JPS649382B2 - - Google Patents
Info
- Publication number
- JPS649382B2 JPS649382B2 JP59106774A JP10677484A JPS649382B2 JP S649382 B2 JPS649382 B2 JP S649382B2 JP 59106774 A JP59106774 A JP 59106774A JP 10677484 A JP10677484 A JP 10677484A JP S649382 B2 JPS649382 B2 JP S649382B2
- Authority
- JP
- Japan
- Prior art keywords
- thin
- cylinder
- walled cylinder
- hardening
- peripheral surface
- 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
Links
- 230000002093 peripheral effect Effects 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 14
- 239000002826 coolant Substances 0.000 claims description 5
- 230000001678 irradiating effect Effects 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims 1
- 238000001816 cooling Methods 0.000 description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 230000003287 optical effect Effects 0.000 description 5
- 238000011282 treatment Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- YXLXNENXOJSQEI-UHFFFAOYSA-L Oxine-copper Chemical compound [Cu+2].C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1 YXLXNENXOJSQEI-UHFFFAOYSA-L 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000011231 conductive filler Substances 0.000 description 1
- 238000001723 curing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- -1 for example Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 230000009466 transformation Effects 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
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/06—Surface hardening
- C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
Description
【発明の詳細な説明】
〔発明の技術分野〕
この発明は薄肉円筒の内周面を硬化処理する薄
肉円筒の硬化処理方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for hardening a thin-walled cylinder, which hardens the inner peripheral surface of the thin-walled cylinder.
薄肉円筒の内周面を硬化処理する方法にあつて
は、レーザ光の光束を加熱源に使用したものがあ
る。この処理方法としては、従来、第１図で示す
ように集光レンズａにて集光されたレーザ光ｂを
薄肉円筒ｃの内周面に直接照射して走査する、第
２図に示すように集光されたレーザ光ｂを反射ミ
ラーｄで薄肉円筒ｃの内周面に照射して走査す
る、あるいは第３図で示すように周方向へ一度に
光を導く反射ミラーｅを用いて薄肉円筒ｃの内周
面にレーザ光ｂを照射して走査するなどを採用し
て、表面を焼入れ、チル化、クラツデイングなど
熱硬化処理することが行われている。
As a method for hardening the inner circumferential surface of a thin-walled cylinder, there is a method that uses a beam of laser light as a heating source. Conventionally, this processing method involves directly irradiating and scanning the inner peripheral surface of a thin cylinder c with a laser beam b focused by a condensing lens a as shown in FIG. The laser beam b focused on the cylinder is scanned by irradiating it onto the inner circumferential surface of the thin-walled cylinder c using a reflecting mirror d, or as shown in Fig. The inner circumferential surface of the cylinder c is irradiated and scanned with a laser beam b, and the surface is subjected to thermosetting treatments such as hardening, chilling, and cladding.
ところで、レーザ光ｂによる硬化処理は、一般
に加工物の表面を変態点温度以上の温度に加熱し
た後、加工物がもつ自己冷却作用によつて表面を
速い速度で冷却することで加工物の表面を硬化処
理している。 By the way, in general, hardening treatment using laser beam b is performed by heating the surface of the workpiece to a temperature higher than the transformation point temperature and then cooling the surface at a high speed using the self-cooling effect of the workpiece. is hardened.
ところが、これは熱容量が大きい加工物に対し
て充分に働くものの、上述した薄肉円筒ｃの熱処
理には充分に働かない問題がある。 However, although this works well for workpieces with a large heat capacity, there is a problem in that it does not work well for the heat treatment of the thin-walled cylinder c mentioned above.
すなわち、たとえば肉厚が３mm以下のような薄
肉円筒ｃは肉厚が薄いために熱容量が小さい。こ
のため薄肉円筒ｃの自己冷却にのみではどうして
も冷却速度が不充分で、従来から薄肉円筒ｃでは
内周面が充分に硬化しない欠点をもつていた。 That is, a thin cylinder c having a wall thickness of 3 mm or less, for example, has a small heat capacity because of its thin wall thickness. For this reason, the cooling rate is inevitably insufficient for self-cooling of the thin-walled cylinder c, and conventionally, the thin-walled cylinder c has had the disadvantage that the inner circumferential surface thereof is not sufficiently hardened.
〔発明の目的〕
この発明は上記事情に着目してなされたもの
で、その目的とするところは、薄肉円筒の内周面
を充分に硬化させることができる薄肉円筒の硬化
処理方法を提供することにある。[Object of the Invention] This invention has been made in view of the above-mentioned circumstances, and its purpose is to provide a method for hardening a thin-walled cylinder that can sufficiently harden the inner circumferential surface of the thin-walled cylinder. It is in.
すなわち、この発明は薄肉円筒の外周面に円筒
状の放熱体全体を上記薄肉円筒の外周面と密着す
るように外嵌し、しかる後、上記薄肉円筒の内周
面にレーザ光の光束を照射することにより、放熱
体で薄肉円筒における自己冷却を促進しようとす
るものである。
That is, in this invention, the entire cylindrical heat dissipating body is fitted onto the outer peripheral surface of a thin cylinder so as to be in close contact with the outer peripheral surface of the thin cylinder, and then a beam of laser light is irradiated onto the inner peripheral surface of the thin cylinder. By doing so, the heat sink is intended to promote self-cooling in the thin cylinder.
以下、この発明方法を第４図ないし第９図に示
す第１の実施例にもとづいて説明する。第４図は
この発明方法を適用したレーザ硬化処理装置を示
し、１はレーザ発振器、２はそのレーザ発振器１
から発振されたレーザ光１ａを伝送する伝送ミラ
ー、３は伝送されたレーザ光１ａを集光する集光
光学系である。なお、３ａは集光光学系３に内蔵
された集光レンズである。一方、４はたとえば肉
厚が３mm以下といつた肉厚の薄い薄肉円筒、５は
その薄肉円筒４を保持する保持具である。保持具
５には図示はしないが保持した薄肉円筒４を周方
向沿いに回転ないし軸方向沿いに移動させるため
の駆動機構が連結されてる。そして、この保持具
５が上記集光光学系３の出射側に斜めに配され、
保持した薄肉円筒４の内周面にレーザ光１ａが当
たるようにしている。
The method of this invention will be explained below based on a first embodiment shown in FIGS. 4 to 9. FIG. 4 shows a laser hardening treatment apparatus to which the method of the present invention is applied, 1 is a laser oscillator, 2 is the laser oscillator 1
A transmission mirror 3 transmits the laser beam 1a oscillated from the mirror, and 3 is a condensing optical system that condenses the transmitted laser beam 1a. Note that 3a is a condensing lens built into the condensing optical system 3. On the other hand, 4 is a thin cylinder having a wall thickness of 3 mm or less, for example, and 5 is a holder for holding the thin cylinder 4. Although not shown in the drawings, the holder 5 is connected to a drive mechanism for rotating the thin cylinder 4 held therein along the circumferential direction or moving it along the axial direction. This holder 5 is arranged obliquely on the output side of the condensing optical system 3,
The laser beam 1a is made to strike the inner peripheral surface of the thin cylinder 4 held.
他方、６は放熱体である。放熱体６はアルミ、
銅など熱伝導のよい材料から円筒状に成形される
一方、その外周面に軸方向に沿う放熱フイン６ａ
を多数枚設けて構成される。そして、このように
構成された放熱体６は上記薄肉円筒４の外周面上
に、その外周面と密着するように外嵌することが
できるようになつている。なお、別途に高熱伝導
性の充填材として、たとえばアルミ、銅などの粉
末８…を水、グリースを使つてペースト状にした
ものが用意されていて、薄肉円筒４の外周面がた
とえば鋳物の鋳はだ面のように凹凸がある場合、
放熱体６の内周面と薄肉円筒４の外周面との両者
間に粉末８…のペーストを挿入して放熱体６と薄
肉円筒４とを密着させるようにしている。 On the other hand, 6 is a heat sink. The heat sink 6 is made of aluminum,
A heat dissipation fin 6a is formed from a material with good thermal conductivity such as copper into a cylindrical shape, and extends along the axial direction on the outer peripheral surface of the cylindrical shape.
It is composed of a large number of sheets. The heat sink 6 configured in this manner can be fitted onto the outer circumferential surface of the thin cylinder 4 so as to be in close contact with the outer circumferential surface. In addition, as a highly thermally conductive filler, for example, powder 8 of aluminum, copper, etc. is made into a paste using water and grease, and the outer circumferential surface of the thin-walled cylinder 4 is made of, for example, a cast material. If there is an uneven surface such as a bare surface,
A paste of powder 8 is inserted between the inner peripheral surface of the heat sink 6 and the outer peripheral surface of the thin cylinder 4 to bring the heat sink 6 and the thin cylinder 4 into close contact.
また、第４図において、９は薄肉円筒４に設け
た放熱体６に向つて空気、窒素ガス、液体窒素な
どの冷却媒体を吹きつけて放熱体６の冷却を助け
るためのノズルである。 Further, in FIG. 4, reference numeral 9 denotes a nozzle for blowing a cooling medium such as air, nitrogen gas, liquid nitrogen, etc. toward the heat sink 6 provided in the thin cylinder 4 to help cool the heat sink 6.
つぎにこのように構成されたレーザ硬化処理装
置を用いてこの発明方法を説明する。まず、薄肉
円筒４の外周面に放熱体６を外嵌する。これによ
り、放熱体６全体は薄肉円筒４の外周面に密着す
る状態で取付けられる。なお、この際、薄肉円筒
４の外周面に凹凸があつて密着しにくい場合に
は、第６図で示すように放熱体６の内周面と薄肉
円筒４の外周面との間にアルミ、銅などの粉末８
…をペースト状にしたものを介在させて粉末層に
て密着化を図る。その後、薄肉円筒４を第４図で
も示すように保持具５に保持させ、しかる後、レ
ーザ発振器１を作動させれば、レーザ発振器１か
ら出射されたレーザ光１ａの光束が伝送ミラー
２、集光レンズ３ａを通して薄肉円筒４の内周面
に照射される。そして、この際、薄肉円筒４を回
転駆動することでレーザ光１ａが第７図で示すよ
うに内周面おいてリング状に走査されてリング状
の加工が行われ、また、薄肉円筒４を軸方向に往
復駆動することでレーザ光１ａが第８図で示すよ
うに内周面おいて直線状に走査されて直線状の加
工が行われ、さらに先に述べた両者を組合わせる
ことでレーザ光１ａが第９図で示すように内周面
おいてスパイラル状に走査されてスパイラル状の
加工が行われる。ここで、このような斜めの入射
光を用いて焼入れするとき、薄肉円筒４の長さ／
内径の比を2.75にすれば片側のレーザ光１ａの入
射で薄肉円筒４の内周面全体を焼入れすることが
できるようになり、また薄肉円筒４の長さ／内径
の比を5.5すれば両側からのレーザ光１ａの入射
で薄肉円筒４の内周面全体を焼入れすることがで
きるようになる。 Next, the method of the present invention will be explained using the laser hardening processing apparatus configured as described above. First, the heat sink 6 is fitted onto the outer peripheral surface of the thin cylinder 4. As a result, the entire heat sink 6 is attached in close contact with the outer peripheral surface of the thin cylinder 4. At this time, if the outer circumferential surface of the thin cylinder 4 is uneven and it is difficult to make a close contact, as shown in FIG. Powder such as copper 8
... is interposed in paste form to achieve close contact with the powder layer. Thereafter, as shown in FIG. 4, the thin cylinder 4 is held by the holder 5, and then the laser oscillator 1 is activated. The light is irradiated onto the inner peripheral surface of the thin cylinder 4 through the optical lens 3a. At this time, by rotating the thin cylinder 4, the laser beam 1a is scanned in a ring shape on the inner peripheral surface as shown in FIG. By reciprocating in the axial direction, the laser beam 1a is scanned in a straight line on the inner circumferential surface as shown in FIG. As shown in FIG. 9, the light 1a is scanned in a spiral manner on the inner peripheral surface to perform spiral processing. Here, when hardening using such oblique incident light, the length of the thin cylinder 4 /
If the ratio of the inner diameter is set to 2.75, the entire inner peripheral surface of the thin-walled cylinder 4 can be hardened by the incidence of the laser beam 1a on one side, and if the ratio of the length/inner diameter of the thin-walled cylinder 4 is set to 5.5, both sides can be hardened. The entire inner peripheral surface of the thin-walled cylinder 4 can be hardened by the incidence of the laser beam 1a.
ここで、このようなレーザ光１ａによる硬化処
理に際し、従来、薄肉円筒４の肉厚が薄いことを
理由に充分に硬化させることができないことが指
摘されるが、この発明によるとこれを解消するこ
とができる。 Here, it has been pointed out that conventionally, when performing hardening treatment using the laser beam 1a, sufficient hardening cannot be achieved due to the thin wall thickness of the thin-walled cylinder 4, but this invention solves this problem. be able to.
すなわち、薄肉円筒４の外周面には、空気、窒
素ガス、液体窒素などの冷却媒体で冷却される放
熱体６が設けられている。しかるに、硬化処理の
良否を決める自己冷却としては、薄肉円筒４がも
つ自己冷却性能と放熱体６の自己冷却性能とを加
えた大なる自己冷却が得られることになる。故
に、内周面を充分にに速い速度で冷却することが
できるようになる。したがつて、薄肉円筒４の内
周面を充分に硬化させることができるのである。
そのうえ、自己冷却は放熱体６に触れる部分に均
一に働くので、薄肉円筒４の途中で、例えば焼入
れの度合いが異なるようなことなく、均一な硬化
を得ることができる。しかも、放熱体６によつ
て、薄肉円筒４が受ける熱を速やかに放熱するか
ら、薄肉円筒４の熱影響は少なくてすみ、熱影響
による変形を防止することができる利点がある。
もちろん、これらのことは先に述べたペースト状
物を使用したものについても同じであることはい
うまでもない。また、これはレーザ光１ａの光軸
ををNC制御で移動させるようにしたものでも同
様である。 That is, a heat radiator 6 is provided on the outer peripheral surface of the thin cylinder 4 and is cooled by a cooling medium such as air, nitrogen gas, or liquid nitrogen. However, as the self-cooling that determines the quality of the hardening process, a large amount of self-cooling is obtained by adding the self-cooling performance of the thin-walled cylinder 4 and the self-cooling performance of the heat sink 6. Therefore, the inner circumferential surface can be cooled at a sufficiently high rate. Therefore, the inner peripheral surface of the thin cylinder 4 can be sufficiently hardened.
Moreover, since the self-cooling acts uniformly on the portion that comes into contact with the heat sink 6, uniform hardening can be obtained without, for example, varying degrees of hardening in the middle of the thin-walled cylinder 4. Moreover, since the heat radiating body 6 quickly radiates the heat received by the thin cylinder 4, the effect of heat on the thin cylinder 4 is reduced, and there is an advantage that deformation due to the influence of heat can be prevented.
Needless to say, these matters also apply to those using the paste-like material described above. Further, this also applies to a device in which the optical axis of the laser beam 1a is moved by NC control.
なお、この発明は上述した第１の実施例に限定
されるものではなく、第１０図および第１１図に
示す第２の実施例、第１２図に示す第３の実施例
のようにしてもよい。 すなわち、第１０図およ
び第１１図に示すものは、周方向に放熱フイン６
ａ…を設けて円筒状の放熱体６を構成したもので
ある。なお、第１０図は放熱体６の外観を、第１
１図は放熱体６の断面をそれぞれ示す。 Note that the present invention is not limited to the first embodiment described above, and may be applied to the second embodiment shown in FIGS. 10 and 11, and the third embodiment shown in FIG. 12. good. That is, what is shown in FIGS. 10 and 11 has heat dissipation fins 6 in the circumferential direction.
A... is provided to constitute a cylindrical heat sink 6. Note that FIG. 10 shows the appearance of the heat sink 6.
1 each shows a cross section of the heat sink 6. As shown in FIG.
第１２図に示すものは、放熱体６の全体を中空
筒状に構成する一方、その中空筒状部６ｂのたと
えば端面に入口口体１０および出口口体１１を設
けたもので、各入口口体１０、出口口体１１を通
じて中空筒状部６ｂの内部に、水，あるいは液体
窒素などの冷却媒体を流通させることにより放熱
（冷却）させるようにしたものである。 The heat dissipating body 6 shown in FIG. 12 has a hollow cylindrical shape as a whole, and an inlet port 10 and an outlet port 11 are provided on the end face of the hollow cylindrical portion 6b. Heat is radiated (cooled) by flowing a cooling medium such as water or liquid nitrogen into the hollow cylindrical portion 6b through the body 10 and the outlet body 11.
なお、上述した実施例で説明したレーザ光の照
射の他、たとえばあやめ状にレーザ光を走査して
焼入れを行なうようにしても、またレーザ光をス
ポツトさせてスポツトパターンで焼入れを行なう
ようにしてもよい。 In addition to the laser beam irradiation explained in the above-mentioned embodiments, hardening may be performed by scanning the laser beam in an iris shape, or by spotting the laser beam and hardening in a spot pattern. Good too.
以上説明したようにこの発明によれば、放熱体
で薄肉円筒における自己冷却を促進することがで
きるようになり、薄肉円筒の内周面を充分に硬化
させることができる。そのうえ、自己放熱は放熱
体に伝熱する部分に均一に働くので、薄肉円筒の
途中で硬化の度合いが変わるようなことはなく、
薄肉円筒の内周面を均一に硬化させることができ
る。しかも、放熱体は自己冷却とさせるだけでな
く、薄肉円筒が受ける熱を速やかに放熱して、熱
影響による変形を防止することができる利点があ
る。
As explained above, according to the present invention, it becomes possible to promote self-cooling in the thin-walled cylinder with the heat sink, and the inner circumferential surface of the thin-walled cylinder can be sufficiently hardened. Furthermore, self-heat radiation works uniformly in the area where heat is transferred to the heat sink, so there is no change in the degree of hardening in the middle of the thin-walled cylinder.
The inner circumferential surface of a thin cylinder can be uniformly hardened. Furthermore, the heat radiator has the advantage of not only being able to self-cool, but also being able to rapidly radiate heat received by the thin-walled cylinder, thereby preventing deformation due to thermal effects.
第１図ないし第３図は異なる従来の硬化処理方
法を示す断面図、第４図ないし第９図はこの発明
の第１の実施例を示し、第４図はこの発明方法を
適用したレーザ硬化処理装置を示す構成図、第５
図は放熱体を示す斜視図、第６図は薄肉円筒の外
周面と放熱体の内周面との間に充填材を介在した
状態を示す断面図、第７図ないし第９図は異なる
レーザ光の走査状態を示す斜視図、第１０図およ
び第１１図はこの発明方法の第２の実施例の放熱
体を示す斜視図および断面図、第１２図はこの発
明方法の第３の実施例の放熱体を示す斜視図であ
る。
１……レーザ発振器、２……伝送ミラー、３ａ
……集光レンズ、４……薄肉円筒、６……放熱
体。
1 to 3 are cross-sectional views showing different conventional hardening treatment methods, FIGS. 4 to 9 show a first embodiment of the present invention, and FIG. 4 is a laser curing method to which the present invention is applied. Block diagram showing the processing device, No. 5
The figure is a perspective view showing a heat sink, FIG. 6 is a sectional view showing a state in which a filler is interposed between the outer peripheral surface of a thin cylinder and the inner peripheral surface of the heat sink, and FIGS. 7 to 9 are different laser beams. FIGS. 10 and 11 are perspective views showing the scanning state of light, FIGS. 10 and 11 are perspective views and cross-sectional views showing a heat sink of the second embodiment of the method of this invention, and FIG. 12 is a third embodiment of the method of this invention. FIG. 2 is a perspective view showing a heat sink. 1... Laser oscillator, 2... Transmission mirror, 3a
...Condensing lens, 4... Thin cylinder, 6... Heat sink.
Claims (1)
記薄肉円筒と密着するように外嵌し、しかる後、
上記薄肉円筒の内周面にレーザ光の光束を照射す
ることを特徴とする薄肉円筒の硬化処理方法。 ２ 放熱体は放熱フインを備えて構成され、この
放熱フインに冷却媒体を吹き付けることで冷却さ
れることを特徴とする特許請求の範囲第１項に記
載の薄肉円筒の硬化処理方法。 ３ 放熱体は全体が中空筒状に構成され、この内
部に冷却媒体を流通させることで冷却されること
を特徴とする特許請求の範囲第１項に記載の薄肉
円筒の硬化処理方法。[Claims] 1. Fitting the entire cylindrical heat dissipating body onto the outer peripheral surface of the thin-walled cylinder so as to make close contact with the thin-walled cylinder, and then,
A method for hardening a thin-walled cylinder, comprising irradiating the inner peripheral surface of the thin-walled cylinder with a beam of laser light. 2. The method for hardening a thin-walled cylinder according to claim 1, wherein the heat dissipating body is configured to include heat dissipating fins, and is cooled by spraying a cooling medium onto the heat dissipating fins. 3. The method for hardening a thin-walled cylinder according to claim 1, characterized in that the heat radiator has a hollow cylindrical shape as a whole, and is cooled by circulating a cooling medium inside the heat radiator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59106774A JPS60251222A (en) | 1984-05-26 | 1984-05-26 | Treatment for hardening thin-walled cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59106774A JPS60251222A (en) | 1984-05-26 | 1984-05-26 | Treatment for hardening thin-walled cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60251222A JPS60251222A (en) | 1985-12-11 |
| JPS649382B2 true JPS649382B2 (en) | 1989-02-17 |
Family
ID=14442247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59106774A Granted JPS60251222A (en) | 1984-05-26 | 1984-05-26 | Treatment for hardening thin-walled cylinder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60251222A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5196671A (en) * | 1990-08-17 | 1993-03-23 | Siemens Aktiengesellschaft | Device and process for the laser welding of a tube |
| DE4115562A1 (en) * | 1990-08-17 | 1992-02-20 | Siemens Ag | DEVICE AND METHOD FOR LASER WELDING A TUBE |
| 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 |
| US7162798B2 (en) * | 2004-02-26 | 2007-01-16 | Electro-Motive Diesel, Inc. | Ported engine cylinder liner with selectively laser-hardened and induction-hardened bore |
| KR101272917B1 (en) * | 2011-08-18 | 2013-06-11 | 현대자동차주식회사 | Jig for raser heat treatment |
| DE102014112968B4 (en) | 2014-09-09 | 2017-04-20 | Thyssenkrupp Ag | Method for hardening a hollow profile and hardening tool |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5976816A (en) * | 1982-10-27 | 1984-05-02 | Mitsubishi Heavy Ind Ltd | Surface hardening method |
-
1984
- 1984-05-26 JP JP59106774A patent/JPS60251222A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60251222A (en) | 1985-12-11 |
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