CN116372053A

CN116372053A - Straightening device special for cold-rolled ribbed steel bar and straightening method thereof

Info

Publication number: CN116372053A
Application number: CN202310290033.3A
Authority: CN
Inventors: 耿伟; 施建焕; 孙锡钢; 许平; 王玉秀
Original assignee: China Construction Second Engineering Bureau Co Ltd
Current assignee: China Construction Second Engineering Bureau Co Ltd
Priority date: 2023-03-23
Filing date: 2023-03-23
Publication date: 2023-07-04

Abstract

The invention relates to the technical field of straightening devices, and discloses a special straightening device for cold-rolled ribbed steel bars and a straightening method thereof, wherein the straightening device comprises the following components: the straightening device comprises a base and a transmission case, wherein a straightening mechanism is arranged on the transmission case, a motor is arranged on the base, the output end of the motor extends into the base and is connected with a first transmission column, the other end of the first transmission column is rotationally connected with the inner wall of the base, two first bevel gears are fixedly sleeved on the outer surface of the first transmission column, the lower end of the transmission case is connected with a second transmission column through a bearing, the lower end of the second transmission column is fixedly connected with a second bevel gear, the upper end of the second transmission column is fixedly connected with a column gear, the lower end of the rear side of the transmission case is connected with a third transmission column through a bearing, the third transmission column is connected with a first end face gear, the upper end of the transmission case is in threaded connection with a first threaded column, the lower end of the first threaded column is connected with a movable frame through a bearing, the front end and the rear end of the lower side of the movable frame is connected with a fourth transmission column through a bearing, and the fourth transmission column is provided with a second end face gear.

Description

Straightening device special for cold-rolled ribbed steel bar and straightening method thereof

Technical Field

The invention relates to the technical field of straightening devices, in particular to a straightening device special for cold-rolled ribbed steel bars and a straightening method thereof.

Background

The cold-rolled ribbed steel bar is a steel bar with three or two transverse ribs uniformly distributed along the length direction on the surface after cold rolling of the hot-rolled round wire rod, and is mainly used for building construction, and the cold-rolled ribbed steel bar is used for weaving a frame and matched with mixed cement, so that the building is more firm and durable.

In the prior art, after the small-caliber cold-rolled ribbed bars are produced and delivered, basically, the small-caliber cold-rolled ribbed bars are wound into bundles, when the small-caliber cold-rolled ribbed bars are required to be used, the bundles of cold-rolled ribbed bars are straightened in a factory by using a cold-rolled ribbed bar straightening device, then cut into required long and short sections, the strip-shaped cold-rolled ribbed bars are subjected to bending splicing according to building requirements, when defective products generated in the bending process are required to be recycled for the second time, the whole of the conventional cold-rolled ribbed bar straightening device is generally huge, the conventional cold-rolled ribbed bar straightening device is used on a construction site and is easily influenced by the site, and a plurality of inconveniences exist.

Disclosure of Invention

The application provides a straightening device special for cold rolled ribbed steel bars and a straightening method thereof, which aim to solve the problems in the background technology.

For solving above-mentioned technical problem, this application provides a special straightener of cold rolling rib reinforcing bar, includes: the automatic straightening device comprises a base and a plurality of transmission boxes arranged at the top of the base, wherein a straightening mechanism is arranged on the outer side of each transmission box, a motor is fixedly arranged on one side of each base, the output end of each motor extends into the base and is connected with a first transmission column, the other end of each first transmission column is rotationally connected with the inner wall of the base, two first bevel gears are fixedly sleeved on the outer surface of each first transmission column, the lower end of each transmission box is connected with a second transmission column through a bearing, the lower end of each second transmission column is fixedly connected with a second bevel gear, the upper end of each second transmission column is fixedly connected with a column gear, the lower end of each transmission box is connected with a third transmission column through a bearing, the first transmission column is fixedly connected with a first end face gear, the upper end of each transmission box is in threaded connection with a first threaded column, the lower end of each first threaded column is connected with a movable frame through a bearing, the front end and the lower side of each movable frame are connected with a fourth transmission column through a bearing, and the fourth transmission column is provided with a second end face gear, and the second end face gear are arranged on the fourth transmission column and the straightening mechanism are connected with the outer sides of the fourth transmission columns respectively.

In some embodiments of the present application, the straightening mechanism includes a first spacing wheel connected to the outer end of the fourth transmission column, a second spacing wheel connected to the outer end of the third transmission column, a first connecting column arranged at the top of the base and on the front side of the first spacing wheel, and a second connecting column arranged between adjacent second spacing wheels, wherein the top of the first connecting column is provided with a feed inlet, the top of the second connecting column is transversely provided with a feed conveying pipe, and the feed inlet is funnel-shaped.

In some embodiments of the present application, the first bevel gear and the second bevel gear are engaged with each other, and the second driving post is connected to the top plate of the base through a bearing.

In some embodiments of the present application, a third connecting column is fixedly connected to the lower end of the front end of the inner cavity of the transmission case, and the third connecting column is connected to the outer surface of the second connecting column through a bearing.

In some embodiments of the present application, the post gear respectively with first terminal surface gear and second terminal surface gear intermeshing, the sliding tray has been vertically seted up to the upper end of transmission case front side, the activity of fourth transmission post cup joints in the sliding tray, remove the inner wall swing joint of frame and transmission case, the upper end fixedly connected with runner of first screw thread post.

In some embodiments of the application, first spacing groove has been seted up at the inside center of first spacing wheel, the outside of first spacing wheel is the arc curved surface, a plurality of second spacing grooves have been seted up on the arc curved surface, the screw hole has been seted up at the rear end center of first spacing wheel, the locating part has been cup jointed to the activity in the second spacing inslot, the moving part has been cup jointed to the activity in the first spacing inslot.

In some embodiments of the present application, the locating part is including extending to the fourth spliced pole in the first spacing inslot, set up in the spacing hemisphere of fourth spliced pole, set up in the fifth spliced pole of fourth spliced pole other end, and set up in the spacing piece that fourth spliced pole one end was kept away from to the fifth spliced pole, the spring has been cup jointed in the outside activity of fifth spliced pole, the outside of spacing piece is provided with the second antislip strip, fourth spliced pole and fifth spliced pole activity cup joint in the second spacing inslot.

In some embodiments of the present application, the moving member includes a stopper disposed in the first limiting groove, a second threaded column connected to the stopper, and a rotating groove disposed on one side of the second threaded column away from the stopper, where the stopper and the second threaded column are connected through a bearing, and the second threaded column is adapted to a threaded hole of the first limiting wheel, and the stopper is cone-shaped.

In some embodiments of the present application, the second limiting wheel includes the wheel body and set up in the fixed cover in the wheel body outside, the outside fixedly connected with first antislip strip of fixed cover, wheel body and third transmission post fixed connection.

In some embodiments of the present application, a straightening method of a straightening device special for cold rolled ribbed steel bars includes the following specific steps:

step one: according to the bending degree and the outer diameter of the cold-rolled ribbed steel bar, the distance between the first limiting wheel and the second limiting wheel is adjusted, the rotating wheel at the left end of the rotating device drives the first threaded column to rotate, the first threaded column vertically moves to push the moving frame to descend, the fourth driving column drives the first limiting wheel to descend in the sliding groove, the second end face gear slides and descends on the outer surface of the column gear, and the distance between the first anti-slip strip at the left end of the device and the limiting piece is changed;

step two: according to the distance between the first anti-slip strip at the left end of the device and the limiting piece, the first threaded column at the right end of the device is rotated, so that the distance between the first anti-slip strip at the right end and the limiting piece is slightly smaller than the distance between the first anti-slip strip at the left end and the limiting piece;

step three: starting a motor to drive a first transmission column to rotate, wherein the first transmission column drives a first bevel gear to rotate, the first bevel gear drives a second bevel gear to rotate, so that a column gear at the upper end of the second transmission column is driven to rotate, the column gear drives a first end face gear and a second end face gear to rotate, the first end face gear drives a third transmission column and a second limiting wheel to rotate, and the second end face gear drives a fourth transmission column and the first limiting wheel to rotate, so that two first limiting wheels and two second limiting wheels are both rotated;

step four: putting a straight end of a bent cold-rolled ribbed steel bar into a feeding hole, enabling the cold-rolled ribbed steel bar to enter a conveying pipe under the driving of rotation of a second anti-slip strip on a first anti-slip strip matched limiting piece at the left end of the device, enabling the cold-rolled ribbed steel bar to come out of the conveying pipe after the first anti-slip strip matched with the second anti-slip strip on the limiting piece at the right end of the device rotates, finishing rolling and straightening once, and repeating the operation once;

step five: after stopping; rotating the first threaded column at the left end of the device again, reducing the distance between the first anti-slip strip at the left end of the device and the limiting piece, and repeating the second to fourth operations;

step six: if the shortest distance between the first limiting wheel and the second limiting wheel is reached, the second threaded column is rotated through the rotating groove at the left end of the device to drive the limiting block to move towards the front end, and due to the design of the shape of the limiting block, the limiting block can push the limiting hemisphere, so that the fourth connecting column and the fifth connecting column push out the limiting piece and the second anti-slip strip outwards, and the distance between the limiting piece at the left end of the device, the second anti-slip strip and the first anti-slip strip is reduced;

step seven: the second threaded column is rotated through a rotating groove at the right end of the device, so that the distance between the limiting piece at the right end of the device and the second anti-slip strip and the first anti-slip strip is slightly smaller than the distance between the limiting piece at the left end of the device and the second anti-slip strip and the first anti-slip strip;

step eight: repeating the third step and the fourth step, and analogizing the cold-rolled ribbed steel bars in sequence to straighten the cold-rolled ribbed steel bars.

Compared with the prior art, the invention has the following characteristics and beneficial effects:

according to the invention, the structure of a motor, a column gear, a third transmission column, a material conveying pipe and the like is adopted, the device is small in size, the first bevel gear is driven by the motor to drive the second bevel gear to rotate, then the driving structure is reduced by the meshing mode of the column gear, the first end face gear and the third transmission column, the driving structure is simultaneously driven to rotate, meanwhile, the first limit wheel and the second limit wheel at the left end are matched with the first limit wheel and the second limit wheel at the right end, and the material conveying pipe and the material inlet are used for gradually straightening the steel bars for multiple times, so that the device is small in size and can also complete the correction effect;

according to the invention, the first limit wheel descends by rotating the first threaded column, the first threaded column pushes the movable frame to descend, the fourth transmission column drives the first limit wheel to descend in the sliding groove, and the limit piece on the first limit wheel and the second limit wheel act on the steel bar together, so that the first limit bar is matched with the second limit bar on the first limit wheel and acts on the transverse rib outside the steel bar, and the steel bar is prevented from skidding in the rolling driving process.

Drawings

FIG. 1 is a schematic view of the overall structure of an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a base of an embodiment of the present invention;

FIG. 3 is a schematic view of the external structure of a transmission case according to an embodiment of the present invention;

FIG. 4 is a schematic view of the internal structure of a transmission case according to an embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view of a first spacing wheel according to an embodiment of the present invention;

FIG. 6 is an exploded view of a first spacing wheel and a moving member according to an embodiment of the present invention;

FIG. 7 is a schematic view of a limiting member according to an embodiment of the present invention;

fig. 8 is an exploded view of a second spacing wheel according to an embodiment of the present invention.

100, a base; 110. a first drive post; 120. a first bevel gear; 130. a second drive post; 131. a second bevel gear; 132. a post gear; 200. a transmission case; 210. a third drive post; 211. a first end face gear; 220. a first threaded post; 221. a rotating wheel; 230. a moving rack; 240. a fourth drive post; 241. a second face gear; 250. a third connecting column; 260. a sliding groove; 300. a straightening mechanism; 310. a first limit wheel; 311. a first limit groove; 312. the second limit groove; 313. a threaded hole; 320. the second limiting wheel; 321. a wheel body; 322. a fixed sleeve; 323. a second cleat; 330. a first connection post; 340. a feed inlet; 350. a second connection post; 360. a material conveying pipe; 370. a limiting piece; 371. a fourth connecting column; 372. a limit hemisphere; 373. a fifth connecting column; 374. a spring; 375. a limiting piece; 376. a first cleat; 380. a moving member; 381. a limiting block; 382. a second threaded post; 383. a rotating groove; 400. and a motor.

Detailed Description

The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.

In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

The terms "first," "second," and the like, 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. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

As shown in fig. 1-8, in accordance with some embodiments of the present application, a straightening apparatus for cold rolled ribbed steel bars comprises: the straightening mechanism comprises a base 100 and a plurality of transmission boxes 200 arranged at the top of the base 100, wherein a straightening mechanism 300 is arranged at the outer side of the transmission boxes 200, a motor 400 is fixedly arranged at one side of the base 100, the output end of the motor 400 extends into the base 100 and is connected with a first transmission column 110, the other end of the first transmission column 110 is rotationally connected with the inner wall of the base 100, two first bevel gears 120 are fixedly sleeved on the outer surface 322 of the first transmission column 110, the lower end of the transmission boxes 200 is connected with a second transmission column 130 through bearings, the lower end of the second transmission column 130 is fixedly connected with a second bevel gear 131, the upper end of the second transmission column 130 is fixedly connected with a column gear 132, the lower end of the rear side of the transmission boxes 200 is connected with a third transmission column 210 through bearings, the upper end of the third transmission column 210 is fixedly connected with a first end face gear 211, the upper end of the transmission boxes 200 is in threaded connection with a first thread column 220, the lower end of the first thread column 220 is connected with a movable frame 230 through bearings, the front and rear ends of the lower sides of the movable frame 230 are connected with a fourth transmission column 240 through bearings, the fourth transmission column 240 is provided with a second end face gear 241, the second end face gear 241 is fixedly connected with the second end face gear 211 and the outer sides of the second end face gear 300 are respectively connected with the straightening mechanism 300.

According to some embodiments of the present application, the straightening mechanism 300 includes a first limiting wheel 310 connected to the outer end of the fourth driving column 240, a second limiting wheel 320 connected to the outer end of the third driving column 210, a first connecting column 330 disposed at the top of the base 100 and on the front side of the first limiting wheel 310, and a second connecting column 350 disposed between adjacent second limiting wheels 320, wherein a feed inlet 340 is disposed at the top of the first connecting column 330, a feed conveying pipe 360 is transversely disposed at the top of the second connecting column 350, and the feed inlet 340 is funnel-shaped.

According to some embodiments of the present application, the first bevel gear 120 and the second bevel gear 131 are engaged with each other, and the second driving post 130 is coupled to the top plate of the base 100 through a bearing.

According to some embodiments of the present application, a third connection post 250 is fixedly connected to the lower end of the front end of the inner cavity of the transmission case 200, and the third connection post 250 is connected to the outer surface of the second connection post 350 through a bearing.

According to some embodiments of the present application, the post gear 132 is meshed with the first end face gear 211 and the second end face gear 241, the upper end of the front side of the transmission case 200 is vertically provided with a sliding groove 260, the fourth transmission post 240 is movably sleeved in the sliding groove 260, the movable frame 230 is movably connected with the inner wall of the transmission case 200, and the upper end of the first threaded post 220 is fixedly connected with the rotating wheel 221.

According to some embodiments of the present application, the first limiting groove 311 is formed in the inner center of the first limiting wheel 310, the outer side of the first limiting wheel 310 is an arc-shaped curved surface, a plurality of second limiting grooves 312 are formed in the arc-shaped curved surface, the center of the rear end of the first limiting wheel 310 is provided with a threaded hole 313, a limiting piece 370 is movably sleeved in the second limiting groove 312, and a moving piece 380 is movably sleeved in the first limiting groove 311.

According to some embodiments of the present application, the limiting member 370 includes a fourth connecting column 371 extending into the first limiting groove 311, a limiting hemisphere 372 disposed in the first limiting groove 311 and connected to the fourth connecting column 371, a fifth connecting column 373 disposed at the other end of the fourth connecting column 371, and a limiting plate 375 disposed at the other end of the fifth connecting column 373 away from one end of the fourth connecting column 371, wherein a spring 374 is movably sleeved on the outer side of the fifth connecting column 373, a second anti-slip strip 323 is disposed on the outer side of the limiting plate 375, and the fourth connecting column 371 and the fifth connecting column 373 are movably sleeved in the second limiting groove 312.

According to some embodiments of the present application, the moving member 380 includes a stopper 381 disposed in the first limiting groove 311, a second threaded column 382 connected to the stopper 381, and a rotating groove 383 disposed on a side of the second threaded column 382 away from the stopper 381, where the stopper 381 and the second threaded column 382 are connected through bearings, and the second threaded column 382 is adapted to the threaded hole 313 of the first limiting wheel 310, and the stopper 381 is cone-shaped.

According to some embodiments of the present application, the second limiting wheel 320 includes a wheel body 321 and a fixing sleeve 322 disposed on the outer side of the wheel body 321, the outer side of the fixing sleeve 322 is fixedly connected with a first anti-slip strip 376, and the wheel body 321 is fixedly connected with the third transmission post 210.

According to some embodiments of the application, a straightening method of a straightening device special for cold rolled ribbed steel bars comprises the following specific steps:

step one: according to the bending degree and the outer diameter of the cold-rolled ribbed steel bar, the distance between the first limiting wheel 310 and the second limiting wheel 320 is adjusted, the rotating wheel 221 at the left end of the rotating device drives the first threaded column 220 to rotate, so that the first threaded column 220 vertically moves to push the movable frame 230 to descend, the fourth transmission column 240 drives the first limiting wheel 310 to descend in the sliding groove 260, the second face gear 241 slides and descends on the outer surface of the post gear 132, and the distance between the first anti-slip strip 376 at the left end of the device and the limiting piece 370 is changed;

step two: according to the distance between the first anti-slip strip 376 at the left end of the device and the limiting member 370, the first threaded column 220 at the right end of the device is rotated, so that the distance between the first anti-slip strip 376 at the right end and the limiting member 370 is slightly smaller than the distance between the first anti-slip strip 376 at the left end and the limiting member 370;

step three: starting a motor 400 to drive the first transmission column 110 to rotate, wherein the first transmission column 110 drives the first bevel gear 120 to rotate, the first bevel gear 120 drives the second bevel gear 131 to rotate, so as to drive the column gear 132 at the upper end of the second transmission column 130 to rotate, the column gear 132 drives the first end face gear 211 and the second end face gear 241 to rotate, the first end face gear 211 drives the third transmission column 210 and the second limiting wheel 320 to rotate, and the second end face gear 241 drives the fourth transmission column 240 and the first limiting wheel 310 to rotate, so that the two first limiting wheels 310 and the two second limiting wheels 320 both rotate;

step four: putting a straight end of a bent cold-rolled ribbed steel bar into the feeding hole 340, enabling the cold-rolled ribbed steel bar to enter the conveying pipe 360 under the driving of the rotation of a first anti-slip strip 376 at the left end of the device and a second anti-slip strip 323 on the limiting piece 370, enabling the cold-rolled ribbed steel bar to enter the conveying pipe 360 and enter the first anti-slip strip 376 at the right end of the device and the second anti-slip strip 323 on the limiting piece 370 to be driven to rotate, finishing one-time rolling and straightening, and repeating the operation once;

step five: after stopping; turning the first threaded post 220 at the left end of the device again, reducing the distance between the first anti-slip strip 376 at the left end of the device and the stop 370, and repeating steps two to four;

step six: if the first limiting wheel 310 and the second limiting wheel 320 reach the shortest distance, the second threaded column 382 is rotated by the rotating groove 383 at the left end of the device to drive the limiting block 381 to move towards the front end, and due to the design of the shape of the limiting block 381, the limiting block 381 can push the limiting hemisphere 372, so that the fourth connecting column 371 and the fifth connecting column 373 push out the limiting plate 375 and the second anti-slip strip 323 outwards, and the distance between the limiting plate 375 and the second anti-slip strip 323 at the left end of the device and the first anti-slip strip 376 is reduced;

step seven: the second threaded column 382 is rotated by the rotating groove 383 at the right end of the device, so that the distance between the limiting piece 375 at the right end of the device and the second anti-slip strip 323 and the first anti-slip strip 376 is slightly smaller than the distance between the limiting piece 375 at the left end of the device and the second anti-slip strip 323 and the first anti-slip strip 376;

In summary, the invention relates to the technical field of straightening devices, and discloses a straightening device special for cold rolled ribbed steel bars and a straightening method thereof, wherein the straightening device comprises the following steps: the automatic straightening device comprises a base and a transmission case, wherein a straightening mechanism is arranged on the outer side of the transmission case, a motor is fixedly arranged on one side of the base, the output end of the motor extends into the base and is connected with a first transmission column, the other end of the first transmission column is rotationally connected with the inner wall of the base, two first bevel gears are fixedly sleeved on the outer surface of the first transmission column, the lower end of the transmission case is connected with a second transmission column through a bearing, the lower end of the second transmission column is fixedly connected with a second bevel gear, the upper end of the second transmission column is fixedly connected with a column gear, the lower end of the rear side of the transmission case is connected with a third transmission column through a bearing, the upper end of the transmission case is in threaded connection with a first threaded column, the lower end of the first threaded column is connected with a movable frame through a bearing, the front end and the rear end of the lower side of the movable frame are connected with a fourth transmission column through a bearing, the second end face gear is arranged on the fourth transmission column, and the reinforcing steel bars are gradually straightened for a plurality of times through the straightening mechanism, so that the device is small in size and can also achieve a correction effect.

The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.

Claims

1. A straightening device special for cold-rolled ribbed steel bars comprises: the base (100) and a plurality of transmission boxes (200) arranged at the top of the base (100), the novel electric motor is characterized in that a straightening mechanism (300) is arranged at the outer side of each transmission box (200), a motor (400) is fixedly arranged at one side of each base (100), an output end of each motor (400) extends into each base (100) and is connected with a first transmission column (110), the other end of each first transmission column (110) is rotationally connected with the inner wall of each base (100), two first bevel gears (120) are fixedly connected with an outer surface fixing sleeve (322) of each first transmission column (110), the lower end of each transmission box (200) is connected with a second transmission column (130) through a bearing, a second bevel gear (131) is fixedly connected with the lower end of each second transmission column (130), a third transmission column (210) is connected with the lower end of the rear side of each transmission box (200) through a bearing, two first transmission columns (220) are fixedly connected with the upper ends of the transmission columns (200) through bearings, the lower ends of the transmission columns (230) are connected with the upper ends of the transmission columns (230), the fourth transmission column (240) is provided with a second face gear (241), the first face gear (211) and the second face gear (241) are arranged on two sides of the column gear (132), and the outer sides of the third transmission column (210) and the fourth transmission column (240) are respectively connected with the straightening mechanism (300).

2. The straightening device special for cold rolled ribbed steel bars according to claim 1, characterized in that the straightening mechanism (300) comprises a first limiting wheel (310) connected to the outer end of a fourth transmission column (240), a second limiting wheel (320) connected to the outer end of a third transmission column (210), a first connecting column (330) arranged at the top of the base (100) and at the front side of the first limiting wheel (310), and a second connecting column (350) arranged between adjacent second limiting wheels (320), wherein a feed inlet (340) is arranged at the top of the first connecting column (330), a feed conveying pipe (360) is transversely arranged at the top of the second connecting column (350), and the feed inlet (340) is funnel-shaped.

3. The straightening device special for cold rolled ribbed steel bars according to claim 1, characterized in that the first bevel gear (120) and the second bevel gear (131) are engaged with each other, and the second driving post (130) is connected with the top plate of the base (100) through a bearing.

4. The straightening device special for cold-rolled ribbed steel bars according to claim 2, characterized in that a third connecting column (250) is fixedly connected to the lower end of the front end of the inner cavity of the transmission case (200), and the third connecting column (250) is connected with the outer surface of the second connecting column (350) through a bearing.

5. The straightening device special for cold-rolled ribbed steel bars according to claim 1, characterized in that the column gear (132) is respectively meshed with the first end face gear (211) and the second end face gear (241), a sliding groove (260) is vertically formed in the upper end of the front side of the transmission case (200), the fourth transmission column (240) is movably sleeved in the sliding groove (260), the movable frame (230) is movably connected with the inner wall of the transmission case (200), and the upper end of the first threaded column (220) is fixedly connected with a rotating wheel (221).

6. The straightening device special for cold-rolled ribbed bars according to claim 2, characterized in that a first limiting groove (311) is formed in the inner center of the first limiting wheel (310), the outer side of the first limiting wheel (310) is an arc-shaped curved surface, a plurality of second limiting grooves (312) are formed in the arc-shaped curved surface, a threaded hole (313) is formed in the center of the rear end of the first limiting wheel (310), a limiting piece (370) is movably sleeved in the second limiting groove (312), and a moving piece (380) is movably sleeved in the first limiting groove (311).

7. The straightening device special for cold-rolled rib steel bars according to claim 6, characterized in that the limiting piece (370) comprises a fourth connecting column (371) extending into the first limiting groove (311), a limiting hemisphere (372) arranged in the first limiting groove (311) and connected with the fourth connecting column (371), a fifth connecting column (373) arranged at the other end of the fourth connecting column (371), and a limiting plate (375) arranged at one end, far away from the fourth connecting column (371), of the fifth connecting column (373), a spring (374) is movably sleeved on the outer side of the fifth connecting column (373), a second anti-slip strip (323) is arranged on the outer side of the limiting plate (375), and the fourth connecting column (371) and the fifth connecting column (373) are movably sleeved in the second limiting groove (312).

8. The straightening device special for cold-rolled ribbed steel bars according to claim 6, characterized in that the moving part (380) comprises a limiting block (381) arranged in a first limiting groove (311), a second threaded column (382) connected to the limiting block (381), and a rotating groove (383) arranged on one side, far away from the limiting block (381), of the second threaded column (382), the limiting block (381) is connected with the second threaded column (382) through a bearing, the second threaded column (382) is matched with a threaded hole (313) of the first limiting wheel (310), and the limiting block (381) is conical.

9. The straightening device special for cold-rolled ribbed steel bars according to claim 2, characterized in that the second limiting wheel (320) comprises a wheel body (321) and a fixed sleeve (322) arranged on the outer side of the wheel body (321), a first anti-slip strip (376) is fixedly connected on the outer side of the fixed sleeve (322), and the wheel body (321) is fixedly connected with a third transmission column (210).

10. A straightening method applied to the straightening device special for cold rolled ribbed steel bars as claimed in any one of claims 1 to 9, characterized by comprising the following specific steps:

step one: according to the bending degree and the outer diameter of the cold-rolled ribbed steel bar, the distance between the first limiting wheel (310) and the second limiting wheel (320) is adjusted, the rotating wheel (221) at the left end of the rotating device drives the first threaded column (220) to rotate, the first threaded column (220) vertically moves to push the moving frame (230) to descend, the fourth transmission column (240) drives the first limiting wheel (310) to descend in the sliding groove (260), the second face gear (241) slides and descends on the outer surface of the column gear (132), and the distance between the first anti-skid strip (376) at the left end of the device and the limiting piece (370) is changed;

step two: according to the distance between the first anti-slip strip (376) at the left end of the device and the limiting piece (370), the first threaded column (220) at the right end of the device is rotated, so that the distance between the first anti-slip strip (376) at the right end and the limiting piece (370) is slightly smaller than the distance between the first anti-slip strip (376) at the left end and the limiting piece (370);

step three: starting a motor (400) to drive a first transmission column (110) to rotate, wherein the first transmission column (110) drives a first bevel gear (120) to rotate, the first bevel gear (120) drives a second bevel gear (131) to rotate, thereby driving a column gear (132) at the upper end of a second transmission column (130) to rotate, the column gear (132) drives a first end face gear (211) and a second end face gear (241) to rotate, the first end face gear (211) drives a third transmission column (210) and a second limit wheel (320) to rotate, and the second end face gear (241) drives a fourth transmission column (240) and the first limit wheel (310) to rotate, so that both the two first limit wheels (310) and the two second limit wheels (320) rotate;

step four: putting one straight end of a bent cold-rolled ribbed steel bar into the feeding hole (340), enabling the cold-rolled ribbed steel bar to enter the conveying pipe (360) under the driving of rotation of a first anti-slip strip (376) at the left end of the device and a second anti-slip strip (323) on a limiting piece (370), enabling the cold-rolled ribbed steel bar to enter the conveying pipe (360) and then enter the first anti-slip strip (376) at the right end of the device and be driven by rotation of the second anti-slip strip (323) on the limiting piece (370) and then finish rolling and straightening once, and repeating the operation once;

step five: after stopping; turning the first threaded post (220) at the left end of the device again, reducing the distance between the first anti-slip strip (376) at the left end of the device and the limiting member (370), and repeating the second to fourth steps;

step six: if the shortest distance between the first limiting wheel (310) and the second limiting wheel (320) is reached, the second threaded column (382) is rotated through the rotating groove (383) at the left end of the device to drive the limiting block (381) to move towards the front end, and due to the design of the shape of the limiting block (381), the limiting block (381) can push the limiting hemisphere (372) to enable the fourth connecting column (371) and the fifth connecting column (373) to eject the limiting sheet (375) and the second anti-slip strip (323) outwards, so that the distance between the limiting sheet (375) at the left end of the device and the second anti-slip strip (323) and the first anti-slip strip (376) is reduced;

step seven: the second threaded column (382) is rotated through the rotating groove (383) at the right end of the device, so that the distance between the limiting plate (375) at the right end of the device and the second anti-slip strip (323) and the first anti-slip strip (376) is slightly smaller than the distance between the limiting plate (375) at the left end of the device and the second anti-slip strip (323) and the first anti-slip strip (376);