CN105925763A - Local annealing method for air conditioner bearing lining - Google Patents
Local annealing method for air conditioner bearing lining Download PDFInfo
- Publication number
- CN105925763A CN105925763A CN201610368471.7A CN201610368471A CN105925763A CN 105925763 A CN105925763 A CN 105925763A CN 201610368471 A CN201610368471 A CN 201610368471A CN 105925763 A CN105925763 A CN 105925763A
- Authority
- CN
- China
- Prior art keywords
- inner sleeve
- bearing inner
- frequency induction
- induction heater
- heated
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
- C21D1/42—Induction heating
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention discloses a local annealing method for an air conditioner bearing lining. The local annealing method comprises the following steps that a, the part containing a thread of the bearing lining is heated through a high-frequency induction heater which wraps the periphery of the bearing lining through an annular heating pipe, the other parts of the bearing lining are immersed into cooling water, the high-frequency induction heater is heated to 700 DEG C-800 DEG C, heat is preserved for 2 h, and the water temperature is maintained to be 5 DEG C-15 DEG C; b, the high-frequency induction heater is heated to 850 DEG C-900 DEG C, the heat is preserved for 10 h, and the water temperature is maintained to be 5 DEG C-30 DEG C; c, the bearing lining is completely put into the cooling water and cooled for 2-3 h; and d, the part containing the thread of the bearing lining is heated to 800 DEG C-850 DEG C at the speed of 20 DEG C/h through the high-frequency induction heater again, subjected to heat preservation for 2-3 h and then taken out to be subjected to air cooling to the normal temperature. According to the local annealing method for the air conditioner bearing lining, the situation that a threaded hole and a certain range of the periphery of the threaded hole are partially softened is achieved, and the torque requirements for the bearing installing and locking are met.
Description
Technical field
The invention belongs to the annealing field of air-conditioning bearing, it is more particularly related to a kind of air-conditioning bearing
The differential annealing method of inner sleeve.
Background technology
For the bearing inner sleeve of band screw, screw is processed the most before heat treatment and is quenched to inner sleeve
How about HRC60, for meeting hardness requirement at screwed hole, carry out local after integral quenching to screw periphery
Soften.Currently used more be high-frequency induction heating localized annealing, by ring set at outer surface of workpiece
Annular-heating circle sensing heating around screw, conduction, make screw and place axial annular cylinder thereof soften,
Reduce the purpose of hardness.But the quality that heating-up temperature and heat conduction velocity control, directly affects lasso and moves back
Fire bating effect and overall performance.When heating-up temperature is higher, beneficially screw and periphery homo genizing annelaing softens,
But the high conduction effect that heat is in high-carbon steel, can involve lasso raceway, cause bearing working case hardness simultaneously
Reduce, affect bearing performance and service life；Heating-up temperature is on the low side, then cannot obtain preferable bating effect.
Summary of the invention
It is an object of the present invention to provide a kind of differential annealing method of air-conditioning bearing inner sleeve, it is achieved band screw axis bearing sleeve
Certain limit local softening around circle screw and screw, meets bearing and installs locking torque requirement, ensure simultaneously
The raceway hardness on bearing key job surface is unaffected during whole local softening, it is ensured that bearing uses
Performance.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is:
A kind of differential annealing method of air-conditioning bearing inner sleeve, comprises the following steps:
A, by bearing inner sleeve containing threaded portion use high frequency induction heater heating, high frequency induction heater lead to
Cross the periphery of circular heating tube parcel bearing inner sleeve, other of bearing inner sleeve are partly submerged in cooling water, high
Frequency sensing heater is heated to 700 DEG C～800 DEG C, is incubated 2 hours, and water temperature is maintained at 5 DEG C～15 DEG C；
B, again high frequency induction heater being heated to 850 DEG C～900 DEG C, be incubated 10 hours, water temperature is maintained at
5 DEG C～30 DEG C；
C, by bearing inner sleeve all put into cooling water in, cool down 2～3 hours；
D, again with high frequency induction heater by bearing inner sleeve containing threaded portion with 20 DEG C/h be heated to 800 DEG C～
850 DEG C, it is incubated 2～3 hours, then takes out air and be cooled to room temperature.
Preferably, cooling water uses semiconductor chilling plate to cool down.
Preferably, it is more than 1 hour hardened and tempered off time.
The invention has the beneficial effects as follows:
The present invention, by quenching and tempering, makes the even tissue of inner sleeve；It is former that the present invention effectively improves inner sleeve
Material structure portion is uniform, eliminates internal stress, it is achieved certain model around band screw axis bearing ring screw and screw
Enclose local softening, meet bearing and locking torque requirement is installed, ensure the raceway on bearing key job surface simultaneously
Hardness is unaffected during whole local softening, it is ensured that bearing serviceability.
Detailed description of the invention
Hereinafter embodiments of the invention are described in detail, but the present invention can be defined by the claims and
The multitude of different ways covered is implemented.
Embodiment one
A kind of differential annealing method of air-conditioning bearing inner sleeve, comprises the following steps:
A, by bearing inner sleeve containing threaded portion use high frequency induction heater heating, high frequency induction heater lead to
Cross the periphery of circular heating tube parcel bearing inner sleeve, other of bearing inner sleeve are partly submerged in cooling water, high
Frequency sensing heater is heated to 700 DEG C, is incubated 2 hours, and water temperature is maintained at 10 DEG C；
B, again high frequency induction heater being heated to 850 DEG C, be incubated 10 hours, water temperature is maintained at 15 DEG C；
C, by bearing inner sleeve all put into cooling water in, cool down 2 hours；
D, with high frequency induction heater bearing inner sleeve is heated to 800 DEG C containing threaded portion with 20 DEG C/h again,
It is incubated 2 hours, then takes out air and be cooled to room temperature.
Embodiment two
A kind of differential annealing method of air-conditioning bearing inner sleeve, comprises the following steps:
A, by bearing inner sleeve containing threaded portion use high frequency induction heater heating, high frequency induction heater lead to
Cross the periphery of circular heating tube parcel bearing inner sleeve, other of bearing inner sleeve are partly submerged in cooling water, high
Frequency sensing heater is heated to 750 DEG C, is incubated 2 hours, and water temperature is maintained at 10 DEG C；
B, again high frequency induction heater being heated to 880 DEG C, be incubated 10 hours, water temperature is maintained at 20 DEG C；
C, by bearing inner sleeve all put into cooling water in, cool down 2 hours；
D, with high frequency induction heater bearing inner sleeve is heated to 830 DEG C containing threaded portion with 20 DEG C/h again,
It is incubated 2 hours, then takes out air and be cooled to room temperature.
Embodiment three
A kind of differential annealing method of air-conditioning bearing inner sleeve, comprises the following steps:
A, by bearing inner sleeve containing threaded portion use high frequency induction heater heating, high frequency induction heater lead to
Cross the periphery of circular heating tube parcel bearing inner sleeve, other of bearing inner sleeve are partly submerged in cooling water, high
Frequency sensing heater is heated to 800 DEG C, is incubated 2 hours, and water temperature is maintained at 15 DEG C；
B, again high frequency induction heater being heated to 900 DEG C, be incubated 10 hours, water temperature is maintained at 30 DEG C；
C, by bearing inner sleeve all put into cooling water in, cool down 3 hours；
D, with high frequency induction heater bearing inner sleeve is heated to 850 DEG C containing threaded portion with 20 DEG C/h again,
It is incubated 3 hours, then takes out air and be cooled to room temperature.
Invention described above embodiment, is not intended that limiting the scope of the present invention, Ren He
Amendment, equivalent and the improvement etc. made within the spirit and principles in the present invention, should be included in the present invention
Claims within.
Claims (3)
1. the differential annealing method of an air-conditioning bearing inner sleeve, it is characterised in that comprise the following steps:
A, by bearing inner sleeve containing threaded portion use high frequency induction heater heating, high frequency induction heater lead to
Cross the periphery of circular heating tube parcel bearing inner sleeve, other of bearing inner sleeve are partly submerged in cooling water, high
Frequency sensing heater is heated to 700 DEG C～800 DEG C, is incubated 2 hours, and water temperature is maintained at 5 DEG C～15 DEG C；
B, again high frequency induction heater being heated to 850 DEG C～900 DEG C, be incubated 10 hours, water temperature is maintained at
5 DEG C～30 DEG C；
C, by bearing inner sleeve all put into cooling water in, cool down 2～3 hours；
D, again with high frequency induction heater by bearing inner sleeve containing threaded portion with 20 DEG C/h be heated to 800 DEG C～
850 DEG C, it is incubated 2～3 hours, then takes out air and be cooled to room temperature.
A kind of differential annealing method of air-conditioning bearing inner sleeve, it is characterised in that
Cooling water uses semiconductor chilling plate to cool down.
A kind of differential annealing method of air-conditioning bearing inner sleeve, it is characterised in that
Hardened and tempered off time is more than 1 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610368471.7A CN105925763A (en) | 2016-05-27 | 2016-05-27 | Local annealing method for air conditioner bearing lining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610368471.7A CN105925763A (en) | 2016-05-27 | 2016-05-27 | Local annealing method for air conditioner bearing lining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105925763A true CN105925763A (en) | 2016-09-07 |
Family
ID=56842416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610368471.7A Pending CN105925763A (en) | 2016-05-27 | 2016-05-27 | Local annealing method for air conditioner bearing lining |
Country Status (1)
| Country | Link |
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| CN (1) | CN105925763A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106834653A (en) * | 2017-02-23 | 2017-06-13 | 武汉理工大学 | A kind of bearing ring forging tissue fast spheroidizing annealing method based on controll cooling after forging |
| CN111270049A (en) * | 2020-04-21 | 2020-06-12 | 河南柴油机重工有限责任公司 | High-frequency heat treatment protection method for thin-wall hole shaft parts |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101428387A (en) * | 2008-12-10 | 2009-05-13 | 株洲齿轮有限责任公司 | Helix bevel gear active tooth threading machining process |
| CN103014302A (en) * | 2012-12-11 | 2013-04-03 | 中山市盈科轴承制造有限公司 | Partial annealing device and annealing method of bearing sleeve ring |
| CN105087894A (en) * | 2014-05-21 | 2015-11-25 | 山东久久星轴承有限公司 | Local heating treatment process of outer spherical ball bearing with jackscrew |
-
2016
- 2016-05-27 CN CN201610368471.7A patent/CN105925763A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101428387A (en) * | 2008-12-10 | 2009-05-13 | 株洲齿轮有限责任公司 | Helix bevel gear active tooth threading machining process |
| CN103014302A (en) * | 2012-12-11 | 2013-04-03 | 中山市盈科轴承制造有限公司 | Partial annealing device and annealing method of bearing sleeve ring |
| CN105087894A (en) * | 2014-05-21 | 2015-11-25 | 山东久久星轴承有限公司 | Local heating treatment process of outer spherical ball bearing with jackscrew |
Non-Patent Citations (1)
| Title |
|---|
| 田民波: "《材料学概论》", 31 August 2015, 北京：清华大学出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106834653A (en) * | 2017-02-23 | 2017-06-13 | 武汉理工大学 | A kind of bearing ring forging tissue fast spheroidizing annealing method based on controll cooling after forging |
| CN106834653B (en) * | 2017-02-23 | 2018-03-16 | 武汉理工大学 | A kind of bearing ring forging tissue fast spheroidizing annealing method based on controll cooling after forging |
| CN111270049A (en) * | 2020-04-21 | 2020-06-12 | 河南柴油机重工有限责任公司 | High-frequency heat treatment protection method for thin-wall hole shaft parts |
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20160907 |