CN105643218A - Machining method of gear parts of gearbox - Google Patents

Machining method of gear parts of gearbox Download PDF

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Publication number
CN105643218A
CN105643218A CN201410644341.2A CN201410644341A CN105643218A CN 105643218 A CN105643218 A CN 105643218A CN 201410644341 A CN201410644341 A CN 201410644341A CN 105643218 A CN105643218 A CN 105643218A
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CN
China
Prior art keywords
conducted
temperature
quenching
gear
carburizing
Prior art date
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Pending
Application number
CN201410644341.2A
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Chinese (zh)
Inventor
吴家超
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chongqing Chungu Machinery Manufacturing Co Ltd
Original Assignee
Chongqing Chungu Machinery Manufacturing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Chongqing Chungu Machinery Manufacturing Co Ltd filed Critical Chongqing Chungu Machinery Manufacturing Co Ltd
Priority to CN201410644341.2A priority Critical patent/CN105643218A/en
Publication of CN105643218A publication Critical patent/CN105643218A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a machining method of gear parts of a gearbox. The machining method is characterized by comprising the following steps that (1) the material 20CrMnTi is selected; (2) furnace charging and heating are conducted; (3) forging is conducted; (4) shot blasting is conducted for the first time; (5) rough machining is conducted; (6) normalizing is conducted; (7) gear hobbing is conducted; (8) gear shaving is conducted; (9) deburring and cleaning are conducted; (10) carburizing and quenching are conducted; (11) tempering is conducted; (12) shot blasting is conducted for the second time; (13) an inner hole is ground; and (14) rust protection, checking, packaging and storage are conducted sequentially. According to the machining method of the gear parts of the gearbox, the surface hardness is 58-62 HRC after carburizing and quenching and low-temperature tempering are conducted, the hardness of the core is 35-42 HRC, and the machinability of the 20CrMnTi is improved through normalizing after forging; in addition, cooling and quenching can be conducted directly after carburizing, the carburizing speed is high, transition layers are uniform, the deformation amount is small after carburizing, and the advantages of being capable of bearing high-speed moderate load and impact, resistant to friction and the like are achieved.

Description

A kind of gearbox gear method of processing parts
Technical field
The invention belongs to thermal treatment process, specifically a kind of gearbox gear method of processing parts.
Background technology
In the prior art, a kind of gearbox gear, its material is 20CrMnTi, it is a kind of converted steel, converted steel be generally carbon content be 0.17%��0.24% soft steel be that its hardening capacity is higher, ensureing in through hardening situation, there is higher intensity and toughness, particularly there is higher low-temperature impact toughness, so it manufactures gearbox gear part through to be usually used on processing automobile multiplex, but in processing treatment process, technology controlling and process is not good, can there is carburizing rear surface and crackle occurs, and centre hardness is inadequate, infiltration layer is uneven, deformation defect after quenching. For solving the problem, it is necessary to a kind of gearbox gear method of processing parts, makes the tooth face hardness of gearbox gear part and periphery hardness all can reach processing request.
Summary of the invention
In view of the deficiency that prior art exists, it is an object of the invention to propose a kind of gearbox gear method of processing parts, eliminate the negative impact of speed of cooling when being quenched by product and hardening capacity, make the tooth face hardness of gearbox gear part and periphery hardness all can reach processing request.
The technical scheme realizing the object of the invention is as follows:
A kind of gearbox gear method of processing parts, described gearbox gear material is 20CrMnTi, it is characterised in that, this working method comprises the following steps:
(1) selection: select the trade mark to be 20CrMnTi;
(2) shove charge heating: heating in process furnace, Heating temperature is 850��1200 DEG C, is incubated 8��10 hours;
(3) forge: die forging machine carries out twice upsetting pull, ensure that upsetting pull ratio is for the first time: 1.1��jumping-up ratio��1.6,1.3��pull out long ratio��2.5, second time upsetting pull ratio is: 1.1��jumping-up is than��1.3,1.4��pull out long ratio��2.5, keep forging temperature 850��1200 DEG C, final forging temperature >=720;
(4) first Shot Blastings;
(5) first roughing, then precision machined surface, roughness Ra is less than 1.6um;
(6) normalizing treatment: normalizing temperature 850��950 DEG C;
(7) gear hobbing process: make the roughness of the lower gear case after processing be: Ra < 6.3 ��m;
(8) Shaving Process: make the roughness of the lower gear case after processing be: Ra < 1.6 ��m;
(9) deburring is cleaned: the lower gear case after precision work is carried out deburring cleaning;
(10) carburizing and quenching: quenching temperature 850��950 DEG C, the cool time 60��90min, quenching medium is water or oil;
(11) temper: tempering temperature 150��220 DEG C;
(12) the 2nd Shot Blastings;
(13) inner hole grinding, makes the roughness of the lower gear case after processing be: Ra < 1.6 ��m;
(14) antirust successively, inspection, packaging, warehouse-in.
A kind of gearbox gear method of processing parts of the present invention, strictly each stage process parameter is controlled, after carburizing and quenching low-temperaturetempering, surface hardness is 58��62HRC, and centre hardness is 35��42HRC, 20CrMnTi improves its machinability with normalizing after forging, in addition, quenching of can directly lowering the temperature after carburizing, and carburizing speed is very fast, transition layer is relatively even, is out of shape little can bearing at a high speed and carries and the advantage such as impact and rub resistance after carburizing and quenching.
Embodiment
Below in conjunction with embodiment, the invention will be further described, and its operation steps is as follows:
A kind of gearbox gear method of processing parts, described gearbox gear material is 20CrMnTi, and this working method comprises the following steps:
(1) selection: select the trade mark to be 20CrMnTi;
(2) shove charge heating: heating in process furnace, Heating temperature is 850��1200 DEG C, is incubated 8��10 hours;
(3) forge: die forging machine carries out twice upsetting pull, ensure that upsetting pull ratio is for the first time: 1.1��jumping-up ratio��1.6,1.3��pull out long ratio��2.5, second time upsetting pull ratio is: 1.1��jumping-up is than��1.3,1.4��pull out long ratio��2.5, keep forging temperature 850��1200 DEG C, final forging temperature >=720;
(4) first Shot Blastings;
(5) first roughing, then precision machined surface, roughness Ra is less than 1.6um;
(6) normalizing treatment: normalizing temperature 850��950 DEG C;
(7) gear hobbing process: make the roughness of the lower gear case after processing be: Ra < 6.3 ��m;
(8) Shaving Process: make the roughness of the lower gear case after processing be: Ra < 1.6 ��m;
(9) deburring is cleaned: the lower gear case after precision work is carried out deburring cleaning;
(10) carburizing and quenching: quenching temperature 850��950 DEG C, the cool time 60��90min, quenching medium is water or oil;
(11) temper: tempering temperature 150��220 DEG C;
(12) the 2nd Shot Blastings;
(13) inner hole grinding, makes the roughness of the lower gear case after processing be: Ra < 1.6 ��m;
(14) antirust successively, inspection, packaging, warehouse-in.

Claims (1)

1. a gearbox gear method of processing parts, it is characterised in that, this working method comprises the following steps:
(1) selection: select the trade mark to be 20CrMnTi;
(2) shove charge heating: heating in process furnace, Heating temperature is 850��1200 DEG C, is incubated 8��10 hours;
(3) forge: die forging machine carries out twice upsetting pull, ensure that upsetting pull ratio is for the first time: 1.1��jumping-up ratio��1.6,1.3��pull out long ratio��2.5, second time upsetting pull ratio is: 1.1��jumping-up is than��1.3,1.4��pull out long ratio��2.5, keep forging temperature 850��1200 DEG C, final forging temperature >=720;
(4) first Shot Blastings;
(5) first roughing, then precision machined surface, roughness Ra is less than 1.6um;
(6) normalizing treatment: normalizing temperature 850��950 DEG C;
(7) gear hobbing process: make the roughness of the lower gear case after processing be: Ra < 6.3 ��m;
(8) Shaving Process: make the roughness of the lower gear case after processing be: Ra < 1.6 ��m;
(9) deburring is cleaned: the lower gear case after precision work is carried out deburring cleaning;
(10) carburizing and quenching: quenching temperature 850��950 DEG C, the cool time 60��90min, quenching medium is water or oil;
(11) temper: tempering temperature 150��220 DEG C;
(12) the 2nd Shot Blastings;
(13) inner hole grinding, makes the roughness of the lower gear case after processing be: Ra < 1.6 ��m;
(14) antirust successively, inspection, packaging, warehouse-in.
CN201410644341.2A 2014-11-14 2014-11-14 Machining method of gear parts of gearbox Pending CN105643218A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410644341.2A CN105643218A (en) 2014-11-14 2014-11-14 Machining method of gear parts of gearbox

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410644341.2A CN105643218A (en) 2014-11-14 2014-11-14 Machining method of gear parts of gearbox

Publications (1)

Publication Number Publication Date
CN105643218A true CN105643218A (en) 2016-06-08

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Application Number Title Priority Date Filing Date
CN201410644341.2A Pending CN105643218A (en) 2014-11-14 2014-11-14 Machining method of gear parts of gearbox

Country Status (1)

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CN (1) CN105643218A (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106964948A (en) * 2017-05-26 2017-07-21 孙阳 A kind of processing technology of marine gear
CN107052729A (en) * 2017-04-17 2017-08-18 常州机电职业技术学院 The processing method of gear
CN107225208A (en) * 2017-07-13 2017-10-03 江阴南工锻造有限公司 A kind of little gear forging technology
CN107282837A (en) * 2017-07-13 2017-10-24 江阴南工锻造有限公司 A kind of open socket forging method
CN107312921A (en) * 2017-05-16 2017-11-03 沈阳透平机械股份有限公司 A kind of method for reducing thin-walled carburizing and quenching high gear amount of distortion and application
CN107385187A (en) * 2017-06-21 2017-11-24 安徽金越轴承有限公司 A kind of Tempering and Quenching method of bearing holder (housing, cover) processing
CN108705014A (en) * 2018-05-08 2018-10-26 石钢京诚装备技术有限公司 A kind of die forging method of module forging
CN108747237A (en) * 2018-08-06 2018-11-06 合肥银泉铸造有限责任公司 A kind of roller gear processing technology
CN108942125A (en) * 2018-08-06 2018-12-07 合肥银泉铸造有限责任公司 A kind of diclinic Gearmaking Technology
CN108950153A (en) * 2018-08-06 2018-12-07 合肥银泉铸造有限责任公司 A kind of cylindric spiral gear processing technology
CN110216429A (en) * 2019-04-30 2019-09-10 兴化市统一齿轮有限公司 A kind of automobile gearbox gear and its manufacturing method
CN110565043A (en) * 2019-09-24 2019-12-13 重庆齿轮箱有限责任公司 Method for processing gears with different modules on same part
CN111500834A (en) * 2020-05-27 2020-08-07 江苏联峰实业有限公司 Heat treatment process of gear steel for automobile gearbox
CN111571156A (en) * 2020-05-29 2020-08-25 全椒县众联机械有限公司 Cylindrical gear machining method with high impact resistance

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107052729A (en) * 2017-04-17 2017-08-18 常州机电职业技术学院 The processing method of gear
CN107312921B (en) * 2017-05-16 2019-07-30 沈阳透平机械股份有限公司 A kind of method and application reducing thin-walled carburizing and quenching high gear amount of distortion
CN107312921A (en) * 2017-05-16 2017-11-03 沈阳透平机械股份有限公司 A kind of method for reducing thin-walled carburizing and quenching high gear amount of distortion and application
CN106964948A (en) * 2017-05-26 2017-07-21 孙阳 A kind of processing technology of marine gear
CN107385187A (en) * 2017-06-21 2017-11-24 安徽金越轴承有限公司 A kind of Tempering and Quenching method of bearing holder (housing, cover) processing
CN107282837B (en) * 2017-07-13 2019-01-29 江阴南工锻造有限公司 A kind of open socket forging method
CN107225208A (en) * 2017-07-13 2017-10-03 江阴南工锻造有限公司 A kind of little gear forging technology
CN107282837A (en) * 2017-07-13 2017-10-24 江阴南工锻造有限公司 A kind of open socket forging method
CN107225208B (en) * 2017-07-13 2019-01-29 江阴南工锻造有限公司 A kind of pinion gear forging technology
CN108705014A (en) * 2018-05-08 2018-10-26 石钢京诚装备技术有限公司 A kind of die forging method of module forging
CN108705014B (en) * 2018-05-08 2019-11-08 石钢京诚装备技术有限公司 A kind of die forging method of module forging
CN108950153A (en) * 2018-08-06 2018-12-07 合肥银泉铸造有限责任公司 A kind of cylindric spiral gear processing technology
CN108942125A (en) * 2018-08-06 2018-12-07 合肥银泉铸造有限责任公司 A kind of diclinic Gearmaking Technology
CN108747237A (en) * 2018-08-06 2018-11-06 合肥银泉铸造有限责任公司 A kind of roller gear processing technology
CN110216429A (en) * 2019-04-30 2019-09-10 兴化市统一齿轮有限公司 A kind of automobile gearbox gear and its manufacturing method
CN110565043A (en) * 2019-09-24 2019-12-13 重庆齿轮箱有限责任公司 Method for processing gears with different modules on same part
CN111500834A (en) * 2020-05-27 2020-08-07 江苏联峰实业有限公司 Heat treatment process of gear steel for automobile gearbox
CN111571156A (en) * 2020-05-29 2020-08-25 全椒县众联机械有限公司 Cylindrical gear machining method with high impact resistance

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Application publication date: 20160608

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