JP3021364B2 - Slab refining method - Google Patents
Slab refining methodInfo
- Publication number
- JP3021364B2 JP3021364B2 JP8262903A JP26290396A JP3021364B2 JP 3021364 B2 JP3021364 B2 JP 3021364B2 JP 8262903 A JP8262903 A JP 8262903A JP 26290396 A JP26290396 A JP 26290396A JP 3021364 B2 JP3021364 B2 JP 3021364B2
- Authority
- JP
- Japan
- Prior art keywords
- slab
- refining
- delivery
- care
- time
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Control By Computers (AREA)
Description
【0001】[0001]
【発明の属する技術分野】本発明は、鋳片の精整方法に
関し、特に、特殊鋼、高炭素鋼からなる鋳片を、次工程
である加熱炉への受け渡し納期の遅れを最小に抑え、グ
ラインダー、ショット・ブラスト等を用いて冷間で手入
れする方法に係わる。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for refining cast slabs, and more particularly, to minimizing the delay in delivery of a cast slab made of special steel or high carbon steel to a heating furnace which is the next step. The present invention relates to a method of performing cold maintenance using a grinder, shot blast, or the like.
【0002】[0002]
【従来の技術】連続鋳造で得た鋳片から最終製品である
熱延鋼板を生産するには、鋳片の精整、加熱、圧延、熱
処理等の多くの工程を順次配列した生産ラインが用いら
れる。そして、この生産ラインの各工程においては、ユ
ーザからの製品納期に応じて、次工程への鋳片あるいは
鋼材の受け渡し、該生産ラインの処理能力向上のための
ロット揃えを考慮しつつ、いかなる鋳片をいつ処理する
か決め、操業が行われる。2. Description of the Related Art In order to produce a hot-rolled steel sheet as a final product from a slab obtained by continuous casting, a production line in which many steps such as refining, heating, rolling and heat treatment of a slab are sequentially arranged is used. Can be In each step of this production line, depending on the product delivery date from the user, delivery of cast slabs or steel materials to the next step, taking into account lot alignment for improving the processing capacity of the production line, Decide when to process the pieces and the operation takes place.
【0003】ところで、鋳造されたままの鋳片には、表
面欠陥、内部欠陥あるいは寸法や形状の不良が存在し、
そのままでは鋼材や鋼板の製造に適さないことが多い。
そのため、ほとんどの鋳片は、その使用に際して、検査
と手入れ、つまり精整工程を経ることになる。具体的な
手入れ手段には、鋳片に高速の酸素ガスを吹き付け、そ
の表層を酸化除去するホット・スカーファ、表層を冷間
で研磨するグラインダー、表層に鉄粒を圧縮空気で叩き
つけるショット・ブラスト等が一般に用いられている。[0003] As-cast slabs have surface defects, internal defects or defective dimensions and shapes.
As is, it is often unsuitable for the production of steel and steel plates.
Therefore, most of the slabs undergo an inspection and care, that is, a refining process when used. Specific means of care include hot scarfers that blow high-speed oxygen gas onto the slab and oxidize and remove the surface layer, grinders that polish the surface layer cold, shot blasting that strikes iron particles on the surface layer with compressed air, etc. Is generally used.
【0004】この鋳片の精整工程では、従来より、前記
した鋳片の処理決定を、手入れ手段の稼動時間と同一鋼
種鋳片の平均標準処理時間(鋳片の鋼種同一にのみ着眼
して整理した、多数の鋳片の平均処理時間値)に基づ
き、下記のように決定している。例えば、鋳片のグライ
ンダーによる精整工程で、ある日の鋳片処理スケジュー
ルを、前日に、A鋳片,B鋳片,C鋳片,・・・・・
・、I鋳片、J鋳片の順に組んだとする。ところが、従
来は、手入れ命令の作成時に設定した鋳片の平均処理時
間は、実際の手入れ使用や鋳片サイズを考慮していない
ので、実際の処理時間と異なる場合が多い。従って、前
日作成した手入れ計画と実績の乖離から手入れスケジュ
ールを組み直すようにしていた。しかしながら、組み直
しを行っても、その効果を定量的に判定することは困難
であった。In the slab refining process, the above-mentioned slab processing determination has been conventionally determined by the average standard processing time of the same type of slab as the operating time of the care means (only the same type of slab is used. The average processing time value of a large number of cast slabs) is determined as follows. For example, in the refining process of a slab by a grinder, a slab treatment schedule of a certain day is changed to A slab, B slab, C slab,.
・ Assume that I slab and J slab are assembled in this order. However, conventionally, the average processing time of a slab set at the time of creating a care instruction is often different from the actual processing time because actual slab use and slab size are not taken into account. Therefore, the maintenance schedule was reconfigured based on the difference between the maintenance plan prepared on the previous day and the actual results. However, even if reassembly is performed, it is difficult to quantitatively determine the effect.
【0005】すなわち、従来の鋳片精整方法では、需要
家による納期変更や工程に何らかのトラブルが発生した
場合、次工程にマイナスの影響を与えたり、工程管理者
に多大の業務負荷、つまり、事前に手入れ鋳片の過不足
が予測できないので、危険率を見込んだ鋳片を精整工場
内に確保したり、確保できない時には、不要な搬送、緊
急の搬送を実施したり、それらの実施調整等、を強いる
のみで、効率の良い作業が実施できなくなるという問題
があった。[0005] That is, in the conventional slab refining method, if the customer changes the delivery date or some trouble occurs in the process, it has a negative effect on the next process, or a large work load on the process manager, that is, Since it is not possible to predict the excess or deficiency of care slabs in advance, secure slabs in anticipation of the risk factor in the refining factory, and when they cannot be secured, carry out unnecessary or urgent transportation and adjust their implementation However, there is a problem that efficient work cannot be performed simply by forcing the user to perform such tasks.
【0006】[0006]
【発明が解決しようとする課題】本発明は、かかる事情
を鑑み、加熱炉への鋳片受け渡し納期の遅れをできるだ
け防止し、且つ精整工程を効率良く稼働する鋳片の精整
方法を提供することを目的としている。SUMMARY OF THE INVENTION In view of the above circumstances, the present invention provides a method for refining a slab that minimizes delays in delivery of a slab to a heating furnace and efficiently operates the refining process. It is intended to be.
【0007】[0007]
【課題を解決するための手段】発明者は、上記目的を達
成するため鋭意研究し、従来処理対象鋳片の鋼種だけで
定めていた予測処理時間を、鋳片サイズ、研削部位、研
削速度、グラインダの移動間隔、同一部位での研削回数
をも配慮した個別の予測処理時間とすることに着眼し、
本発明を完成させた。Means for Solving the Problems The inventor of the present invention has studied diligently in order to achieve the above-mentioned object, and has set the predicted processing time, which has been determined only by the steel type of the slab to be processed, to the slab size, the grinding portion, the grinding speed, Focusing on individual prediction processing time taking into account the movement interval of the grinder and the number of grindings on the same part,
The present invention has been completed.
【0008】すなわち、本発明は、加熱炉装入前に、鋳
片に手入れを施すに際し、手入れ対象鋳片の1本毎の予
測処理時間と手入れ手段の稼動時間とから、当該手入れ
手段の処理能力を求め、加熱炉への受け渡し納期遅れを
最小にするよう手入れ順を定め、鋳片に手入れを施すこ
とを特徴とする鋳片の精整方法である。また、本発明
は、上記手入れを、グラインダーで行うことを特徴とす
る鋳片の精整方法でもある。That is, according to the present invention, when the slab is treated before the heating furnace is charged, the treatment time of the treatment means is calculated from the estimated processing time of each slab to be treated and the operating time of the treatment means. This is a method for refining a slab, wherein the slab is sought after the ability is determined, the care order is determined so as to minimize the delivery delay to the heating furnace, and the slab is cared for. The present invention is also a method for refining a slab, wherein the above-mentioned care is performed by a grinder.
【0009】本発明では、加熱炉装入前の鋳片を、上記
のような構成の方法で手入れするようにしたので、鋳片
処理計画の精度が高まり、加熱炉への鋳片受け渡し納期
の遅れが抑制できるようになる。その結果、鋳片の精整
を効率良く、円滑に稼働できるようになった。In the present invention, since the slab before charging the heating furnace is maintained by the method having the above-described structure, the accuracy of the slab processing plan is improved, and the delivery time of the slab to the heating furnace is improved. The delay can be suppressed. As a result, the casting slab can be efficiently and smoothly operated.
【0010】[0010]
【発明の実施の形態】図1は、本発明に係る鋳片の精整
方法を示すフロー・チャートである。まず、鋳片のデー
タ・ベース(現品情報DBという)から加熱炉装入予定
時間(次工程納期)等の現品情報(D11)を調べ、手
入れ対象鋳片を手入れ順に仮配列する(S01)。FIG. 1 is a flowchart showing a method for refining a slab according to the present invention. First, actual product information (D11) such as a scheduled heating furnace charging time (the next process delivery date) is checked from a slab data base (referred to as an actual product information DB), and the slabs to be treated are provisionally arranged in the order of maintenance (S01).
【0011】次に、現品情報DBには、鋳片を鋼種及び
サイズの同一であることを区分単位として、多種の鋳片
に関する予測処理時間(D12)が従来の経験値として
保存されているので、その鋳片の予測処理時間(D1
2)と、工程情報データ・ベース(工程情報DBとい
う)に保存されている手入れ手段の稼動時間(D21)
を基にして、前記SO1で仮配列した順に、鋳片を稼動
時間枠(タイム・テーブル)に割り付ける(S02)。Next, in the actual product information DB, the predicted processing time (D12) for various types of slabs is stored as a conventional empirical value, with the slabs being of the same steel type and size as a unit of division. , The estimated processing time of the slab (D1
2) and the operating time (D21) of the care means stored in the process information database (called process information DB)
Are assigned to operating time frames (time tables) in the order in which they are provisionally arranged in SO1 (S02).
【0012】本発明の重要なポイントは、従来、同一鋼
種鋳片の平均標準処理時間を基にしていたこの割りつけ
を、鋳片を鋼種及びサイズの同一であることを区分単位
とした予測処理時間に変更したことにある。つまり、従
来の平均標準処理時間では、鋼種の同一だけを配慮して
いたので、サイズが異なると、実際に手入れされる鋳片
の処理時間に、図4に示すような大幅な狂いが生じる。
そこで、本発明では、前記したように、鋳片のサイズ、
研削部位、研削速度、グラインダの移動間隔、同一部位
での研削回数を配慮した、手入れ対象鋳片に適切な前記
予測処理時間を用いるようにして、手入れ手段の処理能
力と一致するようにした。その結果、図3から明らかな
ように、精整計画の精度が向上し、該計画と実績が一致
した。また、精整計画の精度が向上したため、図2に示
すように、精整計画の遵守率が向上し、精整工場での鋳
片の滞留日数が大幅に減少した。その結果、加熱炉装入
納期後れが減少し、且つ鋳片の在庫削減、生産管理上の
リード・タイム短縮に大きく寄与した。なお、図2は、
本発明適用前後のグラインダー工場での鋳片滞留平均日
数と、精整計画の遵守率(命令に従った実施本数/命令
本数)とを経時的に示したものである。An important point of the present invention is that this allocation, which has conventionally been based on the average standard processing time of the same steel type slab, is performed by a prediction process in which the slabs have the same steel type and size as a unit. Have changed to time. That is, in the conventional average standard processing time, only the same type of steel is considered, so that if the size is different, the processing time of the slab actually cared for will greatly vary as shown in FIG.
Therefore, in the present invention, as described above, the size of the slab,
The predicted processing time appropriate for the slab to be treated is used in consideration of the grinding portion, the grinding speed, the moving interval of the grinder, and the number of times of grinding at the same portion, so that the processing ability matches the processing capability of the maintenance means. As a result, as is evident from FIG. 3, the accuracy of the refining plan was improved, and the plan and the results were in agreement. In addition, since the accuracy of the refining plan was improved, as shown in FIG. 2, the compliance rate of the refining plan was improved, and the number of days of slabs staying at the refining factory was significantly reduced. As a result, the delay in the delivery of the heating furnace was reduced, and the inventories of cast slabs were reduced, and the lead time in production management was greatly reduced. In addition, FIG.
It shows the average number of days of slab stay in a grinder plant before and after the application of the present invention and the compliance rate of the refining plan (number of executions in accordance with instructions / number of instructions) over time.
【0013】さらに、本発明では、上記の割りつけられ
た鋳片が、次工程納期(加熱炉装入予定時間)に間に合
うかどうかのチェックを行う(S03)。そして、もし
納期遅れに該当する鋳片が存在する場合には、処理順序
の再配列を行う(S04)。この処理順序の再配列は、
納期遅れ本数が最小になるようにすれば、いかなる順序
でも良い。Further, in the present invention, it is checked whether the allocated slab is in time for the next process delivery date (scheduled heating furnace charging time) (S03). If there is a slab corresponding to the delivery delay, the processing order is rearranged (S04). This rearrangement of the processing order is
Any order may be used as long as the number of delivery delays is minimized.
【0014】[0014]
【発明の効果】以上、述べたように、本発明により、鋳
片処理計画の精度が高まり、加熱炉への鋳片受け渡し納
期の遅れが抑制できるようになり、今まで工程管理者に
重い負荷を与えていた鋳片の精整作業が効率良く、円滑
に行えるようになった。As described above, according to the present invention, the accuracy of the slab treatment plan is improved, the delay in the delivery of the slab to the heating furnace can be suppressed, and a heavy load is imposed on the process manager until now. The work of refining the cast slab which had been given a high efficiency can be performed efficiently and smoothly.
【図1】本発明に係る鋳片の精整方法のフロー・チャー
トを示す図である。FIG. 1 is a diagram showing a flow chart of a method for refining a slab according to the present invention.
【図2】本発明の適用効果を示す図である。FIG. 2 is a diagram showing an application effect of the present invention.
【図3】本発明に係る鋳片精整方法に基づく処理スケジ
ュールと手入れ実績を比較した図である。FIG. 3 is a diagram comparing a treatment schedule based on a slab refining method according to the present invention and a maintenance result.
【図4】従来の鋳片精整方法に基づく処理スケジュール
と手入れ実績を比較した図である。FIG. 4 is a diagram comparing a processing schedule based on a conventional slab refining method and a maintenance result.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平4−178704(JP,A) 特開 昭62−164811(JP,A) 特開 平8−164476(JP,A) 特開 平6−315757(JP,A) 特開 平10−540(JP,A) (58)調査した分野(Int.Cl.7,DB名) B22D 29/00 B22D 46/00 G05B 15/02 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-178704 (JP, A) JP-A-62-164811 (JP, A) JP-A-8-164476 (JP, A) JP-A-6-164476 315757 (JP, A) JP-A-10-540 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) B22D 29/00 B22D 46/00 G05B 15/02
Claims (2)
施すに際し、 手入れ対象鋳片の1本毎の予測処理時間と手入れ手段の
稼動時間とから、当該手入れ手段の処理能力を求め、加
熱炉への受け渡し納期遅れを最小にするよう手入れ順を
定め、鋳片に手入れを施すことを特徴とする鋳片の精整
方法。When treating the surface of a slab before charging a heating furnace, the processing capacity of the maintenance means is determined based on the estimated processing time of each slab to be maintained and the operating time of the maintenance means. A method of refining a slab, comprising determining the order of care so as to minimize delays in delivery and delivery to a heating furnace, and performing slab care.
を特徴とする請求項1記載の鋳片の精整方法。2. The method for refining a slab according to claim 1, wherein said care is performed by a grinder.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8262903A JP3021364B2 (en) | 1996-10-03 | 1996-10-03 | Slab refining method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8262903A JP3021364B2 (en) | 1996-10-03 | 1996-10-03 | Slab refining method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH10109155A JPH10109155A (en) | 1998-04-28 |
JP3021364B2 true JP3021364B2 (en) | 2000-03-15 |
Family
ID=17382214
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8262903A Expired - Fee Related JP3021364B2 (en) | 1996-10-03 | 1996-10-03 | Slab refining method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3021364B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5010386B2 (en) * | 2007-08-07 | 2012-08-29 | 株式会社神戸製鋼所 | Production sequence determination device and production sequence determination method |
-
1996
- 1996-10-03 JP JP8262903A patent/JP3021364B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH10109155A (en) | 1998-04-28 |
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