JP3617086B2 - Metal strip shearing method - Google Patents

Metal strip shearing method Download PDF

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Publication number
JP3617086B2
JP3617086B2 JP23508694A JP23508694A JP3617086B2 JP 3617086 B2 JP3617086 B2 JP 3617086B2 JP 23508694 A JP23508694 A JP 23508694A JP 23508694 A JP23508694 A JP 23508694A JP 3617086 B2 JP3617086 B2 JP 3617086B2
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JP
Japan
Prior art keywords
shearing
meandering
sheet
steel strip
shearing machine
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
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JP23508694A
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Japanese (ja)
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JPH0890333A (en
Inventor
元宏 吉村
忠明 八角
忠男 西山
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JFE Steel Corp
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JFE Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Priority to JP23508694A priority Critical patent/JP3617086B2/en
Publication of JPH0890333A publication Critical patent/JPH0890333A/en
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Description

【0001】
【産業上の利用分野】
本発明は、鋼帯等の金属帯をコイルから巻き戻して剪断機により所定長さに剪断する金属帯の剪断方法に関する。
【0002】
【従来の技術】
まず、本発明に係わる金属帯の剪断ラインの構成を鋼帯剪断ラインの例により図4、図5を用いて説明する。図4は剪断ライン主要部分の正面図、図5は同じく平面図で、1はメジャリングロール、2はレベラ、3はピンチロール、4は剪断機、5、6、7はベルトコンベヤ、Sは鋼帯、Cは剪断後のシートである。図示しない巻き戻し機によりコイルから巻き戻された鋼帯Sはピンチロール1、3により左方向に送り出され、レベラ2によって矯正され、剪断機4により剪断されてシートCとなり、ベルトコンベヤ5、6、7上を搬送されて図示しないパイラに積み重ねられ、ロット毎にまとめられて梱包、出荷される。
【0003】
ここで、剪断機4における剪断は鋼帯Sを一定速度で移動させたままで行うロータリーシヤ等のフライングシヤ方式が一般的であり、また、剪断後のシートCを後方の鋼帯と分離させるため、剪断機出側コンベヤは後方の鋼帯の移動速度よりも若干高速に設定されており、同様に下流における検査、級別に便利なようにシートCの間隔を広げるため、ベルトコンベヤ5、6、7の速度は順次高くなるように設定されているのが普通である。
【0004】
剪断ラインにおける寸法精度不良としては、剪断長の不揃いとともに、剪断面の直角度不良がある。剪断面の直角度不良は、鋼帯の形状自体が悪い場合と、鋼帯が蛇行している場合に発生する。
剪断面の直角度不良を解消するには、剪断面の直角度を検出し、これを是正する手段が必要である。
【0005】
まず、シートは正しく直角に剪断されているものとすると、図6に示すような方法で搬送中のシートの蛇行量(以下、角度の場合「傾斜角」という)を測定することができる。
シートの搬送方向と直角方向に、所定間隔Wを以て検出器A、Bを設け、搬送されるシートSの前縁Eが検出器Aを通過する時点と検出器Bを通過する時点との時間差tを検知すれば、シートSの搬送速度vから図に示すLは、
L = vt
であり、このLとWから、
α = tan −1(L/W)
によって傾斜角αを求めることができる。
【0006】
図7は、特開昭55−67606号公報に記載の鋼板の直角度測定方法を示すもので、図6で説明した原理に基づき、搬送中の鋼板の傾斜角とともに鋼板自身の直角度をも測定しようとするもので、シートの搬送方向と直角方向の同一直線上に、所定間隔Wを以て検出器A、Bを、所定間隔Wを以て検出器C、Dを設け、
搬送されるシートSの前縁Eが検出器Aを通過する時点と検出器Bを通過する時点との時間差tと、
シートSの後縁Eが検出器Aを通過する時点と検出器Bを通過する時点との時間差tと、
シートSの側縁Eが検出器Cを通過する時点と検出器Dを通過する時点との時間差t
をそれぞれ検出し、これらの各時間差とシートSの搬送速度vから、
= vt
= vt
= vt
α = tan −1(W/L
θ = tan −1(L/W)−α
φ = tan −1(L/W)+α
の各式によって蛇行量(傾斜角)α、シートSの前縁Eの直角度θ、シートSの後縁Eの直角度φを算出するのである。
【0007】
また、特開平5−116021号公報には、蛇行量の計測結果に基づき、剪断シートの直角度を制御する方法が記載されている。すなわち、剪断前の鋼帯に対して、図8に示すように、上下一対のピンチロールのロール軸方向の圧下力分布を変更することにより、鋼帯を幅方向に移動させて粗調整を行うとともに、鋼帯に対して上側または下側に配置された図示しないゴムロールを軸直角方向に押し込むことによって、鋼帯を幅方向に移動させて微調整を行うのである。
【0008】
しかし、たとえば剪断後のシートについて、コンベヤ上で直角度を測定したのでは、そのシート自体の直角度を是正することはできず、蛇行原因の確認や蛇行量の修正も困難である。また、剪断前に蛇行を修正する方法では、剪断時に発生する直角度不良に対しては、その修正ができないという、欠点がある。
【0009】
【発明が解決しようとする課題】
本発明は、このような問題点を解消し、剪断時点におけるシートの蛇行を検出し、剪断機に対してシートを正しい直角方向に修正した上で剪断を行う金属帯の剪断方法を提供することを目的とする。
【0010】
【課題を解決するための手段】
本発明は、金属帯を所定長さに剪断してシートとする剪断ラインにおいて、剪断機の入側および出側に、金属帯の幅方向の位置を検出する蛇行量検出器を設置し、検出された金属帯の蛇行量により、剪断機出側に設けられたベルトコンベヤ内に配置した磁石の磁力を幅方向に変化させて金属帯の蛇行を修正した上で剪断を行うことを特徴とする金属シートの剪断方法であり、さらに具体的には、ベルトコンベヤ内に配置した磁石の磁力を次式のxに比例して幅方向に変化させる前記の金属帯の剪断方法である。
【0011】
x = (a−a)W/b
但し、a、a:剪断機の入側および出側における金属帯の幅方向の位置
W:金属帯の幅、
b:剪断機の入側および出側の蛇行量検出器の距離。
【0012】
【作 用】
本発明によれば、剪断機の入側および出側に、金属帯の幅方向の位置を検出する蛇行量検出器を設置し、剪断機の入側および出側における金属帯の幅方向の位置を検出すると、その差として金属帯の蛇行量が検出できるので、この蛇行量に応じて出側ベルトコンベヤに幅方向に対をなして配置した磁石の磁力を調整して剪断直前に金属帯の蛇行量を是正した上で剪断を行うから、シートの直角度が向上するとともに、出側ベルトコンベヤ上を搬送されるシートにも蛇行がなく、パイラ等の下流設備においてもトラブルのない処理を行うことができる。
【0013】
【実施例】
本発明の実施例を図1〜3により説明する。図1はこの実施例の鋼帯剪断ラインにおける剪断機付近を示す正面図、図2は同じく平面図である。符号はこれまでの説明と共通するものについては同じものを使用し、8、9はサポートロール、10(10a 、10b)はベルトコンベヤ5の裏面に設置された一対の電磁石、11はベルトコンベヤ6の裏面に設置された永久磁石、12、13は剪断機4の前面および後面に配置された蛇行量検出器、14は制御器である。
【0014】
図3(a)は蛇行状態にある鋼帯Sを示す説明図である。前記したように、蛇行量検出器12、13は剪断機4の前後に配置されている。剪断前の鋼帯Sの先端が蛇行量検出器12を通過した時点で検出された鋼帯Sとの距離をa、このときの蛇行量検出器13による鋼帯Sとの距離をa、蛇行量検出器12、13の距離をb、鋼帯Sの幅をWとすると、この鋼帯の蛇行傾向は(a−a)の符号および大きさによって知ることができ、さらに、蛇行量xの絶対量は、
x = (a−a)W/b
で算出できる。
【0015】
仮にこのまま剪断を行うとすると、図3(a)におけるXX線が剪断機4の剪断線であるから、剪断線、すなわちシートの縁は直角方向に対して傾斜角αだけ傾斜したものとなる。
いま、鋼帯Sがこの図のようにオペレータ側(図3の上側)に向かって蛇行していた場合(a<a)、図2に示す剪断前の鋼帯Sの先端部分が載置されている剪断機出側の第1のベルトコンベヤ5において、ベルトコンベヤ5の裏面に設置された一対の電磁石のうち、オペレータ側のもの10b の磁力を、ドライブ側のもの10a に対して上記のxに比例した分だけ強くする。ベルトコンベヤ5の移動速度は、剪断機4入側もやや速く設定されているので、鋼帯Sは電磁石10b に引きつけられてオペレータ側の方が移動量が多くなり、蛇行は是正され、図3(b)に示すように、a=aとなった時点で剪断を行うようにすると、切断線XXにより、正しく直角に剪断が行われる。
【0016】
検出された蛇行量がa>aの場合は、逆にベルトコンベヤ5の裏面に設置された一対の電磁石のうち、ドライブ側のもの10a の磁力を強くする。以上の演算および制御は制御器14において行う。
以上説明したように本発明では、鋼帯Sの先端が剪断機の出側に設置した蛇行量検出器13位置に進入した時点から剪断が完了するまでの間に蛇行量を修正するようにしたから、剪断時における直角度が向上し、直角外れによる不良品発生率を約 0.2%低下させることができた。
【0017】
【発明の効果】
本発明によれば、コンベヤ上で剪断直前に鋼帯の蛇行を修正した上で剪断を行うことにより、シートの直角不良が減少するとともに、蛇行なしにベルトコンベヤ上を移送されるので、サイドガイド装置等によるシート端縁部の疵発生も減少するなどのすぐれた効果を奏する。
【図面の簡単な説明】
【図1】本発明の実施例における鋼帯剪断ラインの主要部を示す正面図である。
【図2】本発明の実施例における鋼帯剪断ラインの主要部を示す平面図である。
【図3】本発明の実施例における鋼帯の蛇行状態を示す説明図である。
【図4】本発明に係わる鋼帯剪断ラインの主要部を示す正面図である。
【図5】本発明に係わる鋼帯剪断ラインの主要部を示す平面図である。
【図6】従来の技術における鋼帯の蛇行状態を示す説明図である。
【図7】他の従来の技術における鋼帯の蛇行状態を示す説明図である。
【図8】さらに他の従来の技術を示す斜視図である。
【符号の説明】
1 メジャリング
2 レベラ
3 ピンチロール
4 剪断機
5、6、7 ベルトコンベヤ
8、9 サポートロール
10 電磁石
11 永久磁石
12、13 蛇行量検出器
14 制御器
S 鋼帯
C シート
[0001]
[Industrial application fields]
The present invention relates to a metal band shearing method in which a metal band such as a steel band is unwound from a coil and sheared to a predetermined length by a shearing machine.
[0002]
[Prior art]
First, the structure of the metal line shear line according to the present invention will be described with reference to FIGS. 4 is a front view of the main part of the shear line, FIG. 5 is also a plan view, 1 is a measuring roll, 2 is a leveler, 3 is a pinch roll, 4 is a shearing machine, 5, 6 and 7 are belt conveyors, S is Steel strip C is a sheet after shearing. The steel strip S unwound from the coil by a rewinding machine (not shown) is fed leftward by the pinch rolls 1 and 3, corrected by the leveler 2, sheared by the shearing machine 4 into a sheet C, and the belt conveyors 5 and 6. 7 are stacked on a pillar (not shown), and are packed and shipped together for each lot.
[0003]
Here, the shearing in the shearing machine 4 is generally performed by a flying shearing method such as a rotary shearing while the steel strip S is moved at a constant speed, and the sheet C after shearing is separated from the rear steel strip. The conveyor on the outlet side of the shearing machine is set at a slightly higher speed than the moving speed of the rear steel strip. Similarly, in order to widen the interval between the sheets C for convenient inspection and classification downstream, Normally, the speed of 7 is set to increase sequentially.
[0004]
As dimensional accuracy defects in the shear line, there are shear angle unevenness and perpendicularity of the shear plane. The perpendicularity failure of the shear plane occurs when the shape of the steel strip itself is bad and when the steel strip is meandering.
In order to eliminate the perpendicularity failure of the shearing surface, a means for detecting the perpendicularity of the shearing surface and correcting it is necessary.
[0005]
First, assuming that the sheet is correctly sheared at a right angle, the meandering amount of the sheet being conveyed (hereinafter referred to as “inclination angle” in the case of an angle) can be measured by the method shown in FIG.
Detectors A and B are provided at a predetermined interval W in a direction perpendicular to the sheet conveyance direction, and the time difference t between the time when the leading edge E of the conveyed sheet S passes the detector A and the time when it passes the detector B , L shown in the figure from the conveyance speed v of the sheet S is
L = vt
From this L and W,
α = tan −1 (L / W)
Can determine the inclination angle α.
[0006]
FIG. 7 shows a method for measuring the squareness of a steel sheet described in JP-A-55-67606. Based on the principle explained in FIG. 6, the squareness of the steel sheet itself is measured together with the inclination angle of the steel sheet being conveyed. The detectors A and B are provided at a predetermined interval W 1 and the detectors C and D are provided at a predetermined interval W 2 on the same straight line perpendicular to the sheet conveyance direction.
A time difference t 1 between the time when the leading edge E 1 of the conveyed sheet S passes the detector A and the time when it passes the detector B;
A time difference t 2 between the time when the trailing edge E 2 of the sheet S passes the detector A and the time when it passes the detector B;
A time difference t 3 between a time point when the side edge E 3 of the sheet S passes the detector C and a time point when the side edge E 3 passes the detector D is detected, and from each time difference and the conveyance speed v of the sheet S,
L 1 = vt 1
L 2 = vt 2
L 3 = vt 3
α = tan −1 (W 2 / L 3 )
θ = tan −1 (L 1 / W 1 ) −α
φ = tan −1 (L 2 / W 1 ) + α
The meandering amount (inclination angle) α, the perpendicular angle θ of the leading edge E 1 of the sheet S, and the perpendicular angle φ of the trailing edge E 2 of the sheet S are calculated by the following equations.
[0007]
Japanese Patent Application Laid-Open No. 5-116021 describes a method for controlling the perpendicularity of a shear sheet based on the measurement result of the meandering amount. That is, as shown in FIG. 8, with respect to the steel strip before shearing, by changing the rolling force distribution in the roll axis direction of the pair of upper and lower pinch rolls, the steel strip is moved in the width direction to perform coarse adjustment. At the same time, a rubber roll (not shown) disposed on the upper side or the lower side of the steel strip is pushed in the direction perpendicular to the axis, whereby the steel strip is moved in the width direction for fine adjustment.
[0008]
However, for example, if the squareness of a sheet after shearing is measured on a conveyor, the squareness of the sheet itself cannot be corrected, and it is difficult to confirm the cause of meandering and to correct the meandering amount. Further, the method of correcting the meandering before shearing has a drawback that the perpendicularity defect that occurs during shearing cannot be corrected.
[0009]
[Problems to be solved by the invention]
The present invention provides a metal band shearing method that solves such problems, detects the meandering of the sheet at the time of shearing, corrects the sheet to the right angle with respect to the shearing machine, and then performs shearing. With the goal.
[0010]
[Means for Solving the Problems]
In the present invention, a meandering amount detector for detecting the position in the width direction of the metal band is installed on the inlet side and the outlet side of the shearing machine in the shear line that shears the metal band to a predetermined length to form a sheet. According to the meandering amount of the metal band, the magnetic force of the magnet disposed in the belt conveyor provided on the outlet side of the shearing machine is changed in the width direction to correct the meandering of the metal band, and then shearing is performed. This is a metal sheet shearing method, and more specifically, the metal band shearing method in which the magnetic force of a magnet disposed in a belt conveyor is changed in the width direction in proportion to x in the following equation.
[0011]
x = (a 1 −a 2 ) W / b
Where a 1 , a 2 : position in the width direction of the metal band on the entry side and the exit side of the shearing machine W: width of the metal band,
b: Distance between meandering detectors on the inlet side and outlet side of the shearing machine.
[0012]
[Operation]
According to the present invention, meandering amount detectors for detecting the position in the width direction of the metal strip are installed on the entry side and the exit side of the shearing machine, and the position in the width direction of the metal strip on the entry side and the exit side of the shearing machine. Therefore, the amount of meandering of the metal band can be detected as the difference, and the magnetic force of the magnet arranged in a pair in the width direction on the output belt conveyor is adjusted according to the amount of meandering, and the metal band just before shearing is adjusted. Since the shearing is performed after correcting the meandering amount, the perpendicularity of the sheet is improved, the sheet conveyed on the delivery belt conveyor is not meandering, and trouble-free processing is performed even in downstream equipment such as a pillar. be able to.
[0013]
【Example】
An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a front view showing the vicinity of a shearing machine in the steel strip shearing line of this embodiment, and FIG. 2 is a plan view of the same. The reference numerals are the same as those used in the description so far, 8, 9 are support rolls, 10 (10a, 10b) are a pair of electromagnets installed on the back surface of the belt conveyor 5, 11 is the belt conveyor 6 The permanent magnets 12 and 13 are disposed on the front and rear surfaces of the shearing machine 4, and 14 is a controller.
[0014]
Fig.3 (a) is explanatory drawing which shows the steel strip S in a meandering state. As described above, the meandering amount detectors 12 and 13 are disposed before and after the shearing machine 4. The distance from the steel strip S detected when the tip of the steel strip S before shearing passes through the meandering amount detector 12 is a 1 , and the distance from the steel strip S by the meandering amount detector 13 at this time is a 2 When the distance between the meandering detectors 12 and 13 is b and the width of the steel strip S is W, the meandering tendency of the steel strip can be known by the sign and size of (a 1 -a 2 ), The absolute amount of meandering amount x is
x = (a 1 −a 2 ) W / b
It can be calculated by
[0015]
If shearing is performed as it is, the XX line in FIG. 3A is the shearing line of the shearing machine 4, and therefore the shearing line, that is, the edge of the sheet, is inclined by the inclination angle α with respect to the perpendicular direction.
If the steel strip S meanders toward the operator side (upper side in FIG. 3) as shown in this figure (a 1 <a 2 ), the tip of the steel strip S before shearing shown in FIG. Among the pair of electromagnets installed on the back surface of the belt conveyor 5, the magnetic force of the operator-side one 10b is applied to the drive-side one 10a in the first belt conveyor 5 on the shearing machine exit side. Strengthen by an amount proportional to x. Since the moving speed of the belt conveyor 5 is set slightly faster on the inlet side of the shearing machine 4, the steel strip S is attracted to the electromagnet 10b, and the moving amount on the operator side increases, and the meandering is corrected. As shown in (b), when shearing is performed when a 1 = a 2 , shearing is performed at right angles by the cutting line XX.
[0016]
When the detected meandering amount is a 1 > a 2 , the magnetic force of the drive-side one 10a among the pair of electromagnets installed on the back surface of the belt conveyor 5 is increased. The above calculation and control are performed by the controller 14.
As described above, in the present invention, the meandering amount is corrected from the time when the tip of the steel strip S enters the meandering amount detector 13 installed on the exit side of the shearing machine until the shearing is completed. As a result, the perpendicularity during shearing was improved, and the incidence of defective products due to a right angle deviation was reduced by about 0.2%.
[0017]
【The invention's effect】
According to the present invention, by correcting the meandering of the steel strip immediately before shearing on the conveyor and then performing shearing, the right angle defect of the sheet is reduced and the belt conveyor is transported without meandering. Excellent effects such as reduction of wrinkles at the edge of the sheet by the apparatus or the like can be obtained.
[Brief description of the drawings]
FIG. 1 is a front view showing a main part of a steel strip shear line in an embodiment of the present invention.
FIG. 2 is a plan view showing a main part of a steel strip shear line in an embodiment of the present invention.
FIG. 3 is an explanatory view showing a meandering state of a steel strip in an embodiment of the present invention.
FIG. 4 is a front view showing a main part of a steel strip shearing line according to the present invention.
FIG. 5 is a plan view showing a main part of a steel strip shear line according to the present invention.
FIG. 6 is an explanatory view showing a meandering state of a steel strip in the prior art.
FIG. 7 is an explanatory view showing a meandering state of a steel strip in another conventional technique.
FIG. 8 is a perspective view showing still another conventional technique.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Measuring 2 Leveler 3 Pinch roll 4 Shearing machine 5, 6, 7 Belt conveyor 8, 9 Support roll 10 Electromagnet 11 Permanent magnet 12, 13 Meander amount detector 14 Controller S Steel strip C Sheet

Claims (2)

金属帯を所定長さに剪断してシートとする剪断ラインにおいて、剪断機の入側および出側に、金属帯の幅方向の位置を検出する蛇行量検出器を設置し、検出された金属帯の蛇行量により、剪断機出側に設けられたベルトコンベヤ内に配置した磁石の磁力を幅方向に変化させて金属帯の蛇行を修正した上で剪断を行うことを特徴とする金属シートの剪断方法。In a shear line that shears the metal strip to a predetermined length to form a sheet, meandering amount detectors that detect the position in the width direction of the metal strip are installed on the entry side and the exit side of the shearing machine, and the detected metal strip The shearing of the metal sheet is characterized by performing the shearing after correcting the meandering of the metal band by changing the magnetic force of the magnet arranged in the belt conveyor provided on the exit side of the shearing machine according to the amount of meandering of the metal belt. Method. ベルトコンベヤ内に配置した磁石の磁力を次式のxに比例して幅方向に変化させる請求項1に記載の金属帯の剪断方法。
x = (a−a)W/b
但し、a、a:剪断機の入側および出側における金属帯の幅方向の位置
W:金属帯の幅、
b:剪断機の入側および出側の蛇行量検出器の距離。
The method of shearing a metal strip according to claim 1, wherein the magnetic force of the magnet disposed in the belt conveyor is changed in the width direction in proportion to x of the following equation.
x = (a 1 −a 2 ) W / b
Where a 1 , a 2 : position in the width direction of the metal band on the entry side and the exit side of the shearing machine W: width of the metal band,
b: Distance between meandering detectors on the inlet side and the outlet side of the shearing machine.
JP23508694A 1994-09-29 1994-09-29 Metal strip shearing method Expired - Fee Related JP3617086B2 (en)

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Application Number Priority Date Filing Date Title
JP23508694A JP3617086B2 (en) 1994-09-29 1994-09-29 Metal strip shearing method

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Application Number Priority Date Filing Date Title
JP23508694A JP3617086B2 (en) 1994-09-29 1994-09-29 Metal strip shearing method

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JPH0890333A JPH0890333A (en) 1996-04-09
JP3617086B2 true JP3617086B2 (en) 2005-02-02

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Cited By (1)

* Cited by examiner, † Cited by third party
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CN102699409A (en) * 2012-05-07 2012-10-03 厦门正黎明冶金机械有限公司 Automatic mountain wallboard shearing machine

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CN105401188B (en) * 2015-12-15 2018-05-08 中冶南方工程技术有限公司 Electroplating work procedure band steel deviation correcting device
CN106735532B (en) * 2016-12-08 2018-08-10 无锡市东赫金属制品有限公司 A kind of copper strips cutting machine with waste residue collecting function
CN108057923A (en) * 2017-12-11 2018-05-22 广州本金机电设备有限公司 A kind of high precision numerical control stop trimming arrange unit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102699409A (en) * 2012-05-07 2012-10-03 厦门正黎明冶金机械有限公司 Automatic mountain wallboard shearing machine

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