CN1281369C - Laser welding method for carburized gear wheel of automobile gearbox - Google Patents
Laser welding method for carburized gear wheel of automobile gearbox Download PDFInfo
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- CN1281369C CN1281369C CN 200410011034 CN200410011034A CN1281369C CN 1281369 C CN1281369 C CN 1281369C CN 200410011034 CN200410011034 CN 200410011034 CN 200410011034 A CN200410011034 A CN 200410011034A CN 1281369 C CN1281369 C CN 1281369C
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Abstract
The present invention relates to a laser welding method for a carburized gear of an automobile gearbox, which comprises the technical steps: machine processing, carburization preventing treatment, carburizing and quenching treatment, tempering treatment, machine processing and gear grinding treatment, and finally, laser welding treatment. The present invention has the advantages of simple technology, flexible weld, manufacturing technology simplification and productivity and product precision increase.
Description
Technical field:
The present invention relates to method for laser welding after the automobile gearbox gear carburizing, belong to the laser weld field.
Background technology:
Automobile gearbox gear adopts the carburizing and quenching surface intensified technique mostly, and the laser weld of automobile gearbox gear all is to carry out before carburizing at present; Along with the develop rapidly of auto industry, high-quality gearbox gear just progressively adopts gear-grinding process, so that the accuracy of gear improves, reduces running noise.But the roll flute operation needs to carry out behind carburizing and quenching, and limits because of structure behind the gear assembly carburizing and quenching of welding, and roll flute can't carry out.Similarly welding procedure also has electron beam welding etc.But electron beam welding needs to carry out under vacuum condition, and produces X ray, and the flexibility of its welding is not as laser weld.
Summary of the invention:
The object of the present invention is to provide method for laser welding after a kind of automobile gearbox gear carburizing, it can satisfy the connection request behind the gear grinding, and welding simplified manufacturing process flexibly, and productivity ratio and product precision are improved.
Technical scheme of the present invention is achieved in that method for laser welding after the automobile gearbox gear carburizing, and its procedure of processing is as follows:
(1) the carburizing processing is prevented on the weld seam position and near the surface thereof of welding such as gear, cone, soldered tooth, so that this position of each parts does not have carburized layer behind gear wheel carburization; Before the geared parts carburizing, adopt brushing method or automatic spraying process masking paste to be placed the weld seam position and near the surface thereof of intending laser weld, masking paste can adopt marketed coating, and the presetting range of masking paste is: every welding upper surface coating area is promptly counted width w from the weld seam center line and is: 2mm≤w≤6mm; The surface is sewed in the self-brazing of every welding end surface coating area, and to count width be 4mm≤h≤8mm; After carburizing and quenching, tempering, shot-peening and corresponding machined, the geared parts that need are welded is fitted in together, prepares to carry out laser weld.
(2) with the gear clamping on the positioning fixture of NC rotary table that can incline, gear is rotated on request, to realize different speeds of welding in laser beam welding.
(3) laser beam after adopting the light-conducting system of reflective focusing structure to focus on transfers to gear welded seam district center, make laser beam focusing focus defocusing amount :-2mm～+ 2mm.
(4) in the laser beam welding, laser instrument output laser power 1KW～6KW; Speed of welding 0.5～5.5m/min;
(5) adopt in nitrogen, argon gas or the helium gas such as one or more gases and compressed air in welding process, welding pool and optical element to be protected gas flow 5～15L/min in the welding process.
Good effect of the present invention is that technology is simple, and welding flexibly; Simplified manufacturing process, productivity ratio and product precision are improved.
The specific embodiment:
The present invention will be further described below in conjunction with embodiment:
Embodiment 1:
CAS5-20 gearbox one fast gear and cone assembly are carried out welding processing, and its step is prevented the carburizing processing for (1) to the surface of gear welding, so that this position does not have carburized layer behind gear wheel carburization; Before the geared parts carburizing, adopt brushing method or automatic spraying process that masking paste is placed and intend the laser weld surface, it is 2mm that every welding upper surface coating area is counted width w from the weld seam center line; The surface is sewed in the self-brazing of every welding end surface coating area, and to count width be 4mm; After carburizing and quenching, tempering, shot-peening etc. were handled, the geared parts that need are welded was fitted in together, prepared to carry out laser weld.
(2) with the gear clamping on the positioning fixture of NC rotary table that can incline, gear is rotated on request, to realize different speeds of welding in laser beam welding.
(3) laser beam after the light-conducting system of the reflective focusing structure of employing will focus on transfers to gear welded seam district center, makes laser beam focus on the focus defocusing amount to be-2mm.
(4) in the laser beam welding, laser instrument output laser power 1KW; Speed of welding 2m/min;
(5) adopt in nitrogen, argon gas or the helium gas such as a kind of and compressed air in welding process, welding pool and optical element to be protected gas flow 10min in the welding process.
Embodiment 2:
CAS5-20 gearbox one fast gear and cone assembly are carried out welding processing, and its step is prevented the carburizing processing for (1) to the surface of gear welding, so that this position does not have carburized layer behind gear wheel carburization; Before the geared parts carburizing, adopt brushing method or automatically spraying process masking paste placed intend the laser weld surface, it is that the self-brazing of every welding end surface coating area of 4mm is sewed on the surface to count width be 6mm that every welding upper surface coating area is counted width w from the weld seam center line; After carburizing and quenching, tempering, shot-peening etc. were handled, the geared parts that need are welded was fitted in together, prepared to carry out laser weld.
(2) with the gear clamping on the positioning fixture of NC rotary table that can incline, gear is rotated on request, to realize different speeds of welding in laser beam welding.
(3) laser beam after the light-conducting system of the reflective focusing structure of employing will focus on transfers to gear welded seam district center, and making laser beam focus on the focus defocusing amount is 1mm.
(4) in the laser beam welding, laser instrument output laser power 1KW; Speed of welding 0.5m/min;
(5) adopt in nitrogen, argon gas or the helium gas such as several and compressed air in welding process, welding pool and optical element to be protected gas flow 5min in the welding process.
Embodiment 3:
CAS5-20 gearbox one fast gear and cone assembly are carried out welding processing, and its step is prevented the carburizing processing for (1) to the surface of gear welding, so that this position does not have carburized layer behind gear wheel carburization; Before the geared parts carburizing, adopt brushing method or automatic spraying process that masking paste is placed and intend the laser weld surface, it is 6mm that every welding upper surface coating area is counted width w from the weld seam center line; The surface is sewed in the self-brazing of every welding end surface coating area, and to count width be 8mm; After carburizing and quenching, tempering, shot-peening etc. were handled, the geared parts that need are welded was fitted in together, prepared to carry out laser weld.
(2) with the gear clamping on the positioning fixture of NC rotary table that can incline, gear is rotated on request, to realize different speeds of welding in laser beam welding.
(3) laser beam after the light-conducting system of the reflective focusing structure of employing will focus on transfers to gear welded seam district center, and making laser beam focus on the focus defocusing amount is 2mm.
(4) in the laser beam welding, laser instrument output laser power 6KW; Speed of welding 1.5m/min;
(5) adopt in nitrogen, argon gas or the helium gas such as a kind of and compressed air in welding process, welding pool and optical element to be protected gas flow 15min in the welding process.
Embodiment 4:
CAS5-25 gearbox two-speed gear and cone assembly carry out welding processing, and its step is prevented the carburizing processing for (1) to the surface of gear and cone welding, so that this position carbon content after gear and cone carburizing is relatively low; Before gear and the cone part carburizing, adopt brushing method or automatic spraying process that masking paste is placed and intend the laser weld surface, it is 4mm that every welding upper surface coating area is counted width w from the weld seam center line; The surface is sewed in the self-brazing of every welding end surface coating area, and to count width be 7mm; After carburizing and quenching, tempering, shot-peening etc. are handled; The gear of need welding is fitted in cone part, prepares to carry out laser weld.
(2) with gear and cone clamping on the positioning fixture of NC rotary table that can incline, gear is rotated on request, to realize different speeds of welding in laser beam welding.
(3) laser beam after the light-conducting system of the reflective focusing structure of employing will focus on transfers to gear and cone welded seam district center, makes laser beam focus on focus defocusing amount: 2mm.
(4) in the laser beam welding, laser instrument output laser power 1KW～6KW; Speed of welding 4.5m/min;
(5) adopt gases such as several gases in nitrogen, argon gas or the helium and compressed air in welding process, welding pool and optical element to be protected gas flow 10L/min in the welding process.
Claims (1)
1, method for laser welding after a kind of automobile gearbox gear carburizing, it is characterized in that: procedure of processing is as follows: (1) prevents the carburizing processing to the surface of gear welding, so that this position carbon content behind gear wheel carburization is relatively low; Before the geared parts carburizing, adopt brushing method or automatic spraying process that masking paste is placed and intend the laser weld surface, it is 2mm≤w≤6mm that every welding upper surface coating area is counted width w from the weld seam center line; The surface is sewed in the self-brazing of every welding end surface coating area, and to count width h be 4mm≤h≤8mm; After carburizing and quenching, tempering, shot-peening etc. are handled; The geared parts of need welding is fitted in together, prepares to carry out laser weld;
(2) with the gear clamping on the positioning fixture of NC rotary table that can incline, gear is rotated on request, to realize different speeds of welding in laser beam welding;
(3) laser beam after the light-conducting system of the reflective focusing structure of employing will focus on transfers to gear welded seam district center, makes laser beam focus on the focus defocusing amount to be :-2mm～+ 2mm
(4) in the laser beam welding, laser instrument output laser power 1KW～6KW; Speed of welding 0.5～5.5m/min;
(5) adopt gases such as one or more gases in nitrogen, argon gas or the helium and compressed air in welding process, welding pool and optical element to be protected gas flow 5～15L/min in the welding process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410011034 CN1281369C (en) | 2004-08-13 | 2004-08-13 | Laser welding method for carburized gear wheel of automobile gearbox |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410011034 CN1281369C (en) | 2004-08-13 | 2004-08-13 | Laser welding method for carburized gear wheel of automobile gearbox |
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| CN1597231A CN1597231A (en) | 2005-03-23 |
| CN1281369C true CN1281369C (en) | 2006-10-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100480374C (en) * | 2001-09-28 | 2009-04-22 | 中国科学院上海生命科学研究院 | Process for preparing recombination human glicentin-1(7-37) |
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| CN102029469B (en) * | 2009-09-28 | 2015-05-13 | 中国第一汽车集团公司 | Gear ring processing method |
| RU2570594C2 (en) * | 2010-07-02 | 2015-12-10 | Актиеболагет Скф | Production of bearing racer, bearing racer and bearing |
| CN101885112B (en) * | 2010-07-09 | 2016-01-06 | 中国第一汽车集团公司 | Automobile drive axle differential housing with from mantle tooth laser welding connection method |
| CN102478041B (en) * | 2010-11-23 | 2013-09-25 | 沈阳黎明航空发动机(集团)有限责任公司 | Engine fastener welded by lasers and preparation method thereof |
| CN102476241B (en) * | 2010-11-24 | 2014-03-26 | 上海汽车变速器有限公司 | After-heating laser welding method for jointed gear ring and gear |
| CN102248377A (en) * | 2011-06-30 | 2011-11-23 | 重庆市蓝黛实业有限公司 | Welding process posterior to heat treatment of automobile transmission gear |
| CN102658426B (en) * | 2012-05-11 | 2016-01-20 | 中国第一汽车股份有限公司 | Driver flexible disk assembly method for laser welding between engine and gearbox |
| CN104862711A (en) * | 2015-04-29 | 2015-08-26 | 柳州玲通科技有限责任公司 | Surface treatment technology of hub bearing of agricultural sprinkler |
| CN105149784B (en) * | 2015-10-28 | 2017-08-04 | 无锡汉神电气股份有限公司 | Gearbox gear components laser welded technique |
| CN110052709B (en) * | 2019-04-23 | 2021-05-11 | 中国第一汽车股份有限公司 | Method for connecting rotor bracket of clutch coupling type motor with output shaft |
| CN110293311B (en) * | 2019-05-30 | 2020-06-02 | 北京理工大学 | High-precision speed reducer duplex gear production device for robot and use method |
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| CN113275752A (en) * | 2021-05-06 | 2021-08-20 | 中国第一汽车股份有限公司 | Composite connection method for automobile clutch outer shell assembly |
| CN115255842A (en) * | 2022-06-23 | 2022-11-01 | 中国第一汽车股份有限公司 | Processing method of transmission gear and transmission gear |
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- 2004-08-13 CN CN 200410011034 patent/CN1281369C/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100480374C (en) * | 2001-09-28 | 2009-04-22 | 中国科学院上海生命科学研究院 | Process for preparing recombination human glicentin-1(7-37) |
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| CN1597231A (en) | 2005-03-23 |
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Owner name: CHINA FAW CO., LTD. Free format text: FORMER OWNER: CHINESE AUTO GROUP CO NO.1 Effective date: 20111116 |
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Effective date of registration: 20111116 Address after: 130011 Changchun Province, West New Economic and Technological Development Zone, Dongfeng Street, No. 2259, No. Patentee after: China FAW Group Corporation Address before: Dongfeng Street Lvyuan District of Jilin province 130011 Changchun No. 83 Patentee before: China FAW Group Corporation |