CN101722366A - Laser welding method for inner gear ring and annular baffle - Google Patents
Laser welding method for inner gear ring and annular baffle Download PDFInfo
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- CN101722366A CN101722366A CN 201010100400 CN201010100400A CN101722366A CN 101722366 A CN101722366 A CN 101722366A CN 201010100400 CN201010100400 CN 201010100400 CN 201010100400 A CN201010100400 A CN 201010100400A CN 101722366 A CN101722366 A CN 101722366A
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- inner gear
- gear ring
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Abstract
The invention discloses a laser welding method for an inner gear ring and an annular baffle, which belongs to the technical field of laser processing. In the prior art, an electron beam welding method is adopted for welding. As the electron beam welding method requires to be performed under a vacuum state, and a welding workpiece has a larger dimension, vacuum welding is hardly realized, a process is complicated, production efficiency is low and process cost is high. Although the problems of the electron beam welding method are absent in argon arc welding, the argon arc welding requires workpiece preheating, wire filling, post-welding and the like; the process is complicated; and weld penetration after welding is not as good as that of the electron beam welding method, the heat affected area is larger, weld joint quality is poor, and welding processing is not precise enough. The laser welding method is adopted for welding the inner gear ring and the annular baffle; and a laser nozzle aligns with and welds a weld joint which is formed by a contact surface between the inner gear ring and the annular baffle. The weld joint moves at a speed of v, and simultaneously the weld area is protected by a protective gas. The laser welding method for the inner gear ring and the annular baffle is applied to the manufacture of the split inner gear in a transmission system and a speed control system.
Description
Technical field
What the present invention relates to is the method for laser welding of a kind of ring gear and ring baffle, the welding work pieces precision size, complex-shaped, material is different, belongs to technical field of laser processing.
Background technology
Gear is the core part in transmission system and the speed change system.In order to make transmission system and speed change system weight saving, volume reduce, reduce the Gear Processing difficulty, save raw material, one of measure is with split type alternative Contiuum type.It is this that the processing of internal-gear just belongs to, and first split processing ring gear 1 and ring baffle 2 are seen Fig. 1, shown in Figure 2, and be again that the two is integrally welded, forms a compound internal-gear.Ring gear 1 material is 20Cr2Ni4A, 6 grades of design accuracies.20Cr2Ni4A is a kind of high duty alloy carburizing steel, and phosphorus content is low, and quenching degree is very high, has good toughness, wearability, and intensity is also very high; Ring baffle 2 is the 20g boiler steel, has certain intensity, and its plasticity, toughness, shaping and welding technological properties are all fine, and price is comparatively cheap.
Prior art adopts electro-beam welding method that the two is integrally welded.Electro-beam welding method has some advantages such as weld seam is narrow, the heat affected area is little, depth-to-width ratio is big, but, because this method must be carried out under vacuum state, and described internal-gear size is bigger, as reference diameter 400mm, is difficult to realize vacuum welding, operation is numerous and diverse, production efficiency is low, technology cost height, and electro-beam welding method is difficult to extensive use in this field.
Though there is not the problem of electro-beam welding method in argon arc welding,, argon arc welding requires pre-heated work pieces, also need fill silk, afterwards weld etc., operation is comparatively complicated, and the postwelding fusion penetration is not as good as electro-beam welding method, the heat affected area is bigger, and weldquality is relatively poor, and welding processing is accurate inadequately.
With respect to argon arc welding and electro-beam welding method, laser weld weldquality height, nonmetallic inclusion easily gasifies in the laser beam welding.Compare with argon arc welding, operation is simple.Compare with electron beam welding, lower to the cleaning requirement of workpiece, difficult generation is mingled with phenomenon, and the laser weld butt welded seam has the purification effect, and makes the weld grain refinement, does not produce X-radiation, can carry out in atmosphere.
Summary of the invention
The objective of the invention is to realize the laser accurate welding of dissimilar steel ring gear, ring baffle, the intensity at solder bond position is not less than the 20g hardness of steel.For this reason, we have invented the method for laser welding of a kind of ring gear and ring baffle.
Welding work pieces of the present invention is ring gear and ring baffle; it is characterized in that; see Fig. 3, shown in Figure 4; the two is the xenogenesis steel part for ring gear 1 and ring baffle 2; laser nozzle 3 is aimed at the slit welding that is formed by ring gear 1, ring baffle 2 the two contact-making surface; weld seam moves with speed v, simultaneously by protective gas protection welding region.
The laser weld heat affected area is little, obtain appearance of weld attractive in appearance and fine and close reliable, do not have effects such as welding crackle and bubble, operation are simple in, the welding depth-to-width ratio can reach more than 5, and the intensity at solder bond position is not less than the 20g hardness of steel, can replace existing welding method fully.
Description of drawings
Fig. 1 is the ring gear schematic diagram in prior art and the welding work pieces of the present invention.Fig. 2 is the ring baffle schematic diagram in prior art and the welding work pieces of the present invention.Fig. 3 is that the present invention's method for laser welding master looks schematic diagram, and this figure double as is a Figure of abstract.Fig. 4 is that schematic diagram is looked on the present invention's a method for laser welding left side.
The specific embodiment
Welding work pieces of the present invention is ring gear 1 and ring baffle 2, sees Fig. 3, shown in Figure 4, and ring gear 1 material is 20Cr2Ni4A, and ring baffle 2 materials are the 20g steel.Welding is CO with laser
2Laser, laser nozzle 3 are aimed at the slit that is formed by ring gear 1, ring baffle 2 the two contact-making surface and are welded, and weld seam moves with speed v, and speed v is the linear velocity of laser beam and welding work pieces contact position on the welding work pieces, and speed v is 1.2～2.1m/min.The laser beam defocusing amount is+2mm, laser power 3.5～5.0kW, and simultaneously by protective gas protection welding region, as 20～40%He+80～60%Ar, total flow 1～2m
3/ h.
Adopt CO
2When laser weld 20Cr2Ni4A steel and 20g steel, best light beam defocusing amount is+2mm that the weld penetration that obtain this moment is bigger.In addition, technical parameters such as speed of welding, laser beam defocusing amount, laser power, protective gas proportioning and flow influence the fusion penetration of laser weld, molten wide and weld contour, weld defect etc.The determined technical parameter according to the present invention, the depth-to-width ratio that is reached is greater than 5; Defectives such as weld seam pore-free, crackle.
Carry out tensile strength test on testing machine for mechanical properties, prove the method welding ring gear and the ring baffle that adopt the present invention, the intensity at solder bond position is not less than the 20g hardness of steel.
Adopt instruments such as metallographic microscope, SEM that the heterogeneous microstructure of laser weld binding site is analyzed, assert defectives such as weld seam pore-free, crackle.
Claims (2)
1. the method for laser welding of ring gear and ring baffle; welding work pieces is ring gear and ring baffle; it is characterized in that; the two is the xenogenesis steel part for ring gear (1) and ring baffle (2); laser nozzle (3) is aimed at the slit welding that is formed by ring gear (1), the two contact-making surface of ring baffle (2); weld seam moves with speed v, simultaneously by protective gas protection welding region.
2. method for laser welding according to claim 1 is characterized in that, ring gear (1) material is 20Cr2Ni4A, and ring baffle (2) material is the 20g steel; Speed v is the linear velocity of laser beam and welding work pieces contact position on the welding work pieces, and speed v is 1.2～2.1m/min; The laser beam defocusing amount is+2mm; Laser power 3.5～5.0kW; Simultaneously protect welding region, total flow 1～2m by protective gas 20～40%He+80～60%Ar
3/ h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010100400 CN101722366A (en) | 2010-01-25 | 2010-01-25 | Laser welding method for inner gear ring and annular baffle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010100400 CN101722366A (en) | 2010-01-25 | 2010-01-25 | Laser welding method for inner gear ring and annular baffle |
Publications (1)
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| CN101722366A true CN101722366A (en) | 2010-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010100400 Pending CN101722366A (en) | 2010-01-25 | 2010-01-25 | Laser welding method for inner gear ring and annular baffle |
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| CN (1) | CN101722366A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102091920A (en) * | 2010-12-28 | 2011-06-15 | 神龙汽车有限公司 | Method for machining powder metallurgy material gear ring and steel material gear body combined automobile transmission gear |
| CN102672354A (en) * | 2012-05-07 | 2012-09-19 | 天津大学 | Laser welding method of foamed aluminum green packaging material and application thereof |
| CN103801834A (en) * | 2012-11-12 | 2014-05-21 | 中国南方航空工业(集团)有限公司 | Laser repair-welding method for case and guider of small aero-engine |
| CN109398173A (en) * | 2018-12-10 | 2019-03-01 | 湖北航嘉麦格纳座椅系统有限公司 | The compound ratchet wheel of angle adjustor and angle adjustor, installation method |
| CN110293311A (en) * | 2019-05-30 | 2019-10-01 | 北京理工大学 | A kind of robot high accurate speed reducer duplex-gear process units and application method |
-
2010
- 2010-01-25 CN CN 201010100400 patent/CN101722366A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102091920A (en) * | 2010-12-28 | 2011-06-15 | 神龙汽车有限公司 | Method for machining powder metallurgy material gear ring and steel material gear body combined automobile transmission gear |
| CN102091920B (en) * | 2010-12-28 | 2012-11-28 | 神龙汽车有限公司 | Method for machining powder metallurgy material gear ring and steel material gear body combined automobile transmission gear |
| CN102672354A (en) * | 2012-05-07 | 2012-09-19 | 天津大学 | Laser welding method of foamed aluminum green packaging material and application thereof |
| CN103801834A (en) * | 2012-11-12 | 2014-05-21 | 中国南方航空工业(集团)有限公司 | Laser repair-welding method for case and guider of small aero-engine |
| CN109398173A (en) * | 2018-12-10 | 2019-03-01 | 湖北航嘉麦格纳座椅系统有限公司 | The compound ratchet wheel of angle adjustor and angle adjustor, installation method |
| CN109398173B (en) * | 2018-12-10 | 2024-01-26 | 湖北航嘉麦格纳座椅系统有限公司 | Angle adjuster and composite ratchet wheel and installation method thereof |
| CN110293311A (en) * | 2019-05-30 | 2019-10-01 | 北京理工大学 | A kind of robot high accurate speed reducer duplex-gear process units and application method |
| 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 |
| US11478867B2 (en) | 2019-05-30 | 2022-10-25 | Beijing Institute Of Technology | Machining device for duplex gear of high-precision reducer for robot, and use method thereof |
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Open date: 20100609 |