CN103290181A - Supersonic gas (fog) scanning quenching nozzle - Google Patents
Supersonic gas (fog) scanning quenching nozzle Download PDFInfo
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- CN103290181A CN103290181A CN2013102627037A CN201310262703A CN103290181A CN 103290181 A CN103290181 A CN 103290181A CN 2013102627037 A CN2013102627037 A CN 2013102627037A CN 201310262703 A CN201310262703 A CN 201310262703A CN 103290181 A CN103290181 A CN 103290181A
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Abstract
The invention provides a supersonic gas (fog) scanning quenching nozzle, wherein the nozzle is sequentially connected with an air inlet pipe, an air inlet electromagnetic valve and a compressed air interface; a water injection pipe at the upper end of the air inlet pipe is connected with a piston type metering pump body, the piston of the piston type metering pump body is connected with a ball screw, a planetary reducer and a servo motor, and the upper end of the piston type metering pump body is connected with a water storage electromagnetic valve and a water accumulator. A quenching medium with instantly adjustable cooling speed is formed by compressed air and water mist to realize individual quenching of a gear surface, a new induction quenching technique with an ultrahigh cooling speed (the workpiece cooling speed is as high as 1000 DEG C) and an air flow speed of about 300-500 m/s is further created to reduce heat treatment deformation and obtain ultrahigh hardness, and an environment-friendly working target of zero environmental pollution and non-cleaning of gear induction heating quenching is realized.
Description
Technical field
The invention belongs to the Equipment for Heating Processing field.Be particularly related to a kind of supersonic gas (mist) scanning quenching nozzle.
Background technology
Gear induction quenching of the prior art mainly adopts liquid quenching medium.Gear for once heating adopts spray quenching, adopts spray quenching for the carbon steel gear, adopts water spray basic hardening liquid, i.e. PAG water-based quenching medium for the steel alloy gear.The concentration of water-based hardening liquid will namely be regulated according to the through hardening performance of steel according to the alloy element component of material.Concentration to the high material hardening liquid of hardening capacity is high denseer, otherwise then low.Also can adopt the higher gear of some alloying element and to be transferred to that oil groove quenches or embedding oil quenching.Above-mentioned traditional quenching technology gear final cooling temperature be owing to can not observe the actual process of cooling of workpiece, thus generally all be cooled to below 100 ℃, till namely water does not evaporate.Workpiece often will be cooled to below 70 ℃ when using the PAG hardening liquid, because this moment, quenchant can dissolve in the water again again.Can save quenchant like this, the workpiece of the oil groove of quenching treats that oily missing of ignition on the workpiece can stop quenching, and is still emitting dense oil smoke after this moment, workpiece went out groove, and environment is also polluted.In a word, the induction quenching process of gear be so far one inconsiderable, can not survey uncontrollable blind area.And the cooling performance of quenchant not only is subjected to the influence of its concentration, and be subjected to the influence of oil product and various additive ageing of performance, this just need detect the cooling performance curve of quenchant on schedule and be regulated, but is not easy to regulate at random by the actual requirement of workpiece.
The ultimate aim of thermal treatment phase transformation strengthening is the phase-change product of workpiece, is a kind of indirect means and regulate the quenchant performance, can not reach the ideal quenching result.On the other hand, the size of workpiece, modulus, shape service condition, estimated performance etc. vary, and the performance one that guarantee a collection of workpiece is made peace and realized the personalized quenching effect of various gears, and obviously this is that prior art is unapproachable.
Along with the development of advancing by leaps and bounds of contemporary Power Electronic Technique, the breakthrough of matter is taking place in the performance of induction heating power, but this shows the raising of induction heating equipment technology.And second half technology of induction heat treatment is exactly cooling technology, and this technology relates to the core of thermal treatment phase transformation, and this technology will influence shape, distribution and the microtexture form of martensite quenched zone, and phase-change product is only final the pursuing one's goal of thermal treatment.
In sum, innovation gear induction quenching technology and lathe are another importances of development gear induction heat treatment.Oil-quenched another shortcoming of the spray quenching that gear induction quenching of the prior art adopts and Dip is exactly the pollution to environment, be that PAG hardening liquid or quenching oil all must be cleaned just and can change the tempering order over to, this will consume energy again, and the sewage that thermal treatment produces is not generally all done the cleaningization processing, and directly entering sink drainage, the environmental pollution that causes thus can not be ignored.
Vacuum heat treatment furnace has the type of furnace of carrying out high pressure, high flow-rate gas quenching in the prior art, and the scope of application of this technology and gear induced surface hardening involved in the present invention is then completely different.The power of the gas quenching of vacuum heat treatment is from high-power centrifugal blower, it uses gaseous media to be high purity nitrogen or helium, the gaseous tension that its uses is up to 20～40bar, as in the induction quenching that this quenching method is applied to gear then without any technology and economic worth.The induction quenching of gear requires workpiece must not surpass 2 seconds from the cooling time of austenitizing Heating temperature to 650 ℃, then require 0.5 second to carbon steel.In a word, the gas quenching technology of vacuum heat treatment then is not suitable for the induction quenching of gear in the prior art.
Be a brand-new technology field with compressed air quenching, this is that a kind of imagination there is no example before this.Because cooling and quenching are two far different things.Because the gear induction quenching is zero heat preservation method, stabilization of austenite is relatively poor, and in initial development, even if structural alloy steel adopts pressurized air also to quench and do not get angry, the hardness of 30HRC also can not get sometimes.In addition, compressed-air actuated acquisition also is a power consumption engineering, and as can not be in technology and doulbe-sides' victory economically, this technology have practical value yet so.
The content of invention
The object of the present invention is to provide a kind of supersonic gas (mist) scanning quenching nozzle.It is visual to be used for creating the omnidistance temperature of gear induction quenching, can survey, controlled heat treating method and lathe, the present invention also aims to form the instantaneous adjustable quenchant of a kind of rate of cooling with pressurized air and water smoke, thereby realize the personalized quenching of gear surface, (speed of cooling reaches 1 to the present invention also aims to create a kind of supersonic speed, 000 ℃/s, gas velocity reaches ≈ 300～500 meter per seconds) the induction quenching novel process, in the hope of reducing heat treatment deformation and obtaining ultrahigh hardness, the present invention also aims to realize the zero environmental of gear induction quenching, the green operative goals of exempting to clean.
Content of the present invention
A kind of supersonic gas (mist) scanning quenching nozzle is characterized in that: a taper nozzle 2, and the nozzle upper end is tuyere 1, mixing section 3 is arranged in the nozzle, the nozzle lower end connects inlet pipe 4, and the inlet pipe lower end is provided with air inlet magnetic valve 5, and the air inlet magnetic valve connects pressurized air interface 6; Inlet pipe 4 upper lateral parts connect water injection pipe 16, water injection pipe 16 lower ends connect water injecting electromagnetic valve 15, water injecting electromagnetic valve 15 connects the piston-type water measurement pump housing 7, in the piston-type water measurement pump housing 7 piston 9 is arranged, nut 8 is equipped with in piston 9 inside, nut 8 is connected with ball-screw 10, and ball-screw 10 lower ends connect planetary reducer 11, and planetary reducer 11 connects servomotor 12; There is retaining magnetic valve 13 the piston-type water measurement pump housing 7 upper ends, and the piston-type water measurement pump housing 7 connects accumulator 14.
More than Fa Ming innovative point is summarized as follows:
(1) supersonic gas (mist) scanning quenching nozzle is brand-new handy gear induction quenching instrument of heat treatment industry, and obtain unprecedented hardness uniformly, at the hardness value difference≤0.5HRC of a gear different sites, this is that any traditional quenching method can not be realized.
(2) supersonic gas (mist) is the instantaneous adjustable green quenchant of a kind of brand-new speed of cooling, this compressed-air actuated thermal capacity that contains minor amount of water substantially exceeds the thermal capacity of hydrogen, thereby improve compressed-air actuated cooling power, and the consumption of save compressed air, and compare hydric safe.Its speed of cooling not only can cover water, oil and the range of application of water-based quenching medium, and also its speed of cooling also can rise to more than 1000 ℃/second, and this will open up the new technology category of induction heat treatment.
Description of drawings
Accompanying drawing 1 is supersonic gas (mist) nozzle structural representation.
Among the figure: 1 tuyere, 2 nozzles, 3 mixing sections, 4 inlet pipe, 5 air inlet magnetic valves, 6 pressurized air interfaces, the 7 piston-type measurement pump housings, 8 nuts, 9 pistons, 10 ball-screws, 11 planetary reducers, 12 servomotors, 13 retaining magnetic valves, 14 accumulators, 15 water injecting electromagnetic valves, 16 water injection pipes.
Embodiment
Below in conjunction with accompanying drawing content of the present invention is elaborated.
A kind of supersonic gas (mist) scanning quenching nozzle, a taper nozzle 2, the nozzle upper end is tuyere 1, and mixing section 3 is arranged in the nozzle, and the nozzle lower end connects inlet pipe 4, and the inlet pipe lower end is provided with air inlet magnetic valve 5, and the air inlet magnetic valve connects pressurized air interface 6; Inlet pipe 4 upper lateral parts connect water injection pipe 16, water injection pipe 16 lower ends connect water injecting electromagnetic valve 15, water injecting electromagnetic valve 15 connects the piston-type water measurement pump housing 7, in the piston-type water measurement pump housing 7 piston 9 is arranged, nut 8 is equipped with in piston 9 inside, nut 8 is connected with ball-screw 10, and ball-screw 10 lower ends connect planetary reducer 11, and planetary reducer 11 connects servomotor 12; There is retaining magnetic valve 13 the piston-type water measurement pump housing 7 upper ends, and the piston-type water measurement pump housing 7 connects accumulator 14.
Supersonic gas (mist) scanning quenching nozzle
This nozzle is that main body is the cavity that has 30 ° of interior angles, the front end of cavity is tuyere, and the length of tuyere is the facewidth+2mm, and the seam of tuyere is wide to be 0.3～0.8mm, the cavity rear end has pipe screw joint can connect pressurized air and water route, and the water route is 30 ° with steam line and is connected.Pressurized air enters the nozzle cavity by gas pipe line during quenching, and by the ejection of tuyere slabbing, (0.6～1.0MPa) realizes the variation of the gas velocity of ejection by adjusting compressed-air actuated intake pressure after the cone-shaped cavity supercharging.Described above is jet quenching, improves speed of cooling as need and then opens water-supply line.For the cooling rate of accurately controlling confluent and repeating to spray, way of supplying water of the present invention is that every nozzle all disposes a piston-type water measurement pump separately.Volume pump is by the pump housing, piston, Miniature ball lead screw pair, and AC servo motor and magnetic valve are formed.When needs supplied water, servomotor was finished rotation in 300～500 milliseconds, and piston is at leading screw, the segment distance that advances under the promotion of nut, its piston surface area (square centimeter) and piston linear travel distance (centimetre) product be service discharge.Nozzle is a kind of accurate annex, and it will guarantee that the jet amount of every nozzle is fully consistent with water content in the mist.When the water in the piston pump is about to when finishing, water supply electromagnetic valve is closed.The retaining magnetic valve is opened, and this moment, piston returned start bit, and water is by being inhaled into piston pump in the water tank, then the retaining closed electromagnetic valve.Everything action is all finished by predefined program, and all programs can be set at touch-screen again, revises and additions and deletions.Said mechanism can require implement jet quenching, fog quenching according to the quenching of workpiece, jet-spraying-jet quenching, jet-water spray-as to spray-multiple quenching mode such as jet.And the quality of quenching process must can be finalized the design after the analysis of metallographic and Electronic Speculum.These actions must be finished rapidly to the Ms point in work-piece cools, when workpiece surface was cooled near the Ms point, the nozzle action of quenching namely finished, and workpiece is known from experience spontaneous finishing at remaining temperature Xia Mashi, this has just been avoided adding up of thermal stresses and structural stress, thereby has avoided the formation of quenching crack.This quenching mode does not produce soft spots, and quenching hardness is very even.
The present invention is under the guidance of the T-T-T curve at material, and organically links up with workpiece quenching practice, thereby makes the heat treatment operation under the working condition more scientific and reasonable, and thermal treatment quality is risen to higher level.
Claims (1)
1. a supersonic gas (mist) scans the quenching nozzle, it is characterized in that: a taper nozzle (2), the nozzle upper end is tuyere (1), mixing section (3) is arranged in the nozzle, the nozzle lower end connects inlet pipe (4), the inlet pipe lower end is provided with air inlet magnetic valve (5), and the air inlet magnetic valve connects pressurized air interface (6); Inlet pipe (4) upper lateral part connects water injection pipe (16), water injection pipe (16) lower end connects water injecting electromagnetic valve (15), water injecting electromagnetic valve (15) connects the piston-type water measurement pump housing (7), piston (9) is arranged in the piston-type water measurement pump housing (7), nut (8) is equipped with in piston (9) inside, nut (8) is connected with ball-screw (10), and ball-screw (10) lower end connects planetary reducer (11), and planetary reducer (11) connects servomotor (12); There is retaining magnetic valve (13) the piston-type water measurement pump housing (7) upper end, and the piston-type water measurement pump housing (7) connects accumulator (14).
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| CN201310262703.7A CN103290181B (en) | 2013-06-26 | 2013-06-26 | Supersonic gas (fog) scanning quenching nozzle |
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| CN201310262703.7A CN103290181B (en) | 2013-06-26 | 2013-06-26 | Supersonic gas (fog) scanning quenching nozzle |
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| CN103290181A true CN103290181A (en) | 2013-09-11 |
| CN103290181B CN103290181B (en) | 2015-04-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110343824A (en) * | 2019-07-16 | 2019-10-18 | 保定四方三伊电气有限公司 | A kind of scanning of integrated form, immersion liquid integral mechanism and operating method |
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| US3982668A (en) * | 1974-10-04 | 1976-09-28 | Ciba-Geigy Corporation | Aerosol dispenser for plurality of fluent materials |
| CN1086547A (en) * | 1992-10-31 | 1994-05-11 | 鞍山钢铁公司 | A kind of thermal treatment process of disc saw and device |
| CN2458087Y (en) * | 2001-01-16 | 2001-11-07 | 杨东胜 | Spraying device |
| JP2006187752A (en) * | 2005-01-06 | 2006-07-20 | Hitachi Industrial Equipment Systems Co Ltd | Special two-fluid washing nozzle |
| CN101880843A (en) * | 2010-07-12 | 2010-11-10 | 成都银河动力股份有限公司 | Aluminum alloy piston fog quenching heat treatment process and device thereof |
| CN202177433U (en) * | 2011-07-25 | 2012-03-28 | 浙江省计量科学研究院 | Electric drive piston type standard metering device for micro-flow |
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2013
- 2013-06-26 CN CN201310262703.7A patent/CN103290181B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3982668A (en) * | 1974-10-04 | 1976-09-28 | Ciba-Geigy Corporation | Aerosol dispenser for plurality of fluent materials |
| CN1086547A (en) * | 1992-10-31 | 1994-05-11 | 鞍山钢铁公司 | A kind of thermal treatment process of disc saw and device |
| CN2458087Y (en) * | 2001-01-16 | 2001-11-07 | 杨东胜 | Spraying device |
| JP2006187752A (en) * | 2005-01-06 | 2006-07-20 | Hitachi Industrial Equipment Systems Co Ltd | Special two-fluid washing nozzle |
| CN101880843A (en) * | 2010-07-12 | 2010-11-10 | 成都银河动力股份有限公司 | Aluminum alloy piston fog quenching heat treatment process and device thereof |
| CN202177433U (en) * | 2011-07-25 | 2012-03-28 | 浙江省计量科学研究院 | Electric drive piston type standard metering device for micro-flow |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110343824A (en) * | 2019-07-16 | 2019-10-18 | 保定四方三伊电气有限公司 | A kind of scanning of integrated form, immersion liquid integral mechanism and operating method |
| CN110343824B (en) * | 2019-07-16 | 2024-04-26 | 保定四方三伊电气有限公司 | Integrated scanning and immersion integrated mechanism and operation method |
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| CN103290181B (en) | 2015-04-22 |
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