JP2871512B2 - Material supply method to pipe cutting machine - Google Patents
Material supply method to pipe cutting machineInfo
- Publication number
- JP2871512B2 JP2871512B2 JP3604895A JP3604895A JP2871512B2 JP 2871512 B2 JP2871512 B2 JP 2871512B2 JP 3604895 A JP3604895 A JP 3604895A JP 3604895 A JP3604895 A JP 3604895A JP 2871512 B2 JP2871512 B2 JP 2871512B2
- Authority
- JP
- Japan
- Prior art keywords
- cutting machine
- pipe cutting
- cutting
- tube
- pipe
- 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
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は、並列配置された複数の
管切断機を用いて、複数本の素材を同時並行して切断す
る場合の、管切断機への素材供給方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for supplying a material to a tube cutting machine when a plurality of materials are cut in parallel by using a plurality of tube cutting machines arranged in parallel.
【0002】[0002]
【従来の技術】コールドピルガーミルによる冷間管圧延
には、その素管として熱間押出し法により製造された所
謂押出し管が用いられる。この押出し管は、能率等の点
から素管長さより長い長尺管として製造され、冷間管圧
延に供する前に圧延に好都合な長さの短尺管に切断され
る。2. Description of the Related Art In cold tube rolling by a cold pilger mill, a so-called extruded tube manufactured by a hot extrusion method is used as a raw tube. This extruded tube is manufactured as a long tube longer than the raw tube length in terms of efficiency and the like, and is cut into a short tube having a length convenient for rolling before being subjected to cold tube rolling.
【0003】このような押出し管の切断では、能率の点
から複数の管切断機を用いて複数本の素材を同時並行し
て切断する場合が多い。このような同時並行切断および
その切断における材料搬送方法を図1により説明する。
同時並行切断では、並列配置された複数の管切断機1が
用いられる。個々の管切断機1は回転砥石により素材を
一本毎切断する。上工程ラインから送られて来た素材は
入側搬送設備2により複数の管切断機1へ並列供給さ
れ、複数の管切断機1で同時進行的に切断される。切断
を終えた材料は出側搬送設備3により下工程ラインへ搬
出される。In the cutting of such an extruded tube, a plurality of materials are often cut in parallel using a plurality of tube cutters in terms of efficiency. Such a simultaneous and parallel cutting and a method of transporting the material in the cutting will be described with reference to FIG.
In the simultaneous and parallel cutting, a plurality of pipe cutting machines 1 arranged in parallel are used. Each pipe cutting machine 1 cuts a raw material one by one using a rotary grindstone. The raw material sent from the upper process line is supplied in parallel to the plurality of pipe cutting machines 1 by the inlet side transport equipment 2, and is simultaneously cut by the plurality of pipe cutting machines 1. The cut material is carried out to the lower process line by the delivery equipment 3.
【0004】このような同時並行切断では、ロット単位
で送られて来る素材が切断後に他のロットのものと混じ
らないようにするいわゆるロット管理が非常に重要であ
る。そのため、材料の搬送制御方法として「先入れ材先
出し」と呼ばれる方法が一般に採用されている。これは
管切断機へ先に供給した材料を必ず先に管切断機から搬
出するというものである。例えばNo. 1〜3の管切断機
へ素材が順番に供給されるとする。その場合は、No. 1
の管切断機で材料搬出が終わってからNo. 2の管切断機
で材料搬出を行い、それが終わってからNo. 3の管切断
機で材料搬出を始める。In such simultaneous and parallel cutting, what is called a lot management is very important so that a raw material sent in lots is not mixed with another lot after cutting. For this reason, a method called “first-in first-out” is generally adopted as a method for controlling the transport of the material. This means that the material supplied first to the pipe cutting machine is always carried out of the pipe cutting machine first. For example, it is assumed that the materials are sequentially supplied to the pipe cutting machines No. 1 to No. 3. In that case, No. 1
After unloading of the material with the pipe cutting machine of No. 2, the material is unloaded with the pipe cutting machine of No. 2, and after that, the unloading of the material is started with the pipe cutting machine of No. 3.
【0005】特開昭59−97917号公報には、同時
並行切断において物流効率を挙げるために、複数の管切
断機を機動的に選択使用する方法が示されているが、こ
の方法においてもロット管理は最重要項目として取り扱
われている。JP-A-59-97917 discloses a method of flexibly selecting and using a plurality of pipe cutting machines in order to improve the distribution efficiency in simultaneous and parallel cutting. Management is treated as the most important item.
【0006】[0006]
【発明が解決しようとする課題】しかしながら、先入れ
材先出し方式の場合であれ、それ以外の方式の場合であ
れ、ロット管理を優先した従来の搬送制御方法では、次
のような問題がある。However, whether the first-in first-out method or the other method, the conventional transport control method giving priority to lot management has the following problems.
【0007】同時並行切断に使用される複数の管切断機
では、前述したように、管切断に回転砥石が用いられ
る。回転砥石は使用に伴って摩耗し、その摩耗量が限界
値に達すると新しいものと交換される。通常この交換は
管切断機に材料が存在していないときに行うが、押出し
管の切断では管の肉厚が大きく、切断1回りの摩耗量が
大きいこと、1本の素材を複数本に切断する多本採りが
最近の傾向であることながら、切断の途中でその摩耗量
が限界値に達する場合が少なくない。In a plurality of pipe cutting machines used for simultaneous and parallel cutting, as described above, a rotary grindstone is used for pipe cutting. The rotating grindstone wears with use and is replaced with a new one when the amount of wear reaches a limit value. Normally, this exchange is performed when there is no material in the tube cutting machine. However, when cutting extruded tubes, the thickness of the tube is large, the amount of wear per cut is large, and one material is cut into multiple pieces. Despite the recent tendency of multiple picking, the amount of wear reaches a limit during cutting.
【0008】管の切断途中で回転砥石の摩耗量が限界値
に達すると、管切断機を一旦停止してその切断機から切
断途中の材料を取り出し、回転砥石を交換した後に再び
その材料をセットし直し、その後に切断を再開するとい
う手順が必要になる。そのため、回転砥石の交換に通常
の交換より格段に長い時間がかかる。When the wear amount of the rotary grindstone reaches a limit value during the cutting of the pipe, the pipe cutting machine is temporarily stopped, the material being cut is taken out from the cutting machine, and the material is set again after replacing the rotary grindstone. Then, a procedure of restarting the disconnection is required. Therefore, it takes much longer time to replace the rotating grindstone than normal replacement.
【0009】同時並行切断でこのような事態が起きる
と、先入れ材先出しの場合、回転砥石の交換を行う管切
断機でその交換作業が終り材料の再切断および排出が完
了するまで、他の管切断機から材料が排出されない。そ
のため、複数の管切断機が存在するにもかかわらず、全
ての管切断機が長い時間停止し、移動率の著しい低下を
招く。[0009] When such a situation occurs in simultaneous and parallel cutting, in the case of first-in first-out material, the exchanging operation is completed by a tube cutting machine for exchanging a rotating grindstone, and until the re-cutting and discharging of the material is completed, another cutting is performed. No material is discharged from the tube cutting machine. Therefore, despite the existence of a plurality of pipe cutting machines, all the pipe cutting machines are stopped for a long time, resulting in a significant decrease in the transfer rate.
【0010】回転砥石が寿命に達した特定の管切断機で
回転砥石を交換するときに、先入れ材先出しの制御を中
断し、他の管切断機で切断を続けたとしても、特定の管
切断機に前ロットの材料が残っているため、回転砥石の
交換が終わってその材料が排出されるまで次ロットの材
料を処理することが不可能である。従って、やはり待ち
時間による移動率低下が避けられない。[0010] When the rotary grindstone is replaced with a specific tube cutting machine whose life has reached the end of its life, even if the control of first-in first-out material is interrupted and cutting is continued by another pipe cutting machine, the specific pipe is cut. Since the material of the previous lot remains in the cutting machine, it is impossible to process the material of the next lot until the replacement of the grindstone is completed and the material is discharged. Therefore, a decrease in the transfer rate due to the waiting time is inevitable.
【0011】特開昭59−97917号公報に示された
方法では、切断途中で回転砥石を交換することが考慮さ
れていないので、同様の問題が生じると考えられる上、
ロット管理以外の要件も考慮しているので、切断途中で
回転砥石を交換するというような予期せぬ事態が生じた
ときには、ロット管理が不完全になる危険性を否定でき
ない。In the method disclosed in Japanese Patent Application Laid-Open No. 59-97917, it is considered that the same problem occurs because the exchange of the rotating grindstone during the cutting is not considered.
Since the requirements other than the lot management are also taken into consideration, it is not possible to deny the risk that the lot management will be incomplete when an unexpected situation occurs, such as replacing the grindstone during cutting.
【0012】本発明の目的は、ロット管理を完全に行
い、なおかつ回転砥石の交換に伴う移動率の低下を最小
限に抑えることができる管切断機への素材供給方法を提
供することにある。An object of the present invention is to provide a method of supplying a material to a pipe cutting machine which can completely perform lot management and can minimize a decrease in a moving rate due to replacement of a rotary grindstone.
【0013】[0013]
【課題を解決するための手段】本発明の素材供給方法
は、並列配置されそれぞれが回転砥石を用いて管を一本
毎切断する複数の管切断機へ素材を並列供給して、複数
の管切断機により複数本の素材を同時並行して切断する
際に、各管切断機へ素材が装入される前に各管切断機で
その素材を切断したと仮定したときの回転砥石の摩耗量
を予測して、その仮定切断の途中に摩耗量が使用限界に
達するか否かを判断し、仮定切断の途中に使用限界がく
ることが判明した場合に該当する管切断機への素材供給
を停止し、他の管切断機へのみ素材供給を続けるもので
ある。According to the present invention, there is provided a method for supplying a material, comprising supplying a material in parallel to a plurality of tube cutting machines which are arranged in parallel and each of which cuts one tube at a time using a rotary grindstone. When a plurality of materials are cut by a cutting machine simultaneously in parallel, the amount of wear of the rotary grindstone assuming that each tube cutting machine cuts the material before loading the material into each tube cutting machine To determine whether the wear amount reaches the service limit during the assumed cutting, and if the usage limit is found to be reached during the assumed cutting, supply the material to the applicable pipe cutting machine. It stops and supplies the material only to other pipe cutting machines.
【0014】[0014]
【作用】本発明の素材供給方法では、切断途中に回転砥
石が使用限界に達すると予測された場合、その管切断機
に素材が装入されない。他の管切断機へ素材を供給し続
けることにより、切断作業が続く。切断途中に回転砥石
が使用限界に達すると予測された管切断機では、回転砥
石が交換されるが、ここには材料が存在していないの
で、その交換を短時間で終えることができる。回転砥石
の交換中に他の管切断機で現ロットの処理が終わった場
合、引き続き他の管切断機で次ロットの材料を処理して
も、交換作業中の管切断機に前ロットの材料が残ってい
ないので、ロット管理が不完全になるおそれがない。According to the material supply method of the present invention, if it is predicted that the rotating whetstone will reach the service limit during cutting, no material is loaded into the tube cutting machine. By continuing to supply the material to other tube cutting machines, the cutting operation continues. In a pipe cutting machine in which it is predicted that the rotating grindstone will reach the service limit during cutting, the rotating grindstone is replaced, but since there is no material here, the replacement can be completed in a short time. If the processing of the current lot is completed by another pipe cutting machine during the replacement of the rotary grindstone, the material of the previous lot is transferred to the pipe cutting machine being replaced even if the next lot of material is processed by another pipe cutting machine. Since there is no remaining, there is no possibility that lot management will be incomplete.
【0015】すなわち本発明の素材供給方法では、回転
砥石の交換に伴う移動率の低下は、通常の交換に要する
ロスタイムによるものだけとなり、それ以上に移動率が
低下する事態は回避される。That is, in the material supply method of the present invention, the decrease in the transfer rate due to the replacement of the rotary grindstone is caused only by the loss time required for the normal replacement, and the situation where the transfer rate is further reduced is avoided.
【0016】[0016]
【実施例】以下に本発明の実施例を前述した図1の切断
ラインで実施する場合について説明する。図2はその処
理プロセスを示すフローチャートである。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the case where the present invention is carried out on the cutting line shown in FIG. FIG. 2 is a flowchart showing the processing process.
【0017】本実施例では、素材が基本的に先入れ材先
出し方式により3つの管切断機1に並列搬送される。ま
た、作業の前に管切断機1で1本の素材を切断したとき
の回転砥石の摩耗量(単位摩耗量)を、素材の材質寸法
等に応じて経験的に求めておく。In this embodiment, the material is basically conveyed in parallel to the three pipe cutting machines 1 by the first-in first-out method. In addition, the wear amount (unit wear amount) of the rotating grindstone when one material is cut by the pipe cutting machine 1 before the operation is empirically obtained according to the material dimensions of the material.
【0018】作業が始まると、各管切断機1において素
材が装入される前に素材供給の可否確認を行い、供給可
の場合にその素材を切断したと仮定したときの回転砥石
の累積摩耗量を前記単位摩耗量に基づいて予測する。そ
して予測された累積摩耗量を限界値と比較し、累積摩耗
量が限界値に達しないと判断された場合にのみ、その管
切断機1へ素材を供給する。When the work is started, it is checked whether or not the material can be supplied before the material is loaded in each pipe cutting machine 1, and when the supply is possible, the cumulative wear of the rotary grindstone when it is assumed that the material has been cut. The amount is predicted based on the unit wear amount. Then, the predicted cumulative wear amount is compared with the limit value, and the material is supplied to the pipe cutting machine 1 only when it is determined that the cumulative wear amount does not reach the limit value.
【0019】3つの管切断機1のいずれにおいてもこの
状態が続くときは、それらの管切断機1に材料が先入れ
材先出し方式により搬送される。すなわち、No. 1,
2,3の順で素材供給が行われた場合、No. 1から材料
が排出された後、その管切断機に素材を供給すると共
に、No. 2から材料を排出する。No. 2からの材料排出
が終わると、その管切断機に素材を供給すると共に、N
o. 3から材料を排出する。When this state continues in any of the three pipe cutting machines 1, the material is conveyed to these pipe cutting machines 1 by the first-in first-out method. That is, No. 1,
When the material is supplied in the order of 2 and 3, after the material is discharged from No. 1, the material is supplied to the tube cutting machine and the material is discharged from No. 2. After discharging the material from No. 2, supply the material to the tube cutting machine and
o. Discharge material from 3.
【0020】3つの管切断機1のうちの1つ、例えばN
o. 1で材料の切断排出が終り、次の素材に対して回転
砥石の累積摩耗量が限界値に達すると判断された場合
は、その素材をNo. 1に供給せず、No. 2または3へ回
す。No. 2,3で累積摩耗量が限界値に達しないと判断
されている場合は、その2つの管切断機を用いて先入れ
材先出し方式により材料の処理を続ける。そして、No.
1では回転砥石の交換作業を行う。One of the three tube cutters 1, for example N
o. When the cutting and discharging of the material is completed in 1 and it is determined that the cumulative wear amount of the rotary grindstone reaches the limit value for the next material, the material is not supplied to No. 1 and No. 2 or Turn to 3. If it is determined in Nos. 2 and 3 that the accumulated wear amount does not reach the limit value, the processing of the material is continued by the first-in, first-out method using the two pipe cutting machines. And No.
In step 1, the replacement work of the rotary grindstone is performed.
【0021】かくして、回転砥石の交換中もその管切断
機以外で材料切断が続けられ、移動率が向上する。ま
た、回転砥石の交換を行うNo. 1では、素材の装入が未
然に停止され材料が残っていないので、通常交換と同じ
短い時間で交換作業を終えることができ、これも移動率
の向上に寄与する。Thus, even during the replacement of the rotary grindstone, the cutting of the material is continued by means other than the tube cutting machine, and the transfer rate is improved. In addition, in No. 1 where the rotating whetstone is replaced, charging of the material is stopped beforehand and no material remains, so the replacement work can be completed in the same short time as normal replacement, which also improves the transfer rate. To contribute.
【0022】No. 1で回転砥石の交換が終わったとき
に、現ロットの材料処理が続いている場合は、3つの管
切断機を用いて残りの材料の処理を続ける。回転砥石の
交換中に現ロットの材料の処理が終わってしまった場合
は、交換中であっても他の2つの管切断機、すなわちN
o. 2,3を用いて次ロットの材料の切断を開始する。
そうしたとしても、No. 1に前ロットの材料が残ってい
ないので、ロット管理が不完全になるおそれはない。そ
うすることにより、No. 1での交換作業の終了を待った
ことなく連続してNo. 2,3で次ロット材の処理が開始
され、移動率が更に向上する。When the processing of the material in the current lot is continued when the replacement of the rotary grindstone is completed in No. 1, the processing of the remaining material is continued using three tube cutting machines. If the processing of the current lot material has been completed during the replacement of the grinding wheel, the other two pipe cutting machines, namely N
o Start cutting the next lot of material using steps 2 and 3.
Even so, there is no possibility that the lot management will be incomplete because no material of the previous lot remains in No. 1. By doing so, the processing of the next lot material is continuously started in Nos. 2 and 3 without waiting for the completion of the replacement work in No. 1 and the transfer rate is further improved.
【0023】[0023]
【発明の効果】以上に説明した通り、本発明の素材供給
方法は、並列配置された複数の管切断機を用いて同時並
行切断を行う場合に、回転砥石の交換作業中も現ロット
の材料の経済処理を可能にする。更に現ロットだけでな
く次ロットの材料についても継続した処理を可能にす
る。しかも回転砥石の交換時間の短縮を可能にする。従
って、管切断機の移動率を大幅に向上させることができ
る。また、次ロット材を継続処理した場合にロット管理
が不完全になるおそれがない。As described above, according to the material supply method of the present invention, when simultaneous and parallel cutting is performed using a plurality of tube cutters arranged in parallel, the material of the current lot can be replaced even during the replacement work of the rotary grindstone. Enables economic processing. Further, it is possible to continuously process the material of the next lot as well as the current lot. In addition, the replacement time of the rotating grindstone can be reduced. Therefore, the moving rate of the pipe cutting machine can be greatly improved. Further, when the next lot material is continuously processed, there is no possibility that the lot management becomes incomplete.
【図1】同時並行切断を行う管切断設備の構成例を示す
レイアウト図である。FIG. 1 is a layout diagram illustrating a configuration example of a pipe cutting facility that performs simultaneous and parallel cutting.
【図2】本発明の実施例における処理プロセスを示すフ
ローチャートである。FIG. 2 is a flowchart showing a processing process according to the embodiment of the present invention.
1 管切断機 2 入側搬送設備 3 出側搬送設備 1 Pipe cutting machine 2 Inlet transport equipment 3 Outlet transport equipment
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6,DB名) B24B 27/06 B24B 41/06 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) B24B 27/06 B24B 41/06
Claims (1)
て管を1本毎切断する複数の管切断機へ素材を並列供給
して、複数の管切断機により複数本の素材を同時並行し
て切断する際に、 各管切断機へ素材が装入される前に各管切断機でその素
材を切断したと仮定したときの回転砥石の摩耗量を予測
して、その仮定切断の途中に摩耗量が使用限界に達する
か否かを判断し、仮定切断の途中に使用限界がくること
が判明した場合に該当する管切断機への素材供給を停止
し、他の管切断機へのみ素材供給を続けることを特徴と
する管切断機への素材供給方法。1. A material is supplied in parallel to a plurality of tube cutting machines which are arranged in parallel and each of which cuts a tube one by one using a rotary grindstone, and a plurality of materials are simultaneously and concurrently processed by the plurality of tube cutting machines. When cutting, predict the amount of wear of the rotating grindstone when assuming that the material was cut by each pipe cutting machine before loading the material into each pipe cutting machine, and wear it during the assumed cutting. Judge whether the amount reaches the usage limit.If it becomes clear that the usage limit will be reached during the assumed cutting, stop supplying the material to the corresponding pipe cutting machine and supply the material only to other pipe cutting machines. Material supply method to a pipe cutting machine, characterized by continuing.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3604895A JP2871512B2 (en) | 1995-01-31 | 1995-01-31 | Material supply method to pipe cutting machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3604895A JP2871512B2 (en) | 1995-01-31 | 1995-01-31 | Material supply method to pipe cutting machine |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH08206954A JPH08206954A (en) | 1996-08-13 |
JP2871512B2 true JP2871512B2 (en) | 1999-03-17 |
Family
ID=12458834
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3604895A Expired - Fee Related JP2871512B2 (en) | 1995-01-31 | 1995-01-31 | Material supply method to pipe cutting machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2871512B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE50015912D1 (en) * | 1999-07-15 | 2010-06-10 | Clariant Produkte Deutschland | Water-soluble polymers and their use in cosmetic and pharmaceutical compositions |
JP7412996B2 (en) * | 2019-12-10 | 2024-01-15 | 株式会社ディスコ | grinding equipment |
-
1995
- 1995-01-31 JP JP3604895A patent/JP2871512B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH08206954A (en) | 1996-08-13 |
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