JPS6161756A - Grinding method of butt welding part by means of laser beam for special steel trip and device thereof - Google Patents

Grinding method of butt welding part by means of laser beam for special steel trip and device thereof

Info

Publication number
JPS6161756A
JPS6161756A JP59179318A JP17931884A JPS6161756A JP S6161756 A JPS6161756 A JP S6161756A JP 59179318 A JP59179318 A JP 59179318A JP 17931884 A JP17931884 A JP 17931884A JP S6161756 A JPS6161756 A JP S6161756A
Authority
JP
Japan
Prior art keywords
grinding
finishing
grindstone
rough
laser beam
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.)
Pending
Application number
JP59179318A
Other languages
Japanese (ja)
Inventor
Yoshito Kawai
義人 河合
Hisanao Nakahara
中原 久直
Masaki Aihara
正樹 相原
Noboru Tsuruta
弦田 登
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
Original Assignee
Kawasaki 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
Application filed by Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP59179318A priority Critical patent/JPS6161756A/en
Publication of JPS6161756A publication Critical patent/JPS6161756A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00Materials to be soldered, welded or cut
    • B23K2103/02Iron or ferrous alloys
    • B23K2103/04Steel or steel alloys

Landscapes

  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Laser Beam Processing (AREA)

Abstract

PURPOSE:To secure a smooth weld with nonconcentration of stress, by first grinding the weld of special steel strips connected by laser beam welding with a grinding wheel large in grains size and then grinding it with such one as being small in the grain size. CONSTITUTION:Sf shows a preceding strip, Sb a succeeding strip and W a weld line after being welded by laser beam, respectively. A rough grinding device is provided with a rough grinding wheel 1a at 1a-10a while a finish grinding device with a finishing grinding wheel 1b at 1b-10b in the same construction, respectively, and both are situated at the upper side of these strips. At the underside of the strip, there is possible for only finish grinding. And, each grinding wheel is moved along a weld line W pointing to a steel strip width direction, thus grinding takes place. In this case, the moving direction is made to be such one as being ground first with the rough grinding wheel 1a and then with the finish grinding wheel 1b. With this constitution, at various continuous welding line for these steel strips, stop time at the lead-in side of a line is shortened, whereby continuous feed to a processing section is performable and, what is more, there is no plate breakdown, thus rolling and bending are attainable and not only productivity but yield rate are improved.

Description

【発明の詳細な説明】 C産業上の利用分野) 本発明は、調帯特に高炭素鋼や高珪素鋼、高合金等の特
殊銅鋼帯についてのレーザー溶接部の研削技術に関して
の提案である。
[Detailed Description of the Invention] Field of Industrial Application) The present invention is a proposal regarding a grinding technology for laser welded parts of special copper steel strips such as high-carbon steel, high-silicon steel, and high-alloy steel. .

(従来の技術] 一般に2!!続処理ラインにあっては、例えば普通1シ
1−帯だと、先行する調帯の尾端と後行する調帯の先端
とを溶接することにより、酸洗圧延等の各処理セクショ
ンに連続して供給することが比較的簡単である。その溶
接方法にしても、フラッシュバット溶接、M工G溶接、
TIG溶接などの突合わせ溶接、あるいはシーム溶接な
どの重ね溶接が利用でき、前者は厚物用として、後者は
薄物用として用いられる。
(Prior art) In general, in a 2!!!! series processing line, for example, in the case of 1 sheet and 1 belt, the tail end of the leading belt and the tip of the trailing belt are welded together. It is relatively easy to continuously supply to each processing section such as washing and rolling.The welding methods include flash butt welding, M-G welding,
Butt welding such as TIG welding or lap welding such as seam welding can be used, the former being used for thick materials and the latter for thin materials.

ところで、このような従来の突合わせ溶接により熱延鋼
帯を溶接すると熱影響部および余盛りか非常に大きく、
後工程のロール等の各佛器を損傷させるため、ビードグ
ラインダー、ピードトリマー等により手入れを行ってい
る。このようにして手入れした普通鋼の熱延鋼帯は、そ
のまま熱延コイルとして巻取っても何ら問題はなく、さ
らに溶接部を含んだままの状態で冷間圧延ができる。た
だし、冷延鋼帯等の薄物用としてのシーム溶接の場合に
は、重ね溶接のため溶接部は切断除失している。
By the way, when hot-rolled steel strips are welded using conventional butt welding, the heat-affected zone and excess heap are very large.
In order to prevent damage to the rolls, etc. in the subsequent process, we use bead grinders, peat trimmers, etc. to clean them. The hot-rolled steel strip of ordinary steel that has been treated in this manner can be wound as a hot-rolled coil as it is without any problem, and furthermore, it can be cold-rolled with the welded part still included. However, in the case of seam welding for thin materials such as cold-rolled steel strips, the welded portion is cut and removed due to lap welding.

(発明が解決しようとする問題点) 上述したように普通鋼の場合にあって)ま、溶接部の影
響による問題点の解決がなされているが、高けい嚢細や
高炭素鋼、高合金製などの特殊鋼については、溶接ある
いは溶接部の手入れが困迩であった。
(Problems to be solved by the invention) As mentioned above, in the case of ordinary steel, the problems caused by the influence of welds have been solved, but in the case of high-capacity thin, high-carbon steel, high-alloy steel, Welding or cleaning of welded parts was difficult for special steels such as steel.

すなわちS高けい素鋼(Si〉3.0%)、高台金g(
0〉o、a%でcr 〉0.3%またはMO〉0.2%
あるいはNi 〉0゜2%)については、従来溶接方法
では溶接ができず、また高炭素鋼(0,4%くC)の場
合でもフラッシュバット溶接による溶接は可能であるが
、熱影響部が大きくかつ溶接部が非常に硬くなって実質
的に研削、切削などの手入れかできないという問題点が
あった。
That is, S high silicon steel (Si>3.0%), high base gold (
0〉o, a% cr〉0.3% or MO〉0.2%
Or Ni 〉0゜2%) cannot be welded using conventional welding methods, and high carbon steel (0.4% C) can be welded by flash butt welding, but the heat affected zone There was a problem in that it was large and the welded part became very hard, so that it could only be maintained by grinding, cutting, etc.

こうした特殊鋼板の溶接は、本発明者らの開発したレー
ザ溶接機により可能となった。この溶接機によれば、集
束させたレーザービームが高密度エネルギーを有するた
め、熱影響部が非常に小さくかつ余盛りが殆んど生じな
い。したがって、従来溶接技術で見られるような溶接部
の手入れを行わすともロール等の機器′fr:損傷させ
ずに、後工程に通板することが可能である。
Welding of such special steel plates was made possible by the laser welding machine developed by the present inventors. According to this welding machine, since the focused laser beam has high density energy, the heat affected zone is extremely small and there is almost no excess buildup. Therefore, even if the welded part is taken care of as seen in conventional welding techniques, it is possible to pass the sheet through the subsequent process without damaging equipment such as rolls.

ただし、高けい#鋼や高炭素ft’4、高台金′Mなど
の材料は非常に脆く、レーザー溶接の場合熱影響部か小
さいとはいえ、特に溶接部は脆くなっており、圧延や曲
げなどの加工ひ行うと、溶tK部の微小な凹凸部が応力
集中源となって鋼帯が破断してしまうという問題点が残
されていた。
However, materials such as high-temperature steel, high carbon ft'4, and high base metal are extremely brittle, and although the heat-affected zone is small in laser welding, the welded part is especially brittle, and rolling and bending When such processing is carried out, the problem remains that the minute irregularities in the molten tK zone become a stress concentration source and the steel strip breaks.

本発明は、まさに上記問題点に鑑み創案した技術であり
、その目的とするところは、応力の集中しない平滑な溶
接部を得るための研削方法及び装置の提案分生たる目的
とするものである。
The present invention is a technology created in view of the above-mentioned problems, and its purpose is to propose a grinding method and device for obtaining a smooth welded part without concentration of stress. .

本発明はまた、上記溶接部の研削の時間′f:短縮する
ことができる有効な方法ご提案することである。
The present invention also proposes an effective method capable of shortening the grinding time 'f of the welded portion.

本発明は、さらにレーザー溶接の場合溶接部が非常に小
さく、従って研削位置の制御が困難であるという特許の
問題点を克服することを目的とするものである。
The invention further aims to overcome the problem of the patent that in the case of laser welding the weld is very small and therefore it is difficult to control the grinding position.

(問題点を解決するための手段) 本発明は、レーザー溶接により接続された特殊鋼鋼帯の
溶接部を、まずf′i径の大きな砥石にて研削し、次い
で粒径の小さな砥石にて研削下ることを骨子とする技術
である。
(Means for Solving the Problems) The present invention first grinds the welded portion of special steel strips connected by laser welding using a grindstone with a large f'i diameter, and then uses a grindstone with a small grain size. This is a technology that is based on grinding.

すなわち、上述した問題点に対し本発明は、高炭素Aや
高けい弄鋼等の特殊鋼鋼帯な、連kn処理ライン通板中
にレーザービームを用いて突き合わせ溶接を行い、引き
続いてその溶接部を手入れのために研削する方法におい
て、まず研削の初めに粗砥石による研削を行い、次いで
仕上砥石による研削を行うことご特徴とする特殊鋼鋼帯
のレーザービームによる突合わせ溶接部の研削方法をそ
の解決手段として提案する。
That is, in order to solve the above-mentioned problems, the present invention performs butt welding using a laser beam while passing special steel strips such as high-carbon A and high-strength steel through continuous processing lines, and subsequently welds the strips. A method of grinding a butt welded part of a special steel strip using a laser beam for cleaning, the method is characterized by first grinding with a rough whetstone and then grinding with a finishing whetstone. We propose this as a solution.

そして、上述の方法ご実施するために、第1図に示すよ
うな連続処理ライン通板中にレーザービームによる突合
わせ溶接なした特殊Di鋼帯の溶接部の研削装置におい
て、 上記調帯の一万の面に、溶接部の粗研削をする粗砥石お
よび仕上研削をする仕上砥石、これらの各砥石′f:回
転させる各回転駆動装置、各砥石?回転駆動装置ととも
に昇降させる昇降装置、およびこれらの各装置ご溶警部
に沿って横行移動させるための横行機構2配置し、 また鋼帯の他方の面には、鋼帯溶接部を押える回転自在
の押えロールおよびその押えロールを昇降させる押えロ
ール用昇降装置と、仕上研削を行うだめの仕上砥石およ
びこれご回転駆動させる回転駆動装置と、前記仕上砥石
を回転駆動装置とともに昇降させる昇降装置と、それら
の全体を一体としてこれを溶接部に沿って横行移動させ
るための横行装置とを配置し、 かつ、一方の面の粗砥石と他方の面の押えロール、また
一方の面の仕上砥石と他方の面の仕上砥石を、それぞれ
鋼帯の溶接Rをはさんで対称に配設したことを特徴とす
る特殊!v嗣帯のレーザービームによる突合わせ溶接部
研削用研削装置を提案する。
In order to carry out the above-mentioned method, in a grinding device for the welded part of a special Di steel strip that has been butt-welded with a laser beam during passing through a continuous processing line as shown in Fig. A rough grindstone for rough grinding of the welded part and a finishing grindstone for finish grinding, each of these grindstones'f: each rotary drive device to rotate, each grindstone? A lifting device that moves up and down along with a rotary drive device, and a traversing mechanism 2 that moves each of these devices traversely along the welding section are arranged, and on the other side of the steel strip there is a rotatable device that presses the welded part of the steel strip. A presser roll and a lifting device for the presser roll that raises and lowers the presser roll, a finishing grindstone for finishing grinding and a rotation drive device that rotates it, a lifting device that lifts and lowers the finishing grindstone together with the rotation drive device, and the like. A traversing device is arranged to move the whole as a whole along the welding part, and a rough grinding wheel on one side and a presser roll on the other side, and a finishing whetstone on one side and a traversing device on the other side are arranged. A special feature in which the surface finishing whetstones are arranged symmetrically across the weld radius of the steel strip! We propose a grinding device for grinding butt welds using a laser beam for V-sushi belts.

(作用) 第2図は、砥石粒度と研削面粒度との関係を示すもので
ある。この図より、砥石粒度が小さくなるに従い、研削
面粗度Rmax’μ)も小さくなることがわかる。
(Function) FIG. 2 shows the relationship between the grinding wheel grain size and the grinding surface grain size. From this figure, it can be seen that as the grindstone grain size becomes smaller, the ground surface roughness Rmax'μ) also becomes smaller.

また第3図は、絣削面粗度と反復曲げ回数との関係を示
すものであり、はぼ曲げ回数と研削面粗度とは反比例の
関係にあることかわかる。通常、この反復曲げ回数とし
ては、10回前後の繰返し曲げに耐えられれば各種ライ
ン?通板中に破断しないと解されており、このことによ
り表面粗度はRmax:10μ以下でなければならない
。さらに第4図に示すように、研削面粗度が1o±2.
5A′f、t!8えるとタンデム圧延中の板破断率は急
増する。
Further, FIG. 3 shows the relationship between the roughness of the cut surface and the number of repeated bending, and it can be seen that the number of times of bending and the roughness of the cut surface are inversely proportional. Normally, if the number of repeated bending is around 10 times, then various lines can withstand this repeated bending. It is understood that it will not break during sheet passing, and for this reason, the surface roughness must be Rmax: 10μ or less. Furthermore, as shown in FIG. 4, the roughness of the ground surface is 1o±2.
5A'f,t! 8, the plate breakage rate during tandem rolling increases rapidly.

従ってこの意味からも、表面粗度としてはRlnax;
lOμ以下であることが望ましいことがゎがる。
Therefore, from this point of view, the surface roughness is Rlnax;
It is desirable that it be less than lOμ.

第5図(ゴ、砥石粒度Cメツシュ)と研削量(耶)につ
いてのデータをまとめたグラフである。このグラフは、
研削速度を2 m/ minに固定した時の砥石の各粒
度(#46 、#120 、#1801について、研削
焼けが発生しないための研削量を示したものであり、砥
石粒度が大きいほど研削焼けの発生しない限界研削量は
多くなることがわかる。
FIG. 5 is a graph summarizing data regarding grinding wheel particle size C mesh and grinding amount (Y). This graph is
This shows the amount of grinding required to prevent grinding burn for each grinding wheel grain size (#46, #120, #1801) when the grinding speed is fixed at 2 m/min. It can be seen that the limit amount of grinding without occurrence of is large.

以上、説明したように曲げ或いは圧延等のDロ工?加え
ても板が破断しないためには、研削面粗度’ Rmax
 ’ 10μ以下である必要があり、そのためには少く
とも砥石の粒度として#18oより細かいものを必要と
することがわかる。一方研削量については、粒度#18
oと#46とで比較すると、前者は後者の約178.5
 Lか研削できない。これ以上研削量を多くすると、研
削時の発熱により熱変形、研削焼けが生じ、溶接強度の
低下を招くことになる。このような研削時間は、既設の
処理ラインにおいては致命的である。それは溶接時間と
かかる研削時間の和によるライン停止時間が非常に長い
ものとなり、ルーパー等の既設鋼帯貯蔵゛設備では吸収
できなくなることが起こるからである。この場合には、
該処理ラインの処理セクションをも停止せざるを得なく
なり、大きな損害を招くことになる。また、特殊鋼用と
して新ラインご建設する場合においても、ルーバー等の
設備が長大なものとなり好ましくない。
As explained above, is there a D-roll process such as bending or rolling? In order for the plate not to break even if the grinding surface is
It is clear that the grinding wheel needs to be 10μ or less, and for that purpose, the grain size of the grindstone must be at least finer than #18o. On the other hand, regarding the amount of grinding, the grain size is #18
Comparing o and #46, the former is about 178.5
I can't grind L. If the amount of grinding is increased more than this, the heat generated during grinding will cause thermal deformation and grinding burn, leading to a decrease in welding strength. Such grinding time is fatal in existing processing lines. This is because the line stoppage time due to the sum of the welding time and the grinding time becomes extremely long, which cannot be absorbed by existing steel strip storage equipment such as a looper. In this case,
The processing section of the processing line would also have to be stopped, resulting in significant damage. Furthermore, when constructing a new line for special steel, equipment such as louvers becomes long, which is not desirable.

そこで上述のような研削面粗度と研削時間というジ゛レ
ンマ2克服するために本発明では粗砥石と仕上砥石によ
る2段研削を採用したのである。
Therefore, in order to overcome Dilemma 2 of grinding surface roughness and grinding time as described above, the present invention employs two-stage grinding using a rough grindstone and a finishing grindstone.

第6交は、研削面粗度が20μと4μの場合における本
発明による研削結果を従来技術(1段研削)との比較で
示した。研削面粗度2oμの場合には、従来例では 4
6の砥石による1段研削、本発明では#46と4120
の砥石による2段研削である。また、4μの場合には、
従来例では#220、本発明例では#46と#220の
砥石号使用した。この図かられかるように、表面粗度の
大きい20μの場合には、研削時間は約ハの短縮にとど
まるが、表面粗度の小さい4μの場合には、電に短縮で
きる。
The sixth cross shows the results of grinding according to the present invention when the roughness of the ground surface is 20μ and 4μ in comparison with the conventional technique (single-stage grinding). In the case of a grinding surface roughness of 2oμ, the conventional example is 4
One-stage grinding using No. 6 grindstone, in this invention #46 and #4120
This is a two-stage grinding process using a grindstone. Also, in the case of 4μ,
In the conventional example, grindstone numbers #220 were used, and in the examples of the present invention, grindstone numbers #46 and #220 were used. As can be seen from this figure, in the case of a large surface roughness of 20μ, the grinding time can only be shortened by about 1, but in the case of a small surface roughness of 4μ, the grinding time can be shortened to about 100m.

丁なわち本発明は、ωを剛固をより平滑にすればするほ
ど、研削時間の短縮に大きな威力を発わiするのである
In other words, the more rigid and smooth the ω is, the more effective the present invention is in reducing the grinding time.

(実施例) 次に本発明の好適実施態様を第1図に基いて説明する。(Example) Next, a preferred embodiment of the present invention will be explained based on FIG.

Sfは先行ストリップ、Sbは後行ストリップであり、
Wはレーザー溶接部の溶接線ご示す。
Sf is a leading strip, Sb is a trailing strip,
W indicates the welding line of the laser welded part.

iずla 〜10aは粗砥石、2aはklI受、3aは
回転軸である。4a、6aはスプロケット、5aはチェ
ーンであり、7aは粗砥石駆動用モーターである。粗砥
石1aは、駆動用モーター7aによりスプロケット6a
1チエーン5a1スプロケツ)4aおよび回転軸8aを
介して回転駆動される。
10a is a rough grindstone, 2a is a klI holder, and 3a is a rotating shaft. 4a and 6a are sprockets, 5a is a chain, and 7a is a rough grindstone driving motor. The coarse grindstone 1a is driven by a sprocket 6a by a driving motor 7a.
1 chain 5a1 sprocket) 4a and rotation shaft 8a.

これらの粗砥石駆動装置一式はベース8aにブラケット
、ボルトその他も二より固定されて、こノヘース8と一
体になって昇降するように構成されている。9 a 、
 9 a’は横行台車11に取付けられたガイドレール
、1(laは同じく横行台車11に取付けられた粗砥石
用昇降モーターであり、前記ベース8aおよびこれと一
体となっている粗砥石駆動装置をガイドレール9 a 
、 9 a’に沿って昇降させるものである。
A set of these coarse grinding wheel drive devices is configured such that brackets, bolts, and other parts are fixed to the base 8a with two screws, so that they move up and down together with the grindstone head 8. 9 a,
9 a' is a guide rail attached to the traversing cart 11; 1 (la is a rough grinding wheel lifting motor also attached to the traversing cart 11; the base 8a and the rough grinding wheel driving device integrated therewith); Guide rail 9a
, 9 a'.

一万1b−10bは仕上研削用の装置であり、構造上は
上記粗研削装置と同じ構成よりなる。図中の12は、横
行用レール、13は横行台車11と一体になって取り付
けられた送りこま、14はねじP形成した送りシャフト
である。図示しない横行用モーターにより横行台ill
は、送りシャフト14およびこれに噛み合う送りコマ1
3を介して、鋼帯の幅方向に移動可能となっている。な
お、15はガイドロールである。
11b to 10b are devices for finish grinding, which have the same structure as the rough grinding device described above. In the figure, 12 is a rail for traversing, 13 is a feed top integrally attached to the traverse truck 11, and 14 is a feed shaft formed with threads P. A traversing motor (not shown) moves the traversing platform ill.
is the feed shaft 14 and the feed piece 1 that meshes with it.
3, it is movable in the width direction of the steel strip. Note that 15 is a guide roll.

上述の説明は、ス) IJツブの上側に位置する研削装
置について述べたが、対称位置にあるストリップ下側の
研削装置についてもほぼ同様の構造であるが、ただ違う
ところは、上側の粗砥石1aに対応するものが、下部側
では粗砥石は取付けられておらず、ノンドライブの押え
ロール16が回転自在に取付けられている点で異なる(
第7図(al参照)0すなわち上面側研削装置について
は、粗研削と仕上研削の両方が可能であるが、下面側研
削装置については仕上研削のみが可能となるように構成
されているものである。
The above explanation was about the grinding device located above the IJ knob, but the structure of the grinding device below the strip located in a symmetrical position is almost the same, but the only difference is that the grinding device located above the IJ knob The one corresponding to 1a is different in that the rough grindstone is not attached to the lower side, and a non-drive presser roll 16 is rotatably attached (
Fig. 7 (see al) 0, that is, the upper side grinding device is capable of both rough grinding and finish grinding, but the lower side grinding device is configured so that only finish grinding is possible. be.

次に、本発明の研削方法につき第6〜8図に基づいて説
明する。一般にレーザー溶接部の形状は、第8図(at
に示すような同一板厚の場合と、第8図(blに示すよ
うな板厚違・いの場合とがある。
Next, the grinding method of the present invention will be explained based on FIGS. 6 to 8. In general, the shape of the laser welded part is shown in Figure 8 (at
There are cases where the plate thickness is the same as shown in Fig. 8, and cases where the plate thickness is different as shown in Fig. 8 (bl).

通常、溶接のための調帯の突き合わせは、下面を基準に
して行うので、板厚違いの場合には(blのように上面
側に板厚差による段差ができる。
Normally, welding bands are matched based on the bottom surface, so if the plates have different thicknesses, there will be a step on the top side (as shown in BL) due to the difference in plate thickness.

このような溶接部形状を有する調帯S、r 、 Sbは
、第1図に示す研削装置内の所定位置に導き、位置決め
をして停止させた後クランプ17.18により固定する
。そこで例えば、溶だ部形状が第8図(b)の場合には
、粗砥5I a%仕上砥石1b。
The belts S, r, and Sb having such a welded shape are guided to a predetermined position in the grinding apparatus shown in FIG. 1, and after being positioned and stopped, they are fixed by clamps 17 and 18. Therefore, for example, if the shape of the melted part is as shown in FIG. 8(b), the rough grinding wheel 5I a% finishing grindstone 1b is used.

ldおよび押えo−ル1flpべ−7,8a〜8df介
し昇降モーター10a〜10dにより溶接部Wに押え付
ける。次いで各砥石1a、lb、ldを駆動用モーター
クa、7b、7dにより、スプロケット、チェーンを介
して回転させ、横行台車11 、11’をナツト13.
13’および送りシャツ)14.14’を介して図示し
ない駆動装置にて駆動させることで、各砥石を鋼帯幅方
向3指向する溶接線Wに沿って移動させ、研削する。こ
の場合の移動方向は、まず粗砥石1a、その後に仕上砥
石1bにて研削されるような方向とする。このようにし
て研削が終了すれば各機器2待機位置に戻す。
It is pressed against the welding part W by lifting motors 10a to 10d via ld and presser foot 1flp bases 7, 8a to 8df. Next, each grinding wheel 1a, lb, ld is rotated by a drive motor a, 7b, 7d via a sprocket and a chain, and the transverse carts 11, 11' are rotated by a nut 13.
13' and feed shirt) 14 and 14' by a drive device (not shown), each grindstone is moved along the weld line W oriented in the width direction 3 of the steel strip, and is ground. In this case, the direction of movement is such that first the rough grindstone 1a is used and then the finishing grindstone 1b is used for grinding. When the grinding is completed in this manner, each device 2 is returned to its standby position.

また、溶接部形状が第8図[alのようなものであれば
、調帯の上面側の研削量も少なくて済み、従って仕上砥
石1 b 、 ]、 dにより仕上研削のみP実施すれ
ば充分である。
In addition, if the welded part shape is as shown in Figure 8 [al], the amount of grinding on the upper surface side of the adjustment belt will be small, so it is sufficient to perform only the finish grinding P using the finishing wheels 1 b, ] and d. It is.

なお鋼板の形状は必ずしも平坦率の良好なものばかりと
は限らず、形状の良くないものがある。
Note that the shapes of steel plates do not necessarily have good flatness, and some have poor shapes.

特に巾方向の形状は圧延技術の進歩により良くなってい
るが長手方間においては、コイルの巻きぐせもありあま
り良くない。従って、本発明を適用するようなレーザー
溶接部の場合、溶接部が非常に小さい(1間前後)ため
、第9尚び)ようなケースでは溶接部を適当に研削でき
ないことがある。
In particular, the shape in the width direction has improved due to advances in rolling technology, but the shape in the longitudinal direction is not so good due to the uneven winding of the coil. Therefore, in the case of a laser welded part to which the present invention is applied, the welded part is very small (about 1 inch), so in cases such as No. 9 and above, it may not be possible to properly grind the welded part.

しかし、第1 u図に示すように砥石の径を小さくすれ
ば、鋼帯の形状が悪くとも研削可能となる。
However, if the diameter of the grindstone is made small as shown in Figure 1U, it becomes possible to grind even if the shape of the steel strip is poor.

そこで本発明は、研削量が大きい粗研削の場合径の大き
な砥石ご使用し、仕上研削には径の小さな砥石ご用いる
こととしたのである。さらに、溶接部と仕上砥石は線接
触に近い状態と考えられるので、第11図に示すように
、溶接線に対して仕上砥石ご傾けることがより好ましい
実施態様である。これにより、砥石と鋼帯との接触面f
flをはるかに大きくすることができ、未研削部分が残
るという幣害?肋単に解消することかできる。
Therefore, in the present invention, a large-diameter grindstone is used for rough grinding, which involves a large amount of grinding, and a small-diameter grindstone is used for finish grinding. Furthermore, since the welded portion and the finishing whetstone are considered to be in a state close to line contact, it is a more preferable embodiment to tilt the finishing whetstone with respect to the weld line, as shown in FIG. 11. As a result, the contact surface f between the grinding wheel and the steel strip
Is it possible to make fl much larger and there is a problem with unground parts remaining? It can be easily resolved.

他の実施態様として本発明では、研削が困難な場合があ
れば、まず粗砥石のみにて一段目の研削ご行い、次に第
2段階として仕上砥石のみによる・研削を行ってもよく
、この場合第7図(blにて示すように仕上砥石1bの
近傍を補助クランプ19にてクランプするとよいことが
確められた。
As another embodiment of the present invention, if there are cases where grinding is difficult, the first stage of grinding may be performed using only a coarse grindstone, and then the second stage of grinding may be performed using only a finishing grindstone. In this case, it has been confirmed that it is better to clamp the vicinity of the finishing whetstone 1b with the auxiliary clamp 19 as shown in FIG. 7 (bl).

溶接施工例 板部1025謳で板厚3.9龍と3.Ovrlの高けい
禦64鋼板をレーザービームによる突合わせ溶接を行い
、その後、まず粗砥石(”4B、径φ255mm lに
て研削し、次いで仕上砥石f #18’0.径100翼
翼)を用いて研削した。この時の仕上研削量はQ、l 
my<、粗研削f#、Q、9mm、また研削速度1.0
m / minであった。その後酸洗し、さらにタンデ
ム冷間圧延を行ったが、板の破断は全く発生しなかった
Welding construction example plate part 1025 plate thickness 3.9 dragon and 3. Ovrl's high-quality 64 steel plates were butt welded using a laser beam, and then ground using a coarse grindstone (4B, diameter φ255 mm l, and then finished using a finishing whetstone f #18'0.diameter 100 blade). The final grinding amount at this time was Q, l.
my<, rough grinding f#, Q, 9mm, and grinding speed 1.0
m/min. Afterwards, the plate was pickled and further subjected to tandem cold rolling, but no breakage occurred in the plate.

これに対し、仕上砥石(”180、径255門φ)だけ
ご用いて、上記と同様の条件で研削したところ(研削量
1.Qmml、研削焼けが発生し、酸洗ライン通板中板
破断2起した。
On the other hand, when grinding was performed using only a finishing whetstone ("180, diameter 255 gates φ) under the same conditions as above (grinding amount 1.Q mml, grinding burn occurred, and the plate broke during pickling line passing. 2 I woke up.

また上記と同じ材料ご用いて、研削焼け2起こさずに研
削面粗度がlOμになるように研削したところ、本発明
である2段研削の場合には、研削時間は62秒、従来方
法の1段研削の場合には91秒であった◎ C発明の効果) 以上説明したように本発明によれば、診゛d帯の各種連
続処理ラインにおいて、レーザー溶接を行いかつ溶接部
ご粗砥石と仕上砥石とを用いて研削することにより、前
記ラインの入側停止時間が短縮され、普通Mと同様にラ
インの処理セクションへの連続供給が可能となり、かつ
板破断することなく、圧延、曲げなどの加工ができるよ
うになり、高付加価値を有する特殊鋼の生産性向上、歩
留り同上などに効果がある。
In addition, using the same material as above, grinding was performed so that the roughness of the ground surface was lOμ without causing grinding burn 2. In the case of the two-stage grinding of the present invention, the grinding time was 62 seconds, compared to the conventional method. In the case of one-stage grinding, the time was 91 seconds ◎ Effect of invention C) As explained above, according to the present invention, laser welding is performed in various continuous processing lines in the diagnostic zone, and the welded part is coarsened by a grinding wheel. By grinding using a grinding wheel and a finishing whetstone, the stop time at the input side of the line is shortened, and continuous supply to the processing section of the line is possible in the same way as with normal M. This has the effect of improving the productivity of high-value-added special steel and improving yields.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は、本発明で用いる研削装置の斜視図、第2図は
、砥石粒度と研削面粗度との関係を示すグラフ、 第3図は、研削面粗度と反復曲げ回数との関係を示すグ
ラフ・ 第4図は、ω1削面粗度と圧延時の破断率との関係な示
すグラフ、 第5図は、研削焼けが発生しない砥石粒度と研Inとの
関係を示すグラフ、 第6図は、研削面粗度と研削時間(1段研削と第9図お
よび第10図は、いずれも鋼帯形状と砥石径との関係な
示す図、 第11図は、他の実!態様な示す仕上砥石の研削状況を
示す溶接鋼帯裏面の斜視図である。 1・・・砥石       2・・・軸受3・・・回転
軸      4・・・スプロケット5・・・チェーン
      6・・・スプロケット7・・−砥石駆動用
モーター 8・・・ベース      9・・・ガイドレール10
・・・昇降モーター   11・・・横行台車12・・
・横行用レール   13・・・送りこま14・・・送
りシャフト   15・・・ガイドロール16・・・押
えロール    17.18・・・クランプ19・・・
補助クランプ。 第1図。 第2図     @3図 つ 第4図 5±2.5 10=2,5 1512.5才反面阻序(
〜aχPり 第5図 石6石米立1度 2θP     4/J 、H剤m97M、(Rmax) 第7図 第8図 コ[
Fig. 1 is a perspective view of the grinding device used in the present invention, Fig. 2 is a graph showing the relationship between grinding wheel grain size and grinding surface roughness, and Fig. 3 is a graph showing the relationship between grinding surface roughness and the number of repeated bending. Figure 4 is a graph showing the relationship between ω1 ground surface roughness and fracture rate during rolling. Figure 5 is a graph showing the relationship between grinding wheel grain size and grinding In which does not cause grinding burn. The figure shows the relationship between the grinding surface roughness and the grinding time (one-stage grinding, Figures 9 and 10 both show the relationship between the steel strip shape and the grinding wheel diameter, and Figure 11 shows the relationship between the steel strip shape and the grinding wheel diameter. It is a perspective view of the back side of the welded steel strip showing the grinding situation of the finishing whetstone shown in FIG. ...-Grinding wheel drive motor 8...Base 9...Guide rail 10
... Lifting motor 11 ... Traverse trolley 12 ...
・Traversing rail 13... Feed top 14... Feed shaft 15... Guide roll 16... Presser roll 17.18... Clamp 19...
Auxiliary clamp. Figure 1. Figure 2 @ Figure 3 Figure 4 5 ± 2.5 10 = 2,5 1512.5 years old
~aχP Figure 5 stone 6 stones 1 degree 2θP 4/J, H agent m97M, (Rmax) Figure 7 Figure 8 [

Claims (1)

【特許請求の範囲】 1、高炭素鋼や高けい素鋼等の特殊鋼鋼帯を、連続処理
ライン通板中にレーザービームを用いて突き合わせ溶接
を行い、引き続いてその溶接部を手入れのために研削す
る方法において、まず研削の初めに粗砥石による研削を
行い、次いで仕上砥石による研削を行うことを特徴とす
る特殊鋼鋼帯のレーザービームによる突合わせ溶接部の
研削方法。 2、上記砥石につき、粗砥石の粒度を^♯120以下と
し、仕上砥石の粒度を^♯180以上のものを用いるこ
とを特徴とする特許請求の範囲第1項記載の研削方法。 3、連続処理ライン通板中にレーザービームによる突合
わせ溶接をした特殊鋼鋼帯の溶接部の研削装置において
、 上記鋼帯の一方の面に、溶接部の粗研削を する粗砥石および仕上研削をする仕上砥石、これらの各
砥石を回転させる各回転駆動装置、各砥石を回転駆動装
置とともに昇降させる昇降装置、およびこれらの各装置
を溶接部に沿つて横行移動させるための横行機構を配置
し、また鋼帯の他方の面には、鋼帯溶接部を押 える回転自在の押えロールおよびその押えロールを昇降
させる押えロール用昇降装置と、仕上研削を行うための
仕上砥石およびこれを回転駆動させる回転駆動装置と、
前記仕上砥石を回転駆動装置とともに昇降させる昇降装
置と、それらの全体を一体としてこれを溶接部に沿つて
横行移動させるための横行機構とを配置し、 かつ、一方の面の粗砥石と他方の面の押え ロール、また一方の面の仕上砥石と他方の面の仕上砥石
を、それぞれ鋼帯の溶接部をはさんで対称に配設したこ
とを特徴とする特殊鋼鋼帯のレーザービームによる突合
わせ溶接部研削用研削装置。 4、上記粗砥石の径が仕上砥石の径より大なることを特
徴とする特許請求の範囲第3項記載の研削装置。 5、上記仕上砥石の回転軸が、鋼帯の溶接線に対して水
平面で交差するようにて配設することを特徴とする特許
請求の範囲第4項記載の研削装置。
[Claims] 1. Butt welding of special steel strips such as high carbon steel or high silicon steel using a laser beam while passing through a continuous processing line, and subsequently cleaning the welded parts. A method for grinding a butt weld of a special steel strip using a laser beam, the method comprising: first grinding using a rough grindstone, and then grinding using a finishing grindstone. 2. The grinding method according to claim 1, characterized in that the coarse grindstone has a grain size of ^#120 or less, and the finishing whetstone has a grain size of ^#180 or more. 3. In a machine for grinding the welds of special steel strips butt-welded with a laser beam during continuous processing line threading, a rough grinding wheel for rough grinding the welds and a finish grinder are placed on one side of the steel strip. A finishing whetstone is arranged to perform the finishing process, a rotation drive device that rotates each of these grindstones, a lifting device that raises and lowers each grindstone together with the rotation drive device, and a traverse mechanism that moves each of these devices laterally along the welding part. Also, on the other side of the steel strip, there is a rotatable presser roll that presses down the welded part of the steel strip, a lifter for the presser roll that raises and lowers the presser roll, and a finishing whetstone for finishing grinding and a rotating drive to drive the presser roll. a rotary drive device;
A lifting device for raising and lowering the finishing whetstone along with a rotary drive device, and a traversing mechanism for moving the whole of them laterally along the welded part as one body are arranged, and the roughing whetstone on one side and the rough whetstone on the other side are arranged. Laser beam probing of special steel strips is characterized in that a pressure roll on one surface, a finishing whetstone on one surface, and a finishing whetstone on the other surface are arranged symmetrically across the welded part of the steel strip. Grinding device for grinding joint welds. 4. The grinding device according to claim 3, wherein the diameter of the rough grindstone is larger than the diameter of the finishing grindstone. 5. The grinding device according to claim 4, wherein the rotating shaft of the finishing grindstone is disposed so as to intersect the weld line of the steel strip in a horizontal plane.
JP59179318A 1984-08-30 1984-08-30 Grinding method of butt welding part by means of laser beam for special steel trip and device thereof Pending JPS6161756A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59179318A JPS6161756A (en) 1984-08-30 1984-08-30 Grinding method of butt welding part by means of laser beam for special steel trip and device thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59179318A JPS6161756A (en) 1984-08-30 1984-08-30 Grinding method of butt welding part by means of laser beam for special steel trip and device thereof

Publications (1)

Publication Number Publication Date
JPS6161756A true JPS6161756A (en) 1986-03-29

Family

ID=16063735

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59179318A Pending JPS6161756A (en) 1984-08-30 1984-08-30 Grinding method of butt welding part by means of laser beam for special steel trip and device thereof

Country Status (1)

Country Link
JP (1) JPS6161756A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100742901B1 (en) * 2001-04-19 2007-07-25 주식회사 포스코 Apparatus for grinding plating layer on welding portion of plated strip for welding the plated strips
CN114310548A (en) * 2021-12-10 2022-04-12 中交二公局第六工程有限公司 Pipe gallery terminal surface grinding device and pipe gallery construction system thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS518695A (en) * 1974-07-12 1976-01-23 Takashi Takeuchi Kinzokutateguno yosetsubujidokenmasochi
JPS5191091A (en) * 1975-02-07 1976-08-10

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS518695A (en) * 1974-07-12 1976-01-23 Takashi Takeuchi Kinzokutateguno yosetsubujidokenmasochi
JPS5191091A (en) * 1975-02-07 1976-08-10

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100742901B1 (en) * 2001-04-19 2007-07-25 주식회사 포스코 Apparatus for grinding plating layer on welding portion of plated strip for welding the plated strips
CN114310548A (en) * 2021-12-10 2022-04-12 中交二公局第六工程有限公司 Pipe gallery terminal surface grinding device and pipe gallery construction system thereof
CN114310548B (en) * 2021-12-10 2023-02-03 中交二公局第六工程有限公司 Pipe gallery terminal surface grinding device and pipe gallery construction system thereof

Similar Documents

Publication Publication Date Title
DE10036711B4 (en) Device and method for connecting metal strip ends
US2807123A (en) Grinding machines and the like
US6237205B1 (en) Reversing cold rolling apparatus
CN101804596B (en) Welding groove sander
JP6445894B2 (en) Double-head surface grinding grinding wheel and double-head surface grinding method
JPS6161756A (en) Grinding method of butt welding part by means of laser beam for special steel trip and device thereof
US5193317A (en) Method for grinding metal and metal-alloy stock
JPS58109262A (en) Polisher
KR100761739B1 (en) Grinder in welder
JPH0531663A (en) Treating method for belt-like metallic substance
JP3847168B2 (en) Finishing method for welded zone of strip metal sheet
JPH11285829A (en) Welding method and welding equipment
JP3035109B2 (en) Foreign material removal device for strip welding
US3040608A (en) Reciprocating surface-finishing mechanism and method
JP2905022B2 (en) Splicing of steel strip in continuous annealing line
JPS61108408A (en) Joining device of hot rolling stock
JPS61182876A (en) Welding equipment having grinding equipment
JP2001047353A (en) Grinding method and device for slab, and fms equipped with the grinding device
US676695A (en) Machine for preparing rails for rerolling.
JP3090496B2 (en) Method and apparatus for joining hot rolled material and continuous hot rolling equipment
JPH1058006A (en) Method for hot joining steel
JPH01177956A (en) Groove processing method to hard material
JPS63180457A (en) Welding burr removing device
JPH10118773A (en) Equipment and method for joining metallic strip
KR20020081748A (en) Apparatus for grinding plating layer on welding portion of plated strip for welding the plated strips