阅读说明：本技术 一种立式连铸钢坯长度测量零点定位方法 (Zero point positioning method for vertical continuous casting billet length measurement ) 是由 李志宏 马莹 刘文飞 牛小芳 于 2021-08-06 设计创作，主要内容包括：本发明属于立式连铸钢坯长度测量技术领域,具体技术方案为：一种立式连铸钢坯长度测量零点定位方法,设置一高性能可编程控制器,测量轮编码器测得的下行钢坯长度脉冲,送至高性能可编程控制器内置的高速计数模块,进而根据预置参数,自动计算出钢坯定尺长度实测值,由切割大车编码器测得切割大车下行或提升时的位移脉冲信号,并传给高性能可编程控制器内置的高速计数模块,从而在高性能可编程控制器里,根据预置参数,自动计算出切割大车的位置,钢坯定尺长度最终值为钢坯定尺长度实测值与切割大车位置值之差,本发明避免了正常生产切割过程中,重新改变切割位置时,导致下一块钢坯切割切割长度发生错误,甚至引起生产紊乱的问题。(The invention belongs to the technical field of vertical continuous casting billet length measurement, and the specific technical scheme is as follows: a zero-point positioning method for measuring the length of vertical continuous casting billet features that a high-performance programmable controller is used, the pulse of the length of down-going billet measured by encoder of measuring wheel is sent to high-speed counter module in said programmable controller, further automatically calculating the length-fixed measured value of the billet according to the preset parameters, measuring the displacement pulse signal when the cutting cart descends or ascends by the encoder of the cutting cart, and transmits the data to a high-speed counting module arranged in the high-performance programmable controller, so that in the high-performance programmable controller, according to the preset parameters, the position of the cutting cart is automatically calculated, and the final value of the specified length of the billet is the difference between the measured value of the specified length of the billet and the position value of the cutting cart, the cutting length of the next steel billet is wrong, and even the production disorder is caused.)

1. A method for positioning zero point of vertical continuous casting billet length measurement is characterized by comprising the following steps:

firstly, a measuring wheel encoder measures length pulse of a descending steel billet and sends the length pulse to a high-speed counting module arranged in a high-performance programmable controller, then a steel billet fixed length measured value is automatically calculated according to preset parameters, a cutting cart encoder measures a displacement pulse signal when a cutting cart descends or ascends and sends the displacement pulse signal to the high-performance programmable controller arranged in the high-performance programmable controller, and the position of the cutting cart is automatically calculated in the high-performance programmable controller according to the preset parameters;

secondly, calculating a final value of the specified length of the billet, wherein a specific calculation formula is as follows:

final value of steel billet fixed length = measured value of steel billet fixed length-position value of cutting cart

When the steel billet is cut in normal production, the measuring wheel encoder and the cutting cart encoder reset simultaneously at the moment when the clamping arm clamps the steel billet to prepare for cutting, and counting is started from zero;

in the cutting process, the steel billet and the cutting cart synchronously and vertically descend, the pulse data of the measuring wheel encoder and the pulse data of the cutting cart encoder are completely the same, and the final value of the fixed length of the steel billet is always zero;

after cutting, the cutting cart quickly returns to the cart zero position from the lowest position, the final value of the fixed length of the billet is quickly changed from zero to the measured value of the fixed length of the billet below the horizontal position of the cutting gun, the position value of the cutting cart is zero, and the final value of the fixed length of the billet gradually increases along with the descending of the billet to wait for entering the next cutting cycle.

2. The method of claim 1, wherein before cutting, if cutting is stopped in an emergency, the cutting position is defined as a, the length of the billet is determined as L1, and when the cutting position is changed again, the cart is manually moved to a new position, the cutting position is defined as B, the cutting cart position is L2, i.e. the cutting cart zero error L2 is generated due to the reselection of the cutting position, cutting is started, and the measuring wheel encoder and the cutting cart encoder are simultaneously reset to count from zero at the moment when the clamping arm clamps the billet to be cut; in the cutting process, the steel billet and the cutting cart synchronously and vertically descend, the pulse data of the measuring wheel encoder and the pulse data of the cutting cart encoder are completely consistent, and the final value of the fixed length of the steel billet is always zero; after cutting, in the process that the cutting cart quickly returns to the cart zero position from the lowest position, the position value of the cutting cart is reduced to zero from the position value when the steel billet is cut off, and then is reduced to-L2 from zero, the final value of the steel billet fixed length is quickly changed to the actual value of the steel billet fixed length below the horizontal position of the cutting gun from zero, the position value of the cutting cart is kept to be-L2, the final value of the steel billet fixed length = the actual value of the steel billet fixed length- (-L2), namely the final value of the steel billet fixed length = the actual value of the steel billet fixed length + L2, therefore, the zero position error L2 of the cutting cart generated due to reselecting the cutting position is automatically compensated, the final value of the steel billet fixed length gradually increases along with the descending of the steel billet, and the next cutting cycle is waited to enter.

Technical Field

The invention belongs to the technical field of vertical continuous casting billet length measurement, and particularly relates to a zero point positioning method for vertical continuous casting billet length measurement.

Background

At present, in the production of vertical continuous casting billets, a method of measuring the length of the billets adopts a measuring wheel and an encoder, the measuring wheel tightly leans against the surface of the billets, the measuring wheel synchronously rotates along with the descending of the billets, the measuring wheel drives the measuring wheel encoder to synchronously rotate through a rotating shaft, so that the length pulse of the descending billets is measured, the pulse is sent to a high-speed counting module arranged in a high-performance programmable controller, further, the measured value of the length of the specified length of the billets is automatically calculated according to preset parameters, and the length is sent to an operation panel for displaying.

When the measured value of the fixed length of the steel billet reaches the planned fixed length, the measured value of the fixed length of the steel billet is reset, meanwhile, the two ends of the steel billet are clamped by the clamping arms, the cutting cart integrated with the clamping arms synchronously descends along with the steel billet from the highest position, namely the zero position, to cut. During the cutting process, the measured value of the fixed length of the billet starts to be measured again from zero until the billet is cut off and then the measurement is continued. After the billet is cut off, the cutting cart is lifted at full speed and returns to the zero position. Obviously, the zero position of the cutting cart is the zero point of the measured length value of the specified length of the billet. If the billet is changed in production or an operator finds that the cutting position is wrong before cutting, the cutting position needs to be changed again, and although the length of the billet in the current block meets the production requirement, the cutting length of the next billet is wrong, and even the production disorder problem is caused.

Disclosure of Invention

In order to solve the technical problems in the prior art, the invention provides the zero point positioning method for the length measurement of the vertical continuous casting billet, which has high positioning precision and ensures continuous and stable operation of production.

In the process of cutting the vertical continuous casting billet, the cutting guns are integrally installed on the cutting cart, and the next billet to be cut is always positioned above the horizontal line of the cutting guns along with the synchronous descending of the billet. Therefore, the horizontal position of the cutting gun is always determined to be the zero point of the measured billet length, namely, the horizontal position of the cutting gun is always the zero point of the measured billet length no matter what position of the cutting cart is in the vertical direction. During the cutting process, the measured value of the specified length of the billet is always zero.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a zero point positioning method for measuring the length of vertical continuous casting billet is characterized in that a high-performance programmable controller is arranged, a descending billet length pulse measured by a measuring wheel encoder is sent to a high-speed counting module arranged in the high-performance programmable controller, a billet length measuring value is automatically calculated according to preset parameters, a displacement pulse signal when a cutting cart descends or ascends is measured by a cutting cart encoder and is transmitted to the high-speed counting module arranged in the high-performance programmable controller, and therefore the position of the cutting cart is automatically calculated in the high-performance programmable controller according to the preset parameters.

The final value of the specified length of the billet = the measured value of the specified length of the billet-the position value of the cutting cart.

The measured value of the specified length of the billet, the position value of the cutting cart and the final value of the specified length of the billet are sent to an operation panel for displaying.

When the steel billet is normally produced and cut, the measuring wheel encoder and the cutting cart encoder reset simultaneously at the moment that the clamping arms clamp the steel billet to prepare for cutting, and counting is started from zero. In the cutting process, the steel billet and the cutting cart synchronously and vertically descend, the pulse data of the measuring wheel encoder and the pulse data of the cutting cart encoder are completely the same, and the final value of the fixed length of the steel billet is always zero. After cutting, the cutting cart quickly returns to the cart zero position from the lowest position, the final value of the fixed length of the billet is quickly changed from zero to the measured value of the fixed length of the billet below the horizontal position of the cutting gun, the position value of the cutting cart is zero, the final value of the fixed length of the billet = the measured value of the fixed length of the billet, and the final value of the fixed length of the billet is gradually increased along with the descending of the billet to wait for entering the next cutting cycle.

If the production is changed or the operator finds the cutting error position before cutting off (at this time, the cutting position is A, and the measured value of the billet length is L1), the continuous cutting is stopped, when the cutting position is changed again, the cart is manually driven to a new position (the cutting position is B, the cutting cart position value is L2, namely, the cutting cart zero error L2 is generated due to the reselection of the cutting position), the cutting is started, and at the moment that the clamping arm clamps the billet to prepare for cutting, the measuring wheel encoder and the cutting cart encoder are simultaneously reset, and the counting is started from zero. In the cutting process, the steel billet and the cutting cart synchronously and vertically descend, the pulse data of the measuring wheel encoder and the pulse data of the cutting cart encoder are completely the same, and the final value of the fixed length of the steel billet is always zero. After cutting, in the process that the cutting cart quickly returns to the cart zero position from the lowest position, the position value of the cutting cart is reduced to zero from the position value when the steel billet is cut off, and then is reduced to-L2 from zero, the final value of the steel billet fixed length is quickly changed to the measured value of the steel billet fixed length below the horizontal position of the cutting gun from zero, and then the position value of the cutting cart is kept to be-L2, and the final value of the steel billet fixed length = the measured value of the steel billet fixed length- (-L2), namely the final value of the steel billet fixed length = the measured value of the steel billet fixed length + L2, so that the zero position error L2 of the cutting cart generated by reselecting the cutting position is automatically compensated. The final value of the fixed length of the steel billet is gradually increased along with the descending of the steel billet and waits for entering the next cutting cycle.

Therefore, no matter the cutting is carried out in normal production, or the cutting position is changed again, in the whole production process, the horizontal position of the cutting gun is always the zero point of the measured value of the specified length of the billet. Therefore, the problem that the cutting length of the next steel billet is wrong or even production disorder is caused when the cutting position is changed again in the normal production cutting process is solved.

Drawings

FIG. 1 shows a vertical continuous casting billet length measuring apparatus.

Fig. 2 is a schematic diagram of the cutting position changing again when the vertical continuous casting billet is cut.

FIG. 3 is a schematic diagram of zero point positioning logic for vertical continuous casting billet length measurement.

In the figure, 1 is an S7-1500 programmable controller, 2 is a measuring wheel, 3 is a measuring wheel encoder, 4 is a cutting cart, 5 is a cutting cart encoder, and 6 is an MP277 operating panel.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example one

As shown in fig. 1 and fig. 3, a high performance S7-1500 plc 1 is provided, and the length pulse of the downstream billet measured by the accessory measuring wheel encoder 3 of the measuring wheel 2 is sent to the high speed counting module built in the high performance S7-1500 plc 1, so as to automatically calculate the length measurement value of the specified length of the billet according to the preset parameters. The displacement pulse signal when the cutting cart descends or ascends is measured by the accessory cutting cart encoder 5 of the cutting cart 4 and is transmitted to the high-speed counting module arranged in the high-performance S7-1500 programmable controller 1, so that the position of the cutting cart 4 is automatically calculated in the high-performance S7-1500 programmable controller 1 according to preset parameters.

The final value of the specified length of the billet = the measured value of the specified length of the billet-the position value of the cutting cart.

The actual measurement value range of the billet fixed length is as follows: 0-10 m.

Cutting cart position value: 0-2.5 m.

The final value of the billet length at definite length is as follows: 0-10 m.

The measured value of the specified length of the billet, the position value of the cutting cart and the final value of the specified length of the billet are sent to the MP277 operating panel 6 for display.

When the steel billet is normally produced and cut, the measuring wheel encoder and the cutting cart encoder reset simultaneously at the moment that the clamping arms clamp the steel billet to prepare for cutting, and counting is started from zero. In the cutting process, the steel billet and the cutting cart synchronously and vertically descend, the pulse data of the measuring wheel encoder and the pulse data of the cutting cart encoder are completely the same, and the final value of the fixed length of the steel billet is always zero. After cutting, the cutting cart quickly returns to the cart zero position from the lowest position of 2.5 meters, the final value of the fixed length of the billet is quickly changed from zero to the measured value of the fixed length of the billet below the horizontal position of the cutting gun of 2.8 meters, the position value of the cutting cart is zero, the final value of the fixed length of the billet = the measured value of the fixed length of the billet, and the measured value gradually increases along with the descending of the billet to wait for entering the next cutting cycle.

Example two:

as shown in fig. 1 and fig. 3, a high performance S7-1500 plc 1 is provided, and the length pulse of the downstream billet measured by the accessory measuring wheel encoder 3 of the measuring wheel 2 is sent to the high speed counting module built in the high performance S7-1500 plc 1, so as to automatically calculate the length measurement value of the specified length of the billet according to the preset parameters. The displacement pulse signal when the cutting cart descends or ascends is measured by the accessory cutting cart encoder 5 of the cutting cart 4 and is transmitted to the high-speed counting module arranged in the high-performance S7-1500 programmable controller 1, so that the position of the cutting cart 4 is automatically calculated in the high-performance S7-1500 programmable controller 1 according to preset parameters.

The final value of the specified length of the billet = the measured value of the specified length of the billet-the position value of the cutting cart.

The actual measurement value range of the billet fixed length is as follows: 0-10 m.

Cutting cart position value: 0-2.5 m.

The final value of the billet length at definite length is as follows: 0-10 m.

The measured value of the specified length of the billet, the position value of the cutting cart and the final value of the specified length of the billet are sent to the MP277 operating panel 6 for display.

As shown in fig. 2, if the production is changed or the operator finds the cutting position is wrong before cutting (at this time, the cutting position is a, and the actual measurement value of the specified length of the billet is L1=1.8 m), the cutting is stopped, when the cutting position is changed again, the cutting carriage 4 is manually moved to a new position (the cutting position is B, the position value of the cutting carriage 4 is L2=1.5 m, that is, the zero position error of the cutting carriage 4 is L2=1.5 m due to the reselection of the cutting position), the cutting is started, and at the moment when the clamping arms clamp the billet to prepare for cutting, the measuring wheel encoder 3 and the cutting carriage encoder 5 are simultaneously reset, and the counting is started from zero. In the cutting process, the steel billet and the cutting cart 4 synchronously and vertically descend, the pulse data of the measuring wheel encoder 3 and the pulse data of the cutting cart encoder 5 are completely the same, and the final value of the fixed length of the steel billet is always zero. After cutting, in the process that the cutting cart 4 quickly returns to the cart zero position from the lowest position, the position value of the cutting cart 4 is reduced to zero from the position value when the steel billet is cut off, and then is reduced to-1.5 m from zero, the final value of the steel billet fixed length is quickly changed from zero to the actual value of the steel billet fixed length below the horizontal position of the cutting gun, after that, the position value of the cutting cart 4 is kept at-1.5 m, the final value of the steel billet fixed length = the actual value of the steel billet fixed length- (-1.5 m), namely the final value of the steel billet fixed length = the actual value of the steel billet fixed length +1.5 m, thus, the zero position error of the cutting cart 4 caused by reselecting the cutting position is automatically compensated, the final value of the steel billet fixed length gradually increases along with the descending of the steel billet, and the next cutting cycle is waited to enter.

The two embodiments show that the horizontal position of the cutting gun is always the zero point of the measured value of the specified length of the billet in the whole production process no matter whether the cutting is carried out in normal production or when the cutting position is changed again. Therefore, the problem that the cutting length of the next steel billet is wrong when the cutting position is changed again in the normal production cutting process, and even the production disorder is caused is solved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included therein.