A new type of straightening machine used in I-beam production line

Abstract

The invention provides a straightening machine used in a novel I-beam production line, including an electric motor, a lower straightening roller system, an upper straightening roller system, a pressing device, and a frame. The electric motor, the lower straightening roller system, the upper straightening roller system, and the pressing device are all installed on the frame. The upper straightening roller system is arranged between the lower straightening roller system and the pressing device. There are multiple upper straightening roller systems, and each upper straightening roller system is correspondingly provided with a lower straightening roller system. The electric motor is connected to the rotating shaft of one of the lower straightening roller systems through a coupling. Each lower straightening roller system is fixed with a gear, and a first chain is connected to the multiple gears. The straightening machine used in a novel I-beam production line described in the invention solves the problems of high cost of parts and components of existing straightening machines, cumbersome installation, and unstable movement.

Description

Technical Field

[0001] The invention belongs to the field of straightening machines, in particular to a straightening machine used in a novel I-beam production line. Background Art

[0002] Straightening machine is a device for straightening metal profiles, bars, pipes, wires, etc. Straightening machine uses straightening rollers to squeeze metal profiles to change their straightness and improve product quality. Generally, there are two rows of straightening rollers, with varying numbers.

[0003] The principle of the existing straightening machine is that the motor transmits torque to the gear seat after being decelerated by the reducer. The gear seat distributes torque to each lower straightening roller system through multiple universal shafts. The number of lower straightening roller systems requires the same number of output shafts and universal couplings. Each output shaft of the gear seat requires a set of gear pairs for transmission. The lower straightening roller system and the upper straightening roller system are installed in the frame, and the pressing device is installed on the upper part of the frame. The opening adjustment of the straightening machine is completed by the pressing device. The pressing motor drives the worm turbine and the thread pair to adjust the pressing amount of each upper straightening roller system. Gears, turbines, and worms are difficult to process, with high processing precision, cumbersome installation, and high cost. In addition, the existing straightening machine is difficult to smoothly transport the straightened steel to the next link, and the vibration of the steel leads to a decrease in the quality of the steel. Summary of the invention

[0004] In view of this, the present invention proposes a novel straightening machine used in an I-beam production line to solve the problems of high component cost, complicated installation and unstable movement of existing straightening machines.

[0005] To achieve the above object, the technical solution created by the present invention is implemented as follows:

[0006] A straightening machine used in a new type I-beam production line comprises an electric motor, a lower straightening roller system, an upper straightening roller system, a pressing device, and a frame. The electric motor, the lower straightening roller system, the upper straightening roller system, and the pressing device are all installed on the frame. The upper straightening roller system is arranged between the lower straightening roller system and the pressing device. There are multiple upper straightening roller systems, and each upper straightening roller system corresponds to a lower straightening roller system. The electric motor is connected to the rotating shaft of one of the lower straightening roller systems through a coupling. A gear is fixed on each lower straightening roller system, and a first chain is connected to the multiple gears.

[0007] It also includes a transmission device, which is arranged on the outside of an upper straightening roller system located at the end, and includes a support frame, a box, a lifting assembly, a guide roller, and a support roller. The lifting assembly is installed on the support frame, and the box is installed on the lifting assembly. There are multiple guide rollers, all of which are installed on the upper part of the box. The support rollers correspond to each other one by one and are all installed on the lower part of the box. The support rollers and the guide rollers are arranged opposite to each other, and a transmission assembly for synchronously lifting and lowering multiple guide rollers is also installed on the top of the box.

[0008] Furthermore, the lifting assembly includes a threaded column, a threaded barrel, and a support plate. The bottom of the threaded column is fixed to the ground, the threaded barrel is threadedly connected to the threaded column, the top of the threaded barrel passes through the mounting frame through a through hole reserved in the support frame, and the support plate is fixed on the top, and the support plate is fitted with the box body;

[0009] A handle is also fixed to the bottom of the threaded barrel.

[0010] Furthermore, convex-shaped sliding blocks are longitudinally fixed on both sides of the box body, and a convex-shaped sliding groove corresponding to the convex-shaped sliding block is fixed on the top of the support frame, and the convex-shaped sliding groove is slidably connected to the convex-shaped sliding block.

[0011] Furthermore, the guide roller and the support roller both include a U-shaped frame, a bidirectional screw, a roller, and a telescopic rod. The closed end of the U-shaped frame is provided with an adjustment opening. The closed end of the U-shaped frame is threadedly connected with a bidirectional screw along the length direction through a reserved threaded hole. A telescopic rod is rotatably connected between the two ends of the U-shaped frame. The telescopic rod is in the form of a large sleeve sleeved with a small sleeve. One end of the large sleeve is rotatably connected to one end of the U-shaped frame through a bearing, and the other end of the large sleeve is slidably connected to the small sleeve. The end of the small sleeve away from the large sleeve is rotatably connected to the other end of the U-shaped frame through a bearing. There are two rollers, one of which is fixedly connected to the large sleeve, and the other is fixedly connected to the small sleeve. The two sleeves are arranged at intervals. The guide roller is connected to the top of the box through a mounting rod, and the support roller is fixedly connected to the bottom of the box through a support.

[0012] Furthermore, a fixing rod is connected between the small sleeve and the other end of the U-shaped frame, and the cross-sectional diameter of the fixing rod is the same as the outer diameter length of the large sleeve.

[0013] Furthermore, an adjustment component for adjusting the height of the guide roller is installed on the box body, and the adjustment component includes a mounting cylinder, which is fixed on the box body. There are multiple mounting cylinders, each of which corresponds to a guide roller. The mounting rod extends into the interior of the mounting cylinder and is slidingly connected to the mounting cylinder. The top of the mounting rod is rotatably connected to a connecting rod, which is provided with a thread. The inner side of the upper part of the mounting cylinder is provided with a thread, and the connecting rod is threadedly connected to the mounting cylinder.

[0014] Furthermore, a guide bar is fixed to the upper end of the installation rod along the length direction, and a guide groove corresponding to the guide bar is opened on the inner side of the installation tube, and the guide bar is slidably connected to the guide groove.

[0015] Furthermore, the transmission assembly includes a driving sprocket and a driven sprocket. The driving sprocket is fixed on one of the connecting rods. The top of the connecting rod to which the driving sprocket is fixed is also fixed with a cross knob. The other connecting rods are all fixed with driven sprockets. The driving sprocket and multiple driven sprockets are connected to a second chain.

[0016] Furthermore, the mounting tube at the end is also provided with a tensioning assembly for tensioning the second chain, the tensioning assembly comprising a first tensioning plate, a second tensioning plate, and screws. A strip-shaped opening corresponding to the mounting tube is opened on the top of the box body, a slider is fixed to the outside of the mounting tube, an upper limit plate is fixed to the top of the slider, and a lower limit plate is fixed to the bottom. The slider is slidably connected to the box body through the upper limit plate and the lower limit plate. The first tensioning plate is fixed to the box body, and the second tensioning plate is fixed to the upper limit plate. The screws pass through the first tensioning plate and the second tensioning plate through the openings reserved in the first tensioning plate and the second tensioning plate, and bolts are fixed at the ends.

[0017] Furthermore, there are two first tensioning plates and two second tensioning plates, the two first tensioning plates are relatively fixed at the two ends of the strip-shaped opening, the two second tensioning plates are arranged in parallel on the upper limit plate, and the screws penetrate the two first tensioning plates and the two second tensioning plates.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] (1) The invention adopts a chain connection to transmit torque to multiple upper straightening rollers, which can save costs, reduce mechanical parts processing, shorten production and manufacturing period in I-beam production lines, and has strong economy and practicality.

[0020] (2) The transmission device adapts the position and model of the steel section through the lifting assembly, the installation cylinder, the guide roller, and the support roller, so that the straightened I-shaped steel can be smoothly transmitted to prevent the I-shaped steel from being damaged.

[0021] (3) The tensioning assembly can tension the second chain by tightening the screw, which is convenient for installation and maintenance.

[0022] (4) The lifting assembly adjusts the height of the box.

[0023] (5) The convex-shaped slider is slidably connected to the convex-shaped slide rail to guide the lifting of the box, so that the box will not rotate.

[0024] (6) Rotate the cross knob to rotate the connecting rod. The lifting and lowering of the connecting rod drives the lifting and lowering of the mounting rod. Since the mounting rod and the connecting rod are connected in rotation, the mounting rod will not rotate under the guidance of the guide bar, and the guide roller will not rotate either.

[0025] (7) Rotate the bidirectional screw, and both ends of the U-shaped frame move outward or inward at the same time. The distance between the two rollers increases or decreases under the drive of the telescopic rod, thereby adapting the width of the steel section. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0027] Figure 1 A schematic top view of a straightening machine used in a novel I-beam production line according to an embodiment of the present invention;

[0028] Figure 2 A schematic side view of a straightening machine used in a novel I-beam production line according to an embodiment of the present invention;

[0029] Figure 3 A schematic front view of a straightening machine used in a novel I-beam production line according to an embodiment of the present invention;

[0030] Figure 4 A schematic diagram of a transmission device according to an embodiment of the present invention;

[0031] Figure 5 A schematic diagram of a transmission assembly and a tensioning assembly according to an embodiment of the present invention;

[0032] Figure 6 A schematic diagram of the guide roller according to an embodiment of the present invention;

[0033] Figure 7 A schematic diagram of the adjustment component described in the embodiment of the present invention;

[0034] Figure 8 A schematic diagram of the guide roller according to an embodiment of the present invention;

[0035] Fig. 9 A schematic cross-sectional view of a guide roller according to an embodiment of the present invention;

[0036] Fig.10 A schematic diagram of a tensioning assembly according to an embodiment of the present invention;

[0037] Fig.11 A schematic diagram of a lifting assembly according to an embodiment of the present invention.

[0038] Description of reference numerals:

[0039] 1-box; 11-strip opening; 2-support frame; 3-lifting assembly; 31-threaded column; 32-threaded cylinder; 33-handle; 34-support plate; 35-convex slide groove; bearing (49)-convex slide block; 4-guide roller; 41-U-shaped frame; 42-screw rod; 43-adjusting opening; 44-telescopic rod; 45-large sleeve; 46-small sleeve; 47-fixing rod; 48-roller; 49-bearing (49); 5-support roller; 51-pillar; 6-adjusting assembly; 61-connecting rod; 62-mounting cylinder; 63-cross knob; 64-threaded part; 65-baffle; 66-guide bar; 67-guide groove; 68-mounting rod; 7-tensioning assembly; 71-first tensioning plate; 72-second tensioning plate; 73-screw; 74-upper limit plate; 75-slider; 76-lower limit plate; 8-transmission assembly; 81-driving gear; 82-driven gear; 83-second chain; 9-frame; 91-electric reduction motor; 92-lower straightening roller system; 93-upper straightening roller system; 94-first chain; 95-pressing device; 96-gear. DETAILED DESCRIPTION

[0040] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0042] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0043] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0044] like Figures 1 to 4 As shown, a straightening machine used in a novel I-beam production line includes an electric motor 91, a lower straightening roller system 92, an upper straightening roller system 93, a pressing device 95, and a frame 9. The electric motor 91, the lower straightening roller system 92, the upper straightening roller system 93, and the pressing device 95 are all installed on the frame 9. The upper straightening roller system 93 is arranged between the lower straightening roller system 92 and the pressing device 95. There are multiple upper straightening roller systems 93, and each upper straightening roller system 93 is correspondingly provided with a lower straightening roller system 92. The electric motor 91 is connected to the rotating shaft of one of the lower straightening roller systems 92 through a coupling, and each lower straightening roller system 92 is fixed with a gear 96. The multiple gears 96 are connected to a first chain 94. The motor transmits torque to the lower straightening roller system 92 after being decelerated by a reducer. The lower straightening roller system 92 and the upper straightening roller system 93 of the straightening roller system 92 are installed in the frame 9, and the pressing device 95 is installed on the upper part of the frame 9. The opening degree adjustment of the straightening machine is completed by the pressing device 95. The pressing motor drives the worm turbine and the thread pair to adjust the pressing amount of each upper straightening roller system 93. The pressing device is the existing technology in this field. The electric reduction motor 91 is connected to one of the lower straightening roller systems 92 through a coupling to transmit torque, and the other lower straightening roller systems 92 are connected to transmit torque through double-row sprockets and single-row chains; the opening degree adjustment is manually adjusted by bolts and nuts between the upper straightening roller system 93 and the frame 9; in the I-beam production line, it can save costs, reduce mechanical parts processing, shorten the production and manufacturing period, and has strong economy and practicality.

[0045] It also includes a transmission device, which is arranged outside an upper straightening roller system 93 located at the end, including a support frame 2, a box body 1, a lifting assembly 3, a guide roller 4, and a support roller 5. The lifting assembly 3 is installed on the support frame 2, the box body 1 is installed on the lifting assembly 3, there are multiple guide rollers 4, all installed on the upper part of the box body 1, and the support rollers 5 correspond to each other one by one and are installed on the lower part of the box body 1. The support rollers 5 and the guide rollers 4 are arranged opposite to each other, and a transmission assembly 8 for synchronously lifting and lowering multiple guide rollers 4 is also installed on the top of the box body 1. The transmission device can smoothly transmit the straightened I-shaped steel to prevent the I-shaped steel from being damaged.

[0046] like Figure 4 , Fig.11 As shown, the lifting assembly 3 includes a threaded column 31, a threaded barrel 32, and a support plate 34. The bottom of the threaded column 31 is fixed to the ground, the threaded barrel 32 is threadedly connected to the threaded column 31, and the top of the threaded barrel 32 passes through the mounting frame through the through hole reserved by the support frame 2. The support plate 34 is fixed on the top, and the support plate 34 is arranged in close contact with the box body 1;

[0047] A handle 33 is also fixed to the bottom of the threaded barrel 32 .

[0048] like Figure 4 As shown, convex-shaped slider 75 bearings (49) are longitudinally fixed on both sides of the box body 1, and a convex-shaped slide groove 35 corresponding to the convex-shaped slider 75 bearings (49) is fixed on the top of the support frame 2, and the convex-shaped slide groove 35 is slidably connected with the convex-shaped slider 75.

[0049] like Figure 8 , Fig. 9 As shown, the guide roller 4 and the support roller 5 both include a U-shaped frame 41, a bidirectional screw 42, a roller 48, and a telescopic rod 44. The closed end of the U-shaped frame 41 is provided with an adjustment opening 43. The closed end of the U-shaped frame 41 is threadedly connected with the bidirectional screw 42 along the length direction through a reserved threaded hole. The middle position of the bidirectional screw 42 is rotatably connected to the U-shaped frame 41. The telescopic rod 44 is rotatably connected between the two ends of the U-shaped frame 41. The telescopic rod 44 is in the form of a large sleeve 45 with a small sleeve 46, and one end of the large sleeve 45 is It is rotatably connected to one end of the U-shaped frame 41 through a bearing 49, the other end of the large sleeve 45 is slidably connected to the small sleeve 46, and the end of the small sleeve 46 away from the large sleeve 45 is rotatably connected to the other end of the U-shaped frame 41 through a bearing 49. There are two rollers 48, one of which is fixedly connected to the large sleeve 45, and the other is fixedly connected to the small sleeve 46. The two sleeves are arranged at intervals. The guide roller 4 is connected to the top of the box body 1 through the mounting rod 68, and the support roller 5 is fixedly connected to the bottom of the box body 1 through the support pillar 51.

[0050] like Figure 8 , Fig. 9 As shown, a fixing rod 47 is connected between the small sleeve 46 and the other end of the U-shaped frame 41 , and the cross-sectional diameter of the fixing rod 47 is the same as the outer diameter length of the large sleeve 45 .

[0051] like Figure 5 , Figure 6 , Figure 7 As shown, the box body 1 is also equipped with an adjustment component 6 for adjusting the height of the guide roller 4. The adjustment component 6 includes a mounting cylinder 62, which is fixed on the box body 1. There are multiple mounting cylinders 62, each mounting cylinder 62 corresponds to a guide roller 4. The mounting rod 68 extends into the mounting cylinder 62 and is slidably connected to the mounting cylinder 62. The top of the mounting rod 68 is rotatably connected to a connecting rod 61, which is provided with a thread. The inner side of the upper part of the mounting cylinder 62 is provided with a thread, and the connecting rod 61 is threadedly connected to the mounting cylinder 62.

[0052] like Figure 5 , Figure 6 , Figure 7 As shown, a guide bar 66 is fixed to the upper end of the installation rod 68 along the length direction, and a guide groove 67 corresponding to the guide bar 66 is opened on the inner side of the installation cylinder 62, and the guide bar 66 is slidably connected to the guide groove 67.

[0053] like Figure 5As shown, the transmission assembly 8 includes a driving sprocket and a driven sprocket. The driving sprocket is fixed on one of the connecting rods 61. The top of the connecting rod 61 to which the driving sprocket is fixed is also fixed with a cross knob 63. The other connecting rods 61 are all fixed with driven sprockets. The driving sprocket and multiple driven sprockets are connected with a second chain 83.

[0054] like Figure 4 , Figure 5 , Fig.10 As shown, the mounting tube 62 at the end is also provided with a tensioning assembly 7 for tensioning the second chain 83. The tensioning assembly 7 includes a first tensioning plate 71, a second tensioning plate 72, and a screw 73. A strip opening corresponding to the mounting tube 62 is opened on the top of the box body 1. A slider 75 is fixed to the outside of the mounting tube 62. An upper limit plate 74 is fixed to the top of the slider 75, and a lower limit plate 76 is fixed to the bottom. The slider 75 is slidably connected to the box body 1 through the upper limit plate 74 and the lower limit plate 76. The first tensioning plate 71 is fixed to the box body 1, and the second tensioning plate 72 is fixed to the upper limit plate 74. The screw 73 passes through the first tensioning plate 71 and the second tensioning plate 72 through the openings reserved by the first tensioning plate 71 and the second tensioning plate 72, and is fixed with bolts at the ends.

[0055] like Figure 5 , Fig.10 As shown, there are two first tensioning plates 71 and two second tensioning plates 72. The two first tensioning plates 71 are relatively fixed at the two ends of the strip-shaped opening, and the two second tensioning plates 72 are arranged in parallel on the upper limit plate 74. The screws 73 penetrate the two first tensioning plates 71 and the two second tensioning plates 72. Tightening the screws 73 can tighten the second chain 83, which is convenient for installation and maintenance.

[0056] Before the straightening machine works, the height of the box body 1 is adjusted by the lifting assembly 3, and the handle 33 is turned to select the height of the threaded tube 32, thereby raising the box body 1. Since the bearing (49) of the convex sliding block 75 is slidably connected with the convex sliding rail, the lifting of the box body 1 is guided, so that the box body 1 will not rotate. When the box body 1 is adjusted to the height corresponding to the I-shaped steel, the cross knob 63 is rotated to rotate the connecting rod 61. The lifting of the connecting rod 61 drives the installation rod 68 to rise and fall. Since the installation rod 68 is rotatably connected to the connecting rod 61, the installation rod 68 will not rotate under the guidance of the guide bar 66, and the guide roller 4 will not rotate either. After the height of the guide roller 4 is adjusted to a suitable position, the width of the guide roller 4 is adaptively adjusted according to the width of the steel. The bidirectional screw 42 is rotated, and the two ends of the U-shaped frame 41 move outward or inward at the same time. The distance between the two rollers 48 increases or decreases under the drive of the telescopic rod 44, thereby adapting to the width of the steel.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A new type of straightening machine used in an I-beam production line, characterized in that: The invention comprises an electric reducer motor (91), a lower straightening roller system (92), an upper straightening roller system (93), a pressing device (95), and a frame (9). The electric reducer motor (91), the lower straightening roller system (92), the upper straightening roller system (93), and the pressing device (95) are all installed on the frame (9). The upper straightening roller system (93) is arranged between the lower straightening roller system (92) and the pressing device (95). There are multiple upper straightening roller systems (93), and each upper straightening roller system (93) is correspondingly provided with a lower straightening roller system (92). The electric reducer motor (91) is connected to the rotating shaft of one of the lower straightening roller systems (92) through a coupling. Each lower straightening roller system (92) is fixed with a gear (96). The multiple gears (96) is connected to a first chain (94); it also includes a transmission device, which is arranged on the outside of an upper straightening roller system (93) located at the end, and includes a support frame (2), a box (1), a lifting component (3), a guide roller (4), and a support roller (5). The lifting component (3) is installed on the support frame (2), the box (1) is installed on the lifting component (3), there are multiple guide rollers (4), all of which are installed on the upper part of the box (1), and the support rollers (5) correspond to each other one by one and are installed on the lower part of the box (1). The support rollers (5) and the guide rollers (4) are arranged opposite to each other. A transmission component (8) for synchronously lifting and lowering multiple guide rollers (4) is also installed on the top of the box (1); The guide roller (4) and the support roller (5) both comprise a U-shaped frame (41), a bidirectional screw (42), a roller (48), and a telescopic rod (44). The closed end of the U-shaped frame (41) is provided with an adjustment opening (43). The closed end of the U-shaped frame (41) is threadedly connected with the bidirectional screw (42) along the length direction through a reserved threaded hole. The telescopic rod (44) is rotatably connected between the two ends of the U-shaped frame (41). The telescopic rod (44) is in the form of a large sleeve (45) sleeved with a small sleeve (46). One end of the large sleeve (45) is connected to the U-shaped frame (41) through a bearing (49). One end of the large sleeve (45) is rotatably connected to the small sleeve (46), the other end of the large sleeve (45) is slidably connected to the small sleeve (46), one end of the small sleeve (46) away from the large sleeve (45) is rotatably connected to the other end of the U-shaped frame (41) through a bearing (49), there are two rollers (48), one of which is fixedly connected to the large sleeve (45), and the other is fixedly connected to the small sleeve (46), and the two sleeves are arranged at intervals, the guide roller (4) is connected to the top of the box body (1) through a mounting rod (68), and the support roller (5) is fixedly connected to the bottom of the box body (1) through a support column (51); The box body (1) is also provided with an adjustment assembly (6) for adjusting the height of the guide roller (4). The adjustment assembly (6) includes a mounting tube (62). The mounting tube (62) is fixed on the box body (1). There are a plurality of mounting tubes (62), each mounting tube (62) corresponds to a guide roller (4). A mounting rod (68) extends into the interior of the mounting tube (62) and is slidably connected to the mounting tube (62). A connecting rod (61) is rotatably connected to the top of the mounting rod (68). The connecting rod (61) is provided with a thread. The inner side of the upper part of the mounting tube (62) is provided with a thread. The connecting rod (61) is threadedly connected to the mounting tube (62). The lifting assembly (3) comprises a threaded column (31), a threaded barrel (32), and a support plate (34). The bottom of the threaded column (31) is fixed to the ground, the threaded barrel (32) is threadedly connected to the threaded column (31), the top of the threaded barrel (32) passes through the mounting frame through a through hole reserved in the support frame (2), and the support plate (34) is fixed on the top, and the support plate (34) is arranged in close contact with the box body (1); A handle (33) is also fixed to the bottom of the threaded cylinder (32).

2. The straightening machine used in the new I-beam production line according to claim 1 is characterized in that: Convex-shaped sliders are longitudinally fixed on both sides of the box body (1), and a convex-shaped slide groove (35) corresponding to the convex-shaped slider is fixed on the top of the support frame (2), and the convex-shaped slide groove (35) is slidably connected to the convex-shaped slider (75); The convex-shaped sliding block is a bearing (49).

3. The straightening machine used in the new I-beam production line according to claim 1 is characterized in that: A fixing rod (47) is also connected between the small sleeve (46) and the other end of the U-shaped frame (41), and the cross-sectional diameter of the fixing rod (47) is the same as the outer diameter length of the large sleeve (45).

4. The straightening machine used in the new I-beam production line according to claim 1 is characterized in that: A guide bar (66) is fixed to the upper end of the mounting rod (68) along the length direction, and a guide groove (67) corresponding to the guide bar (66) is formed inside the mounting cylinder (62), and the guide bar (66) is slidably connected to the guide groove (67).

5. The straightening machine used in the new I-beam production line according to claim 1 is characterized in that: The transmission assembly (8) comprises a driving sprocket and a driven sprocket, wherein the driving sprocket is fixed on one of the connecting rods (61), a cross knob (63) is also fixed on the top of the connecting rod (61) on which the driving sprocket is fixed, and driven sprockets are fixed on the other connecting rods (61), and a second chain (83) is connected to the driving sprocket and the plurality of driven sprockets.

6. The straightening machine used in the new I-beam production line according to claim 5 is characterized by: The mounting tube (62) at the end is also provided with a tensioning assembly (7) for tensioning the second chain (83). The tensioning assembly (7) comprises a first tensioning plate (71), a second tensioning plate (72), and a screw (73). A strip-shaped opening corresponding to the mounting tube (62) is opened at the top of the box body (1). A slider (75) is fixed to the outside of the mounting tube (62). An upper limit plate (74) is fixed to the top of the slider (75), and a lower limit plate (76) is fixed to the bottom. The slider (75) is slidably connected to the box body (1) through the upper limit plate (74) and the lower limit plate (76). The first tensioning plate (71) is fixed to the box body (1), and the second tensioning plate (72) is fixed to the upper limit plate (74). The screw (73) passes through the first tensioning plate (71) and the second tensioning plate (72) through the openings reserved by the first tensioning plate (71) and the second tensioning plate (72), and is fixed with bolts at the ends.

7. The straightening machine used in the new I-beam production line according to claim 6 is characterized by: There are two first tensioning plates (71) and two second tensioning plates (72), the two first tensioning plates (71) are relatively fixed at the two ends of the strip-shaped opening, the two second tensioning plates (72) are arranged in parallel on the upper limit plate (74), and the screws (73) penetrate the two first tensioning plates (71) and the two second tensioning plates (72).

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