CN102776470B - For method and the equipment used thereof of the Surface thermo-chemical treatment of mechanical component - Google Patents
For method and the equipment used thereof of the Surface thermo-chemical treatment of mechanical component Download PDFInfo
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- CN102776470B CN102776470B CN201210237957.9A CN201210237957A CN102776470B CN 102776470 B CN102776470 B CN 102776470B CN 201210237957 A CN201210237957 A CN 201210237957A CN 102776470 B CN102776470 B CN 102776470B
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Abstract
The present invention relates to a kind of method and equipment therefor thereof of the Surface thermo-chemical treatment for mechanical component, comprise material loading storing stand, front cleaning machine, pre-oxidation furnace, process furnace, rotary bottom type cementing furnace, rotary bottom type diffusion furnace, quenching cooling stove, quenching and preserving heat room, oil-quenching tank, rear cleaning machine, low-temp temper furnace, air-cooled, discharging platform.Above-mentioned each device is relatively independent, is linked together by transport sector, completes from material loading and get the raw materials ready → production technique of front cleaning → preoxidation → heating → carburizing → diffusion → cooling → insulation → quenching → rear cleaning → tempering → air-cooled → discharging and storing.This device is by independently oozing by force room and diffuser casing by oozing by force and spreading decomposition and come and perform respectively in carburization process, again by the combination of both different treatment times, achieve the requirement of same stove mass production of different layer depth requirement, differing materials part, play plant efficiency to greatest extent.
Description
Technical field
The present invention relates to a kind of method and equipment used thereof of heat treatment of workpieces, particularly relate to a kind of method and equipment used thereof of the Surface thermo-chemical treatment for mechanical component.
Background technology
As everyone knows, mechanical component carry out modification by Surface thermo-chemical treatment (carburizing, nitriding, Carbonitriding etc.), can obtain required performance, as high rigidity, and high-wearing feature, anti-seizing property etc.Carburizing (comprising Carbonitriding) is the surface chemical heat-treatment process of wherein a kind of typical, applied range.
Mechanical component (as gear), by carburizing and quenching process, not only have high surface hardness and wear resistance, and its fatigue lifetime increases considerably.The carburizing and quenching process of Part Typical Part is as follows: shove charge heat up-oozes by force-spreads-and slow cooling of lowering the temperature+reheat insulation-quench cooled+low-temperaturetempering.
At present, the equipment that the carburizing and quenching process of part adopts mainly is divided into two classes: (1) cycle stove, (2) continuous oven.It is load in stove by a collection of part by a charging tray that cycle stove is produced, and comes out of the stove after running a heat treatment cycle by the technological process of " heat up-insulation-cooling ", and then shove charge process second batch part.The typical type of furnace has pit furnace Carburise system, mult-purpose chamber furnace Carburise system.These two kinds of type of furnaces occupy more than 80% of the carburizing and quenching type of furnace.It is be contained in charging tray by part that continuous oven is produced, and multiple charging tray runs in continuous oven, and part is come out of the stove run the technological process required in stove after.Be characterized in continuous seepage, be particularly suitable for the process of part volume.This type of type of furnace has: stove, controlled atmosphere push-plate stove, controlled atmosphere ring furnace etc. at the bottom of controlled atmosphere meshbeltfurnace, controlled atmosphere rod.
During above-mentioned all carburizing type of furnace parts processed, there is a common drawback: case depth has the part of bigger difference can not heat-treat with stove, and the part of different steel grade can not be heat-treated with stove.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of method of the Surface thermo-chemical treatment for mechanical component, overcomes existing cycle stove or recirculation still can not heat-treat with stove the defect that case depth has the part of the part of bigger difference or different steel grade.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of method of the Surface thermo-chemical treatment for mechanical component, comprises following operating process:
Feeding, pending workpiece loading is placed in the empty charging tray of production plant, be placed on feeding platform by the charging tray transfer mechanism in workshop by the charging tray installing workpiece, be transferred in material loading storing stand subsequently, the charging tray proofing unit on described material loading storing stand is carried out detection to charging tray, is followed the tracks of;
Front cleaning, the charging tray proofing unit on material loading storing stand detects charging tray, and charging tray is transferred in front cleaning machine and cleaned by alkali lye, clear water by startup charging tray transfer device; Cleaning point 2 stations before described, namely buck embathes cleaning, and heat water-spraying cleans.
Preoxidation, the workpiece after cleaning is delivered in pre-oxidation furnace through transport sector; Described pre-oxidation furnace has 5 charging tray positions, point heating of 2nd district and control.
Heating, the workpiece completing preoxidation is transferred to end charging air-exchanging chamber by transport sector, and the pitch time that workpiece stops one-period is taken a breath, and transfers in process furnace, by the temperature that workpiece heat requires to carburizing; Described process furnace process furnace has 5 charging tray positions, point heating of 2nd district and control.
Carburizing, charging tray is transferred to annular through transport sector and is turned in end cementing furnace, by arranging different carburizing times, thus the carburizing requirement of different layer depths under completing identical controlled atmosphere; Described turning in end cementing furnace is provided with multiple charging tray station, and the number of station can be determined according to the size on the time of required process workpiece carbonization and cementing furnace chassis, the end of turning, as 10 to 20.When the carburizing time required for workpiece is greater than the time of the station stop of charging tray on the chassis turning end cementing furnace, charging tray proofing unit is carried charging tray signal to PLC module and is controlled charging tray by Controlling System and carries out next processing step;
Diffusion, after reaching the strong cementation process time of workpiece setting, charging tray is transferred to end diffusion furnace by transport sector, turns end diffusion furnace and spreads according to the processing parameter of setting; Described turning on end diffusion furnace is provided with multiple charging tray station, and the number of station can be determined according to the size on the time of required process workpiece carbonization and cementing furnace chassis, the end of turning, as 5 to 15; Described turning in end diffusion furnace is provided with multiple charging tray station.When the carburizing time required for workpiece is greater than the time of the station stop of charging tray on the chassis turning end diffusion furnace, charging tray proofing unit is carried charging tray signal to PLC module and is controlled charging tray by Controlling System and carries out next processing step;
Cooling, after reaching the diffusion technique time of workpiece setting, charging tray is transferred in quenching cooling stove by transport sector lowers the temperature;
Insulation, is transferred to quenching and preserving heat indoor by the transport sector in quenching cooling stove and is incubated;
Quenching, the transport sector of workpiece through quenching and preserving heat indoor is transferred to the lifting table of oil-quenching tank, is immersed in quenching oil carries out quench cooled by described lifting table, completes quenching process after keeping certain hour;
Rear cleaning, by caustic dip, clean water post-drying; Described rear cleaning through type single chamber cleaning machine is divided into caustic dip, clean water and oven dry 3 stations.Workpiece all stops the time of one-period on every 1 station, and the equidistant mobile transfer mechanism that relies on of charging tray completes.
Tempering, pushes to push-down tempering stove by transport sector by charging tray and carries out low-temperaturetempering to workpiece;
Air-cooled, after workpiece tempering, charging tray transfers to air-cooled enterprising sector-style cooling by transport sector;
Discharging storing, is transferred to through air-cooled workpiece on discharging storing stand through transport sector.
Device in above-mentioned steps independently realizes a processing parameter, and described transport sector comprises truck, push rod and chain transmission system.
The invention has the beneficial effects as follows: in thermal treatment process, oozing by force in carburization process come with diffusion decomposition perform respectively by independently oozing by force room and diffuser casing, again by the combination of both different treatment times, achieve the requirement of same stove mass production of different layer depth requirement, differing materials part, there is very flexible productive prospecting, to organizing production to provide conveniently condition, blank panel need not be pushed away when process shifts and carry out replacing process, having played plant efficiency to greatest extent.
On the basis of technique scheme, the present invention can also do following improvement.
Further, the temperature in described pre-oxidation furnace 350 ~ 550 DEG C.
The present invention also provides a kind of equipment of the Surface thermo-chemical treatment for mechanical component, comprise material loading storing stand, front cleaning machine, pre-oxidation furnace, process furnace, rotary bottom type cementing furnace, rotary bottom type diffusion furnace, quenching cooling stove, quenching and preserving heat room, oil-quenching tank, rear cleaning machine, low-temp temper furnace, air-cooled, discharging platform, described material loading storing stand, described front cleaning machine, described pre-oxidation furnace, described process furnace, described rotary bottom type cementing furnace, described rotary bottom type diffusion furnace, described quenching cooling stove, described quenching and preserving heat room, described oil-quenching tank, described rear cleaning machine, described low-temp temper furnace, described air-cooled, connected by transport sector successively between described discharging platform, described rotary bottom type cementing furnace and rotary bottom type diffusion furnace are annular.
The invention has the beneficial effects as follows: because above-mentioned each device is relatively independent, link together by transmission rig (truck, push rod and chain drive) is organic, due to by independently oozing by force room and diffuser casing by oozing by force and spreading decomposition and come and perform respectively in carburization process, the combination of different treatment time both being controlled by charging tray proofing unit, PLC module and Controlling System again, achieves the requirement of same stove mass production of different layer depth requirement, differing materials part.
Further, also comprise charging tray proofing unit, described charging tray proofing unit is arranged on described material loading storing stand, the position signal of described charging tray proofing unit record charging tray is delivered to PLC module, and described PLC module is controlled processing parameter by Controlling System or controls the motion of transport sector.
Further, described annular rotary bottom type cementing furnace comprises equipment base, external furnace body, inner furnace body, turntable, sealed knife, sealing oil groove, drive unit, Qianmen and Zhong Men, described external furnace body, inner furnace body, sealing oil groove and drive unit are installed on described equipment base; Described external furnace body is annular, and described inner furnace body is cylindrical; Described turntable is annular and is arranged between described external furnace body and described inner furnace body, is arranged on described drive unit; Described sealing oil cutter is annular, and is made up of one group of inner ring oil cutter and one group of outer shroud oil cutter, described one group of inner ring oil cutter one of them be fixed on inner furnace body outer lower portion, another is fixed on the bottom outside described turntable; Described one group of outer shroud oil cutter one of them be fixed on described external furnace body lower inside, another is fixed on the bottom outside described turntable; Described sealing oil groove is annular and is arranged on below described sealing oil cutter; Described Qianmen and Zhong Men are arranged on the diametric two ends of described external furnace body, and described Qianmen is connected with described process furnace, and described middle door is connected with described rotary bottom type diffusion furnace.Described sealing oil cutter inserts in the oil of sealing oil groove for sealing the atmosphere in burner hearth.
Further, described annular rotary bottom type diffusion furnace comprise equipment base, external furnace body, inner furnace body, for placing turntable, sealed knife, the sealing oil groove of charging tray, drive unit, back door, described external furnace body, inner furnace body, sealing oil groove and drive unit are installed on described equipment base; Described external furnace body is annular, and described inner furnace body is cylindrical; Described turntable is annular and is arranged between described external furnace body and described inner furnace body, is arranged on described drive unit; Described sealing oil cutter is annular, and is made up of one group of inner ring oil cutter and one group of outer shroud oil cutter, described one group of inner ring oil cutter one of them be fixed on inner furnace body outer lower portion, another is fixed on the bottom outside described turntable; Described one group of outer shroud oil cutter one of them be fixed on described external furnace body lower inside, another is fixed on the bottom outside described turntable; Described sealing oil groove is annular and is arranged on below described sealing oil cutter; Described back door is arranged on described external furnace body diametric(al) one end relative with described middle door, and described back door is connected with the described stove of lowering the temperature of quenching.Described sealing oil cutter inserts in the oil of sealing oil groove for sealing the atmosphere in burner hearth.
Described external furnace body and inner furnace body include furnace shell and furnace lining, and the housing of described process furnace, described annular rotary bottom type cementing furnace, described rotary bottom type diffusion furnace and described quenching cooling stove is integrally formed.
Described Qianmen, middle door and back door are used for heat and the atmosphere of isolated described process furnace, described annular rotary bottom type cementing furnace, described rotary bottom type diffusion furnace and described quenching cooling stove, are driven by motor.
Described sealing oil groove is supported by the screw mandrel be arranged on below described sealing oil groove.
Further, described annular rotary bottom type cementing furnace, described rotary bottom type diffusion furnace all also comprise the thermopair for measuring temperature in burner hearth and the oxygen probe for measuring carbon potential in burner hearth, described thermopair and oxygen probe insert in burner hearth through the top of external furnace body, and described thermopair and oxygen probe outside connect temperature controller and carbon control instrument respectively.
Described thermopair has master control temperature galvanic couple, from temperature control galvanic couple, master control temperature galvanic couple is used for the detection and control of Controlling Technology temperature; From temperature control galvanic couple with to detect with overtemperature and overtemperature cuts off computer heating control, each galvanic couple connects temperature controller, makes it formative dynamics variable Real-time Collection and automatic Closed control.
Described oxygen probe stretches in burner hearth by the tight socket of furnace roof, fully contacts with atmosphere, measures the carbon potential in stove, and realizes the control of carbon potential by control system PLC program and carbon control instrument.
Be provided with three temperature detecting point and two carbon potential monitoring points in described annular rotary bottom type cementing furnace, rotary bottom type diffusion furnace, the consistence of temperature in stove and carbon potential can be guaranteed.
Further, described annular rotary bottom type cementing furnace, described rotary bottom type diffusion furnace all also comprise for atmosphere in even burner hearth atmosphere circulator, described atmosphere circulator is arranged on the top of burner hearth.Described atmosphere circulator comprises motor driver and fan.
Further, described turntable is provided with grating switch, with the position detecting turntable rotation.
Further, the transport sector between described process furnace, described annular rotary bottom type cementing furnace, described rotary bottom type diffusion furnace and described quenching cooling stove is that side high temperature pushes away chain.
Accompanying drawing explanation
Fig. 1 is the method flow schematic diagram of the present invention for the Surface thermo-chemical treatment of mechanical component;
Fig. 2 is the equipment schematic diagram of the present invention for the Surface thermo-chemical treatment of mechanical component;
Fig. 3 is Fig. 2 A-A direction schematic diagram;
Fig. 4 is Fig. 2 A-A direction schematic diagram;
In accompanying drawing, the list of parts representated by each label is as follows:
1, material loading storing stand, 2, front cleaning machine, 3, pre-oxidation furnace, 4, process furnace, 5, annular turns end cementing furnace, 6, annular turns end diffusion furnace, 7, quenching cooling stove, 8, oil-quenching tank, cleaning machines after 9,10, tempering stove, 11, air-cooled, 12, the excessive platform of discharging.
Embodiment
Be described principle of the present invention and feature below in conjunction with accompanying drawing, example, only for explaining the present invention, is not intended to limit scope of the present invention.
The present invention is used for the method flow schematic diagram of the Surface thermo-chemical treatment of mechanical component as shown in Figure 1, comprise feeding, being loaded by pending workpiece is placed in the empty charging tray of production plant, by the charging tray transport sector-fork truck in workshop the charging tray installing workpiece put on the feeding platform on production line, the charging tray installing workpiece takes out and is transferred in material loading storing stand by the two-way transfer dolly now on production line, and the charging tray proofing unit on described material loading storing stand is carried out detection to charging tray, followed the tracks of;
Front cleaning, the charging tray proofing unit on material loading storing stand detects charging tray, and start charging tray transport sector and turned from material loading storing stand by charging tray charging tray and move on to front cleaning machine by two-way transfer dolly, front cleaning divides 2 stations, and namely buck embathes cleaning, and heat water-spraying cleans.
Preoxidation, the workpiece after cleaning shifts pre-oxidation furnace onto by transport sector-push rod.Pre-oxidation furnace has 5 charging tray positions, point heating of 2nd district and control, and use temperature scope is 350-550 DEG C; According to processing requirement, workpiece is preheating between 350-550 DEG C by pre-oxidation furnace.
Heating, transfer on the lifting table of end charging air-exchanging chamber by the workpiece completing preoxidation by pushing away chain mechanism, lifting table rises to the orbit altitude of push-down heated oven chamber with charging tray and workpiece.End charging air-exchanging chamber is the furnace chamber of a sealing, and in stove, large quantity of exhaust gas is discharged by the delivery pipe of this room, and workpiece is taken a breath in the pitch time of this room stop one-period simultaneously, and making workpiece enter heating chamber can be in protective atmosphere completely; By the electric pushrod of end charging air-exchanging chamber, charging tray is transferred to push-down process furnace by end charging air-exchanging chamber again.Push-down process furnace has 5 charging tray positions, point heating of 2nd district and control.In the temperature that workpiece heat requires to carburizing by this region.
Carburizing, charging tray pushes away chain via side high temperature and charging tray is transferred to annular by push-down process furnace turns in end cementing furnace and ooze process by force.By arranging different carburizing times, thus the carburizing requirement of different layer depths under completing identical controlled atmosphere.The stepping that annular turns charging tray in end cementing furnace stove is driven by gear motor and turns the end and complete, and is detected the position turning and rotate at the end by grating switch.Grating switch will detect that the simulating signal turning turned position, the end flows to charging tray tracking system, charging tray tracking system just simulating signal is converted into numerical signal and flows to Controlling System, the motion of Controlling System pinion motor, so to independently annular turn end cementing furnace carburizing by setting carburizing process parameters (temperature and carbon potential) control.Simultaneously for the ease of detecting the temperature of a position, each region and the consistence of carbon potential in stove, 3 temperature detection, 2 carbon potential check points are provided with in annular furnace, these check points are monitored each other, and when any one check point exceedes the deviate of regulation, system will send sound and light alarm.Time as overproof in main Control point, will automatically switch on not overproof auxiliary control check point.
Described annular turns end cementing furnace and turns at the end and be provided with 12 stations, and the number of station can be determined according to the carburizing time of product.
After reaching the strong cementation process time of workpiece setting, charging tray is transferred to annular by transport sector and turns end diffusion furnace, and annular turns end diffusion furnace and spreads according to the processing parameter of setting; After reaching the diffusion technique time, the simulating signal that charging tray proofing unit detects is flowed to charging tray tracking system by charging tray tracking system, simulating signal is converted into control signal and flows to Controlling System by charging tray tracking system, Controlling System controls the discharging mechanism that annular turns end cementing furnace, charging tray is transferred to annular and turns end diffusion furnace.
Diffusion, charging tray is transferred to annular by transport sector and turns end diffusion furnace, and annular turns end diffusion furnace and spreads according to the processing parameter of setting; After reaching the diffusion technique time of workpiece setting, the simulating signal that charging tray proofing unit detects is flowed to charging tray tracking system by charging tray tracking system, simulating signal is converted into control signal and flows to Controlling System by charging tray tracking system, Controlling System controls the discharging mechanism that annular turns end diffusion furnace, charging tray is transferred to quenching cooling stove.
Described annular turns end diffusion furnace and turns at the end and be provided with 8 stations.
Cooling, after reaching the diffusion technique time of workpiece setting, charging tray is transferred in quenching cooling stove by transport sector lowers the temperature;
Insulation, is transferred to quenching and preserving heat indoor by the transport sector in quenching cooling stove and is incubated;
Quenching, the transport sector of workpiece through quenching and preserving heat indoor is transferred to the lifting table of oil-quenching tank, is immersed in quenching oil carries out quench cooled by described lifting table, completes quenching process after keeping certain hour;
Rear cleaning, by caustic dip, clean water post-drying;
Tempering, pushes to push-down tempering stove by transport sector by charging tray and carries out low-temperaturetempering to workpiece;
Air-cooled, after workpiece tempering, charging tray transfers to air-cooled enterprising sector-style cooling by transport sector;
Discharging storing, is transferred to through air-cooled workpiece on discharging storing stand through transport sector.
Embodiment 1:
Carburizing and quenching is carried out for automobile gear.Be set with the heat treatment requirements of three kinds of gears as following table 1; According to the requirement of table 1, work out corresponding thermal treatment process as table 2:
The heat treatment requirements of table 1. three kinds of gears
Table 2 heat treatment process parameter
Above-mentioned three kinds of automobile gears are through material loading and get the raw materials ready → front cleaning → preoxidation → heating process after perform the technological process of carburizing and diffusion: it is 15-35min that production line turns in annular each station residence time that end cementing furnace carburizing and annular turn end diffusion furnace, ooze by force stove 12 stations, diffusion furnace 8 stations are put.Setting productive temp is 30min.
After 3 kinds of gears are contained in the enterprising stove of charging tray respectively, turn end cementing furnace carburizing by the charging tray proofing unit on material loading storing stand and PLC time variable control processing parameter and annular and annular turns end diffusion furnace running or transmitting device runs.
A gear turns end cementing furnace in annular and stops 660/30=22 station (fortune enters recirculation after circling), proceed to diffusion, 360/30=12 station (fortune enters recirculation after circling) is stopped at diffusion furnace, proceed to the quenching of cooling quenching furnance, then entering the tempering stove 1(temperature set is 180 DEG C) carry out tempering.
B gear turns end cementing furnace in annular and stops 300/30=10 station, proceeds to diffusion, stops 150/30=5 station at diffusion furnace, and proceed to the quenching of cooling quenching furnance, then entering the tempering stove 2(temperature set is 200 DEG C) carry out tempering.
C gear turns end cementing furnace in annular and stops 540/30=18 station (fortune enters recirculation after circling), proceed to diffusion, 300/30=10 station (fortune enters recirculation after circling) is stopped at diffusion furnace, proceed to the quenching of cooling quenching furnance, then entering the tempering stove 1(temperature set is 180 DEG C) carry out tempering.
Above-mentioned three kinds of gears, respectively through carburizing with after the diffusion technique time, enter cooling → insulation → quenching → rear cleaning → tempering → air-cooled → discharging and storing, complete technical process.
Fig. 2 is the equipment schematic diagram of the present invention for the Surface thermo-chemical treatment of mechanical component, comprise material loading storing stand 1, front cleaning machine 2, pre-oxidation furnace 3, process furnace 4, rotary bottom type cementing furnace 5, rotary bottom type diffusion furnace 6, quenching cooling stove 7, quenching and preserving heat room 8, oil-quenching tank 9, rear cleaning machine 10, low-temp temper furnace 11, air-cooled 12, discharging platform 13, charging tray proofing unit, described material loading storing stand 1, described front cleaning machine 2, described pre-oxidation furnace 3, described process furnace 4, described rotary bottom type cementing furnace 5, described rotary bottom type diffusion furnace 6, described quenching cooling stove 7, described quenching and preserving heat room 8, described oil-quenching tank 9, described rear cleaning machine 10, described low-temp temper furnace 11, described air-cooled 12, connected by transport sector successively between described discharging platform 13, described material loading storing stand 1 is provided with charging tray proofing unit.Described rotary bottom type cementing furnace 5 and rotary bottom type diffusion furnace 6 are annular.The position signal of described charging tray proofing unit record charging tray is delivered to PLC module, and described PLC module is controlled processing parameter by Controlling System or controls the motion of transport sector.
Transport sector between described process furnace 4, described annular rotary bottom type cementing furnace 5, described rotary bottom type diffusion furnace 6 and described quenching cooling stove 7 is that side high temperature pushes away chain.
Be provided with three temperature detecting point and two carbon potential monitoring points in described annular rotary bottom type cementing furnace 5, rotary bottom type diffusion furnace 6, the consistence of temperature in stove and carbon potential can be guaranteed.
Fig. 3 is Fig. 2 A-A directional profile schematic diagram; Annular rotary bottom type cementing furnace 5 structure as shown in Figure 3 comprises described annular rotary bottom type cementing furnace 5 and comprises equipment base 18, external furnace body 504, inner furnace body 502, turntable 509, sealed knife, sealing oil groove 505, drive unit 508, Qianmen 14 and middle door 15, described external furnace body 504, inner furnace body 502, sealing oil groove 505 and drive unit 508 are installed on described equipment base 18; Described external furnace body 504 is annular, and described inner furnace body 502 is cylindrical; Described turntable 510 is annular and is arranged between described external furnace body 504 and described inner furnace body 502, is arranged on described drive unit 508; Described sealing oil cutter 506 is annular, and is made up of one group of inner ring oil cutter 5061 and one group of outer shroud oil cutter 5062, described one group of inner ring oil cutter 5061 one of them be fixed on inner furnace body 502 outer lower portion, another is fixed on the bottom outside described turntable 509; Described one group of outer shroud oil cutter 5062 one of them be fixed on described external furnace body 504 lower inside, another is fixed on the bottom outside described turntable 509; Described sealing oil groove 505 is annular and is arranged on below described sealing oil cutter 506; Described Qianmen 14 and middle door 15 are arranged on the described diametric two ends of external furnace body 504, and described Qianmen 14 is connected with described process furnace 4, and described middle door 15 is connected with described rotary bottom type diffusion furnace 6.
Fig. 4 is Fig. 2 A-A directional profile schematic diagram; Annular rotary bottom type diffusion furnace 6 structure as shown in Figure 3 comprise equipment base 18, external furnace body 604, inner furnace body 602, for placing turntable 609, sealed knife 606, the sealing oil groove 605 of charging tray, drive unit 608, back door 16, described external furnace body 604, inner furnace body 602, sealing oil groove 605 and drive unit 608 are installed on described equipment base 18; Described external furnace body 604 is annular, and described inner furnace body 602 is cylindrical; Described turntable is annular and is arranged between described external furnace body 604 and described inner furnace body 602, is arranged on described drive unit 608; Described sealing oil cutter is annular, and is made up of one group of inner ring oil cutter 6061 and one group of outer shroud oil cutter 6062, described one group of inner ring oil cutter 6061 one of them be fixed on inner furnace body 602 outer lower portion, another is fixed on the bottom outside described turntable 609; Described one group of outer shroud oil cutter 6062 one of them be fixed on described external furnace body 604 lower inside, another is fixed on the bottom outside described turntable 609; Described sealing oil groove 605 is annular and is arranged on below described sealing oil cutter; Described back door 16 is arranged on described external furnace body 604 diametric(al) one end relative with described middle door 15, and described back door 16 is connected with the described stove 7 of lowering the temperature of quenching.
The external furnace body of the external furnace body of described annular rotary bottom type cementing furnace 5 and inner furnace body and described rotary bottom type diffusion furnace 6 and inner furnace body include furnace shell 5031,6031 and furnace lining 5032,6032, the housing of described process furnace 4, described annular rotary bottom type cementing furnace 5, described rotary bottom type diffusion furnace 6 and described quenching cooling stove 7 is integrally formed, and the transport sector between it is that side high temperature pushes away chain mechanism 17.
Described Qianmen 14, middle door 15 and back door 16, for completely cutting off heat and the atmosphere of described process furnace 4, described annular rotary bottom type cementing furnace 5, described rotary bottom type diffusion furnace 6 and described quenching cooling stove 7, are driven by motor.Described sealing oil groove 605 is supported by the screw mandrel be arranged on below described sealing oil groove 605.
Described annular rotary bottom type cementing furnace 5, described rotary bottom type diffusion furnace 6 all also comprise the thermopair for measuring temperature in burner hearth 507,607 and the oxygen probe for measuring carbon potential in burner hearth 507,607, described thermopair and oxygen probe insert in burner hearth through the top of external furnace body, and described thermopair and oxygen probe outside connect temperature controller and carbon control instrument respectively.
Described thermopair has master control temperature galvanic couple, from temperature control galvanic couple, master control temperature galvanic couple is used for the detection and control of Controlling Technology temperature; From temperature control galvanic couple with to detect with overtemperature and overtemperature cuts off computer heating control, each galvanic couple connects temperature controller, makes it formative dynamics variable Real-time Collection and automatic Closed control.
Described oxygen probe stretches in burner hearth by the tight socket of furnace roof, fully contacts with atmosphere, measures the carbon potential in stove, and realizes the control of carbon potential by control system PLC program and carbon control instrument.
Described annular rotary bottom type cementing furnace 5, described rotary bottom type diffusion furnace 6 all also comprise for atmosphere in even burner hearth atmosphere circulator 501,601, described atmosphere circulator is arranged on the top of burner hearth.Described atmosphere circulator comprises motor driver and fan.
Described turntable 509,609 is provided with grating switch, with the position detecting turntable rotation.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. for a method for the Surface thermo-chemical treatment of mechanical component, it is characterized in that, comprise following operating process:
Feeding, being loaded by pending workpiece is placed in the empty charging tray of production plant, be placed on feeding platform by the charging tray transport sector in workshop by the charging tray installing workpiece, be transferred in material loading storing stand subsequently, the charging tray proofing unit on described material loading storing stand is carried out detection to charging tray, is followed the tracks of;
Front cleaning, the charging tray proofing unit on material loading storing stand detects charging tray, and charging tray is transferred in front cleaning machine and cleaned by alkali lye, clear water by startup charging tray transfer device;
Preoxidation, the workpiece after cleaning is delivered in pre-oxidation furnace through transport sector;
Heating, the workpiece completing preoxidation is transferred to end charging air-exchanging chamber by transport sector, and the time that workpiece stops a beat takes a breath, and transfers in process furnace, by the temperature that workpiece heat requires to carburizing;
Carburizing, charging tray is transferred in end cementing furnace through transport sector, by arranging different carburizing times, thus the carburizing requirement of different layer depths under completing identical controlled atmosphere;
Diffusion, after reaching the strong cementation process time of workpiece setting, charging tray is transferred to end diffusion furnace by transport sector, turns end diffusion furnace and spreads according to the processing parameter of setting;
Cooling, after reaching the diffusion technique time of workpiece setting, charging tray is transferred in quenching cooling stove by transport sector lowers the temperature;
Insulation, is transferred to quenching and preserving heat indoor by the transport sector in quenching cooling stove and is incubated;
Quenching, the transport sector of workpiece through quenching and preserving heat indoor is transferred to the lifting table of oil-quenching tank, is immersed in quenching oil carries out quench cooled by described lifting table, completes quenching process after keeping certain hour according to processing requirement;
Rear cleaning, by caustic dip, clean water post-drying;
Tempering, pushes to push-down tempering stove by transport sector by charging tray and carries out low-temperaturetempering to workpiece;
Air-cooled, after workpiece tempering, charging tray transfers to air-cooled enterprising sector-style cooling by transport sector;
Discharging storing, is transferred to through air-cooled workpiece on discharging storing stand through transport sector.
2. the method for the Surface thermo-chemical treatment for mechanical component according to claim 1, is characterized in that, the temperature in described pre-oxidation furnace 350 ~ 550 DEG C.
3. the equipment for the Surface thermo-chemical treatment of mechanical component, it is characterized in that, comprise material loading storing stand, front cleaning machine, pre-oxidation furnace, process furnace, rotary bottom type cementing furnace, rotary bottom type diffusion furnace, quenching cooling stove, quenching and preserving heat room, oil-quenching tank, rear cleaning machine, low-temp temper furnace, air-cooled, discharging platform, charging tray proofing unit, described material loading storing stand, described front cleaning machine, described pre-oxidation furnace, described end charging air-exchanging chamber, described process furnace, described rotary bottom type cementing furnace, described rotary bottom type diffusion furnace, described quenching cooling stove, described quenching and preserving heat room, described oil-quenching tank, described rear cleaning machine, described low-temp temper furnace, described air-cooled, connected by transport sector successively between described discharging platform, described rotary bottom type cementing furnace is annular rotary bottom type cementing furnace, and described rotary bottom type diffusion furnace is annular rotary bottom type diffusion furnace.
4. the equipment of the Surface thermo-chemical treatment for mechanical component according to claim 3, is characterized in that, also comprises charging tray proofing unit, and described charging tray proofing unit is arranged on described material loading storing stand.
5. the equipment of the Surface thermo-chemical treatment for mechanical component according to claim 4, it is characterized in that, described annular rotary bottom type cementing furnace comprises equipment base, external furnace body, inner furnace body, turntable, sealed knife, sealing oil groove, drive unit, Qianmen and Zhong Men, described external furnace body, inner furnace body, sealing oil groove and drive unit are installed on described equipment base; Described external furnace body is annular, and described inner furnace body is cylindrical; Described turntable is annular and is arranged between described external furnace body and described inner furnace body, is arranged on described drive unit; Described sealing oil cutter is annular, and is made up of one group of inner ring oil cutter and one group of outer shroud oil cutter, described one group of inner ring oil cutter one of them be fixed on inner furnace body outer lower portion, another is fixed on the bottom outside described turntable; Described one group of outer shroud oil cutter one of them be fixed on described external furnace body lower inside, another is fixed on the bottom outside described turntable; Described sealing oil groove is annular and is arranged on below described sealing oil cutter; Described Qianmen and Zhong Men are arranged on the diametric two ends of described external furnace body, and described Qianmen is connected with described process furnace, and described middle door is connected with described annular rotary bottom type diffusion furnace.
6. the equipment of the Surface thermo-chemical treatment for mechanical component according to claim 5, it is characterized in that, described annular rotary bottom type diffusion furnace comprises equipment base, external furnace body, inner furnace body, turntable, sealed knife, sealing oil groove, drive unit, back door, described external furnace body, inner furnace body, sealing oil groove and drive unit are installed on described equipment base; Described external furnace body is annular, and described inner furnace body is cylindrical; Described turntable is annular and is arranged between described external furnace body and described inner furnace body, is arranged on described drive unit; Described sealing oil cutter is annular, and is made up of one group of inner ring oil cutter and one group of outer shroud oil cutter, described one group of inner ring oil cutter one of them be fixed on inner furnace body outer lower portion, another is fixed on the bottom outside described turntable; Described one group of outer shroud oil cutter one of them be fixed on described external furnace body lower inside, another is fixed on the bottom outside described turntable; Described sealing oil groove is annular and is arranged on below described sealing oil cutter; Described back door is arranged on described external furnace body diametric(al) one end relative with described middle door, and described back door is connected with the described stove of lowering the temperature of quenching.
7. the equipment of the Surface thermo-chemical treatment for mechanical component according to claim 5 or 6, it is characterized in that, described annular rotary bottom type cementing furnace, described rotary bottom type diffusion furnace all also comprise the thermopair for measuring temperature in burner hearth and the oxygen probe for measuring carbon potential in burner hearth, described thermopair and oxygen probe insert in burner hearth through the top of external furnace body, and described thermopair and oxygen probe outside connect temperature controller and carbon control instrument respectively.
8. the equipment of the Surface thermo-chemical treatment for mechanical component according to claim 5 or 6, it is characterized in that, described annular rotary bottom type cementing furnace, described rotary bottom type diffusion furnace all also comprise for atmosphere in even burner hearth atmosphere circulator, described atmosphere circulator is arranged on the top of burner hearth.
9. the equipment of the Surface thermo-chemical treatment for mechanical component according to claim 5 or 6, is characterized in that, described turntable is provided with grating switch, with the position detecting turntable rotation.
10. the equipment of the Surface thermo-chemical treatment for mechanical component according to claim 5 or 6, it is characterized in that, the transport sector between described process furnace, described annular rotary bottom type cementing furnace, described rotary bottom type diffusion furnace and described quenching cooling stove is that side high temperature pushes away chain.
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| CN201210237957.9A CN102776470B (en) | 2012-07-09 | 2012-07-09 | For method and the equipment used thereof of the Surface thermo-chemical treatment of mechanical component |
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| CN201210237957.9A CN102776470B (en) | 2012-07-09 | 2012-07-09 | For method and the equipment used thereof of the Surface thermo-chemical treatment of mechanical component |
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Effective date of registration: 20160324 Address after: 213311 Liyang city of Jiangsu province Daitou Industrial Zone No. 66 East Peilu Patentee after: HEPHAES HEAT TREATMENT SYSTEMS JIANGSU CO., LTD. Address before: 102208 Beijing, Huilongguan, Changping District, East Asia, North 2-2-1707 Patentee before: Chen Xi |