Threaded steel hot rolling intelligent sizing system and defect identification method thereof

Abstract

The invention relates to the technical field of deformed steel bar production, discloses a deformed steel bar hot rolling intelligent sizing system and a defect identification method thereof, and solves the problem that the existing deformed steel bar hot rolling sizing effect is poorer. The deformed steel bar hot rolling intelligent sizing system comprises a base, a sizing mechanism is arranged at the top of the base, and an adjusting mechanism and a heat dissipation mechanism are arranged on the sizing mechanism; the sizing mechanism comprises a bottom frame fixed to the top of the base, two bottom rollers are symmetrically and rotationally connected to the inner side of the bottom frame, two square round rods are symmetrically arranged above the base, the bottom frame is fixedly connected to the outer sides of the two square round rods in a sleeving mode, two side plates are symmetrically and movably connected between the two square round rods in a sleeving mode, and a top frame is fixedly connected between the two side plates. Two top rollers are symmetrically and rotationally connected to the inner side of the top frame; according to the device, the distance between the front and rear groups of side rollers can be conveniently changed, so that the hot rolling sizing effect of the deformed steel bar can be conveniently improved, and the surface defects of the deformed steel bar can be conveniently, automatically and quickly identified by arranging the plurality of high-speed industrial cameras.

Description

Technical Field

[0001] This invention belongs to the field of rebar production technology, specifically a hot-rolled intelligent sizing system for rebar and its defect identification method. Background Technology

[0002] Rebar is a hot-rolled ribbed steel bar with continuous spiral ribs on its surface. It is mainly rolled from low-carbon alloy steel and is the core steel material used for reinforcement in concrete structures in the construction engineering field. It is widely used in the load-bearing structures of buildings, bridges, tunnels, water conservancy facilities and other projects. The diameter accuracy and surface rib regularity of rebar directly determine its bond strength with concrete and its cooperative stress performance, which is crucial to the safety and stability of engineering structures. Therefore, in the hot rolling production process, the dimensional accuracy of rebar must be ensured through sizing process and surface defect detection must be carried out simultaneously to meet the stringent standards of engineering applications.

[0003] Most existing hot-rolling sizing processes for rebar use fixed-gap rolls for unidirectional extrusion sizing, supplemented by manual sampling or offline inspection to detect defects. The fixed roll spacing is difficult to adapt to the thermal expansion and contraction deformation of the steel bars caused by temperature fluctuations during hot rolling, which can easily lead to out-of-tolerance diameters and uneven rib heights, affecting product quality consistency. Offline inspection or manual sampling inspection has a detection lag and cannot identify surface cracks, scratches, missing lines, and other defects generated during production in real time. This can easily allow unqualified products to flow into downstream processes, which not only increases rework costs but also creates potential safety hazards and fails to meet the intelligent and high-precision requirements of modern steel production. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, this invention provides a hot-rolled intelligent sizing system for rebar and its defect identification method, which effectively solves the problem of poor sizing effect of hot-rolled rebar.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a hot-rolled intelligent sizing system for rebar, comprising a base, a sizing mechanism on the top of the base, and an adjustment mechanism and a heat dissipation mechanism on the sizing mechanism; The sizing mechanism includes a base frame fixed to the top of the base. Two bottom rollers are symmetrically rotatably connected to the inner side of the base frame. Two square rods are symmetrically arranged above the base. The base frame is fixedly sleeved on the outer side of the two square rods. Two side plates are symmetrically movably sleeved between the two square rods. A top frame is fixedly connected between the two side plates. Two top rollers are symmetrically rotatably connected to the inner side of the top frame. The two top rollers are located directly above the two bottom rollers. Two movable frames are symmetrically movably sleeved between the two square rods. Two side rollers are symmetrically rotatably connected to the inner side of each movable frame. Side ring one and side ring two are symmetrically arranged above the base. The base frame is located between side ring one and side ring two. Multiple laser diameter gauges are installed at equal angles on the inner side of side ring one. Multiple high-speed industrial cameras are installed at equal angles on the inner side of side ring two.

[0006] Preferably, a top plate is fixedly sleeved between the two square rods, an electric push rod is fixedly installed at the bottom of the top plate, and the top of the top frame is fixed to the output end of the electric push rod.

[0007] Preferably, a base plate located between two movable frames is fixedly installed on the inner side of the base frame. The base plate is fixedly sleeved on the outer side of two square round rods. A drive motor is fixedly installed on the top of the base plate. A drive shaft is fixedly connected to the drive motor. A top plate is fixedly connected to the top of the drive shaft. Two drive rods are rotatably connected to the top of the top plate at equal angles. The ends of the two drive rods away from the top plate are rotatably connected to the two movable frames respectively.

[0008] Preferably, the adjustment mechanism includes a guide rod fixed between the base frame and the base, a guide plate movably sleeved on the outer side of the guide rod, a U-shaped round rod fixedly connected to the top of the guide plate, a lifting plate movably sleeved on the outer side of the U-shaped round rod, and side ring one and side ring two fixed to the top of the lifting plate.

[0009] Preferably, the bottom of the guide plate is symmetrically equipped with two support wheels, both located at the top of the base, and an electric push rod II is fixedly installed on the outer side of the base frame, with the guide plate fixed to the output end of the electric push rod II.

[0010] Preferably, a sleeve plate is fixedly sleeved on the outer middle part of the U-shaped rod, a lead screw is rotatably connected to the bottom of the sleeve plate, a nut is threadedly sleeved on the outer side of the lead screw, a lifting plate is fixed to the outer side of the nut, an adjusting motor is fixedly connected to the bottom end of the lead screw, and the adjusting motor is fixed to the top of the guide plate.

[0011] Preferably, the heat dissipation mechanism includes an air inlet duct fixed to the outside of the base frame, a cooling fan fixedly installed inside the air inlet duct, high-temperature resistant protective covers fixedly installed on the inner sides of side ring one and side ring two, flexible hoses fixedly connected between side ring one and side ring two and the air inlet duct, and heat dissipation vents provided on side ring one and side ring two.

[0012] Preferably, an inner ring is fixedly connected inside the air inlet duct, and a filter screen is provided on the side of the inner ring away from the cooling fan. An installation ring is provided on the outer side of the air inlet duct, and a sealing ring that fits against the end of the air inlet duct is fixedly connected to the outer side of the installation ring. A limiting cylinder is fixedly connected to the outer side of the installation ring, and the limiting cylinder is inserted into the air inlet duct and abuts against the side of the filter screen away from the inner ring.

[0013] Preferably, an outer ring is fixedly sleeved on the outer side of the air inlet duct, and two bolts are symmetrically installed between the mounting ring and the outer ring. Two positioning rods are symmetrically fixedly connected to the outer side of the outer ring, and the mounting ring is sleeved on the outer side of the two positioning rods.

[0014] A defect identification method for a hot-rolled intelligent sizing system for rebar includes the following steps: Step 1: After sizing, the threaded steel bar passes through the side ring 2, and a high-speed industrial camera arranged in a ring array synchronously captures images of the entire circumferential surface of the steel bar at a high frame rate. Step 2: The image data is transmitted to the defect recognition algorithm model and compared with the texture and contour features of qualified samples. Finally, defects such as surface cracks, missing lines, and pits are identified.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention enables multi-directional measurement of the diameter of rebar by setting up multiple laser diameter measuring instruments, and the lifting and lowering of the top frame can be achieved by activating an electric push rod, which facilitates changing the distance between the top roller and the bottom roller. The horizontal movement of two movable frames can be driven by activating a drive motor, which facilitates changing the distance between the front and rear sets of side rollers, thereby improving the hot rolling sizing effect of rebar. Furthermore, by setting up multiple high-speed industrial cameras, the surface defects of the rebar can be automatically and quickly identified.

[0016] 2. This invention can drive the first and second side rings to move horizontally by activating the second electric push rod, and can raise and lower the first and second side rings by activating the adjustment motor, thereby facilitating the change of the position of the laser diameter measuring instrument and the high-speed industrial camera to adapt to different specifications of threaded steel.

[0017] 3. This invention provides high-temperature resistant protective covers on the inner sides of both side ring one and side ring two, which can isolate heat radiation. By activating the cooling fan, outside air can be filtered through the filter screen and enter the two high-temperature resistant protective covers, which can dissipate heat from the laser diameter measuring instrument and the high-speed industrial camera, thereby ensuring the normal operation of the laser diameter measuring instrument and the high-speed industrial camera. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0019] In the attached diagram: Figure 1 This is a schematic diagram of the intelligent sizing system for hot-rolled rebar of the present invention; Figure 2 This is a schematic diagram of the sizing mechanism of the present invention; Figure 3 This is a schematic diagram of the movable frame structure of the present invention; Figure 4 This is a schematic diagram of the adjustment mechanism structure of the present invention; Figure 5 This is a schematic diagram of the top plate structure of the present invention; Figure 6 This is a schematic diagram of the heat dissipation mechanism of the present invention; Figure 7 This is a schematic cross-sectional view of the air inlet duct of the present invention; Figure 8 This is a schematic diagram of the mounting ring structure of the present invention.

[0020] In the diagram: 1. Base; 2. Sizing mechanism; 201. Base frame; 202. Movable frame; 203. Square rod; 204. Electric push rod one; 205. Top plate; 206. Side plate; 207. Top frame; 208. Top roller; 209. Bottom roller; 2010. Side ring one; 2011. Side ring two; 2012. High-speed industrial camera; 2013. Laser diameter gauge; 2014. Drive rod; 2015. Base plate; 2016. Drive motor; 2017. Drive shaft; 2018. Top plate; 2019. Side roller; 3. Adjustment mechanism; 301. Guide. 302. Electric push rod II; 303. Guide plate; 304. Support wheel; 305. Lifting plate; 306. U-shaped round rod; 307. Sleeve plate; 308. Nut; 309. Adjusting motor; 3010. Lead screw; 4. Heat dissipation mechanism; 401. Air inlet; 402. Heat dissipation port; 403. High temperature resistant protective cover; 404. Flexible hose; 405. Cooling fan; 406. Positioning rod; 407. Mounting ring; 408. Bolt; 409. Outer ring; 4010. Limiting cylinder; 4011. Inner ring; 4012. Filter screen; 4013. Sealing ring. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0022] Example 1, by Figures 1-8The present invention relates to an intelligent sizing system for hot-rolled rebar, comprising a base 1, a sizing mechanism 2 on the top of the base 1, and an adjustment mechanism 3 and a heat dissipation mechanism 4 on the sizing mechanism 2.

[0023] In Embodiment 2, based on Embodiment 1, the sizing mechanism 2 includes a base frame 201 fixed to the top of the base 1. Two bottom rollers 209 are symmetrically rotatably connected to the inner side of the base frame 201. Two square rods 203 are symmetrically arranged above the base 1. The base frame 201 is fixedly sleeved on the outer side of the two square rods 203. Two side plates 206 are symmetrically movably sleeved between the two square rods 203. A top frame 207 is fixedly connected between the two side plates 206. When the top frame 207 rises or falls, it drives the two side plates 209... 6. All slide along the two square round rods 203 to guide the top frame 207 and ensure its stability during movement. Two top rollers 208 are symmetrically rotatably connected to the inner side of the top frame 207. The two top rollers 208 are located directly above the two bottom rollers 209. Two movable frames 202 are symmetrically movably sleeved between the two square round rods 203. Two side rollers 2019 are symmetrically rotatably connected to the inner side of each movable frame 202. Side ring 1 2010 and side ring 2011 are symmetrically arranged above the base 1. 201 is located between side ring 1 2010 and side ring 2 2011. Multiple laser diameter gauges 2013 are installed at equal angles on the inner side of side ring 1 2010, and multiple high-speed industrial cameras 2012 are installed at equal angles on the inner side of side ring 2 2011. A top plate 205 is fixedly sleeved between two square rods 203. An electric push rod 204 is fixedly installed at the bottom of the top plate 205. The top of the top frame 207 is fixed to the output end of the electric push rod 204. The inner side of the base frame 201 is fixedly installed with two movable... The base plate 2015 between the frames 202 is fixedly sleeved on the outside of the two square round rods 203. The top of the base plate 2015 is fixedly installed with a drive motor 2016. The drive motor 2016 is fixedly connected with a drive shaft 2017. The top of the drive shaft 2017 is fixedly connected with a top plate 2018. The top of the top plate 2018 is rotatably connected with two drive rods 2014 at equal angles. The ends of the two drive rods 2014 away from the top plate 2018 are rotatably connected to the two movable frames 202 respectively. When the hot-rolled rebar passes through the side ring 2010, the laser diameter gauges 2013 collect real-time diameter and cross-sectional roundness data of the rebar from multiple angles and transmit the data to the control unit. The control unit, based on preset rebar specification parameters, controls the electric push rod 204 to start, driving the top frame 207 to move longitudinally, thereby raising and lowering the top roller 208 and changing the distance between the top roller 208 and the bottom roller 209. Simultaneously, it controls the drive motor 2016 to start, driving the top plate 2018 to rotate via the drive shaft 2017. This rotation, through two drive rods 2014, drives the two movable frames 202 to rotate along... Two square rods 203 slide horizontally, changing the distance between the two sets of side rollers 2019. The high-temperature rebar then passes through the extrusion space formed by the top roller 208, bottom roller 209, and side rollers 2019 in sequence, performing multi-dimensional precise shaping of the rebar and completing the sizing operation. After sizing, the rebar passes through the second side ring 2011. A high-speed industrial camera 2012 arranged in a ring array synchronously captures images of the rebar's entire circumferential surface at a high frame rate. The image data is transmitted to the defect recognition algorithm model, which compares it with the texture and contour features of qualified samples, and finally identifies defects such as surface cracks, missing lines, and pits.

[0024] In Embodiment 3, based on Embodiment 1, the adjusting mechanism 3 includes a guide rod 301 fixed between the base frame 201 and the base 1. A guide plate 303 is movably sleeved on the outer side of the guide rod 301. A U-shaped round rod 306 is fixedly connected to the top of the guide plate 303. A lifting plate 305 is movably sleeved on the outer side of the U-shaped round rod 306. Side ring 1 2010 and side ring 2 2011 are both fixed to the top of the lifting plate 305. Two support wheels 304, both located on the top of the base 1, are symmetrically installed at the bottom of the guide plate 303. The support wheels 304 are used to adjust the guide plate 303. Support is provided to ensure the stability of the guide plate 303 during movement. An electric push rod 302 is fixedly installed on the outer side of the base frame 201. The guide plate 303 is fixed on the output end of the electric push rod 302. A sleeve plate 307 is fixedly sleeved on the middle of the outer side of the U-shaped round rod 306. A lead screw 3010 is rotatably connected to the bottom of the sleeve plate 307. A nut 308 is threaded on the outer side of the lead screw 3010. A lifting plate 305 is fixed to the outer side of the nut 308. An adjusting motor 309 is fixedly connected to the bottom end of the lead screw 3010. The adjusting motor 309 is fixed to the top of the guide plate 303. When the regulating motor 309 is started, it drives the lead screw 3010 to rotate, which in turn drives the lifting plate 305 to slide along the U-shaped round rod 306 through the lead screw nut 308, thereby realizing the lifting of side ring 1 2010 and side ring 2 2011. When the electric push rod 2 302 is activated, it drives the guide plate 303 to slide along the guide rod 301, thereby moving the side ring 1 2010 and the side ring 2 2011 back and forth. Finally, the positions of the laser diameter measuring instrument 2013 and the high-speed industrial camera 2012 are adjusted according to the different specifications of the threaded steel.

[0025] In Embodiment 4, based on Embodiment 1, the heat dissipation mechanism 4 includes an air inlet duct 401 fixed to the outside of the base frame 201. A cooling fan 405 is fixedly installed inside the air inlet duct 401. High-temperature resistant protective covers 403 are fixedly installed on the inner sides of side ring 1 2010 and side ring 2 2011. Flexible hoses 404 are fixedly connected between side ring 1 2010 and side ring 2 2011 and the air inlet duct 401. Heat dissipation vents 402 are provided on side ring 1 2010 and side ring 2 2011. An inner ring 4011 is fixedly connected inside the air inlet duct 401. A filter screen 4012 is provided on the side of the inner ring 4011 away from the cooling fan 405. A heat dissipation device 4012 is provided on the outer side of the air inlet duct 401. The mounting ring 407 has a sealing ring 4013 fixedly connected to its outer side, which fits against the end of the air inlet duct 401. A limiting cylinder 4010 is fixedly connected to the outer side of the mounting ring 407. The limiting cylinder 4010 is inserted into the air inlet duct 401 and abuts against the side of the filter screen 4012 away from the inner ring 4011. An outer ring 409 is fixedly sleeved on the outer side of the air inlet duct 401. Two bolts 408 are symmetrically installed between the mounting ring 407 and the outer ring 409. Two positioning rods 406 are symmetrically fixedly connected to the outer side of the outer ring 409. The mounting ring 407 is sleeved on the outer side of the two positioning rods 406. The high-temperature resistant protective cover 403 serves to isolate heat radiation and prevent dust and splash. First, place the filter screen 4012 inside the air inlet duct 401 until it abuts against the inner ring 4011. Then, put the mounting ring 407 on the outside of the two positioning rods 406 and push it to move the limiting cylinder 4010 into the air inlet duct 401 until the sealing ring 4013 is in contact with the air inlet duct 401. At this time, the limiting cylinder 4010 abuts against the filter screen 4012. Then, fix the mounting ring 407 to the outer ring 409 with two bolts 408 to complete the installation of the filter screen 4012. Then, the cooling fan 405 is turned on, allowing outside cold air to enter the air inlet duct 401 after being filtered by the filter screen 4012. Subsequently, the cold air enters the two high-temperature resistant protective covers 403 through the two hoses 404, thereby dissipating heat from the laser diameter measuring instrument 2013 and the high-speed industrial camera 2012. The heat inside the two high-temperature resistant protective covers 403 is discharged from the two heat dissipation vents 402, thus preventing the laser diameter measuring instrument 2013 and the high-speed industrial camera 2012 from overheating and affecting their use.

Claims

1. A threaded steel hot rolling intelligent sizing system comprising a base (1), characterized in that: The base (1) is provided with a sizing mechanism (2) at the top, and the sizing mechanism (2) is provided with an adjustment mechanism (3) and a heat dissipation mechanism (4). The sizing mechanism (2) includes a base frame (201) fixed to the top of the base (1). Two bottom rollers (209) are symmetrically rotatably connected to the inner side of the base frame (201). Two square rods (203) are symmetrically arranged above the base (1). The base frame (201) is fixedly sleeved on the outer side of the two square rods (203). Two side plates (206) are symmetrically movably sleeved between the two square rods (203). A top frame (207) is fixedly connected between the two side plates (206). Two top rollers (208) are symmetrically rotatably connected to the inner side of the top frame (207). The two top rollers (208) are located at two... Above the bottom roller (209), two movable frames (202) are symmetrically and movably connected between two square round rods (203). The inner sides of the two movable frames (202) are symmetrically and rotatably connected to two side rollers (2019). The base (1) is symmetrically provided with side ring one (2010) and side ring two (2011) above it. The base frame (201) is located between side ring one (2010) and side ring two (2011). Multiple laser diameter gauges (2013) are installed at equal angles on the inner side of side ring one (2010), and multiple high-speed industrial cameras (2012) are installed at equal angles on the inner side of side ring two (2011).

2. The hot-rolled threaded steel intelligent sizing system of claim 1, wherein: A top plate (205) is fixedly sleeved between the two square rods (203). An electric push rod (204) is fixedly installed at the bottom of the top plate (205). The top of the top frame (207) is fixed to the output end of the electric push rod (204).

3. The hot rolling intelligent sizing system for threaded steel according to claim 1, characterized in that: The base plate (2015) located between the two movable frames (202) is fixedly installed on the inner side of the base frame (201). The base plate (2015) is fixedly sleeved on the outer side of the two square round rods (203). The top of the base plate (2015) is fixedly installed with a drive motor (2016). The drive motor (2016) is fixedly connected with a drive shaft (2017). The top of the drive shaft (2017) is fixedly connected with a top plate (2018). The top of the top plate (2018) is rotatably connected with two drive rods (2014) at equal angles. The ends of the two drive rods (2014) away from the top plate (2018) are rotatably connected to the two movable frames (202) respectively.

4. The threaded steel hot rolling intelligent sizing system according to claim 1, characterized in that: The adjustment mechanism (3) includes a guide rod (301) fixed between the base frame (201) and the base (1). A guide plate (303) is movably sleeved on the outside of the guide rod (301). A U-shaped round rod (306) is fixedly connected to the top of the guide plate (303). A lifting plate (305) is movably sleeved on the outside of the U-shaped round rod (306). Side ring one (2010) and side ring two (2011) are both fixed to the top of the lifting plate (305).

5. The threaded steel hot rolling intelligent sizing system according to claim 4, characterized in that: The bottom of the guide plate (303) is symmetrically equipped with two support wheels (304) located on the top of the base (1). An electric push rod (302) is fixedly installed on the outside of the base frame (201). The guide plate (303) is fixed on the output end of the electric push rod (302).

6. The threaded steel hot rolling intelligent sizing system according to claim 4, characterized in that: A sleeve plate (307) is fixedly sleeved on the middle of the outer side of the U-shaped rod (306). A lead screw (3010) is rotatably connected to the bottom of the sleeve plate (307). A nut (308) is threaded onto the outer side of the lead screw (3010). A lifting plate (305) is fixed to the outer side of the nut (308). An adjusting motor (309) is fixedly connected to the bottom end of the lead screw (3010). The adjusting motor (309) is fixed to the top of the guide plate (303).

7. The threaded steel hot rolling intelligent sizing system according to claim 1, characterized in that: The heat dissipation mechanism (4) includes an air inlet duct (401) fixed to the outside of the base frame (201). A cooling fan (405) is fixedly installed inside the air inlet duct (401). High-temperature resistant protective covers (403) are fixedly installed on the inner sides of the first side ring (2010) and the second side ring (2011). Flexible hoses (404) are fixedly connected between the first side ring (2010) and the second side ring (2011) and the air inlet duct (401). Heat dissipation vents (402) are provided on the first side ring (2010) and the second side ring (2011).

8. The threaded steel hot rolling intelligent sizing system according to claim 7, characterized in that: An inner ring (4011) is fixedly connected inside the air inlet duct (401). A filter screen (4012) is provided on the side of the inner ring (4011) away from the cooling fan (405). An installation ring (407) is provided on the outside of the air inlet duct (401). A sealing ring (4013) that fits against the end of the air inlet duct (401) is fixedly connected to the outside of the installation ring (407). A limiting cylinder (4010) is fixedly connected to the outside of the installation ring (407). The limiting cylinder (4010) is inserted into the air inlet duct (401) and abuts against the side of the filter screen (4012) away from the inner ring (4011).

9. The threaded steel hot rolling intelligent sizing system according to claim 7, characterized in that: An outer ring (409) is fixedly sleeved on the outer side of the air inlet duct (401). Two bolts (408) are symmetrically installed between the mounting ring (407) and the outer ring (409). Two positioning rods (406) are symmetrically fixedly connected to the outer side of the outer ring (409). The mounting ring (407) is sleeved on the outer side of the two positioning rods (406).

10. A defect identification method of a threaded steel hot rolling intelligent sizing system, used in the threaded steel hot rolling intelligent sizing system according to any one of claims 1-9, characterized in that, Includes the following steps: Step 1: After sizing, the threaded steel bar passes through the second side ring (2011), and a high-speed industrial camera (2012) arranged in a ring array simultaneously captures images of the entire circumferential surface of the steel bar at a high frame rate; Step 2: The image data is transmitted to the defect recognition algorithm model and compared with the texture and contour features of qualified samples. Finally, defects such as surface cracks, missing lines, and pits are identified.

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