CN102941437A - Manufacturing method of locomotive gearbox - Google Patents
Manufacturing method of locomotive gearbox Download PDFInfo
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- CN102941437A CN102941437A CN201210332983XA CN201210332983A CN102941437A CN 102941437 A CN102941437 A CN 102941437A CN 201210332983X A CN201210332983X A CN 201210332983XA CN 201210332983 A CN201210332983 A CN 201210332983A CN 102941437 A CN102941437 A CN 102941437A
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- lower tooth
- tooth roller
- box
- roller box
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Abstract
The invention discloses a manufacturing method of a locomotive gear. The gearbox comprises an upper gearbox and a lower gearbox. The upper gearbox and the lower gearbox are connected through bolts. The manufacturing method comprises the following steps: 1, forging and molding; 2, normalizing for the first time; 3, normalizing for the second time; 4, rough machining; 5, finish machining; 6, deburring and washing; 7, carburizing and quenching; 8, high temperature tempering; 9, deburring and washing for the second time; and 10, inspecting, wherein the upper gearbox is manufactured by the method as the manufacturing method of the lower gearbox. The carburizing steel can be any one of 20CrMnTi, 20CrMnMo, 15CrNi6, 17Cr2Ni2A, 20CrNi2MoA, 17CrNiMo6 and 17Cr2Ni2MoA, or one of 42CrMoA and 34Cr2Ni2MoA.
Description
Technical field
The present invention relates to a kind of manufacture method of gear-box, particularly relate to the manufacture method that a kind of locomotive is used gear-box.
Background technology
It is a kind of type of belt drive that is most widely used that gear rotates, and compares with other transmission, and the power with transmission is large, velocity interval is wide, efficient is high, reliable operation, life-span length, compact conformation, can guarantee constant ratio.Gear-box is an important mechanical part in the locomotive, and as the parts of transferring power, its main function is that the power that will produce transmits.At present, no matter be the gear-box that electric locomotive or diesel locomotive nearly all adopt welded-steel plate construction at home.But existing gear-box has shorter weakness of life-span, has restricted the safe operation of whole locomotive, need to be improved.Lost efficacy for gear-box, mainly contained the reason of following several respects:
(1) the tired spot corrosion of the flank of tooth of gear-box: during working gear, when Contact Stress of Gear surpasses the contact fatigue strength limit of material, the top layer of the flank of tooth can produce trickle fatigue crack, thereby cause many particulates to split away off from working surface, many meniscate shallow holes appear on the surface, this makes the gear cisco unity malfunction and lost efficacy, and causes the tired spot corrosion of the flank of tooth.Flank of tooth pitting corrosion resistant performance is main relevant with tooth face hardness, and tooth face hardness is higher, and pitting corrosion resistant performance is stronger.(2) breaking off gear teeth: when bending stress surpasses bending fatigue limit, after gear repeated stand under load, the tooth root place will produce fatigue crack, and gradually expansion, caused breaking off gear teeth.(3) tooth surface abrasion: under load, the flank of tooth can produce wearing and tearing, and backlash is increased, and thickness at root of tooth reduces, and impacts and noise thereby produce.Tooth surface abrasion is its inevitable failure mode.(4) tooth face agglutination: the gear of high-speed overload rotates, and the temperature when the region of engagement raises, and can destroy the effect of lubricating oil, makes it to lubricate well and causes the flank of tooth to be bonded together.(5) flank of tooth plastic deformation: under local function, when tooth face hardness is inadequate, can produce certain plastic deformation.
In addition, because China is with a vast territory, locomotive usually need to be in the very large different geographical work of the temperature difference.Therefore, installing locomotive gear cases also should have the characteristic such as cold-check resistance under the low-temperature condition; The gear-box smooth working be should guarantee, vibration and impact prevented; Guarantee sufficient lubricating condition, etc.
Because installing locomotive gear cases bears dynamic and static load simultaneously at run duration.For satisfying reliability and life expectancy, its body structure adopts the up and down assembling mode of box-type.But the gear-box of this assembling mode still has weak point, namely goes up the structure of lower box because the strength of materials is inadequate, thereby causes the inefficacy of installing locomotive gear cases.
Summary of the invention
The object of the invention is to overcome above-mentioned weak point, employing carburizing steel is material, and makes gear-box by process meanses such as roughing, fining-off and twice quenchings, thereby improves security and the service life that is used for installing locomotive gear cases.
The manufacture method of installing locomotive gear cases disclosed by the invention comprises the steps:
This gear-box comprises upper gear box and lower tooth roller box, and described upper gear box is connected by bolt with the lower tooth roller box; The manufacture method of described lower tooth roller box all may further comprise the steps:
1. forging molding: employing carburizing steel is material, in electric furnace described carburizing steel is forged upper gear box;
2. for the first time normalizing: under the temperature between 840 to 870 degrees centigrade the lower tooth roller box is carried out normalized treatment, the normalized treatment time is 1 to 2 hour;
3. for the second time normalizing: the lower tooth roller box of normalized treatment carries out the normalized treatment second time to finishing for the first time under the temperature between 810 to 830 degrees centigrade, and the time is 1 hour;
4. roughing: adopt roughing milling cutter that described lower tooth roller box is carried out roughing;
5. fine finishining: after roughing, adopt milling cutter that described lower tooth roller box is carried out fine finishining, make the roughness of the lower tooth roller box after the processing be: Ra=3 μ m, flatness is: 0.05mm;
6. deburring is cleaned: the lower tooth roller box after the fine finishining is carried out deburring clean;
7. carburizing and quenching: under the temperature between 850 to 890 degrees centigrade gear-box being carried out the Quenching Treatment cool time is 40 minutes, and quenching medium is water or oil;
8. high tempering: under 200 to 230 degrees centigrade temperature the lower tooth roller box that quenches complete is carried out temper, tempering time is for being 1 to 1.5 hour;
9. for the second time deburring is cleaned: adopt small tool to finishing the lower tooth roller box deburring of high tempering, then clean;
10: check: whether the lower tooth roller box to completion of processing is tested, to check this lower tooth roller box qualified;
Wherein, adopt the method the same with the manufacture method of described lower tooth roller box to make upper gear box.
Wherein, the material of described carburizing steel is: one of 20CrMnTi, 20CrMnMo, 15CrNi6,17Cr2Ni2A, 20CrNi 2MoA, 17CrNiMo6 or 17Cr2Ni2MoA.
Perhaps, the material of wherein said carburizing steel is: one of 42CrMoA or 34Cr2Ni2MoA.
Wherein, adopt numerically controlled lathe to carry out the roughing of described step 4 and the fine finishining of described step 5, described numerically controlled lathe is preferably five numerically controlled lathes of planer-type.
Description of drawings
Fig. 1 is the flow chart that the present invention makes gear-box;
The specific embodiment
The below introduces preferred embodiment of the present invention;
Embodiment 1:
The present invention sees also Fig. 1 for the manufacture of the method for gear-box, and wherein step S101 is the manufacturing process of lower tooth roller box to step S110, and step S201 is the manufacturing process of upper gear box to step S210;
As shown in Figure 1, in step 101, the lower tooth roller box is carried out forging molding: employing carburizing steel is material, in electric furnace described carburizing steel is forged upper gear box; In the present invention, the carburizing of the prior art steel capital can be used for making gear-box of the present invention, the present invention does not do special restriction to this, what carburizing steel was selected in the present embodiment is: one of 20CrMnTi, 20CrMnMo, 15CrNi6,17Cr2Ni2A, 20CrNi2MoA, 17CrNiMo6 or 17Cr2Ni2MoA are any;
Step S102 is for the first time normalizing: under 850 degrees centigrade temperature the lower tooth roller box is carried out normalized treatment, the normalized treatment time is 1 hour 40 minutes;
Step S103 is for the second time normalizing: the lower tooth roller box of normalized treatment carries out the normalized treatment second time to finishing for the first time under 815 degrees centigrade temperature, and the time is 1 hour; Wherein above-mentioned normalizing can be carried out in electric furnace.
Step S104 is roughing: adopt roughing milling cutter that described lower tooth roller box is carried out roughing; This processing preferentially selects Digit Control Machine Tool to carry out Milling Process: rough machined faying face adopts roughing milling cutter, and cutting speed is: 100-120m/min, cutting depth 1-3mm;
Step S105 is fine finishining: after roughing, adopt milling cutter that described lower tooth roller box is carried out fine finishining, the same preferential numerically controlled lathe that adopts of fine finishining carries out, and by milling cutter the lower tooth roller box is carried out Milling Process, cutting speed is: 145-155m/min, cutting depth 0.1-0.3mm; Adopt DRY CUTTING, make the roughness of the lower tooth roller box after the processing be: Ra=3 μ m, flatness is: 0.05mm;
Step S106 is that deburring is cleaned: the lower tooth roller box after the fine finishining is carried out deburring clean;
Step S107 is carburizing and quenching: under the temperature between 850 to 890 degrees centigrade gear-box being carried out the Quenching Treatment cool time is 40 minutes, and quenching medium is water or oil;
Step S108 is high tempering: under 200 to 230 degrees centigrade temperature the lower tooth roller box that quenches complete is carried out temper, tempering time is for being 1 to 1.5 hour;
Step S109 cleans for for the second time deburring: adopt small tool to finishing the lower tooth roller box deburring of high tempering, then clean;
Step S110 is check: whether the lower tooth roller box to completion of processing is tested, to check this lower tooth roller box qualified;
When making the lower tooth roller box, adopt the method the same with the manufacture method of lower tooth roller box to make upper gear box, namely such as the step S201 of Fig. 1 to step S210;
After this, upper gear box and lower tooth roller box are assembled together to finish the manufacturing of gear-box.
Embodiment 2:
The same with the manufacturing process of embodiment 1, equally with reference to Fig. 1, in embodiment 2, step S101 is the manufacturing process of lower tooth roller box to step S110, and step S201 is the manufacturing process of upper gear box to step S210; As different from Example 1, the Fabrication parameter that embodiment 2 adopts is different from embodiment 1, and the below introduces embodiment 2 in detail:
In step 101, the lower tooth roller box is carried out forging molding: employing carburizing steel is material, in electric furnace described carburizing steel is forged upper gear box; In the present invention, the carburizing of the prior art steel capital can be used for making gear-box of the present invention, different from 20CrMnTi, 20CrMnMo, 15CrNi6,17Cr2Ni2A, 20CrNi2MoA, 17CrNiMo6 or 17Cr2Ni2MoA carburizing steel that embodiment 1 adopts, in the present embodiment, in order further to improve the hardness on gear-box surface, the preferential carburizing steel that adopts of the present embodiment is: one of 42CrMoA or 34Cr2Ni2MoA;
Step S102 is for the first time normalizing: under 870 degrees centigrade temperature the lower tooth roller box is carried out normalized treatment, the normalized treatment time is 2 hours;
Step S103 is for the second time normalizing: the lower tooth roller box of normalized treatment carries out the normalized treatment second time to finishing for the first time under 830 degrees centigrade temperature, and the time is 1 hour; Wherein above-mentioned normalizing can be carried out in electric furnace.
Step S104 is roughing: adopt roughing milling cutter that described lower tooth roller box is carried out roughing; This processing preferentially selects Digit Control Machine Tool to carry out Milling Process, for example adopts five numerically controlled lathes of planer-type to process, and rough machined faying face adopts roughing milling cutter, and cutting speed is: 100m/min, cutting depth 2-3mm;
Step S105 is fine finishining: after roughing, adopt milling cutter that described lower tooth roller box is carried out fine finishining, the same preferential numerically controlled lathe that adopts of fine finishining carries out, five numerically controlled lathes of planer-type for example, by milling cutter the lower tooth roller box is carried out Milling Process, cutting speed is: 130-140m/min, cutting depth 0.1-0.2mm; Adopt DRY CUTTING, make the roughness of the lower tooth roller box after the processing be: Ra=2 μ m, flatness is: 0.05mm;
Step S106 is that deburring is cleaned: the lower tooth roller box after the fine finishining is carried out deburring clean;
Step S107 is carburizing and quenching: under the temperature between 860 to 880 degrees centigrade gear-box being carried out the Quenching Treatment cool time is 1 hour, and quenching medium is water or oil;
Step S108 is high tempering: under 200 to 230 degrees centigrade temperature the lower tooth roller box that quenches complete is carried out temper, tempering time is for being 1.5 hours;
Step S109 cleans for for the second time deburring: adopt small tool to finishing the lower tooth roller box deburring of high tempering, then clean;
Step S110 is check: whether the lower tooth roller box to completion of processing is tested, to check this lower tooth roller box qualified;
When making the lower tooth roller box, adopt the method the same with the manufacture method of lower tooth roller box to make upper gear box, namely such as the step S201 of Fig. 1 to step S210;
After this, upper gear box and lower tooth roller box are assembled together to finish the manufacturing of gear-box, the assembling of gear-box for example can adopt bolt to connect up and down.
The gear-box that adopts manufacture method of the present invention to make can obtain good intensity, for the locomotive environment for use, it not only can improve the service life of gear-box, and in the course of the work, owing to having improved intensity and the toughness of gear-box, so its work stability and safety more.
Detailed description of the present invention the manufacture process of locomotive with gear-box; but above-described embodiment is not for the restriction to protection domain of the present invention; those skilled in the art are not in the situation that break away from protection domain of the present invention; can make various modifications to the present invention, protection scope of the present invention is limited to the appended claims.
Claims (4)
1. the manufacture method of an installing locomotive gear cases, it is characterized in that: this gear-box comprises upper gear box and lower tooth roller box, described upper gear box is connected by bolt with the lower tooth roller box; The manufacture method of described lower tooth roller box all may further comprise the steps:
1. forging molding: employing carburizing steel is material, in electric furnace described carburizing steel is forged upper gear box;
2. for the first time normalizing: under the temperature between 840 to 870 degrees centigrade the lower tooth roller box is carried out normalized treatment, the normalized treatment time is 1 to 2 hour;
3. for the second time normalizing: the lower tooth roller box of normalized treatment carries out the normalized treatment second time to finishing for the first time under the temperature between 810 to 830 degrees centigrade, and the time is 1 hour;
4. roughing: adopt roughing milling cutter that described lower tooth roller box is carried out roughing;
5. fine finishining: after roughing, adopt milling cutter that described lower tooth roller box is carried out fine finishining, make the roughness of the lower tooth roller box after the processing be: Ra=3 μ m, flatness is: 0.05mm;
6. deburring is cleaned: the lower tooth roller box after the fine finishining is carried out deburring clean;
7. carburizing and quenching: under the temperature between 850 to 890 degrees centigrade gear-box being carried out the Quenching Treatment cool time is 40 minutes, and quenching medium is water or oil;
8. high tempering: under 200 to 230 degrees centigrade temperature the lower tooth roller box that quenches complete is carried out temper, tempering time is for being 1 to 1.5 hour;
9. for the second time deburring is cleaned: adopt small tool to finishing the lower tooth roller box deburring of high tempering, then clean;
10: check: whether the lower tooth roller box to completion of processing is tested, to check this lower tooth roller box qualified;
Wherein, adopt the method the same with the manufacture method of described lower tooth roller box to make upper gear box.
2. the manufacture method of installing locomotive gear cases as claimed in claim 1, it is characterized in that: the material of described carburizing steel is: one of 20CrMnTi, 20CrMnMo, 15CrNi6,17Cr2Ni2A, 20CrNi2MoA, 17CrNiMo6 or 17Cr2Ni2MoA are any.
3. the manufacture method of installing locomotive gear cases as claimed in claim 1, it is characterized in that: the material of described carburizing steel is: one of 42CrMoA or 34Cr2Ni2MoA are any.
4. the manufacture method of installing locomotive gear cases as claimed in claim 1 is characterized in that: adopt numerically controlled lathe to carry out the roughing of described step 4 and the fine finishining of described step 5, described numerically controlled lathe is preferably five numerically controlled lathes of planer-type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210332983.XA CN102941437B (en) | 2012-06-29 | 2012-09-11 | A kind of installing locomotive gear cases manufacture method |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210219587.6 | 2012-06-28 | ||
| CN2012102195876A CN102699638A (en) | 2012-06-29 | 2012-06-29 | Method for manufacturing locomotive gearbox |
| CN201210332983.XA CN102941437B (en) | 2012-06-29 | 2012-09-11 | A kind of installing locomotive gear cases manufacture method |
Publications (2)
| Publication Number | Publication Date |
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| CN102941437A true CN102941437A (en) | 2013-02-27 |
| CN102941437B CN102941437B (en) | 2015-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012102195876A Pending CN102699638A (en) | 2012-06-29 | 2012-06-29 | Method for manufacturing locomotive gearbox |
| CN201210332983.XA Active CN102941437B (en) | 2012-06-29 | 2012-09-11 | A kind of installing locomotive gear cases manufacture method |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012102195876A Pending CN102699638A (en) | 2012-06-29 | 2012-06-29 | Method for manufacturing locomotive gearbox |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104015003A (en) * | 2014-06-12 | 2014-09-03 | 靖江市顺达模具厂 | Method for machining gearbox |
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| CN103909391A (en) * | 2014-03-12 | 2014-07-09 | 苏州锻压厂有限责任公司 | Method for fabricating high-speed rail train gear |
| CN104308468B (en) * | 2014-09-04 | 2017-02-15 | 重庆江增船舶重工有限公司 | High-speed gearbox processing method |
| CN105296732A (en) * | 2015-11-11 | 2016-02-03 | 芜湖天金机械有限公司 | Universal joint spherical shell quenching tempering process for improving metallurgical structure |
| CN105420475A (en) * | 2015-11-20 | 2016-03-23 | 芜湖天金机械有限公司 | Quench tempering technology for reducing treatment of starlike sleeve |
| CN106312478B (en) * | 2016-10-13 | 2018-07-06 | 南京创贝高速传动机械有限公司 | A kind of ship gear-box |
| CN111590273A (en) * | 2020-05-18 | 2020-08-28 | 博谷机械设备（昆山）有限公司 | Machining process of large gear box |
| CN113290349A (en) * | 2021-03-17 | 2021-08-24 | 无锡尚赛精密机械有限公司 | Preparation process of worm gear case shell |
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- 2012-06-29 CN CN2012102195876A patent/CN102699638A/en active Pending
- 2012-09-11 CN CN201210332983.XA patent/CN102941437B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104015003A (en) * | 2014-06-12 | 2014-09-03 | 靖江市顺达模具厂 | Method for machining gearbox |
| CN104015003B (en) * | 2014-06-12 | 2016-06-15 | 靖江市顺达模具厂 | A kind of processing method of gear-box |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102699638A (en) | 2012-10-03 |
| CN102941437B (en) | 2015-11-25 |
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Address after: 213300 No. 8, Zhongguancun Avenue, Liyang, Jiangsu Patentee after: Jiangsu Jinyuan High-end Equipment Co., Ltd. Address before: 213376 No. 1008 Ling Ling West Road, Jiangsu, Liyang Patentee before: Jiangsu Jinyuan Forging Co., Ltd. |