JPH0123236B2 - - Google Patents
Info
- Publication number
- JPH0123236B2 JPH0123236B2 JP55164687A JP16468780A JPH0123236B2 JP H0123236 B2 JPH0123236 B2 JP H0123236B2 JP 55164687 A JP55164687 A JP 55164687A JP 16468780 A JP16468780 A JP 16468780A JP H0123236 B2 JPH0123236 B2 JP H0123236B2
- Authority
- JP
- Japan
- Prior art keywords
- welding
- laser beam
- laser
- hole
- metals
- 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
- 238000003466 welding Methods 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 150000002739 metals Chemical class 0.000 claims description 5
- 230000001678 irradiating effect Effects 0.000 claims 1
- 239000000463 material Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000012768 molten material Substances 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 229910001316 Ag alloy Inorganic materials 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000004021 metal welding Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Landscapes
- Laser Beam Processing (AREA)
Description
【発明の詳細な説明】
この発明は主として銀、銅等比較的熱伝導率の
高い金属の重ね合わせ溶接を対象にしたレーザ溶
接方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a laser welding method mainly for lap welding of metals with relatively high thermal conductivity such as silver and copper.
熱伝導率の高い金属はレーザ光の照射を受けて
も、溶接部の外に拡散するエネルギの量が多く、
十分な強度をもつ溶接が行えなかつた。また、レ
ーザ光のエネルギ分布は中心部が高く、周辺部が
低い、いわゆるガウス分布となつているため、上
記金属の重ね合わせ溶接を一層困難にしていた。
従来では、第１図に示すように、重ね合わされる
被溶接部材１，２のうち、集光レンズ３を透過し
焦点外しされたレーザ光４のスポツト５照射を受
ける側、すなわち被溶接部材１に、このスポツト
５の径より小の穴６を穿設して行つているが、こ
のような溶接では、被溶接部材１の厚みが増すに
つれ、第２図に示すように、溶接部７に空洞８が
発生する率が多く、十分な溶接強度を得るに至つ
ていない。 Even when metals with high thermal conductivity are irradiated with laser light, a large amount of energy diffuses outside the welding area.
It was not possible to weld with sufficient strength. In addition, the energy distribution of the laser beam is high in the center and low in the periphery, which is a so-called Gaussian distribution, which makes overlapping welding of the above-mentioned metals even more difficult.
Conventionally, as shown in FIG. 1, of the overlapping workpieces 1 and 2, the side receiving the spot 5 of the laser beam 4 that has passed through the condenser lens 3 and been defocused, that is, the workpiece 1 In this welding process, a hole 6 smaller than the diameter of the spot 5 is drilled, but as the thickness of the welded member 1 increases, the welding part 7 becomes thicker, as shown in FIG. Cavities 8 frequently occur, and sufficient welding strength cannot be obtained.
この発明は上記の事情に鑑みてなされたもの
で、レーザによる重ね合わせ溶接方法において、
溶接欠陥が少なく、溶接に必要とするレーザ出力
が低レベルで可能なレーザ溶接方法を提供するも
のである。 This invention was made in view of the above circumstances, and in a laser lap welding method,
The object of the present invention is to provide a laser welding method that causes fewer welding defects and requires a low level of laser output for welding.
以下、実施例を示す図面に基づいてこの発明を
説明する。 EMBODIMENT OF THE INVENTION Hereinafter, this invention will be explained based on drawing which shows an Example.
第３図は電気部品材料の溶接例を示す第１の実
施例で１１は一方溶接部材である銀や銀合金など
からつくられている接点部材、１２はこの部材１
１に重ね合わされる他方の溶接部材であるばね材
で、主として銅または銅合金からなる。ばね材１
２には接点部材１１に向つて段階的に径小になる
穴１３が穿設されている。この実施例では上記の
穴１３は同心的になる径大部１４ａ中央部１４
ｂ、径小部１４ｃの三段階に形成され、したがつ
て、穴１３内部においては、二箇所の水平な段部
１５ａ，１５ｂが形成されている。穴１３の上方
にはレーザ発振器１６と、この発振器より出力さ
れたレーザ光１７′を集光する集光レンズ１８と
が配設されている。上記径小部１４ｃは集光レン
ズ１８を透過したレーザ光１７の高エネルギ部分
を通過する大きさに穿設されている。 FIG. 3 shows a first embodiment showing an example of welding electrical component materials. Reference numeral 11 indicates a contact member made of silver or silver alloy, which is a welding member, and 12 indicates this member 1.
The spring material is the other welding member superimposed on 1 and is mainly made of copper or copper alloy. Spring material 1
2 is bored with a hole 13 whose diameter gradually decreases toward the contact member 11. In this embodiment, the hole 13 is concentric with the large diameter portion 14a and the central portion 14.
b, and a small diameter portion 14c. Therefore, inside the hole 13, two horizontal step portions 15a and 15b are formed. A laser oscillator 16 and a condensing lens 18 for condensing laser light 17' output from the oscillator are disposed above the hole 13. The small diameter portion 14c is formed to a size that allows the high energy portion of the laser beam 17 transmitted through the condensing lens 18 to pass through.
上記の構成で、穴１３に向つて焦点外しのレー
ザ光１７が照射されると、第４図に示すように各
段部１５ａ，１５ｂのエツヂ部１９ａ，１９ｂが
溶け、径小部１４ｃ方向へ地すべり的に流れ出
す。 With the above configuration, when the out-of-focus laser beam 17 is irradiated toward the hole 13, the edge portions 19a and 19b of each step portion 15a and 15b melt and move toward the small diameter portion 14c, as shown in FIG. It flows out like a landslide.
ところで、接点部材１１において、レーザ光１
７照射を受ける部分は、上記エツヂ部１９ａ，１
９ｂに比べて溶融しにくい平面状態ではあるが、
レーザ光１７′のエネルギ密度の高い部分が径小
部１４ｃを通つて照射されるので、形状および高
い熱伝導性にもかかわらず、接点部材１１はほぼ
瞬時に溶融される。したがつて、上記地すべり的
に溶融したエツヂ部１９ａ，１９ｂの溶融物と、
接点部材１１の溶融物とが良好に融合し、第５図
に示すような空隙部のない溶接部２０が形成され
て、点部材１１とばね材１２とは高強度に溶接さ
れる。 By the way, in the contact member 11, the laser beam 1
7. The portions to be irradiated are the edge portions 19a, 1
Although it is in a flat state that is difficult to melt compared to 9b,
Since the high energy density portion of the laser beam 17' is irradiated through the small diameter portion 14c, the contact member 11 is melted almost instantly despite its shape and high thermal conductivity. Therefore, the molten material of the edge portions 19a and 19b that melted like a landslide,
The molten material of the contact member 11 is well fused to form a welded portion 20 without voids as shown in FIG. 5, and the point member 11 and the spring material 12 are welded with high strength.
以上のように、この発明は、重ね合わせ溶接に
おいて、レーザ光の照射の前方側になる部材の照
射部を比較的低エネルギでも溶融され易い角度の
ある階段状の形状にし、しかもレーザ光の照射の
後方側になる部材の照射部がレーザ光の高エネル
ギー分布になる部分の照射を受けるように構成し
たので、レーザ出力が比較的低レベルでも両部材
を良好に溶接することができた。また、溶接部は
低レベルの出力のため上記後方側に部材から熱放
散が低く押えられるので空隙、入熱過大に伴なう
変質等の欠陥の発生も防止され、溶接強度の信頼
性を向上することができた。 As described above, the present invention makes the irradiated part of the member on the front side of the laser beam irradiation in overlap welding an angular step-like shape that is easy to melt even with relatively low energy, and furthermore, the laser beam irradiation Since the irradiation part of the member on the rear side was configured to receive irradiation with a portion having a high energy distribution of laser light, both members could be successfully welded even with a relatively low level of laser output. In addition, since the welded part has a low level of output, heat dissipation from the component on the rear side is suppressed to a low level, which prevents the occurrence of defects such as voids and deterioration due to excessive heat input, improving the reliability of welding strength. We were able to.
第６図乃至第８図はこの発明の第２乃至び第４
の実施例を示すもので、レーザ光の照射の前方側
になる部材の被照射部を、第６図においては、傾
斜した段部２１をもつ穴２２に形成した例、第７
図においては一つの段部を２３をもつ穴２４に形
成した例、そして第８図においては上記各実施例
で示した穴形状でなく、溝２５形状とした例であ
る。上記第６図に示した第２の実施例では、段部
２１がテーパ穴状になつているが、これは段部が
特に水平である必要はなく、要はレーザ光の照射
を受けて溶融し易いエツジ部２２ａが形成されて
いればよく、このことを説明するために、段部２
１をやや跨張して示してある。また、第８図に示
した第４の実施例では、前方側になる部材を二つ
に分け、それぞれ端部に段部を形成して対向させ
るか、あるいは二つに分けず一つの部材の場合に
は長穴的に形成すればよい。なお、溶接に際して
はレーザ光と被溶接部材とを相対的に走査して行
われる。上記第６図乃至第８図に示した実施例に
おいても前記第１の実施例とほぼ同様な効果を奏
する。 Figures 6 to 8 are the second to fourth figures of this invention.
6 shows an example in which the irradiated part of the member on the front side of the laser beam irradiation is formed in a hole 22 having an inclined step 21;
The figure shows an example in which one step is formed into a hole 24 having a hole 23, and FIG. 8 shows an example in which a groove 25 is formed instead of the hole shape shown in each of the above embodiments. In the second embodiment shown in FIG. 6 above, the stepped portion 21 has a tapered hole shape, but this does not require that the stepped portion be particularly horizontal. It is only necessary to form an edge portion 22a that is easy to bend.
1 is shown slightly straddling it. In addition, in the fourth embodiment shown in FIG. 8, the front member is divided into two parts, each with a step formed at the end and facing each other; In some cases, it may be formed into a long hole. Note that welding is performed by scanning the laser beam and the member to be welded relative to each other. The embodiments shown in FIGS. 6 to 8 described above also provide substantially the same effects as the first embodiment.
なお、この発明は上記実施例に限定されず、段
部は二以上複数個形成してもよく、要旨を逸脱し
ない範囲で種々変形できる。 It should be noted that the present invention is not limited to the above-mentioned embodiments, and two or more step portions may be formed, and various modifications may be made without departing from the spirit of the invention.
第１図および第２図は従来の溶接方法を示す断
面図、第３図乃至第５図はこの発明の第１の実施
例を示す断面図、第６図および第７図はこの発明
の第２、第３の実施例を示す断面図、第８図は同
じくこの発明の第４の実施例を示す斜視図であ
る。
１１，１２……溶接部材、１３……穴、１５
ａ，１５ｂ……段部、１６……レーザ発振器、１
７′……レーザ光、１８……集光レンズ、２５…
…溝。
1 and 2 are sectional views showing a conventional welding method, FIGS. 3 to 5 are sectional views showing a first embodiment of the present invention, and FIGS. 6 and 7 are sectional views showing a conventional welding method. 2. FIG. 8 is a sectional view showing the third embodiment, and FIG. 8 is a perspective view showing the fourth embodiment of the present invention. 11, 12... Welding member, 13... Hole, 15
a, 15b...Step part, 16...Laser oscillator, 1
7'... Laser light, 18... Condensing lens, 25...
…groove.
Claims (1)
属にレーザ光を照射して行うレーザ溶接方法にお
いて、上記照射の前方側になる一方の金属のレー
ザ光照射部に少なくとも段部を一以上有する段付
の穴もしくは溝を形成し上記段部にレーザ光を照
射して溶接することを特徴とするレーザ溶接方
法。1. In a laser welding method in which metals with high thermal conductivity are stacked together and one of the metals is irradiated with a laser beam, the laser beam irradiation part of one of the metals on the front side of the irradiation has at least one or more stepped portions. A laser welding method characterized by forming a stepped hole or groove and welding by irradiating the stepped portion with a laser beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55164687A JPS5788992A (en) | 1980-11-25 | 1980-11-25 | Laser-welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55164687A JPS5788992A (en) | 1980-11-25 | 1980-11-25 | Laser-welding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5788992A JPS5788992A (en) | 1982-06-03 |
| JPH0123236B2 true JPH0123236B2 (en) | 1989-05-01 |
Family
ID=15797940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55164687A Granted JPS5788992A (en) | 1980-11-25 | 1980-11-25 | Laser-welding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5788992A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013144390A (en) * | 2012-01-13 | 2013-07-25 | Ricoh Co Ltd | Method for manufacturing liquid ejection head, liquid ejection head, and image forming apparatus |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR940011261B1 (en) * | 1991-12-28 | 1994-12-03 | 주식회사 금성사 | Laser welding method for c-crt electron gun |
| KR100604633B1 (en) * | 2004-04-26 | 2006-07-26 | 주식회사 성우하이텍 | A laser welding method for a aluminum tailor welded blank |
| JP4926765B2 (en) * | 2007-03-09 | 2012-05-09 | アスモ株式会社 | Metal joining method, commutator manufacturing method, and armature manufacturing method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS493862A (en) * | 1972-05-04 | 1974-01-14 |
-
1980
- 1980-11-25 JP JP55164687A patent/JPS5788992A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS493862A (en) * | 1972-05-04 | 1974-01-14 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013144390A (en) * | 2012-01-13 | 2013-07-25 | Ricoh Co Ltd | Method for manufacturing liquid ejection head, liquid ejection head, and image forming apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5788992A (en) | 1982-06-03 |
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