Method for changing a roll box in a thin strip casting process

Abstract

The present application relates to the field of metallurgy, and relates to the improvement of the production rhythm and the safety and stability of the production of ultrathin strip, in particular to a method for replacing a roll box in a thin strip casting and rolling process. The method of the present application comprises the following steps: roll box cleaning and caster cleaning; equipment state confirmation; adjusting the core nozzle and the side seal unit; baking the core nozzle; equipment parameter confirmation; caster zone simulation, wherein the step of adjusting the core nozzle and the side seal unit is divided into: a first sub-step: adjusting the core nozzle using a robot; a second sub-step: adjusting the side seal unit, and the step of baking the core nozzle is carried out between the first sub-step and the second sub-step. The method of the present application significantly shortens the time for replacing the roll box, accelerates the production rhythm of thin strip casting and rolling, and brings considerable economic benefits.

Description

Technical Field

[0001] This invention relates to the field of metallurgical technology, and specifically to improving the production rhythm and safety stability of ultra-thin strips, and more particularly to a method for changing roll boxes in the thin strip casting and rolling process. Background Technology

[0002] After a standard roll box change, the casting machine requires a robot simulation to check if the equipment is functioning correctly; only after the simulation can the core sprue be baked. Since the core sprue baking process requires at least 60 minutes, the total roll box change time is 240 minutes. After the core sprue is baked, the casting machine cannot perform simulations again, making it impossible to identify potential equipment problems and affecting the safety, continuity, and stability of production. Performing simulations would waste a pair of core sprues, costing approximately 20,000 yuan. Summary of the Invention

[0003] After each roll box change for ultra-thin strip casting, the casting machine area needs to be simulated. Conventional simulations require a robot, with roll boxes changing an average of 10 times per month. The process requires a minimum of 60 minutes of baking time for the core sprue, resulting in a 4-hour timeframe from roll box change to start production each time. By optimizing the roll box change procedure and using robot-free simulation, and pre-emptively changing the core sprue, 60-90 minutes of roll box change time can be saved, effectively improving production efficiency. Furthermore, in the past, there have been instances where abnormal equipment conditions in the casting machine area occurred, but due to the core sprue already being baked, it was impossible to pinpoint the problem through simulation, introducing uncertainty into production safety and stability.

[0004] The present invention specifically adopts the following technical solution:

[0005] According to one aspect of the present invention, a method for changing roll boxes in a thin strip casting and rolling process is provided, the method comprising the following steps:

[0006] Roller box cleaning and casting machine cleaning;

[0007] Equipment status confirmed;

[0008] Adjust the core inlet and side sealing unit;

[0009] Baking the core sprue;

[0010] Equipment parameters confirmed;

[0011] Simulation of casting machine area

[0012] Its features are:

[0013] The method divides the steps of adjusting the core nozzle and side sealing unit into:

[0014] First sub-step: Use a robot to adjust the core sprue;

[0015] Second sub-step: Adjust the side sealing unit.

[0016] The step of baking the core gate is performed between the first sub-step and the second sub-step.

[0017] According to the method for replacing the roller box of the present invention, preferably, the step of baking the core nozzle is performed before the simulation step in the casting machine area.

[0018] According to the method for replacing the roller box of the present invention, preferably, the method further includes: manually placing the side sealing unit onto the side sealing bracket before the simulation step in the casting machine area.

[0019] According to the method for replacing the roller box of the present invention, preferably, the method further includes: manually adding virtual signals to the automatic setting program for casting machine start-up to meet the start-up setting conditions.

[0020] According to the method for changing the roller box of the present invention, preferably, the method further includes: after the automatic setting program is executed, interrupting the automatic setting program and manually operating in the interface to meet the opening conditions.

[0021] According to the method for changing the roller box of the present invention, preferably, the baking time of the core sprue step is not less than 60 minutes.

[0022] Beneficial technical effects

[0023] The method of this invention creates the following benefits:

[0024] Based on replacing the roller box 10 times a month, saving 1 hour each time, it can pour 8.3 more heats of molten steel; based on a yield rate of 93%, it can produce 791 more tons of hot-rolled coils; based on a profit of 500 yuan per ton of steel, the monthly benefit is 395,500 yuan; the annual benefit is 4,746,000 yuan. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0026] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0027] The following are embodiments of the present invention. The described embodiments are only a part of the embodiments of the present invention. All other embodiments that can be obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0028] The 60 minutes required for baking the core sprue is the main factor contributing to the long roll box changing time. This invention addresses this by breaking down the robot adjustment steps, pre-adjusting the robot's core sprue position, and starting the core sprue baking process immediately after adjustment, before proceeding with other adjustments. Pre-baking the core sprue eliminates the need for the robot to participate in the casting machine simulation process.

[0029] The main limiting factor in the robot-less solution adopted in this invention is the interference between the side-sealing unit and the automatic setting process program.

[0030] (1) Since the side sealing unit is to be attached to the end of the casting roll, if the robot does not have a side sealing unit during the simulation, the side sealing unit support will touch the end of the casting roll, damaging the chromium layer of the side sealing unit support and the end of the casting roll.

[0031] (2) In the automatic setting program for casting machine start-up, the robot's motion signal conditions will affect the motion process of other equipment.

[0032] Regarding problem (1), the present invention solves this problem by manually placing the side sealing unit on the side sealing unit support before simulation.

[0033] Regarding problem (2), the present invention solves this problem by manually adding virtual (fake) signals to meet the start-up conditions; after the automatic setting program is executed, the automatic setting program is interrupted, and manual operation is performed in the interface to meet the start-up conditions.

[0034] Table 1 Comparison of timelines between existing solutions and the present invention

[0035]

[0036]

[0037] The above description is only a specific embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for replacing roller boxes in a thin strip casting and rolling process, characterized in that, The method includes the following steps: Roller box cleaning and casting machine cleaning; Equipment status confirmed; Adjust the core inlet and side sealing unit; Baking the core sprue; Equipment parameters confirmed; Simulation of casting machine area Its features are: The method divides the steps of adjusting the core nozzle and side sealing unit into: First sub-step: Use a robot to adjust the core sprue; Second sub-step: Adjust the side sealing unit. The core nozzle baking step is performed between the first sub-step and the second sub-step, and the core nozzle baking step is performed before the casting machine area simulation step, and the core nozzle baking step takes no less than 60 minutes.

2. The method for replacing the roller box according to claim 1, characterized in that: The method further includes: Before the simulation step in the casting machine area, the side sealing unit is manually placed on the side sealing bracket.

3. The method for replacing the roller box according to claim 1, characterized in that: The method further includes: Add virtual signals manually to the automatic setting program for casting machine start-up to meet the start-up setting conditions.

4. The method for replacing the roller box according to claim 3, characterized in that: The method further includes: After the automatic setting program is executed, interrupt the automatic setting program and manually operate in the interface to meet the pouring conditions.

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