A special straightening device for cold-rolled ribbed steel bars and a straightening method thereof

Abstract

The present application relates to the technical field of straightening device, and discloses a special straightening device for cold-rolled rib steel bars and a straightening method thereof, which comprises a base and a transmission box, a straightening mechanism is arranged on the transmission box, a motor is installed 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 box 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 box is connected with a third transmission column through a bearing, the third transmission column is connected with a first face gear, the upper end of the transmission box is threadedly connected with a first threaded column, the lower end of the first threaded column is connected with a moving frame through a bearing, the lower side of the moving frame is connected with a fourth transmission column through bearings arranged at the front and rear ends, and the fourth transmission column is provided with a second face gear.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of straightening device, in particular to a cold-rolled ribbed bar special straightening device and a straightening method thereof. BACKGROUND

[0002] The cold-rolled ribbed bar is a kind of steel bar with three or two lateral ribs uniformly distributed along the length direction on the surface of the hot-rolled round bar after cold rolling, which is mainly used in building construction.

[0003] In the prior art, the small-diameter cold-rolled ribbed bars are basically bent and wound into bundles after being produced and leaving the factory. When needed, the cold-rolled ribbed bars are straightened by using a cold-rolled ribbed bar straightening device in the factory, and then cut into the required length, and then bent and spliced according to the building needs. When the defective products generated in the bending process need to be recycled, they need to be straightened again. The existing cold-rolled ribbed bar straightening device is generally large in size, and is easily affected by the site when used on the construction site, which brings many inconveniences. In view of the above problems, a cold-rolled ribbed bar special straightening device and a straightening method thereof are needed, and thus the present application is born. SUMMARY

[0004] The present application provides a cold-rolled ribbed bar special straightening device and a straightening method thereof to solve the problems in the background art.

[0005] To solve the above technical problems, the present application provides a cold-rolled ribbed bar special straightening device, which comprises a base and a plurality of transmission boxes arranged on the top of the base. The outer side of the transmission box is provided with a straightening mechanism. One side of the base is fixedly installed with a motor. 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. The outer surface of the first transmission column is fixedly sleeved with two first bevel gears. The lower end of the transmission box 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 box is connected with a third transmission column through a bearing. The third transmission column is fixedly connected with a first face gear. The upper end of the transmission box is threadedly connected with a first threaded column. The lower end of the first threaded column is connected with a moving frame through a bearing. The lower side of the moving frame is connected with a fourth transmission column through a bearing. The fourth transmission column is provided with a second face gear. The first face gear and the second face gear are arranged on the two sides of the column gear. The outer sides of the third transmission column and the fourth transmission column are connected with the straightening mechanism.

[0006] In some embodiments of the present application, the straightening mechanism comprises a first limiting wheel connected to the outer end of the fourth transmission column, a second limiting wheel connected to the outer end of the third transmission column, a first connecting column arranged on the top of the base and in front of the first limiting wheel, and a second connecting column arranged between adjacent second limiting wheels, the top of the first connecting column is provided with a feeding port, the top of the second connecting column is transversely provided with a feeding pipe, and the feeding port is funnel-shaped.

[0007] In some embodiments of the present application, the first bevel gear and the second bevel gear are engaged with each other, and the second transmission column is connected to the top plate of the base through a bearing.

[0008] In some embodiments of the present application, the lower end of the front end of the transmission box cavity is fixedly connected with a third connecting column, and the third connecting column is connected to the outer surface of the second connecting column through a bearing.

[0009] In some embodiments of the present application, the column gears are respectively engaged with the first face gear and the second face gear, the upper end of the front side of the transmission box is vertically provided with a sliding groove, the fourth transmission column is movably sleeved in the sliding groove, the moving frame is movably connected to the inner wall of the transmission box, and the upper end of the first threaded column is fixedly connected with a rotating wheel.

[0010] In some embodiments of the present application, a first limiting groove is arranged in the center of the first limiting wheel, the outer side of the first limiting wheel is an arc-shaped curved surface, a plurality of second limiting grooves are arranged on the arc-shaped curved surface, a threaded hole is arranged in the center of the rear end of the first limiting wheel, a limiting piece is movably sleeved in the second limiting groove, and a moving piece is movably sleeved in the first limiting groove.

[0011] In some embodiments of the present application, the limiting piece comprises a fourth connecting column extending into the first limiting groove, a limiting hemisphere arranged in the first limiting groove and connected to the fourth connecting column, a fifth connecting column arranged at the other end of the fourth connecting column, and a limiting piece arranged at the end of the fifth connecting column away from the fourth connecting column, a spring is movably sleeved on the outer side of the fifth connecting column, a second anti-skid strip is arranged on the outer side of the limiting piece, and the fourth connecting column and the fifth connecting column are movably sleeved in the second limiting groove.

[0012] In some embodiments of the present application, the moving piece comprises a limiting block arranged in the first limiting groove, a second threaded column connected to the limiting block, and a rotating groove arranged at the side of the second threaded column away from the limiting block, the limiting block and the second threaded column are connected through a bearing, the second threaded column is matched with the threaded hole of the first limiting wheel, and the limiting block is conical.

[0013] In some embodiments of the present application, the second limiting wheel comprises a wheel body and a fixing sleeve arranged outside the wheel body, the outer side of the fixing sleeve is fixedly connected with a first anti-skid strip, and the wheel body is fixedly connected with a third transmission column.

[0014] In some embodiments of the present application, a straightening method of a straightening device special for cold-rolled ribbed steel bars is provided, and specific steps of the straightening method are as follows.

[0015] Step one: according to the bending degree and 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 device is rotated to rotate the first threaded column, the first threaded column is vertically moved to push the moving frame to descend, the fourth transmission 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-skid strip at the left end of the device and the limiting piece is changed;

[0016] Step two: according to the distance between the first anti-skid 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-skid strip at the right end of the device and the limiting piece is slightly smaller than the distance between the first anti-skid strip at the left end of the device and the limiting piece;

[0017] Step three: the motor is started to drive the first transmission column to rotate, the first transmission column drives the first bevel gear to rotate, the first bevel gear drives the second bevel gear to rotate, thereby driving the column gear at the upper end of the second transmission column to rotate, the column gear drives the first end face gear and the second end face gear to rotate, the first end face gear drives the third transmission column and the second limiting wheel to rotate, the second end face gear drives the fourth transmission column and the first limiting wheel to rotate, so that both the two first limiting wheels and the two second limiting wheels rotate;

[0018] Step four: the straightened end of the bent cold-rolled ribbed steel bar is put into the feeding port, the cold-rolled ribbed steel bar is driven by the first anti-skid strip at the left end of the device cooperating with the second anti-skid strip on the limiting piece to rotate, enters the feeding pipe, and then is driven by the first anti-skid strip at the right end of the device cooperating with the second anti-skid strip on the limiting piece to rotate and come out of the feeding pipe, to complete one-time rolling straightening, and the above operation is repeated once;

[0019] Step five: after stopping, the first threaded column at the left end of the device is rotated again to reduce the distance between the first anti-skid strip at the left end of the device and the limiting piece, and the steps two to four are repeated;

[0020] Step six: if the distance between the first limiting wheel and the second limiting wheel reaches the shortest distance, 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, due to the design of the shape of the limiting block, the limiting block will push the limiting hemisphere, so that the fourth connecting column and the fifth connecting column push the limiting piece and the second anti-skid strip outward, so that the distance between the limiting piece and the second anti-skid strip at the left end of the device and the first anti-skid strip becomes smaller;

[0021] Step seven: rotate the second threaded column through the rotating groove at the right end of the device, so that the distance between the limiting sheet and the second anti-skid strip at the right end of the device and the first anti-skid strip is slightly smaller than the distance between the limiting sheet and the second anti-skid strip at the left end of the device and the first anti-skid strip;

[0022] Step eight: repeat steps three and four, and by analogy, straighten the cold-rolled ribbed steel bar.

[0023] Compared with the prior art, the present application has the following characteristics and beneficial effects:

[0024] The present application achieves a small device volume by the motor, the column gear, the third transmission column, the material conveying pipe and the like, drives the first bevel gear through the motor, drives the second bevel gear to rotate, then reduces the driving structure through the meshing mode of the column gear, the first end face gear and the third transmission column, simultaneously drives the rotation of the two first limiting wheels and the two second limiting wheels, and the cooperation between the left end first limiting wheel and the second limiting wheel and the right end first limiting wheel and the second limiting wheel, and the action of the material conveying pipe and the feed inlet, gradually and repeatedly straightens the steel bar, so that the device with small volume can also achieve the correction effect.

[0025] The present application has good anti-skid effect through the first anti-skid strip, and the first limiting wheel is lowered by rotating the first threaded column, the first threaded column pushes down the moving frame, the fourth transmission column drives the first limiting wheel to descend in the sliding groove, the first limiting wheel upper limiting piece and the second limiting wheel act on the steel bar together, so that the first anti-skid strip cooperates with the second anti-skid strip on the first limiting wheel to act on the horizontal ribs outside the steel bar, thereby preventing the steel bar from slipping during the rolling process. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a whole structure schematic diagram of the embodiment of the present application;

[0027] Figure 2 is a base sectional view schematic diagram of the embodiment of the present application;

[0028] Figure 3 is a transmission case external structure schematic diagram of the embodiment of the present application;

[0029] Figure 4 is a transmission case internal structure schematic diagram of the embodiment of the present application;

[0030] Figure 5 is a first limiting wheel sectional view schematic diagram of the embodiment of the present application;

[0031] Figure 6 is a first limiting wheel and moving piece exploded view schematic diagram of the embodiment of the present application;

[0032] Figure 7 is a limiting piece structure schematic diagram of the embodiment of the present application;

[0033] Figure 8 is a second limiting wheel exploded schematic view of an embodiment of the present application.

[0034] In the figure, 100, base; 110, first transmission column; 120, first bevel gear; 130, second transmission column; 131, second bevel gear; 132, column gear; 200, transmission box; 210, third transmission column; 211, first face gear; 220, first threaded column; 221, runner; 230, moving frame; 240, fourth transmission column; 241, second face gear; 250, third connecting column; 260, sliding groove; 300, straightening mechanism; 310, first limiting wheel; 311, first limiting groove; 312, second limiting groove; 313, threaded hole; 320, second limiting wheel; 321, wheel body; 322, fixing sleeve; 323, first anti-skid strip; 330, first connecting column; 340, feeding port; 350, second connecting column; 360, material conveying pipe; 370, limiting piece; 371, fourth connecting column; 372, limiting hemisphere; 373, fifth connecting column; 374, spring; 375, limiting piece; 376, second anti-skid strip; 380, moving piece; 381, limiting block; 382, second threaded column; 383, rotating groove; 400, motor. DETAILED DESCRIPTION

[0035] The specific embodiments of the present application will be further described in conjunction with the drawings and examples. The following examples are used to illustrate the present application, but are not used to limit the scope of the present application.

[0036] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0037] The terms "first", "second" are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise stated, the meaning of "multiple" is two or more.

[0038] In the description of the present application, it should be noted that unless specifically defined and limited otherwise, the terms "mounting", "connected", "connection" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] As shown in Figures 1-8 According to some embodiments of the present application, a straightening device special for cold-rolled rib steel bars comprises a base 100 and a plurality of transmission boxes 200 arranged on the top of the base 100, a straightening mechanism 300 arranged on the outer side of the transmission box 200, a motor 400 fixedly installed on one side of the base 100, a first transmission column 110 connected to the output end of the motor 400 extending into the base 100, the other end of the first transmission column 110 rotatably connected to the inner wall of the base 100, two first bevel gears 120 fixedly sleeved on the outer surface of the first transmission column 110, a second transmission column 130 connected to the lower end of the transmission box 200 through a bearing, a second bevel gear 131 fixedly connected to the lower end of the second transmission column 130, a column gear 132 fixedly connected to the upper end of the second transmission column 130, a third transmission column 210 connected to the lower end of the rear side of the transmission box 200 through a bearing, a first face gear 211 fixedly connected to the third transmission column 210, a first threaded column 220 threadedly connected to the upper end of the transmission box 200, a moving frame 230 connected to the lower end of the first threaded column 220 through a bearing, a fourth transmission column 240 connected to the front and rear ends of the lower side of the moving frame 230 through a bearing, a second face gear 241 arranged on the fourth transmission column 240, the first face gear 211 and the second face gear 241 arranged on the two sides of the column gear 132, and the outer sides of the third transmission column 210 and the fourth transmission column 240 connected to the straightening mechanism 300.

[0040] According to some embodiments of the present application, the straightening mechanism 300 comprises a first limiting wheel 310 connected to the outer end of the fourth transmission column 240, a second limiting wheel 320 connected to the outer end of the third transmission column 210, a first connecting column 330 arranged on the top of the base 100 and the front side of the first limiting wheel 310, and a second connecting column 350 arranged between adjacent second limiting wheels 320, a feeding port 340 arranged on the top of the first connecting column 330, a feeding pipe 360 transversely arranged on the top of the second connecting column 350, and the feeding port 340 in the shape of a funnel.

[0041] 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 transmission column 130 is connected to the top plate of the base 100 through a bearing.

[0042] According to some embodiments of the present application, the lower end of the front end of the inner cavity of the transmission box 200 is fixedly connected with a third connecting column 250, and the third connecting column 250 is connected with the outer surface of the second connecting column 350 through a bearing.

[0043] According to some embodiments of the present application, the column gears 132 are respectively engaged with the first end face gear 211 and the second end face gear 241, the upper end of the front side of the transmission box 200 is vertically provided with a sliding groove 260, the fourth transmission column 240 is movably sleeved in the sliding groove 260, the moving frame 230 is movably connected with the inner wall of the transmission box 200, and the upper end of the first threaded column 220 is fixedly connected with a rotating wheel 221.

[0044] According to some embodiments of the present application, the first limiting wheel 310 is internally provided with a first limiting groove 311, the outer side of the first limiting wheel 310 is an arc-shaped curved surface, a plurality of second limiting grooves 312 are formed on the arc-shaped curved surface, the rear end of the first limiting wheel 310 is centrally 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.

[0045] According to some embodiments of the present application, 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 to the fourth connecting column 371, a fifth connecting column 373 arranged at the other end of the fourth connecting column 371, and a limiting piece 375 arranged at the end of the fifth connecting column 373 away from the fourth connecting column 371, a spring 374 movably sleeved on the outer side of the fifth connecting column 373, a second anti-skid strip 376 arranged on the outer side of the limiting piece 375, and the fourth connecting column 371 and the fifth connecting column 373 movably sleeved in the second limiting groove 312.

[0046] According to some embodiments of the present application, the moving piece 380 comprises a limiting block 381 arranged in the first limiting groove 311, a second threaded column 382 connected to the limiting block 381, and a rotating groove 383 arranged at the side of the second threaded column 382 away from the limiting block 381, the limiting block 381 and the second threaded column 382 are connected through a bearing, the second threaded column 382 is matched with the threaded hole 313 of the first limiting wheel 310, and the limiting block 381 is conical.

[0047] According to some embodiments of the present application, 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, the outer side of the fixed sleeve 322 is fixedly connected with a first anti-skid strip 323, and the wheel body 321 is fixedly connected with the third transmission column 210.

[0048] According to some embodiments of the present application, a straightening method of a straightening device special for cold-rolled ribbed steel bars is provided, and the specific steps of the straightening method are as follows:

[0049] Step one: according to the degree of bending and the outer diameter of the cold-rolled rib steel, adjust the distance between the first limiting wheel 310 and the second limiting wheel 320, rotate the rotating wheel 221 at the left end of the device to drive the first threaded column 220 to rotate, make the first threaded column 220 move vertically, 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 end face gear 241 slides down the outer surface of the column gear 132, change the distance between the first anti-skid strip 323 at the left end of the device and the limiting piece 370;

[0050] Step two: according to the distance between the first anti-skid strip 323 at the right end of the device and the limiting piece 370, rotate the first threaded column 220 at the right end of the device, so that the distance between the first anti-skid strip 323 at the right end of the device and the limiting piece 370 is slightly smaller than the distance between the first anti-skid strip 323 at the left end of the device and the limiting piece 370;

[0051] Step three: start the motor 400, drive the first transmission column 110 to rotate, 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, thereby driving 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, 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 are rotated;

[0052] Step four: put the straight end of the bent cold-rolled rib steel into the feeding port 340, the cold-rolled rib steel is driven by the first anti-skid strip 323 at the left end of the device cooperating with the second anti-skid strip 376 on the limiting piece 370, enters the feeding pipe 360, and then is driven by the first anti-skid strip 323 at the right end of the device cooperating with the second anti-skid strip 376 on the limiting piece 370, and is driven out of the feeding pipe 360, completing a rolling straightening, and repeating the above operation once;

[0053] Step five: after stopping, rotate the first threaded column 220 at the left end of the device again, reduce the distance between the first anti-skid strip 323 at the left end of the device and the limiting piece 370, and repeat steps two to four;

[0054] Step six: if the shortest distance is reached between the first limiting wheel 310 and the second limiting wheel 320, the second threaded column 382 is rotated through the rotating groove 383 at the left end of the device, and the limiting block 381 is moved towards the front end, and due to the design of the shape of the limiting block 381, the limiting block 381 will push the limiting hemisphere 372, so that the fourth connecting column 371 and the fifth connecting column 373 will push the limiting sheet 375 and the second anti-skid strip 376 outwards, and the distance between the limiting sheet 375 and the second anti-skid strip 376 at the left end of the device and the first anti-skid strip 323 becomes smaller;

[0055] 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 sheet 375 and the second anti-skid strip 376 at the right end of the device and the first anti-skid strip 323 is slightly smaller than the distance between the limiting sheet 375 and the second anti-skid strip 376 at the left end of the device and the first anti-skid strip 323.

[0056] Step eight: steps three and four are repeated, and by analogy, the cold-rolled ribbed steel bar is straightened.

[0057] To sum up, the present application relates to the technical field of straightening devices, and discloses a cold-rolled ribbed steel bar special straightening device and a straightening method thereof, which comprises a base and a transmission box, a straightening mechanism is arranged on the outer side of the transmission box, a motor is fixedly installed 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, a second transmission column is connected with a bearing at the lower end of the transmission box, a second bevel gear is fixedly connected with the lower end of the second transmission column, a column gear is fixedly connected with the upper end of the second transmission column, a third transmission column is connected with a bearing at the lower end of the rear side of the transmission box, a first face gear is fixedly connected with the third transmission column, a first threaded column is threadedly connected with the upper end of the transmission box, a moving frame is connected with a bearing at the lower end of the first threaded column, a fourth transmission column is connected with a bearing at the front and rear ends of the lower side of the moving frame, and a second face gear is arranged on the fourth transmission column, so that the steel bar is straightened gradually and repeatedly through the straightening mechanism, thereby realizing the correction effect with a small device.

[0058] The above only describes the preferred embodiments of the present application, and it should be noted that, for ordinary skilled persons in the technical field, some improvements and replacements can be made without departing from the technical principles of the present application, and these improvements and replacements should also be regarded as the protection scope of the present application.

Claims

1. A special straightening device for cold-rolled ribbed steel bars, comprising: The base (100) and a plurality of transmission boxes (200) disposed on the top of the base (100) are characterized in that a straightening mechanism (300) is provided on the outer side of the transmission box (200), a motor (400) is fixedly installed on one side of the base (100), the output end of the motor (400) extends into the base (100) and is connected to a first transmission column (110), the other end of the first transmission column (110) is rotatably connected to the inner wall of the base (100), two first bevel gears (120) are fixedly sleeved on the outer surface of the first transmission column (110), and a second transmission column (130) is connected to the lower end of the transmission box (200) through a bearing, and a second transmission column (130) is fixedly connected to the lower end of the second transmission column (130). A bevel gear (131) is fixedly connected to the upper end of the second transmission column (130), a spur gear (132) is fixedly connected to the upper end of the transmission box (200), a third transmission column (210) is connected to the lower end of the rear side of the transmission box (200) via a bearing, a first end face gear (211) is fixedly connected to the third transmission column (210), a first threaded column (220) is threadedly connected to the upper end of the transmission box (200), a movable frame (230) is connected to the lower end of the first threaded column (220) via a bearing, a fourth transmission column (240) is connected to the lower front and rear ends of the movable frame (230) via bearings, a second end face gear (241) is provided on the fourth transmission column (240), and the first end face gear (211) and the second end face gear (241) are connected to each other. Located on both sides of the spur gear (132), the outer sides of the third transmission column (210) and the fourth transmission column (240) are respectively connected to the straightening mechanism (300). The straightening mechanism (300) includes a first limiting wheel (310) connected to the outer end of the fourth transmission column (240), a second limiting wheel (320) connected to the outer end of the third transmission column (210), a first connecting column (330) located on the top of the base (100) and in front of the first limiting wheel (310), and a second connecting column (350) located between adjacent second limiting wheels (320). The top of the first connecting column (330) is provided with a feed inlet (340), and the top of the second connecting column (350) is provided with a conveying pipe (360) arranged laterally. The feed inlet (340) is funnel-shaped. A first limiting groove (311) is provided in the center of the first limiting wheel (310). The outer side of the first limiting wheel (310) is an arc-shaped surface. A plurality of second limiting grooves (312) are provided on the arc-shaped surface. A threaded hole (313) is provided in the center of the rear end of the first limiting wheel (310). A limiting component (370) is movably sleeved in the second limiting groove (312). A moving component (380) is movably sleeved in the first limiting groove (311). The limiting component (370) includes a fourth connecting post (371) extending into the first limiting groove (311) and a limiting hemisphere (372) disposed in the first limiting groove (311) and connected to the fourth connecting post (371).A fifth connecting post (373) is located at the other end of the fourth connecting post (371), and a limiting piece (375) is located at the end of the fifth connecting post (373) away from the fourth connecting post (371). A spring (374) is movably sleeved on the outer side of the fifth connecting post (373), and a second anti-slip strip (376) is provided on the outer side of the limiting piece (375). The fourth connecting post (371) and the fifth connecting post (373) are movably sleeved in the second limiting groove (312). The moving part ( 380) includes a limiting block (381) disposed within a first limiting groove (311), a second threaded post (382) connected to the limiting block (381), and a rotating groove (383) disposed on the side of the second threaded post (382) away from the limiting block (381). The limiting block (381) and the second threaded post (382) are connected by a bearing. The second threaded post (382) is adapted to the threaded hole (313) of the first limiting wheel (310). The limiting block (381) is conical.

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

3. The special straightening device for cold-rolled ribbed steel bars according to claim 1, characterized in that, The lower end of the front end of the inner cavity of the transmission box (200) is fixedly connected to a third connecting column (250), and the third connecting column (250) is connected to the outer surface of the third transmission column (210) through a bearing.

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

5. A special straightening device for cold-rolled ribbed steel bars according to claim 1, characterized in that, The second limiting wheel (320) includes a wheel body (321) and a fixing sleeve (322) disposed on the outside of the wheel body (321). A first anti-slip strip (323) is fixedly connected to the outside of the fixing sleeve (322), and the wheel body (321) is fixedly connected to the third transmission column (210).

6. A straightening method for use with the special straightening device for cold-rolled ribbed steel bars as described in any one of claims 1-5, characterized in that, The specific steps of the straightening method are as follows: Step 1: Adjust the distance between the first limiting wheel (310) and the second limiting wheel (320) according to the degree of bending and outer diameter of the cold-rolled ribbed steel bar. 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) moves vertically and pushes the moving frame (230) down. The fourth transmission column (240) drives the first limiting wheel (310) to descend in the sliding groove (260). The second end face gear (241) slides down on the outer surface of the column gear (132), changing the distance between the first anti-slip strip (323) and the limiting member (370) at the left end of the device. Step 2: Based on the distance between the first anti-slip strip (323) on the left end of the device and the limiting member (370), rotate the first threaded post (220) on the right end of the device so that the distance between the first anti-slip strip (323) on the right end and the limiting member (370) is slightly smaller than the distance between the first anti-slip strip (323) on the left end and the limiting member (370). Step 3: Start the motor (400), which drives the first transmission column (110) to rotate. 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, thereby driving the spur gear (132) at the upper end of the second transmission column (130) to rotate. The spur 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 limit wheel (320) to rotate. The second end face gear (241) drives the fourth transmission column (240) and the first limit wheel (310) to rotate, thereby causing both first limit wheels (310) and both second limit wheels (320) to rotate. Step 4: Insert the straighter end of the bent cold-rolled ribbed steel bar into the feed port (340). The cold-rolled ribbed steel bar enters the conveying pipe (360) under the rotation of the first anti-slip strip (323) on the left end of the device and the second anti-slip strip (376) on the limiting member (370). Then, it enters the first anti-slip strip (323) on the right end of the device and the second anti-slip strip (376) on the limiting member (370) rotates and comes out, completing one rolling straightening operation. Repeat the above operation once. Step 5: After stopping the machine; rotate the first threaded post (220) on the left end of the device again to reduce the distance between the first anti-slip strip (323) on the left end of the device and the limiting member (370), and repeat steps 2 to 4. Step 6: If the first limiting wheel (310) and the second limiting wheel (320) reach the shortest distance, the second threaded column (382) is rotated through the rotating groove (383) at the left end of the device, which drives the limiting block (381) to move towards the front end. Due to the design of the shape of the limiting block (381), the limiting block (381) will push the limiting hemisphere (372), so that the fourth connecting column (371) and the fifth connecting column (373) push the limiting piece (375) and the second anti-slip strip (376) outward, so that the distance between the limiting piece (375) and the second anti-slip strip (376) at the left end of the device and the first anti-slip strip (323) becomes smaller. Step 7: Rotate the second threaded column (382) through the rotating groove (383) at the right end of the device so that the distance between the limiting piece (375) and the second anti-slip strip (376) at the right end of the device and the first anti-slip strip (323) is slightly smaller than the distance between the limiting piece (375) and the second anti-slip strip (376) at the left end of the device and the first anti-slip strip (323). Step 8: Repeat steps 3 and 4, and so on, to straighten the cold-rolled ribbed steel bars.

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