Straightening guide structure self-adaptive to profile wall thickness change

Abstract

The invention relates to the technical field of different-thickness plate processing, in particular to a straightening guide structure self-adaptive to profile wall thickness change, which is mounted at an inlet of straightening equipment, is used for guiding a blank for forming a variable-wall-thickness profile, and comprises a bearing plate and a plurality of guide units arranged on the bearing plate at intervals along the advancing direction of the blank, the guide unit comprises guide parts oppositely arranged on the two sides of a blank advancing path, and a limiting space matched with the blank in width is formed between the guide parts. Multi-point distribution constraint is carried out on the blanks through the multiple guide units arranged at intervals in the advancing direction, all the units independently respond to thickness alternating changes of the blanks in the length direction, the blanks are kept in the centering posture in the whole stroke, and the guide pieces on the two sides are forced by the synchronizing mechanism to do equidistant reverse mirror image motion; the center line of the blank coincides with the center line of an inlet of straightening equipment, and deviation and torsion are reduced.

Description

Technical Field

[0001] This invention relates to the field of differential thickness plate processing technology, and in particular to a straightening and guiding structure that adapts to changes in profile wall thickness. Background Technology

[0002] With the increasing demand for lightweighting in the automotive industry, variable wall thickness profiles are widely used due to their ability to bear loads on demand. These materials are typically manufactured using a process of "equal thickness coil - variable thickness rolling - roll forming." The rolled billet exhibits a periodic variation in thickness along its length, with alternating thick and thin sections. This thickness difference leads to variations in the moment of inertia of the cross-section; the thicker sections have high rigidity and exert significant pressure on guide components, while the thinner sections have low rigidity and are prone to swaying. Simultaneously, the edges of the billet may exhibit minor undulations caused by the rolling process. Before entering the forming process, these billets must be straightened to ensure flatness.

[0003] Currently, straightening and guiding of billets with varying thicknesses mostly employs fixed guide plates or single-unit adjustable guide structures. Fixed guide plates cannot adapt to edge undulations, easily leading to jamming or deviation; single-unit adjustable guide structures can only provide single-point constraints, making it difficult to simultaneously meet the high extrusion pressure of the thick area and the flexible support requirements of the thin area, easily causing damage to the guide components in the thick area and instability in the thin area, affecting straightening accuracy and forming quality.

[0004] Therefore, a straightening and guiding structure is needed that can adapt to the alternating thickness of the blank, achieve stable centering and guidance throughout the entire stroke, and avoid surface damage. Summary of the Invention

[0005] In view of this, the purpose of this invention is to propose a straightening and guiding structure that adapts to changes in profile wall thickness in order to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, the present invention provides a straightening guide structure for adaptive profile wall thickness variation, installed at the inlet of a straightening device, for guiding blanks for forming profiles with varying wall thicknesses, comprising: A support plate, and a plurality of guide units arranged at intervals along the billet travel direction on the support plate, the guide units comprising: The guide members disposed on both sides of the billet travel path form a limiting space between the guide members that is adapted to the width of the billet; An elastic reset member is connected between the guide members to provide a preload force that causes the guide members to move in opposite directions; The synchronization mechanism acts on the guide members to generate equidistant reverse mirror synchronous movements between the guide members, aligning the center line of the billet with the inlet center line of the straightening equipment. Multiple guide units are distributed at multiple points along the billet's travel direction and do not interfere with each other. The spacing of the limiting space floats within a preset range due to the coordinated action of the elastic reset member and the billet.

[0007] As a preferred embodiment of the present invention, each of the guide members is fixedly connected to a slider, the slider being slidably installed in a groove opened in the support plate, and the synchronization mechanism includes a linkage assembly that connects two sliders.

[0008] As a preferred embodiment of the present invention, the linkage assembly includes a pair of rockers and a movable member. One end of each rocker is rotatably connected to the corresponding slider, and the other ends of both rockers are hinged to the same movable member. The movable member is vertically mounted on the support plate, and its lifting direction is perpendicular to the lateral sliding direction of the slider.

[0009] As a preferred embodiment of the present invention, a guide rod is fixedly provided on the movable part, and a guide plate is fixedly provided on the bearing plate, wherein the guide rod is slidably engaged with the guide hole on the guide plate.

[0010] As a preferred embodiment of the present invention, the elastic reset member is a compression spring, and a spring positioning rod is provided on the slider, with the end of the compression spring sleeved on the spring positioning rod.

[0011] As a preferred embodiment of the present invention, the structure further includes a pressing component, which is linked to the movable part and moves up and down with the movable part to press the variable width blank from above.

[0012] As a preferred embodiment of the present invention, the clamping assembly includes: A roller frame, which is fixedly connected to the movable component; The pressure roller is rotatably connected to the roller frame at both ends and is located above the variable width blank.

[0013] As a preferred embodiment of the present invention, the structure further includes a blowing assembly, which is linked to the movable part and moves with the rise and fall of the movable part, for blowing air into the contact area between the guide and the variable width blank.

[0014] As a preferred embodiment of the present invention, the purging assembly includes: A bellows-type air pump with an air inlet and an air outlet, one end of which is connected to the movable part and the other end of which is connected to the guide plate. The bellows-type air pump stretches or compresses synchronously with the rise and fall of the movable part to achieve unidirectional air intake or unidirectional air ejection. An air blowing pipe has one end connected to the air outlet of the corrugated air pump, and the other end extends to the vicinity of the contact area between the guide and the variable width blank and is connected to an air blowing nozzle.

[0015] As a preferred embodiment of the present invention, the side of the guide member that contacts the variable width blank is provided with a plurality of freely rotatable rollers, and / or, the side of the guide member that contacts the variable width blank is provided with a transition slope.

[0016] The beneficial effects of this invention are as follows: This invention uses multiple guide units arranged at intervals along the travel direction to constrain the billet at multiple points. Each unit independently responds to the alternating thickness changes of the billet along its length, keeping the billet centered throughout its entire stroke. The synchronization mechanism forces the guide members on both sides to move in opposite directions at equal intervals, aligning the centerline of the billet with the centerline of the straightening equipment inlet, reducing deviation and torsion. The clamping assembly moves in conjunction with the moving parts, reducing the clamping force in thick areas to avoid damage and appropriately increasing the clamping force in thin areas to suppress shaking. The blowing assembly moves in conjunction with the moving parts to achieve automatic cleaning, preventing debris accumulation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a three-dimensional structural diagram of the straightening device, the support plate, and the guide plate of the present invention; Figure 3 This is a side view of the straightening device of the present invention. Figure 4 This is a three-dimensional structural diagram of the support plate, slider, guide, roller frame and pressure roller of the present invention; Figure 5 This is a bottom-view perspective view of the three-dimensional structure of the support plate, slider, roller frame, pressure roller, spring positioning rod, and elastic reset component of the present invention. Figure 6 This is a top-view perspective three-dimensional structural diagram of the support plate, slider, roller frame, pressure roller, spring positioning rod, and elastic reset member of the present invention; Figure 7 For the present invention Figure 6 Enlarged structural diagram at point A in the middle; Figure 8 This is a three-dimensional structural diagram of the slider, guide, spring positioning rod, and first hinge shaft of the present invention; Figure 9 This is a three-dimensional structural diagram of the rear end of the bellows-type air pump, air pipe, and air nozzle of the present invention. Figure 10 This is a three-dimensional structural diagram of the front end of the corrugated air pump, air pipe, and air nozzle of the present invention.

[0019] The markings in the diagram are as follows: 1. Straightening device; 2. Bearing plate; 3. Slider; 4. Slide groove; 5. Guide component; 6. Spring positioning rod; 7. Elastic reset component; 8. Rocker arm; 9. Connecting groove; 10. First hinge shaft; 11. Moving part; 12. Second hinge shaft; 13. Guide rod; 14. Fixed support rod; 15. Guide plate; 16. Guide hole; 17. Roller frame; 18. Pressure roller; 19. Fastening bolt; 20. Pad block; 21. Rocker arm clearance groove; 22. Transition slope; 23. Corrugated pipe air pump mounting base; 24. Corrugated pipe air pump; 25. Air inlet; 26. Air outlet; 27. Air blowing pipe; 28. Air blowing nozzle. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0021] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0022] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, an adaptive profile wall thickness variation straightening guide structure is installed at the inlet of straightening equipment 1 to guide the blank of forming a profile with variable wall thickness. It includes: a support plate 2, and multiple guide units arranged at intervals along the blank traveling direction on the support plate 2. The guide unit includes: guide members 5 oppositely arranged on both sides of the blank traveling path, with a limiting space between the guide members 5 adapted to the blank width; an elastic reset member 7 connected between the guide members 5 to provide a pre-tightening force to make the guide members 5 move in opposite directions; and a synchronization mechanism acting on the guide members 5 to make the guide members 5 move synchronously in opposite directions at equal intervals, so that the center line of the blank coincides with the center line of the inlet of the straightening equipment 1. The multiple guide units are distributed at multiple points along the blank traveling direction and do not interfere with each other. The spacing of the limiting space floats within a preset range with the cooperative action of the elastic reset member 7 and the blank. The above technical solution can solve the problems of point contact failure, sudden gap impact, and plate torsion caused by single-group guides when the billet thickness changes alternately. Specifically, its working principle is as follows: During use, the billet enters the inlet of the straightening equipment 1 along the travel direction and first contacts the guide members 5 of multiple guide units. Due to the alternating distribution of thick and thin areas along the length of the billet, the thick areas have high rigidity and exert a large compressive force on the guide members 5; the thin areas have low rigidity and are prone to shaking. When the thick area enters, the guide member 5 is slightly pushed away, compressing the elastic reset member 7. At the same time, the synchronization mechanism ensures that the guide members 5 on both sides move in opposite directions at equal intervals, so that the center line of the billet is always aligned with the center line of the inlet of the straightening equipment 1. When the thin area enters, the elastic reset member 7 pushes the guide member 5 to slightly reset and re-fit against the edge of the billet. The multi-point distribution of multiple guide units ensures that even if there are micro-undulations at the edge of the billet caused by the rolling process, the guide units at different positions can respond independently. The guide units in the non-changing areas still maintain the constraint on the billet, realizing stable centering guidance of the billet throughout the entire stroke and improving the straightening accuracy.

[0023] like Figure 5 and Figure 6 As shown, in this embodiment, each guide 5 is fixedly connected to a slider 3, and the slider 3 is slidably installed in the groove 4 opened in the support plate 2. The synchronization mechanism includes a linkage assembly, which connects two sliders 3. The above technical solution solves the problems of easy jamming and rapid wear of the guide component 5 when sliding directly. Specifically, its working principle is as follows: During use, when the blank pushes the guide component 5, the guide component 5 drives the slider 3 to slide laterally in the slide groove 4. The slide groove 4 provides precise sliding guidance for the slider 3, ensuring the accuracy of the movement direction. The connecting rod assembly connects the two sliders 3, ensuring that their movements are linked mechanically. By setting the cooperation between the slider 3 and the slide groove 4, the force on the guide component 5 is converted into the sliding force on the slider 3 in the slide groove 4, improving the load-bearing capacity and movement stability of the guide component 5.

[0024] like Figure 5 and Figure 6 As shown, in this embodiment, the linkage assembly includes a pair of rockers 8 and a movable member 11. One end of each rocker 8 is rotatably connected to the corresponding slider 3, and the other ends of both rockers 8 are hinged to the same movable member 11. The movable member 11 is vertically mounted on the support plate 2, and its lifting direction is perpendicular to the lateral sliding direction of the slider 3. The above technical solution enables low-cost, high-reliability forced mirror synchronization of the guide component 5. Specifically, its working principle is as follows: during use, when the two sliders 3 move towards or away from each other, they drive the rocker arm 8 to swing. The other end of the rocker arm 8 pushes or pulls the movable component 11 to rise and fall vertically. Since the two rocker arms 8 are hinged to the same movable component 11, the rising and falling motion of the movable component 11 forces the lateral displacement of the two sliders 3 to always be equal and opposite in direction, thus achieving strict mirror synchronization.

[0025] like Figure 2 , Figure 6 and Figure 9 As shown, in this embodiment, a guide rod 13 is fixedly provided on the movable part 11, and a guide plate 15 is fixedly provided on the bearing plate 2. The guide rod 13 and the guide hole 16 on the guide plate 15 are slidably engaged. The above technical solution can solve the problem of unstable lifting and lowering of the movable part 11, which leads to a decrease in synchronization accuracy. Specifically, its working principle is as follows: During use, when the movable part 11 is raised or lowered, the guide rod 13 slides in the guide hole 16, providing precise vertical guidance for the movable part 11 and preventing it from swaying or twisting. The cooperation between the guide rod 13 and the guide hole 16 ensures the straightness of the lifting and lowering movement of the movable part 11, ensures the accuracy of the rocker arm 8 transmission, and improves the accuracy of the mirror motion of the guide part 5.

[0026] like Figure 5 , Figure 6 and Figure 8 As shown, in this embodiment, the elastic reset member 7 is a compression spring, and a spring positioning rod 6 is provided on the slider 3. The end of the compression spring is sleeved on the spring positioning rod 6. The spacing of the limiting space is determined by the dynamic balance between the elastic force of the elastic reset member 7 and the extrusion force of the blank edge. When the thick area of ​​the blank passes through, the width of this area is narrower, the extrusion force of the blank edge on the guide member 5 decreases, the elastic reset member 7 releases elastic potential energy, and pushes the guide member 5 to close towards the middle, fitting the blank edge; when the thin area of ​​the blank passes through, the width of this area is wider, the extrusion force of the blank edge on the guide member 5 increases, the guide member 5 is pushed to both sides, compressing the elastic reset member 7 and accumulating elastic potential energy. The spacing of the guide members 5 fluctuates within a preset range as the thickness changes, always maintaining a close fit with the blank edge; The above technical solution can solve the problem of resetting slider 3. Specifically, its working principle is as follows: During installation, the two ends of the compression spring are respectively sleeved on the spring positioning rods 6 of the two sliders 3. The spring is in a compressed state, providing a preload force to make the two sliders 3 move towards each other. The spring positioning rods 6 radially position the compression spring to prevent the spring from bending or coming off during operation. In use, when the width of the blank increases and pushes open the guide 5, the compression spring is further compressed; when the width of the blank decreases or the protrusion passes through, the compression spring releases energy and pushes the slider 3 to reset.

[0027] like Figure 4 , Figure 5 and Figure 6 As shown, in this embodiment, the structure also includes a pressing component, which is linked to the movable part 11 and moves up and down with the movable part 11 to press the variable width blank from above. The above technical solution solves the problem that traditional fixed clamping structures are prone to damaging thick areas or failing to clamp thin areas properly when the billet thickness changes, leading to wobbling. Specifically, its working principle is as follows: During use, when the movable part 11 rises and falls, the clamping assembly rises and falls synchronously. When a narrow section of the billet enters, the slider 3 moves towards the opposite side, the movable part 11 rises, and the clamping assembly rises accordingly, releasing pressure on the thicker narrow section or applying only a slight contact force to avoid damaging the billet. When a wider section of the billet enters, the slider 3 moves away from the opposite side, the movable part 11 falls, and the clamping assembly falls accordingly, applying appropriate clamping force to the thinner wide section to ensure the billet remains stable during the guiding process and prevents wobbling. Ultimately, the linkage between the clamping assembly and the movable part 11 achieves automatic matching of the clamping force and the width of the billet.

[0028] like Figure 5 and Figure 6 As shown, in this embodiment, the pressing assembly includes: a roller frame 17, which is fixedly connected to the movable part 11; and a pressing roller 18, whose two ends are rotatably connected to the roller frame 17 and located above the variable width blank. The above technical solution can solve the problem of asynchronous changes in clamping force and blank width. Specifically, its working principle is as follows: During use, when the movable part 11 rises and falls, it drives the roller frame 17 and the clamping roller 18 to rise and fall synchronously. The clamping roller 18 contacts the upper surface of the blank, pressing the blank firmly onto the supporting surface below. The clamping roller 18 uses rolling contact, which reduces friction with the blank and avoids scratching the blank surface.

[0029] like Figure 9 and Figure 10 As shown, in this embodiment, the structure also includes a blowing assembly, which is linked to the movable part 11 and moves with the rise and fall of the movable part 11, and is used to blow air into the contact area between the guide 5 and the variable width blank. The above technical solution can solve the problem of debris accumulation causing the guide component 5 to jam or scratch the billet. Specifically, its working principle is as follows: During use, every time the movable part 11 rises and falls, the blowing component operates once, spraying airflow into the contact area between the guide component 5 and the billet, blowing away any accumulated debris, dust, or coolant. The linkage between the blowing component and the movable part 11 enables automatic cleaning on demand. The more frequently the billet width changes, the more frequent the blowing action, ensuring clean contact between the guide component 5 and the edge of the billet.

[0030] like Figure 9 and Figure 10As shown, in this embodiment, the purging assembly includes: a bellows-type air pump 24 with an air inlet 25 and an air outlet 26, one end of which is connected to the movable member 11 and the other end of which is connected to the guide plate 15. The bellows-type air pump 24 stretches or compresses synchronously with the lifting and lowering of the movable member 11 to achieve unidirectional air intake or unidirectional air ejection; an air blowing pipe 27, one end of which is connected to the air outlet 26 of the bellows-type air pump 24, and the other end extends to the vicinity of the contact area between the guide member 5 and the variable width blank and communicates with an air blowing nozzle 28; a first one-way valve that only allows air to enter is provided at the air inlet 25, and a second one-way valve that only allows air to exit is provided at the air outlet 26. When the bellows-type air pump 24 stretches, the first one-way valve opens and the second one-way valve closes, allowing external air to enter the pump body; when the bellows-type air pump 24 compresses, the first one-way valve closes and the second one-way valve opens, allowing air inside the pump to exit through the air outlet 26; The above technical solution can solve the problem that traditional purging requires a separate air source and control system. Specifically, its working principle is as follows: When the movable part 11 rises, it stretches the bellows-type air pump 24 and draws in air through the air inlet 25; when the movable part 11 falls, it compresses the bellows-type air pump 24, and the air is forced out from the air outlet 26 and sprayed at high speed towards the contact area through the air blowing pipe 27 and the air blowing nozzle 28.

[0031] like Figure 4 and Figure 6 As shown, in this embodiment, the guide member 5 is provided with a plurality of freely rotatable rollers on the side that contacts the variable width blank, and / or, the guide member 5 is provided with a transition slope 22 on the side that contacts the variable width blank. The above technical solution can improve the smoothness of guidance and the surface quality of the blank. Specifically, its working principle is as follows: When in use, the roller 21 changes the sliding friction between the guide 5 and the edge of the blank into rolling friction, which greatly reduces the friction force and avoids the edge of the blank being scratched; the transition slope 22 plays a guiding role when the blank enters the guide 5, preventing the end of the blank from hitting the edge of the guide 5 and causing damage.

[0032] like Figure 6 and Figure 7 As shown, in this embodiment, the roller frame 17 and the movable part 11 are provided with bolt holes in the contact area. The bolt holes are used to install fastening bolts 19 and their nuts. By adding a pad 20 between the roller frame 17 and the movable part 11, the height of the roller frame 17 relative to the bearing plate 2 can be adjusted. The above technical solution can solve the problem that different specifications of blanks have different requirements for the initial position of the pressing roller, and improve the versatility and adaptability of the equipment. Specifically, its working principle is as follows: When in use, according to the thickness of different blanks or process requirements, pads 20 of different thicknesses can be placed between the roller frame 17 and the movable part 11, and then fixed by fastening bolts 19, thereby adjusting the initial height position of the pressing roller 18.

[0033] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention (including the claims) is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in the details for the sake of brevity.

[0034] This invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A straightening guide structure for adaptive profile wall thickness variation, installed at the inlet of a straightening device (1), for guiding the blank for forming a profile with variable wall thickness, characterized in that, include: A support plate (2) and a plurality of guide units arranged at intervals along the billet travel direction on the support plate (2), the guide units comprising: The guide members (5) arranged on both sides of the billet travel path form a limiting space adapted to the width of the billet; An elastic reset member (7) is connected between the guide members (5) to provide a preload force that causes the guide members (5) to move in opposite directions; The synchronization mechanism acts on the guide (5) to generate equidistant reverse mirror synchronous motion between the guide (5), so that the center line of the billet coincides with the center line of the inlet of the straightening device (1). Multiple guide units are distributed at multiple points along the billet travel direction and do not interfere with each other. The spacing of the limiting space floats within a preset range with the cooperative action of the elastic reset member (7) and the billet.

2. The adaptive profile wall thickness variation straightening and guiding structure according to claim 1, characterized in that, Each of the guide members (5) is fixedly connected to a slider (3), which is laterally slidably installed in a groove (4) opened in the support plate (2). The synchronization mechanism includes a linkage assembly that connects two sliders (3).

3. The adaptive profile wall thickness variation straightening and guiding structure according to claim 2, characterized in that, The linkage assembly includes a pair of rockers (8) and a movable member (11). One end of each rocker (8) is rotatably connected to the corresponding slider (3), and the other end of both rockers (8) is hinged to the same movable member (11). The movable member (11) is mounted on the support plate (2) in a lifting and lowering manner, and its lifting and lowering direction is perpendicular to the lateral sliding direction of the slider (3).

4. The adaptive profile wall thickness variation straightening and guiding structure according to claim 3, characterized in that, A guide rod (13) is fixedly installed on the movable part (11), and a guide plate (15) is fixedly installed on the bearing plate (2). The guide rod (13) and the guide hole (16) on the guide plate (15) are slidably engaged.

5. The adaptive profile wall thickness variation straightening and guiding structure according to claim 2, characterized in that, The elastic reset component (7) is a compression spring, and a spring positioning rod (6) is provided on the slider (3). The end of the compression spring is sleeved on the spring positioning rod (6).

6. The adaptive profile wall thickness variation straightening and guiding structure according to claim 3, characterized in that, The structure also includes a clamping assembly, which is linked to the movable part (11) and moves up and down with the movable part (11) to clamp the variable width blank from above.

7. The adaptive profile wall thickness variation straightening and guiding structure according to claim 6, characterized in that, The clamping assembly includes: Roller frame (17), which is fixedly connected to the movable part (11); The pressing roller (18) is rotatably connected at both ends to the roller frame (17) and is located above the variable width blank.

8. The adaptive profile wall thickness variation straightening and guiding structure according to claim 4, characterized in that, The structure also includes a blowing assembly, which is linked to the movable part (11) and moves with the rise and fall of the movable part (11) to blow air into the contact area between the guide (5) and the variable width blank.

9. The adaptive profile wall thickness variation straightening guide structure according to claim 8, characterized in that, The purging assembly includes: A bellows-type air pump (24) with an air inlet (25) and an air outlet (26) is connected at one end to the movable part (11) and at the other end to the guide plate (15). The bellows-type air pump (24) stretches or compresses synchronously with the moving part (11) as it rises and falls, so as to achieve unidirectional air intake or unidirectional air jet. An air blowing pipe (27) is connected at one end to the air outlet (26) of the corrugated air pump (24) and at the other end to the vicinity of the contact area between the guide (5) and the variable width blank and is connected to an air blowing nozzle (28).

10. The adaptive profile wall thickness variation straightening and guiding structure according to claim 1, characterized in that, The guide member (5) is provided with a plurality of freely rotatable rollers on the side that contacts the variable width blank, and / or, the guide member (5) is provided with a transition slope (22) on the side that contacts the variable width blank.

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