Hot continuous rolling production control method in constant-gap organizing mode

A production control method, hot continuous rolling technology, applied in the direction of rolling mill control device, metal rolling, metal rolling, etc., can solve the problems of increased running time, no rolling line rhythm control, etc., to avoid scrap steel and accidents, production high efficiency effect

Active Publication Date: 2021-01-05
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent application (CN201210132387.7) "A Control Method for Improving the Rhythm of Rough Rolling", the detection device on the roller table detects the head and tail of the slab, and then controls the speed of each group of roller tables respectively according to the detection results. The upper is also to increase the running time of the steel
Currently there is no method for rhythm control of the entire rolling line

Method used

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  • Hot continuous rolling production control method in constant-gap organizing mode
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  • Hot continuous rolling production control method in constant-gap organizing mode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1: 2 roughing mills in the 1780 production line, 3 passes each in R1 and R2, 7 finishing mills, and 2 coilers. The main equipment distance is as figure 1 Shown:

[0032] At a certain moment, this piece of steel is in the 1# furnace with a rolling specification of 3.45*1265, and the next piece of steel is in the 2# furnace with a rolling specification of 5.01*1300. The production method of constant gap tissue is as follows:

[0033]1) Determine the reference points of the main process equipment, heating furnace, R1 rolling mill, R2 rolling mill, F1, F2, F3, F4, F5, F6, F7 rolling mill, DC1 coiler pinch roll, the distance between the heating furnace and the R1 rolling mill, R1 Rolling mill to R2 rolling mill, R2 rolling mill to R3 rolling mill---Rb rolling mill to F1 rolling mill, F1 rolling mill to 1# coiler pinch roll spacing are 401600 / 671600 / 941600 (corresponding to 1# furnace, 2# furnace and 3 #furnace), 80000, 1182500, 5500, 5500, 5500, 5500, 5500, 5500, ...

Embodiment 2

[0059] Example 2: The 1780 production line has 2 roughing mills, R1 and R2 each rolled for 3 passes, 7 finishing mills, and 2 coilers. The main equipment distance is as figure 1 Shown:

[0060] At a certain moment, this piece of steel is in the 2# furnace with a rolling specification of 5.01*1300, and the next piece of steel is in the 3# furnace with a rolling specification of 7.07*1040. The production method of constant gap tissue is as follows:

[0061] 1) Determine the reference points of the main process equipment, heating furnace, R1 rolling mill, R2 rolling mill, F1, F2, F3, F4, F5, F6, F7 rolling mill, DC1 coiler pinch roll, the distance between the heating furnace and the R1 rolling mill, R1 Rolling mill to R2 rolling mill, R2 rolling mill to R3 rolling mill---Rb rolling mill to F1 rolling mill, F1 rolling mill to 1# coiler pinch roll spacing are 401600 / 671600 / 941600 (corresponding to 1# furnace, 2# furnace and 3 #furnace), 80000, 1182500, 5500, 5500, 5500, 5500, 55...

Embodiment 3

[0087] Example 3: 2 roughing mills in the 1780 production line, 3 passes each in R1 and R2, 7 finishing mills, and 2 coilers. The main equipment distance is as figure 1 Shown:

[0088] At a certain moment, this piece of steel is in the 3# furnace with a rolling specification of 7.07*1040, and the next piece of steel is in the 1# furnace with a rolling specification of 2.0*1214. The production method of constant gap tissue is as follows:

[0089] 1) Determine the reference points of the main process equipment, heating furnace, R1 rolling mill, R2 rolling mill, F1, F2, F3, F4, F5, F6, F7 rolling mill, DC1 coiler pinch roll, the distance between the heating furnace and the R1 rolling mill, R1 Rolling mill to R2 rolling mill, R2 rolling mill to R3 rolling mill---Rb rolling mill to F1 rolling mill, F1 rolling mill to 1# coiler pinch roll spacing are 401600 / 671600 / 941600 (corresponding to 1# furnace, 2# furnace and 3 #furnace), 80000, 1182500, 5500, 5500, 5500, 5500, 5500, 5500, ...

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Abstract

The invention relates to a hot continuous rolling production control method in a constant-gap organizing mode, which comprises the steps that firstly, the gap time necessary for safe operation of datum points of processes is determined by methods such as actual measurement verification, namely, the minimum gap time for safe production is ensured to serve as a basis for controlling the gap time; then, the current time for drawing out the head and tail of steel to the datum points of the processes and the current time for the head of the next steel to arrive at the datum points of the processesare calculated through one-time set data of the model; and the gap time between the steel and the next steel serves as the gap time necessary for safe operation of the process datum points to reversethe time for drawing out the next steel, and the maximum value of the time (moment), required by all process points, for drawing out the next steel is taken as the actual time for drawing out the nextsteel by a production organization. The maximum value is taken from the minimum gap time necessary for each process, and actually, production is organized by taking the bottleneck process as the center. And each piece of steel is subjected to the calculation and control, and essentially, the production is organized by taking a dynamic change bottleneck procedure as a center, so that the productivity maximization is realized.

Description

technical field [0001] The invention relates to a production organization method, in particular to a constant-gap structure hot rolling production control method, and belongs to the technical field of hot continuous rolling production control. Background technique [0002] At present, hot rolling production is developing in the direction of high strength, high efficiency, uniformity and stability. High strength can reduce thickness and weight, reduce user consumption, and achieve green development; high efficiency can reduce production costs; uniformity and stability can improve product quality. Rolling steel is generally rolled one by one. There is a certain time interval between the tail of the previous piece of steel leaving the rolling mill and the head of the next piece of steel arriving at the rolling mill, that is, there is a certain gap time between the two pieces. Not only a lot of energy and power are consumed during the rolling process, but also a lot of energy a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/00B21B1/26
CPCB21B37/005B21B1/26B21B2201/06Y02P90/02
Inventor 李欣波尚雯万书亮
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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