CN103643023B - Method for carrying out carburizing and quenching by changing procedure of bearing ring processing - Google Patents

Method for carrying out carburizing and quenching by changing procedure of bearing ring processing Download PDF

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Publication number
CN103643023B
CN103643023B CN201310602693.7A CN201310602693A CN103643023B CN 103643023 B CN103643023 B CN 103643023B CN 201310602693 A CN201310602693 A CN 201310602693A CN 103643023 B CN103643023 B CN 103643023B
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Prior art keywords
quenching
ring
carburizing
mould
putting
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CN103643023A (en
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沈伟毅
郝亚硕
陈文君
宋华华
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Luoyang LYC Bearing Co Ltd
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Luoyang LYC Bearing Co Ltd
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Abstract

The invention discloses a method for carrying out carburizing and quenching by changing the procedure of bearing ring processing. The method comprises the following steps: (1) drilling a cylindrical hole in the inner ring, leaving an inner diameter with working allowance, coating the inner ring and the inner diameter with anti-carburizing paint; (2) carburizing heat treatment: putting a carburizing material rack in the inner ring, then putting the inner ring into a carburizing furnace, heating to a temperature of 920 DEG C to 940 DEG C, then cooling to a temperate of 880 DEG C to 900 DEG C, taking out the inner ring, cooling with oil; putting the inner ring which has been subjected to high-temperature tempering in a quenching material rack; then putting the quenching material rack into a quenching furnace, heating the cylindrical hole quenching mould on the furnace outlet sleeve, then quenching the mould in quenching oil so as to cool the mould, taking out the mould from the quenching oil, removing the cylindrical hole quenching mould, putting the inner ring on a tempering material rack, tempering in a low temperature; (3) carrying out lathe processing and then grinding processing so as to process the inner diameter of inner ring into a required conicity of finished product. The processing method provided by the invention is easy and practicable, the inner diameter of the inner ring is straight after the lathe processing, original quenching mould is adopted, the diameter of the inner ring is processed into a diameter with a certain conicity after the carburizing and quenching processes, and thus solves the problem of difficulty in designing and manufacturing a quenching mould with a certain conicity, high manufacturing cost, and long processing period which causes the inability of satisfying the emergent requirement in production.

Description

A kind ofly change the method that bearing ring manufacturing procedure carries out carburizing and quenching
Technical field
The invention belongs to bearing processing technical field, what relate generally to is change the method that bearing ring manufacturing procedure carries out carburizing and quenching.
Prior art
The carburizing bearing inner ring of internal diameter band tapering, because structure is special, thermal treatment needs inner ring taper quenching mould, the cylindrical hole quenching mould of existing heat-treatment quenching, and its mould external diameter is straight, and mould is put to enter, and causes and cannot use.Owing to being with, the quenching mould design difficulty of tapering is large, cost of manufacture is higher and the process-cycle is longer, cannot meet to produce to be badly in need of.
Summary of the invention
The object of the invention is to propose a kind ofly to change the method that bearing ring manufacturing procedure carries out carburizing and quenching, reach reduction production cost, but also the object that can enhance productivity significantly.
For achieving the above object, the method that the present invention takes is: working method flow process is: the cylindrical hole Vehicle Processing inner ring that leaves process redundancy---internal diameter is coated with masking paste---and carburizing---primary quenching---high tempering----utilize the finished product tapering of cylindrical hole quenching mould secondary quenching---tempering----be processed into inner ring internal diameter.
Its concrete grammar:
1, inner ring is pressed cylindrical hole processing, and leave the internal diameter of process redundancy, inner ring internal diameter is coated with masking paste;
2, carburizing thermal treatment:
On a, inner ring embedded carburizing bin,
B, putting into cementing furnace by loading the carburizing bin of inner ring, being heated to 920 DEG C-940 DEG C, being cooled to 880 DEG C-900 DEG C oil coolings of coming out of the stove;
C, high tempering: 590 DEG C-610 DEG C, time 11.5h-12.5h(hour), then through 640 DEG C ± (-) 660 DEG C, time 11.5h-12.5h(hour) tempering;
On d, inner ring embedded quenching material shelf;
E, putting into quenching furnance by loading the quenching material shelf of inner ring, being heated to 800 DEG C-810 DEG C, 125min-45(145) min(minute) come out of the stove put cylindrical hole quenching mould after quench in quenching oil and cool, lay down cylindrical hole quenching mould after fuel-displaced;
On f, inner ring embedded tempering bin;
G, low-temperaturetempering: 155 DEG C-165 DEG C × 11.5h-12.5h(hour);
3, Vehicle Processing is regrinded and is processed the tapering of inner ring internal diameter finished product requirement.
The not Vehicle Processing of carburizing bearing inner ring internal diameter is that namely internal diameter tapering is processed by cylindrical hole by the present invention; carburizing treatment is carried out again after utilizing masking paste to carry out anti-carburizi ng protection to inner ring internal diameter; secondary quenching quenches with regard to the existing quenching mould of available heat process (cylindrical hole quenching mould); afterwards due to lower by internal diameter hardness after masking paste cement protection inner ring internal diameter; can regrind after Vehicle Processing and be processed into inner ring internal diameter tapering; reach reduction production cost, but also the object that can enhance productivity significantly.Operation of the present invention is processed by cylindrical hole by inner ring internal diameter---internal diameter is coated with masking paste---and carburizing---primary quenching---high tempering----utilize the finished product tapering of original cylindrical hole quenching mould secondary quenching---tempering----be processed into inner ring internal diameter,----processing inner ring internal diameter tapering---carburizing---primary quenching---high tempering----taper quenching mould secondary quenching---tempering----processing inner ring internal diameter tapering and former operation is for designing and producing taper quenching mould, by two operation contrasts, the simple and convenient processing method that the present invention adopts is easy, Vehicle Processing inner ring internal diameter is straight, adopt original quenching mould, after carburizing and quenching, reprocessing is the internal diameter of certain taper, the quenching mould difficulty solving former process step design making band tapering is large, cost of manufacture higher and process-cycle is longer cannot meet the problem of producing and being badly in need of.
Embodiment
Embodiment 1: describedly to the method that carburizing and quenching is carried out in bearing ring processing be:
1, inner ring is pressed cylindrical hole processing, and leave the internal diameter of process redundancy, inner ring internal diameter is coated with masking paste
2, carburizing thermal treatment
On a, inner ring embedded carburizing bin,
B, putting into cementing furnace by loading the carburizing bin of inner ring, being heated to 930 DEG C, being cooled to 890 DEG C of oil coolings of coming out of the stove,
C, high tempering: 600 DEG C × 12h(hour) again through 650 DEG C × 12h(hour) tempering,
On d, inner ring embedded quenching material shelf,
E, putting into quenching furnance by loading the quenching material shelf of inner ring, being heated to 805 DEG C, 135min(minute) come out of the stove put cylindrical hole quenching mould after quench in quenching oil and cool, lay down cylindrical hole quenching mould after fuel-displaced,
On f, inner ring embedded tempering bin,
G, low-temperaturetempering: 160 DEG C × 12h(hour);
3, the tapering of inner ring internal diameter finished product requirement is processed.

Claims (1)

1. change the method that bearing ring manufacturing procedure carries out carburizing and quenching, it is characterized in that: it comprises the following steps:
(1), by inner ring press cylindrical hole processing, and leave the internal diameter of process redundancy, inner ring internal diameter is coated with masking paste;
(2), carburizing thermal treatment:
On a, inner ring embedded carburizing bin,
B, putting into cementing furnace by loading the carburizing bin of inner ring, being heated to 920 DEG C-940 DEG C, being cooled to 880 DEG C-900 DEG C oil coolings of coming out of the stove;
C, high tempering: 590 DEG C-610 DEG C × 11.5h-12.5h, then through 640 DEG C-660 DEG C × 11.5h-12.5h tempering;
On d, inner ring embedded quenching material shelf;
E, putting into quenching furnance by loading the quenching material shelf of inner ring, being heated to 800 DEG C-810 DEG C, 125min-145min quenches after coming out of the stove and putting cylindrical hole quenching mould in quenching oil and cools, and lays down cylindrical hole quenching mould after fuel-displaced;
On f, inner ring embedded tempering bin;
G, low-temperaturetempering: 155 DEG C-165 DEG C × 11.5h-12.5h;
(3), Vehicle Processing is regrinded and is processed the tapering of inner ring internal diameter finished product requirement.
CN201310602693.7A 2013-11-26 2013-11-26 Method for carrying out carburizing and quenching by changing procedure of bearing ring processing Active CN103643023B (en)

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CN201310602693.7A CN103643023B (en) 2013-11-26 2013-11-26 Method for carrying out carburizing and quenching by changing procedure of bearing ring processing

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CN201310602693.7A CN103643023B (en) 2013-11-26 2013-11-26 Method for carrying out carburizing and quenching by changing procedure of bearing ring processing

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CN103643023B true CN103643023B (en) 2015-06-24

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Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104120224A (en) * 2014-07-10 2014-10-29 洛阳汇工轴承科技有限公司 A quenching process of carburizing bearing steel
CN104195308A (en) * 2014-08-17 2014-12-10 成都亨通兆业精密机械有限公司 Alloy steel bearing block machining method beneficial to reduction of heat treatment induced cracks
CN104493446B (en) * 2015-01-23 2017-02-01 中航工业哈尔滨轴承有限公司 Manufacturing method of carburizing steel bearing ring
CN107058699B (en) * 2017-04-14 2018-11-23 武汉理工大学 A kind of pressure quenching mold component of high-speed rail bearer ring
CN107475502A (en) * 2017-07-14 2017-12-15 洛阳汇工轴承科技有限公司 High-environmental Bearing Quenching new technology
CN107740119A (en) * 2017-10-20 2018-02-27 苏州市天星山精密模具有限公司 A kind of Technology for Heating Processing of injection mold
CN108504845A (en) * 2017-11-22 2018-09-07 新昌县回山镇金帛机械厂 A kind of heat treatment process of lasso
CN108480536A (en) * 2018-03-02 2018-09-04 江苏保捷精锻有限公司 A kind of automatic forging method and apparatus of bearing products
CN108559943A (en) * 2018-05-03 2018-09-21 洛阳Lyc轴承有限公司 The heat treatment process of carburizing steel bearing ring
CN108517402A (en) * 2018-06-15 2018-09-11 甘肃省合作早子沟金矿有限责任公司 A kind of environmental protection carries the gold extracting method of resin adsorption desorption after gold
CN108842129A (en) * 2018-06-29 2018-11-20 洛阳Lyc轴承有限公司 A kind of processing technology of super-huge carburizing bearing internal diameter of the internal diameter with angle

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