Section steel straightening machine

Abstract

Compared with the prior art, the profile steel straightening machine disclosed by the invention has the advantages that the bending degree detection unit is arranged to carry out bending degree detection on a web plate which is straightened by the web plate straightening arm, and the heating unit is used for heating a part which is detected by the bending degree detection unit and has relatively large bending degree; then the heated bent position is extruded and corrected through the correction unit, internal stress can be released through heating, and therefore the bent position can be corrected more easily, and a better correction effect is achieved; comprising a web correction device and a plurality of groups of web correction arms arranged at intervals on the web correction device, and further comprises a curvature detection unit arranged between two adjacent groups of web correction arms and used for detecting the curvature of a web; the heating unit is arranged on the downstream of the curvature detection unit and used for heating the area, exceeding the preset value, of the curvature of the web; and the correcting unit is used for correcting the heated area of the web plate.

Description

Technical Field

[0001] The invention relates to the technical field of correction, in particular to a steel correction machine. Background Art

[0002] During the production and use of steel sections, the steel sections may bend. In order to ensure the normal use of the steel sections, the steel sections need to be corrected before production or use.

[0003] Whether it is T-shaped steel or H-shaped steel, the web and flange plates are connected by welding during production. In order to ensure the quality of steel production, the web and flange plates are corrected before welding, and then welded by welding equipment; for example: Fig.14 , application number: 2020101737970, named as a Chinese invention patent of a T-beam correction method, which is provided with a web correction device and a panel correction device, and is provided with a conveying device and a welding device. It can correct the web and the panel through the web correction device and the panel correction device when the conveying device transports them, and then transport them to the welding device for welding after correction, so as to ensure the production quality of the steel section. This method has a better correction effect than correction after welding.

[0004] In the above correction method, the web correction device squeezes and corrects the web through the web correction arm. Since the plate has internal stress, when the web has a large bend, the bent part will rebound and bend under the action of the internal stress after passing through the correction arm. Local bending will affect the welding quality. Summary of the invention

[0005] The purpose of the present invention is to solve the above-mentioned problems and provide a steel section straightening machine that can detect the curvature of the web, heat the parts with large curvature according to the detection value of the curvature detection, and perform local correction on the heated parts through a correction unit. Internal stress can be eliminated by heating, and correction by the correction unit can achieve a better correction effect, thereby ensuring better correction of the steel section.

[0006] To achieve the above object, the technical solution of the present invention is: a steel straightening machine includes a web straightening device, wherein the web straightening device includes a plurality of web straightening arms arranged at intervals, and further includes: A curvature detection unit is disposed between two adjacent groups of web correction arms and is used to detect the curvature of the web; A heating unit, disposed downstream of the curvature detection unit, for heating a region where the web curvature exceeds a predetermined value; The straightening unit straightens the heated area of ​​the web.

[0007] Furthermore, the curvature detection unit includes a vertically arranged mounting plate and a displacement detection assembly arranged on the mounting plate, and the mounting plate is configured to be able to move in a direction approaching and away from the web.

[0008] Furthermore, the displacement detection assembly includes a detection rod and a displacement detection sensor guided on the mounting plate, the detection rod is provided with detection ends and limit plates located on both sides of the mounting plate, and a first elastic member between the limit plate and the mounting plate.

[0009] Furthermore, two first pins are vertically spaced apart on the mounting plate, each of the first pins is hingedly connected to a rigid rod, the other ends of the two rigid rods are hingedly connected to the web correction device through a second pin, and a first connecting line connecting the axes of the two first pins is parallel and equal to a second connecting line connecting the axes of the two second pins.

[0010] Furthermore, a limiting portion adapted to the rigid rod is provided on the web correcting device on the side of the rigid rod away from the heating unit, and a second elastic member is provided between at least one of the rigid rods and the web correcting device, and the second elastic member can provide elastic force to the rigid rod to abut against the limiting portion.

[0011] Furthermore, a first support plate is provided at the edge of the web correction device, the second pin shaft is rotatably provided on the first support plate, a locking assembly is provided between the first support plate and a second pin shaft, and the locking assembly can lock the second pin shaft when the curvature detection unit is working.

[0012] Furthermore, the heating unit comprises: A second bracket is arranged at the edge of the web correction device; A telescopic arm is horizontally arranged on the second bracket; The vertical plate is arranged at the end of the telescopic arm, and an eddy current heating element is arranged on a side of the vertical plate away from the telescopic arm.

[0013] Furthermore, the vertical plate is provided with support rollers on both upper and lower sides of the eddy current heating element, and the axes of the two support rollers are vertically coaxially arranged; the distance from the contact point between the support roller and the web to the vertical plate is greater than the thickness of the eddy current heating element.

[0014] 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.

[0015] Furthermore, the correction unit comprises: Support plates, including two plates arranged in parallel and spaced apart on both sides of the web correcting device; The correction roller group includes two groups arranged on two support plates, each group of correction rollers includes two vertically arranged correction rollers, both ends of each correction roller are connected to a power telescopic rod, and the other end of the power telescopic rod is slidably matched with the support plate; The driving assembly is horizontally arranged between the correction roller group and the support plate, and is used for driving the correction roller group to slide in the horizontal direction.

[0016] Compared with the prior art, the steel section straightening machine disclosed in the present invention has the following beneficial effects: by setting a curvature detection unit, the curvature of the web corrected by the web correcting arm can be detected; the portion with a larger curvature detected by the curvature detection unit is heated by the heating unit; and then the heated bent position is extruded and corrected by the correction unit; internal stress can be released by heating, thereby making it easier to correct the bent portion and achieving a better correction effect. It includes a web correcting device, a plurality of groups of web correcting arms arranged at intervals in the web correcting device, and also includes: a curvature detection unit, which is arranged between two adjacent groups of web correcting arms, and is used to detect the curvature of the web; a heating unit, which is arranged downstream of the curvature detection unit, and is used to heat the region of the web where the curvature exceeds a predetermined value; and a correction unit, which corrects the heated region of the web. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The overall structure of the steel straightening machine of the present invention is shown in FIG. Figure 1 .

[0018] Figure 2 The overall structure of the steel straightening machine of the present invention is shown in FIG. Figure 2 .

[0019] Figure 3 It is a schematic diagram of the top view of the curvature detection unit in the steel straightening machine of the present invention.

[0020] Figure 4 for Figure 2 The diagram shows a partially enlarged structural diagram of the interior of location A in the steel straightening machine of the present invention.

[0021] Figure 5 for Figure 4 The diagram shows a partially enlarged structural diagram of location A-1 in the steel straightening machine of the present invention.

[0022] Figure 6 for Figure 2 The diagram shown is a schematic diagram of the partially enlarged structure of the interior of location B in the steel straightening machine of the present invention.

[0023] Figure 7 For the present invention Figure 6 Schematic diagram of some structures in .

[0024] Figure 8It is a partial enlarged structural schematic diagram of the transmission components in the steel straightening machine of the present invention.

[0025] Fig. 9 It is a schematic diagram of the enlarged structure of the interior of the bottom shell of the steel straightening machine of the present invention.

[0026] Fig.10 It is an enlarged structural schematic diagram of the heating unit in the steel straightening machine of the present invention.

[0027] Fig.11 The enlarged structure diagram of the correction unit in the steel correction machine of the present invention is shown in FIG. Figure 1 .

[0028] Fig.12 The enlarged structure diagram of the correction unit in the steel correction machine of the present invention is shown in FIG. Figure 2 .

[0029] Fig.13 It is a schematic diagram of the cross-sectional structure of the correction unit in the steel correction machine of the present invention.

[0030] Fig.14 It is a structural schematic diagram of a T-steel correction method in the background technology.

[0031] In the figure: 1, bending detection unit; 10, mounting plate; 11, displacement detection assembly; 110, first plate; 111, detection rod; 1110, detection end; 1112, limit plate; 112, displacement detection sensor; 1121, sensor; 1122, measuring pull rod; 113, first elastic member; 114, protective shell; 1141, annular partition plate; 115, detection wheel; 116, first piezoelectric member; 117, second piezoelectric member; 118, second Compression spring; 119, annular plate; 1191, guide rod; 1192, permanent magnet; 1193, impact member; 12, first pin shaft; 13, rigid rod; 130, connecting sleeve; 131, limiting part; 14, second elastic member; 141, third pin shaft; 142, fourth pin shaft; 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. columnar housing; 1733. blade wheel; 1734. second gear; 1735. cavity; 1736. connecting flow channel; 175. first friction plate; 176. second friction plate; 1761. friction plate bottom plate; 1762. third elastic member; 1763. piezoelectric stack; 177. bottom shell; 1771. guide rod; 1772. limit nut; 178. electromagnet; 18. second pin shaft; 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. Driving assembly; 331. Screw nut; 332. Sliding sleeve; 333. Screw; 334. Servo motor; 9. Web correction device. DETAILED DESCRIPTION

[0032] The present invention will now be described in further detail with reference to the accompanying drawings. The accompanying drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and thus only show the components related to the present invention.

[0033] The present application provides a steel straightening machine as a specific implementation method. Figure 1 , Figure 2 , which includes a web correction device 9, a plurality of web correction arms arranged at intervals, and further includes: A curvature detection unit 1 is arranged between two adjacent groups of web correction arms and is used to detect the curvature of the web; A heating unit 2, disposed downstream of the curvature detection unit 1, for heating a region where the web curvature exceeds a predetermined value; The correction unit 3 corrects the heated area of ​​the web.

[0034] Specifically, refer to Fig.14 It should be noted that the web correction device 9 in the present application is basically consistent with the web correction device structure of a T-steel correction method in the background technology, and can transmit the web movement through a transmission unit, and squeeze and correct the web through a plurality of groups of spaced web correction arms. The difference from the background technology is that the present application is provided with a curvature detection unit 1 between two adjacent groups of web correction arms, and the curvature of the web passing through the correction arm is detected by the curvature detection unit. Along the transmission direction of the web, a heating unit 2 and a correction unit 3 are arranged between the next adjacent correction arm groups, wherein the heating unit 2 is connected to the curvature detection unit 1, and can obtain the position and distance of excessive curvature, and according to the transmission speed of the transmission unit, the heating unit 2 can start working when the area with excessive curvature reaches the heating unit 2, and heat the area with excessive curvature. Similarly, when the area with excessive curvature reaches the correction unit 3, the bending position is corrected by the correction unit 3, so as to achieve the effect of correcting the area with excessive curvature.

[0035] Specifically, in some embodiments, the heating unit can also control the heating power according to the size of the curvature. The larger the curvature, the greater the heating power of the heating unit 2, and the smaller the curvature, the smaller the heating power, thereby ensuring the heating effect on the belly plate, thereby achieving a better correction effect.

[0036] In some embodiments, the transmission unit is connected to the curvature detection unit 1, and the transmission unit can control the transmission speed according to the detection value of the curvature detection unit 1. The greater the curvature, the slower the transmission speed of the transmission unit. The smaller the curvature, the unchanged transmission speed, thereby ensuring the heating effect of the belly plate and achieving a better correction effect.

[0037] Further, as a specific implementation method, refer to Figure 1-Figure 3 The curvature detection unit 1 includes a vertically arranged mounting plate 10 and a displacement detection assembly 11 arranged on the mounting plate 10. The mounting plate 10 is configured to be able to move in a direction approaching and away from the web.

[0038] Specifically, in the actual production process, due to the different types of steel sections produced, the thickness of the web is also different. Therefore, the mounting plate 10 is configured to be able to move in the direction close to and away from the web, so that the position of the mounting plate 10 can be adjusted according to the thickness of the web to adapt to plates of different thicknesses, wherein the mounting plate can be connected to the web correction device 9 by any connecting structure such as a telescopic rod and a swing arm.

[0039] Further, as a specific implementation method, refer to Figure 2 , Figure 4 , Figure 5The 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 which are guided and arranged on the mounting plate 10; the detection rod 111 includes a detection end 1110 and a limit plate 1112 which are arranged on both sides of the mounting plate 10; and a first elastic member 113 between the limit plate 1112 and the mounting plate 10.

[0040] Specifically, as a preferred embodiment, the mounting plate 10 is vertically arranged and the plate surface is arranged parallel to the conveying direction of the web, the detection rod 111 is arranged vertically to the mounting plate, and a protective shell 114 coaxial with the detection rod is detachably fixedly arranged on one side of the mounting plate 10 away from the web. As a specific embodiment, the first elastic member 113 is a compression spring, one end of the compression spring abuts on the protective shell, and the other end abuts on the detection rod 111, so that the limit plate 1112 abuts on the mounting plate 10, and the displacement detection sensor 112 includes a measuring pull rod 1122 connected to the detection rod and a sensor 1121 arranged on the protective shell. The detection end 1110 of the detection rod is connected to a detection wheel. When working, the detection wheel contacts the web to be detected, and compresses the first elastic member 113 by a certain displacement, so that the limit plate 1112 is separated from the mounting plate. The detection value of sensor 1121 is obtained as the initial value, and then the conveying device is controlled to convey the web. When the web is bent, the detection rod can be squeezed to compress the first elastic member to cause displacement, or the detection rod can be pushed to cause displacement under the elastic force of the first elastic member. At this time, the displacement of the detection rod is obtained by obtaining the detection value of sensor 1121, and combined with the conveying speed of the conveying device, the bending amplitude and bending direction of the web can be obtained. When the bending amplitude is large and cannot meet the processing requirements, the area with a large bending amplitude, the bending amplitude and the 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 curvature detection unit, the bending position is heated by the heating unit when the area with a large bending amplitude reaches the heating unit. Similarly, when the bending area reaches the correction unit, the bending area is corrected by the correction unit.

[0041] 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 is pressed against the first piezoelectric element 116. Through this arrangement, when the curvature detection unit detects the web, the detection rod can reciprocate axially, so that the elastic force of the first elastic element changes reciprocatingly, 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 and generate electrical energy, thereby utilizing the bending of the web to generate electricity and recover energy, thereby generating electricity while detecting the curvature, saving energy.

[0042] Furthermore, as a specific embodiment, the mounting plate is installed as follows: two first pins 12 are vertically spaced apart on the mounting plate 10, each of the first pins 12 is hingedly connected to a rigid rod 13, the other ends of the two rigid rods 13 are hingedly connected to the web correction device through a second pin 18, and a first connecting line connecting the axes of the two first pins is parallel and equal to a second connecting line connecting the axes of the two second pins 18.

[0043] Specifically, refer to Figure 1-Figure 3 A first bracket 19 is arranged at the edge of the web correction unit, a first support plate 191 is arranged horizontally on the top of the first bracket, two second pins 18 are arranged on the first support plate 191, the mounting plate is arranged with a first pin 12 by connecting the ear plate, the mounting plate is arranged vertically and the plate surface is parallel to the conveying direction of the web, through this arrangement, reference Figure 3 When dealing with webs of different thicknesses, the rigid rod 13 can be deflected downstream in the web conveying direction, and the mounting plate can be moved away from the web while deflecting to achieve adjustment. In this way, the mounting plate can always be kept vertical and the plate surface can be kept parallel to the web conveying direction when the rigid rod is deflected, thereby ensuring that the posture of the detection rod 111 does not change and the detection accuracy of the curvature detection unit is guaranteed.

[0044] Furthermore, as a preferred embodiment, a limiting portion 131 adapted to the rigid rod is provided on the web correction device on the side of the rigid rod 13 away from the heating unit 2, and a second elastic member 14 is provided between at least one of the rigid rods and the web correction device, and the second elastic member can provide elastic force to the rigid rod to abut against the limiting portion 131.

[0045] Specifically, refer to Figure 3The limiting portion 131 is a plate body arranged on the first support plate 191, and when the rigid rod 13 contacts the limiting portion 131, the distance between the mounting plate 10 and the web to be detected is the shortest. As a specific implementation, the second elastic member 14 is a gas spring rod, one end of which is connected to the middle area of ​​the rigid rod 13 away from the heating unit 2 through a third pin shaft 141, and the other end is connected to the first support plate 191 through a fourth pin shaft 142, and the fourth pin shaft is arranged on the side of the third pin shaft close to the heating unit. At the same time, 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 shaft is also arranged on the first support plate. ) Angle sensors and steering angle sensors can be selected; through the above-mentioned setting method, when detecting the curvature of the web, the detection wheel 115 can be brought into contact with the surface of the web under the elastic force of the second elastic member 14, so as to automatically adapt to webs of different plate thicknesses, which is more convenient and simple to use. During detection, the rigid rod can also be deflected by a certain angle under the elastic force of the second elastic member 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), and the deflection displacement of the mounting plate can be obtained in combination with the distance between the first pin and the second pin connected at both ends of a rigid rod. At this time, the curvature of the web can be obtained in combination with the displacement of the detection rod.

[0046] Further, as a preferred embodiment, refer to Figure 6-Figure 8 A first support plate 191 is provided at the edge of the web correction device, and the second pin shaft is rotatably provided on the first support plate. A locking assembly 17 is provided between the first support plate and at least one second pin shaft, and the locking assembly can lock the second pin shaft when the curvature detection unit 1 is working.

[0047] Specifically, it is understandable that when the curvature of the web is detected, if the rigid rod is deflected at will, the rigid rod 13 will be caused to rotate. At this time, although the curvature of the web can be obtained by obtaining 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. In addition, when the rigid rod rotates, the mounting plate will also be displaced in the transmission direction of the web, which will cause detection errors and reduce detection accuracy. To address this problem, the present application sets a locking assembly 17 to lock the second pin shaft 18 when the curvature detection unit is working, so that the second pin shaft cannot rotate at will. A connecting sleeve 130 adapted to the second pin shaft is provided at the end of the rigid rod, and the connecting sleeve and the second pin shaft are non-rotatingly matched through a transmission key. Through this setting, it can be ensured that the second pin shaft 18 does not rotate during detection, thereby ensuring detection accuracy.

[0048] Specifically, refer to Figure 6-Figure 9The specific structure of the locking assembly 17 is as follows: it includes an outer shell 170 that is detachably fixedly arranged on the lower surface of the first support plate 191 and coaxial with the second pin 18, a spacing sleeve 172 that is inserted and arranged at the upper end of the outer shell, at least two transmission components 173 that are evenly spaced around the second pin and a locking bevel gear 174 that is arranged at the bottom of the outer shell, and a gear ring 171 is coaxially arranged at the end of the second pin 18 that extends into the spacing sleeve, and the transmission component 173 includes a gear shaft 1730 that is rotatably arranged on the spacing sleeve, a columnar shell 1732 that rotatably cooperates with the gear shaft, and a second gear shaft 1730 that is coaxially arranged at the lower end of the columnar shell. Gear 1734, the second gear is meshed and connected with the locking bevel gear 174, the upper end of the gear shaft 1730 is provided with a first gear 1731 meshed with the ring gear 171, the gear shaft is located in the columnar shell 1732 and is provided with a blade wheel 1733, the columnar shell 1732 is filled with electromagnetic fluid, and at least one connecting flow channel 1736 is provided on the side wall of the columnar shell 1732, and the two ends of the connecting flow channel 1736 are connected with the two ends of the columnar shell 1732, and the locking bevel gear 174 and the outer shell 170 are frictionally matched through the first friction plate 175, so that the locking bevel gear 174 does not rotate.

[0049] At least one electromagnet 178 is arranged on the side wall of the outer shell 170, and the electromagnet 178 is connected to the first piezoelectric element 116 for power supply, and the electromagnet 178 is connected to the displacement detection sensor. Through this arrangement, when the conveying device starts to convey the web, the curvature detection unit starts to detect, and at this time the displacement detection sensor can detect that the displacement has changed, and at this time the electromagnet 178 starts to be powered, and the electromagnet 178 is also connected to the mains for power supply, and can also be powered by the electric energy generated by the first piezoelectric element 116, thereby making full use of the electric energy generated by the first piezoelectric element; after the electromagnet is energized, it can generate magnetism, so that the cylindrical shell 1732 is in the magnetic field range, and at this time the electromagnetic fluid in the cylindrical shell 1732 is in the magnetic field range, and the fluidity becomes poor, When the cylindrical shell 1732 rotates relative to each other, the impeller 1733 is required to drive the internal electromagnetic fluid to flow from the connecting flow channel 1736, and flow from one end of the cylindrical shell 1732 to the other end to form a circulation. At this time, the electromagnetic fluid has poor fluidity, and the resistance to relative rotation between the cylindrical shell and the gear shaft 1730 is very large, so that the gear shaft and the cylindrical shell instinctively rotate relative to each other. At this time, the transmission is transmitted through the transmission component 173 and the locking bevel gear 174, so as to achieve the purpose of locking the second pin shaft. When the curvature detection unit 1 is not detecting, the electromagnet 178 is not energized, and no magnetic field is generated. The electromagnetic fluid has good fluidity, and the gear shaft 1730 and the cylindrical shell 1732 can rotate relative to each other smoothly, thereby releasing the second pin shaft 18.

[0050] Furthermore, by connecting the electromagnet 178 and the displacement detection sensor 112, when the web is bent to a greater extent exceeding the detection range, the electromagnet can be controlled to cut off power in time, so that the locking assembly 17 releases the second pin shaft in time, allowing the rigid rod to deflect and avoid damage to the displacement detection assembly 11.

[0051] Further, it is understandable that, due to the hysteresis of the electromagnet, the locking assembly cannot release the second pin in time after the electromagnet is powered off. At this time, if the transmission speed of the web is too fast, the displacement detection assembly 11 may be damaged. In order to further improve safety, reference Figure 5 A first plate 110 is arranged in the middle area of ​​the measuring rod 1122, and a side of the first plate 110 close to the mounting plate 10 is provided with an annular partition plate 1141 integrally arranged on the inner side of the protective shell, an annular plate 119 is arranged between the annular partition plate and the first plate, and the annular plate is provided with a guide rod 1191 which cooperates with the guide of the annular partition plate, a second compression spring 118 is arranged between the annular plate 119 and the limiting plate 1112, and the elastic coefficient of the second compression spring is smaller than the elastic coefficient of the first elastic member 113, a permanent magnet 1192 which cooperates with the magnetic attraction of the annular plate 119 is arranged on the annular partition plate, a second piezoelectric member 117 is arranged on the side of the annular partition plate 1141 close to the mounting plate 10, and an impact member 1193 is arranged at the end of the guide rod 1191; through the above-mentioned arrangement, the displacement detection component 11 is in an initial state when not working as shown in FIG. Figure 5 As shown, at this time, under the elastic force of the first elastic member, the first plate 110 pushes the annular plate 119 to abut against the annular partition plate 1141. At this time, the second compression spring is in a compressed state. When the displacement detection component performs detection work, the detection rod undergoes displacement changes, driving the measuring pull rod 1122 to move. At this time, the web bending and squeezing the detection rod and thus squeezing the first elastic member are used as an example to illustrate that 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 be compressed. 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 between the permanent magnet and the annular plate. When the curvature of the web is too large and exceeds the detection range, the compression of the second compression spring also increases. The elastic force of the second compression spring is greater than the magnetic attraction of the permanent magnet on the annular plate, and the annular plate 119 is separated from the annular partition plate 1141. The elastic force of the second compression spring pushes the annular plate to move rapidly, driving the guide rod 1191 to move rapidly, causing the impact member 1193 to impact the second piezoelectric member 117 to generate electrical energy.

[0052] Continue to refer Figure 7 , Fig. 9A bottom shell 177 is provided at the bottom of the outer shell 170, and a locking bevel gear 174 is rotatably provided at the bottom of the outer shell 170 through a second rotating shaft, and the second rotating shaft cooperates with the bottom of the outer shell to prevent axial movement. The first friction plate 175 is provided at the lower end of the second rotating shaft, and a plurality of guide rods 1771 are provided at the bottom of the bottom shell 177 around the second pin shaft 18, and the plurality of guide rods are guided and cooperated with the friction plate bottom plate 1761, and a second friction plate 176 adapted to the first friction plate is provided on the friction plate bottom plate 1761, and each guide rod is sleeved with a third elastic member 1762, and the third elastic member is located between the bottom of the bottom shell and the friction plate bottom plate 1761, and an annular piezoelectric stack 1763 is also sleeved on each guide rod above the friction plate bottom plate 1761, and the end of the guide rod is threadedly connected to a limiting nut 1772, and the piezoelectric is squeezed by the limiting nut 1772 The stack applies pressure to the friction plate bottom plate 1761 and compresses the third elastic member 1762. At this time, the second friction plate is brought into contact with the first friction plate under the elastic force of the third elastic member, thereby circumferentially limiting the locking bevel gear 174. The piezoelectric stack 1763 is electrically connected to the second piezoelectric member 117. Through this arrangement, when the web bending exceeds the stroke, the second piezoelectric member 117 can be impacted to produce compression deformation and generate instantaneous electric energy. At this time, instantaneous electric energy can be applied to the piezoelectric stack at the first time to cause the piezoelectric stack to stretch and deform, thereby pushing the second friction plate to move a certain distance away from the first friction plate, separating the first friction plate and the second friction plate or reducing the friction between the two, 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 to reduce the probability of damage.

[0053] Further, as a preferred embodiment, refer to Figure 2 The curvature detection unit 1 includes two groups symmetrically arranged on both sides of the web to be detected. The two groups of curvature detection units are combined to cope with the curvature detection of the web in different directions, thereby achieving a better detection effect.

[0054] Further, as a specific implementation method, refer to Figure 1 , Fig.10 , the heating unit 2 comprises: A second bracket 21 is arranged at the edge of the web correction device; The telescopic arm 22 is horizontally arranged on the second bracket 21; The vertical plate 23 is arranged at the end of the telescopic arm 22, and an eddy current heating element 24 is arranged on a side of the vertical plate away from the telescopic arm.

[0055] Specifically, the telescopic arm can be any one of an electric telescopic arm and an elastic telescopic arm, and the telescopic direction is perpendicular to the conveying direction of the web. The elastic telescopic arm is preferred, which can automatically telescope according to the reaction force of the web and automatically adapt to the bending position. Of course, an electric telescopic arm made of an electric telescopic rod can also be used. When using the electric telescopic rod, it is connected to the curvature detection unit, so as to automatically adjust the length according to the curvature of the web to adapt to the bending of the web.

[0056] Further, as a specific implementation method, refer to Fig.10 The vertical plate 23 is provided with support rollers 25 on both sides of the upper and lower sides of the eddy current heating element 24, and the axes of the two support rollers are arranged vertically and coaxially; the distance from the contact point between the support roller and the web to the vertical plate is greater than the thickness of the eddy current heating element. When the telescopic arm is set as an elastic telescopic arm, two support rollers 25 are arranged on the vertical plate 23, so that the support rollers can contact the surface of the web, so that the eddy current heating element 24 and the web surface are separated by a suitable distance, avoiding sliding friction and improving the service life. Since the eddy current heating element uses eddy current for heating, it can still effectively heat when it is separated from the web by a suitable distance.

[0057] Furthermore, as a preferred embodiment, the eddy current heater 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. In this arrangement, the curvature detection unit 1 can detect the curvature amplitude and the curvature span of the web, so that the eddy current heater can control the heating power and the heating time according to the detection value of the curvature detection unit. The longer the span of the curvature portion of the web is, the longer the heating time is.

[0058] Further, as a specific implementation method, refer to Figure 11-13 , the correction unit 3 comprises: Support plates 31, including two parallel and spaced apart disposed on both sides of the web correcting device; The correction roller group 32 includes two groups disposed on two support plates, each group of correction roller groups includes two vertically disposed correction rollers 320, both ends of each correction roller 320 are connected to a power telescopic rod 321, and the other end of the power telescopic rod 321 is slidably matched with the support plate 31; The driving assembly 33 is horizontally arranged between the correction roller set and the support plate, and is used for driving the correction roller set 32 ​​to slide in the horizontal direction.

[0059] As a specific implementation method, refer to Figure 1 , Figure 11-13The correction unit includes two support plates 31 arranged at intervals and two connecting plates 310 connecting the upper and lower ends of the support plates. The support plates and the connecting plates form a rectangular frame-shaped structure with good stability and high structural strength. Two strip holes 311 are arranged at intervals on each support plate 31. The driving assembly 33 includes two screw rods 333 arranged corresponding to the two strip holes. Each screw rod is connected to a servo motor 334. A power telescopic rod of each correction roller group is connected to a screw nut 331, and the other power telescopic rod is connected to a sliding sleeve 332. The screw nut is threadedly connected to one screw rod, and the sliding sleeve is slidingly matched with the other screw rod guide. The screw nuts of the two groups of correction roller groups arranged on each support plate 31 are staggered in two On the screw rod, through this setting method, the positions of the two groups of correction rollers on each support plate can be adjusted separately, and the correction amplitude can be adjusted by extending and shortening the power telescopic rod 321, wherein the power telescopic rod is preferably a hydraulic telescopic rod. During the specific correction, two correction rollers on a support plate 31 can be set at intervals, and a correction roller on another support plate 31 is located between the two correction rollers. The power telescopic rod of the other correction roller group shrinks and does not participate in the correction work. At this time, when the web passes through the three correction rollers, the two correction rollers set at intervals support the web, and the correction roller set between the two correction rollers set at intervals squeezes the protruding position of the web, thereby achieving the correction effect. The direction of the two interval correction rollers can be selected according to the bending direction of the web, and the interval between the two interval correction rollers can be adjusted according to the thickness of the web, and the extension length of the power telescopic rod can be adjusted.

[0060] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A steel straightening machine, comprising a web straightening device, wherein the web straightening device comprises a plurality of web straightening arms arranged at intervals, characterized in that: Also includes: A curvature detection unit (1) is arranged between two adjacent groups of web correction arms and is used to detect the curvature of the web; A heating unit (2) is arranged downstream of the curvature detection unit (1) and is used to heat a region where the web curvature exceeds a predetermined value; The correction unit (3) corrects the heated area of ​​the web.

2. The steel straightening machine according to claim 1, characterized in that: The curvature detection unit (1) comprises a vertically arranged mounting plate (10) and a displacement detection assembly (11) arranged on the mounting plate (10); the mounting plate (10) is configured to be able to move in a direction approaching and moving away from a web.

3. The steel straightening machine according to claim 2, characterized in that: The displacement detection assembly (11) comprises a detection rod (111) and a displacement detection sensor (112) which are arranged on the mounting plate (10) in a guided manner; the detection rod (111) is provided with a detection end (1110) and a limit plate (1112) located on both sides of the mounting plate (10); and a first elastic member (113) is provided between the limit plate (1112) and the mounting plate (10).

4. The steel straightening machine according to claim 2, characterized in that: Two first pins (12) are vertically spaced apart on the mounting plate (10), each of the first pins being hingedly connected to a rigid rod (13), the other ends of the two rigid rods (13) being hingedly connected to the web correction device via a second pin, and a first connecting line connecting the axes of the two first pins and a second connecting line connecting the axes of the two second pins being parallel and equal.

5. The steel straightening machine according to claim 4, characterized in that: Located on a side of the rigid rod (13) away from the heating unit (2), the web correction device is provided with a limiting portion (131) adapted to the rigid rod, and a second elastic member (14) is provided between at least one of the rigid rods and the web correction device, the second elastic member being capable of providing an elastic force to the rigid rod to abut against the limiting portion (131).

6. The steel straightening machine according to claim 5, characterized in that: A first support plate (191) is provided at the edge of the web correction device, the second pin shaft is rotatably provided on the first support plate, a locking assembly (17) is provided between the first support plate and a second pin shaft, and the locking assembly can lock the second pin shaft when the curvature detection unit (1) is working.

7. The steel straightening machine according to claim 1, characterized in that: The heating unit (2) comprises: A second bracket (21) is arranged at the edge of the web correcting device; A telescopic arm (22) is horizontally arranged on the second bracket (21); The vertical plate (23) is arranged at the end of the telescopic arm (22), and an eddy current heating element (24) is arranged on a side of the vertical plate away from the telescopic arm.

8. The steel straightening machine according to claim 7, characterized in that: The vertical plate (23) is provided with support rollers (25) on both upper and lower sides of the eddy current heating element (24), and the axes of the two support rollers are arranged vertically and coaxially; the distance from the contact point between the support roller and the web to the vertical plate is greater than the thickness of the eddy current heating element.

9. The steel straightening machine according to claim 7, 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.

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

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