CN101368226B - Tooth ring tooth surface laser induration processing method - Google Patents
Tooth ring tooth surface laser induration processing method Download PDFInfo
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- CN101368226B CN101368226B CN2007100559735A CN200710055973A CN101368226B CN 101368226 B CN101368226 B CN 101368226B CN 2007100559735 A CN2007100559735 A CN 2007100559735A CN 200710055973 A CN200710055973 A CN 200710055973A CN 101368226 B CN101368226 B CN 101368226B
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Abstract
The invention relates to a laser hardening treatment method for a gear surface of a gear ring, which is characterized the in that: laser hardening treatment methods for the two side surfaces of each gear of the gear ring (1) and the top of the gear thereof are the same; the processing method thereof is described as follows: 1) the gear ring is arranged in the clamp of a rotary working platform; the direction of the length of the gear is vertical to the surface of the rotary working platform; 2) the upper end of the gear ring is provided with a light shielding ring; 3) the laser hardening treatment parameters, such as a laser power, a laser beam scanning speed, the focus of a focus lamp, are reasonably matched; 4) the center of a light guide cylinder deviates from the center of the gear ring; 5) the layer beam enters into the processing surface of the gear side of the gear ring; 6) a guide head moves up and down to match the periodic rotating of the rotary platform with small angle and scale division; or the light guide head moves up and down and rotates to form a laser hardening zone at the processing surface; 7) a primary switch is blocked by light to finish laser hardening treatment on all the gear surface of the gear ring (1). The rigidity and the wear-resistance when the two side gear surfaces of each gear of the gear ring are engaged with the gear surface of a planet gear are improved; simultaneously, as the self-owned characteristics of laser quenching, the quenching deformation of the gear ring is very small which completely meets the technical demands for design and production.
Description
Technical field:
The present invention relates to a kind of tooth ring tooth surface laser induration processing method, belong to the auto parts working method.
Background technology:
Gear ring is that product such as automobile slows down, the strength member in the speed change mechanism, as automotive wheels limit reduction axle gear ring, automotive transmission gear ring etc.Quality of fit in deceleration, the speed change mechanism between each component requires high, can not produce unbalance loading.Key part gear ring processing request precision height wherein, heat treatment deformation is little, has suitable intensity and high surface hardness.But gear ring belongs to large size, thin walled part, and processing and heat treated difficulty are bigger, and wherein distinct issues are exactly that heat treatment deformation is big, and are difficult to control, cause the gear ring dimension overproof, influence its quality product and use properties.
Summary of the invention:
The object of the present invention is to provide a kind of tooth ring tooth surface laser induration processing method, be with high-energy focussed laser beam rapid scanning workpiece, irradiated metal or alloy surface temperature and fast speed are elevated to more than the transformation temperature, when laser beam leaves illuminated position, because conduction of heat, the matrix that is in cold conditions makes its rapid cooling and carries out self-quench hardening, obtains more tiny hardened layer tissue, and it is little that it handles distortion; Strengthen the gear ring surface, solved the big difficult problem of the gear ring that conventional heat processing technique faced distortion.
Technical scheme of the present invention is achieved in that a kind of tooth ring tooth surface laser induration processing method, it is characterized in that: the laser hardening treatment process is identical near each tooth two sides of gear ring (1) and the tooth top thereof, its treatment process is as follows: 1. gear ring is placed on the rotary table jig, the tooth length direction is perpendicular to the rotary table table top; 2. gear ring (1) the upper ends circle that is in the light; 3. the rational Match laser power is that 400-4000W, laser beam flying speed are that 10-80mm/min, condensing lens focal length are that 200-800mm, defocusing amount absolute value＜80mm, protection gas can be laser hardening processing parameters such as argon gas and nitrogen; 4. light conducting cylinder misalignment gear ring (1) center; 5. laser beam is incident to gear ring (1) flank treat surface with 20 ° ~ 60 ° angles; 6. the leaded light head moves up and down, join with periodically Small angle calibration revolution of turn around table, or the leaded light head moves up and down and rotates, and forms the laser hardening band in treat surface; Its laser hardening band quantity Wei ≧ 2/tooth; Laser hardening strip length (L) is 20～150mm; Laser hardening bandwidth (W) is 2 ~ 12mm; It is to be 10% ~ 100% in the L scope that flank laser hardening band (2) surface-area accounts for the flank surface area ratio; Laser hardening band (2) dark (D) is 0.1 ~ 1.0mm; Near the crown tooth top place laser hardening band (2) width (W1) is＜3D/4; 7. light blocks switch No. one time, finishes the laser hardening of gear ring (1) institute geared surface and handles.
Positively effect of the present invention is when having improved each the tooth two lateral tooth flank pitch circle of gear ring and flank engagement such as near surface and sun and planet gear thereof, requirement has higher hardness and wear resistance, the gear ring flank of tooth is carried out part, selective laser hardening treatment, form the laser treatment hardenability band of certain hardening model, reach the purpose that improves surface hardness, owing to laser quenching self, the quenching strain of gear ring is very little simultaneously, satisfies design and manufacturing requirements fully; Ferrous materials laser quenching all has tangible hardening effect, and the material of gear ring mainly contains 45 steel and 42CrMo etc., and the surface hardness that its laser hardening is handled can reach more than the 672HV0.2 (58.5HRC), satisfies the requirement of gear ring hardening technique; Because gear ring is engagements such as the side surface of the certain-length of each tooth and width and sun and planet gear, therefore, the size of its laser treatment hardenability band and distribution thereof (laser treatment hardening model) are very important, simultaneously also need adopt the particular technology method, form the laser treatment hardenability band of required hardening model on the gear ring surface.
Description of drawings:
Fig. 1 gear ring surface laser quenching band synoptic diagram
Fig. 2 gear ring laser hardening layer cross sectional representation
Embodiment:
The present invention will be further described below in conjunction with drawings and Examples:
Embodiment 1:
As shown in Figure 1, 2, the laser hardening treatment process is identical near each tooth two sides of gear ring and the tooth top thereof, and its concrete treatment process is as follows: 1. gear ring is placed on the rotary table jig, the tooth length direction is perpendicular to the rotary table table top; 2. the gear ring upper ends circle that is in the light; 3. the rational Match laser power is that 800W, laser beam flying speed are that 30mm/min, condensing lens focal length are that 300mm, defocusing amount absolute value＜10mm, protection gas can be laser hardening processing parameters such as argon gas and nitrogen; 4. light conducting cylinder misalignment gear ring center; 5. laser beam is incident to gear ring flank treat surface with 40 ° of angles; 6. the leaded light head moves up and down, and that joins turns round with turn around table periodicity Small angle calibration, forms the laser hardening band in treat surface; Its laser hardening band quantity is 2/tooth; Laser hardening strip length (L) is 50mm; Laser hardening bandwidth (W) is 2mm; Flank laser hardening belt surface amasss and accounts for flank surface area ratio (in the L scope) is 10%; Laser hardening layer depth (D) is 0.2mm; Near the crown tooth top place laser hardening bandwidth (W1) is＜3D/4; 7. light blocks switch No. one time, finishes the laser hardening of gear ring institute geared surface and handles.
Embodiment 2:
As shown in Figure 1, 2, the laser hardening treatment process is identical near each tooth two sides of gear ring and the tooth top thereof, and its concrete treatment process is as follows: 1. gear ring is placed on the rotary table jig, the tooth length direction is perpendicular to the rotary table table top; 2. the gear ring upper ends circle that is in the light; 3. the rational Match laser power is that 1500W, laser beam flying speed are that 40mm/min, condensing lens focal length are that 500mm, defocusing amount absolute value＜20mm, protection gas can be laser hardening processing parameters such as argon gas and nitrogen; 4. light conducting cylinder misalignment gear ring center; 5. laser beam is incident to gear ring flank treat surface with 45; 6. the leaded light head moves up and down, and that joins turns round with turn around table periodicity Small angle calibration, forms the laser hardening band in treat surface; Its laser hardening band quantity is 2/tooth; Laser hardening strip length (L) is 80mm; Laser hardening bandwidth (W) is 4mm; Flank laser hardening belt surface amasss and accounts for flank surface area ratio (in the L scope) is 50%; Laser hardening layer depth (D) is 0.4mm; Near the crown tooth top place laser hardening bandwidth (W1) is＜3D/4; 7. light blocks switch No. one time, finishes the laser hardening of gear ring institute geared surface and handles.
Embodiment 3:
As shown in Figure 1, 2, the laser hardening treatment process is identical near each tooth two sides of gear ring and the tooth top thereof, and its concrete treatment process is as follows: 1. gear ring is placed on the rotary table jig, the tooth length direction is perpendicular to the rotary table table top; 2. the gear ring upper ends circle that is in the light; 3. the rational Match laser power is that 3000W, laser beam flying speed are that 60mm/min, condensing lens focal length are that 600mm, defocusing amount absolute value＜30mm, protection gas can be laser hardening processing parameters such as argon gas and nitrogen; 4. light conducting cylinder misalignment gear ring center; 5. laser beam is incident to gear ring flank treat surface with 50 ° of angles; 6. the leaded light head moves up and down, and that joins turns round with turn around table periodicity Small angle calibration, forms the laser hardening band in treat surface; Its laser hardening band quantity is 2/tooth; Laser hardening strip length (L) is 100mm; Laser hardening bandwidth (W) is 6mm; Flank laser hardening belt surface amasss and accounts for flank surface area ratio (in the L scope) is 90%; Laser hardening layer depth (D) is 0.6mm; Near the crown tooth top place laser hardening bandwidth (W1) is＜3D/4; 7. light blocks switch No. one time, finishes the laser hardening of gear ring institute geared surface and handles.
Claims (1)
1. tooth ring tooth surface laser induration processing method, it is characterized in that: the laser hardening treatment process is identical near each tooth two sides of gear ring (1) and the tooth top thereof, its treatment process is as follows: 1. gear ring is placed on the rotary table jig, the tooth length direction is perpendicular to the rotary table table top; 2. gear ring (1) the upper ends circle that is in the light; 3. the rational Match laser power is that 400-4000W, laser beam flying speed are that 10-80mm/min, condensing lens focal length are that 200-800mm, defocusing amount absolute value＜80mm, protection gas are argon gas or nitrogen; 4. light conducting cylinder misalignment gear ring (1) center; 5. laser beam is incident to gear ring (1) flank treat surface with 20 °～60 ° angles; 6. the leaded light head moves up and down, join with periodically Small angle calibration revolution of turn around table, or the leaded light head moves up and down and rotates, and forms the laser hardening band in treat surface; Its laser hardening band quantity is 〉=2/tooth; Laser hardening strip length L is 20～150mm; Flank laser hardening bandwidth W is 2～12mm; It is to be 10%～100% in the laser hardening strip length L scope that flank laser hardening band (2) surface-area accounts for the flank surface area ratio; The dark D of laser hardening band is 0.1～1.0mm; Near the crown the laser hardening bandwidth W1 of tooth top place is the dark D/4 of＜3 laser hardening bands; 7. light blocks switch No. one time, finishes the laser hardening of gear ring (1) institute geared surface and handles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100559735A CN101368226B (en) | 2007-08-17 | 2007-08-17 | Tooth ring tooth surface laser induration processing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007100559735A CN101368226B (en) | 2007-08-17 | 2007-08-17 | Tooth ring tooth surface laser induration processing method |
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| CN101368226A CN101368226A (en) | 2009-02-18 |
| CN101368226B true CN101368226B (en) | 2011-05-11 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101967551A (en) * | 2010-09-18 | 2011-02-09 | 中国兵器工业集团第七○研究所 | Laser strengthening device and strengthening method for valve seat ring of cylinder head |
| CN102649990A (en) * | 2012-05-05 | 2012-08-29 | 张家港市和昊激光科技有限公司 | Process for laser transformation hardening of shaft workpieces |
| CN102660668A (en) * | 2012-05-11 | 2012-09-12 | 中国第一汽车股份有限公司 | Laser quenching hardening method for tooth root of inner gear ring |
| CN102808077A (en) * | 2012-09-16 | 2012-12-05 | 江麓机电集团有限公司 | Thin-wall gear ring type part quenching method for keeping accuracy level |
| CN105331778B (en) * | 2015-11-10 | 2017-10-10 | 平高集团有限公司 | A kind of laser quenching processing method and quenching workpiece |
| CN108130402A (en) * | 2017-12-22 | 2018-06-08 | 大族激光科技产业集团股份有限公司 | A kind of laser-quenching method of rack |
| CN108411070A (en) * | 2018-04-19 | 2018-08-17 | 杭州盛镭激光科技有限公司 | The method that laser surface hardening based on gear forming method avoids tempering band |
| CN110695632A (en) * | 2019-10-10 | 2020-01-17 | 内蒙古第一机械集团股份有限公司 | Wear-resistant driving wheel gear ring and preparation method thereof |
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| CN1298786A (en) * | 2001-01-08 | 2001-06-13 | 广州市光通技术有限公司 | Laser treating method for parts with engaged surface and saw blade |
| CN1394969A (en) * | 2002-07-22 | 2003-02-05 | 广州富通光科技术有限公司 | Laser surface hardening process of gear |
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Patent Citations (2)
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| CN1298786A (en) * | 2001-01-08 | 2001-06-13 | 广州市光通技术有限公司 | Laser treating method for parts with engaged surface and saw blade |
| CN1394969A (en) * | 2002-07-22 | 2003-02-05 | 广州富通光科技术有限公司 | Laser surface hardening process of gear |
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| 杜劭峰等.齿圈激光表面相变硬化处理技术研究.《长春理工大学学报》.2004,第27卷(第3期),64-66，49. * |
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Owner name: CHINA FAW CO., LTD. Free format text: FORMER OWNER: CHINESE AUTO GROUP CO NO.1 Effective date: 20120106 |
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Effective date of registration: 20120106 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: 130011 Dongfeng Street, Jilin, Changchun, No. 2259 Patentee before: China FAW Group Corporation |