Method for straightening a w-shaped steel

Abstract

The application discloses a W-shaped steel correcting method and relates to the technical field of W-shaped steel processing equipment. The W-shaped steel correcting mechanism comprises a correcting frame, a driving device, a correcting upper roller and a correcting lower roller, a correcting upper roller seat, a correcting lower roller seat, a correcting upper roller shaft and a correcting lower roller shaft. The correcting upper roller is provided with two upper side roller surfaces which are matched with the outer side surfaces of the two inclined webs of the W-shaped steel. The correcting lower roller is provided with two lower side roller surfaces which are matched with the inner side surfaces of the two inclined webs of the W-shaped steel. The correcting mechanism is arranged after the rolling forming process and directly acts on the formed W-shaped steel section, can correct the deformation of the first end and the overall upwarping and downwarping, makes the W-shaped steel smoothly and centrally pass through the cutting port of the cutting die, reduces the cutting size error, effectively limits the left and right swinging of the W-shaped steel in the horizontal direction of the width during the correcting process and provides stable straightness guarantee for the subsequent cutting process.

Description

Technical Field

[0001] The present invention relates to the technical field of W-shaped steel processing equipment, and particularly relates to a correction mechanism for the warping defects of W-shaped steel after rolling forming, as well as a rolling forming device and a production line including the correction mechanism. Background Art

[0002] Due to the special W-shaped cross-section structure of W-shaped steel, it has excellent anti-bending strength and installation adaptability, and is suitable for fields such as seismic supports. The cross-section of W-shaped steel includes a central web, inclined webs and flanges symmetrically distributed on both sides of the central web, and connecting plates located at the ends of the flanges. The stress is usually dispersed reasonably through arc transitions between various parts.

[0003] At present, W-shaped steel mostly adopts the continuous rolling forming process of steel strips. During the rolling process, affected by factors such as uneven internal stress distribution of the steel strip raw material, deviation in the linear speed matching of the upper and lower rolling rolls, and temperature difference between the upper and lower surfaces of the steel strip, the W-shaped steel after rolling forming is prone to morphological defects such as upward warping, downward warping or overall bending at the head end. Such warping defects will cause the W-shaped steel to be unable to accurately enter the follow-up cutting device, resulting in deviation in the cutting length dimension, and at the same time affecting the fitting degree and structural stability during subsequent installation. Therefore, it is necessary to effectively correct the W-shaped steel after rolling forming.

[0004] Some solutions related to the correction of profiled steel have been disclosed in the prior art. For example, Patent CN222402807U discloses a W-shaped steel belt machine for mines with an anti-dropping slag function, which realizes the correction function through the cooperation of an electric rod and a correction wheel. However, its correction object is the steel bar raw material before pressing, mainly for correcting the deviation of the strip steel, and it cannot perform the up-and-down warping correction on the W-shaped steel belt after rolling forming. Patent CN217102358U discloses a forming machine for the production of W-shaped steel belts based on reinforcing ribs, which laterally limits the W-shaped steel belt through rotating rollers, but lacks the ability to actively correct the up-and-down warping of the cross-section of the profiled steel.

[0005] W-shaped steel is similar to but different from W-shaped steel belt. The central web, inclined webs and flanges are in a "U" shape. After rolling, the deformation amplitude is larger than that of the steel strip raw material, the cross-section is more complex, which is likely to cause residual stress concentration and uneven stiffness distribution, and the warping amplitude is also larger. Therefore, correction must be carried out. The prior art only corrects the position or deviation of the steel strip raw material before rolling, and does not correct the cross-section warping of the W-shaped steel after rolling forming.

[0006] Therefore, it is necessary to provide a W-shaped steel correction mechanism with strong pertinence and high adaptability, which can effectively repair the warping of W-shaped steel after rolling forming, and integrate it into the W-shaped steel rolling forming device and production line to improve product quality and production stability. Summary of the Invention

[0007] The purpose of this invention is to provide a W-shaped steel straightening mechanism, which actively corrects upward or downward warping defects in the W-shaped steel after rolling by setting straightening roller surfaces adapted to multiple key parts of the W-shaped steel cross-section; and on this basis, to provide a W-shaped steel rolling and forming device and a W-shaped steel production line integrating the straightening mechanism, thereby solving the problems of unreasonable straightening timing, single straightening function, and inability to adapt to the warping repair needs after rolling in the prior art.

[0008] To achieve the above objectives, in a first aspect, the present invention provides a W-shaped steel straightening mechanism, comprising a straightening frame, a driving device, an upper straightening roller and a lower straightening roller, an upper straightening roller seat, a lower straightening roller seat, an upper straightening roller shaft, and a lower straightening roller shaft.

[0009] Both the upper and lower straightening rollers can rotate relative to the straightening frame; and the upper straightening roller is located above the lower straightening roller, forming a straightening gap between them for the W-shaped steel to pass through.

[0010] The straightening roller has two upper roller surfaces that are adapted to the outer surfaces of the two inclined webs of the W-shaped steel, and the upper roller surfaces are conical surfaces.

[0011] The straightening lower roller has two lower roller surfaces adapted to the inner surfaces of the two inclined webs of the W-shaped steel, and the lower roller surfaces are conical surfaces;

[0012] When the first end of the rolled W-shaped steel enters the straightening gap: if the W-shaped steel is tilted upwards, the upper straightening roller is driven to descend by the drive device, so that the two upper roller surfaces press against the outer surfaces of the two inclined webs of the W-shaped steel to eliminate the warping; if the W-shaped steel is tilted downwards, the lower straightening roller is driven to rise by the drive device, so that the two lower roller surfaces press against the inner surfaces of the two inclined webs of the W-shaped steel to eliminate the warping.

[0013] The upper straightening roller has an upper center roller surface adapted to the upper end face of the central web of the W-shaped steel. When the upper roller surface presses against the outer surfaces of the two inclined webs of the W-shaped steel, the upper center roller surface simultaneously presses against the upper end face of the central web of the W-shaped steel to eliminate warping. The lower straightening roller has a lower center roller surface adapted to the lower end face of the central web of the W-shaped steel. When the lower roller surface presses against the inner surfaces of the two inclined webs of the W-shaped steel, the lower center roller surface simultaneously presses against the lower end face of the central web of the W-shaped steel to eliminate warping. By simultaneously pressing the inclined webs and the central web, the overall cross-section is synergistically straightened.

[0014] The upper straightening roller shaft is fixedly connected to the upper straightening roller seat, and the upper straightening roller is rotatably mounted on the upper straightening roller shaft. The lower straightening roller shaft is fixedly connected to the lower straightening roller seat, and the lower straightening roller is rotatably mounted on the lower straightening roller shaft. The straightening frame includes a base and a first guide rod. The base is set on the machine frame, and at least two first guide rods are set and fixedly mounted on the base.

[0015] Based on the above overall scheme, the present invention provides two implementation schemes with different structures. In a preferred implementation scheme, the W-shaped steel straightening mechanism further includes an integrated lifting frame, which is slidably connected to the first guide rod. The upper and lower straightening roller seats are both fixedly connected to the integrated lifting frame. The straightening frame also includes an upper connecting plate, which is fixedly connected to the upper part of each first guide rod. The base is fixedly mounted on the frame. The drive device is mounted on the upper connecting plate, and the output end of the drive device is connected to the integrated lifting frame.

[0016] The drive unit can be an automated linear actuator, such as a pneumatic cylinder, hydraulic cylinder, or electric cylinder, or a manually operated ball screw assembly. The drive unit moves the integrated lifting frame up and down to a preset position. This movement of the integrated lifting frame also causes the upper and lower straightening rollers to rise and fall simultaneously.

[0017] If the W-shaped steel warps upwards, the drive device lowers the integrated lifting frame. Since the upper straightening roller is above the W-shaped steel and the lower straightening roller is below it, the upper straightening roller descends closer to the W-shaped steel, while the lower straightening roller descends further away. The two upper roller surfaces press against the outer surfaces of the two inclined webs of the W-shaped steel to eliminate warping. Conversely, if the W-shaped steel warps downwards, the drive device raises the integrated lifting frame, causing the two lower roller surfaces to press against the inner surfaces of the two inclined webs of the W-shaped steel to eliminate warping.

[0018] This implementation plan uses an integrated lifting frame to achieve synchronous lifting of the upper and lower straightening rollers. However, due to the difference in their arrangement, only the upper or lower straightening rollers come into contact with the W-shaped steel for straightening.

[0019] In another preferred embodiment, the W-shaped steel straightening mechanism further includes a first lifting frame, a second lifting frame, a second guide rod, an upper rolling element, a lower rolling element, a guide frame, a linear guide rail, and an elastic element. The linear guide rail is fixedly mounted on the frame, and the base is fixedly connected to the moving parts of the linear guide rail. A drive device is mounted on the frame, and the output end of the drive device is connected to the base. The drive device drives the base to move in the direction toward or away from the W-shaped steel conveying direction. At least two second guide rods are provided and fixedly mounted on the base. The first lifting frame is slidably connected to the first guide rod, and the second lifting frame is slidably connected to the second guide rod. The upper straightening roller seat is fixedly connected to the first lifting frame, and the lower straightening roller seat is fixedly connected to the second lifting frame. Upper rolling elements that can rotate relative to the upper straightening roller shaft are installed at both ends of the upper straightening roller shaft, and the lower straightening roller... The shaft has lower rolling elements that can rotate relative to it at both ends; the guide frame is fixedly connected to the frame, and the guide frame includes an upper guide part that contacts and cooperates with the upper rolling element and a lower guide part that contacts and cooperates with the lower rolling element. The upper guide part includes an upper inclined upward section and an upper horizontal section, and the lower guide part includes a lower inclined downward section and a lower horizontal section. Both the upper and lower horizontal sections are horizontally set. As the upper rolling element moves from the end of the upper inclined upward section away from the upper horizontal section to the end closer to the upper horizontal section, its height gradually decreases, so that the straightening upper roller can gradually descend and contact the W-shaped steel; as the lower rolling element moves from the end of the lower inclined downward section away from the lower horizontal section to the end closer to the lower horizontal section, its height gradually increases, so that the straightening lower roller can gradually rise and contact the W-shaped steel.

[0020] The elastic element is mounted on the second guide rod, with its lower end connected to the second lifting frame and its upper end connected to the first lifting frame. The elastic element provides elastic force, causing the first and second lifting frames to move away from each other, which in turn causes the upper and lower straightening rollers to move away from each other. This results in the upper straightening roller having an upward tendency to move, ensuring it remains in contact with the lower end face of the upper guide section; it also causes the lower straightening roller to have a downward tendency to move, ensuring it remains in contact with the upper end face of the lower guide section. Thus, when the upper and lower straightening rollers approach the last rolling roll, the straightening gap between them is at its maximum, facilitating the passage of the W-shaped steel regardless of whether it is tilted upwards or downwards.

[0021] This implementation scheme adopts a structure of two separate lifting frames + guide frames + rolling elements. By moving the straightening mechanism relative to the rolling roll group, the upper straightening roll and the lower straightening roll automatically approach or move away from the W-shaped steel along the upper guide section and the lower guide section, respectively, to achieve progressive straightening.

[0022] When the straightening mechanism moves with the base to the working section of the guide section, one of the upper and lower straightening rollers gradually approaches and presses against the W-shaped steel to correct the warping in the corresponding direction.

[0023] When the upper rolling element contacts the upper horizontal section and the lower rolling element contacts the lower horizontal section, both the upper and lower straightening rollers contact the W-shaped steel, but they do not simultaneously squeeze the W-shaped steel into contact.

[0024] Secondly, the present invention provides a W-shaped steel rolling forming device, characterized in that it includes a frame, a horizontal guiding mechanism, a side guiding mechanism, a rolling mechanism, and any of the above-mentioned W-shaped steel straightening mechanisms, wherein the horizontal guiding mechanism, the side guiding mechanism, the rolling mechanism, and the W-shaped steel straightening mechanism are sequentially arranged on the frame along the W-shaped steel conveying direction.

[0025] The horizontal guiding mechanism includes two feed plates and a feed guide roller rotatably mounted between the two feed plates. The feed guide roller is divided into an upper feed guide roller and a lower feed guide roller, with at least two of each type. A feeding channel for the strip steel is formed between the upper and lower feed guide rollers, used to support and guide the strip steel raw material. The side guiding mechanism includes a side support and side guide wheels. The side support is fixedly mounted on the frame, and two side guide wheels are rotatably mounted on the side support. The two side guide wheels respectively contact the two side edges of the strip steel raw material. Through the clamping and guiding of the side guide wheels, the width direction position of the strip steel is controlled, allowing it to accurately enter between the rolling rolls of the rolling mechanism. After being guided by the horizontal guiding mechanism and the side guiding mechanism, the strip steel raw material can accurately enter the rolling rolls of the rolling mechanism.

[0026] The rolling mechanism includes multiple sets of rolling rolls, an adjusting assembly, and a rotary power unit to drive each rolling roll set. Each rolling roll set is divided into an upper rolling roll and a lower rolling roll, with the lower rolling roll rotatably mounted on the frame. The adjusting assembly includes an adjusting seat and an adjusting screw. The adjusting seat is slidably connected to the frame, and the upper rolling roll is rotatably mounted on the adjusting seat. The height of the adjusting seat is adjusted by adjusting the adjusting screw, thereby adjusting the height of the upper rolling roll. The lower rolling roll is the driving rolling roll. Adjacent rolling rolls in the lower layer are connected by chain drive. A driving roll is rotatably mounted on the frame, and the rotary power unit is connected to the driving roll via chain drive. The driving roll is connected to the lower rolling roll via chain drive. The strip steel raw material is rolled sequentially through multiple sets of rolling rolls, and its cross-section gradually transitions from a flat strip to a W-shaped profile, ultimately being rolled into the target W-shaped steel.

[0027] The W-beam straightening mechanism is located at the rear end of the rolling mechanism and is used to perform online warping correction on the W-beams that have just been rolled and are still in a continuous conveying state.

[0028] Thirdly, the present invention also provides a W-shaped steel production line, including a follow-up cutting device and any of the above-mentioned W-shaped steel rolling forming devices. The follow-up cutting device includes a machine body, a cutting cylinder and a cutting die. The cutting cylinder and the cutting die are both mounted on the machine body. The cutting die includes a cutting opening adapted to the contour of the W-shaped steel for the W-shaped steel to pass through. The cutting blade connected to the cutting cylinder moves in a direction perpendicular to the movement of the W-shaped steel, thereby cutting the W-shaped steel at the cutting point.

[0029] Because the W-shaped steel has been corrected for warping at the top and bottom by a straightening mechanism before entering the cutting die, it can enter the cutting opening stably and accurately, thus ensuring the cutting length accuracy and cross-sectional perpendicularity.

[0030] Compared with existing technologies, this technical solution has at least one of the following beneficial effects:

[0031] 1. The straightening mechanism is set after the rolling and forming process and acts directly on the formed W-shaped steel section. It can correct the upward and downward warping deformation of the first end and the whole, so that the W-shaped steel completes the section warping correction before entering the follow-up cutting, so that the W-shaped steel can pass through the cutting mouth of the cutting die smoothly and centrally, reducing the cutting size error.

[0032] 2. The upper and lower straightening rollers are respectively equipped with side roller surfaces that are adapted to the outer and inner sides of the two inclined webs of the W-shaped steel. They can guide the W-shaped steel in the width direction, effectively limit the left and right swing of the W-shaped steel in the horizontal width direction during the straightening process, avoid lateral deviation, and provide stable straightness guarantee for the subsequent cutting process. Attached Figure Description

[0033] Figure 1 A perspective view of a W-shaped steel straightening mechanism provided in one embodiment of this application;

[0034] Figure 2 A front view of a W-shaped steel straightening mechanism provided in one embodiment of this application;

[0035] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0036] Figure 4 This is a schematic diagram of the structure of a W-beam steel production line provided in one embodiment of this application;

[0037] Figure 5 for Figure 4 A magnified view of a section at point B in the middle;

[0038] Figure 6 for Figure 4 A magnified view of a section at point C;

[0039] Figure 7A three-dimensional W-shaped steel straightening mechanism provided in another embodiment of this application Figure 1 ;

[0040] Figure 8 A three-dimensional W-shaped steel straightening mechanism provided in another embodiment of this application Figure 2 (Eliminates the need for guide frames and linear guides);

[0041] Figure 9 This is a schematic diagram of the structure of a W-beam steel production line provided in another embodiment of this application;

[0042] Figure 10 A partial schematic diagram of a W-beam steel production line provided for another embodiment of this application;

[0043] In the diagram, 101 is the straightening frame; 1011 is the base; 1012 is the first guide rod; 1013 is the upper connecting plate; 102 is the drive device; 103 is the upper straightening roller; 1031 is the upper side roller surface; 1032 is the upper center roller surface; 104 is the lower straightening roller; 1041 is the lower side roller surface; 1042 is the lower center roller surface; 105 is the upper straightening roller seat; 106 is the lower straightening roller seat; 107 is the upper straightening roller shaft; 108 is the integrated lifting frame; 109 is the first lifting frame; 110 is the second lifting frame; 111 is the second guide rod; 112 is the upper rolling element; 113 is the lower rolling element; 114 is the guide frame; 1141 is the upper inclined upward section; 1142 is the upper horizontal section; 1 143. Lower inclined downward section; 1144. Lower horizontal section; 115. Linear guide rail; 116. Lower straightening roller shaft; 117. Elastic element; 200. W-shaped steel; 210. Inclined web plate; 220. Central web plate; 310. Frame; 320. Horizontal guide mechanism; 321. Feed plate; 322. Upper feed guide roller; 323. Lower feed guide roller; 330. Side guide mechanism; 331. Side support; 332. Side guide wheel; 340. Rolling mechanism; 341. Upper rolling roller; 342. Lower rolling roller; 343. Adjusting seat; 344. Adjusting screw; 400. Follow-up cutting device; 410. Cutting die; 411. Cutting end. Detailed Implementation

[0044] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0045] Please see Figures 1 to 10This application provides a W-beam production line, including a follow-up cutting device 400 and a W-beam rolling forming device, wherein, please refer to Figure 4 , Figure 9 and Figure 10 The follow-up cutting device 400 includes a machine body, a cutting cylinder, and a cutting die 410. Both the cutting cylinder and the cutting die 410 are mounted on the machine body. The cutting die 410 includes a cutting opening 411 adapted to the contour of the W-shaped steel 200 for the W-shaped steel 200 to pass through. The follow-up cutting device 400 is an existing follow-up cutting machine. The shape of the cutting opening 411 is adaptively adjusted. The cutting blade connected to the cutting cylinder moves in a direction perpendicular to the movement of the W-shaped steel 200, thereby cutting the W-shaped steel 200 at the cut-off point.

[0046] Please see Figure 4 and Figure 9 The W-shaped steel rolling forming device includes a frame 310, a horizontal guiding mechanism 320, a side guiding mechanism 330, a rolling mechanism 340, and a W-shaped steel straightening mechanism. The horizontal guiding mechanism 320, the side guiding mechanism 330, the rolling mechanism 340, and the W-shaped steel straightening mechanism are sequentially arranged on the frame 310 along the conveying direction of the W-shaped steel 200.

[0047] Please see Figure 5 The horizontal feeding mechanism 320 includes two feeding plates 321 and a feeding feed roller rotatably mounted between the two feeding plates 321 via bearings. The feeding feed roller is divided into an upper feeding feed roller 322 and a lower feeding feed roller 323. Two upper feeding feed rollers 322 and three lower feeding feed rollers 323 are provided respectively. A feeding channel for strip steel to pass through is formed between the upper feeding feed rollers 322 and the lower feeding feed rollers 323, which is used to support and feed the strip steel raw material.

[0048] Please see Figure 5 The side guide mechanism 330 includes a side bracket 331 and side guide wheels 332. The side bracket 331 is fixedly mounted on the frame 310. Two side guide wheels 332 are rotatably mounted on the side bracket 331 via bearings. The two side guide wheels 332 respectively contact the two side edges of the strip material. Through the clamping and guiding of the side guide wheels 332, the width direction position of the strip is controlled, allowing it to accurately enter between the rolling rolls of the rolling mechanism 340. After being guided by the horizontal guide mechanism 320 and the side guide mechanism 330, the strip material can accurately enter the rolling rolls of the rolling mechanism 340.

[0049] Please see Figure 4 and Figure 6The rolling mechanism 340 includes 11 sets of rolling rolls, an adjustment assembly, and a rotary power device for driving each rolling roll set to rotate. Each rolling roll set is divided into an upper rolling roll 341 and a lower rolling roll 342. The lower rolling roll 342 is rotatably mounted on the frame 310 via bearings. The adjustment assembly includes an adjustment seat 343 and an adjustment screw 344. The adjustment seat 343 is slidably connected to the frame 310. The upper rolling roll 341 is rotatably mounted on the adjustment seat 343 via bearings. The adjustment screw 344 is rotatably connected to the adjustment seat 343 via bearings and threadedly connected to the frame 310. The height of the adjustment seat 343 is adjusted by adjusting the adjustment screw 344, thereby adjusting the height of the upper rolling roll 341. Alternatively, an adjusting screw 344 can be threaded onto an adjusting seat 343, with the adjusting screw 344 slidably connected to the frame 310. The adjusting screw 344 is fixed to the frame 310 using two adjusting nuts. Rotating the adjusting nuts adjusts the height of the adjusting screw 344, thereby adjusting the height of the adjusting seat 343. The lower-layer rolling roll is the active rotating roll. Adjacent rolling rolls in the lower layer are connected by a chain drive. An active roll is rotatably mounted on the frame 310 via bearings. The rotational power unit is connected to the active roll via a chain drive, and the active roll is connected to the lower-layer rolling roll via a chain drive.

[0050] The strip steel raw material is rolled sequentially through 11 sets of rolling rolls, and its cross-section gradually transitions from a flat strip to a W-shaped strip, and is finally rolled into the target W-shaped steel 200.

[0051] Please see Figure 4 The W-beam straightening mechanism is located at the rear end of the rolling mechanism 340 and is used to perform online warping correction on the W-beam 200 that has just been rolled and is still in a continuous conveying state.

[0052] Please see Figure 1 and Figure 2 The W-shaped steel straightening mechanism includes a straightening frame 101, a drive device 102, a straightening upper roller 103 and a straightening lower roller 104, a straightening upper roller seat 105, a straightening lower roller seat 106, a straightening upper roller shaft 107, and a straightening lower roller shaft 116.

[0053] Both the upper straightening roller 103 and the lower straightening roller 104 can rotate relative to the straightening frame 101; and the upper straightening roller 103 is located above the lower straightening roller 104, forming a straightening gap between them for the W-shaped steel 200 to pass through.

[0054] Please refer to Figure 3 The straightening roller 103 has two upper roller surfaces 1031 that are adapted to the outer surfaces of the two inclined webs 210 of the W-shaped steel 200;

[0055] The straightening lower roller 104 has two lower roller surfaces 1041 that are adapted to the inner surfaces of the two inclined webs 210 of the W-shaped steel 200;

[0056] The upper straightening roller 103 has an upper central roller surface 1032 that matches the upper end face of the central web 220 of the W-shaped steel 200. When the upper roller surface 1031 presses against the outer surfaces of the two inclined webs 210 of the W-shaped steel 200, the upper central roller surface 1032 simultaneously presses against the upper end face of the central web 220 of the W-shaped steel 200 to eliminate warping. The lower straightening roller 104 has a lower central roller surface 1042 that matches the lower end face of the central web 220 of the W-shaped steel 200. When the lower roller surface 1041 presses against the inner surfaces of the two inclined webs 210 of the W-shaped steel 200, the lower central roller surface 1042 simultaneously presses against the lower end face of the central web 220 of the W-shaped steel 200 to eliminate warping. By simultaneously pressing the inclined webs 210 and the central web 220, the overall cross-section is synergistically straightened.

[0057] The upper straightening roller shaft 107 is fixedly connected to the upper straightening roller seat 105. The upper straightening roller 103 is rotatably mounted on the upper straightening roller shaft 107 via bearings. The lower straightening roller shaft 116 is fixedly connected to the lower straightening roller seat 106. The lower straightening roller 104 is rotatably mounted on the lower straightening roller shaft 116 via bearings. The straightening frame 101 includes a base 1011 and a first guide rod 1012. Two first guide rods 1012 are provided and fixedly mounted on the base 1011.

[0058] In some implementations, please refer to Figure 1 and Figure 2 The W-shaped steel straightening mechanism also includes an integrated lifting frame 108, which is slidably connected to the first guide rod 1012. The upper straightening roller seat 105 and the lower straightening roller seat 106 are both fixedly connected to the integrated lifting frame 108. The straightening frame 101 also includes an upper connecting plate 1013, which is fixedly connected to the upper part of each first guide rod 1012. The base 1011 is fixedly mounted on the frame 310. The drive device 102 is mounted on the upper connecting plate 1013, and the output end of the drive device 102 is connected to the integrated lifting frame 108.

[0059] In this embodiment, please refer to Figure 1 and Figure 2 The drive device 102 is a manually operated ball screw assembly. In other embodiments, it can be an automated linear actuator, such as a cylinder, hydraulic cylinder, electric cylinder, or electro-hydraulic push rod. The screw of the ball screw assembly is threadedly connected to the upper connecting plate 1013 and rotatably connected to the integrated lifting frame 108 via a bearing; or the screw of the ball screw assembly is rotatably connected to the upper connecting plate 1013 via a bearing and threadedly connected to the integrated lifting frame 108.

[0060] As the first end of the W-shaped steel 200 passes through the last set of rolling rolls, the operator observes whether the first end of the W-shaped steel 200 curves upwards or downwards. Through operator control, the drive unit 102 drives the integrated lifting frame 108 to rise and fall to the preset position. The drive unit 102's movement of the integrated lifting frame 108 simultaneously raises and lowers the upper straightening roll 103 and the lower straightening roll 104. If the W-shaped steel 200 tilts upwards, the drive device 102 drives the integrated lifting frame 108 to descend. Since the upper straightening roller 103 is located above the W-shaped steel 200 and the lower straightening roller 104 is located below the W-shaped steel 200, the upper straightening roller 103 will descend closer to the W-shaped steel 200, and the lower straightening roller 104 will descend further away from the W-shaped steel 200. The two upper roller surfaces 1031 press against the outer surfaces of the two inclined webs 210 of the W-shaped steel 200 to eliminate warping. Conversely, if the W-shaped steel 200 tilts downwards, the drive device 102 drives the integrated lifting frame 108 to rise, causing the two lower roller surfaces 1041 to press against the inner surfaces of the two inclined webs 210 of the W-shaped steel 200 to eliminate warping.

[0061] In this embodiment, an integrated lifting frame 108 is used to achieve synchronous lifting of the upper straightening roller 103 and the lower straightening roller 104. However, due to the difference in their arrangement positions, only the upper straightening roller 103 or the lower straightening roller 104 contacts the W-shaped steel 200 for straightening.

[0062] In other embodiments, please refer to Figures 7 to 10 Alternatively, the W-shaped steel straightening mechanism may also include a first lifting frame 109, a second lifting frame 110, a second guide rod 111, an upper rolling element 112, a lower rolling element 113, a guide frame 114, a linear guide rail 115, and an elastic element 117. The linear guide rail 115 is fixedly mounted on the frame 310, and the base 1011 is fixedly connected to the moving parts of the linear guide rail 115. The drive device 102 is mounted on the frame 310, and the output end of the drive device 102 is connected to the base 1011. The drive device 102 drives the base 1011 to move in the direction toward or away from the W-shaped steel 200. In this embodiment, the drive device 102 is an automated linear actuator, such as a cylinder, hydraulic cylinder, electric cylinder, or electro-hydraulic push rod, preferably an electro-hydraulic push rod. In other embodiments, a manually operated ball screw assembly may also be used.

[0063] Please see Figure 7 and Figure 8 Two second light rods 111 are provided and fixedly installed on the base 1011. The first lifting frame 109 is slidably connected to the first light rod 1012, and the second lifting frame 110 is slidably connected to the second light rod 111. The upper straightening roller seat 105 is fixedly connected to the first lifting frame 109, and the lower straightening roller seat 106 is fixedly connected to the second lifting frame 110.

[0064] The upper straightening roller shaft 107 is equipped with upper rolling elements 112 that can rotate relative to it at both ends, and the lower straightening roller shaft 116 is equipped with lower rolling elements 113 that can rotate relative to it at both ends; both the upper rolling elements 112 and the lower rolling elements 113 are deep groove ball bearings.

[0065] Please see Figure 10 The guide frame 114 is fixedly connected to the frame 310. (See also...) Figure 7 and Figure 10 The guide frame 114 includes an upper guide portion that contacts and cooperates with the upper rolling body 112 and a lower guide portion that contacts and cooperates with the lower rolling body 113. The upper guide portion includes an upper inclined upward section 1141 and an upper horizontal section 1142, and the lower guide portion includes a lower inclined downward section 1143 and a lower horizontal section 1144. Both the upper horizontal section 1142 and the lower horizontal section 1144 are horizontally arranged. As the upper rolling body 112 moves from the end of the upper inclined upward section 1141 away from the end of the upper horizontal section 1142 to the end close to the end of the upper horizontal section 1142, its height gradually decreases, so that the straightening upper roller 103 can gradually descend and contact the W-shaped steel 200. As the lower rolling body 113 moves from the end of the lower inclined downward section 1143 away from the end of the lower horizontal section 1144 to the end close to the end of the lower horizontal section 1144, its height gradually increases, so that the straightening lower roller 104 can gradually rise and contact the W-shaped steel 200.

[0066] Please see Figure 7 and Figure 10 The elastic element 117 is fitted onto the second guide rod 111. The lower end of the elastic element 117 is connected to the second lifting frame 110, and the upper end is connected to the first lifting frame 109. The elastic element 117 can be a compression spring, which provides elastic force, causing the first lifting frame 109 and the second lifting frame 110 to move away from each other. This, in turn, causes the upper straightening roller 103 and the lower straightening roller 104 to move away from each other, giving the upper straightening roller 103 an upward tendency to move, ensuring that the upper straightening roller 103 is always in contact with the lower end face of the upper guide part; it also gives the lower straightening roller 104 a downward tendency to move, ensuring that the lower straightening roller 104 is always in contact with the upper end face of the lower guide part.

[0067] In this way, when the upper straightening roller 103 and the lower straightening roller 104 approach the last rolling roller group, the straightening gap between the upper straightening roller 103 and the lower straightening roller 104 is the largest, which makes it easy for the W-shaped steel 200 to pass through, regardless of whether the W-shaped steel 200 is upturned or downturned.

[0068] In this implementation scheme, when the first end of the W-shaped steel 200 passes through the last set of rolling rolls, regardless of whether the W-shaped steel 200 is upturned or downturned, the drive device 102 can be manually controlled to operate, causing the upper straightening roll 103 and the lower straightening roll 104 to automatically approach the W-shaped steel 200 along the trajectories of the upper and lower guide sections, respectively, thus achieving gradual straightening of the W-shaped steel 200. The contact point between the upper straightening roll 103 or the lower straightening roll 104 and the W-shaped steel 200 continuously changes, so that the straightening force is gradually applied from none to many and from small to large. The warped part of the W-shaped steel smoothly transitions from elastic deformation to plastic deformation, avoiding web indentation, flange cracking, or micro-cracks in the transition zone of the inclined web 210 caused by instantaneous concentrated pressure, ensuring the integrity of the cross-sectional structure and making the deformation more stable. Furthermore, since the direction of the straightening movement is the same as the discharge direction of the W-shaped steel 200, adjusting the straightening movement speed to match the discharge speed of the W-shaped steel 200 will not generate too much resistance to the discharge of the W-shaped steel 200. It adapts to the characteristic that the warp height of the W-shaped steel 200 increases with the discharge distance. By precisely matching the force from the low warp area at the beginning to the high warp area at the end, residual stress is gradually eliminated and stress distribution is released, making the straightening more thorough and the rebound rate low.

[0069] During the gradual movement, the W-shaped steel 200 may warp. One of the upper straightening roller 103 and the lower straightening roller 104 will first contact the W-shaped steel 200 to correct the warping in the corresponding direction. Specifically, if the W-shaped steel 200 warps upwards, the upper straightening roller 103 is in contact with the upper end face of the central web 220 and the outer side of the inclined web 210, and the two upper roller surfaces 1031 restrict the left and right swaying of the W-shaped steel along its width direction; if the W-shaped steel 200 warps downwards, the lower straightening roller 104 is in contact with the lower end face of the central web 220 and the inner side of the inclined web 210, and the two lower roller surfaces 1041 restrict the left and right swaying of the W-shaped steel along its width direction; when the upper rolling body 112 moves to the upper horizontal section 1142, the lower rolling body 113 moves... At the lower horizontal section 1144, the upper straightening roller 103 and the lower straightening roller 104 simultaneously contact the W-shaped steel 200, but do not simultaneously squeeze the W-shaped steel 200 into contact. This guides the W-shaped steel 200 toward the cutting die 410, forming a circumferential bidirectional constraint that completely restricts the left and right swing of the W-shaped steel 200 along the width direction. This avoids lateral displacement caused by the superposition of straightening and movement, allowing the first end of the W-shaped steel 200 to accurately enter the cutting opening 411 of the cutting die 410, further ensuring the straightness accuracy of subsequent cutting.

[0070] Since the W-shaped steel 200 has been repaired by the straightening mechanism before entering the cutting die 410, it can enter the cutting opening 411 stably and accurately, thereby ensuring the cutting length accuracy and cross-sectional perpendicularity.

[0071] It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept, and these all fall within the scope of protection of this invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

[0072] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0073] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0074] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

Claims

1. A method for straightening W-shaped steel, characterized in that, The W-shaped steel straightening mechanism includes a straightening frame (101), a driving device (102), an upper straightening roller (103), and a lower straightening roller (104). Both the upper straightening roller (103) and the lower straightening roller (104) can rotate relative to the straightening frame (101); and the upper straightening roller (103) is located above the lower straightening roller (104), forming a straightening gap between them for the W-shaped steel (200) to pass through; The straightening upper roller (103) has two upper roller surfaces (1031) that are adapted to the outer surfaces of the two inclined webs (210) of the W-shaped steel (200). The straightening lower roller (104) has two lower roller surfaces (1041) that are adapted to the inner surfaces of the two inclined webs (210) of the W-shaped steel (200). When the first end of the rolled W-shaped steel (200) enters the straightening gap: if the W-shaped steel (200) tilts upward, the driving device (102) drives the upper straightening roller (103) to descend, so that the two upper roller surfaces (1031) press against the outer surfaces of the two inclined webs (210) of the W-shaped steel (200) to eliminate the warping; if the W-shaped steel (200) tilts downward, the driving device (102) drives the lower straightening roller (104) to rise, so that the two lower roller surfaces (1041) press against the inner surfaces of the two inclined webs (210) of the W-shaped steel (200) to eliminate the warping; The upper straightening roller (103) has an upper central roller surface (1032) adapted to the upper end face of the central web (220) of the W-shaped steel (200). When the upper roller surface (1031) presses against the outer side of the two inclined webs (210) of the W-shaped steel (200), the upper central roller surface (1032) simultaneously presses against the upper end face of the central web (220) of the W-shaped steel (200) to eliminate warping. The lower straightening roller (104) has a lower central roller surface (1042) adapted to the lower end face of the central web (220) of the W-shaped steel (200). When the lower roller surface (1041) presses against the inner side of the two inclined webs (210) of the W-shaped steel (200), the lower central roller surface (1042) simultaneously presses against the lower end face of the central web (220) of the W-shaped steel (200) to eliminate warping. It also includes an upper straightening roller seat (105), a lower straightening roller seat (106), an upper straightening roller shaft (107), and a lower straightening roller shaft (116). The upper straightening roller shaft (107) is fixedly connected to the upper straightening roller seat (105). The upper straightening roller (103) is rotatably mounted on the upper straightening roller shaft (107). The lower straightening roller shaft (116) is fixedly connected to the lower straightening roller seat (106). The lower straightening roller (104) is rotatably mounted on the lower straightening roller shaft (116). The straightening frame (101) includes a base (1011) and a first guide rod (1012). At least two first guide rods (1012) are provided and fixedly mounted on the base (1011). It also includes an integrated lifting frame (108), which is slidably connected to the first guide rod (1012). The upper correction roller seat (105) and the lower correction roller seat (106) are both fixedly connected to the integrated lifting frame (108). The correction frame (101) also includes an upper connecting plate (1013), which is fixedly connected to the upper part of each first guide rod (1012). The drive device (102) is installed on the upper connecting plate (1013), and the output end of the drive device (102) is connected to the integrated lifting frame (108).

2. A method for straightening W-shaped steel, characterized in that, The W-shaped steel straightening mechanism includes a straightening frame (101), a driving device (102), an upper straightening roller (103), and a lower straightening roller (104). Both the upper straightening roller (103) and the lower straightening roller (104) can rotate relative to the straightening frame (101); and the upper straightening roller (103) is located above the lower straightening roller (104), forming a straightening gap between them for the W-shaped steel (200) to pass through; The straightening upper roller (103) has two upper roller surfaces (1031) that are adapted to the outer surfaces of the two inclined webs (210) of the W-shaped steel (200). The straightening lower roller (104) has two lower roller surfaces (1041) that are adapted to the inner surfaces of the two inclined webs (210) of the W-shaped steel (200). When the first end of the rolled W-shaped steel (200) enters the straightening gap: if the W-shaped steel (200) tilts upward, the driving device (102) drives the upper straightening roller (103) to descend, so that the two upper roller surfaces (1031) press against the outer surfaces of the two inclined webs (210) of the W-shaped steel (200) to eliminate the warping; if the W-shaped steel (200) tilts downward, the driving device (102) drives the lower straightening roller (104) to rise, so that the two lower roller surfaces (1041) press against the inner surfaces of the two inclined webs (210) of the W-shaped steel (200) to eliminate the warping; The upper straightening roller (103) has an upper central roller surface (1032) adapted to the upper end face of the central web (220) of the W-shaped steel (200). When the upper roller surface (1031) presses against the outer side of the two inclined webs (210) of the W-shaped steel (200), the upper central roller surface (1032) simultaneously presses against the upper end face of the central web (220) of the W-shaped steel (200) to eliminate warping. The lower straightening roller (104) has a lower central roller surface (1042) adapted to the lower end face of the central web (220) of the W-shaped steel (200). When the lower roller surface (1041) presses against the inner side of the two inclined webs (210) of the W-shaped steel (200), the lower central roller surface (1042) simultaneously presses against the lower end face of the central web (220) of the W-shaped steel (200) to eliminate warping. It also includes an upper straightening roller seat (105), a lower straightening roller seat (106), an upper straightening roller shaft (107), and a lower straightening roller shaft (116). The upper straightening roller shaft (107) is fixedly connected to the upper straightening roller seat (105). The upper straightening roller (103) is rotatably mounted on the upper straightening roller shaft (107). The lower straightening roller shaft (116) is fixedly connected to the lower straightening roller seat (106). The lower straightening roller (104) is rotatably mounted on the lower straightening roller shaft (116). The straightening frame (101) includes a base (1011) and a first guide rod (1012). At least two first guide rods (1012) are provided and fixedly mounted on the base (1011). It also includes a first lifting frame (109), a second lifting frame (110), a second guide rod (111), an upper rolling element (112), a lower rolling element (113), a guide frame (114), and a linear guide rail (115). The base (1011) is fixedly connected to the moving parts of the linear guide rail (115). The output end of the drive device (102) is connected to the base (1011). The drive device (102) drives the base (1011) to move in the direction of conveying the W-shaped steel (200) towards or away from it. The second guide rod (111) is provided with at least two... Each is fixedly installed on the base (1011). The first lifting frame (109) is slidably connected to the first guide rod (1012), and the second lifting frame (110) is slidably connected to the second guide rod (111). The upper straightening roller seat (105) is fixedly connected to the first lifting frame (109), and the lower straightening roller seat (106) is fixedly connected to the second lifting frame (110). The upper straightening roller shaft (107) has upper rolling bodies (112) that can rotate relative to it installed at both ends, and the lower straightening roller shaft (116) has lower rolling bodies (113) that can rotate relative to it installed at both ends. The guide frame (114) is fixedly connected to the frame (310). The guide frame (114) includes an upper guide part that contacts and cooperates with the upper rolling element (112) and a lower guide part that contacts and cooperates with the lower rolling element (113). The upper guide part includes an upper inclined upward section (1141) and an upper horizontal section (1142). The lower guide part includes a lower inclined downward section (1143) and a lower horizontal section (1144). The upper horizontal section (1142) and the lower horizontal section (1144) are both horizontally arranged. The upper rolling element (112) moves from the upper inclined downward section to the lower horizontal section (1143). As the upper section (1141) moves from the end furthest from the upper horizontal section (1142) to the end closest to the upper horizontal section (1142), its height gradually decreases, allowing the upper straightening roller (103) to gradually descend and contact the W-shaped steel (200); as the lower rolling body (113) moves from the lower layer to the end furthest from the lower horizontal section (1144) to the end closest to the lower horizontal section (1144), its height gradually increases, allowing the lower straightening roller (104) to gradually rise and contact the W-shaped steel (200).

3. The straightening method for W-shaped steel according to claim 2, characterized in that, It also includes an elastic element (117), the lower end of which is connected to the second lifting frame (110) and the upper end of which is connected to the first lifting frame (109). The elastic element (117) provides elastic force to the first lifting frame (109) and the second lifting frame (110) to keep them apart.

Images