JPH03149164A - Appearance adjusting device for zinc-plated steel pipe - Google Patents
Appearance adjusting device for zinc-plated steel pipeInfo
- Publication number
- JPH03149164A JPH03149164A JP28171589A JP28171589A JPH03149164A JP H03149164 A JPH03149164 A JP H03149164A JP 28171589 A JP28171589 A JP 28171589A JP 28171589 A JP28171589 A JP 28171589A JP H03149164 A JPH03149164 A JP H03149164A
- Authority
- JP
- Japan
- Prior art keywords
- steel pipe
- appearance
- polishing
- machine
- corrector
- 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
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 48
- 239000010959 steel Substances 0.000 title claims abstract description 48
- 238000005498 polishing Methods 0.000 claims abstract description 50
- 239000003963 antioxidant agent Substances 0.000 claims description 20
- 230000003078 antioxidant effect Effects 0.000 claims description 20
- 229910001335 Galvanized steel Inorganic materials 0.000 claims description 9
- 239000008397 galvanized steel Substances 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 238000000151 deposition Methods 0.000 claims 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 5
- 238000007747 plating Methods 0.000 abstract description 5
- 229910052725 zinc Inorganic materials 0.000 abstract description 5
- 239000011701 zinc Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000002845 discoloration Methods 0.000 description 4
- 238000005246 galvanizing Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000007664 blowing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 230000003449 preventive effect Effects 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 241000473391 Archosargus rhomboidalis Species 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
Landscapes
- Grinding Of Cylindrical And Plane Surfaces (AREA)
Abstract
Description
［産業上の利用分野］
本発明は亜鉛めりき鋼管の外観調整装置に関する、 −
［従来の技術］
従来、溶融亜鉛めっき加工された亜鉛めっき鋼管は、金
属製傾斜ローラーを備えた矯正機にて矯正される。
［発明が解決しようとする課Ｍ］
黙しながら、矯正機にて矯正される亜鉛めっき鋼管には
、下記（１） 、（２）の問題点がある。
（１）亜鉛めっき鋼管の表面のうち、矯正機の金属製ロ
ーラーに接触する部分が、該金属ローラーにて研磨され
た状態となって光沢を生ずる。この時、鋼管は傾斜配置
されている上記ローラーによりらせん移動せしめられる
ものであるため、上記光沢はスパイラルマークとなって
管全長に残り、商品価値を低下する。
尚、上記スパイラルマークの発生を防止するため、矯正
機のリーラ−にウレタン等の樹脂皮膜を施すことも考え
られるが、この基台には、金属製ローラーに比して寿命
が短く、鋼管原単価が上昇する。
（２） ！１［！鉛めりき鋼管の溶融亜鉛めっき加工過
程で、搬送、固定、或いは内、面余剰亜鉛除去のための
蒸気ブローを施す際の湿れ蒸気等により、めっき面に変
色や軽微な掻き疵を生じ、商品価値を低下する。
尚、上記めりき面の変色や軽微な掻き疵を手直しするた
め、その表面に塗料を塗布することも考えられるが、こ
の場合には商品価値を十分には回復できず、鋼管原単価
も上昇する。
本発明は、矯正機に樹脂製ローラーを用いたり、手直し
作業を伴うことなく、簡素な設備により、矯正後の管の
表面の全面に光沢のある外観を実現し、鋼管原単価を上
昇することなく、該鋼管の商品価値を向上させることを
目的とする。
［課題を解決するための手段］
請求項１に記載の本発明は、金属製傾斜ローラーを備え
た矯正機にて矯正される亜鉛めっき鋼管の外ａ謂整装置
において、空圧又は電動機等にて回転速度を調整可能と
される回転式研磨具を備え、該研磨具の鋼管への圧接力
を調整可能とされる研磨装置を、矯正機の出側に配設し
たものである。
請求項２に記載の本発明は、前記研磨装置の出側に、研
磨後の鋼管表面に酸化防止剤を被着する酸化防止剤供給
装置を配置したものである。
［作用］
請求項１に記載の本発明によれば、下記（１）〜（３）
の作用がある。
（１）研磨装置は、矯正機の傾斜ローラーにてらせん移
動（回転しながらの前進移＃／ｈ）せしめられる鋼管に
回転式研磨具を圧接し、鋼管表面の全面を研磨する。
この研磨により、該鋼管表面に生じている前述した如く
の、■矯正機の金属製ローラーによるスパイラルマーク
、■溶融亜鉛めっき加工過程での搬送、固定、或いは内
面余剰亜鉛除去のための蒸気ブローを施す際の漏れ蒸気
等によるめっき面の変色や軽微な掻き疵を、消去し、そ
の表面の全面に光沢のある外観を実現できる。
（２）この時、鋼管は、矯正機にて加えられるらせん移
動を利用して研磨装置に対しその全表面を相対移動する
ものであり、研磨装置のための設備を単純かつ小規模に
できる。従って、鯛管原単価を上昇させない。
（３）又、研磨具の材質選定、空圧又は電流制御による
研磨具の回転速度調整、研磨具の圧接力調整により、鋼
管ｑ施す外観性状は、任意に調整できる。
尚、研磨装置が鋼管表面に加える研磨は、研磨具の材質
選定、圧接力選定により、め−）き表面の数μ厚の酸化
層を除去するのみて、めっき厚は何ら減少せしめないも
のとすることができる。
請求項２に記載の本発明によれば、下記（４）、（５）
の作用がある。
（４）酸化防止剤供給装置は、研磨装置にて研磨された
直後の、研磨後酸化の進行していない鋼管表面に、防錆
油等の酸化防止剤を付与することにより、管表面の光沢
のある外観を長期確保できる。
（５）この時、鋼管は、矯正機にて加えられるらせん移
動を利用して酸化防止剤供給装置に対しその全ｉ面を相
対移動するものであり、酸化防止剤供給装置のための設
備を単純かつ小規模にてきる。従って、鋼管原単価を上
昇させない。
即ち、請求項１．２に記載の本発明によれば、矯正機に
樹脂製ローラーを用Ｊｔまたり、手直し作業を伴うこと
なく、簡素な設備により、矯正後の管の表面の全面に光
沢のある外観を実現し、鋼管原単価を上昇することなく
、該鋼管の商品価値を向上させることができる。
尚、請求項１．２に記載の本発明にあっては、矯正機出
側のオンラインに、研磨装置、或いは酸化防止剤供給装
「を配置するものであるため、外観向上に際し、鋼管を
オフラインに持ち出すことにて生産性を低下させること
がなし１゜[Industrial Field of Application] The present invention relates to an apparatus for adjusting the appearance of galvanized steel pipes. be corrected. [Problem M to be solved by the invention] A galvanized steel pipe straightened by a straightening machine has the following problems (1) and (2). (1) The part of the surface of the galvanized steel pipe that comes into contact with the metal roller of the straightening machine is polished by the metal roller and becomes glossy. At this time, since the steel pipe is moved in a spiral manner by the inclined rollers, the gloss becomes a spiral mark that remains over the entire length of the pipe, reducing its commercial value. In order to prevent the above-mentioned spiral marks from occurring, it may be possible to apply a resin film such as urethane to the reeler of the straightening machine, but this base has a shorter lifespan than metal rollers and is not suitable for raw steel pipes. Unit price increases. (2)! 1 [! During the hot-dip galvanizing process of lead-plated steel pipes, discoloration and slight scratches may occur on the plated surface due to wet steam during transportation, fixing, or steam blowing to remove excess zinc from the inner surface. Decrease product value. In addition, in order to repair the discoloration and minor scratches on the machined surface, it is possible to apply paint to the surface, but in this case, the product value cannot be fully restored and the unit price of the steel pipe will also increase. do. The present invention achieves a glossy appearance on the entire surface of a straightened pipe using simple equipment without using a resin roller in a straightening machine or involving rework, thereby increasing the unit price of steel pipes. The purpose is to improve the commercial value of the steel pipe. [Means for Solving the Problems] The present invention as set forth in claim 1 provides a so-called outer straightening device for galvanized steel pipes that is straightened by a straightening machine equipped with metal inclined rollers. A polishing device is provided on the outlet side of the straightening machine, and is equipped with a rotary polishing tool whose rotational speed can be adjusted by adjusting the rotation speed. According to a second aspect of the present invention, an antioxidant supplying device for applying an antioxidant to the surface of the steel pipe after polishing is disposed on the exit side of the polishing device. [Function] According to the present invention as set forth in claim 1, the following (1) to (3)
There is an effect. (1) The polishing device presses a rotary polishing tool against a steel pipe that is moved spirally (forward movement #/h while rotating) by an inclined roller of a straightening machine, and polishes the entire surface of the steel pipe. This polishing removes the above-mentioned spiral marks caused by the metal rollers of the straightening machine, and steam blowing for conveyance, fixation, or removal of excess zinc on the inner surface during the hot-dip galvanizing process. Discoloration and minor scratches on the plated surface caused by leaked steam during application can be eliminated, and a glossy appearance can be achieved over the entire surface. (2) At this time, the entire surface of the steel pipe is moved relative to the polishing device using the spiral movement applied by the straightening machine, and the equipment for the polishing device can be made simple and small-scale. Therefore, the unit price of sea bream tubes will not increase. (3) Furthermore, the appearance of the steel pipe q can be adjusted as desired by selecting the material of the polishing tool, adjusting the rotational speed of the polishing tool by air pressure or electric current control, and adjusting the pressure contact force of the polishing tool. In addition, the polishing applied to the steel pipe surface by the polishing device only removes an oxide layer several microns thick from the plating surface, and does not reduce the plating thickness in any way, depending on the material selection of the polishing tool and the selection of the pressure force. can do. According to the present invention according to claim 2, the following (4) and (5)
There is an effect. (4) The antioxidant supply device applies an antioxidant such as rust preventive oil to the surface of the steel pipe, which has not been oxidized immediately after polishing with the polishing device, to give the pipe surface a glossy appearance. A certain appearance can be maintained for a long time. (5) At this time, the entire i-plane of the steel pipe is moved relative to the antioxidant supply device using the spiral movement applied by the straightening machine, and the equipment for the antioxidant supply device is required. It can be simple and small-scale. Therefore, the unit price of steel pipes will not increase. That is, according to the present invention as set forth in claim 1.2, the straightening machine uses resin rollers, and the entire surface of the straightened tube can be glossy with simple equipment without any rework. It is possible to achieve a certain appearance and improve the commercial value of the steel pipe without increasing the unit price of the steel pipe. In addition, in the present invention as set forth in claim 1.2, since the polishing device or the antioxidant supply device is arranged online at the exit side of the straightening machine, when improving the appearance, the steel pipe is taken offline. There is no reduction in productivity by taking it out to other places1゜
第１図は本発明の一実施例を示す模式図、第２図は矯正
機を示す模式図である。
亜鉛めっき鋼管ｌは、溶融亜鉛めっき加工後、第２図に
示す矯正機２にて矯正される。即ち、矯正機２は、複数
組のそれぞれ対向する金属製傾斜ローラー３を矯正機２
の中央ラインに対して交互に反対側に偏倚して配置し、
各組のローラー３の間に鋼管１を通過させ、隣接する各
組のローラー３による矯正力を鋼管１の各部に作用させ
、鋼管１の曲がりを矯正可能とする。鋼管１は、傾斜ロ
ーラー３の回転力を得てらせん移動する。
外ｗｔ調整装置１０は、第１図に示す如く、上記矯正機
２の出側に配置される研磨装置２０と、酸化防止剤供給
装置３０とから構成される装蛍磨装置２０は、空圧にて
回転速度を調整可能とされるワイヤサンダ一等の回転式
研磨具２１を備える。研磨装置２０は、回し八ンドル付
送りねじ２２の回転操作により、研磨具２１を鋼管１に
対して進退し、該研磨具２１の鋼管１への圧接力を調整
できる。
酸化防止剤供給装Ｗ３０は、研磨装Ｗ２０の出側に酸化
防止剤噴霧ノズル３１を配置し、研磨直後の鋼管１の表
面に防錆油等の酸化防止剤を被着する。
次に、上記実施例の作用について説明する。
（１）研磨装置２０は、矯正機２の傾斜ローラー２にて
らせん移Ｉｌｌ（回転しながらの前進移動）せしめられ
る鋼管ｌに回転式研磨具２１を圧接し、鋼管１の表面の
全面を研磨する。
この研磨により、該鋼管ｌの表面に生じている前述した
如くの、■矯正機２の金属製ローラー３によるスパイラ
ルマーク、■溶融亜鉛めっき加工過程での搬送、固定、
或いは内面余剰亜鉛除去のための蒸気ブローを施す際の
漏れ蒸気によるめっき面の変色や軽微な掻き疵を消去し
、その表面の全面に光沢のある外観を実現できる。
（２）この時、−鋼管ｌは、矯正ａ２にて加えられるら
せん移動を利用して研磨装Ｗ２０に対しその全表面を相
対移動するものであり、研磨装置ｆ２０のための設備を
単純かつ小規模にできる。従って、鋼管１の原単価を上
昇させない。
（３）又、研磨具２１の材質選定、空圧制御による研磨
具２１の回転速度調整、回し八ンドル付送りねじ２２に
よる研磨具２１の圧接力調整により、鋼管１に施す外観
性状は任意に調整できる。
尚、研磨装置２０が鋼管１の表面に加える研磨は、研磨
具２１の材質選定、圧接力調整により、めっき表面の数
μ厚の酸化層を除去するのみて、めっき厚は何ら減少せ
しめないものとすることができる。
（４）酸化防止剤供給装置３０は、研磨装Ｗ２０にて研
磨された直後の、研磨後酸化の進行していない鋼管１の
表面に、防錆油等の酸化防止剤を付与することにより、
管表面の光沢のある外観を長期確保できる。
（５）この時、鋼管ｌは、矯正機２にて加えられるらせ
ん移動を利用して酸化防止剤噴霧ノズル３１に対しその
全表面を相対移動するものてあり、酸化防止剤供給装Ｗ
３０のための設備を単純かつ小規模にできる。従って、
鋼管１の原単価を上昇させない。
即ち、上記実施例によれば、矯正Ｉ１２に樹脂製ローラ
ーを用いたり、手直し作業を伴うことなく、簡素な設備
により、矯正後の鋼管ｌの表面の全面に光沢のある外観
を実現し、鋼管ｌの原単価を上昇させることなく、該鋼
管１の商品価値を向上させることができる。
尚、上記実施例にあっては、矯正機２の出側のオンライ
ンに、研磨装Ｎ２０、及び酸化防止剤供給装３１３０を
配置するものであるため、外観向上に際し、鋼管ｌをオ
フラインに持ち出すことにて生産性を低下することがな
い。
［発明の効果］
以上のように本発明によれば、矯正機に樹脂製ローラー
を用いたり、手直し作業を伴うことなく、簡素な設備に
より、矯正後の管の表面の全面に光沢のある外観を実現
し、鋼管原単価を上昇することなく、該鋼管の商品価値
を向上させることができる。FIG. 1 is a schematic diagram showing an embodiment of the present invention, and FIG. 2 is a schematic diagram showing a straightening machine. After hot-dip galvanizing, the galvanized steel pipe 1 is straightened by a straightening machine 2 shown in FIG. That is, the straightening machine 2 includes a plurality of sets of metal inclined rollers 3 facing each other.
are arranged alternately offset to opposite sides with respect to the center line of
The steel pipe 1 is passed between each set of rollers 3, and the straightening force of each adjacent set of rollers 3 is applied to each part of the steel pipe 1, so that the bend in the steel pipe 1 can be corrected. The steel pipe 1 receives the rotational force of the inclined rollers 3 and moves in a spiral manner. As shown in FIG. 1, the external wt adjustment device 10 is a fluorinated polishing device 20 that is composed of a polishing device 20 disposed on the exit side of the straightening machine 2 and an antioxidant supply device 30. A rotary polishing tool 21 such as a wire sander whose rotational speed can be adjusted is provided. The polishing device 20 moves the polishing tool 21 forward and backward with respect to the steel pipe 1 by rotating the feed screw 22 with a rotating handle, and can adjust the pressing force of the polishing tool 21 against the steel pipe 1. The antioxidant supply device W30 has an antioxidant spray nozzle 31 disposed on the outlet side of the polishing device W20, and applies an antioxidant such as rust preventive oil to the surface of the steel pipe 1 immediately after polishing. Next, the operation of the above embodiment will be explained. (1) The polishing device 20 presses the rotary polishing tool 21 onto the steel pipe 1 which is spirally moved (moving forward while rotating) by the inclined rollers 2 of the straightening machine 2, and polishes the entire surface of the steel pipe 1. do. As a result of this polishing, as mentioned above, (1) spiral marks caused by the metal rollers 3 of the straightening machine 2, (2) conveyance and fixation during the hot-dip galvanizing process,
Alternatively, it is possible to eliminate discoloration and slight scratches on the plated surface due to leaked steam during steam blowing to remove excess zinc from the inner surface, and to achieve a glossy appearance on the entire surface. (2) At this time, the entire surface of the steel pipe l is moved relative to the polishing device W20 using the spiral movement applied in the straightening a2, and the equipment for the polishing device f20 is simple and small. Can be scaled up. Therefore, the unit price of the steel pipe 1 is not increased. (3) In addition, the external appearance of the steel pipe 1 can be made arbitrarily by selecting the material of the polishing tool 21, adjusting the rotation speed of the polishing tool 21 using pneumatic control, and adjusting the pressure contact force of the polishing tool 21 using the feed screw 22 with a turning handle. Can be adjusted. Note that the polishing applied to the surface of the steel pipe 1 by the polishing device 20 only removes an oxide layer several μ thick on the plating surface by selecting the material of the polishing tool 21 and adjusting the pressure contact force, but does not reduce the plating thickness in any way. It can be done. (4) The antioxidant supply device 30 applies an antioxidant such as rust preventive oil to the surface of the steel pipe 1, which has not been oxidized after polishing, immediately after being polished by the polishing tool W20.
The shiny appearance of the pipe surface can be maintained for a long time. (5) At this time, the entire surface of the steel pipe l is moved relative to the antioxidant spray nozzle 31 using the spiral movement applied by the straightening machine 2, and the antioxidant supply device W
30 can be made simple and small-scale. Therefore,
Do not increase the unit price of steel pipe 1. That is, according to the above embodiment, a glossy appearance can be achieved on the entire surface of the steel pipe l after straightening with simple equipment without using a resin roller for straightening I12 or with any rework, and the steel pipe can be straightened. The commercial value of the steel pipe 1 can be improved without increasing the unit price of steel pipe 1. In the above embodiment, the polishing device N20 and the antioxidant supply device 3130 are placed online on the outlet side of the straightening machine 2, so when improving the appearance, it is not necessary to take the steel pipe l offline. There is no reduction in productivity. [Effects of the Invention] As described above, according to the present invention, a glossy appearance can be achieved on the entire surface of a straightened tube using simple equipment without using a resin roller in a straightening machine or involving rework. This makes it possible to improve the commercial value of the steel pipe without increasing the unit price of the steel pipe.
第１図は本発明の一実施例を示す模式図、第２図は矯正
機を示す模式図である。
１・・・亜鉛めっき鋼管、
２・・・矯正機、
３・・・金属製傾斜ローラー。
１０−・・外観調整装置、
２０ニー・研磨装置、
２１−・・研磨具、
２２−・・回し八ンドル付送りねじ、
３０−・・酸化防止剤供給装置、
３１−・・酸化防止剤噴霧ノズル。FIG. 1 is a schematic diagram showing an embodiment of the present invention, and FIG. 2 is a schematic diagram showing a straightening machine. 1... Galvanized steel pipe, 2... Straightening machine, 3... Metal inclined roller. 10-- Appearance adjustment device, 20 Knee polishing device, 21-- Polishing tool, 22-- Feed screw with turning handle, 30-- Antioxidant supply device, 31-- Antioxidant spray nozzle.
Claims (2)
る亜鉛めっき鋼管の外観調整装置において、空圧又は電
動機等にて回転速度を調整可能とされる回転式研磨具を
備え、該研磨具の鋼管への圧接力を調整可能とされる研
磨装置を、矯正機の出側に配設したことを特徴とする亜
鉛めっき鋼管の外観調整装置。(1) A device for adjusting the appearance of galvanized steel pipes that is straightened using a straightening machine equipped with metal inclined rollers, which is equipped with a rotary polishing tool whose rotational speed can be adjusted by air pressure or an electric motor, and the polishing A device for adjusting the appearance of galvanized steel pipes, characterized in that a polishing device capable of adjusting the force with which the tool is pressed against the steel pipe is disposed on the exit side of a straightening machine.
防止剤を被着する酸化防止剤供給装置を配設した請求項
１記載の亜鉛めっき鋼管の外観調整装置。(2) The apparatus for adjusting the appearance of a galvanized steel pipe according to claim 1, further comprising an antioxidant supplying apparatus for depositing an antioxidant on the surface of the steel pipe after polishing, on the outlet side of the polishing apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28171589A JPH03149164A (en) | 1989-10-31 | 1989-10-31 | Appearance adjusting device for zinc-plated steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28171589A JPH03149164A (en) | 1989-10-31 | 1989-10-31 | Appearance adjusting device for zinc-plated steel pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03149164A true JPH03149164A (en) | 1991-06-25 |
Family
ID=17642976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28171589A Pending JPH03149164A (en) | 1989-10-31 | 1989-10-31 | Appearance adjusting device for zinc-plated steel pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03149164A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100908633B1 (en) * | 2009-02-05 | 2009-07-21 | 대한산업(주) | Method for removing scratch on sealing face of mechanic component |
| KR101136512B1 (en) * | 2009-06-01 | 2012-04-18 | 대한산업(주) | Apparatus for removing scratch on sealing face of mechanic component |
| JP2020503184A (en) * | 2016-12-28 | 2020-01-30 | アドバンスト・ドレネージ・システムズ・インコーポレイテッドＡｄｖａｎｃｅｄ Ｄｒａｉｎａｇｅ Ｓｙｓｔｅｍｓ Ｉｎｃ． | Pipe processing system and method |
-
1989
- 1989-10-31 JP JP28171589A patent/JPH03149164A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100908633B1 (en) * | 2009-02-05 | 2009-07-21 | 대한산업(주) | Method for removing scratch on sealing face of mechanic component |
| KR101136512B1 (en) * | 2009-06-01 | 2012-04-18 | 대한산업(주) | Apparatus for removing scratch on sealing face of mechanic component |
| JP2020503184A (en) * | 2016-12-28 | 2020-01-30 | アドバンスト・ドレネージ・システムズ・インコーポレイテッドＡｄｖａｎｃｅｄ Ｄｒａｉｎａｇｅ Ｓｙｓｔｅｍｓ Ｉｎｃ． | Pipe processing system and method |
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