CN102581574A - Method for machining inner gear rings - Google Patents

Method for machining inner gear rings Download PDF

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Publication number
CN102581574A
CN102581574A CN2012100735583A CN201210073558A CN102581574A CN 102581574 A CN102581574 A CN 102581574A CN 2012100735583 A CN2012100735583 A CN 2012100735583A CN 201210073558 A CN201210073558 A CN 201210073558A CN 102581574 A CN102581574 A CN 102581574A
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CN
China
Prior art keywords
normalizing
quenched
ring gear
gear
processing
Prior art date
Application number
CN2012100735583A
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Chinese (zh)
Inventor
江国辉
Original Assignee
江国辉
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 江国辉 filed Critical 江国辉
Priority to CN2012100735583A priority Critical patent/CN102581574A/en
Publication of CN102581574A publication Critical patent/CN102581574A/en

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Abstract

The invention discloses a method for machining inner gear rings. The method includes steps of forging, normalizing, rough lathing, finish lathing, gear shaping, carburizing, pressure quenching and shot blasting. By the aid of the method, surface hardness, core structure and depth of a hardened layer of a gear ring are improved, machining cost is lowered, deformation of the gear ring is avoided assuredly, accordingly, the service life of the gear ring is prolonged, and the load capacity of a vehicle is enhanced.

Description

A kind of processing method of ring gear
Technical field
The present invention relates to a kind of processing method of ring gear.
Background technology
The automobile synchronizer gear ring is one of important spare part in the automobile variable speed mechanism, and its crudy, structure, service life etc. directly have influence on the cruising of automobile and driver and crew's personal safety, and Domestic Automotive Industry is started late, and its heat treatment technics is comparatively backward; Picture adopts the technology processing ring gear of ionic nitriding, can not satisfy the requirement of present automobile, and medium carbon alloy steels such as 40Cr are adopted in gear ring processing usually; Earlier rough turn, modified again, after carry out fine finishining; Carry out nitrogenize then, do to prevent the gear ring distortion like this, but its case hardness is low; Hardened layer is shallow, and processing cost is high, presses for a kind of method now and solves these difficult problems.
Summary of the invention
The invention provides a kind of processing method of ring gear, the gear ring that this method is made can improve case hardness, centre hardness, hardened-depth, cut down finished cost, and can guarantee the gear ring size again.
The present invention has adopted following technical scheme: a kind of processing method of ring gear, and it may further comprise the steps: step 1, forging, select low-carbon alloy steel for use, reserve surplus, forging and molding according to drawing requirement; Step 2, normalizing are adopted the isothermal normalizing technology to eliminate and are forged the harmful structure that produces, and make even tissue; Step 3, rough turn is removed a large amount of surpluses, and cylindrical, hole, end face are carried out preliminarily forming; Step 4, finish turning are shaped cylindrical, hole, end face, seam according to the specification requirement finish turning; Step 5, gear shaping are with the tooth Profile Machining moulding of ring gear; Step 6, carburizing through the multipurpose furnace carburizing, guarantee that carburized layer is between 0.6-1.0mm; Step 7, pressure are quenched, and with the workpiece heating, move to press on the press again and quench; Step 8, ball blast carry out ball blast with the workpiece that it is good that pressure is quenched, and surperficial non-martensite is removed in the clean surface, obtains finished product.
Normalizing temperature is 920-930 ℃ in the said normalizing process, and isothermal temperature is 600-650 ℃, and hardness is 160-200HBW after the isothermal normalizing; Said pressure is quenched in the process workpiece is quenched pressing after being heated to the 840-860 degree on the rotary hearth furnace.
The present invention has following beneficial effect: the gear ring that the present invention makes had both improved case hardness, core structure, hardened-depth, had cut down finished cost, and can guarantee the gear ring distortion again, thereby improve the service life of gear ring and the load-carrying ability of car.
Description of drawings
Fig. 1 is a process chart of the present invention.
The specific embodiment
As shown in Figure 1, the invention provides a kind of processing method of ring gear, it may further comprise the steps: step 1, forge, select low-carbon alloy steel 20CrMnTiH material for use, reserve surplus, forging and molding according to drawing requirement; Step 2, the isothermal normalizing technology is adopted in normalizing, and normalizing temperature is at 920-930 ℃, and isothermal temperature 600-650 ℃, hardness 160-200HBW after the isothermal normalizing, and can eliminate the harmful structure of forging generation, and make even tissue; Step 3, rough turn, remove a large amount of surpluses, cylindrical, hole, end face are carried out preliminarily forming; Step 4, finish turning is shaped cylindrical, hole, end face, seam according to the specification requirement finish turning; Step 5, gear shaping, with the tooth Profile Machining moulding of ring gear, profile accuracy guarantees within 8 grades; Step 6, carburizing through the multipurpose furnace carburizing, guarantees that carburized layer is between 0.6-1.0mm; Step 7, pressure is quenched, and workpiece is heated to the 840-860 degree on rotary hearth furnace, moves to press on the press to quench again, and can reduce distortion like this, and profile of tooth can guarantee within 9 grades; Step 8, ball blast carries out ball blast with the workpiece that it is good that pressure is quenched, and surperficial non-martensite is removed in the clean surface, can increase the service life of gear ring like this.

Claims (3)

1. the processing method of a ring gear is characterized in that it may further comprise the steps:
Low-carbon alloy steel is selected in step 1, forging for use, reserves surplus, forging and molding according to drawing requirement;
Step 2, normalizing are adopted the isothermal normalizing technology to eliminate and are forged the harmful structure that produces, and make even tissue;
Step 3, rough turn is removed a large amount of surpluses, and cylindrical, hole, end face are carried out preliminarily forming;
Step 4, finish turning are shaped cylindrical, hole, end face, seam according to the specification requirement finish turning;
Step 5, gear shaping are with the tooth Profile Machining moulding of ring gear;
Step 6, carburizing through the multipurpose furnace carburizing, guarantee that carburized layer is between 0.6-1.0mm;
Step 7, pressure are quenched, and with the workpiece heating, move to press on the press again and quench;
Step 8, ball blast carry out ball blast with the workpiece that it is good that pressure is quenched, and surperficial non-martensite is removed in the clean surface, obtains finished product.
2. the processing method of a kind of ring gear according to claim 1 is characterized in that normalizing temperature is 920-930 ℃ in the said normalizing process, and isothermal temperature is 600-650 ℃, and hardness is 160-200HBW after the isothermal normalizing.
3. the processing method of a kind of ring gear according to claim 1 is characterized in that said pressure is quenched in the process workpiece is quenched pressing after being heated to the 840-860 degree on the rotary hearth furnace.
CN2012100735583A 2012-03-20 2012-03-20 Method for machining inner gear rings CN102581574A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012100735583A CN102581574A (en) 2012-03-20 2012-03-20 Method for machining inner gear rings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012100735583A CN102581574A (en) 2012-03-20 2012-03-20 Method for machining inner gear rings

Publications (1)

Publication Number Publication Date
CN102581574A true CN102581574A (en) 2012-07-18

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102744576A (en) * 2012-07-23 2012-10-24 南通爱利特机电制造有限公司 Machining method of elevator safety tongs wedge block
CN102979884A (en) * 2012-11-23 2013-03-20 无锡威孚中意齿轮有限责任公司 Mine vehicle axle wheel reductor planetary gear and manufacture method thereof
CN103341735A (en) * 2013-07-09 2013-10-09 中联重科股份有限公司 Hollow shaft and manufacturing method thereof
CN103464983A (en) * 2013-09-18 2013-12-25 江国辉 Machining process for differential lock gear sleeve
CN103464991A (en) * 2013-09-18 2013-12-25 江国辉 Gear ring machining process
CN103464982A (en) * 2013-09-18 2013-12-25 江国辉 Machining process for fixed disks of synchronizers
CN103639674A (en) * 2013-12-04 2014-03-19 鞠小平 Method for machining inner gear ring for speed reducer
CN103753156A (en) * 2013-12-17 2014-04-30 宁波华液机器制造有限公司 Machining method for annular gear in internal gear pump
CN106964948A (en) * 2017-05-26 2017-07-21 孙阳 A kind of processing technology of marine gear
CN107350730A (en) * 2016-05-09 2017-11-17 南京晨伟机械设备制造有限公司 A kind of processing technology of valve seat
CN108000077A (en) * 2017-12-08 2018-05-08 东莞市领亚自动化科技有限公司 A kind of manufacture method of planetary reduction gear gear ring and the planetary reduction gear using the gear ring
CN108526827A (en) * 2018-04-08 2018-09-14 何盼 A kind of processing method of annular gear
CN108544033A (en) * 2018-04-08 2018-09-18 何盼 A kind of gear part of ring gear moulding process
CN109628727A (en) * 2018-12-11 2019-04-16 江苏保捷锻压有限公司 A kind of processing technology of thin-walled gear ring
CN110303305A (en) * 2019-07-23 2019-10-08 重庆申耀机械工业有限责任公司 A kind of processing technology of outer ring
CN110757254A (en) * 2018-07-25 2020-02-07 中国石油化工股份有限公司 Method for rapidly improving hydrogen embrittlement resistance of austenitic steel

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US5392517A (en) * 1994-01-07 1995-02-28 General Motors Corporation Method of making a ring gear
CN1887510A (en) * 2006-07-13 2007-01-03 重庆海通机械制造有限公司 Process of making annulus with bar steel
CN1963260A (en) * 2006-11-22 2007-05-16 重庆长风精化毛坯有限责任公司 Gear ring blank for automobile synchronizer and method for processing same
CN101659002A (en) * 2009-09-04 2010-03-03 重庆清平机械厂 Thin-wall annular gear processing method
CN101844306A (en) * 2010-06-17 2010-09-29 株洲齿轮有限责任公司 Processing method of annular gear of thin-wall member

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US5392517A (en) * 1994-01-07 1995-02-28 General Motors Corporation Method of making a ring gear
CN1887510A (en) * 2006-07-13 2007-01-03 重庆海通机械制造有限公司 Process of making annulus with bar steel
CN1963260A (en) * 2006-11-22 2007-05-16 重庆长风精化毛坯有限责任公司 Gear ring blank for automobile synchronizer and method for processing same
CN101659002A (en) * 2009-09-04 2010-03-03 重庆清平机械厂 Thin-wall annular gear processing method
CN101844306A (en) * 2010-06-17 2010-09-29 株洲齿轮有限责任公司 Processing method of annular gear of thin-wall member

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Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102744576A (en) * 2012-07-23 2012-10-24 南通爱利特机电制造有限公司 Machining method of elevator safety tongs wedge block
CN102979884A (en) * 2012-11-23 2013-03-20 无锡威孚中意齿轮有限责任公司 Mine vehicle axle wheel reductor planetary gear and manufacture method thereof
CN102979884B (en) * 2012-11-23 2015-04-29 无锡威孚中意齿轮有限责任公司 Manufacturing method for mine vehicle axle wheel reductor planetary gear
CN103341735B (en) * 2013-07-09 2016-06-08 中联重科股份有限公司 Hollow axle and manufacture method thereof
CN103341735A (en) * 2013-07-09 2013-10-09 中联重科股份有限公司 Hollow shaft and manufacturing method thereof
CN103464983A (en) * 2013-09-18 2013-12-25 江国辉 Machining process for differential lock gear sleeve
CN103464982A (en) * 2013-09-18 2013-12-25 江国辉 Machining process for fixed disks of synchronizers
CN103464991A (en) * 2013-09-18 2013-12-25 江国辉 Gear ring machining process
CN103639674A (en) * 2013-12-04 2014-03-19 鞠小平 Method for machining inner gear ring for speed reducer
CN103639674B (en) * 2013-12-04 2016-01-20 鞠小平 The processing method of reductor ring gear
CN103753156A (en) * 2013-12-17 2014-04-30 宁波华液机器制造有限公司 Machining method for annular gear in internal gear pump
CN103753156B (en) * 2013-12-17 2016-04-27 宁波华液机器制造有限公司 A kind of for the annular gear processing method in crescent gear pump
CN107350730A (en) * 2016-05-09 2017-11-17 南京晨伟机械设备制造有限公司 A kind of processing technology of valve seat
CN106964948A (en) * 2017-05-26 2017-07-21 孙阳 A kind of processing technology of marine gear
CN108000077A (en) * 2017-12-08 2018-05-08 东莞市领亚自动化科技有限公司 A kind of manufacture method of planetary reduction gear gear ring and the planetary reduction gear using the gear ring
CN108526827A (en) * 2018-04-08 2018-09-14 何盼 A kind of processing method of annular gear
CN108544033A (en) * 2018-04-08 2018-09-18 何盼 A kind of gear part of ring gear moulding process
CN110757254A (en) * 2018-07-25 2020-02-07 中国石油化工股份有限公司 Method for rapidly improving hydrogen embrittlement resistance of austenitic steel
CN109628727A (en) * 2018-12-11 2019-04-16 江苏保捷锻压有限公司 A kind of processing technology of thin-walled gear ring
CN110303305A (en) * 2019-07-23 2019-10-08 重庆申耀机械工业有限责任公司 A kind of processing technology of outer ring

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Application publication date: 20120718