CN106119473B - Fork shaft movement heating immersion oil flash quenching method - Google Patents
Fork shaft movement heating immersion oil flash quenching method Download PDFInfo
- Publication number
- CN106119473B CN106119473B CN201610739225.8A CN201610739225A CN106119473B CN 106119473 B CN106119473 B CN 106119473B CN 201610739225 A CN201610739225 A CN 201610739225A CN 106119473 B CN106119473 B CN 106119473B
- Authority
- CN
- China
- Prior art keywords
- quenching
- fork shaft
- inducer
- injection loop
- tank
- 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.)
- Active
Links
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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/28—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for plain shafts
-
- 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
- C21D1/62—Quenching devices
- C21D1/63—Quenching devices for bath quenching
-
- 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
- C21D1/62—Quenching devices
- C21D1/667—Quenching devices for spray quenching
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a kind of fork shafts to move heating immersion oil flash quenching method, and in quenching oil ullage sensing heating, do not cool down the flash quenching under oil rapidly, that is, heats and cool down the quenching technical to combine together.The quench-hardened case that thickness is suitable, is reasonably distributed can be obtained, wear-resisting, fatigue resistance is improved, and thoroughly solves the inertial mass problem of crackle.
Description
Technical field
The present invention relates to metal heat treatmet fields.
Background technology
Fork shaft is one of important part on locomotive, and for transferring torque, operating condition is severe for it, it is desirable that is had high wear-resisting
Property, high fatigue strength and anti-brittle break ability, early stage once designed the medium-sized spline of shallow slot, fatigue equivalent occurs and fracture is existing
As later improved structure designs wrinkling heavy type spline, and keyway number increases to 16 by 6, and groove depth is increased to by 7 millimeters
8.5 millimeters, such bearing capacity improves, but brings crack problem to mid frequency induction hardening.To solve this long-term inertia mass
Problem, we once carry out polyvinyl alcohol medium frequency induction hardening process experiment improvement, but cannot thoroughly eliminate hardening flaw and make fork shaft
Scrap problem.
My company is just using the method for intermediate frequency movement heating spray polyvinyl alcohol quenching at present, my company's medium frequency electric generating unit frequency
F=8000HZ, by formula f it is optimal=250/m2KHZ, m is equivalent to 3.5 here, therefore device frequency is relatively low in optimum frequency, this
Sample root heating temperature is higher than top heating temperature, since polyvinyl alcohol applies the quenching property on steel alloy Complex Parts unstable
Fixed, the quenching stress so generated in the high root of hardening heat is more than top quenching stress, therefore crackle is big in stress first
Root generate, and to top wedge angle extend.Because it is rotary heating quenching, therefore keyway one side contacts directly coolant,
Cooling rate is higher than opposite side, and the probability that so fast cooling one side crackle occurs is more than opposite side certainly.Though through various technique adjustments
It improves, crack number is reduced, but hardening flaw cannot be eradicated.
The content of the invention
Technical problem solved by the invention is to provide a kind of fork shaft movement heating immersion oil flash quenching method,
The technical solution adopted by the present invention is that fork shaft movement heating immersion oil flash quenching method includes quenching using equipment
Fiery slot, quenching inducer is equipped on quenching tank, and quenching inducer is fixed on induction hardening transformer, quenching sense by middle transition plate
The lower face of the inducing conductor of device is answered to be connected by brass screw, bakelite block with injection loop in state of insulation, injection loop 7 soaks
Enter below liquid level, one group of nozzle opening is bored on the circumference of injection loop, quenching tank is equipped at least twice overflow launder, the face of overflow launder
Product is more than the area of injection loop, further includes the shifting axle of vertical direction, and fork shaft to be processed is fixed on shifting axle；
Fork shaft to be processed from top to bottom passes through the central through hole of quenching inducer, quenching sensing under the drive of shifting axle
Device energization is located at the part in inducing conductor to fork shaft and heats, and fork shaft gradually moves down and lower end is first gradually immersed into quenching
Slot is quenched, and nozzle opening carries out oil spout and promotes liquid flowing in quenching tank；Fork shaft persistently moves down, heat with quenching simultaneously into
Row, until fork shaft is completely into quenching tank.
The quenching inducer is higher than quenching oil level 10mm-20mm.
Inducing conductor leads to cooling circulating water, to ensure the cooling of quenching inducer in heating process.
The invention has the advantages that using the fork shaft of movement heating immersion oil flash quenching method quenching, can obtain
The quench-hardened case that thickness is suitable, is reasonably distributed is obtained, improves wear-resisting, fatigue resistance, and the inertia mass for thoroughly solving crackle is asked
Topic.
Description of the drawings
Fig. 1 is fork shaft structure chart.
Fig. 2 is schematic structural view of the invention.
Fig. 3 is injection loop structure chart.
In figure mark for：1- quenching inducers, 2- shifting axles, 3- induction hardening transformers, 4- inducing conductors, 7- injection loops, 71-
Nozzle opening, 8- quenching tanks, 9- fork shafts.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.
What patent of the present invention was realized in：Sensing heating is carried out in quenching oil ullage, does not cool down, moves down into rapidly
The lower flash quenching of oil, that is, heat and cool down the quenching technical for combining together and synchronously carrying out.
Quenching inducer 1 is connected by middle transition plate with induction hardening transformer 3, and quenching inducer 1 is fixed on quenching
Certain altitude above slot.The lower face of the inducing conductor 4 of inductor is by brass screw, bakelite block and injection loop 7 in insulation shape
State is connected, and inducing conductor 4 leads to cooling circulating water, to ensure the cooling of inductor in heating process；7 immersed in liquid level of injection loop
Hereinafter, a certain number of nozzle openings 71 are bored on the circumference of injection loop 7 and spray oil, accelerate the cycling of quenching oil, to improve workpiece
It that is to say the cooling velocity and cooling uniformity of fork shaft 9.A plurality of long slit overflow launder, the overflow launder are designed on quenching tank 8
Area be far longer than the area of injection loop, therefore fuel head remains in heating quenching process and mixes up fixed height in advance
Degree, this ensure that quenching quality.The lower face of quenching inducer 1 and the accurate positionin of pasta are very important, if oily
Face rise enters in inductor, influences heating effect；If pasta reduction makes workpiece enter the time lengthening of injection loop, make quenching
Temperature reduces too much, influences quenching effect.
The fork shaft movement heating immersion oil flash quenching method of the present invention, in quenching oil ullage sensing heating, does not drop
The quenching technical to combine together is heated and cooled down in the warm flash quenching under oil rapidly.It can obtain that thickness is suitable, is reasonably distributed
Quench-hardened case, improve wear-resisting, fatigue resistance, and thoroughly solve the inertial mass problem of crackle.
Claims (1)
1. fork shaft movement heating immersion oil flash quenching method, includes quenching tank using equipment, quenching sense is equipped on quenching tank
Answer device（1）, quenching inducer（1）Induction hardening transformer is fixed on by middle transition plate（3）, quenching inducer（1）Inducing lead
Body（4）Lower face pass through brass screw, bakelite block and injection loop（7）It is connected in state of insulation, injection loop（7）Immerse liquid
Below face, injection loop（7）Circumference on bore one group of nozzle opening（71）, quenching tank（8）It is equipped at least twice overflow launder, overflow
The area of slot is more than the area of injection loop, further includes the shifting axle of vertical direction（2）, fork shaft to be processed（9）It is fixed on movement
Axis（2）On；
In shifting axle（2）Drive under fork shaft to be processed（9）From top to bottom pass through quenching inducer（ 1）Central through hole,
Quenching inducer（1）It is powered to fork shaft（9）Positioned at inducing conductor（4）Interior part is heated, fork shaft（9）Gradually move down
And lower end is first gradually immersed into quenching tank and is quenched, nozzle opening carries out oil spout and promotes liquid flowing in quenching tank；Fork shaft（9）It holds
Continuous to move down, heating is carried out at the same time with quenching, until fork shaft（9）Completely into quenching tank；
Inducing conductor（4）Logical cooling circulating water, to ensure quenching inducer in heating process（1）Cooling；
The quenching inducer（1）Higher than quenching oil level 10mm-20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610739225.8A CN106119473B (en) | 2016-08-28 | 2016-08-28 | Fork shaft movement heating immersion oil flash quenching method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610739225.8A CN106119473B (en) | 2016-08-28 | 2016-08-28 | Fork shaft movement heating immersion oil flash quenching method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106119473A CN106119473A (en) | 2016-11-16 |
| CN106119473B true CN106119473B (en) | 2018-06-05 |
Family
ID=57274775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610739225.8A Active CN106119473B (en) | 2016-08-28 | 2016-08-28 | Fork shaft movement heating immersion oil flash quenching method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106119473B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4226052B1 (en) * | 2007-12-14 | 2009-02-18 | 株式会社ナガト | Induction hardening method in oil |
| CN102965480A (en) * | 2012-11-16 | 2013-03-13 | 上海交通大学 | Method and equipment for quenching and cooling thick-walled steel pipe |
| CN103074470A (en) * | 2013-01-18 | 2013-05-01 | 万向钱潮传动轴有限公司 | Surface quenching sensor of small-diameter internal spline |
| CN103667661A (en) * | 2013-11-29 | 2014-03-26 | 第一拖拉机股份有限公司 | Inductive heat treatment method of low-speed large-torque drive axle |
| CN104109739A (en) * | 2014-07-28 | 2014-10-22 | 常熟华威履带有限公司 | Novel induction quenching device of guide wheel of hydraulic excavator and quenching method of novel induction quenching device |
| US9347110B2 (en) * | 2013-05-01 | 2016-05-24 | The Lund Industrial Group | Press quench machine |
-
2016
- 2016-08-28 CN CN201610739225.8A patent/CN106119473B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4226052B1 (en) * | 2007-12-14 | 2009-02-18 | 株式会社ナガト | Induction hardening method in oil |
| CN102965480A (en) * | 2012-11-16 | 2013-03-13 | 上海交通大学 | Method and equipment for quenching and cooling thick-walled steel pipe |
| CN103074470A (en) * | 2013-01-18 | 2013-05-01 | 万向钱潮传动轴有限公司 | Surface quenching sensor of small-diameter internal spline |
| US9347110B2 (en) * | 2013-05-01 | 2016-05-24 | The Lund Industrial Group | Press quench machine |
| CN103667661A (en) * | 2013-11-29 | 2014-03-26 | 第一拖拉机股份有限公司 | Inductive heat treatment method of low-speed large-torque drive axle |
| CN104109739A (en) * | 2014-07-28 | 2014-10-22 | 常熟华威履带有限公司 | Novel induction quenching device of guide wheel of hydraulic excavator and quenching method of novel induction quenching device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106119473A (en) | 2016-11-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3628752B1 (en) | Quenching heat treatment device and on-line intelligent control method for the cooling characteristics of quenching liquid | |
| Belkin et al. | Plasma electrolytic hardening of steels | |
| CN102605145B (en) | Steel isothermal quenching-tempering cooling technology | |
| CN102925655B (en) | Thermal treatment method of cam shaft | |
| FI77695B (en) | FOERFARANDE OCH ANORDNING FOER INDUKTIONSHAERDNING AV KUGGARNA PAO ETT KUGGHJUL. | |
| CN104694865A (en) | Electric pulse regression treatment method for aluminum alloy | |
| CN108467936A (en) | A kind of automatic heat treatment system of stainless steel | |
| CN106119473B (en) | Fork shaft movement heating immersion oil flash quenching method | |
| CN104357622B (en) | A kind of high-strength alloy steel carburizing product local softening method | |
| CN103074470A (en) | Surface quenching sensor of small-diameter internal spline | |
| CN101948943A (en) | Mold surface quenching device and method | |
| CN104419815A (en) | Induction tempering technology for shaft parts and inductor | |
| CN203159668U (en) | Small-diameter internal spline surface quenching inductor | |
| CN212504971U (en) | Induction heating device for quenching tooth surface of large-diameter gear | |
| CN204918679U (en) | Medium temperature homogenization guenching unit | |
| CN107858498A (en) | Axial workpiece hardening apparatus by high frequency current | |
| CN106367564A (en) | Leaf spring single-surface medium-frequency quenching process and sensor thereof | |
| CN103627880B (en) | Modulus is in the mid-frequency induction hardening technique of the heavily loaded tooth bar of 50mm≤m≤150mm | |
| CN205874501U (en) | Excavator thrust wheel support roll way induction heating of portion frock | |
| CN105986115A (en) | Control method for cooling process of heat treatment | |
| CN102787219A (en) | Induction quenching method for controlling magnetic flux leakage of workpiece groove by coating magnetizer | |
| CN219117503U (en) | T iron heating device | |
| CN220012735U (en) | Gear machining stable quenching device | |
| CN219547012U (en) | Quenching device | |
| CN202688387U (en) | Novel quenching device applied to medium-carbon alloy steel workpiece |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |