CN105149876A - Machining process of air conditioner bearing cover - Google Patents

Machining process of air conditioner bearing cover Download PDF

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Publication number
CN105149876A
CN105149876A CN201510546598.9A CN201510546598A CN105149876A CN 105149876 A CN105149876 A CN 105149876A CN 201510546598 A CN201510546598 A CN 201510546598A CN 105149876 A CN105149876 A CN 105149876A
Authority
CN
China
Prior art keywords
temperature
blank
air
cover
housing
Prior art date
Application number
CN201510546598.9A
Other languages
Chinese (zh)
Inventor
龚双林
Original Assignee
安庆银亿轴承有限公司
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 安庆银亿轴承有限公司 filed Critical 安庆银亿轴承有限公司
Priority to CN201510546598.9A priority Critical patent/CN105149876A/en
Publication of CN105149876A publication Critical patent/CN105149876A/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18Hardening; Quenching with or without subsequent tempering
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/40Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races

Abstract

The invention discloses a machining process of an air conditioner bearing cover; the middle forging heating is added in the machining process, and the temperature is 1000 DEG C, so that the gradient temperature of steel parts is excessive to prevent the density reduction of the steel parts due to excessive temperature difference; the final forging heating temperature is 850 DEG C, and is convenient for subsequent blanking; the blank cooling mode adopts water cooling; the water cooling cools the blank rapidly, and provides a certain humidity for blank punching; the bearing cover is preheated at 75 DEG C before the annealing, so that the damage to the steel parts can be quickly and really prevented; a quenching medium is high-speed quenching oil ensures higher hardenability of the steel parts, and largely reduces the deformation of the steel parts; and the machining process is suitable for the quenching of alloy steel workpieces with complex shapes.

Description

A kind of processing technology of air-conditioning bearing outside
Technical field
The present invention relates to metal parts manufacture field, particularly relate to a kind of processing technology of air-conditioning bearing outside.
Background technology
Bearing ring is have one or several raceway centripetal rolling bearingring-shaped work pieces.Its manufacture process roughly comprises: forging: if produce burning in forging process, overheated, implosion reticulates toughness and the intensity that carbide etc. all can reduce lasso.So must radiating condition (as misting cooling) etc. after strict controlled working temperature, circulating-heating and forging all the time, particularly after larger kind lasso finish-forging, temperature, more than 700 DEG C, must not be piled up and put.Heat treatment: be one, workshop important process to Equipment for Heating Processing close supervision.The reliability of monitoring equipment.To the important temperature control utensil palpus such as instrument, thermocouple close supervision, guarantee that measurement data accurately and reliably; What exceed standard to error will change in time, forbids to run in spite of illness.The monitoring of grinding process.Finished product imported bearing lasso has not allowed that the mating surface of grinding burn and grinding crack existence, particularly inner ring screwdriver degree must not have burn.If should entirely examine after lasso pickling, pick out burn product, serious burn can not reprocess or reprocess underproof should scrapping, do not allow the lasso of grinding burn to enter assembly process.Identity management, after steel warehouse-in before lasso grinding, the necessary strict control of each operation, strictly distinguishes GCR15 and GCR15SIMN two kinds of unlike material materials and product.
Summary of the invention
A processing technology for air-conditioning bearing outside, is characterized in that, its step comprises:
(1) melting heating
Heat raw material, by heating raw materials to molten condition, the temperature of forging heating of beginning is: 1120-1150 DEG C, and the temperature of finish-forging heating is 850-900 DEG C;
(2) blanking
Raw material under molten condition is extruded cut-out from forcing press, and pour into cooling in mould and form blank, the pressure of use is 35.5-40MPa;
(3) punching
Punching on shaping blank, bore dia draws according to bearing diameter;
(4) anneal
Blank is heated to 750-770 DEG C, and insulation 1.5-2.5h, is then cooled to 600 DEG C;
(5) turning
Adopt raceway in method of forming car to carry out turning process to blank, turning process comprises bore hole, chamfering and end face processing;
(6) quench
Carry out Quenching Treatment to bearing holder (housing, cover), hardening heat is 820-846 DEG C;
(7) lonneal
After having quenched, at temperature is 150-250 DEG C, carry out lonneal, temperature keeps 1.5-2h;
(8) grinding machine processing
Grinding machine carries out processing process to bearing holder (housing, cover), and the rotating speed of bistrique is 3000-6000r/min;
(9) check
Test to bearing holder (housing, cover), certified products can be packaged as finished product;
Preferably, forging heating in increasing in step (1), temperature is 1000 DEG C.
Preferably, in step (1), the temperature of finish-forging heating is 850 DEG C.
Preferably, what the type of cooling of the middle blank of step (2) adopted is water-cooled.
Preferably, first carry out preheating to bearing holder (housing, cover) before step (4) annealing, temperature is 75 DEG C.
Preferably, the medium that step (6) is quenched is fast quench oil.
Beneficial effect: the processing technology that the invention provides a kind of air-conditioning bearing outside, forging heating in increasing in process, temperature is 1000 DEG C, makes steel part gradient temperature excessive like this, prevents the excessive steel part density that makes of temperature difference from declining; The temperature of finish-forging heating is 850 DEG C, is convenient to ensuing blanking at this temperature; What the type of cooling of blank adopted is water-cooled, and water-cooled can realize blank cooling fast, provides certain humidity of blank during punching simultaneously; First carry out preheating to bearing holder (housing, cover) before annealing, temperature is 75 DEG C, can prevent from so really causing damage to steel part fast; The medium of quenching is fast quench oil, and this hardening media can obtain quenching degree and the hardenability of higher steel part, greatly reduces again steel part distortion, is applicable to the quenching of complex-shaped alloyed steel work-piece.
Detailed description of the invention
The technological means realized for making the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with detailed description of the invention, setting forth the present invention further.
Embodiment 1:
A processing technology for air-conditioning bearing outside, is characterized in that, its step comprises:
(1) melting heating
Heat raw material, by heating raw materials to molten condition, the temperature of forging heating of beginning is 1120 DEG C, middle forging heating, and temperature is the temperature of 1000 DEG C of finish-forging heating is 850 DEG C;
(2) blanking
Raw material under molten condition is extruded cut-out from forcing press, to pour in mould cooling and form blank, what the type of cooling of blank adopted is water-cooled, and the pressure of use is 35.5MPa;
(3) punching
Punching on shaping blank, bore dia draws according to bearing diameter;
(4) anneal
First carry out preheating to bearing holder (housing, cover) before annealing, temperature is 75 DEG C, blank is heated to 750 DEG C, and insulation 1.5h, is then cooled to 600 DEG C;
(5) turning
Adopt raceway in method of forming car to carry out turning process to blank, turning process comprises bore hole, chamfering and end face processing;
(6) quench
Carry out Quenching Treatment to bearing holder (housing, cover), the medium of quenching is fast quench oil, and hardening heat is 820 DEG C;
(7) lonneal
After having quenched, at temperature is 150 DEG C, carry out lonneal, temperature keeps 1.5h;
(8) grinding machine processing
Grinding machine carries out processing process to bearing holder (housing, cover), and the rotating speed of bistrique is 3000r/min;
(9) check
Test to bearing holder (housing, cover), certified products can be packaged as finished product;
Embodiment 2:
A processing technology for air-conditioning bearing outside, is characterized in that, its step comprises:
(1) melting heating
Heat raw material, by heating raw materials to molten condition, the temperature of forging heating of beginning is 1140 DEG C, middle forging heating, and temperature is 1000 DEG C, and the temperature of finish-forging heating is 850 DEG C;
(2) blanking
Raw material under molten condition is extruded cut-out from forcing press, to pour in mould cooling and form blank, what the type of cooling of blank adopted is water-cooled, and the pressure of use is 38MPa;
(3) punching
Punching on shaping blank, bore dia draws according to bearing diameter;
(4) anneal
First carry out preheating to bearing holder (housing, cover) before annealing, temperature is 75 DEG C, blank is heated to 750 DEG C, and insulation 2h, is then cooled to 600 DEG C;
(5) turning
Adopt raceway in method of forming car to carry out turning process to blank, turning process comprises bore hole, chamfering and end face processing;
(6) quench
Carry out Quenching Treatment to bearing holder (housing, cover), the medium of quenching is fast quench oil, and hardening heat is 830 DEG C;
(7) lonneal
After having quenched, at temperature is 200 DEG C, carry out lonneal, temperature keeps 1.5h;
(8) grinding machine processing
Grinding machine carries out processing process to bearing holder (housing, cover), and the rotating speed of bistrique is 4000r/min;
(9) check
Test to bearing holder (housing, cover), certified products can be packaged as finished product;
Embodiment 3:
A processing technology for air-conditioning bearing outside, is characterized in that, its step comprises:
(1) melting heating
Heat raw material, by heating raw materials to molten condition, the temperature of forging heating of beginning is 1150 DEG C, middle forging heating, and temperature is 1000 DEG C, and the temperature of finish-forging heating is 850 DEG C;
(2) blanking
Raw material under molten condition is extruded cut-out from forcing press, to pour in mould cooling and form blank, what the type of cooling of blank adopted is water-cooled, and the pressure of use is 40MPa;
(3) punching
Punching on shaping blank, bore dia draws according to bearing diameter;
(4) anneal
First carry out preheating to bearing holder (housing, cover) before annealing, temperature is 75 DEG C, blank is heated to 770 DEG C, and insulation 2.5h, is then cooled to 600 DEG C;
(5) turning
Adopt raceway in method of forming car to carry out turning process to blank, turning process comprises bore hole, chamfering and end face processing;
(6) quench
Carry out Quenching Treatment to bearing holder (housing, cover), the medium of quenching is fast quench oil, and hardening heat is 846 DEG C;
(7) lonneal
After having quenched, at temperature is 250 DEG C, carry out lonneal, temperature keeps 2h;
(8) grinding machine processing
Grinding machine carries out processing process to bearing holder (housing, cover), and the rotating speed of bistrique is 6000r/min;
(9) check
Test to bearing holder (housing, cover), certified products can be packaged as finished product;
Thickness deviation Glossiness Drag Hardness
Embodiment 1 ≤0.5mm ≥110% ≤68KN 10 grades
Embodiment 2 ≤0.3mm ≥120% ≤72KN 10 grades
Embodiment 3 ≤0.7mm ≥110% ≤61KN 10 grades
Prior art standard ≤1mm ≥100% ≤50KN 9 grades
Can draw according to above table data, when implementing embodiment 2 parameter, obtain air-conditioning bearing holder (housing, cover), its thickness deviation is less than or equal to 0.5mm, and glossiness is more than or equal to 120%, and drag reaches 72KN, hardness reaches 10 grades, and its thickness deviation of prior art standard is less than or equal to 1mm, glossiness is more than or equal to 100%, and drag is maximum reaches 50KN, hardness only reaches 9 grades, and in contrast the present invention has significant superiority.
The invention provides a kind of processing technology of air-conditioning bearing outside, forging heating in increasing in process, temperature is 1000 DEG C, makes steel part gradient temperature excessive like this, prevents the excessive steel part density that makes of temperature difference from declining; The temperature of finish-forging heating is 850 DEG C, is convenient to ensuing blanking at this temperature; What the type of cooling of blank adopted is water-cooled, and water-cooled can realize blank cooling fast, provides certain humidity of blank during punching simultaneously; First carry out preheating to bearing holder (housing, cover) before annealing, temperature is 75 DEG C, can prevent from so really causing damage to steel part fast; The medium of quenching is fast quench oil, and this hardening media can obtain quenching degree and the hardenability of higher steel part, greatly reduces again steel part distortion, is applicable to the quenching of complex-shaped alloyed steel work-piece.
Obvious specific implementation of the present invention is not subject to the restrictions described above; as long as have employed the improvement of the various unsubstantialities that method of the present invention is conceived and technical scheme is carried out; or design of the present invention and technical scheme directly applied to other occasion, all within protection scope of the present invention without to improve.

Claims (6)

1. a processing technology for air-conditioning bearing outside, is characterized in that, its step comprises:
(1) melting heating
Heat raw material, by heating raw materials to molten condition, the temperature of forging heating of beginning is: 1120-1150 DEG C, and the temperature of finish-forging heating is 850-900 DEG C;
(2) blanking
Raw material under molten condition is extruded cut-out from forcing press, and pour into cooling in mould and form blank, the pressure of use is 35.5-40MPa;
(3) punching
Punching on shaping blank, bore dia draws according to bearing diameter;
(4) anneal
Blank is heated to 750-770 DEG C, and insulation 1.5-2.5h, is then cooled to 600 DEG C;
(5) turning
Adopt raceway in method of forming car to carry out turning process to blank, turning process comprises bore hole, chamfering and end face processing;
(6) quench
Carry out Quenching Treatment to bearing holder (housing, cover), hardening heat is 820-846 DEG C;
(7) lonneal
After having quenched, at temperature is 150-250 DEG C, carry out lonneal, temperature keeps 1.5-2h;
(8) grinding machine processing
Grinding machine carries out processing process to bearing holder (housing, cover), and the rotating speed of bistrique is 3000-6000r/min;
(9) check
Test to bearing holder (housing, cover), certified products can be packaged as finished product.
2. a processing technology for air-conditioning bearing outside according to claim 1, is characterized in that, forging heating in increasing in step (1), temperature is 1000 DEG C.
3. a processing technology for air-conditioning bearing outside according to claim 1, is characterized in that, in step (1), the temperature of finish-forging heating is 850 DEG C.
4. a processing technology for air-conditioning bearing outside according to claim 1, is characterized in that, what in step (2), the type of cooling of blank adopted is water-cooled.
5. a processing technology for air-conditioning bearing outside according to claim 1, is characterized in that, first carry out preheating to bearing holder (housing, cover) before step (4) annealing, temperature is 75 DEG C.
6. a processing technology for air-conditioning bearing outside according to claim 1, is characterized in that, the medium that step (6) is quenched is fast quench oil.
CN201510546598.9A 2015-08-31 2015-08-31 Machining process of air conditioner bearing cover CN105149876A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Publications (1)

Publication Number Publication Date
CN105149876A true CN105149876A (en) 2015-12-16

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105950831A (en) * 2016-05-27 2016-09-21 安庆银亿轴承有限公司 Heat treatment method of thin-wall air conditioner bearing outer sleeve
CN110977346A (en) * 2019-12-10 2020-04-10 苏州工业园区科海机电工程有限公司 Steel product processing technology

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101576123A (en) * 2008-05-09 2009-11-11 嵊州市美亚特种轴承厂 Process for manufacturing bearing ring
CN101718305A (en) * 2009-12-14 2010-06-02 佛山市顺德区冠邦科技有限公司 Method and equipment for manufacturing bearing ferrule
CN101947630A (en) * 2010-09-17 2011-01-19 洛阳轴研科技股份有限公司 Controlled-forging controlled-cooling processing technology of bearing ring prepared by GCr15
CN101992395A (en) * 2009-08-20 2011-03-30 袁洁 Machining-shaping process of bearing ring
CN102029351A (en) * 2010-12-14 2011-04-27 重庆长征重工有限责任公司 Method for manufacturing wind power forging by using 20CrMnMo continuous casting blank
CN104827245A (en) * 2015-02-03 2015-08-12 江苏金源锻造股份有限公司 Forging process of bearing ring

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101576123A (en) * 2008-05-09 2009-11-11 嵊州市美亚特种轴承厂 Process for manufacturing bearing ring
CN101992395A (en) * 2009-08-20 2011-03-30 袁洁 Machining-shaping process of bearing ring
CN101718305A (en) * 2009-12-14 2010-06-02 佛山市顺德区冠邦科技有限公司 Method and equipment for manufacturing bearing ferrule
CN101947630A (en) * 2010-09-17 2011-01-19 洛阳轴研科技股份有限公司 Controlled-forging controlled-cooling processing technology of bearing ring prepared by GCr15
CN102029351A (en) * 2010-12-14 2011-04-27 重庆长征重工有限责任公司 Method for manufacturing wind power forging by using 20CrMnMo continuous casting blank
CN104827245A (en) * 2015-02-03 2015-08-12 江苏金源锻造股份有限公司 Forging process of bearing ring

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105950831A (en) * 2016-05-27 2016-09-21 安庆银亿轴承有限公司 Heat treatment method of thin-wall air conditioner bearing outer sleeve
CN110977346A (en) * 2019-12-10 2020-04-10 苏州工业园区科海机电工程有限公司 Steel product processing technology

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Application publication date: 20151216