 13 and / or the lifting device 14, operable to apply controlled vibration to the elongated workpiece housed in the receiving bracket 13. Using such vibrating components can facilitate the movement / repositioning of workpieces within the receiving bracket, particularly when the workpieces are made of a material with a relatively high coefficient of friction, in which case the workpieces may have difficulty sliding against each other or against the material of the receiving bracket 13. For example, if the workpiece housed in the receiving bracket 13 is a square or rectangular cross-section aluminum tube, the friction between the tubes may make it difficult for a single tube to slide out of the stockpile housed in the receiving bracket 13 and raised so that the first layer of tubes exceeds the height of the upper edge 13c' of the receiving bracket 13. If controlled vibration is applied to the receiving bracket 13 and / or the lifting device 14, this vibration is transmitted to the tubes, causing the first workpiece in the stockpile to detach and become supported on the drive member 16. The inclination of the swing structure 12 must be adjusted large enough to make the vibrating components effective, but not too large to avoid multiple tubes detaching together. More specifically, in order to overcome static friction using only gravity, a very large tilt angle would be required, which could cause multiple workpieces to fall as a whole: applying controlled vibration allows static friction to be overcome at a smaller angle, thus making the feeding of the tube smoother.
[0026] The modular loading system 10 includes a control system, particularly an artificial intelligence-based control system. At the input level, this control system includes an image acquisition device 20, such as a camera, aligned with the receiving support 13 and the transfer plane 15. In the illustrated example, the image acquisition device 20 is integral with the oscillating structure 12. The image acquisition device 20 is adapted to acquire a time-varying sequence of images (e.g., video) of the elongated workpiece P in the receiving support 13 and on the transfer plane 15 during its transfer from the receiving support 13 to the transfer plane 15. The image acquisition device 20 is positioned such that the front end of the elongated workpiece P is visible in the image sequence. For example, the image acquisition device 20 is positioned at one end of the oscillating structure 12.
[0027] refer to Figure 1The control system of the individual loading system 10 also includes an electronic processing unit 30, specifically an electronic processing unit with artificial intelligence, which includes a graphics processing unit and is configured to receive input image sequences and assign sequence tags to the elongated workpieces P based on their position and the probability of their arrival at the conveyor plane 15. This probability is calculated and updated in real time based on parameters such as the type and material of the elongated workpiece P, the position of the elongated workpiece P in the receiving support and on the conveyor plane, the position of the elongated workpiece P relative to each other, and the position of the moving parts of the individual loading system 10. The electronic processing unit 30, coupled to the image acquisition device 20, processes the dynamic images in real time and can perform frontal analysis of the entire stack of workpieces, including counting the workpieces, measuring and verifying the cross-sections of the workpieces, and measuring the position of the workpiece heads in the image sequence. This allows verification of the number of workpieces on the drive member 16 and whether the workpieces are accurately supported on the drive member 16 during conveying / moving together. In particular, the movement of the elongated workpiece P along the entire conveyor plane 15 can be tracked and monitored. This is particularly useful in the case of, for example, compact and relatively flexible elongated workpieces, as such workpieces may not be able to rigidly follow the drive member 16 during its movement.
[0028] The electronic processing device 30 is coupled to a control device 40 (e.g., a PLC), which is arranged to control the movement of the oscillating structure 12, the lifting device 14, and / or the drive member 16 based on the position of the elongated workpiece relative to the conveying plane 15 and the drive member 16 in the acquired image sequence (or, in one embodiment, based on the position of the sequence label). The control device 40 is also configured to control the vibrating member 18.
[0029] The processing and control unit operates based on an artificial intelligence algorithm. The first function of this algorithm is to collect data from various tests during the learning process, which are conducted using workpieces of different diameters, shapes, and materials under different stacking conditions in the housing support 13.
[0030] The acquired data is then processed and analyzed by artificial intelligence. In this data processing step, the software acquires the information and data needed to complete subsequent steps (i.e., decision-making steps).
[0031] In the decision-making step, the software compares and correlates the input data with the data existing in the database stored in the system, and determines the action.
[0032] Figures 12 to 17 These are photos of monitor 50, showing real-time video of an example of a single-piece processing procedure applied to a set of large-diameter tubes. Figures 12 to 14 Real-time video of an example of a single-piece processing procedure applied to a set of smaller diameter tubes. Figures 15 to 17 ).
[0033] In these photographs, the left pane of display 50 shows the control area, which includes the receiving bracket 13 and the transfer plane 15 with the drive member 16. As can be seen in the figures, the corresponding front end of the elongated workpiece P is shown from the front and drawn in a corresponding square. The processing system assigns a corresponding sequence label to each tracked end / tube based on the position of each tracked end / tube and the probability of reaching the transfer plane 15. Thus, the tube closest / with the highest probability is assigned the label "0", and the other tubes in the receiving bracket 13 are assigned corresponding incremental labels: "1", "2", and so on. The right pane of display 50 shows the geometric reconstruction of the monitored element: the front wall 13c and its upper edge 13c' of the receiving bracket 13, the bottom surface of the receiving bracket 13 or the bottom surface of the lifting device 14, the tube profile, the transfer plane 15, and the drive gear 16. In the photographs, the tilt of the oscillating structure 12 is imperceptible because, as mentioned above, in the illustrated embodiment, the camera 20 is integral with the oscillating structure 12, and therefore, the image reference frame is integral with the oscillating structure.
[0034] Figure 12 and Figure 13 The image shows the receiving support 13 being raised to bring a portion of the stacked tubes therein to a height above the transport plane 15. Between images, the labels on the individual tubes can be changed accordingly.
[0035] Figure 13 This illustrates how bringing the first layer of tubes completely above the height of the conveying plane 15 disrupts the balance of the material pile. Consequently, due to the tilt of the oscillating structure 12, the workpiece tends to fall into the portion of the conveying plane 15 defined by the drive member 16, which is positioned at a distance less than the diameter of a single tube from the upper edge 13c' of the receiving support 13.
[0036] Figure 14 The diagram illustrates how a single workpiece is dropped onto and rolls / slides along a conveyor plane 15 by retracting the drive member 16, during which the single workpiece moves together with the drive member 16. Simultaneously, other workpieces are moved away from the conveyor plane 15 by lowering the receiving bracket 13.
[0037] In another example, Figure 15 and Figure 16The illustration shows the receiving support 13 being raised to bring a portion of the stacked tubes above the height of the conveying plane 15, thus disrupting the balance of the stack. Due to the tilt of the oscillating structure 12, some workpieces fall into the portion of the conveying plane 15 defined by the drive teeth 16, positioned at a distance from the upper edge 13c' of the receiving support 13 equal to several times the diameter of a single tube. This allows longer, relatively flexible tubes, and thus potentially exhibiting a certain tendency to entangle, to be arranged in series, parallel to each other, abutting against the drive member 16.
[0038] Figure 17 It is shown that by moving the drive member 16 toward the upper edge 13c' of the receiving bracket 13, all workpieces on the transfer plane 15 except for one workpiece are pushed back into the receiving bracket 13.
[0039] If it is impossible to arrange the workpieces on the conveying plane 15 due to excessive winding of the workpieces in the receiving bracket 13, the control system may decide to return all workpieces to the receiving bracket 13 and actuate the motor of the swing structure 12 to swing the workpieces forward and backward in a reciprocating manner, thereby reordering the tubes.
[0040] After the reordering is complete, single-piece assembly can then be attempted.
[0041] The single-piece loading system 10 may include additional image acquisition devices located in different positions to increase the amount of information acquired and evaluate the optimal strategy for improving single-piece loading efficiency. For example, in the illustrated embodiment, a second image acquisition device 60 is provided (only in...). Figure 1 As shown in the figure, it is suitable for acquiring a sequence of side images (time-varying side image sequence, such as video) of an elongated workpiece P. In the side image sequence acquired by the second image acquisition device 60, the corresponding side surface of the elongated workpiece P is visible.
[0042] In the described example, only some of the possible optimization strategies for single-piece feeding are shown; however, it is clear that the system applied to the described oscillating structure and based on artificial intelligence image processing can identify alternative optimization strategies and select the best optimization strategy according to specific operating conditions, thereby creating a database of these strategies. This enhances the system's learning ability so as to continuously improve processing efficiency.
[0043] For example, the system can allow for the efficient management of the possibility of loading non-conforming elongated workpieces, and in practice, whenever a non-conforming elongated workpiece is at the top of the stockpile, the non-conforming elongated workpiece is recursively removed into the receiving rack 13 in an appropriate manner so that only conforming elongated workpieces are loaded and non-conforming workpieces are left in the receiving rack 13.
Claims
1. A modular feeding system for controllable separation of long workpieces, the modular feeding system comprising: A receiving bracket (13) and a lifting device (14) are provided, the receiving bracket (13) being configured to receive a plurality of elongated workpieces (P), and the lifting device (14) being configured to lift the elongated workpieces (P) housed in the receiving bracket (13). The conveying plane (15) has an end (15a) adjacent to the upper edge (13c') of the receiving bracket (13). The feature is that the single-piece feeding system further includes: At least one vibrating member (18) is mounted on at least one of the receiving bracket (13) and the lifting device (14), the at least one vibrating member (18) being operable to apply controllable vibration to the elongated workpiece (P) housed in the receiving bracket (13). The image acquisition device (20) is aligned with the receiving bracket (13) and the conveying plane (15). The image acquisition device (20) is capable of acquiring an image sequence of the elongated workpiece (P) in the receiving bracket (13), wherein the corresponding front end of the elongated workpiece (P) is visible in the image sequence. An electronic processing device (30) is arranged to process the image sequence, and A control device (40) is coupled to the electronic processing device (30) and arranged to actuate the at least one vibrating member (18) based on the image sequence.
2. The single-piece feeding system according to claim 1 further includes: Support structure (11). The swing structure (12), supported by the support structure (11) and capable of rotating relative to the support structure, wherein the receiving bracket (13) and the lifting device (14) are carried by the swing structure (12). The swing structure (12) is rotatable between a vertical position and a forward tilt position. In the vertical position, the conveying plane (15) is arranged horizontally, and in the forward tilt position, the conveying plane (15) is tilted and arranged below the upper edge (13c') of the receiving bracket (13).
3. The single-piece feeding system according to claim 2, wherein, The swing structure (12) can also rotate between the vertical position and the backward tilt position, in which the conveying plane (15) is tilted and arranged above the upper edge (13c') of the receiving bracket (13).
4. The single-piece feeding system according to claim 3, wherein, The swing structure (12) can follow an arc trajectory centered on the rotation axis (x) of the swing structure (12), and wherein the point corresponding to the vertical position in the arc trajectory is arranged at a height higher than the point corresponding to the limit that the swing structure (12) can reach when it is in the forward tilt position and the backward tilt position.
5. The single-piece feeding system according to any one of the preceding claims, wherein, The conveying plane (15) includes at least one drive member (16) arranged to move along the conveying plane (15) in the conveying direction, such that the elongated workpiece (P) lifted by the lifting device (14) over the upper edge (13c') of the receiving bracket (13) and reaching the conveying plane (15) can be conveyed along the conveying plane (15) in a controlled manner.
6. The single-piece feeding system according to claim 5, wherein, The drive member (16) is equipped with an adjustable support element (16d) mounted on the drive member (16) to provide a support surface (16d') to the elongated workpiece (P), the inclination of which is adjustable relative to the conveying plane (15).
7. The single-piece feeding system according to claim 5 further includes an actuator (16e) carried by the swing structure (12), the actuator being provided with a blocking element (16f), the blocking element being inclined relative to the conveying plane (15) and capable of extending or retracting relative to the actuator (16e), wherein, The blocking element (16f) is arranged such that when in the extended position, the blocking element protrudes beyond the conveying plane (15).
8. The single-piece feeding system according to any one of the preceding claims, wherein, The conveying plane (15) is orthogonal to the front side (13c) of the receiving bracket (13).