阅读说明：本技术 一种单机架轧机卸卷的方法 (Coil unloading method for single-stand rolling mill ) 是由 丁频 李宇 杨小勇 杨婧 张若男 于 2019-10-31 设计创作，主要内容包括：本发明提供了一种单机架轧机卸卷的方法,包括以下步骤,根据现场情况确定出卸卷车移动的第一减速位、第一停止位、第二减速位和第二停止位；在第一步确定的第一减速位、第一停止位、第二减速位和第二停止位上分别安装光电传感器A、B、C、D；将光电传感器A、B、C、D的信号输出端分别与卸卷车控制系统连接；将卸卷车放置在待卸钢卷的正下方,将待卸钢卷放置在卸卷车放置台的上表面；启动卸卷车,使卸卷车自动行驶至固定鞍座处,将卸卷车的放置台下降,钢卷则会落到固定鞍座上,即完成轧机卸卷过程。(The invention provides a coil unloading method for a single-stand rolling mill, which comprises the following steps of determining a first deceleration position, a first stop position, a second deceleration position and a second stop position of a coil unloading vehicle according to the field condition; installing photoelectric sensors A, B, C, D on the first deceleration position, the first stop position, the second deceleration position and the second stop position determined in the first step respectively; the signal output ends of the photoelectric sensors A, B, C, D are respectively connected with a control system of the coil stripping vehicle; placing the coil stripping vehicle right below the coil to be stripped, and placing the coil to be stripped on the upper surface of a placing table of the coil stripping vehicle; and starting the coil discharging car to enable the coil discharging car to automatically run to the fixed saddle, descending the placing platform of the coil discharging car, and enabling the steel coil to fall onto the fixed saddle, namely finishing the coil discharging process of the rolling mill.)

1. A coil stripping method for a single-stand rolling mill is characterized by comprising the following steps:

step 1, determining a first deceleration position (6), a first stop position (7), a second deceleration position (8) and a second stop position (9) of the movement of the coil unloading vehicle according to the field condition;

step 2, installing photoelectric sensors A, B, C, D on the first deceleration position (6), the first stop position (7), the second deceleration position (8) and the second stop position (9) determined in the first step respectively;

step 3, respectively connecting the signal output ends of the photoelectric sensors A, B, C, D arranged in the step 2 with a control system of the coil stripping car;

step 4, placing the coil stripping vehicle right below the steel coil to be stripped (2), and placing the steel coil to be stripped (2) on the upper surface of a placing table of the coil stripping vehicle (4);

step 5, starting the coil discharging car (4) to ensure that the coil discharging car (4) is uniformly accelerated to a speed V at an acceleration a₁Then the coil stripping vehicle (4) runs at a constant speed, and starts to uniformly decelerate to V at an acceleration-a when reaching a first deceleration position (6)₀Then the vehicle runs at a constant speed, and when the coil discharging vehicle (4) reaches the first stop position (7), the coil discharging vehicle (4) stops moving;

step 6, after the coil stripping car (4) stops, lifting the placing table of the coil stripping car (4) until the table surface of the placing table is flush with the table surface of the fixed saddle (5);

step 7, starting the coil discharging car (4) to ensure that the coil discharging car (4) is uniformly accelerated to a speed V at an acceleration a₁Then the coil stripping vehicle (4) runs at a constant speed, and starts to uniformly decelerate to V at an acceleration-a when reaching a second deceleration position (8)₀And then the steel coil (2) is dropped onto the fixed saddle (5) after the steel coil is driven at a constant speed, and when the coil unloading vehicle (4) reaches the second stop position (9), the coil unloading vehicle (4) stops moving, and the placing platform of the coil unloading vehicle (4) is lowered to the initial height.

2. A single-stand rolling mill coil-unloading method as claimed in claim 1, characterized in that said first stop (7) is located centrally between the vertical ground level of the right edge of the foundation of the fixed saddle (5) and the vertical ground level of the left edge of the mandrel (3), and said first deceleration (6) is located between the first stop (7) and the vertical ground level of the left edge of the mandrel (3).

3. A single stand rolling mill coil stripping method as claimed in claim 1, characterised in that said second stop (9) is located in the central position of the fixed saddle (5) and said second deceleration station (8) is located between the second stop (9) and the first stop (7).

4. A single stand rolling mill coil stripping method as claimed in claim 2, characterized in that the distance between the first stop (7) and the first reduction (6) is D₁，D₁＝(V₁ ²-V₀ ²)/2a+5×V₀。

5. A single stand rolling mill coil stripping method as claimed in claim 4, characterized in that the distance between the second stop (9) and the second reduction (8) is D₂Said D is₂＝D₁。

6. Method for single stand rolling mill coil stripping according to claim 4, characterized in that said speed V₁Not more than 0.1m/s, and acceleration a not more than 0.05m/s²Velocity V₀Not more than 0.03 m/s.

Technical Field

The invention belongs to the technical field of mechanical automation control, and relates to a coil unloading method for a single-stand rolling mill.

Background

In recent years, continuous rolling mills are popularized in large-scale steel mills in China, single-rack rolling mills are gradually and mainly used in private enterprises, most of the private enterprises consider equipment production lines with high automation degree, too much equipment maintenance time and maintenance cost are increased, a plurality of machine set functions are manually controlled and processed, and coil stripping is carried out by manually switching between high speed and low speed.

For example, in the civil steel works in the areas of boxing, the operators are oblivious and unskilled to hit the foundation frequently when manually unloading the coil at a high speed, or the operators cannot accurately stop on the fixed saddle to cause the coil to roll and fall into a pit, and then the operators perform slow (or visual adjustment) unloading on the premise of ensuring safety, so that the production efficiency is inevitably reduced.

Disclosure of Invention

The invention aims to provide a coil unloading method for a single-stand rolling mill, which enables the speed change of a coil unloading and coil unloading vehicle in the coil unloading process to be quantitatively controllable and to quickly and accurately reach a specified position.

The technical scheme adopted by the invention is that,

a method of single stand mill coil stripping comprising the steps of:

step 1, determining a first deceleration position, a first stop position, a second deceleration position and a second stop position of the movement of the coil unloading vehicle according to the field condition;

step 2, installing photoelectric sensors A, B, C, D on the first deceleration position, the first stop position, the second deceleration position and the second stop position determined in the first step respectively;

step 3, respectively connecting the signal output ends of the photoelectric sensors A, B, C, D arranged in the step 2 with a control system of the coil stripping car;

step 4, placing the coil stripping vehicle right below the coil to be stripped, and placing the coil to be stripped on the upper surface of the placing table of the coil stripping vehicle;

step 5, starting the coil discharging vehicle to enable the coil discharging vehicle to be uniformly accelerated to a speed V at an acceleration a₁Then the coil stripping vehicle runs at a constant speed, and when the coil stripping vehicle reaches a first deceleration position, the coil stripping vehicle starts to uniformly decelerate to V at an acceleration-a₀Then, the coil stripping vehicle runs at a constant speed, and stops moving when reaching the first stop position;

step 6, after the coil stripping car stops, lifting the placing table of the coil stripping car until the table surface of the placing table is flush with the table surface of the fixed saddle;

step 7, starting unloadingA rolling car, which makes the coil unloading car uniformly accelerate to a speed V with an acceleration a₁Then the coil stripping vehicle runs at a constant speed, and when the coil stripping vehicle reaches a second deceleration position, the coil stripping vehicle starts to uniformly decelerate to V at an acceleration-a₀And then the coil stripper car runs at a constant speed, when the coil stripper car reaches a second stop position, the coil stripper car stops moving, the placing platform of the coil stripper car is lowered to the initial height, and the steel coil falls onto the fixed saddle.

Yet another feature of the present invention is that,

the first stop position is located at the center between the vertical ground plane at the right edge of the fixed saddle foundation and the vertical ground plane at the left edge of the winding drum, and the first deceleration position is located between the first stop position and the vertical ground plane at the left edge of the winding drum.

The second stop position is located at the central position of the fixed saddle, and the second deceleration position is located between the second stop position and the first stop position.

The distance between the first stop position and the first deceleration position is D₁，D₁＝(V₁ ²-V₀ ²)/2a+5×V₀。

The distance between the second stop position and the second deceleration position is D₂，D₂＝D₁。

Velocity V₁Not more than 0.1m/s, and acceleration a not more than 0.05m/s²Velocity V₀Not more than 0.03 m/s.

The method for single-stand rolling mill coil unloading has the advantages that the problem that in the conventional single-stand rolling mill manual high-speed coil unloading method, the condition that an operator cannot pay attention to the method, the operator is unskilled and often collides with a foundation, or the operator cannot accurately stop on a fixed saddle to cause coil overturning and falling into a pit is solved, the equipment accident rate is reduced, and the production efficiency is greatly improved.

Drawings

FIG. 1 is a schematic view of a single stand rolling mill coil stripping method embodiment of the present invention;

FIG. 2 is a schematic diagram showing the change of the speed of the coil stripping car during coil stripping by the coil stripping method of the single-stand rolling mill.

In the figure, 1, a reduction gearbox, 2, a steel coil, 3, a winding drum, 4, a coil stripping trolley, 5, a fixed saddle, 6, a first speed reduction position, 7, a first stop position, 8, a second speed reduction position, 9, a second stop position, 10, a speed reduction position and 11, stop positions.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

The invention provides a coil stripping method for a single-stand rolling mill, which comprises the following steps:

step 1, determining a first deceleration position 6, a first stop position 7, a second deceleration position 8 and a second stop position 9 of the moving coil unloading vehicle according to the field condition;

step 2, installing photoelectric sensors A, B, C, D on the first deceleration position 6, the first stop position 7, the second deceleration position 8 and the second stop position 9 determined in the first step respectively;

step 3, respectively connecting the signal output ends of the photoelectric sensors A, B, C, D arranged in the step 2 with a control system of the coil stripping car;

step 4, placing the coil stripping vehicle right below the steel coil to be stripped 2, and placing the steel coil to be stripped 2 on the upper surface of a placing table of the coil stripping vehicle 4;

step 5, starting the coil discharging car 4 to ensure that the coil discharging car 4 is uniformly accelerated to a speed V at an acceleration a₁Then the coil stripping car 4 starts to uniformly decelerate to V at the acceleration-a when reaching the first deceleration position 6₀Then, the coil stripper car 4 runs at a constant speed, and when the coil stripper car 4 reaches the first stop position 7, the coil stripper car 4 stops moving;

step 6, after the coil stripping car 4 stops, lifting the placing table of the coil stripping car 4 until the table surface of the placing table is flush with the table surface of the fixed saddle 5;

step 7, starting the coil discharging car 4 to ensure that the coil discharging car 4 is uniformly accelerated to a speed V at an acceleration a₁Then the coil stripping car 4 starts to uniformly decelerate to V at the acceleration-a when reaching the second deceleration position 8₀Then, the steel coil 2 runs at a constant speed, when the coil unloading car 4 reaches the second stop position 9, the coil unloading car 4 stops moving, the placing platform of the coil unloading car 4 is lowered to the initial height, and the steel coil 2 falls on the fixed saddle 5.

The first stop position 7 is positioned between the vertical ground plane at the right edge of the foundation of the fixed saddle 5 and the vertical ground plane at the left edge of the winding drum 3In the centre position, the first deceleration position 6 is located between the first stop 7 and the vertical ground level of the left edge of the reel 3. The distance between the first stop position 7 and the first deceleration position 6 is D₁，D₁＝(V₁ ²-V₀ ²)/2a+5×V₀。

The second stop 9 is located in the central position of the fixed saddle 5 and the second reduction 8 is located between the second stop 9 and the first stop 7. The distance between the second stop position 9 and the second decelerating position 8 is D₂，D₂＝D₁。

Velocity V₁Not more than 0.1m/s, and acceleration a not more than 0.05m/s²Velocity V₀Not more than 0.03 m/s.

As shown in fig. 1, in the initial state, the coil discharging car 4 is located right below the coil 2 to be discharged, the coil 2 is placed on the placing table of the coil discharging car 4, and then the coil discharging car 4 is started to accelerate the coil discharging car 4 to a speed V at an acceleration a₁Then at a speed V₁The constant-speed running is carried out, when the coil stripping car 4 runs to the first deceleration position 6, the photoelectric sensor A detects the coil stripping car 4 and transmits a detection signal to the coil stripping car control system, and the coil stripping car control system controls the coil stripping car to start to decelerate to a speed V not exceeding 0.03m/s at an acceleration-a₀Then at a speed V₀And (3) running at a constant speed, wherein when the coil stripping car 4 runs to the first stop position 7, the photoelectric sensor B detects the coil stripping car 4, transmits a detected signal to the coil stripping car control system, and controls the coil stripping car 4 to decelerate to stop by the coil stripping car control system. Then, the platform of the unwinder 4 starts to rise, and stops rising when the upper surface of the platform is flush with the upper surface of the fixed saddle 5. The unwinder 4 is restarted and accelerated to speed V at acceleration a₁Then at a speed V₁The coil stripping car 4 is detected by the photoelectric sensor C when the coil stripping car 4 runs to the second deceleration position 8, and the detection signal is transmitted to the coil stripping car control system, and the coil stripping car control system controls the coil stripping car to start to decelerate to a speed V not exceeding 0.03m/s with an acceleration-a₀Then at a speed V₀The coil stripping car 4 runs at a constant speed, when the coil stripping car 4 runs to the second stop position 9, the photoelectric sensor D detects the coil stripping car 4 and sends the coil stripping car to the second stop positionThe detected signal is transmitted to the coil stripping car control system, the coil stripping car control system controls the coil stripping car 4 to decelerate to stop, at the moment, the coil stripping car 4 moves to the position of the fixed saddle 5, the placing platform of the coil stripping car 4 descends, the steel coil 2 falls on the upper surface of the fixed saddle 5, and the coil stripping process of the rolling mill can be completed.

As shown in FIG. 2, the change of the speed of the unwinder 4 is first accelerated to a speed V at an acceleration a₁Then at a speed V₁The vehicle runs to a deceleration position 10 at a constant speed and then decelerates to a speed V at an acceleration-a₀At a speed V₀And rapidly decelerating to a stop state after the vehicle runs to the stop position.