JPH0791587B2 - Laser hardening method for sliding shaft - Google Patents
Laser hardening method for sliding shaftInfo
- Publication number
- JPH0791587B2 JPH0791587B2 JP63132643A JP13264388A JPH0791587B2 JP H0791587 B2 JPH0791587 B2 JP H0791587B2 JP 63132643 A JP63132643 A JP 63132643A JP 13264388 A JP13264388 A JP 13264388A JP H0791587 B2 JPH0791587 B2 JP H0791587B2
- Authority
- JP
- Japan
- Prior art keywords
- laser
- sliding shaft
- sliding
- irradiation
- hardening
- 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
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Heat Treatment Of Articles (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、溝付き摺動軸の摺動部をレーザ加工機によつ
て、有効に表面層の焼入れ硬化処理を行う方法に関す
る。Description: TECHNICAL FIELD The present invention relates to a method for effectively quench-hardening a surface layer of a sliding portion of a grooved sliding shaft by a laser beam machine.
金属表面の硬化法には、高周波焼入れ、炎焼入れ、浸炭
焼入れ、窒化法、拡散浸透、金属皮膜等各種の方法があ
るが、溝付き摺動軸には硬化度、硬化層の深さの精度が
高く、かつ、自動化が容易なレーザ焼入れ法が広く使わ
れるようになつてきた。There are various methods of hardening the metal surface, such as induction hardening, flame hardening, carburizing and hardening, nitriding, diffusion and penetration, metal coating, etc. The laser quenching method, which has high cost and is easy to automate, has been widely used.
レーザ焼入れは位相のそろつた可干渉性のレーザ光をレ
ンズで集束させて工作物に照射し、高いパワー密度の熱
エネルギによつて工作物を加熱するものである。Laser hardening is a method in which coherent laser light having a uniform phase is focused by a lens and irradiated onto a work, and the work is heated by heat energy of high power density.
第3,4図に基づいて、溝付き摺動軸へのレーザ焼入れ方
法に係る従来の技術を説明する。A conventional technique relating to a laser hardening method for a grooved sliding shaft will be described with reference to FIGS.
摺動軸１は通常数値制御によつて回転及び軸方向に移動
し、静止したレーザガンによつてレーザ光が照射され
る。また摺動軸は回転のみを行い、レーザガンを軸方向
に移動させる方法もあるが何れも全自動化されている。The sliding shaft 1 normally rotates and moves in the axial direction by numerical control, and a stationary laser gun emits laser light. There is also a method of moving the laser gun in the axial direction by rotating the sliding shaft only, but all of them are fully automated.
照射は摺動部２に対して行なわれ、Ａ部から照射を開始
し、Ｂ部で照射が終了する。従つてA,B間は照射が２度
にわたつて行われるが、このようなオーバラツプは未照
射部を除くためには止むを得ない措置である。なお、溝
３部には照射されない。The irradiation is performed on the sliding portion 2, the irradiation is started from the portion A, and the irradiation is finished at the portion B. Therefore, the irradiation between A and B is performed twice, but such an overlap is an unavoidable measure to remove the non-irradiated portion. The groove 3 is not irradiated.
（１）オーバラツプ部のレーザ照射止端部付近には、レ
ーザ焼入れ特有の現象として、焼戻し層（ソフトテンパ
ーゾーンと云う）ができ、著しく硬度が低下する。(1) As a phenomenon peculiar to laser hardening, a tempering layer (called a soft temper zone) is formed in the vicinity of the laser irradiation toe of the overlapping portion, and the hardness is significantly lowered.
第６図にこの状況を示す。図は直径135mmの摺動軸に対
して、レーザ出力1.5キロワツト、速度0.8m/minで行つ
たもので、レーザ照射止端部の前後約1mmにわたつて硬
度が低下している。特に照射止端部ではピツカース硬さ
370Hv迄低下し、健全部は約700Hvで設計要求値500Hvを
上回つているが、該部では約0.6mmにわたつて下回つて
いる。This situation is shown in FIG. The figure is for a sliding shaft with a diameter of 135 mm, with a laser output of 1.5 kw and a speed of 0.8 m / min. The hardness decreases about 1 mm before and after the laser irradiation toe. Especially at the irradiation toe, the Pitsukas hardness
It decreased to 370 Hv, and the sound part is about 700 Hv, which exceeds the design requirement value of 500 Hv, but it is below about 0.6 mm in this part.
第５図は上記オーバラツプ部以外の個所の硬度を示すも
ので、安定して約700Hvの値を保つている。なお、硬度
は表面から深さ0.05mmでの計測値である。FIG. 5 shows the hardness of the parts other than the above-mentioned overlapping part, and stably maintains the value of about 700 Hv. The hardness is a measured value at a depth of 0.05 mm from the surface.
（２）従来、照射止端部付近の焼戻し層は第3,4図に示
すように同じ位相で、軸方向一直線上に揃つていた。こ
のため摺動軸が軸方向に摺動すると照射止端部前後のみ
が摩耗し、該部から流体が漏洩する場合があつた。(2) Conventionally, the tempered layers near the irradiation toe were aligned in the same phase in the axial direction as shown in FIGS. For this reason, when the sliding shaft slides in the axial direction, only the front and rear of the irradiation toe portion may be worn and fluid may leak from the portion.
本発明は上記技術水準に鑑み、複数個の円周溝を有する
摺動軸の摺動面をレーザ加工機によつて表面焼入れする
に際し、従来法におけるような不具合を解消しうる方法
を提供しようとするものである。In view of the above-mentioned state of the art, the present invention is to provide a method capable of solving the problems as in the conventional method when surface-hardening the sliding surface of a sliding shaft having a plurality of circumferential grooves with a laser beam machine. It is what
本発明は外周部に複数個の円周溝を有する摺動軸の摺動
面をレーザ加工機によつて表面焼入れするに際して、複
数個の摺動面の円周方向に沿つて移動するレーザ光の照
射開始と照射終了時のオーバラツプ受光部の位相を、摺
動面ごとに円周方向へずらすことを特徴とする摺動軸へ
のレーザ焼入れ方法である。The present invention provides a laser beam that moves along the circumferential direction of a plurality of sliding surfaces when the sliding surface of a sliding shaft having a plurality of circumferential grooves on the outer peripheral portion is surface hardened by a laser processing machine. Is a laser hardening method for a sliding shaft, characterized in that the phase of the overlapping light receiving portion at the start and end of the irradiation is shifted in the circumferential direction for each sliding surface.
すなわち、本発明は、レーザ照射の開始及び終了に伴う
オーバラツプ受光部の円周方向位相を摺動面ごとにずら
すようにしてレーザ焼入れを行うもので、数値制御用テ
ープフオーマツトの記憶情報を改めるのみで、全自動レ
ーザ表面焼入れ装置はそのままとして実施できる方法で
ある。That is, according to the present invention, the laser hardening is performed by shifting the circumferential phase of the overlapping light receiving part with the start and end of the laser irradiation for each sliding surface, and the stored information of the numerical control tape format is revised. This is a method that can be carried out with the fully automatic laser surface quenching device as it is.
（１）オーバラツプ部の位相が変わるため、従来のよう
な集中的な摩耗が起らず、従つて、流体の漏洩を防止す
ることができる。(1) Since the phase of the overlapping portion is changed, the concentrated wear unlike in the conventional case does not occur, and thus the fluid leakage can be prevented.
（２）加工はテープフオーマツトの記憶情報を変えるの
みに止まり、何等新しい設備を付与することなくして全
自動レーザ焼入れが行われる。(2) The processing is stopped only by changing the stored information of the tape format, and the fully automatic laser hardening is performed without adding any new equipment.
本発明の一実施例を第1,2図に基づいて詳細に説明す
る。An embodiment of the present invention will be described in detail with reference to FIGS.
摺動軸１の摺動部２のレーザ光照射開始Ａ部と照射終了
Ｂ部のオーバラツク受光部ABは、溝３を挟んで、円周方
向に30°の位相を保つて隣接するオーバラツプ部がずら
されている。The laser beam irradiation start portion A and the irradiation end portion B of the sliding portion 2 of the sliding shaft 1 are overlapped by the overlapping light receiving portion AB with the groove 3 sandwiched therebetween while maintaining a phase of 30 ° in the circumferential direction. It has been staggered.
摺動軸１はステツピングモータによつて駆動され、数値
（デジタル）指令によつて回転角、回転速度の各動作が
正確に制御され、オーバラツプ受光部ABの位相とその長
さは極めて高い精度で配設される。The sliding shaft 1 is driven by a stepping motor, and each operation of the rotation angle and the rotation speed is accurately controlled by a numerical (digital) command, and the phase and length of the overlapping photodetector AB are extremely accurate. It is arranged in.
本発明は、何んら新しい設備を必要とすることなく実施
でき、かつ、レーザ焼入れされた溝付き摺動軸からの流
体漏洩がなくなり、かつ、その寿命を大巾に延長して、
機器の信頼性を向上させる。The present invention can be carried out without requiring any new equipment, and there is no fluid leakage from the laser-quenched grooved sliding shaft, and its life is greatly extended,
Improve equipment reliability.
第1,2図は本発明に係るオーバラツプ部配置の説明図、
第3,4図は従来のオーバラツプ部配置の説明図、第５図
はオーバラツプ以外の箇所の表面硬度分布図、第６図は
オーバラツプ箇所の表面硬度分布図である。 １……摺動軸、２……摺動面、３……円周溝、Ａ……レ
ーザ光照射開始部、Ｂ……レーザ光照射終了部、AB……
レーザ光のオーバラツプ受光部。1 and 2 are explanatory views of the arrangement of the overlapping part according to the present invention,
FIGS. 3 and 4 are explanatory views of the conventional arrangement of the overlapping portion, FIG. 5 is a surface hardness distribution chart of a portion other than the overlapping portion, and FIG. 6 is a surface hardness distribution chart of the overlapping portion. 1 ... Sliding axis, 2 ... Sliding surface, 3 ... Circumferential groove, A ... Laser light irradiation start portion, B ... Laser light irradiation end portion, AB ...
Overlap light receiving unit for laser light.
Claims (1)
摺動面をレーザ加工機によつて表面焼入れするに際し
て、複数個の摺動面の円周方向に沿つて移動するレーザ
光の照射開始と照射終了時のオーバラツプ受光部の位相
を、摺動面ごとに円周方向へずらすことを特徴とする摺
動軸へのレーザ焼入れ方法。1. When a sliding surface of a sliding shaft having a plurality of circumferential grooves on its outer peripheral portion is surface hardened by a laser beam machine, the sliding surface is moved along the circumferential direction of the plurality of sliding surfaces. A laser hardening method for a sliding shaft, characterized in that the phase of the overlapping light-receiving portion at the start and end of laser light irradiation is shifted in the circumferential direction for each sliding surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63132643A JPH0791587B2 (en) | 1988-06-01 | 1988-06-01 | Laser hardening method for sliding shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63132643A JPH0791587B2 (en) | 1988-06-01 | 1988-06-01 | Laser hardening method for sliding shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01306526A JPH01306526A (en) | 1989-12-11 |
| JPH0791587B2 true JPH0791587B2 (en) | 1995-10-04 |
Family
ID=15086121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63132643A Expired - Fee Related JPH0791587B2 (en) | 1988-06-01 | 1988-06-01 | Laser hardening method for sliding shaft |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0791587B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111451711A (en) * | 2020-04-10 | 2020-07-28 | 西安灯芯草信息科技有限公司 | Coal machine part repairing and reinforcing method |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2657437B2 (en) * | 1991-09-10 | 1997-09-24 | 株式会社日立製作所 | Stress corrosion cracking resistant austenitic material and method for producing the same |
| JP4790767B2 (en) | 2008-07-16 | 2011-10-12 | 川崎重工業株式会社 | Swash plate type hydraulic rotating machine |
| JP6026777B2 (en) * | 2012-05-25 | 2016-11-16 | 株式会社豊田中央研究所 | Sliding member and manufacturing method thereof |
-
1988
- 1988-06-01 JP JP63132643A patent/JPH0791587B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111451711A (en) * | 2020-04-10 | 2020-07-28 | 西安灯芯草信息科技有限公司 | Coal machine part repairing and reinforcing method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01306526A (en) | 1989-12-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |