Batch rolling point dynamic adjusting method in wide and thick plate rolling

Abstract

The invention relates to the field of plate rolling, and particularly discloses a batch rolling point dynamic adjusting method in wide and thick plate rolling. According to the method, a traditional batch rolling process is adjusted, and various production data such as the total length L < total > of a roller way between rough rolling and finish rolling, the length L < access > of the roller way connected to a finish rolling inlet, the steel throwing distance L < steel throwing >, the preset safety distance L < safety >, the length L < plate blank > of a plate blank, the distance L < spacing > of adjacent plate blanks and the preset plate blank swing distance L < swing > are obtained; the batch dismounting point and the batch grouping point of batch rolling are flexibly adjusted through the two groups of calculation formulas, even if the length of slabs in a batch to be machined is short or the number of the slabs is small, the batch grouping point of batch rolling can be close to a finish rolling area as much as possible, then the batch dismounting distance is reduced, and the batch dismounting distance is shortened along with the increasing number of the whole group of slabs. And the position of the group batch point is gradually far away from the finish rolling area to obtain a larger batch rolling space, so that the invalid moving distance of the plate blank can be effectively reduced, and the abrasion of a roller way can be effectively reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of plate rolling, and in particular relates to a method for dynamically adjusting batch rolling points in wide and thick plate rolling. Background Art

[0002] On the double-stand wide and thick plate production line, the batch rolling process between the roughing mill and the finishing mill is used frequently. The so-called batch rolling process is that multiple slabs are formed into a group of slabs between the roughing mill and the finishing mill and swing together to wait for temperature, which is referred to as batch rolling. The process of adding the slabs after roughing rolling to the existing group of slabs is called batching. When the finishing mill area is empty, the first slab in the batch rolling will be split from the whole group of slabs and sent to the finishing rolling area for rolling. The process of splitting the batch rolling for slab finishing rolling is called splitting the batch.

[0003] When implementing the current batch rolling process, the slabs that have been rough rolled need to be manually or automatically added to the entire group of slabs at a specific position to form batch rolling. When the finishing mill area is empty, the entire group of slabs are conveyed forward to a specific position together, and then the first slab in the entire group is split and sent to the finishing rolling area for rolling.

[0004] When implementing this process, it can be found that this process has a large use defect. Because in the mode of fixed assembly point, if the space of the roughing and finishing rollers is to be fully utilized, for example, when the assembly point is designed to be close to the roughing mill, it is necessary to ensure that the rollers between the roughing mill and the finishing mill are long enough and have space to accommodate the preset maximum number of batch rolling blocks. Therefore, the direct distance between the specific assembly point and the specific de-assembling point on the existing roller is relatively long. At this time, when the entire group of slabs to be finish-rolled, that is, the slabs in the batch rolling are shorter or the number of slabs is smaller, the entire group of slabs will be between the specific assembly point and the specific de-assembling point. The slabs are placed on a long roller table near the roughing mill. When the slabs are separated, they need to be transported forward a long distance for separation and then transported backward a long distance for grouping. In this process, the slabs in batch rolling are transported over a long distance, which not only wastes production time but also causes more wear on the roller table. If the fixed grouping point is designed close to the finishing mill, the grouping space will be too small, wasting production line space. Even the finish-rolled slabs cannot be normally grouped when their length exceeds a certain range. Overall, the traditional process has major defects in use. Summary of the invention

[0005] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a method for dynamically adjusting batch rolling points in wide and thick plate rolling, so as to solve the problem that in the traditional batch rolling process, the slab transmission distance is long, which not only wastes production time, but also causes more wear to the rollers and has major usage defects.

[0006] To achieve the above object, the present invention provides the following technical solutions: A method for dynamically adjusting batch rolling points in wide and thick plate rolling, comprising: Get the total length L of the roller table between rough rolling and finishing rolling 总 , determine the length L of the roller table where it enters the finishing entrance 接入 , the steel throwing distance L of the roller 抛钢 and preset safety distance L 安全 ; Get the length L of the slab 板坯 , the distance between adjacent slabs L 间距 And the preset slab swing distance L 摆动 ; Taking the end of the roller table near the finishing entrance as the starting point, according to the formula Q 拆批点 =L 接入 +L 抛钢 +L 安全 Calculate the length from the batch splitting point to the starting point, and then determine the position of the batch splitting point on the roller table; According to the formula Q 组批点 =L 接入 +L 抛钢 +L 安全 +nL 板坯 +(n-1)L 间距 +L 摆动 The length from the batch point to the starting point is calculated, where n is the number of slabs in the batch rolling, and the position of the batch point is then determined on the roller table.

[0007] Preferably, the L 抛钢 According to the speed of the roller table, the L 抛钢 As the speed of the roller increases, the L 抛钢 It gradually shortens as the speed of the roller table decreases.

[0008] Preferably, the number n of the slabs satisfies the formula [L 接入 +L 抛钢 +L 安全 +nL 板坯 +(n-1)L 间距 +L 摆动 ] <L 总 , and n is an integer.

[0009] Preferably, the Q 组批点 In the calculation formula, L is increased according to whether an intermediate cooling step is required. 中间冷却 If no intermediate cooling step is added in the production process, Q 组批点 =L 接入 +L 抛钢 +L 安全 +nL 板坯 +(n-1)L 间距+L 摆动 If an intermediate cooling step is added to the production process, Q 组批点 =L 中间冷却 +L 接入 +L 抛钢 +L 安全 +nL 板坯 +(n-1)L 间距 +L 摆动 .

[0010] Compared with the prior art, the present invention has the following beneficial effects: The present invention adjusts the traditional batch rolling process by obtaining the total length L of the rollers between rough rolling and finishing rolling. 总 , the length of the roller table where it is connected to the finishing entrance L 接入 , throwing distance L 抛钢 and preset safety distance L 安全 , slab length L 板坯 , the distance between adjacent slabs L 间距 And preset slab swing distance L 摆动 The batch splitting point and batch grouping point of batch rolling can be flexibly adjusted through two sets of calculation formulas according to various production data such as the length of the slab in the batch to be processed is short or the number of slab blocks is small, the batch grouping point of the batch rolling can be as close to the finishing area as possible, thereby reducing the distance of batch splitting. As the number of slabs in the whole group increases, the position of the batch grouping point will gradually move away from the finishing area to obtain a larger batch rolling space, which can effectively reduce the ineffective movement distance of the slab on the roller during batch rolling, and can also effectively reduce the wear of the roller, while ensuring that when the length of the slab in the finishing rolling production is long, more L 接入 When the batch position is adjusted dynamically, the batch position will not be affected by L 接入 Coverage enables the batch grouping function to proceed smoothly and optimizes the batch group rolling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a block diagram of the dynamic adjustment method of the present invention; Figure 2 A diagram for determining batch points when a total of three slabs are processed by the method; Figure 3 A diagram for determining batch points when a total of 4 slabs are processed in a batch rolling process using the method; Figure 4 The diagram is for determining the batch points when the method is used to process a batch of slabs with a total of 6 slabs. DETAILED DESCRIPTION

[0012] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0013] Embodiment:

[0014] See also Figure 1 As shown, a method for dynamically adjusting batch rolling points in wide and thick plate rolling comprises: Get the total length L of the roller table between rough rolling and finishing rolling 总 , determine the length L of the roller table where it enters the finishing entrance 接入 , the steel throwing distance L of the roller 抛钢 and preset safety distance L 安全 , the L 抛钢 According to the speed of the roller table, the L 抛钢 As the speed of the roller increases, the L 抛钢 gradually shortens as the speed of the roller table decreases; Get the length L of the slab 板坯 , the distance between adjacent slabs L 间距 And preset slab swing distance L 摆动 ; Taking the end of the roller table near the finishing entrance as the starting point, according to the formula Q 拆批点 =L 接入 +L 抛钢 +L 安全 Calculate the length from the batch splitting point to the starting point, and then determine the position of the batch splitting point on the roller table; According to the formula Q 组批点 =L 接入 +L 抛钢 +L 安全 +nL 板坯 +(n-1)L 间距 +L 摆动 Calculate the length from the batching point to the batching point, where n is the number of slabs in the batch rolling, and then determine the position of the batching point on the roller table. The number of slabs n satisfies the formula [L 接入 +L 抛钢 +L 安全 +nL 板坯 +(n-1)L 间距 +L 摆动 ] <L 总 , and n is an integer, the Q 组批点 In the calculation formula, L is increased according to whether an intermediate cooling step is required. 中间冷却If no intermediate cooling step is added in the production process, Q 组批点 =L 接入 +L 抛钢 +L 安全 +nL 板坯 +(n-1)L 间距 +L 摆动 If an intermediate cooling step is added to the production process, Q 组批点 =L 中间冷却 +L 接入 +L 抛钢 +L 安全 +nL 板坯 +(n-1)L 间距 +L 摆动 .

[0015] From the above, we can know that by obtaining the total length L of the roller between rough rolling and finishing rolling 总 , the length of the roller table where it is connected to the finishing entrance L 接入 , throwing distance L 抛钢 and preset safety distance L 安全 , slab length L 板坯 , the distance between adjacent slabs L 间距 And preset slab swing distance L 摆动 The batch splitting point and batch grouping point of batch rolling can be flexibly adjusted through two sets of calculation formulas according to various production data such as the length of the slab in the batch to be processed is short or the number of slab blocks is small, the batch grouping point of the batch rolling can be as close to the finishing area as possible, thereby reducing the distance of batch splitting. As the number of slabs in the whole group increases, the position of the batch grouping point will gradually move away from the finishing area to obtain a larger batch rolling space, which can effectively reduce the ineffective movement distance of the slab on the roller during batch rolling, and can also effectively reduce the wear of the roller, while ensuring that when the length of the slab in the finishing rolling production is long, more L 接入 When the batch position is adjusted dynamically, the batch position will not be affected by L 接入 Coverage enables the batch grouping function to proceed smoothly and optimizes the batch group rolling process.

[0016] Reference Figure 2, after determining multiple production data such as the length of the roller between the roughing mill and the finishing mill, the roller splitting point is determined to be the No. 20 heat inspection position among multiple heat inspection positions, that is, the batch position is the No. 20 heat inspection position, that is, the entire group of slabs needs to be transferred to the No. 20 heat inspection position for splitting. In the figure, IMC is the intermediate cooling position. When the number of slabs in the entire group is small, as shown in the figure, there are already 2 slabs on the current roller. When the third slab is grouped, it can be batched at the No. 15 heat inspection position, which means that No. 15 is used as the dynamic swing point for batch rolling, which can ensure that the distance between the third slab and the No. 20 heat inspection position is shortened as much as possible while meeting production requirements, reducing the slab movement distance, shortening the process consumption time, and reducing the wear of the slab on the roller.

[0017] Reference Figure 3 , after determining multiple production data such as the length of the roller between the roughing mill and the finishing mill, the roller splitting point is determined to be the No. 20 heat inspection position among multiple heat inspection positions, that is, the batch position is the No. 20 heat inspection position, that is, the entire group of slabs needs to be transferred to the No. 20 heat inspection position for splitting. In the figure, IMC is the intermediate cooling position. When the number of slabs in the entire group is small, as shown in the figure, there are already 3 slabs on the current roller. When the fourth slab is grouped, it can be batched at the No. 14 heat inspection position, which means that No. 14 is used as the dynamic swing point for batch rolling, which can ensure that the distance between the fourth slab and the No. 20 heat inspection position is shortened as much as possible while meeting production requirements, reducing the slab movement distance, shortening the process consumption time, and reducing the wear of the slab on the roller.

[0018] Reference Figure 4 , after determining multiple production data such as the length of the roller between the roughing mill and the finishing mill, the roller splitting point is determined to be the No. 20 heat inspection position among multiple heat inspection positions, that is, the batch position is the No. 20 heat inspection position, that is, the entire group of slabs needs to be transferred to the No. 20 heat inspection position for splitting. In the figure, IMC is the intermediate cooling position. When the number of slabs in the entire group is small, as shown in the figure, there are already 5 slabs on the current roller. When the 6th slab is grouped, it can be batched at the No. 11 heat inspection position, which means that No. 11 is used as the dynamic swing point of batch rolling, which can ensure that the distance between the 6th slab and the No. 20 heat inspection position is shortened as much as possible while meeting production requirements, reducing the slab movement distance, shortening the process consumption time, and reducing the wear of the slab on the roller.

[0019] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0020] In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

Claims

1. A method for dynamically adjusting batch rolling points in wide and thick plate rolling, characterized in that: include: Get the total length L of the roller table between rough rolling and finishing rolling 总 , determine the length L of the roller table where it enters the finishing entrance 接入 , the steel throwing distance L of the roller 抛钢 and preset safety distance L 安全 ; Get the length L of the slab 板坯 , the distance between adjacent slabs L 间距 And the preset slab swing distance L 摆动 ; Taking the end of the roller table near the finishing entrance as the starting point, according to the formula Q 拆批点 =L 接入 +L 抛钢 +L 安全 Calculate the length from the batch splitting point to the starting point, and then determine the position of the batch splitting point on the roller table; According to the formula Q 组批点 =L 接入 +L 抛钢 +L 安全 +nL 板坯 +(n-1)L 间距 +L 摆动 The length from the batch point to the starting point is calculated, where n is the number of slabs in the batch rolling, and the position of the batch point is then determined on the roller table.

2. The method for dynamically adjusting batch rolling points in wide and thick plate rolling according to claim 1, characterized in that: The L 抛钢 According to the speed of the roller table, the L 抛钢 As the speed of the roller increases, the L 抛钢 It gradually shortens as the speed of the roller table decreases.

3. The method for dynamically adjusting batch rolling points in wide and thick plate rolling according to claim 1, characterized in that: The number n of slabs satisfies the formula [L 接入 +L 抛钢 +L 安全 +nL 板坯 +(n-1)L 间距 +L 摆动 ] <L 总 , and n is an integer.

4. The method for dynamically adjusting batch rolling points in wide and thick plate rolling according to claim 1, characterized in that: The Q 组批点 In the calculation formula, L is increased according to whether an intermediate cooling step is required. 中间冷却 If no intermediate cooling step is added in the production process, Q 组批点 =L 接入 +L 抛钢 +L 安全 +nL 板坯 +(n-1)L 间距 +L 摆动 If an intermediate cooling step is added to the production process, Q 组批点 =L 中间冷却 +L 接入 +L 抛钢 +L 安全 +nL 板坯 +(n-1)L 间距 +L 摆动 .

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