CN110877064A

CN110877064A - Thermal straightening machine

Info

Publication number: CN110877064A
Application number: CN201911360327.9A
Authority: CN
Inventors: 王勇; 李盛; 蒋周强; 王铁男; 王家勋; 邓伟
Original assignee: CISDI Engineering Co Ltd
Current assignee: CISDI Engineering Co Ltd
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2020-03-13
Anticipated expiration: 2039-12-25
Also published as: CN110877064B

Abstract

The invention belongs to the field of steel rolling, and relates to a hot straightening machine, which comprises a housing, a press-down roller bending device, a balancing device, a press-down AGC cylinder, an upper roller box, a lower roller box, an upper roller box clamping device, a lower roller box clamping device, a connecting shaft bracket, a transmission device and a roller changing device, wherein the press-down AGC cylinder is arranged on the housing; the transmission side of the working roll system adopts a needle bearing, a cylindrical roller bearing or a sliding bearing structure. The invention breaks through the problem that the straightening plate cannot meet the product quality requirement due to the larger roller diameter or the straightening roller/universal joint is easy to damage due to the smaller roller diameter to influence the production; the method thoroughly changes the current situations that the diameter of the roller of the hot straightening machine is too large, the straightening plate cannot meet the product quality requirement, or the diameter of the roller is too small, and the straightening roller/universal joint is easy to damage, obviously improves the straightening flatness of the plate, obviously improves the product quality and has more obvious straightening effect on the plate, especially on a wide, thin and high-strength plate under the condition of reliable and normal production and covering the specification range of the plate to be straightened, thereby bringing potential and larger profit effect.

Description

Thermal straightening machine

Technical Field

The invention belongs to the field of steel rolling, and relates to a hot straightening machine.

Background

At present, hot straightening machines widely applied to the field of steel rolling, in particular to a plate hot straightening machine, cannot meet the product quality requirement due to the fact that the straightening flatness of a plate cannot meet the product quality requirement due to the fact that the diameter of a straightening roller is too large, or often twist or break due to the fact that the diameter of the straightening roller is too small, and production is seriously influenced.

a) In the plate hot straightening machine with the plate width of 3800mm or more, the diameter of the straightening roller of the hot straightening machine under the conditions is larger due to the constraints of various conditions such as wide rigidity, structure, thermal deformation, lubrication and the like.

For a 3800-4300 mm plate hot straightening machine, the roller diameter is 280mm or 285mm and above; for a plate hot straightener with the width of 5000mm up and down, the roller diameter is 320mm or 360mm and above. Because the roller diameter of the traditional 3800mm wide plate hot straightening machine type is larger, the hot straightening effect of wide and thin plates, particularly wide, thin and high-strength plates is not obvious, and even the product quality requirement of the plate straightness can not be met.

b) For 2800mm to 3500mm sheet hot straightening machines, the lower limit of the straightening roll diameter is usually 280mm or 285mm, and the minimum diameter is 220 mm. For the roller diameter machine type of 280mm or 285mm, the situation is the same as the situation a; for a 220mm roller diameter machine type, because the roller diameter is smaller, the straightening of a slightly thick plate, especially a slightly thick high-strength plate, a straightening roller, a universal joint and the like are often twisted or broken, and the production is seriously influenced.

c) In the case of a hot plate straightener having a width of 2800mm or less, which is usually an old-fashioned, laggard electric straightener, the lower limit of the roll diameter of the straightening roll is usually 285mm or 300mm or more, as in the case of a.

The invention provides a novel hot straightening machine technology, which aims to solve the problems that the roller diameter is larger, and the straightening of a wide, thin and high-strength plate cannot meet the quality requirement of a plate flatness product; meanwhile, the problems that the straightening of a slightly thick and high-strength plate with a small roller diameter and the production is seriously influenced due to frequent distortion or breakage of a straightening roller and a universal joint are solved.

Disclosure of Invention

In view of the above, the present invention aims to provide a thermal straightening machine, which breaks through the problem that the straightening plate cannot meet the product quality requirement due to the larger roller diameter limit of the conventional machine type or the straightening roller/universal joint is easy to damage due to the smaller roller diameter limit of the conventional machine type, and the production is affected, wherein the diameter of the straightening roller breaks through the range below 285mm (and below 220 mm), and under the condition that the straightening machine (including the straightening roller/universal joint) can reliably and normally produce and cover the specification range of the plate to be straightened, the straightening effect on the plate, especially on the wide and thin high-strength plate, can be obviously improved, and the product quality is obviously improved.

In order to achieve the purpose, the invention provides the following technical scheme:

a hot straightening machine comprises a housing, a press-down roller bending device, a balancing device, a press-down AGC cylinder, an upper roller box, a lower roller box, an upper roller box clamping device, a lower roller box clamping device, a connecting shaft bracket, a transmission device and a roller changing device; the upper roller box is connected with the pressing and bending roller device through an upper roller box clamping device, a pressing AGC cylinder connected between the housing and the pressing and bending roller device drives the pressing and bending roller device to drive the upper roller box to move up and down and tilt, and the balancing device is connected between the housing and the pressing and bending roller device and follows up and down along with the pressing and bending roller device; the lower roller box is connected with the base through a lower roller box clamping device, and the base is connected with the memorial archway; the transmission device is connected with the straightening roller to complete transmission; when the roll is changed, the roll changing device moves the roll box out of or into the straightening machine through the auxiliary connecting shaft bracket; the transmission side of the working roll system adopts a needle bearing, a cylindrical roller bearing or a sliding bearing structure.

Optionally, the transmission side of the working roll system adopts a needle bearing, a cylindrical roller bearing, or a composite structure of a sliding bearing and a bending compensation structure.

Optionally, the transmission side of the working roller system adopts a needle bearing, which comprises a needle bearing with the width of a bearing inner ring equal to or smaller than or larger than that of a bearing outer ring, or a needle bearing without a bearing inner ring, or a special type of needle bearing, or a combined needle bearing, or a combination of a needle bearing and a non-needle bearing; or the transmission side of the working roller system adopts a cylindrical roller bearing, and the cylindrical roller bearing comprises a cylindrical roller bearing with the width of a bearing inner ring equal to or smaller than or larger than the width of a bearing outer ring, or a cylindrical roller bearing without a bearing inner ring, or a special type cylindrical roller bearing, or a combined cylindrical roller bearing, or a combination of the cylindrical roller bearing and a non-cylindrical roller bearing; or the transmission side of the working roll system adopts sliding bearings which comprise self-lubricating sliding bearings or sliding bearings lubricated by external oil.

Optionally, the transmission side of the working roll system adopts a compensation bending structure, and the cylindrical centering compensation structure, the spherical hinge centering compensation structure or the T-shaped groove centering compensation structure comprises a dovetail T-shaped groove compensation structure.

Optionally, the smallest roll diameter of the straightening roll of the straightening machine is as follows: for a hot straightening machine with the diameter of 3500mm or less, the minimum roll diameter of a straightening roll breaks through 285 mm-150 mm; the hot straightener of 3500mm or more comprises a 3800mm hot straightener, a 4300mm hot straightener, a 4700mm hot straightener, a 5000mm hot straightener and a 5500mm hot straightener, and the minimum roll diameter of the straightening roll breaks through 285-220 mm.

Optionally, the bearing on the operating side of the working roll system adopts a self-aligning roller bearing, a spherical roller bearing, a tapered roller bearing, a CARB circular ring roller bearing, or a combination thereof; the needle roller bearing structure or the cylindrical roller bearing structure on the transmission side of the working roller system comprises a needle roller bearing or a cylindrical roller bearing, a seal ring seal and a labyrinth seal structure.

Optionally, the operating side of the working roll system adopts a compensation bending structure; or the transmission side and the operation side of the working roll system both adopt a compensation bending structure; or each bearing seat of the working roll system or the combined integral bearing seat adopts a bending compensation structure.

Optionally, the hot straightening machine is used for a plate hot straightening machine in the field of steel rolling, and comprises a plate and strip straightening machine for stretching and bending combined straightening; the hot straightening machine and the cold straightening machine are suitable for the steel rolling field, and comprise a section hot straightening machine, a section cold straightening machine, a pipe hot straightening machine and a pipe cold straightening machine in the steel rolling field.

Optionally, the type of the straightening machine adopts a double type, or quadruple type, or sextuple type straightening machine; the type of the straightening machine adopts a hydraulic type, an electric type or a hydraulic and electric combined type; the transmission of the straightening machine adopts a centralized transmission type, a grouped transmission type or an independent transmission type; the number of the straightening rollers of the straightening machine is 5 rollers, 7 rollers, 9 rollers, 11 rollers, 13 rollers, 15 rollers, 17 rollers or 19 rollers.

Optionally, the roller type of the straightening machine adopts a press-splitting roller type structure, a built-in roller type structure or a beveling roller type structure; or the upper roller system adopts a roller bending type, or both the upper roller system and the lower roller system adopt a roller bending type; or the number of the bending roller cylinders is divided into groups, and each group comprises 1 cylinder, 2 cylinders or 3 cylinders.

Optionally, the straightening roll spacing of the straightening roll system adopts a fixed roll spacing type or a variable roll spacing type; each straightening roller is an independent lifting adjusting mechanism, or part of the straightening rollers are independent lifting adjusting mechanisms; the whole or part of the upper roller box straightening roller is an independent lifting adjusting mechanism, or the whole or part of the lower roller box straightening roller is an independent lifting adjusting mechanism; or all or part of the upper roll box straightening roll and the lower roll box straightening roll are independent lifting adjusting mechanisms; the straightening roller and the universal spindle of the straightening machine adopt a staggered structure or a non-staggered structure.

Optionally, the housing of the straightening machine adopts an integral rolling plate type or a split pre-tensioning rod type structure type; the pressing AGC cylinder of the straightener adopts a conventional AGC cylinder or a booster AGC cylinder type; the number of the AGC cylinders for pressing is 2, 4 or 6.

The invention has the beneficial effects that:

the invention overcomes the problems of very narrow radial space and small neck at the transmission side shaft of the straightening roller caused by a rolling bearing. Aiming at the defect that the aligning function of a needle bearing, a cylindrical roller bearing or a sliding bearing is low, a bending compensation structure is designed, namely a composite structure of the needle bearing, the cylindrical roller bearing or the sliding bearing and the bending compensation structure is adopted on the transmission side.

The invention thoroughly changes the current situation that the straightening plate cannot meet the product quality requirement due to the large roller diameter limit of the hot straightening machine or the straightening roller/universal joint is easy to damage due to the small roller diameter limit of the hot straightening machine.

The core structure is suitable for hot plate straightening machines of various structural types in the steel rolling field, and is also suitable for non-plate hot straightening machines and non-plate cold straightening machines of various structural types in the steel rolling field. The existing invention can be fully utilized, local modification and lower modification cost are adopted to be widely applied to modification of the existing old straightening machine, the embarrassing situations of large modification investment and long construction period of the old straightening machine in a plurality of current steel rolling mills are thoroughly changed, and revolutionary change is brought to the modification of the old straightening machine.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.

Drawings

For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:

FIG. 1 is a front longitudinal view of a novel thermal straightener of an embodiment of the present invention;

FIG. 2 is an enlarged view of

members

8, 9, 19, 20 and 21 of FIG. 1;

FIG. 3 is an enlarged view of the upper straightening roll (drive side) member 20 and the member 21 of FIG. 2 according to the present invention;

fig. 4 is an enlarged view of the lower straightening roll (drive side)

members

20, 21 of fig. 2 according to the present invention.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.

Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.

Referring to fig. 1-4, the reference numbers in the figures refer to the following elements: the automatic roll pressing and bending device comprises a pressing and bending roll device 1, a memorial archway 2, a balancing device 3, a pressing AGC cylinder 4, an upper roll box 5, an upper roll box clamping device (operation side) 6, a supporting roll (upper) 7, a straightening roll (upper) 8, a straightening roll (lower) 9, a supporting roll (lower) 10, a lower roll box clamping device (operation side) 11, a lower roll box 12, a roll changing device 13, a base 14, a lower roll box clamping device (transmission side) 15, a connecting shaft bracket 16, a transmission device 17, an upper roll box clamping device (transmission side) 18, a bearing 19 on the operation side, a bearing 20 on the transmission side, a bending compensation structure 21, an O-shaped seal 22, a framework seal 23 and a labyrinth seal 24.

The invention relates to a hot straightening machine, which comprises a housing 2, a pressing roller bending device 1, a balancing device 3, a pressing AGC cylinder 4, an upper roller box 5, a lower roller box 12, an upper roller box clamping device, a lower roller box clamping device, a connecting shaft bracket 16, a transmission device 17 and a roller changing device 13; the upper roller box 5 is connected with the press-down roller bending device 1 through an upper roller box clamping device, a press-down AGC cylinder 4 connected between the housing 2 and the press-down roller bending device 1 drives the press-down roller bending device 1 to drive the upper roller box 5 to move up and down and tilt, and the balancing device 3 is connected between the housing 2 and the press-down roller bending device 1 and follows up and down along with the press-down roller bending device 1; the lower roller box 12 is connected with a base 14 through a lower roller box clamping device, and the base 14 is connected with the memorial archway 2; the transmission device 17 is connected with the straightening roller to complete transmission; when the roll is changed, the roll changing device 13 assists to move the roll box out of or into the straightening machine through the connecting shaft bracket 16; the transmission side of the working roll system adopts a needle bearing, a cylindrical roller bearing or a sliding bearing structure.

Wherein, the upper roll box clamping device comprises an upper roll box clamping device (operation side) 6 and an upper roll box clamping device (transmission side) 18; the lower roll box clamping device comprises a lower roll box clamping device (operation side) 11 and a lower roll box clamping device (transmission side) 15; the straightening rollers comprise an upper straightening roller (upper) 8 and a lower straightening roller (lower) 9; the upper roller box comprises a straightening roller (upper) 8 and a supporting roller (upper) 7; the lower roll box comprises a straightening roll (lower) 9 and a supporting roll (lower) 10.

Optionally, the bearing 20 on the transmission side of the work roll system adopts a needle bearing, which comprises a needle bearing with the width of a bearing inner ring equal to or smaller than or larger than that of a bearing outer ring, or a needle bearing without a bearing inner ring, or a special type of needle bearing, or a combined needle bearing, or a combination of a needle bearing and a non-needle bearing; or the transmission side of the working roller system adopts a cylindrical roller bearing, and the cylindrical roller bearing comprises a cylindrical roller bearing with the width of a bearing inner ring equal to or smaller than or larger than the width of a bearing outer ring, or a cylindrical roller bearing without a bearing inner ring, or a special type cylindrical roller bearing, or a combined cylindrical roller bearing, or a combination of the cylindrical roller bearing and a non-cylindrical roller bearing; or the transmission side of the working roll system adopts sliding bearings which comprise self-lubricating sliding bearings or sliding bearings lubricated by external oil.

Optionally, the transmission side of the working roll system adopts a compensation bending structure 21, and the transmission side adopts a cylindrical centering compensation structure, a spherical hinge centering compensation structure or a T-shaped groove centering compensation structure which comprises a dovetail T-shaped groove compensation structure; the operation side of the working roll system adopts a compensation bending structure 21; or the transmission side and the operation side of the working roll system adopt the compensation bending structure 21; or each bearing seat of the working roll system or the combined integral bearing seat adopts a compensation bending structure 21.

Specifically, the needle roller bearing structure or the cylindrical roller bearing structure on the transmission side of the working roller system comprises a needle roller bearing or a cylindrical roller bearing, an O-shaped seal 22, a skeleton seal 23 and a labyrinth seal 24 structure; the bearing 19 on the operating side of the working roll system adopts a self-aligning roller bearing, a spherical roller bearing, a tapered roller bearing, a CARB circular ring roller bearing or a combination thereof.

The hot straightening machine is used for a plate hot straightening machine in the field of steel rolling and comprises a plate and strip straightening machine for stretching and bending combined straightening; the non-plate hot straightener and the non-plate cold straightener which are simultaneously suitable for the steel rolling field comprise a section hot straightener, a section cold straightener, a pipe hot straightener and a pipe cold straightener in the steel rolling field; the type of the straightening machine adopts a double type, or quadruple type, or sextuple type straightening machine; the type of the straightening machine adopts a hydraulic type, an electric type or a hydraulic and electric combined type; the transmission of the straightening machine adopts a centralized transmission type, a grouped transmission type or an independent transmission type; the number of the straightening rollers of the straightening machine adopts 5 rollers, or 7 rollers, or 9 rollers, or 11 rollers, or 13 rollers, or 15 rollers, or 17 rollers, or 19 rollers; the roller type of the straightening machine adopts a press-splitting roller type structure, or a built-in roller type structure, or a beveling roller type structure; or the upper roller system adopts a roller bending type, or both the upper roller system and the lower roller system adopt a roller bending type; or the number of the bending cylinders is divided into a plurality of groups, and each group comprises 1 or 2 or 3 cylinders; the memorial archway 2 of the straightening machine adopts an integral rolling plate type or a split pre-tensioning rod type structure type; the pressing AGC cylinder of the straightener adopts a conventional AGC cylinder or a booster AGC cylinder type; the number of the AGC cylinders for pressing is 2, 4 or 6.

In the invention, the straightening roll spacing of the straightening roll system adopts a fixed roll spacing type or a variable roll spacing type; each straightening roller is an independent lifting adjusting mechanism, or part of the straightening rollers are independent lifting adjusting mechanisms; the whole or part of the straightening roll of the upper roll box 5 is an independent lifting adjusting mechanism, or the whole or part of the straightening roll of the lower roll box 12 is an independent lifting adjusting mechanism; or the straightening rolls of the upper roll box 5 and the straightening rolls of the lower roll box 10 are all or partially independent lifting adjusting mechanisms; the straightening roller and the universal spindle of the straightening machine adopt a staggered structure or a non-staggered structure.

Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.

Claims

1. A hot straightening machine is characterized by comprising a housing, a pressing roller bending device, a balancing device, a pressing AGC cylinder, an upper roller box, a lower roller box, an upper roller box clamping device, a lower roller box clamping device, a connecting shaft bracket, a transmission device and a roller changing device; the upper roller box is connected with the pressing and bending roller device through an upper roller box clamping device, a pressing AGC cylinder connected between the housing and the pressing and bending roller device drives the pressing and bending roller device to drive the upper roller box to move up and down and tilt, and the balancing device is connected between the housing and the pressing and bending roller device and follows up and down along with the pressing and bending roller device; the lower roller box is connected with the base through a lower roller box clamping device, and the base is connected with the memorial archway; the transmission device is connected with the straightening roller to complete transmission; when the roll is changed, the roll changing device moves the roll box out of or into the straightening machine through the auxiliary connecting shaft bracket; the transmission side of the working roll system adopts a needle bearing, a cylindrical roller bearing or a sliding bearing structure.

2. The thermal straightener of claim 1, wherein the drive side of the work roll train is a needle bearing, or a cylindrical roller bearing, or a composite of a sliding bearing and a bend compensation structure.

3. The hot straightener as claimed in claim 1, wherein the drive side of the work roll train employs needle bearings, including needle bearings with inner race width equal to or smaller than or larger than the outer race width of the bearing, or needle bearings without inner race, or special types of needle bearings, or combined needle bearings, or a combination of needle bearings and non-needle bearings; or the transmission side of the working roller system adopts a cylindrical roller bearing, and the cylindrical roller bearing comprises a cylindrical roller bearing with the width of a bearing inner ring equal to or smaller than or larger than the width of a bearing outer ring, or a cylindrical roller bearing without a bearing inner ring, or a special type cylindrical roller bearing, or a combined cylindrical roller bearing, or a combination of the cylindrical roller bearing and a non-cylindrical roller bearing; or the transmission side of the working roll system adopts sliding bearings which comprise self-lubricating sliding bearings or sliding bearings lubricated by external oil.

4. The thermal straightener of claim 1, wherein the drive side of the work roll system is a swept structure and the cylindrical centering compensation structure, or the spherical hinge centering compensation structure, or the T-slot centering compensation structure comprises a dovetail T-slot compensation structure.

5. The thermal straightener as claimed in claim 1, wherein the straightener has a minimum roll diameter of the straightener roll: for a hot straightening machine with the diameter of 3500mm or less, the minimum roll diameter of a straightening roll breaks through 285 mm-150 mm; the hot straightener of 3500mm or more comprises a 3800mm hot straightener, a 4300mm hot straightener, a 4700mm hot straightener, a 5000mm hot straightener and a 5500mm hot straightener, and the minimum roll diameter of the straightening roll breaks through 285-220 mm.

6. The thermal straightener as claimed in claim 1, wherein the bearing of the work roll system on the operating side is a self-aligning roller bearing, or a spherical roller bearing, or a tapered roller bearing, or a CARB toroidal roller bearing, or a combination thereof; the needle roller bearing structure or the cylindrical roller bearing structure on the transmission side of the working roller system comprises a needle roller bearing or a cylindrical roller bearing, a seal ring seal and a labyrinth seal structure.

7. The thermal straightener of claim 1, wherein the work roll system operating side is of a buckle structure; or the transmission side and the operation side of the working roll system both adopt a compensation bending structure; or each bearing seat of the working roll system or the combined integral bearing seat adopts a bending compensation structure.

8. The hot straightening machine as claimed in claim 1, wherein the hot straightening machine is used for a hot plate straightening machine in the field of steel rolling, and comprises a plate strip straightening machine for straightening by combination of stretching and bending; the hot straightening machine and the cold straightening machine are suitable for the steel rolling field, and comprise a section hot straightening machine, a section cold straightening machine, a pipe hot straightening machine and a pipe cold straightening machine in the steel rolling field.

9. The thermal straightener as claimed in claim 1, wherein the straightener type employs a double, or quadruple, or sextuplex straightener; the type of the straightening machine adopts a hydraulic type, an electric type or a hydraulic and electric combined type; the transmission of the straightening machine adopts a centralized transmission type, a grouped transmission type or an independent transmission type; the number of the straightening rollers of the straightening machine is 5 rollers, 7 rollers, 9 rollers, 11 rollers, 13 rollers, 15 rollers, 17 rollers or 19 rollers.

10. The thermal straightening machine as claimed in claim 1, wherein the roll bending type of the straightening machine adopts a press-split roll bending type structure, or a built-in roll bending type structure, or a chamfered roll bending type structure; or the upper roller system adopts a roller bending type, or both the upper roller system and the lower roller system adopt a roller bending type; or the number of the bending roller cylinders is divided into groups, and each group comprises 1 cylinder, 2 cylinders or 3 cylinders.

11. The thermal straightener as claimed in claim 1, wherein the straightening roll gap of the straightening roll system is of a fixed roll gap type or a variable roll gap type; each straightening roller is an independent lifting adjusting mechanism, or part of the straightening rollers are independent lifting adjusting mechanisms; the whole or part of the upper roller box straightening roller is an independent lifting adjusting mechanism, or the whole or part of the lower roller box straightening roller is an independent lifting adjusting mechanism; or all or part of the upper roll box straightening roll and the lower roll box straightening roll are independent lifting adjusting mechanisms; the straightening roller and the universal spindle of the straightening machine adopt a staggered structure or a non-staggered structure.

12. The thermal straightener as claimed in claim 1, wherein the straightener housing is of an integral rolled plate type or a split pre-tensioned rod type; the pressing AGC cylinder of the straightener adopts a conventional AGC cylinder or a booster AGC cylinder type; the number of the AGC cylinders for pressing is 2, 4 or 6.