Large-specification bar rolling equipment and technology

Abstract

The invention provides large-size bar rolling equipment and technology, and relates to the technical field of bar rolling equipment.The large-size bar rolling equipment comprises a rolling unit and a rotary material guiding assembly, the rotary material guiding assembly comprises a U-shaped bracket, a restraining part is installed on the top of the U-shaped bracket, a rotary material guiding barrel is rotationally installed in the restraining part, and four sets of bearing grooves extending in the axial direction are formed in the outer wall of the rotary material guiding barrel; the rotary material guide cylinder is circularly switched among a material receiving position, a sampling position, a first material unloading position and a second material unloading position; and the cutting and sampling assembly is mounted at the sampling position on the outer side of the ring cutting cylinder. Through the rotary material guiding assembly, connection and efficient turnover of bars among rolling, pre-cooling, online deformation detection, automatic sampling and qualified / unqualified product classified discharging are achieved, and collision damage and production interruption caused by traditional multi-link transferring are fundamentally reduced; and by combining the lateral air blowing slow cooling technology and the partitioned hot air heat preservation technology, precise temperature control over a bar cooling path is achieved, and the problems of deformation and cracking of large-specification bars caused by temperature difference stress are effectively solved.

Description

Technical Field

[0001] This invention relates to the field of bar rolling equipment technology, specifically to a large-diameter bar rolling equipment and process. Background Technology

[0002] In fields such as construction engineering, machinery manufacturing, and rail transportation, φ42mm, φ45mm, φ48mm, and φ50mm round steel bars are key structural materials. Their mechanical properties (such as strength and toughness) and surface quality directly determine the assembly accuracy and safety of downstream products. Therefore, quality control throughout the entire rolling process is crucial for the production of these round steel bars. Currently, the large-scale rolling of these round steel bars has formed a standardized process system, mainly covering key stages such as raw material batching, billet heating, roughing and intermediate rolling, pre-piercing temperature control, finish rolling, water piercing temperature control, cooling bed cooling, length shearing, collection and packaging, weighing and bundling, and hoisting and warehousing. The coordinated cooperation of each process is the foundation for ensuring product quality. However, traditional large-size bar rolling equipment and supporting processes have the following drawbacks: First, the bar cooling output stage lacks a transfer and buffer design, and material accumulation is prone to occur at the input end of the cooling bed, interfering with the continuous conveying of bars and affecting the continuity of the production process; Second, quality inspection and sampling rely on manual operation, requiring manual clamping of the bar end and cutting with a cutting gun for sampling, which is cumbersome and labor-intensive; Third, in the collection stage, deformed bars are mixed with undeformed bars, requiring manual sorting and classification, which is not only inefficient and prone to misjudgment, increasing subsequent sorting costs, but also unable to quickly trace the stage of deformation (cooling bed stage or before cooling bed), hindering targeted adjustments to the production process; Fourth, the cooling bed lacks targeted temperature control and heat equalization structure, with the head of the bar entering the cooling bed first and the tail later, forming a significant head-tail temperature difference, causing deformation due to uneven stress during bar cooling, affecting the dimensional accuracy and mechanical property stability of the product. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a large-size bar rolling equipment and process, which solves the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A large-size bar rolling equipment includes a rolling mill unit, which is arranged in sequence according to the bar conveying direction, including a roughing mill unit, an intermediate mill unit, a finishing mill unit, and a disc shear. A water-cooled cooling unit is installed at the output end of a disc shear. The brake is installed at the output end of the water-cooled machine; The rotary guide assembly includes a U-shaped support, a constraint component mounted on the top of the U-shaped support, and a rotary guide cylinder rotatably mounted inside the constraint component. The outer wall of the rotary guide cylinder has four sets of axially extending receiving grooves, with open ends at both ends. The rotary guide cylinder cyclically switches between a receiving position, a sampling position, a first unloading position, and a second unloading position. The constraint component is used to constrain the bar stock within the receiving grooves from the outside. The receiving position at the top of the rotary guide cylinder is connected to the output end of the brake. One end of the rotary guide cylinder is rotatably connected to a side-blowing assembly, which assists in reducing the temperature of the bar stock. A deformation detection assembly is installed at the receiving position of the rotary guide cylinder. The cutting and sampling assembly is installed at the sampling position on the outside of the cutting ring cylinder. The cutting and sampling assembly is used to periodically cut the end of the bar as a test sample. The cooling bed includes a reciprocating conveyor frame, the receiving end of which is located below the first unloading position at the bottom of the rotary guide cylinder; the reciprocating conveyor frame is equipped with downward blowing components at intervals, and both ends of the reciprocating conveyor frame are equipped with self-rotation drive components, which are used to drive the bar to rotate and cool, and the downward blowing components are used to blow air onto the bar to assist in cooling.

[0005] As a second aspect of the present invention, a large-diameter bar rolling process is proposed. Based on the aforementioned large-diameter bar rolling equipment, the rolling process is as follows: S1. Bar rolling: Cast bars are rolled by roughing mill, intermediate mill, and finishing mill, and cut into appropriate cooling lengths by disc shears; after cooling by water cooling machines, the bars are output by brake machines. S2, Circular Pre-cooling Turnover: The bar stock enters the receiving position of the rotary guide cylinder, and the deformation detection component detects and corrects the shape; after detection, the rotary guide cylinder rotates, and the sampling position takes samples by plasma cutting as needed; qualified bars are rotated to the first unloading position and fall, while unqualified bars are rotated to the second unloading position and rolled into the defective product storage platform; while the rotary guide cylinder rotates, the side blowing component exhausts air and exchanges heat to achieve slow cooling of the bars; S3 Cooling Bed: The reciprocating conveyor gradually transports the bar stock, and the self-rotation drive component drives the bar stock to rotate and cool it evenly; the downward blowing component blows air on the bar stock as needed to assist in cooling; when there is a large temperature difference between the head and tail, the directional air supply component sends hot air to the head to balance the head and tail temperatures.

[0006] This invention provides a large-diameter bar rolling equipment. Compared with the prior art, it has the following advantages: This invention proposes a rolling mill, a water cooling machine, a braking machine, and a rotary material guide assembly that are sequentially connected. The rotary material guide assembly's rotating guide cylinder can cyclically switch between receiving, sampling, and loading / unloading positions, achieving a tight connection between "rolling - precooling - inspection - sorting and unloading," reducing the number of bar transfer links and lowering the risk of collision and deformation. At the same time, by using a rotary guide cylinder to transfer materials, it can prevent bars from accumulating at the input end of the cooling bed, ensuring continuous production. The proposed deformation detection component allows for pressure testing of the input bars to determine if deformation has occurred. Defective bars can be corrected by pressure, ensuring smooth rotation into the constraint component. Qualified bars proceed to the cooling bed via the first unloading position, while defective bars proceed to the defective product storage platform via the second unloading position, achieving precise classification. Simultaneously, the rotary guide cylinder, in conjunction with the constraint component, provides stable support for the bars, ensuring they remain stably positioned within the receiving groove during rotation. The constraint component can be opened at the receiving position, sampling position, first unloading position, and second unloading position to facilitate receiving and discharging. The proposed side-blowing component can guide air into the rotating guide cylinder to achieve non-contact heat exchange for the bar stock, enabling slow cooling and avoiding rapid deformation. The hot air after heat exchange can be exported to the directional air supply component as needed for secondary utilization. At the same time, the cutting and sampling component can take samples at regular intervals during the rotation and conveying of the bar stock, without stopping the machine or requiring manual operation, thus achieving rapid sampling. The reciprocating conveyor frame of the cooling bed works in conjunction with the self-rotating drive component to drive the bar to rotate and cool it with multi-dimensional air blowing to ensure uniform cooling. Finally, based on the slow cooling and heat preservation component, hot air is output in a directional manner through the directional air supply component (recovering the heat after heat exchange in the rotating guide cylinder) to balance the temperature difference of the bar, avoid cracking and save energy. Attached Figure Description

[0007] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0008] Figure 1 A schematic diagram of the overall structure of the present invention is shown; Figure 2 A front view schematic diagram of the brake mechanism of the present invention is shown; Figure 3 A rear-view structural schematic diagram of the brake mechanism of the present invention is shown; Figure 4 A schematic diagram of the rotary material guide assembly and cooling bed structure of the present invention is shown; Figure 5 This shows a schematic diagram of the rotating material guiding assembly of the present invention from one perspective. Figure 6 This shows a schematic diagram of the rotating material guide assembly of the present invention from another perspective; Figure 7 A schematic diagram of the end cross-sectional structure of the rotary guide cylinder of the present invention is shown; Figure 8 It shows Figure 5 A magnified structural diagram at point A; Figure 9 A schematic diagram of the cutting and sampling component structure of the present invention is shown; Figure 10 It shows Figure 9 A magnified structural diagram at point B; Figure 11 A schematic diagram of the slow-cooling and heat-insulating component structure of the present invention is shown; Figure 12 A schematic diagram of the directional air supply component of the present invention is shown; Figure 13 This diagram shows the structural arrangement of the directional air supply component and the insulated air box of the present invention. Figure 14 A schematic diagram of the internal cross-sectional structure of the damper sleeve of the present invention is shown; Figure 15 A schematic diagram of the blower component structure of the present invention is shown; Figure 16 A schematic diagram of the reciprocating conveyor frame structure of the present invention is shown; Figure 17 A schematic diagram of the self-rotation drive component of the present invention is shown; As shown in the figure: 100. Rolling mill unit; 110. Roughing mill unit; 120. Intermediate rolling mill unit; 130. Finishing mill unit; 140. Disc shear. 200. Water-cooled chiller; 300. Brake mechanism; 310. Fixed roller assembly frame; 320. Brake backplate; 330. Moving roller clamping frame; 340. Vertical guide rail. 400. Rotary guide assembly; 410. U-shaped support; 420. Constraint component; 421. Side fixing rod; 422. Constraint ring plate; 423. Feeding notch; 424. Qualified product unloading notch; 425. Qualified product baffle; 426. Defective product unloading notch; 427. Defective product baffle; 428. Sampling notch; 429. Sampling baffle; 431. First rotating rod; 432. Second rotating rod; 440. Rotary guide cylinder; 441. Receiving groove; 442. Cutting ring groove; 450. Receiving position; 460. Sampling position; 470. First unloading position; 480. Second unloading position; 500. Cutting and sampling assembly; 510. Receiving inclined plate; 520. Stop block; 530. Fixed hanging plate; 531. Cutter drive cylinder; 532. Plasma torch; 540. Telescopic guide rail; 550. First driven gear. 600. Side-blowing assembly; 610. Cooling fan; 620. Main air supply pipe; 630. Rotary air inlet connector; 640. Second driven gear; 650. Rotary drive motor; 660. Hot air exhaust connector. 700 Deformation detection assembly; 710 Detection frame; 720 Clamping drive cylinder; 730 Clamping crossbeam; 740 Detection pressure head; 800. Slow-cooling insulation component; 810. Insulated air box; 811. Three-way valve; 820. Defective product storage platform; 830. Directional air supply component; 831. Third rotating rod; 832. Axial limiting strip; 833. Air damper sleeve; 834. Radial stop block; 835. Sliding groove; 836. Insulated air damper; 837. Locking slot; 838. Locking insert plate; 839. Air damper drive cylinder. 900. Cooling bed; 910. Reciprocating conveyor frame; 911. Lifting hydraulic cylinder; 912. Base plate; 913. Moving slide; 914. Translation hydraulic cylinder; 915. Support rod; 916. Feed toothed plate; 920. Downward blowing component; 921. Support toothed plate; 922. Air guide branch pipe; 923. Air guide main pipe; 924. Cooling bed fan; 925. Support column; 926. Upper exhaust vent; 927. Side exhaust vent; 928. Feeding inclined plate; 930. Rotation drive component; 931. Rotating bracket; 932. Drive wheel; 933. Drive shaft. Detailed Implementation

[0009] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0010] As an embodiment of the present invention, in order to solve the technical problems in the background art, the following large-size bar rolling equipment is provided: like Figure 1 As shown, the provided large-size bar rolling equipment includes a rolling mill 100, which is arranged in sequence according to the bar conveying direction, including a roughing mill 110, an intermediate mill 120, a finishing mill 130, and a disc shear 140. A water-cooled cooling unit 200 is installed at the output end of a disc shear 140; Brake 300 is installed at the output end of water-cooled machine 200; Rotary feeder assembly 400, such as Figure 4 - Figure 6 As shown, it includes a U-shaped support 410, a constraint member 420 is mounted on the top of the U-shaped support 410, a rotary guide cylinder 440 is rotatably mounted inside the constraint member 420, and the outer wall of the rotary guide cylinder 440 is provided with four sets of axially extending receiving grooves 441, such as... Figure 7 , Figure 9As shown, the receiving groove 441 has open ends. The rotary guide cylinder 440 cycles between the receiving position 450, the sampling position 460, the first unloading position 470 (i.e., the qualified product unloading position), and the second unloading position 480 (i.e., the defective product unloading position). The constraint component 420 is used to constrain the bar in the receiving groove 441 from the outside. The receiving position 450 at the top of the rotary guide cylinder 440 is connected to the output end of the brake 300. One end of the rotary guide cylinder 440 is rotatably connected to the side blowing assembly 600, which is used to help reduce the temperature of the bar. A deformation detection assembly 700 is installed at the receiving position 450 of the rotary guide cylinder 440. Cutting and sampling component 500, such as Figure 4 As shown, it is installed at sampling position 460 on the outside of the cutting ring cylinder. The cutting and sampling component 500 is used to periodically cut the end of the bar as a test sample. Cold bed 900, such as Figure 4 As shown, it includes a reciprocating conveyor frame 910, the receiving end of which is located below the first unloading position 470 at the bottom of the rotary guide cylinder 440, for receiving bars from the first unloading position 470; the reciprocating conveyor frame 910 is internally equipped with a downward blowing component 920, and both ends of the reciprocating conveyor frame 910 are equipped with a rotation drive component 930, the rotation drive component 930 is used to drive the bars to rotate and cool them, and the downward blowing component 920 is used to blow air onto the bars to assist in cooling them; Slow-cooling insulation component 800, such as Figure 4 , Figure 11 As shown, it includes an insulated air box 810, which is located at the top of the input end of the reciprocating conveyor frame 910. A defective product storage platform 820 is installed on the top surface of the insulated air box 810, and the defective product storage platform 820 is located at the second unloading position 480 inside the rotary guide cylinder 440. A directional air supply component 830 is installed on the bottom surface of the insulated air box 810. The directional air supply component 830 is used to output hot air to the designated insulation area of ​​the bar. The input end of the directional air supply component 830 is rotatably connected to the other end of the rotary guide cylinder 440.

[0011] In the above scheme, it should be noted that: The rolling mill 100, water cooling machine 200, brake machine 300, and rotary guide assembly 400 are connected in sequence. The purpose is that the rotary guide cylinder 440 of the rotary guide assembly 400 can be cyclically switched between receiving, sampling, and dual unloading positions to achieve a close connection between "rolling - precooling - inspection - sorting and unloading", reduce the bar material transfer links, and reduce the risk of collision and deformation. At the same time, the use of the rotary guide cylinder 440 to transfer materials can avoid the accumulation of bars at the input end of the cooling bed 900, ensuring continuous production. Furthermore, the purpose of setting up the deformation detection component 700 is to perform pressure detection on the input bar stock, thereby determining whether the bar stock has deformed, and to press down and correct unqualified bars stock, so that the bars stock can smoothly rotate into the constraint component 420. Qualified bars stock go through the first unloading position 470 to the cooling bed 900, and unqualified bars stock go through the second unloading position 480 to the defective product temporary storage table 820, thus achieving accurate classification. The rotary guide cylinder 440, together with the constraint component 420, can stably support the bar. The constraint component 420 can ensure that the bar is stably placed in the receiving groove 441 during rotation. The constraint component 420 can be opened at the receiving position 450, the sampling position 460, the first unloading position 470 and the second unloading position 480 to realize receiving and discharging of materials.

[0012] The side-blowing component 600 can guide air into the rotary guide cylinder 440 to achieve non-contact heat exchange of the bar stock, enabling slow cooling and preventing rapid deformation. The hot air after heat exchange can be exported to the directional air supply component 830 as needed for secondary utilization. The cutting and sampling component 500 can take samples at regular intervals during the rotation and conveying of the bar stock, without stopping the machine or requiring manual operation, enabling rapid sampling. The reciprocating conveyor frame 910 of the cooling bed 900 works in conjunction with the self-rotation drive component 930 to drive the bar stock to rotate and provide multi-dimensional airflow cooling, ensuring uniform cooling. The slow cooling and heat preservation component 800 outputs hot air directionally through the directional air supply component 830 (recovering the heat after heat exchange in the rotary guide cylinder 440), balancing the temperature difference of the bar stock, preventing cracking, and saving energy.

[0013] In one embodiment of the present invention, since the large-size bar stock is conveyed at a high speed after rolling, it is easy for the bar stock to shake and collide with the inner wall of the rotating guide cylinder 440, causing surface damage or deformation.

[0014] Based on this, in this embodiment, as Figure 2 - Figure 3 As shown, the proposed brake 300 includes a fixed roller frame 310, a brake back plate 320, and a moving roller clamping frame 330, wherein, as Figure 1 As shown in the overall structural layout, the brake back plate 320 is located at the input end of the rotary guide cylinder 440. The outer wall of the brake back plate 320 is vertically symmetrically equipped with moving roller clamping frames 330. The back of the brake back plate 320 is equipped with a vertical guide rail 340. The backs of the two sets of moving roller clamping frames 330 are slidably installed in the vertical guide rail 340. The input end of the brake back plate 320 is equipped with a fixed roller frame 310. The bar passes through the fixed roller frame 310 and the two sets of moving roller clamping frames 330 in sequence.

[0015] In the above scheme, it should be noted that: the fixed roller frame 310 of the brake 300 guides the conveying direction of the bar stock, and the moving roller clamping frame 330 moves closer to the vertical guide rail 340. The clamping force can be adjusted according to the bar stock specifications to achieve uniform braking, allowing the bar stock to slowly enter the rotary guide cylinder 440 and avoid collision damage. During this period, the fixed roller frame 310 and the moving roller clamping frame 330 form a symmetrical constraint channel, ensuring that the bar stock maintains a straight posture after braking and enters the receiving groove 441 of the rotary guide cylinder 440, providing a stable benchmark for subsequent deformation detection, sampling and other processes.

[0016] In one embodiment of the present invention, such as Figure 5 As shown, the proposed constraint component 420 includes a side fixing rod 421 and a constraint ring plate 422. The constraint ring plate 422 is provided in multiple sets at axial intervals along the outer wall of the rotary guide cylinder 440. The outer wall of each set of constraint ring plates 422 is symmetrically fixed with a side fixing rod 421. The two ends of the side fixing rod 421 are fixedly connected to a U-shaped support 410.

[0017] Furthermore, such as Figure 7 - Figure 9 As shown, each set of constraint ring plates 422 has a feeding notch 423 at the top receiving position 450; each set of constraint ring plates 422 has a qualified product unloading notch 424 at the first unloading position 470, and a qualified product baffle 425 is rotatably installed inside the qualified product unloading notch 424. The rotatable parts of each set of qualified product baffles 425 are connected as one unit through the first rotating rod 431; at the same time, the constraint ring plate 422 has a defective product unloading notch 426 at the second unloading position 480, and a defective product baffle 427 is rotatably installed inside the defective product unloading notch 426. The rotatable parts of each set of defective product baffles 427 are connected as one unit through the second rotating rod 432; as Figure 10 As shown, a sampling notch 428 is provided on the constraint ring plate 422 at the input end. The sampling notch 428 is located at the sampling position 460, and a sampling baffle 429 is rotatably installed inside the sampling notch 428.

[0018] In the above scheme, it should be noted that: through the above technical concept, the constraint ring plate 422 is arranged at intervals along the axial direction of the rotary guide cylinder 440 to form a full-circumference constraint, preventing the bar from detaching from the receiving groove 441 when rotating; at the same time, the U-shaped support 410 is connected by the side fixing rod 421, which can enhance the stability of the constraint structure and adapt to the weight of large-size bars. By designing the feeding notch 423 of the receiving position 450 for the bar to enter, the sampling notch 428 of the sampling position 460 (equipped with sampling baffle 429), and the qualified product unloading notch 424 / defective product unloading notch 426 of the unloading position (equipped with qualified product baffle 425 / defective product baffle 427), the opening and closing of the baffles can be synchronously controlled by the rotating rod, so as to achieve precise entry and exit of the bar at each station, avoid jamming, and achieve efficient switching.

[0019] In one embodiment of the present invention, such as Figure 9 - Figure 10 As shown, the rotation point of the proposed sampling baffle 429 is located at the top and a first driven gear 550 is installed at the rotation point. A cutting ring groove 442 is opened on the outer wall of the input end of the rotary guide cylinder 440. The area between the cutting ring groove 442 and the constraint ring plate 422 located at the input end is the sampling area.

[0020] In one embodiment of the present invention, such as Figure 4 , Figure 9 As shown, the cutting and sampling assembly 500 includes a receiving inclined plate 510, which is placed in the sampling area. In specific implementation, the outer end of the receiving inclined plate 510 is provided with a stop 520, and the bottom surface of the stop 520 is equipped with a support column. One end of the stop 520 is equipped with a fixed hanging plate 530, and the bottom surface of the fixed hanging plate 530 is vertically provided with a cutter drive cylinder 531. The bottom end of the cutter drive cylinder 531 is vertically connected to a plasma cutting torch 532, which faces the cutting ring groove 442. At the same time, the other end of the stop 520 is equipped with a telescopic guide rail 540, and a gear is slidably installed inside the telescopic guide rail 540. The gear is engaged with the top of the first driven gear 550.

[0021] In the above scheme, it should be noted that: when the plasma cutting torch 532 of the cutting and sampling component 500 is aligned with the cutting ring groove 442 of the rotary guide cylinder 440, the end of the bar can be cut at a time when the rotary guide cylinder 440 rotates to the sampling position 460, so as to achieve the goal of not stopping the machine and not affecting the production rhythm. At the same time, the cutting ring groove 442 provides a fixed position reference for the cutting action, thereby ensuring that the sampling position is accurate each time and that the sample has good representativeness; while the telescopic guide rail 540 drives the rack to drive the first driven gear 550 to rotate, opening the sampling baffle 429, and the sample automatically slides into the receiving inclined plate 510 and is stopped by the stop block 520, without the need for manual picking up, which is safe and convenient and avoids burns from manual handling.

[0022] In one embodiment of the present invention, such as Figure 6 As shown, the side-blowing assembly 600 includes a cooling fan 610, the output end of which is connected to the main air supply pipe 620. A rotary air inlet connector 630 is installed at one end of the rotary guide cylinder 440. A second driven gear 640 is provided on the outer wall of the rotary air inlet connector 630. The second driven gear 640 meshes with and connects to a rotary drive motor 650. The rotary air inlet connector 630 is rotatably connected to the main air supply pipe 620. Figure 4 - Figure 5 As shown, a hot air discharge connector 660 is installed at the other end of the rotary guide cylinder 440, and a three-way valve 811 is rotatably installed at the output end of the hot air discharge connector 660.

[0023] In the above scheme, it should be noted that: the cooling fan 610 of the side-blowing assembly 600 sends air into the rotary guide cylinder 440 through the rotating air inlet joint 630, and the air flows along the rotary guide cylinder 440 to achieve uniform pre-cooling of the bar; the hot air after heat exchange can be directly output through the hot air outlet joint 660 and the three-way valve 811, or it can be transported to the slow cooling and heat preservation assembly 800 to achieve energy recovery and reuse, and reduce energy consumption. The rotary drive motor 650 drives the rotary guide cylinder 440 to rotate through the second driven gear 640, with a stable speed that is adapted to the pre-cooling and station switching rhythm.

[0024] In one embodiment of the present invention, since large-size bars are prone to local deformation after rolling, traditional inspection needs to be carried out offline, which is inefficient; slight deformation cannot be corrected in time, causing subsequent processes to be stuck; unqualified bars are mixed with qualified bars, which requires secondary sorting and increases costs.

[0025] Based on this, in this embodiment, as Figure 4 - Figure 5 and Figure 7 As shown, the deformation detection component 700 includes a detection frame 710, and a pressing drive cylinder 720 is symmetrically provided on the bottom surface of the detection frame 710. The bottom end of each pressing drive cylinder 720 is connected to a pressing crossbeam 730, and multiple sets of detection pressure heads 740 are provided opposite to each other on the bottom surface of the pressing crossbeam 730.

[0026] Furthermore, each set of detection pressure heads 740 is positioned above the feed notch 423, and a pressure sensor is embedded inside the detection pressure head 740. When the bar passes through, the system determines whether its shape is qualified by monitoring the resistance value of the pressure sensor: if the resistance is abnormal (determined as deformation), the detection pressure head 740 is controlled to press down for correction, so that the bar can smoothly enter the constraint ring plate 422 and finally be output from the second discharge position 480; if the resistance is normal (determined as qualified), the bar is directly output from the first discharge position 470. It should be noted that the pressure sensor preferably uses a high-temperature resistant sensitive element and compensation circuit to ensure its stable operation in high-temperature environments.

[0027] In the above scheme, it can be understood that the deformation detection component 700 uses multiple detection heads 740 (including pressure sensors) to press down on the bar stock, detecting its shape at multiple points. If slight deformation exists, the detection heads 740 can simultaneously press down to correct it, ensuring that the bar stock smoothly enters the constraint ring plate 422 and avoiding subsequent jamming. Bar stock that passes the inspection is output from the first unloading position 470 to the cooling bed 900, while unqualified bar stock goes through the second unloading position 480 to the defective product temporary storage table 820. This achieves simultaneous "inspection-classification," eliminating the need for secondary sorting and improving production efficiency.

[0028] Based on the above technical concept, if large-diameter bars rely solely on natural cooling, their cooling efficiency will inevitably be very low.

[0029] Based on this, in this embodiment, as Figure 4 , Figure 16 As shown, the reciprocating conveyor frame 910 also includes a lifting hydraulic cylinder 911, which is vertically arranged and has a base plate 912 at its top. A movable slide 913 is slidably installed on the top surface of the base plate 912. A horizontally arranged translation hydraulic cylinder 914 is connected to the surface of the movable slide 913. Multiple sets of support rods 915 are spaced apart on the surface of the movable slide 913, and each set of support rods 915 has a feed tooth plate 916 at its top.

[0030] Furthermore, such as Figure 15 As shown, the down-blowing component 920 for auxiliary cooling of the bar stock includes a support toothed plate 921, a branch air duct 922, a main air duct 923, and a cooling bed fan 924. In specific implementation, the support toothed plate 921 is located between two adjacent sets of feed toothed plates 916. One end of the support toothed plate 921 is provided with a feed ramp 928, which extends to the bottom of the first unloading position 470. Its purpose is to receive and guide the qualified bar stock unloaded from this position, so that it slides smoothly and with low impact into the reciprocating conveyor frame 910 of the cooling bed 900, ensuring that the bar stock is accurately positioned and smoothly enters the subsequent cooling process, thereby protecting the surface quality of the bar stock and ensuring the continuous and stable operation of the production line.

[0031] Meanwhile, a support column 925 is provided at one end of the bottom surface of the support tooth plate 921, and an air guide branch pipe 922 is provided vertically at the outer end of the support tooth plate 921. Multiple sets of air guide branch pipes 922 are connected in parallel to a main air guide pipe 923, and the main air guide pipe 923 is connected to the cooling bed fan 924. An upper exhaust air hole 926 is opened at the protruding teeth of the support tooth plate 921, and side exhaust air holes 927 are opened on both sides of the support tooth plate 921. The side exhaust air holes 927 and the upper exhaust air holes 926 are staggered.

[0032] Therefore, it can be understood that when the feed toothed plate 916 of the reciprocating conveyor 910 achieves vertical lifting and horizontal feeding through the third / fourth drive rod, the bar can be transferred segment by segment into the tooth groove of the support toothed plate 921, avoiding accumulation and ensuring that each bar can be fully cooled. Meanwhile, the air guide pipe 922 of the downward blowing component 920 sends air to the support toothed plate 921, forming multiple airflows through the upper exhaust hole 926 and the side exhaust hole 927, covering the surface of the bar, greatly improving the cooling uniformity and efficiency.

[0033] When large-diameter bars are cooled statically on a 900-degree cooling bed, the area in contact with the support surface dissipates heat slowly, resulting in a large radial temperature difference, which can cause warping or cracking.

[0034] Based on this, in this embodiment, as Figure 17As shown, it is preferred that both ends of the reciprocating conveyor 910 are equipped with a rotation drive component 930. The rotation drive component 930 includes a rotating bracket 931. The top of the rotating bracket 931 is linearly arrayed with drive wheels 932. The outer ends of the multiple sets of drive wheels 932 are connected to a set of drive shafts 933. The drive shafts 933 are used to drive the multiple sets of drive wheels 932 to rotate, thereby driving each set of bars to rotate.

[0035] In the above scheme, it is understood that, as Figure 4 As shown, the drive shaft 933 of the self-rotation drive component 930 drives multiple sets of drive wheels 932 to rotate. The two ends of the bar are placed on the drive wheels 932 and rotate synchronously with the drive wheels 932, so that all surfaces of the bar can fully contact the cooling air and eliminate radial temperature difference. At the same time, in conjunction with the axial conveying of the reciprocating conveyor frame 910, the bar achieves a composite motion of "self-rotation + axial movement", further shortening the cooling cycle and avoiding deformation.

[0036] In practical applications, large-diameter bars exhibit significant temperature differences between their heads and tails due to varying heat dissipation areas. If a traditional uniform cooling method using a cooling bed is employed, the inability to specifically regulate the temperature of cooler areas like the tail section leads to uneven shrinkage during cooling, further widening the temperature difference between the inside and outside, and between the head and tail. Furthermore, traditional methods have low utilization rates of residual heat from rolling, resulting in unstable insulation effects. This not only increases the risk of internal stress and even cracking within the bar but also wastes energy.

[0037] Based on this, in this embodiment, as Figure 4 , Figure 11 - Figure 13 As shown, the top surface of the heat-insulating air box 810 is provided with a downward exhaust hole, and the internal sandwich structure of the heat-insulating air box 810 is connected to the three-way valve 811 through a flexible hose.

[0038] Furthermore, the directional air supply component 830 includes a third rotating rod 831, which is symmetrically and rotatably mounted on the bottom surface of the insulated air box 810. Each set of third rotating rods 831 has multiple sets of damper sleeves 833 fitted on its outer wall. The side wall of the damper sleeve 833 is provided with an insulated damper 836. The inner wall of the damper sleeve 833 is provided with a radial stop 834. The outer wall of the damper sleeve 833 is provided with a locking groove 837. The outer wall of the third rotating rod 831 is provided with multiple sets of axial limiting strips 832.

[0039] Furthermore, such as Figure 14As shown, the axial limiting strip 832 is stopped below the radial stop block 834. The two sides of the heat-insulating air box 810 are symmetrically provided with damper drive cylinders 839. The output end of the damper drive cylinder 839 is connected to the locking plate 838, which is inserted into the locking slot 837. The inner wall of the damper sleeve 833 is provided with a sliding groove 835 adapted to the rotation of the axial limiting strip 832. When the locking plate 838 disengages from the locking slot 837, the third rotating rod 831 and the axial limiting strip 832 rotate, causing the radial stop block 834 to lose support. The heat-insulating damper 836 rotates downward under its own weight, and the two sets of heat-insulating dampers 836 form a enclosure structure in the slow cooling and heat-insulating zone of the bar.

[0040] In the above scheme, it can be understood that the directional air supply component 830 controls the opening and closing of the locking plate 838 through the damper drive cylinder 839. After the locking plate 838 disengages from the locking slot 837, the heat-insulating damper 836 rotates and opens under its own weight. Hot air is then blown directionally through the lower exhaust holes of the corresponding area towards the part of the bar with a large temperature difference (such as the head), slowing down the local cooling rate and balancing the temperature difference between the head and tail. The opened heat-insulating damper 836 forms a barrier on both sides of the bar, enhancing the heat insulation effect. By controlling the locking plates 838 in different areas, the heat insulation range can be flexibly adjusted to adapt to bars of different specifications and temperature differences. The hot air originates from the recovered air after pre-cooling in the rotary guide cylinder 440, improving energy utilization.

[0041] Working principle and usage process of this invention: S1, Bar rolling and brake feeding After casting, the bars are rolled sequentially through the roughing mill 110, the intermediate mill 120, and the finishing mill 130. Then, they are cut to length by the disc shear 140 to meet the length requirements of the subsequent cooling process. The bars then enter the water cooling machine 200 for preliminary cooling. After that, the bars pass through the fixed roll frame 310 and the moving roll clamping frame 330 of the brake machine 300. After the tail end of the bars passes through, the two sets of moving roll clamping frames 330 move towards each other along the vertical guide rail 340, clamping the bars and braking them to slow them down and enter the rotary guide cylinder 440 of the rotary guide assembly 400 in a stable and straight posture, avoiding collision damage with the cylinder wall.

[0042] S2. Online inspection, sampling, and sorting of bar stock. The bar stock first enters the receiving position 450 at the top of the rotary guide cylinder 440 and is placed in the receiving groove 441. The detection pressure head 740 of the deformation detection component 700 presses down to contact the bar stock, and the built-in pressure sensor detects whether its shape is qualified. If the detection fails, the detection pressure head 740 can press down to correct it, ensuring that the bar stock can smoothly enter the constraint ring plate 422. Subsequently, the rotary guide cylinder 440 rotates under the drive of the rotary drive motor 650, driving the bar stock through each station in sequence. Sampling position 460: If sampling is required, the plasma cutting torch 532 of the cutting sampling component 500 is activated to cut the end of the rod at the positioning point of the cutting ring groove 442. At the same time, the sampling baffle 429 is opened and the sample slides out and is collected along the receiving inclined plate 510. First unloading position 470: For qualified bars, the qualified product baffle 425 opens and the bars fall; Second unloading position 480: For bars that fail the inspection, the defective product baffle 427 is opened, and the bars are guided to the defective product temporary storage table 820 to achieve automatic sorting.

[0043] During this process, the side-blowing air assembly 600 sends cooling air into the rotary guide cylinder 440 to pre-cool the bar evenly. The hot air after heat exchange can be led out through the hot air discharge joint 660 for subsequent slow cooling and heat preservation assembly 800 to recycle.

[0044] S3, Controllable Cooling of Bars The qualified bars falling onto the cooling bed 900 are gradually transferred by the feed toothed plate 916 of the reciprocating conveyor 910 to the toothed groove of the support toothed plate 921. The actual production process is implemented as follows: Uniform cooling mode: The drive wheel 932 of the self-rotation drive component 930 drives the bar to rotate continuously. At the same time, the lower air blowing component 920 blows air from the upper air outlet 926 and the side air outlet 927 to the bar at multiple angles to ensure uniform and efficient cooling.

[0045] Zoned slow cooling mode: If the temperature difference between the head and tail of the bar is large, the system starts the slow cooling and heat preservation component 800. The recovered hot air passes through the heat preservation air box 810 and is blown in a direction by the directional air supply component 830 to the high temperature area of ​​the bar (such as the head). The heat preservation air damper 836 below this area opens to form a heat preservation barrier, which slows down the local cooling rate, thereby balancing the overall temperature of the bar and preventing deformation or cracking caused by temperature difference stress.

[0046] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A large-diameter bar rolling equipment, characterized in that, include: The rolling mill unit is arranged in sequence according to the bar conveying direction, including a roughing mill unit, an intermediate mill unit, a finishing mill unit, and a disc shear; A water-cooled cooling unit is installed at the output end of a disc shear. The brake is installed at the output end of the water-cooled machine; The rotary guide assembly includes a U-shaped support, a constraint component mounted on the top of the U-shaped support, and a rotary guide cylinder rotatably mounted inside the constraint component. The outer wall of the rotary guide cylinder has four sets of axially extending receiving grooves, with open ends at both ends. The rotary guide cylinder cyclically switches between a receiving position, a sampling position, a first unloading position, and a second unloading position. The constraint component is used to constrain the bar stock within the receiving grooves from the outside. The receiving position at the top of the rotary guide cylinder is connected to the output end of the brake. One end of the rotary guide cylinder is rotatably connected to a side-blowing assembly, which assists in reducing the temperature of the bar stock. A deformation detection assembly is installed at the receiving position of the rotary guide cylinder. The cutting and sampling assembly is installed at the sampling position on the outside of the cutting ring cylinder. The cutting and sampling assembly is used to periodically cut the end of the bar as a test sample. The cooling bed includes a reciprocating conveyor frame, the receiving end of which is located below the first unloading position at the bottom of the rotary guide cylinder; the reciprocating conveyor frame is equipped with downward blowing components at intervals, and both ends of the reciprocating conveyor frame are equipped with self-rotation drive components, which are used to drive the bar to rotate and cool, and the downward blowing components are used to blow air onto the bar to assist in cooling.

2. The large-diameter bar rolling equipment according to claim 1, characterized in that: The brake includes a fixed roller frame, a brake back plate, and a moving roller clamping frame. The brake back plate is located at the input end of the rotary guide cylinder. The moving roller clamping frames are vertically and symmetrically installed on the outer wall of the brake back plate. A vertical guide rail is installed on the back of the brake back plate. The backs of the two sets of moving roller clamping frames are slidably installed in the vertical guide rail. The fixed roller frame is installed at the input end of the brake back plate. The bar passes through the fixed roller frame and the two sets of moving roller clamping frames in sequence.

3. The large-diameter bar rolling equipment according to claim 1, characterized in that: The constraint components include side fixing rods and constraint ring plates. Multiple sets of constraint ring plates are axially spaced along the outer wall of the rotary guide cylinder. Side fixing rods are symmetrically fixed to the outer wall of each set of constraint ring plates, and U-shaped brackets are fixedly connected to both ends of the side fixing rods. A feeding notch is provided at the top receiving position of each set of constraint ring plates. A qualified product unloading notch is provided at the first unloading position of each set of constraint ring plates. A qualified product baffle is rotatably installed inside the qualified product unloading notch. The rotatable parts of each set of qualified product baffles are connected as one unit by a first rotating rod. A defective product unloading notch is provided at the second unloading position of the constraint ring plates. A defective product baffle is rotatably installed inside the defective product unloading notch. The rotatable parts of each set of defective product baffles are connected as one unit by a second rotating rod. A sampling notch is provided on the constraint ring plate located at the input end. The sampling notch is located at the sampling position, and a sampling baffle is rotatably installed inside the sampling notch.

4. The large-diameter bar rolling equipment according to claim 3, characterized in that: The sampling baffle has its rotation point at the top, where a first driven gear is installed. A cutting ring groove is formed on the outer wall of the input end of the rotary guide cylinder. The sampling area is the region between the cutting ring groove and the constraint ring plate located at the input end. The cutting and sampling assembly includes a receiving inclined plate, which is placed in the sampling area. A stop is provided at the outer end of the receiving inclined plate, and a support column is installed on the bottom surface of the stop. A fixed hanging plate is installed at one end of the stop, and a cutter drive cylinder is vertically installed on the bottom surface of the fixed hanging plate. The bottom end of the cutter drive cylinder is vertically connected to a plasma cutting torch, which faces the cutting ring groove. A telescopic guide rail is installed at the other end of the stop, and a toothed rod is slidably installed inside the telescopic guide rail. The toothed rod is engaged with the top of the first driven gear.

5. The large-diameter bar rolling equipment according to claim 1, characterized in that: The side-blowing assembly includes a cooling fan, the output end of which is connected to the main air supply pipe. A rotary air inlet connector is installed at one end of the rotary guide cylinder. A second driven gear is provided on the outer wall of the rotary air inlet connector. The second driven gear is meshed with and connected to a rotary drive motor. The rotary air inlet connector is rotatably connected to the main air supply pipe. A hot air outlet connector is installed at the other end of the rotary guide cylinder. A three-way valve is rotatably installed at the output end of the hot air outlet connector.

6. The large-diameter bar rolling equipment according to claim 1, characterized in that: The deformation detection component includes a detection frame, with a clamping drive cylinder symmetrically arranged on the bottom surface of the detection frame. The bottom end of the clamping drive cylinder is connected to a clamping crossbeam. Multiple sets of detection pressure heads are arranged opposite each other on the bottom surface of the clamping crossbeam. Each set of detection pressure heads is located above the feed notch, and a pressure sensor is embedded inside the detection pressure head. The detection pressure head descends to detect whether the shape of the bar has deformed. If deformed, the bar is pressed down and corrected by the detection pressure head to smoothly enter the constraint ring plate and is output from the second discharge position. If not deformed, the bar is output from the first discharge position.

7. The large-diameter bar rolling equipment according to claim 1, characterized in that: The reciprocating conveyor frame includes a lifting hydraulic cylinder, which is vertically arranged and has a base plate at its top. A movable slide is slidably installed on the top surface of the base plate. A horizontally arranged translation hydraulic cylinder is connected to the surface of the movable slide. Multiple sets of support rods are spaced apart on the surface of the movable slide, and each set of support rods has a feed tooth plate at its top. The down-blowing component includes a support toothed plate, air guide branches, a main air guide duct, and a cooling bed fan. The support toothed plate is located between two adjacent sets of feed toothed plates. One end of the support toothed plate is provided with a feed ramp that extends to the bottom of the first discharge position. One end of the bottom surface of the support toothed plate is provided with a support column. The outer end of the support toothed plate is vertically provided with air guide branches. Multiple sets of air guide branches are connected in parallel to the main air guide duct, which is connected to the cooling bed fan. The protruding teeth of the support toothed plate are provided with an upper exhaust hole, and the two sides of the support toothed plate are provided with side exhaust holes, which are staggered from the upper exhaust holes.

8. A large-diameter bar rolling equipment according to claim 7, characterized in that: Both ends of the reciprocating conveyor are equipped with a rotation drive component. The rotation drive component includes a rotating bracket. The top of the rotating bracket is linearly arrayed with drive wheels. The outer ends of multiple sets of drive wheels are connected to a set of drive shafts. The drive shafts are used to drive the drive wheels to rotate, thereby driving each set of bars to rotate.

9. A large-diameter bar rolling equipment according to claim 1, characterized in that: It also includes a slow cooling and heat preservation component, which includes a heat preservation air box. The heat preservation air box is located at the top of the input end of the reciprocating conveyor frame. A defective product storage platform is installed on the top surface of the heat preservation air box. The defective product storage platform is located at the second unloading position inside the rotary guide cylinder. The top surface of the heat preservation air box has a downward exhaust hole. The internal sandwich structure of the heat preservation air box is connected to a three-way valve through a flexible hose. The bottom surface of the insulated air box is equipped with a directional air supply component to output hot air to the designated insulated area of ​​the bar. The input end of the directional air supply component is rotatably connected to the other end of the rotary guide cylinder; The directional air supply component includes a third rotating rod, which is symmetrically and rotatably installed on the bottom surface of the insulated air box. Multiple sets of damper sleeves are fitted onto the outer wall of each set of third rotating rods. Insulated dampers are provided on the side walls of the damper sleeves, and radial blocks are provided on the inner walls of the damper sleeves. Locking slots are provided on the outer walls of the damper sleeves. Multiple sets of axial limiting strips are provided on the outer walls of the third rotating rods, which cooperate to stop below the radial blocks. Damper drive cylinders are symmetrically located on both sides of the insulated air box. The output end of the damper drive cylinder is connected to a locking plate, which is inserted into the locking slot. A sliding groove adapted to the rotation of the axial limiting strips is provided on the inner wall of the damper sleeve. When the locking plate disengages from the locking slot, the third rotating rod and the axial limiting strips rotate, causing the radial blocks to lose support. The insulated dampers rotate downwards under their own weight, and the two sets of insulated dampers form a containment structure in the slow-cooling and heat-insulating zone of the bar.

10. A large-diameter bar rolling process, based on the large-diameter bar rolling equipment according to any one of claims 1 to 9, characterized in that: The rolling process is as follows: S1. Bar rolling: Cast bars are rolled by roughing mill, intermediate mill, and finishing mill, and cut into appropriate cooling lengths by disc shears; after cooling by water cooling machines, the bars are output by brake machines. S2, Circular Pre-cooling Turnover: The bar stock enters the receiving position of the rotary guide cylinder, and the deformation detection component detects and corrects the shape; after detection, the rotary guide cylinder rotates, and the sampling position takes samples by plasma cutting as needed; qualified bars are rotated to the first unloading position and fall, while unqualified bars are rotated to the second unloading position and rolled into the defective product storage platform; while the rotary guide cylinder rotates, the side blowing component exhausts air and exchanges heat to achieve slow cooling of the bars; S3 Cooling Bed: The reciprocating conveyor gradually transports the bar stock, and the self-rotation drive component drives the bar stock to rotate and cool it evenly; the downward blowing component blows air on the bar stock as needed to assist in cooling; when there is a large temperature difference between the head and tail, the directional air supply component sends hot air to the head to balance the head and tail temperatures.

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