JPH0775791B2 - Welding positioner - Google Patents
Welding positionerInfo
- Publication number
- JPH0775791B2 JPH0775791B2 JP36007591A JP36007591A JPH0775791B2 JP H0775791 B2 JPH0775791 B2 JP H0775791B2 JP 36007591 A JP36007591 A JP 36007591A JP 36007591 A JP36007591 A JP 36007591A JP H0775791 B2 JPH0775791 B2 JP H0775791B2
- Authority
- JP
- Japan
- Prior art keywords
- work
- mounting table
- hydraulic cylinder
- work mounting
- welding
- 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
- Butt Welding And Welding Of Specific Article (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、橋梁や建築用の鉄骨
とこれに溶接される仕口等の部材とからなるワークを、
水平位置から垂直位置に回転して保持するとともに、ワ
ークを軸方向に回転できるようにした溶接用ポジショナ
ーに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work made up of steel frames for bridges and constructions and members such as joints welded thereto.
The present invention relates to a welding positioner capable of rotating and holding a work from an horizontal position to a vertical position and rotating the work in an axial direction.
【０００２】[0002]
【従来の技術】従来の溶接用ポジショナーとしては、鉄
骨を水平状態で治具に取り付け、一部分の溶接が終わっ
たら水平のままで軸方向に回転させて次の溶接を行なう
ようにするものが一般的である。2. Description of the Related Art A conventional welding positioner is generally one in which a steel frame is attached to a jig in a horizontal state, and when a part of the welding is completed, the steel is horizontally rotated to perform the next welding. Target.
【０００３】[0003]
【発明が解決しようとする課題】鉄骨等の溶接作業にお
いては、下向き溶接を行なうことが必要なパス数が少な
くて済み、また溶接不良が起きにくい等の利点があって
好ましいものである。しかしながら、鉄骨を垂直に立て
ないかぎりこのような下向き溶接を行なうことができな
い箇所があり、上記従来例においては下向き溶接を行な
うことができなかった。In the welding work of steel frames or the like, downward welding is preferable because it requires a small number of passes and does not easily cause welding defects. However, there is a portion where such downward welding cannot be performed unless the steel frame is set upright, and the downward welding cannot be performed in the above conventional example.
【０００４】この発明は上記従来例の溶接用ポジショナ
ーの欠点を解消しようとするものであり、鉄骨等のワー
クを垂直に立てることができ、しかも垂直位置で軸方向
に回転することによって簡易迅速に下向き溶接を行なう
ことができるようにした溶接用ポジショナーを提供しよ
うとするものである。The present invention is intended to eliminate the drawbacks of the above-mentioned conventional welding positioner, in which a work such as a steel frame can be vertically erected, and moreover, by rotating in the axial direction at the vertical position, the work can be performed easily and quickly. An object of the present invention is to provide a welding positioner capable of performing downward welding.
【０００５】[0005]
【課題を解決するための手段】すなわちこの発明の溶接
用ポジショナーは、背面に回転軸が取り付けられ、この
回転軸で水平位置および垂直位置に回転可能に保持され
たワーク搭載台と、ワーク搭載台の上記回転軸から所定
の間隔の背面の適所を突き上げて回転駆動させる第１の
油圧シリンダと、回転軸を挟んで第１の油圧シリンダの
反対側に取り付けた第２の油圧シリンダと、ワーク搭載
台の前面の一端に取り付けられ、ワークを軸方向に回転
可能に保持する回転台と、この回転台と所定の間隔で取
り付けられ、ワークを軸方向に回転可能に保持する回転
治具と、垂直位置に保持されたワーク搭載台と平行な、
ガイドレール上を昇降する作業台とを有することを特徴
とするものである。That is, a welding positioner of the present invention is provided with a rotating shaft attached to a back surface thereof, and a workpiece mounting table which is rotatably held by the rotating shaft in a horizontal position and a vertical position, and a workpiece mounting table. A first hydraulic cylinder that pushes up a proper position on the back surface of the rotary shaft at a predetermined distance from the rotary shaft to drive the rotation, a second hydraulic cylinder mounted on the opposite side of the first hydraulic cylinder across the rotary shaft, and a work mounting A rotary table that is attached to one end of the front of the table and holds the work rotatably in the axial direction; a rotary jig that is installed at a predetermined interval from the rotary table and holds the work rotatably in the axial direction; Parallel to the work mounting table held in the position,
It has a workbench that moves up and down on the guide rail.
【０００６】[0006]
【作用】この発明の溶接用ポジショナーによれば、鉄骨
等のワークを垂直に立てることができ、しかも垂直位置
で軸方向に回転することによって簡易迅速に下向き溶接
を行なうことができる。According to the welding positioner of the present invention, a work such as a steel frame can be erected vertically, and moreover, the downward welding can be performed simply and quickly by rotating the workpiece in the axial direction at the vertical position.
【０００７】またワーク搭載台の垂直位置に平行に昇降
する作業台を設けたので、ワークを昇降させる場合に生
じる装置の大型化、昇降に伴なう時間のロス等をなくし
て迅速な溶接作業を行なうことができるようになった。Further, since a workbench that moves up and down in parallel to the vertical position of the work mounting table is provided, a large-scale device for raising and lowering the work and a loss of time associated with the lifting and the like can be eliminated to perform a quick welding work. You can now do.
【０００８】[0008]
【実施例】以下この発明の溶接用ポジショナーの一実施
例を図面に基いて説明する。図１は基本的な機器の構成
を示すもので、１はほぼワーク３１と等しい長さで一端
に立上がり部３７を設けたワーク搭載台である。このワ
ーク搭載台１は、繊維強化コンクリート等の薄肉かつ軽
量でも強度のある素材で形成することが望ましい。ワー
ク搭載台１の背面には回転軸２が取り付けられ、この回
転軸２で、ワーク搭載台１はフロア５１上において水平
位置および垂直位置に回転可能に保持されている。３
は、ワーク搭載台１が水平位置になったときにフロア５
１に接するように、ワーク搭載台１の背面に取り付けら
れた支持脚である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the welding positioner of the present invention will be described below with reference to the drawings. FIG. 1 shows the configuration of a basic device. Reference numeral 1 is a work mounting table having a length substantially equal to that of the work 31 and a rising portion 37 provided at one end. It is desirable that the work mounting table 1 is made of a material such as fiber reinforced concrete that is thin and lightweight, yet has strength. A rotary shaft 2 is attached to the back surface of the work mounting base 1, and the work mounting base 1 is rotatably held on the floor 51 by the rotary shaft 2 in horizontal and vertical positions. Three
Is on the floor 5 when the work mounting table 1 is in the horizontal position.
1 is a supporting leg that is attached to the back surface of the work mounting table 1 so as to be in contact with 1.
【０００９】４は、フロア５１とワーク搭載台１の背面
との間に取り付けた第１の油圧シリンダで、ワーク搭載
台１の上記回転軸２から所定の間隔の背面の適所を突き
上げて、図１ないし図３のように回転駆動させるもので
ある。Reference numeral 4 denotes a first hydraulic cylinder mounted between the floor 51 and the back surface of the work mounting table 1 by pushing up a proper position on the back surface of the work mounting table 1 at a predetermined distance from the rotary shaft 2 and It is driven to rotate as shown in FIGS.
【００１０】５は、上記回転軸２を挟んで第１の油圧シ
リンダ４の反対側のワーク搭載台１に取り付けた第２の
油圧シリンダで、ワーク搭載台１が図２の位置になった
のちに重心が変わってそれ以上に回転しようとするのを
防いで支持するものである。また、ワーク搭載台１が図
３のように垂直位置にある場合、その重心が前面側に位
置していて多大の負荷がかかる。そのため、ワーク搭載
台１を垂直位置から水平位置に回転駆動させる際に生じ
る第１の油圧シリンダ４の牽引力の不足を、この第２の
油圧シリンダ５の押圧力で補うのである。Numeral 5 is a second hydraulic cylinder mounted on the work mounting base 1 on the opposite side of the first hydraulic cylinder 4 with the rotary shaft 2 sandwiched therebetween, after the work mounting base 1 is located at the position shown in FIG. It prevents the rotation of the center of gravity and changes the center of gravity, and supports it. Further, when the work mounting table 1 is in the vertical position as shown in FIG. 3, its center of gravity is located on the front surface side, and a great load is applied. Therefore, the deficiency of the traction force of the first hydraulic cylinder 4 that occurs when the work mounting table 1 is rotationally driven from the vertical position to the horizontal position is compensated by the pressing force of the second hydraulic cylinder 5.
【００１１】上記第１の油圧シリンダ４および第２の油
圧シリンダ５は、それぞれの受ける荷重ないし長さの変
化に応じて相対的に、互いの伸縮方向や加圧力を制御さ
れている。また第１の油圧シリンダ４および第２の油圧
シリンダ５は、いずれもワーク搭載台１やそれに搭載さ
れたワークによる負荷に応じて、使用する機種を選定す
ればよい。また、初期のサイズや伸長した際の長さもワ
ーク搭載台１のサイズに応じて決定すればよい。なおワ
ーク搭載台１の幅に応じて、第１の油圧シリンダ４およ
び第２の油圧シリンダ５を適当な数だけ並設することも
できる。The first hydraulic cylinder 4 and the second hydraulic cylinder 5 are controlled relative to each other in the expansion / contraction direction and the pressurizing force in accordance with the change in the load or length they receive. For the first hydraulic cylinder 4 and the second hydraulic cylinder 5, the models to be used may be selected according to the load of the work mounting base 1 and the work mounted thereon. Further, the initial size and the length when expanded may be determined according to the size of the work mounting table 1. Note that, depending on the width of the work mounting base 1, an appropriate number of the first hydraulic cylinders 4 and the second hydraulic cylinders 5 can be arranged in parallel.
【００１２】６はワーク搭載台１の前面の一端に取り付
けられ、ワーク３１を軸方向に回転可能に保持する回転
台である。７は、この回転台６と所定の間隔で取り付け
られ、ワーク３１を軸方向に回転可能に保持する回転治
具である。Reference numeral 6 denotes a rotary table which is attached to one end of the front surface of the work mounting table 1 and holds the work 31 rotatably in the axial direction. Reference numeral 7 is a rotary jig which is attached to the rotary table 6 at a predetermined interval and holds the work 31 rotatably in the axial direction.
【００１３】８はフロア５１と天井５２との間に張設し
たガイドレールで、垂直位置に保持されたワーク搭載台
１と平行に形成されており、このガイドレール上を作業
台９が昇降するようになっている。１１は作業台９を昇
降させるワイヤで、巻上げ機１２によって昇降操作する
ようになっている。Reference numeral 8 denotes a guide rail stretched between a floor 51 and a ceiling 52, which is formed in parallel with the work mounting base 1 held in a vertical position, on which the workbench 9 moves up and down. It is like this. Reference numeral 11 is a wire for raising and lowering the workbench 9, which can be raised and lowered by the hoist 12.
【００１４】１３はワーク３１を所定位置に搬送してワ
ーク搭載台１に取り付けるためのチェーンブロックで、
天井レール１４上を走行するようになっている。Reference numeral 13 is a chain block for transporting the work 31 to a predetermined position and mounting it on the work mount 1.
It runs on the ceiling rail 14.
【００１５】なおフロア５１の適所には、ワーク搭載台
１が垂直位置になったときにその下部を収納する凹所１
５が形成されている。１６はワーク搭載台１の回転台６
の裏面に取り付けたバランスウエイトである。A recess 1 for accommodating a lower portion of the work mounting table 1 when the work mounting table 1 is in a vertical position is provided at an appropriate position on the floor 51.
5 is formed. 16 is a rotary table 6 of the work mounting table 1
It is a balance weight attached to the back of the.
【００１６】図４および図５は作業台９の詳細を示すも
ので、基部２１をガイドレール８間にはさみ込まれてお
り、弾性車輪２２および２３で低騒音で走行するように
なっている。上記基部２１の両側にはそれぞれモータ２
４とベアリング２５を介して作業テーブル２６，２７が
回転自在に取り付けられている。２８は手すり、２９は
チェーン手すりである。4 and 5 show the details of the workbench 9. The base 21 is sandwiched between the guide rails 8 so that the elastic wheels 22 and 23 can travel with low noise. A motor 2 is provided on each side of the base 21.
Work tables 26 and 27 are rotatably attached via 4 and a bearing 25. 28 is a handrail and 29 is a chain handrail.
【００１７】図６および図７は回転台６の詳細を示し、
ワーク３１の周囲を規制する保持枠３２，３３と、保持
枠３２，３３にワーク３１を押し付けて固定するジャッ
キ３４とを備えている。そして回転台６は、ワーク搭載
台１端部の立上がり部３７にモータ３５とベアリング３
６を介して回転自在に取り付けられている。6 and 7 show the details of the turntable 6,
Holding frames 32 and 33 that regulate the periphery of the work 31 and a jack 34 that presses and fixes the work 31 on the holding frames 32 and 33 are provided. The rotary table 6 includes a motor 35 and a bearing 3 at the rising portion 37 at the end of the work mounting table 1.
It is rotatably attached via 6.
【００１８】図８は回転治具７の詳細を示すものであ
る。すなわち、円形の回転部３８に設けたコ字状の切込
み３９にワーク３１を収納し、その開口部を開閉部材４
１によって閉じた上、ジャッキ４２でワーク３１を固定
するようになっている。この回転部３７はコ字状の回転
枠４３内で複数のローラ４４によって回転自在に保持さ
れ、上記回転台６の駆動に連れて回転するようになって
いる。４５は回転枠４３に設けた車輪で、ワーク搭載台
１の前面にその長さ方向に沿って設けたレール４６に搭
載され、ワーク３１のサイズに応じて回転台６との間隔
を調節するために使用される。FIG. 8 shows the details of the rotating jig 7. That is, the work 31 is housed in the U-shaped cut 39 provided in the circular rotating portion 38, and the opening thereof is opened and closed by the opening / closing member 4.
The work 31 is fixed by the jack 42 after being closed by 1. The rotating portion 37 is rotatably held by a plurality of rollers 44 in a U-shaped rotating frame 43, and is rotated as the rotating table 6 is driven. Reference numeral 45 denotes a wheel provided on the rotary frame 43, which is mounted on a rail 46 provided along the length direction on the front surface of the work mounting table 1 for adjusting the distance between the rotary table 6 and the work table 31 according to the size of the work 31. Used for.
【００１９】この発明の溶接用ポジショナーの使用に際
しては、図１のようにワーク搭載台１の水平位置で回転
台６および回転治具７にチェーンブロック１３で搬送し
てきたワーク３１を取り付け、ジャッキ３４，４２類で
確実に固定する。次に第１の油圧シリンダ４を駆動し、
ワーク搭載台１を回転させる。ワーク搭載台１が図２の
位置に来たとき、丁度回転軸２上に重心が位置してい
る。その後第２の油圧シリンダ５でワーク搭載台１の重
みを支えながら回転を続け、ワーク搭載台１が図３の垂
直位置まで来たら回転を止める。When the welding positioner of the present invention is used, the work 31 conveyed by the chain block 13 is attached to the rotary table 6 and the rotary jig 7 at the horizontal position of the work mounting table 1 as shown in FIG. , Secure with 42 class. Next, drive the first hydraulic cylinder 4,
Rotate the work mount 1. When the work mounting base 1 reaches the position shown in FIG. 2, the center of gravity is located exactly on the rotary shaft 2. After that, the second hydraulic cylinder 5 continues the rotation while supporting the weight of the work mounting base 1, and stops the rotation when the work mounting base 1 reaches the vertical position in FIG.
【００２０】この垂直位置で作業台９を昇降させ、作業
テーブル２６，２７を所定位置まで回転させた上で溶接
作業を行なう。その際仕口等は下向きで迅速かつ確実に
溶接することができる。作業に際しては回転台６でワー
ク３１を軸方向に回転させたり、作業テーブル２６，２
７の位置を変えながら、適宜位置で作業を行なえばよ
い。The work table 9 is moved up and down at this vertical position, the work tables 26 and 27 are rotated to predetermined positions, and then the welding work is performed. At that time, the joint or the like faces downward so that welding can be performed quickly and reliably. At the time of work, the work 31 is rotated in the axial direction by the turntable 6 or the work tables 26, 2
Work may be performed at an appropriate position while changing the position of 7.
【００２１】作業が終わったら作業テーブル２６，２７
を元の位置に戻し、第２の油圧シリンダ５でワーク搭載
台１を押しながら回転を始動させ、第１の油圧シリンダ
４で支えながら水平位置まで戻す。そして回転台６およ
び回転治具７からワーク３１を取り外せば溶接作業が終
了する。When the work is completed, the work tables 26 and 27
Is returned to its original position, rotation is started while pushing the work mounting base 1 with the second hydraulic cylinder 5, and the work is returned to the horizontal position while being supported by the first hydraulic cylinder 4. Then, the work 31 is removed from the rotary table 6 and the rotary jig 7 to complete the welding operation.
【００２２】上記ワーク搭載台１の回転駆動、作業台９
の昇降、作業テーブル２６，２７の回転、回転台６の駆
動によるワーク３１の位置決め等は、所定の位置に設置
した手元スイッチ等で遠隔操作することができ、溶接作
業中に一々操作盤によって操作する面倒をなくすことが
できる。Rotation drive of the work mounting table 1 and work table 9
The lifting and lowering of the work table, the rotation of the work tables 26 and 27, the positioning of the work 31 by driving the rotary table 6, and the like can be remotely controlled by a hand switch or the like installed at a predetermined position. You can eliminate the hassle of doing it.
【００２３】[0023]
【発明の効果】この発明の溶接用ポジショナーによれ
ば、鉄骨等のワークを垂直に立てることができ、しかも
垂直位置で軸方向に回転することによって簡易迅速に下
向き溶接を行なうことができる。According to the welding positioner of the present invention, a workpiece such as a steel frame can be erected vertically, and moreover, the downward welding can be performed simply and quickly by rotating the workpiece in the vertical direction in the axial direction.
【００２４】またワーク搭載台の垂直位置に平行に昇降
する作業台を設けたので、ワークを昇降させる場合に生
じる装置の大型化、昇降に伴なう時間のロス等をなくし
て迅速な溶接作業を行なうことができるようになった。Further, since a workbench that moves up and down in parallel with the vertical position of the work mounting table is provided, a large welding apparatus, which is required when moving up and down the work, and a time loss associated with the lifting up and down, are eliminated, and a quick welding work is performed. You can now do.
【図１】この発明の溶接用ポジショナーの基本的な機器
の構成を示す概略図である。FIG. 1 is a schematic view showing a configuration of basic equipment of a welding positioner of the present invention.
【図２】ワーク搭載台１の駆動状態を示す概略図であ
る。FIG. 2 is a schematic diagram showing a driving state of the work mounting table 1.
【図３】ワーク搭載台１の垂直位置を示す概略図であ
る。FIG. 3 is a schematic view showing a vertical position of the work mounting table 1.
【図４】作業台の平面図である。FIG. 4 is a plan view of a workbench.
【図５】作業台の側面図である。FIG. 5 is a side view of a workbench.
【図６】回転台の側面図である。FIG. 6 is a side view of a turntable.
【図７】回転台の平面図である。FIG. 7 is a plan view of a turntable.
【図８】回転治具の平面図である。FIG. 8 is a plan view of a rotating jig.
１ ワーク搭載台 ２ 回転軸 ３ 支持脚 ４ 第１の油圧シリンダ ５ 第２の油圧シリンダ ６ 回転台 ７ 回転治具 ８ ガイドレール ９ 作業台 １１ ワイヤ １２ 巻上げ機 １３ チェーンブロック １４ 天井レール １５ 凹所 １６ バランスウエイト ２１ 基部 ２２，２３ 弾性車輪 ２４ モータ ２５ ベアリング ２６，２７ 作業テーブル ２８ 手すり ２９ チェーン手すり ３１ ワーク ３２，３３ 保持枠 ３４ ジャッキ ３５ モータ ３６ ベアリング ３７ 立上がり部 ３８ 回転部 ３９ 切込み ４１ 開閉部材 ４２ ジャッキ ４３ 回転枠 ４４ ローラ ４５ 車輪 ４６ レール ５１ フロア ５２ 天井 1 Work Loading Platform 2 Rotating Shaft 3 Support Leg 4 First Hydraulic Cylinder 5 Second Hydraulic Cylinder 6 Rotating Platform 7 Rotating Jig 8 Guide Rail 9 Working Platform 11 Wire 12 Winding Machine 13 Chain Block 14 Ceiling Rail 15 Recess 16 Balance weight 21 Base 22,23 Elastic wheel 24 Motor 25 Bearing 26,27 Work table 28 Handrail 29 Chain handrail 31 Work 32,33 Holding frame 34 Jack 35 Motor 36 Bearing 37 Standing part 38 Rotating part 39 Notch 41 Opening / closing member 42 Jack 43 Rotating frame 44 Roller 45 Wheel 46 Rail 51 Floor 52 Ceiling
Claims (1)
軸で水平位置および垂直位置に回転可能に保持されたワ
ーク搭載台と、ワーク搭載台の上記回転軸から所定の間
隔の背面の適所を突き上げて回転駆動させる第１の油圧
シリンダと、回転軸を挟んで第１の油圧シリンダの反対
側に取り付けた第２の油圧シリンダと、ワーク搭載台の
前面の一端に取り付けられ、ワークを軸方向に回転可能
に保持する回転台と、この回転台と所定の間隔で取り付
けられ、ワークを軸方向に回転可能に保持する回転治具
と、垂直位置に保持されたワーク搭載台と平行な、ガイ
ドレール上を昇降する作業台とを有することを特徴とす
る溶接用ポジショナー。1. A work mounting table having a rotary shaft attached to a back surface thereof, which is rotatably held by the rotary shaft in a horizontal position and a vertical position, and an appropriate position on the back surface of the work mounting table at a predetermined distance from the rotary shaft. A first hydraulic cylinder that pushes up and drives to rotate, a second hydraulic cylinder that is mounted on the opposite side of the first hydraulic cylinder across the rotary shaft, and that is mounted on one end of the front surface of the work mounting table to axially move the work. A rotatably held rotating table, a rotating jig that is attached to the rotatory at a predetermined interval and holds the work rotatably in the axial direction, and a guide that is parallel to the work mounting table held in the vertical position. A welding positioner having a workbench that moves up and down on a rail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36007591A JPH0775791B2 (en) | 1991-12-28 | 1991-12-28 | Welding positioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36007591A JPH0775791B2 (en) | 1991-12-28 | 1991-12-28 | Welding positioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05177391A JPH05177391A (en) | 1993-07-20 |
| JPH0775791B2 true JPH0775791B2 (en) | 1995-08-16 |
Family
ID=18467782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP36007591A Expired - Fee Related JPH0775791B2 (en) | 1991-12-28 | 1991-12-28 | Welding positioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0775791B2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8099184B2 (en) * | 2009-04-13 | 2012-01-17 | Rimrock Automation, Inc. | Load compensation for robotic applications |
| CN101898279A (en) * | 2010-07-30 | 2010-12-01 | 倪金土 | Automatic welding machine |
| CN103659069B (en) * | 2012-08-28 | 2016-04-13 | 安川首钢机器人有限公司 | Positioner and possess the robot system of positioner |
| CN103128479A (en) * | 2013-03-14 | 2013-06-05 | 辽宁省电力有限公司抚顺供电公司 | Skip car type distribution transform low-voltage welding table |
| CN104476091B (en) * | 2014-12-02 | 2016-08-17 | 贵州汇通申发钢结构有限公司 | A kind of welding system for large-scale wall thickness steel plate |
| US10845778B2 (en) | 2017-03-30 | 2020-11-24 | Lincoln Global, Inc. | Workpiece positioner and welding sequencer |
| KR101976005B1 (en) * | 2017-05-11 | 2019-05-07 | 주식회사 명진티에스알 | apparatus of overlay welding for vertical type |
| CN111066617A (en) * | 2019-12-27 | 2020-04-28 | 中国地质工程集团有限公司 | Automatic tree planter |
-
1991
- 1991-12-28 JP JP36007591A patent/JPH0775791B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05177391A (en) | 1993-07-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |