Method for automatic material interchange in urgent specification change of hot rolling production line

It is an emergency technology for changing specifications, which is applied in the direction of metal rolling, metal rolling, rolling mill control devices, etc. It can solve the problems of cumbersome comparison work, increased inventory, and low work efficiency, and achieves high effectiveness and practicability. The effect of optimizing the product manufacturing process and reducing the capital occupation rate

Active Publication Date: 2014-04-30
ANGANG STEEL CO LTD
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Problems solved by technology

In actual operation, due to many matching conditions, the comparison work is cumbersome, the work efficiency is low, and the accuracy is poor
And due to the time difference of the operation, the matching contract can be included in the rolling plan to...

Method used

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Embodiment Construction

[0019] The method for automatic exchange and conversion of hot-rolling line emergency specification materials in the present invention, the background operating system of the third-level computer is AIX, the background program is developed by C, and the database system adopts DB2. The model adopts stored procedure code, and the third-level computer receives After urgently modifying the specification message, the secondary computer calls the model storage process to search for virtual slabs that meet the contract matching conditions from the daily plan but not the rolling mill operation plan. If found, it will be exchanged and used; Unplanned processing according to the original process. Its specific method and steps are:

[0020] Determine the interchange model constraints:

[0021] 1. When the specification of the rolling line is urgently changed, only the rolling target thickness is changed, and the target width is not changed.

[0022] 2. The target width and target t...

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Abstract

The invention provides a method for automatic material interchange in urgent specification change of a hot rolling production line. When a three-level computer receives a second-level specification change telegraph text, virtual slabs which are not brought into a rolling mill operating plan yet and meet contract matching conditions are searched for interchange. Model constraint conditions include that the width and thickness of hot rolling materials are identical to the target width and target thickness of an order, actual steel codes of the slabs are identical to representative steel codes or nominal steel code of the order, the nominal width of the slabs minus the maximum side pressure quantity of the slabs is smaller than or equal to a target width value of a hot rolling procedure outlet, the nominal width of the slabs minus the minimum side pressure quantity of the slabs is larger than or equal to the target width value of the hot rolling procedure outlet, checking weight is larger than or equal to a minimum inlet piece weight and smaller than or equal to a maximum inlet piece weight, and solution can be worked out by translating matching between the contract and the slabs into a 0-1 knapsack problem. Using the method can improve operating efficiency, shorten delivery time for users, reduce overstocked products, quicken logistic circulation and reduce coil surplus and capital employment rate.

Description

technical field [0001] The invention belongs to the field of automatic control of steel rolling, and in particular relates to an automatic exchange and conversion method of materials used for emergency specification change of a hot rolling production line. Background technique [0002] In the production process, due to the influence of restrictive conditions such as production technology, specification group spacing, contract quantity, and roll change, the rolling line needs to change specifications urgently, thereby producing indefinite quantities of non-entrusted steel coils that do not belong to any contract. It is called unplanned steel coil. At present, the domestic hot rolling production line, as unplanned steel coils in the steel coil warehouse, is manually operated by the contractor according to the shortage of the contract, so as to realize the exchange and conversion. In actual operation, due to many matching conditions, the comparison work is cumbersome, the work...

Claims

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Application Information

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IPC IPC(8): B21B37/00
Inventor 田晓霞陈婧车志良车兰张喆
Owner ANGANG STEEL CO LTD
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