CN113059026A

CN113059026A - Floating straightening device

Info

Publication number: CN113059026A
Application number: CN202110349877.1A
Authority: CN
Inventors: 魏国春; 于谢天; 冀谦; 吝建全; 罗大林; 刘金龙
Original assignee: Zhengzhou Baoye Steel Structure Co ltd; Beris Engineering and Research Corp
Current assignee: Zhengzhou Baoye Steel Structure Co ltd; Beris Engineering and Research Corp
Priority date: 2021-03-31
Filing date: 2021-03-31
Publication date: 2021-07-02
Anticipated expiration: 2041-03-31
Also published as: CN113059026B

Abstract

The invention relates to a floating straightening device, which comprises: the driving roll shaft mechanism comprises a main shaft and a main roller wheel which is sleeved and limited on the main shaft, and the main roller wheel is arranged to rotate around the axis of the main shaft under the driving of the driving mechanism; the two supporting mechanisms are symmetrically fixed at two ends of the main shaft and are used for being fixed at two sides of the discharge end of the production line equipment rack; and the two auxiliary roller mechanisms are symmetrically arranged and are sleeved on the main shaft in a sliding manner, the two auxiliary roller mechanisms are positioned on two sides of the main roller wheel and are respectively positioned between the main roller wheel and the supporting mechanism, and the auxiliary roller mechanisms comprise auxiliary roller wheels which face the main roller wheel and are parallel to the main shaft in axis. The floating straightening device can ensure that the straightening effect of the section steel with different specifications can meet the standard and standard requirements of the section steel, simultaneously reduces the interference to the production rhythm, reduces the production cost and realizes automatic operation.

Description

Floating straightening device

Technical Field

The invention belongs to the field of section steel production, and particularly relates to a floating straightening device.

Background

In the current field of section steel production, for example, in a welded section steel production line, a straightening mechanism is usually arranged to improve the shape of a section steel product and ensure that the delivery size of the section steel product can meet the national standard requirements. In the prior art, the straightening apparatuses for steel sections are usually in the form of both off-line straightening apparatuses and on-line straightening apparatuses, however, the prior art straightening apparatuses generally have the following disadvantages: the offline straightening equipment has high equipment investment, more operators and large occupied area of a factory building; the arrangement of the on-line straightening equipment is complex, and the rhythm of section steel production is easily influenced by the transformation of a production line. In addition, the straightening device can not adapt to and cover various specifications of produced welded section steel, and is also a technical problem to be solved urgently by the existing straightening device.

Therefore, those skilled in the art need to find a floating straightening device, which can ensure that the straightening effect of the section steels with different specifications can meet the standard specification requirement of the section steels, and at the same time, reduce the interference to the production rhythm, reduce the production cost, and realize the on-line straightening of the automatic operation.

Disclosure of Invention

In order to solve all or part of the problems, the invention aims to provide a floating straightening device which can ensure that the straightening effect of the section steels with different specifications can meet the standard specification requirement of the section steels, reduce the interference on the production rhythm, reduce the production cost and realize automatic operation.

The invention provides a floating straightening device, which comprises: the driving roll shaft mechanism comprises a main shaft and a main roller wheel which is sleeved and limited on the main shaft, and the main roller wheel is arranged to rotate around the axis of the main shaft under the driving of the driving mechanism; the two supporting mechanisms are symmetrically fixed at two ends of the main shaft and are used for being fixed at two sides of the discharge end of the production line equipment rack; and the two auxiliary roller mechanisms are symmetrically arranged and are sleeved on the main shaft in a sliding manner, the two auxiliary roller mechanisms are positioned on two sides of the main roller wheel and are respectively positioned between the main roller wheel and the supporting mechanism, and the auxiliary roller mechanisms comprise auxiliary roller wheels which face the main roller wheel and are parallel to the main shaft in axis. Wherein, vice roller mechanism sets up to can move along the axis of main shaft under the drive of actuating mechanism, and vice roller sets up to: the straightening mechanism can move close to and far away from the main shaft along the radial direction under the driving of the driving mechanism, and can rotate around the axis of the straightening mechanism under the action of external force, so that a straightening gap is formed between the main roller wheel and the auxiliary roller wheel.

Further, the sub roller mechanism includes: one end of the sliding block seat is sleeved with the main shaft in a sliding manner; the pressing slider is arranged in the slider seat in a sliding manner, and the shaft end of the auxiliary roller wheel is fixedly connected with the pressing slider; and the first driving device is arranged on the sliding block seat, the driving end of the first driving device is connected with the pressing sliding block, and the first driving device is used for driving the pressing sliding block to move up and down along the direction close to and far away from the main shaft.

Furthermore, a guide limiting hole with the length direction perpendicular to the axis direction of the main shaft is formed in the side wall of the sliding block seat, and the shaft end of the auxiliary roller wheel is fixedly connected with the pressing sliding block through the guide limiting hole.

Further, a position sensor is arranged at the driving end of the first driving device and used for feeding back the position of the driving end of the first driving device so as to obtain the radial distance of the auxiliary roller wheel relative to the main roller wheel through a control system.

Further, a pressure sensor is arranged at the driving end of the first driving device and used for feeding back the pressure of the driving end of the first driving device so as to obtain the pressing force of the counter roller through the control system.

Further, the supporting mechanism comprises a bearing seat and a floating support, the bearing seat is fixed on the equipment rack and provided with a bearing, one end of the floating support is rotatably connected with the bearing through a rotating shaft and can be limited through the bearing seat, and the floating supports on two sides are connected into a whole through a main shaft.

Furthermore, the floating support is constructed into a swing arm with a plate-shaped structure, the two swing arms are arranged oppositely and in parallel, one end of each swing arm is sleeved on the rotating shaft, and the other end of each swing arm can swing relative to the bearing seat under the action of external force, so that the height of the floating support can be adjusted along with the production form of the section steel.

Further, be provided with running gear on the one side relative with vice roller mechanism of swing arm, running gear includes: the second driving device is fixed on the swing arm; and one end of the guide component is connected with the second driving device, and the other end of the guide component is connected with the auxiliary roller mechanism, and the guide component can drive the auxiliary roller mechanism to move and position along a single direction under the driving of the second driving device.

Further, the guide assembly includes: the lead screw penetrates through the swing arm and is connected with the second driving device; and the nut is arranged on the sliding block seat and is in threaded connection with the lead screw, and a motor output shaft of the second driving device is used for driving the lead screw to rotate so as to drive the nut to move.

Further, an encoder is further arranged on the side of the motor output shaft of the second driving device and used for feeding back the revolution number of the motor output shaft so as to obtain the position of the counter roller in the axial direction of the main shaft through a control system.

The floating straightening device has a simple structure, is set more intelligently and quickly before straightening, and can ensure that the delivery size of a section steel product meets the national standard requirement while the production rhythm of the section steel is not influenced. Moreover, the welded wing plate after welding of the T-shaped steel, the L-shaped steel or the H-shaped steel on the welded profile steel production line can be straightened out, the production rhythm is not disturbed, the production cost can be reduced, the automatic control can be realized, and the maintenance is easy.

Drawings

FIG. 1 is a schematic view showing the structure of a floating straightener in an embodiment of the present invention.

Detailed Description

For a better understanding of the objects, structure and function of the invention, a floating straightener of the invention is described in further detail below with reference to the accompanying drawings.

FIG. 1 shows the structure of a floating straightener 100 according to an embodiment of the invention. As shown in FIG. 1, a floating straightener 100 of an embodiment of the present invention comprises: the driving roller mechanism 10 comprises a main shaft 11 and a main roller wheel 12 which is sleeved on and limited on the main shaft 11, wherein the main roller wheel 12 is arranged to rotate around the axis of the main shaft 11 under the driving of the driving mechanism; the two supporting mechanisms 20 are symmetrically fixed at two ends of the main shaft 11 and are used for being fixed at two sides of the discharge end of the production line equipment rack; and two secondary roller mechanisms 30, the two secondary roller mechanisms 30 are symmetrically arranged and slidably sleeved on the main shaft 11, the two secondary roller mechanisms 30 are located at two sides of the main roller 12 and respectively located between the main roller 12 and the supporting mechanism 20, and the secondary roller mechanisms 30 comprise secondary rollers 31 facing the main roller 12 and having axes parallel to the main shaft 11. Wherein, the auxiliary roller mechanism 30 is arranged to be capable of moving along the axis of the main shaft 11 under the driving of the driving mechanism, and the auxiliary roller 31 is arranged to: can move close to and far from the main shaft 11 along the radial direction under the driving of the driving mechanism and can rotate around the axis of the main roller 12 and the auxiliary roller 31 under the action of external force, so that a straightening gap is formed between the main roller 12 and the auxiliary roller.

The driving roller shaft mechanism 10 mentioned in the present application includes a main shaft 11 and a main roller 12 sleeved on the main shaft 11, and the main roller 12 can rotate under the driving of a driving mechanism (e.g. a driving motor). The limiting referred to in this application means that the main roller 12 only rotates and does not move along the axis direction, the rotating position is fixed, and the position can be fixed by the limiting blocking wall and the fixing piece. The rotation direction of the main roller 12 mentioned in this application is the direction in which the contact point of the main roller 12 with the section steel 200 is along the production line. The structure of the main roller 12 mentioned in this application can be a single roller, and can also be a combination of rollers and gears. Two supporting mechanisms 20 mentioned in this application are fixed behind the both ends of main shaft 11, and then fixed in the both sides of the discharge end of production line equipment frame for main shaft 11 and the synchronous motion of each supporting mechanism 20 at both ends. Reference herein to two support mechanisms 20 being symmetrical means that the two support mechanisms 20 are substantially identical in structure and are arranged in mirror image to achieve synchronization of their functions. The two sides of the discharge end of the production line equipment frame mentioned in the application refer to the product of the section steel 200 transported to the discharge end through the production line, the two supporting mechanisms 20 are fixed on the two sides of the equipment frame, and the section steel 200 can pass through the floating straightening device 100 of the embodiment of the invention and can pass through the straightening gap formed between the main roller 12 and the auxiliary roller 31, namely, the axial direction of the main shaft 11 is perpendicular to the moving direction or the length direction of the section steel 200. The symmetrical arrangement of the two secondary roller mechanisms 30 mentioned in the present application means that the two secondary roller mechanisms 30 are substantially identical in structure and are arranged in mirror image so as to achieve synchronization of their functions. The two secondary roller mechanisms 30 mentioned in the present application are slidably sleeved on the main shaft 11 and can move along the axis of the main shaft 11 under the driving of a driving mechanism (such as a driving motor and the like), which means that the secondary roller mechanisms 30 do not rotate relative to the axis of the main shaft 11 as a whole. The reference to the sub roller 31 facing the main roller 12 in this application means that the sub roller 31 is located on the side of the sub roller mechanism 30 facing the main roller 12 so that a straightening gap can be formed between the sub roller 31 and the main roller 12. The fact that the auxiliary roller 31 is parallel to the axis of the main shaft 11 means that the axes of the auxiliary roller 31, the main roller 12 and the main shaft 11 are all parallel.

When the floating straightening device 100 of the embodiment of the invention is used, the position of the auxiliary roller 31 can be adjusted according to the shape of the section steel 200 to be straightened, such as the T-shaped steel 200 (shown in FIG. 1), the L-shaped steel or the H-shaped steel. The adjustment mode comprises axial position adjustment and radial position adjustment, and the adjusted driving force can be implemented through a driving mechanism. After the adjustment is completed, a straightening gap adapted to the shape of the section steel 200 to be straightened can be formed between the main roll wheel 12 and the sub roll wheel 31. The floating straightening device 100 is started, the section steel 200 reaches the gap of the floating straightening device 100 under the conveying of the production line, and the main roller 12 is driven by the driving mechanism to rotate along the moving direction of the production line so as to substitute the section steel 200 into the straightening gap. The steel section 200 is finally straightened on line under the combined action of the auxiliary roller 31 and the main roller 12 after the position adjustment.

The floating straightening device 100 provided by the embodiment of the invention has a simple structure, is set more intelligently and quickly before straightening, and can ensure that the delivery size of the section steel 200 product meets the national standard requirement while the production rhythm of the section steel 200 is not influenced. Moreover, the welded wing plate after welding of the T-shaped steel 200, the L-shaped steel 200 or the H-shaped steel 200 on the production line of the welded profile steel 200 can be straightened out and deformed, the production rhythm is not interfered, the production cost can be reduced, the automatic control can be realized, and the maintenance is easy.

Preferably, as shown in fig. 1, the sub roller mechanism 30 may include: one end of the slider seat 32 is in sliding sleeve joint with the main shaft 11; the pressing sliding block 33 is arranged in the sliding block seat 32 in a sliding manner, and the shaft end of the auxiliary roller 31 is fixedly connected with the pressing sliding block 33; and a first driving device 34, the first driving device 34 is arranged on the slider seat 32 and the driving end is connected with the depressing slider 33, the first driving device 34 is used for driving the depressing slider 33 to move up and down along the direction close to and far away from the main shaft 11.

The slider holder 32 mentioned in the present application may be configured as a hollow cavity, and the press-down slider 33 is disposed in the cavity and can slide along the cavity. The shaft end of the secondary roller 31 and the press-down slider 33 are fixedly connected in the application, which means that the axis of the secondary roller 31 is perpendicular to the sliding direction of the press-down slider 33 and is fixedly connected with the press-down slider 33. The first drive means 34 mentioned in this application may be a hydraulic cylinder, and the press-down slider 33 may be arranged at the end of the piston rod of the hydraulic cylinder. Through the arrangement, according to different straightening thicknesses of the produced section steel 200, the hydraulic cylinder can drive the press-down sliding block 33 to move on the sliding block seat so as to change the radial distance between the auxiliary roller 31 and the main roller 12, thereby changing the thickness of the straightening gap and further meeting the requirement of the straightening thickness of the section steel 200.

Preferably, as shown in fig. 1, a guide limiting hole 35 whose length direction is perpendicular to the axial direction of the main shaft 11 may be formed on the side wall of the slider seat 32, and the shaft end of the sub roller 31 is fixedly connected with the pressing slider 33 through the guide limiting hole 35.

The spacing hole 35 of direction that mentions in this application can have length direction along the moving direction of vice running roller 31, and its width should be with the axle head phase-match of vice running roller 31 to make vice running roller 31 can only move along the length direction of the spacing hole 35 of direction, with the spacing of realization removal process. Through the arrangement, the movement of the counter roller 31 driven by the first driving device 34 can be more stable, and the size and the shape of the straightening gap can be better adjusted by limiting the moving direction of the counter roller, so that the delivery size of the section steel 200 straightened by the floating straightening device 100 of the invention is more accurate.

In a preferred embodiment, the driving end of the first driving device 34 may be provided with a position sensor (not shown in the drawings) for feeding back the position of the driving end of the first driving device 34 to derive the distance of the counter roller 31 in the radial direction with respect to the master roller 12 by the control system.

The first drive means 34 mentioned in the present application may preferably be a hydraulic cylinder. The position sensor mentioned in this application may be arranged on the piston rod of the hydraulic cylinder for feedback of the position of the piston rod. Through the setting, the computer control system can obtain the radial distance of the auxiliary roller 31 relative to the main roller 12 by combining the fed back position of the piston rod, so that the adjustment can be automatically carried out through the program of the control system, and the straightening thickness requirement of the section steel 200 can be met.

In a preferred embodiment, the driving end of the first driving device 34 may be provided with a pressure sensor (not shown in the drawings) for feeding back the pressure of the driving end of the first driving device 34 to derive the depressing force of the counter roller wheel 31 by the control system.

The first drive means 34 mentioned in the present application may preferably be a hydraulic cylinder. The driving end of the first driving device 34 referred to in this application may be the piston of a hydraulic cylinder. The pressure sensor mentioned in this application can be for setting up the sensor on the piston, also can be for the configuration pressure transmitter in hydraulic system, and pressure transmitter is used for feeding back hydraulic pressure in the pneumatic cylinder piston, and computer control system can combine the feedback to obtain the holding down force of vice running roller 31 to the rolling down quantity of automatic adjustment vice running roller 31, in order to satisfy the requirement of shaped steel 200 straightening thickness and avoid system's equipment overload damage.

Preferably, as shown in fig. 1, the support mechanism 20 may include a bearing seat 21 and a floating bracket 22, the bearing seat 21 is fixed on the equipment rack and is provided with a bearing, and one end of the floating bracket 22 is rotatably connected with the bearing through a rotating shaft and can be limited by the bearing seat 21. Wherein, the floating supports 22 at two sides are connected into a whole through the main shaft 11. Preferably, the floating support 22 may be configured as a swing arm with a plate-shaped structure, the two swing arms are arranged oppositely and in parallel, one end of the swing arm is sleeved on the rotating shaft, and the other end of the swing arm can swing relative to the bearing seat 21 under the action of external force, so that the height of the floating support 22 can be adjusted along with the production form of the section steel 200.

The opposite and parallel arrangement of the two swing arms referred to in this application is to be understood as a mirror-symmetrical arrangement of the two swing arms with respect to the main shaft 11. One end cover of the swing arm mentioned in this application is established in the pivot, and the other end can be swung for bearing frame 21 under the effect of external force, can understand that the other end of swing arm means to go up can form certain oscillating quantity. The pivot mentioned in this application can be the round pin axle. Through the arrangement, the section steel 200 with different forms can enable the swing arms to swing adaptively through acting force on the main roller 12, so that the height of the floating support 22 can be adjusted along with the production form of the section steel 200. Thus, the floating straightening device 100 according to the embodiment of the present invention can be adapted to straightening of the section steel 200 in various positions and shapes by floating adjustment, and has a wider applicability and can more automatically meet various straightening requirements.

Preferably, as shown in fig. 1, a traveling mechanism 40 may be provided on a side of the swing arm opposite to the sub roller mechanism 30, and the traveling mechanism 40 may include: a second driving device 41 fixed to the swing arm; and a guide assembly 42 having one end connected to the second driving device 41 and the other end connected to the sub roller mechanism 30, wherein the guide assembly 42 can drive the sub roller mechanism 30 to move and position in a single direction under the driving of the second driving device 41.

The second driving means 41 referred to in this application may be a driving motor. The guide assembly 42 referred to in the present application may preferably, the guide assembly 42 includes: a lead screw 421 connected to the second driving device 41 through the swing arm; and a nut 422 which is arranged on the slider seat 32 and is in threaded connection with the lead screw 421, wherein the motor output shaft of the second driving device 41 is used for driving the lead screw 421 to rotate so as to drive the nut 422 to move. The single direction mentioned in the present application means that the secondary roller mechanism 30 does not rotate along the axis of the main shaft 11, and only moves in the direction of the axis of the main shaft 11. Through the arrangement, according to different straightening widths of the produced section steel 200, the second driving device 41 can drive the slider seat 32 to move through the lead screw 421 and the nut 422, and finally, the distance between the two counter rollers 31 and the distance between the main roller 12 and the counter rollers 31 in the axial direction can meet the requirement of the straightening width of the section steel 200.

In a preferred embodiment, the motor output shaft side of the second driving device 41 may be further provided with an encoder (not shown in the figure), and the encoder may be used for feeding back the number of rotations of the motor output shaft to find out the position of the counter roller 31 in the axial direction of the main shaft 11 by the control system. Through this setting, the encoder is used for feeding back motor output shaft revolution, and computer control system can obtain the position of vice running roller 31 in the axis direction of main shaft 11 according to the revolution to control system's procedure can automatic adjustment, in order to satisfy the requirement of shaped steel 200 straightening thickness.

The operation of the floating straightener 100 of the present invention as a whole will be explained in detail as follows:

when the section steel 200 to be straightened approaches the floating straightener 100, the main roller 12 starts to rotate under the drive of its driving mechanism. According to the straightening width of the produced section steel 200, the second driving device 41 of the traveling mechanism 40 is started, and the sliding block seat 32 is driven to move through the lead screw 421 and the nut 422, so that the distance between the two counter rollers 31 and the axial distance between each counter roller 31 and the main roller 12 meet the requirement of the straightening width of the section steel. According to the straightening thickness of the produced section steel 200, the first driving device 34 of the secondary roller mechanism 30 operates to drive the pressing slider 33 to move on the slider seat 32, so that the distance on the section between the secondary roller wheel 31 and the main roller wheel 12 is changed, and the straightening thickness requirement of the section steel is met. The straightened section steel 200 comes to a straightening position (i.e. a straightening gap) and enters the floating straightening device 100 under the combined action of the main roller 12 and the auxiliary roller 31, and the height of the floating support 22 can be freely changed and adjusted along with the production form of the section steel 200 under the bearing connection of the bearing block 21 according to the form of the produced section steel 200. According to the straightening effect and the feedback of the pressure transmitter, the first driving device 34 can drive the pressing slider 33 to move on the slider seat 32, so that the distance on the section between the counter roller 31 and the main roller 12 is adjusted. After the section steel 200 is straightened, the first driving device 34 of the secondary roller mechanism 30 operates to drive the press-down slider 33 to move on the slider seat 32, and the initial position of the secondary roller 31 is restored. Finally, the second driving device 41 of the traveling mechanism 40 is started to drive the slider holder 32 to move through the lead screw 421 and the nut 422, so that the two counter rollers 31 are finally restored to the initial positions, and one cycle of the straightening work of the section steel 200 is completed.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.

In the description of the present application, it is to be understood that the terms "length," "thickness," "inner," "outer," "axial," "radial," and the like are used in the orientations and positional relationships indicated in the drawings for the purpose of convenience and simplicity of description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. A floating straightener, comprising:

the driving roll shaft mechanism comprises a main shaft and a main roller wheel sleeved and limited on the main shaft, and the main roller wheel is arranged to rotate around the axis of the main shaft under the driving of the driving mechanism;

the two supporting mechanisms are symmetrically fixed at two ends of the main shaft and are used for being fixed at two sides of a discharge end of a production line equipment rack; and

the two auxiliary roller mechanisms are symmetrically arranged and are sleeved on the main shaft in a sliding manner, the two auxiliary roller mechanisms are positioned on two sides of the main roller and are respectively positioned between the main roller and the supporting mechanism, and each auxiliary roller mechanism comprises an auxiliary roller facing the main roller and the axis of the auxiliary roller is parallel to the main shaft;

wherein the secondary roller mechanism is arranged to be capable of moving along the axis of the main shaft under the driving of the driving mechanism, and the secondary roller is arranged to: the straightening mechanism can move close to and far away from the main shaft along the radial direction under the driving of the driving mechanism, and can rotate around the axis of the straightening mechanism under the action of external force, so that a straightening gap is formed between the main roller and the secondary roller.

2. The floating straightener of claim 1 wherein the secondary roller mechanism comprises: one end of the sliding block seat is in sliding sleeve joint with the main shaft; the pressing slider is arranged in the slider seat in a sliding manner, and the shaft end of the secondary roller wheel is fixedly connected with the pressing slider; the first driving device is arranged on the sliding block seat, the driving end of the first driving device is connected with the pressing sliding block, and the first driving device is used for driving the pressing sliding block to move up and down along the direction close to and far away from the main shaft.

3. The floating straightening device as claimed in claim 2, wherein a guide limiting hole with the length direction perpendicular to the axial direction of the main shaft is formed in the side wall of the slide block seat, and the shaft end of the secondary roller wheel is fixedly connected with the pressing slide block through the guide limiting hole.

4. The floating straightener of claim 2 or 3 wherein the drive end of the first drive is provided with a position sensor for feedback of the position of the drive end of the first drive to derive the distance of the secondary roller in the radial direction relative to the primary roller wheel by a control system.

5. The floating straightening device according to claim 2 or 3, characterized in that the driving end of the first driving device is provided with a pressure sensor for feeding back the pressure of the driving end of the first driving device to derive the pressing force of the counter roller wheel through a control system.

6. The floating straightening device according to claim 2 or 3, characterized in that the supporting mechanism comprises a bearing seat and a floating support, the bearing seat is fixed on the equipment frame and is provided with a bearing, one end of the floating support is rotatably connected with the bearing through a rotating shaft and can be limited through the bearing seat, and the floating supports on two sides are connected into a whole through the main shaft.

7. The floating straightening device as claimed in claim 6, wherein the floating support is constructed as a swing arm with a plate-shaped structure, the two swing arms are arranged oppositely and parallelly, one end of each swing arm is sleeved on the rotating shaft, and the other end of each swing arm can swing relative to the bearing seat under the action of external force, so that the height of the floating support can be adjusted along with the production form of the section steel.

8. The floating straightener of claim 7, wherein a running gear is provided on the side of the swing arm opposite to the secondary roller mechanism, the running gear comprising: the second driving device is fixed on the swing arm; and one end of the guide component is connected with the second driving device, and the other end of the guide component is connected with the auxiliary roller mechanism, and the guide component can drive the auxiliary roller mechanism to move and position along a single direction under the driving of the second driving device.

9. The floating straightener of claim 8 wherein the guide assembly comprises: the lead screw penetrates through the swing arm and is connected with the second driving device; and the nut is arranged on the sliding block seat and is in threaded connection with the lead screw, and a motor output shaft of the second driving device is used for driving the lead screw to rotate so as to drive the nut to move.

10. The floating straightening device according to claim 9, wherein an encoder is further arranged on the motor output shaft side of the second driving device, and the encoder is used for feeding back the number of revolutions of the motor output shaft so as to obtain the position of the counter roller in the axial direction of the main shaft through a control system.