A workpiece collecting system and a control method thereof

Abstract

This invention discloses a rolled piece collection system and its control method, belonging to the technical field of steel rolling equipment. The system includes a first brake roller, a second brake roller, a hub reducer, and a hub. The second brake roller has a smaller diameter than the first brake roller and is located inside the hub. It is independently driven by a servo motor and supports constant pressure closed-loop control. The control method is as follows: After the head of the rolled piece enters the hub, the first brake roller clamps it according to a preset lead rate. After the disc shear completes shearing or the tail steel is finished and discarded, the braking process begins: the system calculates the braking starting point position. Before the tail steel reaches the braking starting point, the first brake roller clamps it at a synchronous speed. After the tail steel reaches the braking starting point, the first brake roller performs initial deceleration according to a preset curve. When the rolled piece speed drops to a set threshold and the tail steel has not yet detached from the first brake roller, the second brake roller completes linear speed pre-synchronization and quickly presses down to make smooth contact with the rolled piece. After the tail steel detaches from the first brake roller, the second brake roller independently brakes to precisely stop the rolled piece, then lifts it up, and the hub rotates to complete the collection. This invention solves the problems of inefficiency and inaccurate stopping points caused by the free sliding of the rolled piece after detaching from the first brake roller during the traditional braking process.

Description

Technical Field

[0001] This invention relates to the field of metal rolling technology, specifically to a control method and system for the tail-end steel loading, braking and collection processes of a high-speed bar production line, which is a micro-braking roller integrated at the end of the rotating hub and its coordinated control method. Background Technology

[0002] On high-speed bar production lines, after final rolling, the rolled stock needs to be fed into the rotating drum via the loading system for collection. Currently, the mainstream approach involves placing one or more brake rollers 1 to 3 meters in front of the drum. After being decelerated by the brake rollers, the rolled stock is thrown into the drum and slides to a stop due to friction with the drum. This "brake-slide" mode has a fundamental flaw: the completion point of the braking action (the rolled stock leaving the front brake roller) and the final stopping point of the rolled stock (within the drum) are separated in time and space, with an inefficient and uncontrollable free-slide section in between. This sliding deceleration is slow and time-consuming, severely restricting the rolling rhythm and becoming a key bottleneck preventing the production line speed from exceeding 40 m / s and moving towards 60 m / s.

[0003] In existing technologies, even if dual brake rollers are used, it is only an addition of the front braking capacity and does not change the basic pattern of "braking first, coasting to stop later", thus failing to solve this fundamental problem. Summary of the Invention

[0004] This invention aims to solve the problem of inefficient free sliding segment of existing rolled products within the drum, and to unify the end point of braking action with the end point of stopping, thereby reducing the stopping time by an order of magnitude and providing core technology for significantly improving rolling speed.

[0005] To address the aforementioned technical problems, this invention proposes a control method for a rolled piece collection system. The rolled piece collection system includes a first brake roller, a second brake roller, a hub reducer, and a hub. The control method includes: S1. Monitor the speed of the rolled piece. When the speed of the rolled piece drops to the set threshold, the tail of the rolled piece has not detached from the first brake roller. The linear speed of the first brake roller is the first speed. The second brake roller speeds up. When the linear speed of the second brake roller reaches the second speed, the system controls the second brake roller to press down and make smooth contact with the rolled piece in a constant pressure mode. S2. The tail of the rolled piece disengages from the first brake roller, and the second brake roller independently brakes the rolled piece; S3. When the workpiece speed drops to 0, the second brake roller lifts, and the hub completes workpiece collection. According to a preferred embodiment of the present invention, the control method further includes: S0. The head of the rolled piece enters the hub area, the first brake roller presses down, and the rolled piece is clamped according to the preset lead rate; after the disc shear is completed or the steel is polished and discarded, the system monitors the tail of the rolled piece. When the tail of the rolled piece reaches the preset deceleration point, the first brake roller performs primary deceleration according to the preset first curve. The preset lead rate is 1.03 to 1.05, and the preset curve is a uniform deceleration straight line.

[0006] According to a preferred embodiment of the present invention, if the disc shearing is not completed, or the tail steel is not discarded during finishing rolling, the first brake roller continues to clamp and feed the rolled piece.

[0007] According to a preferred embodiment of the present invention, the set threshold is 15 m / s.

[0008] According to a preferred embodiment of the present invention, the second speed is faster than the first speed.

[0009] According to a preferred embodiment of the present invention, the tail of the rolled piece disengages from the first brake roller, and the second brake roller independently brakes the rolled piece. Specifically, the system monitors whether the tail of the rolled piece disengages from the first brake roller. If it does not disengage from the first brake roller, the second brake roller maintains a constant pressure contact state and its speed decreases proportionally to the speed of the first brake roller. If the tail of the rolled piece is detected to disengage from the first brake roller, the second brake roller brakes according to a preset second curve.

[0010] The present invention also provides a rolled piece collection system, including a first brake roller, a second brake roller and a rotating hub, wherein the first brake roller is located upstream of the rotating hub and is used for primary deceleration of the rolled piece; The hub reducer is used to drive the hub to rotate, and the hub is used to guide the rolled workpiece, completing the guide, sliding and stopping of the rolled workpiece; The diameter of the second brake roller is smaller than that of the first brake roller, and the second brake roller is located inside the hub or in front of the hub.

[0011] According to a preferred embodiment of the present invention, the diameter of the second brake roller is 80 mm to 200 mm.

[0012] According to a preferred embodiment of the present invention, the second brake roller is independently driven by a servo motor, and the second brake roller is equipped with a pressure sensor to support constant pressure closed-loop control.

[0013] According to a preferred embodiment of the present invention, the second brake roller may be disposed at the head of the hub, after the hub reducer, or in front of the hub reducer.

[0014] By adopting this technical solution, the efficiency of workpiece collection is greatly improved. The time from when the workpiece leaves the brake roll to when it stops in the turntable is reduced from more than 1.4 seconds to 0.2-0.4 seconds, saving about 1.0-1.2 seconds per rolling cycle, making it possible to increase the rolling speed from 40 m / s to 60 m / s. Attached Figure Description

[0015] To make the technical problems solved by this invention, the technical means adopted, and the technical effects achieved clearer, specific embodiments of this invention will be described in detail below with reference to the accompanying drawings. However, it should be noted that the drawings described below are merely drawings of exemplary embodiments of this invention. Those skilled in the art can obtain drawings of other embodiments based on these drawings without any creative effort.

[0016] Figure 1 This is a flowchart of the control method for the rolled piece collection system in an embodiment of the present invention. Detailed Implementation

[0017] Exemplary embodiments of the invention will now be described more fully with reference to the accompanying drawings. While these exemplary embodiments can be implemented in various specific ways, they should not be construed as limiting the invention to the embodiments set forth herein. Rather, these exemplary embodiments are provided to make the content of the invention more complete and to facilitate a full communication of the inventive concept to those skilled in the art.

[0018] Subject to the inventive concept, the structures, performance, effects or other features described in a particular embodiment may be combined in any suitable manner with one or more other embodiments.

[0019] In the description of specific embodiments, detailed descriptions of structures, performance, effects, or other features are provided to enable those skilled in the art to fully understand the embodiments. However, this does not preclude those skilled in the art from implementing the present invention with technical solutions that do not contain the aforementioned structures, performance, effects, or other features under specific circumstances.

[0020] The flowcharts in the accompanying drawings are merely illustrative examples and do not imply that the solution of this invention must include all the content, operations, and steps shown in the flowcharts, nor do they imply that the execution must be performed in the order shown in the diagrams. For example, some operations / steps in the flowcharts can be decomposed, some operations / steps can be combined or partially combined, etc. Without departing from the inventive spirit of this invention, the execution order shown in the flowcharts can be changed according to the actual situation.

[0021] The box in the attached diagram Figure 1 Generally, these refer to functional entities, and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processing unit devices and / or microcontroller devices.

[0022] The same reference numerals in the accompanying drawings denote the same or similar elements, components, or parts, and therefore, repeated descriptions of the same or similar elements, components, or parts may be omitted below. It should also be understood that although terms such as first, second, third, etc., indicating numbers may be used herein to describe various devices, elements, components, or parts, these devices, elements, components, or parts should not be limited by these terms. That is, these terms are only used to distinguish one from another. For example, a first device may also be referred to as a second device, without departing from the essential technical solution of the invention. Furthermore, the terms "and / or" and "and / or" refer to all combinations including any one or more of the listed items.

[0023] Figure 1 This is a flowchart of a control method for a rolled piece collection system according to the present invention, as shown below. Figure 1 As shown. This invention provides a control method for a rolled steel collection system. The rolled steel collection system includes a first brake roller, a second brake roller, a hub reducer, and a hub. The control method includes: S0. When the head of the rolled piece enters the hub area, the first brake roller presses down and the rolled piece is clamped according to the preset advance rate. After the disc shearing is completed or (for tail steel) the steel is thrown out by the finishing mill, the system monitors the tail of the rolled piece. When the tail of the rolled piece reaches the preset deceleration point, the first brake roller performs primary deceleration according to the preset first curve. S1. When the speed of the workpiece drops to the set threshold, the tail of the workpiece does not detach from the first brake roller. The linear speed of the first brake roller is the first speed. The second brake roller speeds up. When the linear speed of the second brake roller reaches the second speed, the system controls the second brake roller to press down and make smooth contact with the workpiece in a constant pressure mode. S2. The tail of the rolled piece disengages from the first brake roller, and the second brake roller independently brakes the rolled piece; S3. When the speed of the rolled piece drops to 0, the second brake roller is lifted, and the hub completes the collection of the rolled piece.

[0024] Specifically: S0. Rolled Workpiece Introduction and Pre-clamping: The rolled workpiece enters the steel loading area at a preset speed (e.g., 60 m / s in the embodiment). The system accurately tracks the head position of the rolled workpiece by integrating the speed of the pre-clamping roller and verifying the thermal detection signal. When it is determined that the head of the rolled workpiece has completely passed the first brake roller and entered the hub introduction area, the first brake roller performs a pressing action, making close contact with the surface of the rolled workpiece. Then, according to the preset lead rate (e.g., 1.03, exceeding the rolling line speed by 3%) and the preset torque limit, the rolled workpiece is smoothly clamped to prevent the rolled workpiece from slipping or bending.

[0025] Deceleration trigger judgment: The system monitors the shearing status of the upstream disc shear and the position of the tail steel in real time. If the disc shear has not completed shearing or the tail steel has not reached the preset detection position, the first brake roller continues to clamp and feed. If the disc shear shear completion signal is detected or the tail steel is thrown out during finishing rolling, the subsequent deceleration process is entered.

[0026] S1. Primary Deceleration Execution: After the disc shearing is completed or (for tail steel) after finishing rolling and steel throwing, the system accurately tracks the tail position of the rolled piece based on the rotation speed of the first brake roller. When the tail of the rolled piece moves to the preset deceleration point, the first brake roller performs primary deceleration according to the preset uniform deceleration linear motion, gradually reducing the speed of the rolled piece. The acceleration of the uniform deceleration linear motion varies depending on the production specifications and the speed of the last stand on the production line.

[0027] Second Brake Roller Pre-synchronization and Pressing: Continuously monitor the workpiece speed. When the workpiece speed drops to a set threshold (e.g., 15 m / s, within the effective working range of the second brake roll, which can be adjusted according to workpiece parameters), and the tail of the workpiece has not yet disengaged from the first brake roll, the first brake roll continues to decelerate according to a preset curve, and the second brake roll initiates a speed-up program. When the second brake roll speed reaches a preset value (1.005-1.02 times the speed of the first brake roll to ensure dynamic synchronization), speed pre-synchronization is completed. 50 milliseconds before pre-synchronization is complete, the control system sends a clamping command to the second brake roll servo actuator. Within 50 milliseconds, the second brake roll completes a 3-5 mm stroke press. Near the end of the stroke, it initiates constant pressure closed-loop control with a pressure of 10000-15000 N to ensure smooth contact with the workpiece and avoid damage.

[0028] S2. Braking handover and independent braking: The system continuously monitors the relative position of the tail of the rolled piece and the first brake roller through precise position calculation. If the tail of the rolled piece has not disengaged from the first brake roller, the second brake roller maintains a constant pressure contact state and runs synchronously with the rolled piece (with a lead of 0.005-0.02). If it is detected that the tail of the rolled piece has completely disengaged from the first brake roller, the second brake roller immediately takes over the braking task independently. According to the preset end braking curve, the speed of the rolled piece is smoothly reduced to zero within a braking distance of 0.2-0.4 seconds and about 2.25 meters, achieving precise stopping.

[0029] S3. Reset and Rolled Part Collection: When the system detects that the rolled part speed has dropped to zero, the second brake roller is quickly lifted within 50-100 milliseconds; then the hub reducer drives the hub to rotate 90 degrees, unloading the rolled part to the downstream cooling bed collection platform. A single rolled part collection cycle is completed, the system is reset, and waits for the next rolled part to enter, repeating the above process.

[0030] Another embodiment of the present invention provides a rolled piece collection system, comprising a first brake roller, a second brake roller, and a rotating hub, characterized in that: The first brake roller is located upstream of the hub and is used for primary deceleration of the rolled workpiece; The hub reducer is used to drive the hub to rotate, and the hub is used to guide the rolled workpiece, completing the guide, sliding and stopping of the rolled workpiece; The second brake roller has a smaller diameter than the first brake roller, and the second brake roller is located inside the hub (or in front of the hub).

[0031] The core of this invention lies in providing a rolled piece collection system and its control method. Through the coordinated operation of dual brake rollers, it achieves smooth clamping, graded deceleration, and precise braking of rolled pieces, solving the technical problems of inaccurate braking, easy damage to rolled pieces, and low collection efficiency in the traditional rolled piece collection process. It is applicable to rolled piece collection operations in various steel rolling production lines.

[0032] Example 1: Structure of the rolled piece collection system This embodiment provides a rolled product collection system, the specific structure of which is as follows: The rolled piece collection system includes a first brake roller, a second brake roller, a hub reducer, and a hub. The connection relationships and structural parameters of each component are as follows: 1. First brake roller: Located upstream of the rotating hub, corresponding to the workpiece conveying direction, it is mainly used to clamp and initially decelerate the workpiece before it enters the rotating hub, ensuring that the workpiece enters the rotating hub smoothly; its structure is adapted to the workpiece conveying requirements, has a reliable pressing mechanism, and can achieve close contact with the workpiece surface, meeting the functional requirements of clamping and initial deceleration.

[0033] 2. Second brake roller: Its diameter is smaller than that of the first brake roller, specifically 150mm (within the preferred range of 100mm to 180mm, between 80mm and 200mm), to adapt to the braking requirements of different specifications of rolled pieces, taking into account both braking efficiency and surface protection of rolled pieces; the second brake roller is fixedly installed inside the rotating drum, specifically at the head of the rotating drum, to ensure precise docking with the rolled piece and achieve efficient braking.

[0034] The second brake roller is independently driven by a servo motor, which has a closed-loop speed control function, enabling rapid speed adjustment and precise control. It can quickly respond to the speed adjustment commands of the control system and achieve speed synchronization with the first brake roller. At the same time, a pressure sensor is installed on the pressing mechanism of the second brake roller. The pressure sensor is connected to the control system and supports constant pressure closed-loop control. It can provide real-time feedback on the contact pressure between the second brake roller and the workpiece and make dynamic adjustments through the control system to avoid excessive pressure damaging the workpiece or insufficient pressure causing brake failure.

[0035] 3. Rotary hub reducer and rotary hub: The rotary hub reducer is connected to the rotary hub drive and is used to drive the rotary hub to rotate smoothly at a preset speed; the rotary hub is equipped with a workpiece guide structure to realize the introduction, sliding and stopping of the workpiece and complete the collection operation of the workpiece; the rotary hub can rotate 90 degrees under the drive of the rotary hub reducer to realize the unloading operation of the workpiece and unload the workpiece to the downstream cooling bed collection platform.

[0036] In addition, the system also includes a core PLC control system, thermal sensors, and a speed detection module. The core PLC is used to receive feedback signals from each sensor and execute the detection, judgment, and control of the entire workpiece collection process according to a preset algorithm to achieve automated operation. The thermal sensors are used to verify the head and tail positions of the workpiece, and the speed detection module is used to detect the actual rotation speed of the first and second brake rollers in real time and accurately calculate the workpiece speed.

[0037] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the present invention is not inherently related to any specific computer, virtual device, or electronic device, and various general-purpose devices can also implement the present invention. The above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A control method for a rolled steel collection system, the rolled steel collection system comprising a first brake roller, a second brake roller, a hub reducer, and a hub, the control method comprising: S1. Monitor the speed of the rolled piece. When the speed of the rolled piece drops to the set threshold, the tail of the rolled piece has not detached from the first brake roller. The linear speed of the first brake roller is the first speed. The second brake roller speeds up. When the linear speed of the second brake roller reaches the second speed, the system controls the second brake roller to press down and make smooth contact with the rolled piece in a constant pressure mode. S2. The tail of the rolled piece disengages from the first brake roller, and the second brake roller independently brakes the rolled piece; S3. When the speed of the rolled piece drops to 0, the second brake roller is lifted, and the hub completes the collection of the rolled piece.

2. The control method as described in claim 1, characterized in that, The control method further includes: S0. The head of the rolled piece enters the hub area, the first brake roller presses down, and the rolled piece is clamped according to the preset lead rate; after the disc shear is completed or the tail steel is finished and thrown, the system monitors the tail of the rolled piece. When the tail of the rolled piece reaches the preset deceleration point, the first brake roller performs primary deceleration according to the preset first curve. The preset lead rate is 1.03 to 1.05, and the preset curve is a uniform deceleration straight line.

3. The control method as described in claim 2, characterized in that, If the disc shearing is not completed or the tail steel has not arrived, the first brake roller continues to clamp and feed the rolled piece.

4. The control method as described in claim 2, characterized in that, The set threshold is 15 m / s.

5. The control method as described in claim 4, characterized in that, The second speed is faster than the first speed.

6. The control method as described in claim 2, characterized in that, The tail of the rolled piece disengages from the first brake roller, and the second brake roller independently brakes the rolled piece. Specifically, the system monitors whether the tail of the rolled piece disengages from the first brake roller. If it does not disengage from the first brake roller, the second brake roller maintains a constant pressure contact state and its speed decreases proportionally to the speed of the first brake roller. If the tail of the rolled piece is detected to disengage from the first brake roller, the second brake roller brakes according to a preset second curve.

7. A rolled product collection system, comprising a first brake roller, a second brake roller, and a rotating hub, characterized in that: The first brake roller is located upstream of the hub and is used for primary deceleration of the rolled workpiece; The hub reducer is used to drive the hub to rotate, and the hub is used to guide the rolled workpiece, completing the guide, sliding and stopping of the rolled workpiece; The diameter of the second brake roller is smaller than that of the first brake roller, and the second brake roller is located inside the hub or in front of the hub.

8. The rolled piece collection system as described in claim 7, characterized in that, The diameter of the second brake roller is 80mm to 200mm.

9. The rolled piece collection system as described in claim 7, characterized in that, The second brake roller is driven independently by a servo motor and is equipped with a pressure sensor to support constant pressure closed-loop control.

10. The rolled piece collection system as described in claim 7, characterized in that, The second brake roller can be located at the head of the hub, after the hub reducer, or in front of the hub reducer.

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