CN103290181B - Supersonic gas (fog) scanning quenching nozzle - Google Patents
Supersonic gas (fog) scanning quenching nozzle Download PDFInfo
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- CN103290181B CN103290181B CN201310262703.7A CN201310262703A CN103290181B CN 103290181 B CN103290181 B CN 103290181B CN 201310262703 A CN201310262703 A CN 201310262703A CN 103290181 B CN103290181 B CN 103290181B
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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 equipment for Heating Processing field.In particular to a kind of supersonic gas, mist scanning quenching nozzle.
Background technology
Gear induction quenching of the prior art mainly adopts liquid quenching medium.Spray quenching is adopted for the gear once heated, spray quenching is adopted for carbon steel gear, spray water-based hardening liquid, i.e. PAG water-based quenching medium are adopted for steel alloy gear.The concentration of water-based hardening liquid according to the alloy element component of material, namely will regulate according to the through hardening performance of steel.High denseer to the concentration of the high material hardening liquid of hardening capacity, on the contrary then lower.The gear higher to some alloying element also can adopt and be transferred to oil groove quenching or embedding oil quenching.Above-mentioned traditional quenching technology gear final cooling temperature owing to can not observe the actual process of cooling of workpiece, therefore is generally all cooled to less than 100 DEG C, till namely water does not evaporate.During use PAG hardening liquid, workpiece often will be cooled to less than 70 DEG C, because now quenchant can dissolve in water again again.Can save quenchant like this, the workpiece of oil groove of quenching treats that missing of ignition can the termination of oil on workpiece is quenched, and now workpiece still emits dense oil smoke after going 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 is not only by the impact of its concentration, and be subject to oil product and the aging impact of various Additive Properties, this just needs the cooling performance curve on schedule detecting quenchant also to 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, and regulates quenchant performance to be one indirectly means, can not reach ideal quenching result.On the other hand, the size, modulus, shape service condition, estimated performance etc. of workpiece vary, and ensure that the performance one of a collection of workpiece is made peace and realize the personalized quenching effect of various gear, obviously this is that prior art is unapproachable.
Along with the development of advancing by leaps and bounds of contemporary Power Electronic Technique, there is the breakthrough of matter 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, this technology relates to the core of thermal treatment phase transformation, and this technology will affect the shape of martensite quenched zone, distribution and microtexture form, and phase-change product is only final the pursuing a goal of thermal treatment.
In sum, innovation gear induction quenching technique and lathe are another importances of development gear induction heat treatment.The spray quenching that gear induction quenching of the prior art adopts and Dip another shortcoming oil-quenched are exactly the pollution to environment, that PAG hardening liquid or quenching oil all must be cleaned and just can proceed to tempering sequence, this will consume energy again, and the sewage that thermal treatment produces generally all does not do purifying process, and directly entering sink drainage, the environmental pollution caused thus can not be ignored.
In prior art, vacuum heat treatment furnace has the type of furnace of carrying out high pressure, high flow-rate gas quenching, and the scope of application of this technique 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 up to 20 ~ 40bar, as this quenching method is applied to gear induction quenching in then without any technology and economic worth.The induction quenching of gear requires that workpiece more than 2 seconds, must not then require 0.5 second to carbon steel from the cooling time of austenitizing Heating temperature to 650 DEG C.In a word, in prior art, the gas quenching technique of vacuum heat treatment is then not suitable for the induction quenching of gear.
A brand-new technical field with compressed air quenching, before this this just a kind of imagination there is no example.Because cooling is far different two pieces thing with quenching.Because gear induction quenching is a zero-time holding technique, stabilization of austenite is poor, and in initial development, even if structural alloy steel, adopt 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 is also a power consumption engineering, and as can not doulbe-sides' victory on technology and economy, so this technology also have practical value.
The content of invention
A kind of supersonic gas, mist is the object of the present invention is to provide to scan quenching nozzle.For creating the omnidistance temperature-visualized 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, thus realize gear surface personalization quenching, (speed of cooling reaches 1 to the present invention also aims to create a kind of supersonic speed, 000 DEG C/s, gas velocity reaches ≈ 300 ~ 500 meter per second) induction quenching novel process, to reducing heat treatment deformation and obtaining ultrahigh hardness, the present invention also aims to the zero environmental realizing gear induction quenching, the green operative goals of No clean.
Content of the present invention
A kind of supersonic gas, mist scanning quenching nozzle, it is characterized in that: a taper nozzle 2, nozzle upper end is tuyere 1, mixing section 3 is had in nozzle, nozzle lower end connects inlet pipe 4, and inlet pipe lower end is provided with air inlet electromagnetic valve 5, and air inlet electromagnetic valve connects compressed 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 had 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.The nozzle cavity that to be main body be with 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 is 0.3 ~ 0.8mm, cavity rear end has pipe screw joint can connect pressurized air and water route, and water route and steam line are 30 ° and are connected.
The innovative point more than invented is summarized as follows:
(1) supersonic gas, mist scanning quenching nozzle are the brand-new handy gear induction quenching instruments of heat treatment industry one, and obtain unprecedented uniform hardness, at the hardness value difference≤0.5HRC of a gear different sites, this is that any one tradition quenching method can not realize.
(2) supersonic gas, mist are the instantaneous adjustable green quenchants of a kind of brand-new speed of cooling, this compressed-air actuated thermal capacity containing minor amount of water substantially exceeds the thermal capacity of hydrogen, thus improve compressed-air actuated cooling power, and save compressed-air actuated consumption, and compare hydric safe.Its speed of cooling not only can overing number, the range of application of oil and water-based quenching medium, and its speed of cooling also can rise to more than 1000 DEG C/sec, and this will open up the new process regime of induction heat treatment.
Accompanying drawing explanation
Accompanying drawing 1 is supersonic gas, spray painting chews structural representation.
In figure: 1 tuyere, 2 nozzles, 3 mixing sections, 4 inlet pipe, 5 air inlet electromagnetic valves, 6 compressed 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, nozzle upper end is tuyere 1, has mixing section 3 in nozzle, and nozzle lower end connects inlet pipe 4, and inlet pipe lower end is provided with air inlet electromagnetic valve 5, and air inlet electromagnetic valve connects compressed 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 had 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.
Supersonic gas, mist scanning quenching nozzle
This nozzle cavity that to be main body be with 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 is 0.3 ~ 0.8mm, cavity rear end has pipe screw joint can connect pressurized air and water route, and water route and steam line are 30 ° and are connected.During quenching, pressurized air enters nozzle cavity by gas pipe line, is sprayed after cone-shaped cavity supercharging by tuyere slabbing, realizes the change of the gas velocity of ejection by adjusting compressed-air actuated intake pressure (0.6 ~ 1.0MPa).Described above is jet quenching, then opens water-supply line as improved speed of cooling.In order to accurately control the cooling rate that confluent also can repeat to spray, way of supplying water of the present invention often props up nozzle to configure all separately a piston-type water measurement pump.Volume pump is by the pump housing, piston, Miniature ball lead screw pair, and AC servo motor and magnetic valve form.When needs supply water, servomotor completes rotation in 300 ~ 500 milliseconds, piston is at leading screw, and advance one segment distance under the promotion of nut, its piston surface area (square centimeter) is service discharge with the product of piston linear travel distance (centimetre).Nozzle is a kind of accurate annex, and it will ensure that the jet amount of often propping up nozzle is fully consistent with the water content in mist.When the water in piston pump is about to when completing, water supply electromagnetic valve is closed.Retaining magnetic valve is opened, and now piston returns start bit, and water is inhaled into piston pump by water tank, then retaining closed electromagnetic valve.Everything action has all been come by the program preset, and all programs can set again on the touchscreen, revises and additions and deletions.The multiple quenching modes such as said mechanism can require according to the quenching of workpiece and implement jet quenching, fog quenching, jet-spraying-jet quenching, jet-to spray water-spray-jet.And the quality of quenching process can must be shaped after the analysis of metallographic and Electronic Speculum.These actions must complete rapidly to Ms point in work-piece cools, when workpiece surface is cooled near Ms point, namely nozzle quenching action terminates, and workpiece geneva at remaining temperature knows from experience spontaneous completing, avoiding problems the cumulative of thermal stresses and structural stress, thus avoid 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 of material, and puts into practice with workpiece quenching and organically link up, thus heat treatment operation under making working condition is more scientific and reasonable, and thermal treatment quality is risen to higher level.
Claims (1)
1. a supersonic gas, mist scanning quenching nozzle, it is characterized in that: a taper nozzle (2), nozzle upper end is tuyere (1), mixing section (3) is had in nozzle, nozzle lower end connects inlet pipe (4), inlet pipe lower end is provided with air inlet electromagnetic valve (5), and air inlet electromagnetic valve connects compressed 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 had 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), 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); This nozzle cavity that to be main body be with 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 is 0.3 ~ 0.8mm, cavity rear end has pipe screw joint can connect pressurized air and water route, and water route and steam line are 30 ° and are connected.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310262703.7A CN103290181B (en) | 2013-06-26 | 2013-06-26 | Supersonic gas (fog) scanning quenching nozzle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310262703.7A CN103290181B (en) | 2013-06-26 | 2013-06-26 | Supersonic gas (fog) scanning quenching nozzle |
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| Publication Number | Publication Date |
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| CN103290181A CN103290181A (en) | 2013-09-11 |
| CN103290181B true CN103290181B (en) | 2015-04-22 |
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| 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 |
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 |
-
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 |
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| CN103290181A (en) | 2013-09-11 |
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