Steel straightening machine

Abstract

Compared with existing technologies, the steel profile straightening machine disclosed in this invention can detect the curvature of the web plate after it has been straightened by the web plate straightening arms by setting a curvature detection unit. A heating unit heats the areas with large curvature detected by the curvature detection unit, and then a straightening unit compresses and straightens the heated curved areas. Heating releases internal stress, making it easier to straighten the curved areas and achieving better straightening results. The machine includes a web plate straightening device with multiple sets of web plate straightening arms spaced apart. It also includes: a curvature detection unit located between adjacent sets of web plate straightening arms for detecting the curvature of the web plate; a heating unit located downstream of the curvature detection unit for heating areas where the curvature of the web plate exceeds a predetermined value; and a straightening unit for straightening the heated areas of the web plate.

Description

Technical Field

[0001] This invention relates to the field of straightening technology, and in particular to a steel profile straightening machine. Background Technology

[0002] During the production and use of structural steel, the steel may be bent. In order to ensure the normal use of the structural steel, it is necessary to straighten the steel before production or use.

[0003] Whether it's T-beams or H-beams, the web and flanges are connected by welding during production. To ensure the quality of the steel profiles, the web and flanges are currently straightened before welding, and then welded using welding equipment; for example: [reference needed]. Figure 14 The Chinese invention patent application number is 2020101737970, entitled "A Method for Straightening T-Shaped Steel". It is proposed that by setting up a web straightening device and a panel straightening device, and setting up a conveying device and a welding device, the web and panel can be straightened by the web straightening device and the panel straightening device when the conveying device transports the web and the panel. After straightening, the panels are transported to the welding device for welding, thereby ensuring the production quality of the steel section. This method has a better straightening effect than straightening after welding.

[0004] In the above-mentioned correction method, the web plate correction device corrects the web plate by squeezing it with a web plate correction arm. Since the plate has internal stress, when there is a large bend in the web plate, the bent part will still bend again under the action of internal stress after passing through the correction arm. Local bending will affect the welding quality. Summary of the Invention

[0005] The purpose of this invention is to solve the above-mentioned problems by providing a steel straightening machine that can detect the curvature of the web, heat the part with large curvature based on the detected curvature value, and perform local straightening of the heated part through a straightening unit. Heating can eliminate internal stress, and the straightening unit can achieve better straightening effect, thus ensuring better straightening of the steel profile.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: a steel profile straightening machine, comprising a web straightening device, wherein the web straightening device comprises multiple sets of web straightening arms arranged at intervals, and further comprising:

[0007] A curvature detection unit is disposed between two adjacent sets of web plate correction arms and is used to detect the curvature of the web plate.

[0008] A heating unit is located downstream of the curvature detection unit and is used to heat the area where the web curvature exceeds a predetermined value.

[0009] The correction unit corrects the area of ​​the web that has been heated.

[0010] Furthermore, the curvature detection unit includes a vertically arranged mounting plate and a displacement detection component disposed on the mounting plate, the mounting plate being configured to move in directions toward and away from the web.

[0011] Furthermore, the displacement detection assembly includes a detection rod and a displacement detection sensor guided on the mounting plate. The detection rod has detection ends and limiting plates located on both sides of the mounting plate, and a first elastic element between the limiting plate and the mounting plate.

[0012] Furthermore, two first pins are vertically spaced on the mounting plate. Each first pin is hinged to a rigid rod. The other ends of the two rigid rods are hinged to the web plate straightening device through second pins. The first connecting line connecting the axes of the two first pins is parallel and equal to the second connecting line connecting the axes of the two second pins.

[0013] Furthermore, on the side of the rigid rod away from the heating unit, the web plate straightening device is provided with a limiting part adapted to the rigid rod, and at least one of the rigid rods and the web plate straightening device is provided with a second elastic element, which can provide the rigid rod with an elastic force that abuts against the limiting part.

[0014] Furthermore, a first support plate is provided at the edge of the web plate straightening device, and the second pin is rotatably mounted on the first support plate. A locking component is provided between the first support plate and the second pin, and the locking component can lock the second pin when the curvature detection unit is working.

[0015] Furthermore, the heating unit includes:

[0016] The second support is located at the edge of the web plate correction device;

[0017] The telescopic arm is horizontally mounted on the second support.

[0018] A vertical plate is installed at the end of the telescopic arm, and an eddy current heating element is installed on the side of the vertical plate away from the telescopic arm.

[0019] Furthermore, the vertical plate is provided with supporting rollers on both the upper and lower sides of the eddy current heating element, and the axes of the two supporting rollers are vertically coaxial; the distance from the contact point between the supporting roller and the web plate to the vertical plate is greater than the thickness of the eddy current heating element.

[0020] Furthermore, the eddy current heating element is electrically connected to the curvature detection unit, and is used to control the heating time according to the detection value of the curvature detection unit.

[0021] Furthermore, the correction unit includes:

[0022] Support plates, including two parallel and spaced apart on both sides of the web correction device;

[0023] The straightening roller assembly includes two sets of straightening rollers respectively set on two support plates. Each set of straightening rollers includes two straightening rollers set vertically. Each straightening roller is connected to two ends of a power telescopic rod, and the other end of the power telescopic rod is slidably engaged with the support plate.

[0024] The drive assembly is horizontally positioned between the straightening roller group and the support plate, and is used to drive the straightening roller group to slide in the horizontal direction.

[0025] The steel straightening machine disclosed in this invention has the following advantages compared with the prior art: by setting a curvature detection unit, the curvature of the web plate after being straightened by the web plate straightening arm can be detected; by using a heating unit, the area with a large curvature detected by the curvature detection unit is heated; and then by using a straightening unit, the heated curved area is squeezed and straightened. Heating can release internal stress, making it easier to straighten the curved area and achieve a better straightening effect. It includes a web plate straightening device, multiple sets of web plate straightening arms arranged at intervals in the web plate straightening device, and further includes: a curvature detection unit, which is set between two adjacent sets of web plate straightening arms, for detecting the curvature of the web plate; a heating unit, which is set downstream of the curvature detection unit, for heating the area of ​​the web plate where the curvature exceeds a predetermined value; and a straightening unit, for straightening the heated area of ​​the web plate. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the steel straightening machine of the present invention. Figure 1 .

[0027] Figure 2 This is a schematic diagram of the overall structure of the steel straightening machine of the present invention. Figure 2 .

[0028] Figure 3 This is a top view of the bending detection unit in the steel straightening machine of the present invention.

[0029] Figure 4 for Figure 2 The diagram shows a partially enlarged internal structure of point A in the steel straightening machine of the present invention.

[0030] Figure 5 for Figure 4 The diagram shows a partially enlarged structural schematic of section A-1 in the steel straightening machine of the present invention.

[0031] Figure 6 for Figure 2 The diagram shows a partially enlarged internal structure of section B in the steel straightening machine of the present invention.

[0032] Figure 7 For the present invention Figure 6 A partial structural diagram.

[0033] Figure 8 This is a partially enlarged structural diagram of the transmission component in the steel straightening machine of the present invention.

[0034] Figure 9 This is an enlarged structural diagram of the interior of the bottom shell of the steel straightening machine of the present invention.

[0035] Figure 10 This is an enlarged structural schematic diagram of the heating unit in the steel straightening machine of the present invention.

[0036] Figure 11 This is a schematic diagram of the enlarged structure of the straightening unit in the steel straightening machine of the present invention. Figure 1 .

[0037] Figure 12 This is a schematic diagram of the enlarged structure of the straightening unit in the steel straightening machine of the present invention. Figure 2 .

[0038] Figure 13 This is a schematic diagram of the cross-sectional structure of the straightening unit in the steel straightening machine of the present invention.

[0039] Figure 14 This is a structural schematic diagram of a T-shaped steel straightening method in the background art.

[0040] In the diagram: 1. Bending detection unit; 10. Mounting plate; 11. Displacement detection assembly; 110. First plate; 111. Detection rod; 1110. Detection end; 1112. Limiting plate; 112. Displacement detection sensor; 1121. Sensor; 1122. Measuring rod; 113. First elastic element; 114. Protective shell; 1141. Annular partition plate; 115. Detection wheel; 116. First piezoelectric element; 117. Second piezoelectric element; 118. Second... Compression spring; 119, annular plate; 1191, guide rod; 1192, permanent magnet; 1193, impact component; 12, first pin; 13, rigid rod; 130, connecting sleeve; 131, limiting part; 14, second elastic element; 141, third pin; 142, fourth pin; 17, locking assembly; 170, outer shell; 171, gear ring; 172, spacer sleeve; 173, transmission component; 174, locking bevel gear; 1730, gear shaft; 173 1. First gear; 1732. Cylindrical housing; 1733. Impeller; 1734. Second gear; 1735. Cavity; 1736. Flow channel; 175. First friction plate; 176. Second friction plate; 1761. Friction plate base plate; 1762. Third elastic element; 1763. Piezoelectric stack; 177. Bottom shell; 1771. Guide rod; 1772. Limiting nut; 178. Electromagnet; 18. Second pin; 19. First bracket; 19 1. First support plate; 2. Heating unit; 21. Second bracket; 22. Telescopic arm; 23. Vertical plate; 24. Eddy current heating element; 25. Support roller; 3. Correction unit; 31. Support plate; 310. Connecting plate; 311. Strip hole; 32. Correction roller group; 320. Correction roller; 321. Power telescopic rod; 33. Drive assembly; 331. Screw nut; 332. Sliding sleeve; 333. Screw; 334. Servo motor; 9. Web plate correction device. Detailed Implementation

[0041] The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams, illustrating only the basic structure of the invention in a schematic manner, and therefore only show the components relevant to the invention.

[0042] This application provides a steel profile straightening machine, as a specific embodiment, see reference. Figure 1 , Figure 2 It includes a webbed correction device 9, and multiple sets of webbed correction arms spaced apart from each other in the webbed correction device 9, and further includes:

[0043] The curvature detection unit 1 is disposed between two adjacent sets of web plate correction arms and is used to detect the curvature of the web plate.

[0044] Heating unit 2 is located downstream of curvature detection unit 1 and is used to heat the area where the web curvature exceeds a predetermined value.

[0045] Correction unit 3 corrects the area of ​​the web that has been heated.

[0046] For details, please refer to Figure 14 It should be noted that the web straightening device 9 in this application is basically the same in structure as the web straightening device in a T-shaped steel straightening method in the background art. It can transmit web movement through a transmission unit and squeeze and straighten the web through multiple sets of spaced web straightening arms. The difference from the background art is that this application sets a curvature detection unit 1 between two adjacent sets of web straightening arms. The curvature detection unit detects the curvature of the web passing through the straightening arm. Along the transmission direction of the web, a heating unit 2 and a straightening unit 3 are set between the next adjacent set of straightening arms. The heating unit 2 is connected to the curvature detection unit 1 and can obtain the position and distance of excessive curvature. According to the transmission speed of the transmission unit, the heating unit 2 starts working when the area of ​​excessive curvature reaches the heating unit 2 to heat the area of ​​excessive curvature. Similarly, when the area of ​​excessive curvature reaches the straightening unit 3, the straightening unit 3 corrects the curvature position to achieve the effect of correcting the area of ​​excessive curvature.

[0047] Specifically, in some embodiments, the heating unit can also control the heating power according to the degree of curvature. The greater the curvature, the greater the heating power of the heating unit 2, and the smaller the curvature, the smaller the heating power, so as to ensure the heating effect on the web plate and thus achieve a better correction effect.

[0048] In some embodiments, the conveying unit is connected to the curvature detection unit 1. The conveying unit can control the conveying speed according to the detection value of the curvature detection unit 1. The greater the curvature, the slower the conveying speed of the conveying unit. The smaller the curvature, the constant conveying speed, so as to ensure the heating effect on the web plate and thus achieve a better correction effect.

[0049] Furthermore, as a specific implementation method, refer to Figures 1-3 The curvature detection unit 1 includes a vertically arranged mounting plate 10 and a displacement detection component 11 disposed on the mounting plate 10. The mounting plate 10 is configured to move in directions toward and away from the web.

[0050] Specifically, in the actual production process, the thickness of the web plate varies due to the different types of steel profiles produced. Therefore, the mounting plate 10 is configured to move in the direction of approaching and moving away from the web plate, so that the position of the mounting plate 10 can be adjusted according to the thickness of the web plate to adapt to different thickness plates. The mounting plate can be connected to the web plate straightening device 9 through any connection structure such as a telescopic rod or a swing arm.

[0051] Furthermore, as a specific implementation method, refer to Figure 2 , Figure 4 , Figure 5 The specific structure of the displacement detection component is as follows: the displacement detection component 11 includes a detection rod 111 and a displacement detection sensor 112 that are guided and disposed on the mounting plate 10. The detection rod 111 includes a detection end 1110 and a limiting plate 1112 disposed on both sides of the mounting plate 10, and a first elastic member 113 between the limiting plate 1112 and the mounting plate 10.

[0052] Specifically, in a preferred embodiment, the mounting plate 10 is vertically arranged and its surface is parallel to the conveying direction of the web plate. The detection rod 111 is vertically guided to the mounting plate. A protective shell 114, coaxial with the detection rod, is detachably fixed to the side of the mounting plate 10 away from the web plate. In a specific embodiment, the first elastic element 113 is a compression spring, with one end abutting against the protective shell and the other end abutting against the detection rod 111, causing the limiting plate 1112 to abut against the mounting plate 10. The displacement detection sensor 112 includes a measuring pull rod 1122 connected to the detection rod and a sensor 1121 mounted on the protective shell. The detection end 1110 of the detection rod is connected to a detection wheel. During operation, the detection wheel contacts the web plate to be detected and compresses the first elastic element 113 by a certain displacement, causing the limiting plate 1112 to separate from the mounting plate. The sensor 1121 is used to obtain the initial value, and then the conveying device is controlled to convey the web plate. When the web plate bends, the sensor rod can be squeezed to compress the first elastic element and cause displacement, or the sensor rod can be pushed to move under the elastic force of the first elastic element. At this time, the displacement of the sensor rod can be obtained by obtaining the sensor 1121. Combined with the conveying speed of the conveying device, the bending amplitude and bending direction of the web plate can be obtained. When the bending amplitude is too large to meet the processing requirements, the area with large bending amplitude, bending amplitude and bending distance are conveyed to the heating unit. According to the conveying speed of the conveying unit and the distance between the heating unit and the bending detection unit, the bending position is heated by the heating unit when the area with large bending amplitude reaches the heating unit. Similarly, the bending area is corrected by the correction unit when the bending area reaches the correction unit.

[0053] Furthermore, as a preferred embodiment, a first piezoelectric element 116 is arranged around the sensor 1121 at the bottom of the protective shell 114, and the first elastic element 113 is a compression spring. The end of the first elastic element presses against the first piezoelectric element 116. With this arrangement, when the bending detection unit detects the web, the detection rod can move back and forth in the axial direction, causing the elastic force of the first elastic element to change back and forth, thereby changing the elastic force applied to the first piezoelectric element 116. When the elastic force is large, the deformation of the first piezoelectric element is large, and when the elastic force is small, the deformation is small, thereby causing the first piezoelectric element to undergo periodic deformation, which can generate electrical energy. Thus, the bending of the web can be used to generate electricity and recover energy, thereby generating electricity while detecting bending, saving energy.

[0054] Furthermore, as a specific implementation method, the mounting plate is installed as follows: two first pins 12 are vertically spaced on the mounting plate 10, each of the first pins 12 is hinged to a rigid rod 13, and the other ends of the two rigid rods 13 are hinged to the web plate straightening device through second pins 18. The first connecting line connecting the axes of the two first pins is parallel and equal to the second connecting line connecting the axes of the two second pins 18.

[0055] For details, please refer to Figures 1-3 A first bracket 19 is provided at the edge of the web plate straightening unit. A first support plate 191 is horizontally provided at the top of the first bracket. Two second pins 18 are provided on the first support plate 191. The mounting plate is connected to the first pins 12 via ear plates. The mounting plate is vertically positioned and its surface is parallel to the conveying direction of the web plate. This configuration allows for reference... Figure 3 When dealing with webs of different thicknesses, the rigid rod 13 can be deflected downstream in the web conveying direction. At the same time as the deflection, the mounting plate can be moved away from the web to achieve adjustment. In this way, the mounting plate can always be kept vertical and the plate surface parallel to the web conveying direction when the rigid rod is deflected, so as to ensure that the posture of the detection rod 111 does not change and to ensure the detection accuracy of the bending detection unit.

[0056] Furthermore, as a preferred embodiment, the web plate straightening device is provided with a limiting part 131 adapted to the rigid rod on the side of the rigid rod 13 away from the heating unit 2, and at least one of the rigid rods and the web plate straightening device is provided with a second elastic member 14, which can provide the rigid rod with an elastic force that abuts against the limiting part 131.

[0057] For details, please refer to Figure 3The limiting part 131 is a plate body set on the first support plate 191. When the rigid rod 13 contacts the limiting part 131, the mounting plate 10 is closest to the web plate to be tested. In one specific embodiment, the second elastic element 14 is a gas spring rod. One end of the gas spring rod is connected to the middle area of ​​the rigid rod 13 on the side away from the heating unit 2 through the third pin 141, and the other end is connected to the first support plate 191 through the fourth pin 142. The fourth pin is set on the side of the third pin close to the heating unit. At the same time, the first support plate is also provided with a detection sensor (not shown in the figure) for detecting the deflection angle and deflection direction of the rigid rod 13 around the second pin. An angle sensor and a steering angle sensor can be selected. With the above settings, when detecting the curvature of the web, the detection wheel 115 can be made to contact the web surface under the elastic force of the second elastic element 14, thereby automatically adapting to webs of different thicknesses, making it more convenient and simple to use. During detection, the rigid rod can also be deflected at a certain angle under the elastic force of the second elastic element and the thrust of the web bending position on the detection rod. At this time, the deflection angle and deflection direction can be detected by the detection sensor (not shown in the figure). Combined with the distance between the first and second pins connected at both ends of a rigid rod, the deflection displacement of the mounting plate can be obtained. Combined with the displacement of the detection rod, the curvature of the web can be obtained.

[0058] Furthermore, as a preferred embodiment, refer to Figures 6-8 The edge of the web plate straightening device is provided with a first support plate 191, and the second pin is rotatably mounted on the first support plate. A locking component 17 is provided between the first support plate and at least one second pin. The locking component can lock the second pin when the curvature detection unit 1 is working.

[0059] Specifically, it is understandable that when detecting the curvature of the web, if the rigid rod deflects arbitrarily, it will cause the rigid rod 13 to rotate. Although the curvature of the web can be obtained by acquiring the deflection angle of the rigid rod and the displacement of the detection rod, it will undoubtedly increase the amount of calculation and reduce the detection efficiency. Moreover, when the rigid rod rotates, the mounting plate will also be displaced in the conveying direction of the web, which will cause detection errors and reduce detection accuracy. To address this problem, this application sets a locking component 17 to lock the second pin 18 when the curvature detection unit is working, so that the second pin cannot rotate arbitrarily. The end of the rigid rod is provided with a connecting sleeve 130 adapted to the second pin. The connecting sleeve and the second pin are connected in a non-rotational fit through a transmission key. Through this setting, it can be ensured that the second pin 18 does not rotate during detection, thereby ensuring detection accuracy.

[0060] For details, please refer to Figures 6-9The specific structure of the locking assembly 17 is as follows: it includes an outer housing 170 detachably fixed to the lower surface of the first support plate 191 and coaxial with the second pin 18, a spacer sleeve 172 inserted into the upper end of the outer housing, at least two transmission components 173 evenly spaced around the second pin, and a locking bevel gear 174 disposed at the bottom of the outer housing. The end of the second pin 18 that extends into the spacer sleeve is coaxially provided with a gear ring 171. The transmission component 173 includes a gear shaft 1730 rotatably disposed on the spacer sleeve, a cylindrical housing 1732 rotatably engaged with the gear shaft, and a second pin 174 coaxially disposed at the lower end of the cylindrical housing. Gear 1734, the second gear meshes with locking bevel gear 174, the upper end of gear shaft 1730 is provided with first gear 1731 meshing with gear ring 171, the gear shaft is located inside cylindrical housing 1732 and is provided with impeller 1733, the cylindrical housing 1732 is filled with electromagnetic fluid, at least one connecting channel 1736 is provided on the side wall of cylindrical housing 1732, the two ends of the connecting channel 1736 are connected to the two ends of cylindrical housing 1732, locking bevel gear 174 and outer housing 170 are frictionally engaged by first friction plate 175, so that locking bevel gear 174 does not rotate.

[0061] At least one electromagnet 178 is provided on the side wall of the outer casing 170. The electromagnet 178 is powered and connected to the first piezoelectric element 116. The electromagnet 178 is also connected to a displacement detection sensor. With this arrangement, when the conveying device starts conveying the web plate, the curvature detection unit starts detection. At this time, the displacement detection sensor can detect the displacement change and start powering the electromagnet 178. The electromagnet 178 is also powered by the mains power and can also be powered by the electrical energy generated by the first piezoelectric element 116, thus making full use of the electrical energy generated by the first piezoelectric element. When the electromagnet is energized, it can generate magnetism, so that the cylindrical shell 1732 is in the magnetic field range. At this time, the electromagnet fluid inside the cylindrical shell 1732 is in the magnetic field range, and its fluidity decreases. When the cylindrical housing 1732 rotates relative to the gear shaft 1730, the impeller 1733 drives the internal electromagnetic fluid to flow from the connecting channel 1736, forming a circulation from one end of the cylindrical housing 1732 to the other end. At this time, the fluid flow of the electromagnetic fluid is poor, so the resistance to the relative rotation between the cylindrical housing and the gear shaft 1730 is large, thus causing the gear shaft and the cylindrical housing to rotate relative to each other. At this time, the transmission component 173 drives the locking bevel gear 174, thereby achieving the purpose of locking the second pin. When the bending degree detection unit 1 does not perform detection, the electromagnet 178 is not energized, and no magnetic field is generated. At this time, the fluid flow of the electromagnetic fluid is good, and the gear shaft 1730 and the cylindrical housing 1732 can rotate relative to each other smoothly, releasing the second pin 18.

[0062] Furthermore, by connecting the electromagnet 178 and the displacement detection sensor 112, when the web plate bends to a point that exceeds the detection range, the electromagnet can be de-energized in time, so that the locking component 17 can release the second pin in time, allowing the rigid rod to deflect and avoid damage to the displacement detection component 11.

[0063] Furthermore, it is understandable that, due to the hysteresis magnetism of the electromagnet, the locking assembly cannot release the second pin in a timely manner after the electromagnet is de-energized. At this time, if the web plate's transmission speed is too high, it may damage the displacement detection assembly 11. To further improve safety, refer to... Figure 5 A first plate 110 is provided in the middle area of ​​the measuring rod 1122. The first plate 110 is located near the mounting plate 10. An annular partition plate 1141 is integrally provided on the inner side of the protective shell. An annular plate 119 is provided between the annular partition plate and the first plate. A guide rod 1191 is provided on the annular plate to guide and cooperate with the annular partition plate. A second compression spring 118 is provided between the annular plate 119 and the limiting plate 1112. The elastic coefficient of the second compression spring is less than that of the first elastic element 113. A permanent magnet 1192 is provided on the annular partition plate to magnetically cooperate with the annular plate 119. A second piezoelectric element 117 is provided on the side of the annular partition plate 1141 near the mounting plate 10. An impact element 1193 is provided at the end of the guide rod 1191. With the above arrangement, the initial state of the displacement detection component 11 when not in operation is as follows: Figure 5 As shown, at this time, under the elastic force of the first elastic element, the first plate 110 pushes the annular plate 119 against the annular partition plate 1141. At this time, the second compression spring is in a compressed state. When the displacement detection assembly performs detection work, the detection rod undergoes displacement change, driving the measuring rod 1122 to move. Taking the bending of the web plate to squeeze the detection rod and thus squeeze the first elastic element as an example, the first plate 110 leaves the annular plate. At this time, under the magnetic attraction of the permanent magnet, the annular plate 119 does not move, causing the second compression spring to compress. When the curvature of the web does not exceed the detection range, the elastic force of the second compression spring is less than the magnetic attraction force between the permanent magnet and the annular plate. When the curvature of the web exceeds the range, the compression of the second compression spring also increases. The elastic force of the second compression spring is greater than the magnetic attraction force of the permanent magnet on the annular plate. Then the annular plate 119 separates from the annular partition plate 1141. Under the action of the elastic force of the second compression spring, the annular plate moves rapidly, driving the guide rod 1191 to move rapidly, so that the impact member 1193 impacts the second piezoelectric member 117 to generate electrical energy.

[0064] Continue to refer to Figure 7 , Figure 9A bottom shell 177 is provided at the bottom of the outer shell 170. A locking bevel gear 174 is rotatably mounted at the bottom of the outer shell 170 via a second rotating shaft, and the second rotating shaft is axially anti-movement fitted with the bottom of the outer shell. A first friction plate 175 is located at the lower end of the second rotating shaft. Multiple guide rods 1771 are provided around the bottom of the bottom shell 177 around the second pin 18. The multiple guide rods are guided and fitted with the friction plate bottom plate 1761. A second friction plate 176 adapted to the first friction plate is provided on the friction plate bottom plate 1761. A third elastic element 1762 is sleeved on each guide rod. The third elastic element is located between the bottom of the bottom shell and the friction plate bottom plate 1761. An annular piezoelectric stack 1763 is also sleeved on each guide rod above the friction plate bottom plate 1761. A limit nut 1772 is threaded to the end of the guide rod. The piezoelectric stack 1763 is compressed by the limit nut 1772. The stacked piezoelectric stack 1763 applies pressure to the base plate 1761 of the friction plate and compresses the third elastic element 1762. At this time, under the elastic force of the third elastic element, the second friction plate comes into contact with the first friction plate, thereby circumferentially limiting the locking bevel gear 174. The piezoelectric stack 1763 is electrically connected to the second piezoelectric element 117. With this arrangement, when the web bending exceeds the travel, the second piezoelectric element 117 can be impacted and undergo compressive deformation, generating instantaneous electrical energy. At this time, instantaneous electrical energy can be applied to the piezoelectric stack in the first instant, causing the piezoelectric stack to undergo elongation deformation, thereby pushing the second friction plate to move away from the first friction plate by a certain displacement, separating the first friction plate and the second friction plate or reducing the friction between them, thereby reducing the deflection resistance of the rigid rod. In this way, the displacement detection component 11 can be protected during the hysteresis time of the electromagnet, reducing the probability of damage.

[0065] Furthermore, as a preferred embodiment, refer to Figure 2 The curvature detection unit 1 includes two sets symmetrically arranged on both sides of the web to be detected. By combining the two sets of curvature detection units, the curvature detection of the web in different directions can be carried out, achieving better detection results.

[0066] Furthermore, as a specific implementation method, refer to Figure 1 , Figure 10 The heating unit 2 includes:

[0067] The second support 21 is located at the edge of the web plate correction device;

[0068] The telescopic arm 22 is horizontally mounted on the second support 21;

[0069] A vertical plate 23 is provided at the end of the telescopic arm 22, and an eddy current heating element 24 is provided on the side of the vertical plate away from the telescopic arm.

[0070] Specifically, the telescopic arm can be either an electric telescopic arm or an elastic telescopic arm, and the telescopic direction is perpendicular to the transmission direction of the web. An elastic telescopic arm is preferred, as it can automatically extend and retract according to the reaction force of the web and automatically adapt to the bending position. Alternatively, an electric telescopic arm made of an electric telescopic rod can be used. When using an electric telescopic rod, it is connected to a bending degree detection unit, so that the length can be automatically adjusted according to the bending degree of the web to adapt to the bending of the web.

[0071] Furthermore, as a specific implementation method, refer to Figure 10 The vertical plate 23 is equipped with supporting rollers 25 on both the upper and lower sides of the eddy current heating element 24, with the axes of the two supporting rollers vertically coaxial. The distance from the contact point between the supporting roller and the web plate to the vertical plate is greater than the thickness of the eddy current heating element. When the telescopic arm is configured as an elastic telescopic arm, the two supporting rollers 25 on the vertical plate 23 allow the supporting rollers to contact the web plate surface, maintaining a suitable distance between the eddy current heating element 24 and the web plate surface, avoiding sliding friction, and improving service life. Since the eddy current heating element utilizes eddy current heating, it can still effectively heat even at a suitable distance from the web plate.

[0072] Furthermore, as a preferred embodiment, the eddy current heating element is electrically connected to the curvature detection unit 1, and is used to control the heating duration based on the detection value of the curvature detection unit. With this configuration, the curvature detection unit 1 can detect the curvature amplitude and span of the web, thereby enabling the eddy current heating element to control the heating power and heating duration based on the detection value of the curvature detection unit; the longer the span of the curvature portion of the web, the longer the heating duration.

[0073] Furthermore, as a specific implementation method, refer to Figures 11-13 The correction unit 3 includes:

[0074] Support plate 31 includes two parallel plates spaced apart on both sides of the web correction device;

[0075] The straightening roller group 32 includes two groups disposed on two support plates. Each straightening roller group includes two vertically arranged straightening rollers 320. Both ends of each straightening roller 320 are connected to a power telescopic rod 321, and the other end of the power telescopic rod 321 is slidably engaged with the support plate 31.

[0076] The drive assembly 33 is horizontally positioned between the straightening roller group and the support plate, and is used to drive the straightening roller group 32 to slide in the horizontal direction.

[0077] As a specific implementation method, refer to Figure 1 , Figures 11-13The straightening unit includes two spaced-apart support plates 31 and two connecting plates 310 connecting the upper and lower ends of the support plates. The support plates and connecting plates form a rectangular frame structure, which has good stability and high structural strength. Each support plate 31 has two spaced-apart slots 311. The drive assembly 33 includes two lead screws 333 corresponding to the two slots. Each lead screw is connected to a servo motor 334. One power telescopic rod of each straightening roller group is connected to a lead screw nut 331, and the other power telescopic rod is connected to a sliding sleeve 332. The lead screw nut is threaded to one lead screw, and the sliding sleeve is guided and slidably engaged with the other lead screw. The lead screw nuts of the two sets of straightening roller groups on each support plate 31 are staggered. With this configuration on the lead screw, the positions of the two sets of straightening rollers on each support plate can be adjusted individually. The straightening amplitude can be adjusted by extending and shortening the power telescopic rod 321, preferably a hydraulic telescopic rod. Specifically, during straightening, two straightening roller sets on one support plate 31 are spaced apart, while one straightening roller set on another support plate 31 is positioned between the two spaced-apart straightening roller sets. The power telescopic rod of the other straightening roller set retracts and does not participate in the straightening work. When the web passes through three straightening roller sets, the two spaced-apart straightening roller sets support the web, and the straightening roller set positioned between the two spaced-apart straightening roller sets presses against the bent and protruding parts of the web, thus achieving the straightening effect. The direction of the two spaced-apart straightening roller sets can be selected according to the bending direction of the web, and the interval between the two spaced-apart straightening roller sets can be adjusted according to the thickness of the web, thus adjusting the extension length of the power telescopic rod.

[0078] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A steel profile straightening machine, comprising a web straightening device, wherein the web straightening device comprises multiple sets of web straightening arms arranged at intervals, characterized in that, Also includes: A curvature detection unit (1) is set between two adjacent sets of web plate correction arms and is used to detect the curvature of the web plate. Heating unit (2) is located downstream of curvature detection unit (1) and is used to heat the area where the web curvature exceeds a predetermined value; Correction unit (3) corrects the area of ​​the web that has been heated; The curvature detection unit (1) includes a vertically arranged mounting plate (10) and a displacement detection component (11) disposed on the mounting plate (10). The mounting plate (10) is configured to move in directions toward and away from the web. The displacement detection assembly (11) includes a detection rod (111) and a displacement detection sensor (112) guided on the mounting plate (10). The detection rod (111) is provided with a detection end (1110) and a limiting plate (1112) located on both sides of the mounting plate (10). A first elastic element (113) is provided between the limiting plate (1112) and the mounting plate (10). The mounting plate (10) is vertically spaced with two first pins (12), each of which is hinged to a rigid rod (13). The other ends of the two rigid rods (13) are hinged to the web plate straightening device through second pins. The first connecting line connecting the axes of the two first pins is parallel and equal to the second connecting line connecting the axes of the two second pins. The edge of the web plate straightening device is provided with a first support plate (191), and the second pin is rotatably mounted on the first support plate. A locking component (17) is provided between the first support plate and the second pin. The locking component can lock the second pin when the bending detection unit (1) is working. The locking assembly includes a housing detachably fixed to the lower surface of the first support plate and coaxial with the second pin, a spacer sleeve inserted into the upper end of the housing, at least two transmission components evenly spaced around the second pin, and a locking bevel gear located at the bottom of the housing. The end of the second pin extending into the spacer sleeve is coaxially provided with a gear ring. The transmission components include a gear shaft rotatably mounted on the spacer sleeve, a cylindrical housing rotatably engaged with the gear shaft, and a second gear coaxially located at the lower end of the cylindrical housing. The second gear meshes with the locking bevel gear. The upper end of the gear shaft is provided with a first gear meshing with the gear ring. The gear shaft is located inside the cylindrical housing and is provided with a paddle wheel. The cylindrical housing is filled with an electromagnetic fluid. At least one connecting channel is provided on the side wall of the cylindrical housing, and the two ends of the connecting channel are connected to the two ends of the cylindrical housing. The locking bevel gear and the housing are in frictional engagement through a first friction plate. At least one electromagnet is provided on the side wall of the housing. The electromagnet is powered and connected to a first piezoelectric element and is connected to a displacement detection sensor.

2. The steel straightening machine according to claim 1, characterized in that, Located on the side of the rigid rod (13) away from the heating unit (2), the web plate straightening device is provided with a limiting part (131) adapted to the rigid rod, and at least one of the rigid rods and the web plate straightening device is provided with a second elastic member (14), which can provide the rigid rod with an elastic force that abuts against the limiting part (131).

3. The steel profile straightening machine according to claim 1, characterized in that, The heating unit (2) includes: The second support (21) is located at the edge of the web correction device; The telescopic arm (22) is horizontally mounted on the second support (21); A vertical plate (23) is provided at the end of the telescopic arm (22), and an eddy current heating element (24) is provided on the side of the vertical plate away from the telescopic arm.

4. The steel profile straightening machine according to claim 3, characterized in that, The vertical plate (23) is provided with support rollers (25) on both the upper and lower sides of the eddy current heating element (24), and the axes of the two support rollers are vertically coaxial; the distance from the contact point between the support roller and the web plate to the vertical plate is greater than the thickness of the eddy current heating element.

5. The steel profile straightening machine according to claim 3, characterized in that, The eddy current heating element is electrically connected to the curvature detection unit (1) and is used to control the heating time according to the detection value of the curvature detection unit.

6. The steel profile straightening machine according to claim 1, characterized in that, The correction unit (3) includes: Support plates (31) include two that are parallel to each other and spaced apart on both sides of the web correction device; The straightening roller group (32) includes two groups disposed on two support plates. Each straightening roller group includes two vertically arranged straightening rollers (320). Both ends of each straightening roller (320) are connected to a power telescopic rod (321). The other end of the power telescopic rod (321) is slidably engaged with the support plate (31). The drive assembly (33) is horizontally positioned between the straightening roller group and the support plate, and is used to drive the straightening roller group (32) to slide in the horizontal direction.

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