JPH0247221A - Surface heat treatment for inner face of tube - Google Patents
Surface heat treatment for inner face of tubeInfo
- Publication number
- JPH0247221A JPH0247221A JP63197073A JP19707388A JPH0247221A JP H0247221 A JPH0247221 A JP H0247221A JP 63197073 A JP63197073 A JP 63197073A JP 19707388 A JP19707388 A JP 19707388A JP H0247221 A JPH0247221 A JP H0247221A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- heat treatment
- inner face
- concave lens
- optical system
- 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
- 238000010438 heat treatment Methods 0.000 title claims abstract description 14
- 230000003287 optical effect Effects 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 8
- 239000013307 optical fiber Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005280 amorphization Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
- C21D9/14—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes wear-resistant or pressure-resistant pipes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/0604—Shaping the laser beam, e.g. by masks or multi-focusing by a combination of beams
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Plasma & Fusion (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は管、特に耐食性が要求される配管、内面を表面
処理する方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to pipes, particularly pipes requiring corrosion resistance, and a method for surface treating the inner surface.
従来の管内の表面処理法の一態様を第２図によって説明
する。One aspect of a conventional surface treatment method inside a pipe will be explained with reference to FIG.
レーザビーム１を単なる平面反射鏡２で管９内面に照射
していたため、管９を回転させるカベまたは平面反射鏡
２を回転させ、さらに、管９を軸方向に移動させていた
。Since the laser beam 1 was irradiated onto the inner surface of the tube 9 using a simple plane reflecting mirror 2, the wall for rotating the tube 9 or the plane reflecting mirror 2 was rotated, and the tube 9 was further moved in the axial direction.
このような場合、熱処理部はすでに施工された隣接部を
施工することになシ、管が鉄鋼材料であると、境界部で
軟化する問題があった。In such a case, it is necessary to apply the heat treatment part to an adjacent part that has already been constructed, and if the pipe is made of steel, there is a problem that the pipe becomes softened at the boundary part.
また、最近注目されているアモルファス化熱処理では境
界部がアモルファス化できない問題がある。Furthermore, in the amorphization heat treatment that has recently been attracting attention, there is a problem that the boundary portion cannot be made amorphous.
本発明は従来の熱処理法の不具合、すなわち不連続部を
解消しようとするもので、管内面をある幅で円周上同時
に加熱し、かつ、均一速度で軸方向にレーザビームを移
動させるようにして管内面金て均一に熱処理が行える方
法を提供しようとするものである。The present invention aims to solve the problem of discontinuities in conventional heat treatment methods, by simultaneously heating the inner surface of the tube over a certain width around the circumference, and by moving the laser beam in the axial direction at a uniform speed. The purpose of this invention is to provide a method that allows uniform heat treatment of the inner surface of the tube.
本発明は管内面をレーザ光により表面熱処理するにあた
シ、ビームを凹レンズにより拡げ九後円錐形反射＠ｌ！
ｔ−用いて管内面の円周上に均一にビームが当たるよう
にし、しかも軸方向に管または光学系を移動させること
を特徴とする特内面の表面熱処理法である。In the present invention, when the inner surface of a tube is subjected to surface heat treatment with a laser beam, the beam is expanded by a concave lens and reflected in a conical shape afterward.
This is a surface heat treatment method for a special inner surface, which is characterized in that the beam is uniformly applied to the circumference of the inner surface of the tube using a t-ray tube, and the tube or optical system is moved in the axial direction.
凹レンズは集光されたレーザビームを拡げる作用をし、
円錐形反射鏡は管内面の円周上に同時にビームを照射す
る作用をする。また、管又は凹レンズと円錐形反射鏡よ
シなる光学系を軸方向に駆動させることによって管内面
の全域が均一に熱処理できるようになる。The concave lens acts to spread the focused laser beam,
The conical reflector functions to irradiate the beam simultaneously onto the circumference of the inner surface of the tube. Further, by driving the optical system consisting of the tube or a concave lens and a conical reflecting mirror in the axial direction, the entire inner surface of the tube can be uniformly heat-treated.
以下、本発明の一実施例を第１図によって説明する。 An embodiment of the present invention will be described below with reference to FIG.
発掘器３よシ発掘されたレーザビーム１は入射光学系４
で絞られて元ファイバ５に入υ、出射光学系６よ）出た
後、凹レンズ７で拡げら瓢次いで支持台１０によって支
持された円錐形反射ｆ１８Ｂにより管９の内面を円周状
に照射され管９内表面を均一に加熱する。The laser beam 1 excavated by the excavator 3 is connected to the incident optical system 4.
After being condensed by the concave lens 7, it is expanded by the concave lens 7, and then the inner surface of the tube 9 is irradiated in a circumferential manner by the conical reflection f18B supported by the support stand 10. The inner surface of the tube 9 is heated uniformly.
管９は管駆動装置１１により軸方向に移動され、管９内
面は順次オーバラップされることなく均一に熱処理され
る。The tube 9 is moved in the axial direction by a tube drive device 11, and the inner surface of the tube 9 is sequentially and uniformly heat-treated without overlapping.
上記実施例は管９を軸方向に移動する例を示したが、管
９を移動させる代シに、凹レンズ７及び円錐形反射鏡８
よシなる光学系を移動させるようにすることもよいこと
は当然である。The above embodiment shows an example in which the tube 9 is moved in the axial direction, but instead of moving the tube 9, the concave lens 7 and the conical reflecting mirror 8 are
It goes without saying that it is also good to move a better optical system.
本発明によれば管内面を均一に熱処理できるため、従来
の熱処理で生じていた不均一（境界部の軟化や非アモル
ファス化）を防止できる。According to the present invention, since the inner surface of the tube can be uniformly heat-treated, it is possible to prevent non-uniformity (softening of the boundary portion and non-amorphous state) that occurs in conventional heat treatment.
第１図は本発明の一実施例の説明図、第２図は従来の管
内面の熱処理法の一態様の説明図である。FIG. 1 is an explanatory diagram of an embodiment of the present invention, and FIG. 2 is an explanatory diagram of an embodiment of a conventional heat treatment method for the inner surface of a tube.
Claims (1)
ムを凹レンズにより拡げた後円錐形反射鏡を用いて管内
面の円周上に均一にビームが当たるようにし、しかも軸
方向に管または光学系を移動させることを特徴とする管
内面の表面熱処理法。When performing surface heat treatment on the inner surface of a tube with a laser beam, the beam is expanded using a concave lens, and then a conical reflector is used to uniformly apply the beam to the circumference of the inner surface of the tube, and the tube or optical system is moved in the axial direction. A method for surface heat treatment of the inner surface of a tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63197073A JPH0247221A (en) | 1988-08-09 | 1988-08-09 | Surface heat treatment for inner face of tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63197073A JPH0247221A (en) | 1988-08-09 | 1988-08-09 | Surface heat treatment for inner face of tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0247221A true JPH0247221A (en) | 1990-02-16 |
Family
ID=16368267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63197073A Pending JPH0247221A (en) | 1988-08-09 | 1988-08-09 | Surface heat treatment for inner face of tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0247221A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5719373A (en) * | 1996-11-18 | 1998-02-17 | Ingersoll-Rand Company | Laser device for heating a surface formed by a small diameter bore in a workpiece |
| US5719376A (en) * | 1996-11-18 | 1998-02-17 | Ingersoll-Rand Company | Method for laser heating a surface formed by a circular bore extending through a workpiece |
| US8304686B2 (en) | 2006-05-11 | 2012-11-06 | Kabushiki Kaisha Toshiba | Laser shock hardening method and apparatus |
| DE102012109937A1 (en) * | 2012-10-18 | 2014-04-24 | Limo Patentverwaltung Gmbh & Co. Kg | Device for applying light to an inside of a cylinder and beam transformation device for such a device |
| US20160151862A1 (en) * | 2012-02-10 | 2016-06-02 | Limo Patentverwaltung Gmbh & Co. Kg | Device for laser processing of a surface of a workpiece or for post-treatment of a coating on the outside or the inside of a workpiece |
| JP2021508287A (en) * | 2018-07-23 | 2021-03-04 | エルジー・ケム・リミテッド | Nanoparticle synthesizer and nanoparticle synthesis method using it |
-
1988
- 1988-08-09 JP JP63197073A patent/JPH0247221A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5719373A (en) * | 1996-11-18 | 1998-02-17 | Ingersoll-Rand Company | Laser device for heating a surface formed by a small diameter bore in a workpiece |
| US5719376A (en) * | 1996-11-18 | 1998-02-17 | Ingersoll-Rand Company | Method for laser heating a surface formed by a circular bore extending through a workpiece |
| US8304686B2 (en) | 2006-05-11 | 2012-11-06 | Kabushiki Kaisha Toshiba | Laser shock hardening method and apparatus |
| US8330070B2 (en) * | 2006-05-11 | 2012-12-11 | Kabushiki Kaisha Toshiba | Laser shock hardening method and apparatus |
| US8872058B2 (en) | 2006-05-11 | 2014-10-28 | Kabushiki Kaisha Toshiba | Laser shock hardening apparatus |
| US20160151862A1 (en) * | 2012-02-10 | 2016-06-02 | Limo Patentverwaltung Gmbh & Co. Kg | Device for laser processing of a surface of a workpiece or for post-treatment of a coating on the outside or the inside of a workpiece |
| DE102012109937A1 (en) * | 2012-10-18 | 2014-04-24 | Limo Patentverwaltung Gmbh & Co. Kg | Device for applying light to an inside of a cylinder and beam transformation device for such a device |
| US9798047B2 (en) | 2012-10-18 | 2017-10-24 | Limo Patentverwaltung Gmbh & Co. Kg | Device for applying light to an inner surface of a cylinder and beam transformation device for such a device |
| JP2021508287A (en) * | 2018-07-23 | 2021-03-04 | エルジー・ケム・リミテッド | Nanoparticle synthesizer and nanoparticle synthesis method using it |
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