CN106011440B - A kind of quenching unit and its technique for super-huge excavator support groove portion - Google Patents
A kind of quenching unit and its technique for super-huge excavator support groove portion Download PDFInfo
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- CN106011440B CN106011440B CN201610600008.0A CN201610600008A CN106011440B CN 106011440 B CN106011440 B CN 106011440B CN 201610600008 A CN201610600008 A CN 201610600008A CN 106011440 B CN106011440 B CN 106011440B
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- 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
- C21D9/34—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tyres; for rims
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- 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
- C21D1/34—Methods of heating
- C21D1/42—Induction heating
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Mechanical Engineering (AREA)
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- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention belongs to smithcraft quenching technology field, it is related to a kind of quenching unit and its technique for super-huge excavator support groove portion, apparatus of the present invention include vertical Induction Hardening Machine, thrust wheel supports raceway quenching water spray quenching apparatus, thrust wheel support raceway impewdance matching heating frock, present invention process puts the workpiece in Induction Hardening Machine fix first, secondly, use thrust wheel support raceway impewdance matching heating frock, to workpiece heat under 300-600Hz frequency, then, again raceway quenching water spray quenching apparatus is supported with thrust wheel, using clear water as cooling medium, water spray chilling is carried out to the thrust wheel raceway position heated.The present invention can realize the deep layer sensing heating link supported to thrust wheel of digging machine in groove portion and adjacent shaft shoulder face progress Quenching Treatment, save the energy, improve operating efficiency.
Description
Technical field
The present invention relates to a kind of quenching unit and its technique for super-huge excavator support groove portion, category metal quenching
Technical field.
Background technology
Large excavator is the indispensable advanced loading instrument of surface mine mining operations, and wherein thrust wheel is ore deposit
One of large consumption spare part on mountain.Thrust wheel of digging machine is as part important in excavator transmission system.It is responsible for carrying
The dead load of excavator or the task of dynamic loading.Due to excavator, situation changes very greatly in use, so thrust wheel rolls
The size for the load that road part is born and direction also change constantly.Such as when excavator starts in the scope of operation that is uneven
Or when stopping, because excavator itself is very heavy, the very big frictional force of moment generation between meeting and creeper tread；In mining process repeatedly
In also suffer from very big impulsive force, tired pit, abrasion can be produced on such thrust wheel roller surface, or even bulk is peeled off.It is aobvious
And be clear to, the condition of work of thrust wheel of digging machine is very harsh.
When excavator works, all load is acted on thrust wheel raceway position.It bears the effect of bending stress, this
Kind stress is the cycle, and he will produce fatigue fracture.The roller surface of thrust wheel is acted on creeper tread, and creeper tread directly connects
Touch, can be acted on by contact stress and frictional force.
Thrust wheel working environment was worked in the outdoor four seasons, is subjected to temperature change, is also subjected to dust, muddy, wind and snow
Deng harsh weather.Thrust wheel of digging machine condition of work is harsh that stress is complicated, and working environment is severe as can be seen here
's.Cause seriously to stop production once going wrong, therefore extend the direction that thrust wheel service life is producer's effort always.
Thrust wheel of digging machine typically uses 42CrMo forged materials.At present typically by two methods to thrust wheel groove portion
Divide and carry out quenching heat treatment：
1. after thrust wheel to be integrally heated to 850 DEG C of insulation a period of times in salt bath furnace or in resistance furnace, then containing
Have in addition 10%NaOH (or 10%NaCl) aqueous solution and cooled down.
2. after carrying out sensing heating to thrust wheel raceway position using 1-10kHz intermediate frequencies or 100kHz high frequencies, then containing
Cooled down in 8-10%PAG aqueous solution.
Stress is larger when bulk heat treatmet quenches, and easily causes cracking, case hardness is low, and uniformity of hardness is poor, quench-hardened case
It is shallower, the shortcomings of energy resource consumption is high.Being cooled down using containing addition 10%NaOH (or 10%NaCl) aqueous solution, cost is relatively high,
Not environmentally.
Using 1-10kHz intermediate frequencies or 100kHz high-frequency induction quenchings, although energy consumption is low, case hardness is high, right
In large-scale workpiece as thrust wheel, using 1-10kHz intermediate frequencies or 100kHz high-frequency induction heatings, because kelvin effect is brighter
It is aobvious, so the quench-hardened case obtained in the case where ensureing good hoc scenario is shallow, in 3-5mm or so.In addition this method transition region is hard
It is precipitous to spend gradient, easily produces peel off chip off-falling in use.This method uses to be cooled down containing 8-10%PAG aqueous solution, cost
Height, because adding PAG also not environmentally.
The content of the invention
The present invention is problem present in the current technology of solution, there is provided a kind of to support groove portion for super-huge excavator
Quenching unit and its technique.It can realize the disposably support groove portion to thrust wheel of digging machine and the sensing of adjacent shaft shoulder face deep layer
Heating function, reduce heating times, save the energy and worker labour, improve operating efficiency.
The present invention is achieved using following technical scheme：
A kind of quenching unit for super-huge excavator support groove portion, including the support of Induction Hardening Machine, thrust wheel
Raceway quenching water spray quenching apparatus, thrust wheel support raceway impewdance matching heating frock, thrust wheel support raceway impewdance matching add
Thermal technology's dress is located at the corresponding working position of workpiece in Induction Hardening Machine, and is engaged, and thrust wheel support raceway quenching water spray is anxious
Device for cooling is located at the top of thrust wheel support raceway impewdance matching heating frock.
The vertical Induction Hardening Machine includes mechanical driving part, power pack, cooling segment three parts, the machinery
Running part includes support frame, the motor on support frame top, the leading screw positioned at support frame both sides, and from top to bottom upper
Crossbeam, intermediate transverse girder, sill and the polished rod of both sides, the centre of entablature is top provided with first, and the first top side is provided with work
Part electric rotating machine, the first top rotation is driven by workpiece electric rotating machine, leading screw is by the nut on entablature, in drive
Crossbeam moves up and down；The entablature, intermediate transverse girder, sill and the polished rod of both sides form a framework, wherein entablature, under
Crossbeam and the polished rod of both sides form a fixed frame, and there is a pulley at the both ends of entablature in fixed frame, and pulley is along being fixed on
Slided in the track on framework both sides；There is pulley at the both ends of sill, are slided along the track for being fixed on cistern both sides.
The fixed frame, framework is driven to be moved up and down along the track of both sides by the leading screw of lathe both sides, fixed frame
Centre is provided with intermediate transverse girder, and intermediate transverse girder is provided with clamping screw, intermediate transverse girder and polished rod is locked, when clamping screw and polished rod
Locking when unclamping, polished rod passes freely through intermediate transverse girder, can adjust the distance of lathe entablature and intermediate transverse girder, once locking screw
After bolt and polished rod locking, then intermediate transverse girder is just and entablature, sill, polished rod are configured to a fixed frame, can be together
Move up and down, intermediate transverse girder is top provided with second, and the first top work that will prepare induction heat treatment together of lathe entablature
Part is fixed on lathe, and the fixed frame that workpiece drives with leading screw moves up and down.
The power pack includes intermediate frequency power cabinet, lathe induction hardening transformer, capacitance group, machine operation console, described
Lathe induction hardening transformer is located at below machine framework, is fixed on framework, and can move forward and backward, and with thrust wheel back-up roller
Road sensing heating frock is connected, and by adjusting the number of turn of lathe induction hardening transformer and the quantity of capacitance group, adjusts needed for workpiece
The working frequency of heating.
The cooling system, including pumping plant, water coolers, the water of pumping plant is flow in water bag by pipeline store
Press, be provided with many cooling water outlet tube heads above water coolers, valve, the cooling for Machine Tools Electric and workpiece are carried on tube head.
The cooling of the Machine Tools Electric includes the cooling of lathe induction hardening transformer, the cooling of capacitance group, thrust wheel back-up roller
The cooling of road sensing heating frock；By high pressure resistant water pipe lathe induction hardening transformer, capacitance group and Zhi Chong are connected to from water coolers
In wheel support raceway sensing heating frock, cistern is then flowed to by respective water return pipeline.
The cooling of the workpiece is to be connected to thrust wheel support raceway quenching water spray urgency from water coolers by high pressure resistant water pipe
On the water inlet pipe of device for cooling, cooling water is injected in work after supporting raceway quenching water spray quenching apparatus by high-pressure water pipe, thrust wheel
On part, returned to after workpiece is cooled down rapidly in cistern.
The machine operation console connects and controls the operation of each several part.
The workpiece is the thrust wheel after semifinishing.
The thrust wheel support raceway quenching water spray quenching apparatus includes the casing of arc hollow, for supporting raceway axle
Portion quenches the arc surface water spray plate of cooling, for handing over support raceway axle portion and the second support raceway shaft shoulder, thrust wheel chamfering
The inner conical drogue water spray plate of quenching cooling at boundary, and the water inlet pipe being arranged on casing.
Arc surface water spray plate is arranged on the inner side of casing, and inner conical drogue water spray plate is arranged on arc surface water spray plate upper end, and with
Casing forms an entirety.
Array is provided with some hole for water sprayings on arc surface water spray plate, and array is set on the madial wall of inner conical drogue water spray plate
There are some hole for water sprayings.
Inner conical drogue water spray plate slopes inwardly in arc surface water spray plate upper end.
The thrust wheel support raceway impewdance matching heating frock includes cooling water inlet pipe, raised end face heating arc shape red copper
Pipe, the first silicon steel sheet magnetic conductor, support groove portion heat vertical copper tube, the second silicon steel sheet magnetic conductor, support groove portion heating
Arcuation spiral copper tube, the 3rd silicon steel sheet magnetic conductor, raised end face are heated copper tube with support groove portion transition arc, cooled down out
Water pipe, second electrode, first electrode.
Insulation board is provided between second electrode, first electrode.
First electrode, raised end face heating arc shape copper tube, support groove portion heat vertical copper tube, support groove portion adds
Hot arcuation spiral copper tube, raised end face and support raceway root transition arc heating copper tube and second electrode are sequentially connected in series
Connection, forms a single-turn circular coil, and the internal diameter of single-turn circular coil is more than the external diameter of excavator support groove portion.
Cool down water inlet pipe, raised end face heating arc shape copper tube, support groove portion and heat vertical copper tube, support groove portion
Heating arcuation spiral copper tube, raised end face and support groove portion transition arc heating copper tube, cooling water outlet pipe are sequentially communicated,
Coil can be cooled down by cooling water.
The first silicon steel sheet magnetic conductor is enclosed with raised end face heating arc shape copper tube, U-shaped mouth supports raceway towards first
The shaft shoulder, the magnetic line of force is gathered on the shaft shoulder using the notch effect of magnetic conductor, improves shoulder heating efficiency.
Support groove portion heats and the second silicon steel sheet magnetic conductor is enclosed with vertical copper tube, U-shaped mouth direction support raceway axle
Portion, the magnetic line of force is gathered in axle portion surface using the notch effect of magnetic conductor, improves the axle portion efficiency of heating surface.
Raised end face on the transition arc heating copper tube of support raceway root with being enclosed with the 3rd silicon steel sheet magnetic conductor；U-shaped
Mouth is supported on the circular arc of raceway shaft shoulder root towards first, and the magnetic line of force is gathered in into shaft shoulder circular arc using the notch effect of magnetic conductor
On, improve the root circular arc efficiency of heating surface.
Support the operation principle of the quenching sensing heating frock of groove portion：
First electrode is connected with second electrode with induction hardening transformer is incorporated to power supply, and electric current sequentially flows through each copper tube group
Into coil, when being connected with alternating current in coil, within and around coil just produce an alternating magnetic field, be placed in line
Workpiece inside circle is just cut by the magnetic line of force of alternating magnetic field, then will have induced electromotive force production in support raceway axle portion
It is raw, and vortex is produced under electromotive force effect, due to being vortexed the impedance very little in loop, strength of vortex is naturally very big, returns vortex
Road produces very big heat, so as to the support raceway axle portion in coil, the first support raceway shaft shoulder, the second support raceway axle
Shoulder, the first support raceway shaft shoulder root circular arc are heated.
A kind of technique quenched using the above-mentioned quenching unit for super-huge excavator support groove portion, including following step
Suddenly：
First, workpiece is put into Induction Hardening Machine by semi-finished thrust wheel and fixed, secondly, use branch
Roller support raceway impewdance matching heating frock, to workpiece heat under 300-600Hz frequency, then, then with thrust wheel branch
Raceway quenching water spray quenching apparatus is supportted, using clear water as cooling medium, water spray chilling is carried out to the thrust wheel raceway position heated.
Preferably, the material of the thrust wheel is 4340 forged steel, Tempering and Quenching is carried out before impewdance matching, after modifier treatment
The case hardness of thrust wheel is 220-250HB.
Preferably, a kind of quenching technical for super-huge excavator support groove portion stated, it is characterized in that including following
Specific steps：
A. workpiece configurations prepare：Workpiece is carried out quenched, carry out semifinishing after quenched, make group for follow-up impewdance matching
Knit preparation.
Semifinishing leaves surplus, support raceway axle portion, the first support raceway shaft shoulder and the first support raceway shaft shoulder root
Portion's circular arc surplus is 2~2.5mm, and support raceway axle portion length surplus is 5~5.5mm, and chamfering intersection radius of machining is justified for 6mm
Arc, all Ra1.6 μm of workpiece roughness.
Support in the range of raceway axle portion termination, and the second support raceway shaft shoulder 50mm, i.e. 50mm above and below chamfering intersection
In the range of, it is polished with wheel polisher, it is ensured that be visible by naked eyes machining spur.
B. the fixation of workpiece：First raceway impewdance matching heating frock is supported to be temporarily attached to lathe quenching transformation thrust wheel
On device, then workpiece thrust wheel is placed on lathe, operation lathe is moved by entablature, makes lathe entablature and intermediate transverse girder
It is top up and down to head into thrust wheel centre bore, locked lathe intermediate transverse girder；On the basis of workpiece thrust wheel, mobile machine tool quenching becomes
Gap between depressor adjustment thrust wheel support raceway impewdance matching heating frock and workpiece thrust wheel is 10~15mm, keeps work
Part and the suitable gap of coil are avoided producing short circuit sparking burn workpiece, while coil and workpiece are arranged concentrically, when ensureing heating
Temperature is uniform；The thrust wheel support raceway impewdance matching heating frock is horizontal positioned.
Thrust wheel support raceway impewdance matching heating frock and lathe induction hardening transformer are fixed, two contact plate surfaces are clear
It is clean, non-oxidation phenomenon；Then water coolers are connected with high-pressure water pipe and thrust wheel supports entering for raceway impewdance matching heating frock
Water pipe, with the outlet pipe of water pipe connection thrust wheel support raceway impewdance matching heating frock, water outlet is come in cistern.
C., thrust wheel support raceway quenching water spray quenching apparatus is installed：Thrust wheel support raceway is installed on the basis of workpiece to quench
Fire-fighting water quick cooling device, lower edge and the thrust wheel support raceway impewdance matching of thrust wheel support raceway quenching water spray quenching apparatus add
It is 100~150mm that thermal technology, which fills the distance between 3 upper edge,；Ensure thrust wheel support raceway quenching water spray quenching apparatus and workpiece
Between 20~40mm, thrust wheel support raceway quenching water spray quenching apparatus installation will ensure level, and be fixed in gap；With
High-pressure water pipe connects water coolers and thrust wheel supports all water inlet pipes of raceway quenching water spray quenching apparatus.
D. trial line charging：The number of turn for adjusting lathe induction hardening transformer is 8:1, capacitance group is 3.5；Open and lead on water coolers
Toward the inlet valve of thrust wheel support raceway impewdance matching heating frock, confirm that water flowing is smooth, pressure is 0.15~0.2MPa.
Thrust wheel support raceway is partially placed into thrust wheel support raceway impewdance matching heating frock by operation lathe, is sent
Electricity, the frequency meter observed on lathe operating console 7, frequency is 450 ± 30Hz.
E. water is tried：Thrust wheel support raceway is partially placed into water spray quenching apparatus by operation lathe, opens total valve, adjustment
Whether import 0.2-0.3MPa of hydraulic pressure, rotational workpieces, observation cooling water are uniform, it is ensured that workpiece upper-lower position is sprayed by water, tiltedly spray
All it is sprayed on the second support raceway shaft shoulder, closes valve.
F. thrust wheel support groove portion sensing heating：
First stage, referred to as initial period, operation lathe move down workpiece, make chamfering work piece intersection and thrust wheel back-up roller
It is 20~25mm that support groove portion in road impewdance matching heating frock, which heats the distance between vertical copper tube lower edge,；First
The raceway shaft shoulder is supportted to heat on vertical copper tube along it with the support groove portion in thrust wheel support raceway impewdance matching heating frock
Between distance be 30~40mm, 30 revs/min of rotational workpieces.
Power transmission, is transferred to 450kw by power in 30 seconds and is kept for 9 minutes or so, and support raceway axle is detected with far infrared temperature measurement instrument
Centre position position on minister's degree ----for support raceway axle portion centre position far from end face 100mm, workpiece support raceway axle
900--920 DEG C of the temperature of middle position on minister's degree, the stage heat to support raceway axle portion.
Second stage, workpiece is moved up, chamfering work piece intersection and thrust wheel is supported in raceway impewdance matching heating frock
Support groove portion to heat the distance between vertical copper tube lower edge substantially equal for 0~5mm；Determine at chamfering intersection chamfering
Surface temperature is 820~850 DEG C, and the stage temperature of the radial penetration and chamfering intersection to the second support raceway shaft shoulder is carried out
Computer heating control.
Phase III, workpiece is moved down, the first support raceway shaft shoulder is supported raceway impewdance matching heating frock with thrust wheel
In support groove portion heat on vertical copper tube along the distance between be 10~15mm, determine workpiece first supports raceway axle
Shoulder, the first 850--870 DEG C of support raceway shaft shoulder root circular arc surface temperature；The stage be to first support the raceway shaft shoulder and
First support raceway shaft shoulder root circular arc is heated.
Workpiece is moved up with 50mm~60mm/ component velocities, when chamfering intersection position is quenched apart from thrust wheel support raceway sensing
The support groove portion of fire heating frock stops power supply when heating on vertical copper tube along at 50~60mm.
G. thrust wheel support groove portion cooling stage：Operation lathe workpiece continues to move up, make the first support raceway shaft shoulder with
Along 20~80mm on thrust wheel support raceway quenching water spray quenching apparatus, stop movement；Then determined using far infrared temperature measurement instrument
When chamfering intersection surface temperature is to 790~810 DEG C, the rapid valve for opening thrust wheel support raceway quenching water spray quenching apparatus
Door, quick refrigeration is carried out to workpiece, it is desirable to which 0.2-0.3MPa of hydraulic pressure, workpiece is in thrust wheel support raceway quenching water spray chilling dress
Middle cooling 12~13 minutes is put, closes valve, stops cooling, when workpiece surface temperature is 40~50 DEG C after cooling, is stopped the rotation.
H. lower workpiece is hung, workpiece is turned around, repeats above-mentioned action, completes the quenching process of thrust wheel support groove portion.
Case hardness of the workpiece after quenching technical is heat-treated is 58~60HRC.
The workpiece is after quenching technical is heat-treated, more than quench-hardened case 17mm.
The present invention has the advantages of following notable compared with prior art：
The thrust wheel processed using apparatus of the present invention and quenching technical, because deep layer senses quick heating, crystal grain is tiny, tissue
Uniformly.Using spray clear water chilling, structural transformation is thorough, and case hardness is high, and case hardness is uniform, and Wear Resistance is good, uses the longevity
Life length；Hardened depth, transition region hardness is gentle, is not likely to produce bulk peeling；Contacting fatigue resistance is superior, is not likely to produce pit
Peel off.Not only it is widely applied in all thrust wheels of crawler crane, also to other similar to having in axle class impewdance matching
Good application prospect.
Brief description of the drawings
Fig. 1 is Induction Hardening Machine schematic diagram.
Fig. 2 is supporting wheel structure schematic diagram.
Fig. 3 is that thrust wheel raceway position impewdance matching frock installs front view.
Fig. 4 is Fig. 3 A-A top views.
Fig. 5 is Fig. 2 right view.
Fig. 6 is thrust wheel sensing heating frock front view.
Fig. 7 is thrust wheel raceway quenching water spray quenching apparatus schematic diagram.
Fig. 8 is thrust wheel raceway position sensing heating first stage position view.
Fig. 9 is thrust wheel raceway position sensing heating second stage position view.
Figure 10 is thrust wheel raceway position sensing heating phase III position view.
Figure 11 is thrust wheel raceway position water-spraying control position view.
Each part numbers explanation in figure：
1st, thrust wheel；2nd, thrust wheel support raceway quenching water spray quenching apparatus；3rd, thrust wheel support raceway impewdance matching adds
Thermal technology fills；4th, water coolers；5th, lathe induction hardening transformer；6th, capacitance group；7th, machine operation console；8th, lathe support frame；
9th, leading screw；10th, motor；11st, workpiece electric rotating machine；12nd, lathe entablature；13rd, lathe intermediate transverse girder；14th, lathe sill；
15th, cistern；16 polished rods.
114th, raceway axle portion is supported；115th, the first support raceway shaft shoulder；116th, the second support raceway shaft shoulder；117th, first
Support raceway shaft shoulder root circular arc, 118, chamfering intersection；119th, the centre position in the length of raceway axle portion 114 is supported.
201st, inner conical drogue water spray plate；202nd, casing；203rd, water inlet pipe；204th, arc surface water spray plate.
301st, raised end face heating arc shape copper tube；302nd, the first silicon steel sheet magnetic conductor；303rd, support groove portion heating perpendicular
To copper tube；304th, the second silicon steel sheet magnetic conductor；305th, groove portion heating arcuation spiral copper tube is supported；306 the 3rd silicon steel sheets
Magnetic conductor；307th, raised end face and support groove portion transition arc heating copper tube；308th, coolant outlet；309th, the second electricity
Pole；310th, first electrode；311st, insulation board；312nd, cooling water inlet.
Embodiment
The embodiment of the present invention is described in detail with reference to the accompanying drawings.
Referring to Fig. 1~Figure 11.
The embodiment of a kind of quenching unit for being used for super-huge excavator support groove portion of the present invention and its technique is to be directed to
Terex/O＆KRH170 type thrust wheels, it is also suitable for other giant caterpillar formula thrust wheel of digging machine.
A kind of quenching unit for super-huge excavator support groove portion of the present invention, including vertical Induction Hardening Machine,
Thrust wheel support raceway quenching water spray quenching apparatus 2, thrust wheel support raceway impewdance matching heating frock 3, thrust wheel back-up roller
Impewdance matching heating frock 3 in road is located at the corresponding working position of workpiece in Induction Hardening Machine, and is engaged, thrust wheel back-up roller
Road quenching water spray quenching apparatus 2 is located at the top of thrust wheel support raceway impewdance matching heating frock 3.
The vertical Induction Hardening Machine includes mechanical driving part, power pack, cooling segment three parts, the machinery
Running part include support frame 8, the motor 10 on the top of support frame 8, the leading screw 9 positioned at the both sides of support frame 8, and by upper and
Under entablature 12, intermediate transverse girder 13, sill 14 and the polished rod 16 of both sides, the centre of entablature 12 be provided with it is first top, the
One top side is provided with workpiece electric rotating machine 11, and the first top rotation is driven by workpiece electric rotating machine 11, leading screw 9 by installed in
Nut on entablature 12, entablature 12 is driven to move up and down；The entablature 12, intermediate transverse girder 13, sill 14 and both sides
Polished rod 16 form a framework, wherein entablature 12, sill 14 and both sides polished rod 16 form a fixed frame, determine frame
There is a pulley at the both ends of entablature 12 in frame, and pulley is slided along being fixed in the track on the both sides of framework 8；The both ends of sill 14 have
Pulley, slided along the track for being fixed on cistern both sides.
This fixed frame, framework is driven to be moved up and down along the track of both sides by the leading screw 9 of lathe both sides, fixed frame
Centre is provided with intermediate transverse girder 13, and intermediate transverse girder 13 is provided with clamping screw, intermediate transverse girder 13 and polished rod 16 are locked, work as locking screw
When the locking of bolt and polished rod is unclamped, polished rod 16 passes freely through intermediate transverse girder 13, can adjust lathe entablature 12 and intermediate transverse girder 13
Distance, after clamping screw and polished rod 16 are locked, then intermediate transverse girder 13 is just and entablature 12, sill 14, polished rod 16
Be configured to a fixed frame, can move up and down together, intermediate transverse girder 13 be provided with it is second top, and the of lathe entablature 12
One it is top together by prepare induction heat treatment workpiece be fixed on lathe, workpiece with leading screw 9 drive fixed frame on move down
It is dynamic.
The power pack includes intermediate frequency power cabinet, lathe induction hardening transformer 5, capacitance group 6, machine operation console 7, institute
State lathe induction hardening transformer 5 to be located at below machine framework, be fixed on framework, can move forward and backward, and supported with thrust wheel
Raceway sensing heating frock 3 (induction coil) is connected, by adjusting the number of turn of lathe induction hardening transformer 5 and the number of capacitance group 6
Amount, the working frequency of heating needed for regulation workpiece.
The cooling system, including pumping plant, water coolers 4, the water of pumping plant flow to that water bag 4 is inner to be stored by pipeline
Press, water coolers 4 are provided with many cooling water outlet tube heads above, and valve is carried on tube head, for the cold of Machine Tools Electric and workpiece
But.
The cooling of the Machine Tools Electric includes the cooling of lathe induction hardening transformer 5, the cooling of capacitance group 6, thrust wheel support
The cooling of raceway sensing heating frock 3 (induction coil)；By high pressure resistant water pipe lathe induction hardening transformer is connected to from water coolers 4
5th, in capacitance group 6 and thrust wheel support raceway sensing heating frock 3, cistern 15 is then flowed to by respective water return pipeline.
The cooling of the workpiece is to be connected to thrust wheel support raceway quenching water spray urgency from water coolers 4 by high pressure resistant water pipe
On the water inlet pipe 203 of device for cooling 2, cooling water sprays after supporting raceway quenching water spray quenching apparatus 2 by high-pressure water pipe, thrust wheel
On workpiece, returned to after workpiece is cooled down rapidly in cistern 15.
The machine operation console 7 connects and controls the operation of each several part.
The workpiece is the thrust wheel 1 after semifinishing.
The thrust wheel support raceway quenching water spray quenching apparatus 2 includes the casing 202 of arc hollow, for back-up roller
Road axle portion 114 quenches the arc surface water spray plate 204 of cooling, for supporting the raceway shaft shoulder to support raceway axle portion 114 and second
116th, the inner conical drogue water spray plate 201 of the quenching of thrust wheel chamfering intersection 118 cooling, and the water inlet pipe being arranged on casing 202
203；Water inlet pipe 203 is 4~10.
Arc surface water spray plate 204 is arranged on the inner side of casing 202, and inner conical drogue water spray plate 201 is arranged on arc surface water spray plate
204 upper ends, and form an entirety with casing 202.
Array is provided with some hole for water sprayings on arc surface water spray plate 204, is gone into battle in the madial wall of inner conical drogue water spray plate 201
Row are provided with some hole for water sprayings.
Inner conical drogue water spray plate 201 slopes inwardly in the upper end of arc surface water spray plate 204.
Thrust wheel support raceway quenching water spray quenching apparatus operation principle be：Clear water from water bag passes through water inlet pipe
Is pressed in 203 arrival casings 202, then with faster speed from inner conical drogue water spray plate 201 and/or from arc surface water spray plate
Hole for water spraying on 204 passes through, and is ejected into respectively on workpiece support groove portion surface, the workpiece of sensing heating is implemented rapidly cold
But, the structural transformation of martensite is completed.The workpiece hardened depth so cooled down, case hardness are uniform.
The thrust wheel support raceway impewdance matching heating frock 3 includes cooling water inlet pipe 312, raised end face heating arc shape
Copper tube 301, the first silicon steel sheet magnetic conductor 302, support groove portion heat vertical copper tube 303, the second silicon steel sheet magnetic conductor
304th, groove portion heating arcuation spiral copper tube 305, the 3rd silicon steel sheet magnetic conductor 306, raised end face and support groove portion are supported
Transition arc heating copper tube 307, cooling water outlet pipe 308, second electrode 309, first electrode 310；Second electrode 309, first
Insulation board 311 is provided between electrode 310；See Fig. 6.
The first electrode 310, raised end face heating arc shape copper tube 301, support groove portion heat vertical copper tube
303rd, groove portion heating arcuation spiral copper tube 305, raised end face and support raceway root transition arc heating copper tube are supported
307 and second electrode 309 be sequentially connected in series connection, form a single-turn circular coil, the internal diameter of single-turn circular coil is more than excavator support
The external diameter of groove portion.
Cool down water inlet pipe 312, raised end face heating arc shape copper tube 301, support groove portion heat vertical copper tube 303,
Groove portion heating arcuation spiral copper tube 305, raised end face and support groove portion transition arc is supported to heat copper tube 307, cold
But outlet pipe 308 is sequentially communicated, and coil can be cooled down by cooling water.
The first silicon steel sheet magnetic conductor 302 is enclosed with raised end face heating arc shape copper tube 301, U-shaped mouth is towards first
The raceway shaft shoulder 115 is supportted, the magnetic line of force is gathered on the shaft shoulder using the notch effect of magnetic conductor, improves shoulder heating efficiency.
Support groove portion heats and the second silicon steel sheet magnetic conductor 304 is enclosed with vertical copper tube 303, U-shaped mouth direction support
Raceway axle portion 114, the magnetic line of force is gathered in axle portion surface using the notch effect of magnetic conductor, improves the axle portion efficiency of heating surface.
Raised end face on the transition arc heating copper tube 307 of support raceway root with being enclosed with the 3rd silicon steel sheet magnetic conductor
306；U-shaped mouth is supported on raceway shaft shoulder root circular arc 117 towards first, is gathered in the magnetic line of force using the notch effect of magnetic conductor
On shaft shoulder circular arc, the root circular arc efficiency of heating surface is improved.
Support the operation principle of the quenching sensing heating frock 3 of groove portion.
First electrode 10 is connected with second electrode 9 with induction hardening transformer 5 is incorporated to power supply, and electric current sequentially flows through each red copper
The coil of pipe composition, when being connected with alternating current in coil, an alternating magnetic field is just produced within and around coil, is put
Just cut in the workpiece of coil inside by the magnetic line of force of alternating magnetic field, then there will be induced electromotive force in support raceway axle portion
Produce, and vortex is produced under electromotive force effect, due to being vortexed the impedance very little in loop, strength of vortex is naturally very big, makes vortex
Loop produces very big heat, so as to support the raceway shaft shoulder 115, second to support the support raceway axle portion 114, first in coil
The raceway shaft shoulder 116, first supports raceway shaft shoulder root circular arc 117 to be heated.
A kind of technique quenched using the above-mentioned quenching unit for super-huge excavator support groove portion, including following step
Suddenly：
First, workpiece is put into Induction Hardening Machine by semi-finished thrust wheel 1 and fixed, secondly, used
Thrust wheel support raceway impewdance matching heating frock 3, to workpiece heat under 300-600Hz frequency, then, then uses Zhi Chong
Wheel support raceway quenching water spray quenching apparatus 2, using clear water as cooling medium, sprays water to the thrust wheel raceway position heated
Chilling.
The material of the thrust wheel 1 is 4340 forged steel, and Tempering and Quenching, thrust wheel after modifier treatment are carried out before impewdance matching
1 case hardness is 220~250HB.
Semifinishing is carried out before thrust wheel impewdance matching after quenched.On the one hand thrust wheel semifinishing senses for rear road
The factor for the chamfering hardening break that tissue prepares and profile prepares, and exclusion tool marks trigger is carried out in quenching, and it is suitable on the other hand to leave
Allowance i.e. prevent areal deformation decarburization, again reduce after road process time.
Preferably, described a kind of quenching technical for super-huge excavator support groove portion, including walk in detail below
Suddenly：
A. workpiece configurations prepare：Thrust wheel is carried out it is quenched, it is quenched after carry out semifinishing, for quenching make tissue profile standard
The finishing of standby and postorder leaves surplus, and support raceway axle portion 114, first supports the support raceway axle of the raceway shaft shoulder 115 and first
The surplus of shoulder root circular arc 117 is 2~2.5mm, and the length surplus of support raceway axle portion 114 is 5~5.5mm, and chamfering intersection 118 adds
Work radius is 6mm circular arcs, all Ra1.6 μm of workpiece roughness.
Support the termination of raceway axle portion 114, and the second support raceway shaft shoulder 116, in the range of 50mm, i.e. chamfering intersection
In the range of about 118 50mm, it is polished with wheel polisher, it is ensured that be visible by naked eyes machining spur.
Because sensing heating can produce vortex concentration phenomenon to workpiece sharp corner, chamfering work piece intersection 118 will be justified
Arc processing, reduce the tendency of the steep temperature rise of heating sharp corner.
After other chamfering work piece intersection 118 heats in cooling procedure, control cracking.Reason is that heating is easy to temperature at this
It is higher, in addition because the structural stress of structural transformation and thermal stress superposition finally show tensile stress state when cooling down, if deposited
In sharp machining spur, trigger cracking under above-mentioned factor effect.This point is the weight of workpiece induction heat treatment in the present invention
Invent.
B. the fixation of workpiece：First support raceway impewdance matching heating frock 3 to be temporarily fixed at lathe quenching thrust wheel to become
On depressor 5, then workpiece thrust wheel 1 is placed on lathe, operation lathe is moved by entablature 12, make lathe entablature 12 and in
Between crossbeam 13 it is upper and lower it is top head into thrust wheel centre bore, locked lathe intermediate transverse girder 13；On the basis of workpiece thrust wheel 1,
Operation lathe makes between the movement of induction hardening transformer 5 adjustment thrust wheel support raceway impewdance matching heating frock 3 and workpiece thrust wheel 1
Gap be 10~15mm, keep workpiece and the suitable gap of coil to avoid producing short circuit sparking burn workpiece, at the same coil and
Workpiece is arranged concentrically, and ensures that temperature is uniform during heating；Using with level measurement, it is ensured that thrust wheel support raceway impewdance matching adds
It is horizontal positioned that thermal technology fills 3.
Thrust wheel support raceway impewdance matching heating frock 3 and lathe induction hardening transformer 5 are fixed, two contact plate surfaces
Cleaning, non-oxidation phenomenon, oxidation is such as found, is cleaned out with sand paper；Then water coolers 4 and thrust wheel are connected with high-pressure water pipe
The water inlet pipe 312 of raceway impewdance matching heating frock 3 is supported, with water pipe connection thrust wheel support raceway impewdance matching heating frock
3 outlet pipe 308, water outlet is come in cistern 15.(see Fig. 3, Fig. 4, Fig. 5)
C., thrust wheel support raceway quenching water spray quenching apparatus 2 is installed：Thrust wheel support raceway is installed on the basis of workpiece
Quenching water spray quenching apparatus 2, lower edge and the thrust wheel support raceway sensing of thrust wheel support raceway quenching water spray quenching apparatus 2 are quenched
The distance between upper edge of fire heating frock 3 is 100~150mm；Ensure the He of thrust wheel support raceway quenching water spray quenching apparatus 2
For workpiece gap between 20~40mm, the installation of thrust wheel support raceway quenching water spray quenching apparatus 2 will ensure level, and be consolidated
It is fixed；Water coolers 4 are connected with high-pressure water pipe and thrust wheel supports all water inlet pipes 203 of raceway quenching water spray quenching apparatus 2.
D. trial line charging：The number of turn for adjusting lathe induction hardening transformer 5 is 8:1, capacitance group 6 is 3.5；Open water coolers 4
The upper inlet valve towards thrust wheel support raceway impewdance matching heating frock 3, confirming that water flowing is smooth, pressure is 0.15~
0.2MPa。
Thrust wheel support raceway is partially placed into thrust wheel support raceway impewdance matching heating frock 3 by operation lathe, is sent
Electricity, the frequency meter observed on operating console 7, frequency is 450 ± 30Hz.
E. water is tried：Thrust wheel support raceway is partially placed into water spray quenching apparatus by operation lathe, opens total valve, adjustment
Whether import 0.2-0.3MPa of hydraulic pressure, rotational workpieces, observation cooling water are uniform, it is ensured that workpiece upper-lower position is sprayed by water, tiltedly spray
All it is sprayed on the second support raceway shaft shoulder 116, closes valve.
F. thrust wheel support groove portion sensing heating：
First stage, referred to as initial period, operation lathe move down workpiece, make chamfering work piece intersection 118 and thrust wheel branch
Support the support groove portion in raceway impewdance matching heating frock 3 heat the distance between vertical lower edge of copper tube 303 for 20~
25mm；The first support raceway shaft shoulder 115 and the support groove portion heating in thrust wheel support raceway impewdance matching heating frock 3 are perpendicular
On to copper tube 303 along the distance between be 30~40mm, 30 revs/min of rotational workpieces.
Power transmission, is transferred to 450kw by power in 30 seconds and is kept for 9 minutes or so, and support raceway axle is detected with far infrared temperature measurement instrument
The position of centre position 119 in the length of portion 114, to support the centre position 100mm of raceway axle portion 114, workpiece support raceway axle
900~920 DEG C of temperature at centre position 119 in the length of portion 114, the heating emphasis in the stage is to supporting raceway axle portion 114
Heated.
Second stage, workpiece is moved up, chamfering work piece intersection 118 and thrust wheel is supported raceway impewdance matching heating frock
It is substantially equal for 0~5mm that support groove portion in 3 heats the distance between vertical lower edge of copper tube 303；Determine chamfering intersection
Surface temperature is 820~850 DEG C at 118 chamferings, and the heating emphasis in the stage is that the radial direction of the second support raceway shaft shoulder 116 is oozed
Saturating and chamfering intersection 118 temperature carries out computer heating control.See Fig. 2, Fig. 9.
Phase III, workpiece is moved down, make the first support raceway shaft shoulder 115 and thrust wheel support raceway impewdance matching heater
It is 10~15mm to fill the support groove portion in 3 and heat the distance between edge on vertical copper tube 303, determines the first support of workpiece
The raceway shaft shoulder 115, first supports 850~870 DEG C of surface temperature at raceway shaft shoulder root circular arc 117；The heating emphasis in the stage
It is that the first support raceway shaft shoulder 115 and the first support raceway shaft shoulder root circular arc (117) are heated, sees Figure 10.
Workpiece is moved up with 50mm~60mm/ component velocities, when the position of chamfering intersection 118 is apart from thrust wheel support raceway sensing
The support groove portion of Quench heating frock 3 stops power supply when heating on vertical copper tube 303 along at 50--60mm.
G. thrust wheel support groove portion cooling stage：Operation lathe workpiece continues to move up, and makes the first support raceway shaft shoulder 115
With, along 20~80mm, seeing Figure 11 on thrust wheel support raceway quenching water spray quenching apparatus 2, stopping movement；Then far infrared is utilized
It is rapid to open thrust wheel support raceway quenching spray when surface temperature is to 790~810 DEG C at temperature measurer measure chamfering intersection 118
The valve of water quick cooling device 2, quick refrigeration is carried out to workpiece, it is desirable to which 0.2~0.3MPa of hydraulic pressure, workpiece support raceway in thrust wheel
Cooled down 12~13 minutes in quenching water spray quenching apparatus 2, close valve, stop cooling, after cooling workpiece surface temperature be 40~
At 50 DEG C, stop the rotation.
H. lower workpiece is hung, workpiece is turned around, repeats above-mentioned action, completes the quenching process of thrust wheel support groove portion.
Case hardness of the workpiece after quenching technical is heat-treated is 58~60HRC.
The workpiece is after quenching technical is heat-treated, more than quench-hardened case 17mm.
In a word, the present invention realizes that disposably the support groove portion to thrust wheel of digging machine and the adjacent shaft shoulder are carried out not on request
Heated with depth, meet the deep layer heating of technical requirements, reduce heating times, saved worker labour, improve work
Efficiency.
Claims (6)
1. a kind of quenching unit for super-huge excavator support groove portion, it is characterized in that, including vertical Induction Hardening Machine,
Thrust wheel support raceway quenching water spray quenching apparatus (2), thrust wheel support raceway impewdance matching heating frock (3), thrust wheel branch
Support raceway impewdance matching heating frock (3) is located at the corresponding working position of workpiece in Induction Hardening Machine, and is engaged, thrust wheel
Support raceway quenching water spray quenching apparatus (2) is located at the top of thrust wheel support raceway impewdance matching heating frock (3)；
The vertical Induction Hardening Machine includes mechanical driving part, power pack, cooling segment three parts, the machine driving
Part includes support frame (8), the motor (10) on support frame (8) top, the leading screw (9) positioned at support frame (8) both sides, and
Entablature (12) from top to bottom, intermediate transverse girder (13), sill (14) and the polished rod (16) of both sides, the centre of entablature (12)
Top provided with first, the first top side is provided with workpiece electric rotating machine (11), top by workpiece electric rotating machine (11) drive first
Rotate, leading screw (9) drives entablature (12) to move up and down by the nut on entablature (12)；The entablature
(12), the polished rod (16) of intermediate transverse girder (13), sill (14) and both sides forms a framework, wherein entablature (12), lower horizontal stroke
Beam (14) and the polished rod (16) of both sides form a fixed frame, and there are pulley, pulley in the both ends of entablature (12) in fixed frame
Slided along being fixed in the track on framework (8) both sides；There is pulley at the both ends of sill (14), along being fixed on cistern both sides
Track slide；
The fixed frame, framework is driven to be moved up and down along the track of both sides by the leading screw (9) of lathe both sides, in fixed frame
Between be provided with intermediate transverse girder (13), intermediate transverse girder (13) is provided with clamping screw, and intermediate transverse girder (13) and polished rod (16) are locked, when
When the locking of clamping screw and polished rod is unclamped, polished rod (16) passes freely through intermediate transverse girder (13), can adjust lathe entablature (12)
With the distance of intermediate transverse girder (13), once clamping screw and polished rod (16) locking after, then intermediate transverse girder (13) just and entablature
(12), sill (14), polished rod (16) are configured to a fixed frame, can move up and down together, and intermediate transverse girder (13) is provided with
Second is top, and lathe entablature (12) first it is top together by prepare induction heat treatment workpiece be fixed on lathe, work
The fixed frame that part drives with leading screw (9) moves up and down；
The power pack includes intermediate frequency power cabinet, lathe induction hardening transformer (5), capacitance group (6), machine operation console (7),
The lathe induction hardening transformer (5) is located at below machine framework, is fixed on framework, can move forward and backward, and and thrust wheel
Support raceway sensing heating frock (3) is connected, by adjusting the number of turn of lathe induction hardening transformer (5) and the number of capacitance group (6)
Amount, the working frequency of heating needed for regulation workpiece；
The cooling system, including pumping plant, water coolers (4), the water of pumping plant flow to that Shui Bao (4) is inner to be stored by pipeline
Press, water coolers (4) are provided with some cooling water outlet tube heads above, and valve is carried on tube head, for Machine Tools Electric and workpiece
Cooling；
The cooling of the Machine Tools Electric includes the cooling of lathe induction hardening transformer (5), the cooling of capacitance group (6), thrust wheel support
The cooling of raceway sensing heating frock (3), lathe induction hardening transformer (5), electricity are connected to from water coolers (4) by high pressure resistant water pipe
In appearance group (6) and thrust wheel support raceway sensing heating frock (3), cistern is then flowed to by respective water return pipeline
(15)；
The quenching cooling of the workpiece is to be connected to thrust wheel support raceway quenching water spray from water coolers (4) by high pressure resistant water pipe
On the water inlet pipe (203) of quenching apparatus (2), cooling water supports raceway quenching water spray quenching apparatus by high-pressure water pipe, thrust wheel
(2) it is injected on workpiece, is returned to after workpiece is cooled down rapidly in cistern (15) after；
The machine operation console (7) connects and controls the operation of each several part；
The workpiece is the thrust wheel (1) after semifinishing；The thrust wheel support raceway quenching water spray quenching apparatus (2) includes
The casing (202) of arc hollow, for support raceway axle portion (114) quenching cooling arc surface water spray plate (204), for pair
Raceway axle portion (114) and the second support raceway shaft shoulder (116), thrust wheel chamfering intersection (118) is supported to quench the interior of cooling
Tapered sleeve water spray plate (201), and the water inlet pipe (203) being arranged on casing (202)；
Arc surface water spray plate (204) is arranged on the inner side of casing (202), and inner conical drogue water spray plate (201) is arranged on arc surface water spray
Plate (204) upper end, and form an entirety with casing (202)；
Array is provided with some hole for water sprayings on arc surface water spray plate (204), is gone into battle in the madial wall of inner conical drogue water spray plate (201)
Row are provided with some hole for water sprayings；
Inner conical drogue water spray plate (201) slopes inwardly in arc surface water spray plate (204) upper end；
The thrust wheel support raceway impewdance matching heating frock (3) includes cooling water inlet pipe (312), raised end face heating arc shape
Copper tube (301), the first silicon steel sheet magnetic conductor (302), support groove portion heats vertical copper tube (303), the second silicon steel sheet is led
Magnet (304), support groove portion heating arcuation spiral copper tube (305), the 3rd silicon steel sheet magnetic conductor (306), raised end face with
Support groove portion transition arc heating copper tube (307), cooling water outlet pipe (308), second electrode (309), first electrode
(310)；
Insulation board (311) is provided between second electrode (309), first electrode (310)；
First electrode (310), raised end face heating arc shape copper tube (301), support groove portion heat vertical copper tube (303),
Support groove portion heating arcuation spiral copper tube (305), raised end face and support raceway root transition arc heating copper tube
(307) and second electrode (309) is sequentially connected in series connection, forms a single-turn circular coil, the internal diameter of single-turn circular coil is more than excavator
Support the external diameter of groove portion；
The cooling water inlet pipe (312), raised end face heating arc shape copper tube (301), support groove portion heat vertical copper tube
(303) groove portion heating arcuation spiral copper tube (305), raised end face and support groove portion transition arc heating red copper, are supported
Pipe (307), cooling water outlet pipe (308) are sequentially communicated, and coil can be cooled down by cooling water；
It is enclosed with the first silicon steel sheet magnetic conductor (302) on the raised end face heating arc shape copper tube (301), U-shaped mouth is towards the
The one support raceway shaft shoulder (115)；
Support groove portion heats and the second silicon steel sheet magnetic conductor (304) is enclosed with vertical copper tube (303), U-shaped mouth direction support
Raceway axle portion (114)；
Raised end face on support raceway root transition arc heating copper tube (307) with being enclosed with the 3rd silicon steel sheet magnetic conductor
(306)；U-shaped mouth is supported on raceway shaft shoulder root circular arc (117) towards first.
2. a kind of technique of usage right requirement 1 quenching unit quenching for super-huge excavator support groove portion, its
It is characterized in comprising the following steps：
First, workpiece is put into Induction Hardening Machine by semi-finished thrust wheel (1) and fixed, secondly, use branch
Roller support raceway impewdance matching heating frock (3), to workpiece heat under 300-600Hz frequency, then, then uses Zhi Chong
Wheel support raceway quenching water spray quenching apparatus (2), using clear water as cooling medium, sprays to the thrust wheel raceway position heated
Water quick cooling.
3. a kind of technique of quenching unit quenching for super-huge excavator support groove portion as claimed in claim 2, its
It is characterized in, the material of the thrust wheel (1) is 4340 forged steel, and Tempering and Quenching, Zhi Chong after modifier treatment are carried out before impewdance matching
The case hardness for taking turns (1) is 220~250HB.
4. a kind of technique of quenching unit quenching for super-huge excavator support groove portion as claimed in claim 2, its
It is characterized in including step in detail below：
A. workpiece configurations prepare：Workpiece is carried out to quenched, quenched progress semifinishing afterwards, is that follow-up impewdance matching makees tissue standard
It is standby,
Semifinishing made allowance, support raceway axle portion (114), the first support raceway shaft shoulder (115) and the first support raceway axle
Shoulder root circular arc (117) surplus is 2~2.5mm, and support raceway axle portion (114) length surplus is 5~5.5mm, chamfering intersection
(118) radius of machining is 6mm circular arcs, all Ra1.6 μm of workpiece roughness；
Support in the range of raceway axle portion (114) termination, and the second support raceway shaft shoulder (116) 50mm, i.e. chamfering intersection
(118) up and down in the range of 50mm, it is polished with wheel polisher, it is ensured that be visible by naked eyes machining spur；
B. the fixation of workpiece：First raceway impewdance matching heating frock (3) is supported to be temporarily attached to lathe quenching transformation thrust wheel
On device (5), then workpiece thrust wheel (1) is placed on lathe, operation lathe is mobile by entablature (12), makes lathe entablature
(12) and intermediate transverse girder (13) it is upper and lower it is top head into thrust wheel centre bore, locked lathe intermediate transverse girder (13)；With workpiece branch
On the basis of roller (1), mobile induction hardening transformer (5) adjustment thrust wheel support raceway impewdance matching heating frock (3) and workpiece branch
Gap between roller (1) is 10~15mm, keeps workpiece and the suitable gap of coil to avoid producing short circuit sparking burn workpiece,
Coil and workpiece are arranged concentrically simultaneously, ensure that temperature is uniform during heating；The thrust wheel support raceway impewdance matching heating frock
(3) it is horizontal positioned；
Thrust wheel support raceway impewdance matching heating frock (3) and lathe induction hardening transformer (5) are fixed, two contact plate surfaces
Cleaning, non-oxidation phenomenon；Then water coolers (4) are connected with high-pressure water pipe and thrust wheel supports raceway impewdance matching heating frock
(3) water inlet pipe (312), will with the outlet pipe (308) of water pipe connection thrust wheel support raceway impewdance matching heating frock (3)
Water outlet is come in cistern (15)；
C., thrust wheel support raceway quenching water spray quenching apparatus (2) is installed：Thrust wheel support raceway is installed on the basis of workpiece to quench
Fire-fighting water quick cooling device (2), lower edge and the thrust wheel support raceway sensing of thrust wheel support raceway quenching water spray quenching apparatus (2)
The distance between upper edge of Quench heating frock (3) is 100~150mm；Ensure thrust wheel support raceway quenching water spray chilling dress
(2) and workpiece gap are put between 20~40mm, thrust wheel support raceway quenching water spray quenching apparatus (2) installation will ensure water
It is flat, and be fixed；With high-pressure water pipe connection water coolers (4) and thrust wheel support raceway quenching water spray quenching apparatus (2) institute
Some water inlet pipes (203)；
D. trial line charging：The number of turn for adjusting lathe induction hardening transformer (5) is 8:1, capacitance group (6) is 3.5；Open water coolers
(4) lead to the inlet valve of thrust wheel support raceway impewdance matching heating frock (3) on, confirm that water flowing is smooth, pressure 0.15
~0.2MPa；
Thrust wheel support raceway is partially placed into thrust wheel support raceway impewdance matching heating frock (3) by operation lathe, power transmission,
The frequency meter observed on lathe operating console (7), frequency is 450 ± 30Hz；
E. water is tried：Thrust wheel support raceway is partially placed into water spray quenching apparatus by operation lathe, is opened total valve, is adjusted import
Whether 0.2~0.3MPa of hydraulic pressure, rotational workpieces, observation cooling water are uniform, it is ensured that workpiece upper-lower position is sprayed by water, and tiltedly spray is whole
It is sprayed on the second support raceway shaft shoulder (116), closes valve；
F. thrust wheel support groove portion sensing heating：
First stage, referred to as initial period, operation lathe move down workpiece, support chamfering work piece intersection (118) and thrust wheel
Support groove portion in raceway impewdance matching heating frock (3) heat the distance between vertical copper tube (303) lower edge for 20~
25mm；The first support raceway shaft shoulder (115) adds with the support groove portion in thrust wheel support raceway impewdance matching heating frock (3)
On hot vertical copper tube (303) along the distance between be 30~40mm, 30 revs/min of rotational workpieces；
Power transmission, is transferred to 450kw by power in 30 seconds and is kept for 9 minutes or so, and support raceway axle portion is detected with far infrared temperature measurement instrument
(114) centre position in length (119) position, to support the centre position of raceway axle portion (114) far from end face 100mm, workpiece
900~920 DEG C of the temperature at centre position (119) place in raceway axle portion (114) length is supported, the stage is to supporting raceway axle portion
(114) heated；
Second stage, workpiece is moved up, chamfering work piece intersection (118) and thrust wheel is supported raceway impewdance matching heating frock
(3) it is substantially equal for 0~5mm that the support groove portion in heats the distance between vertical copper tube (303) lower edge；Chamfering is determined to hand over
At boundary at (118) chamfering surface temperature be 820~850 DEG C, the stage to second support the raceway shaft shoulder (116) radial penetration and
The temperature of chamfering intersection (118) carries out computer heating control；
Phase III, workpiece is moved down, the first support raceway shaft shoulder (115) is supported raceway impewdance matching heating frock with thrust wheel
(3) it is 10~15mm that the support groove portion in, which heats the distance between edge on vertical copper tube (303), determines first of workpiece
Support the raceway shaft shoulder (115), first 850~870 DEG C of the raceway shaft shoulder root circular arc (117) place surface temperature of support；The stage is pair
The first support raceway shaft shoulder (115) and the first support raceway shaft shoulder root circular arc (117) are heated；
Workpiece is moved up with 50mm~60mm/ component velocities, when chamfering intersection (118) position is quenched apart from thrust wheel support raceway sensing
The support groove portion of fire heating frock (3) stops power supply when heating on vertical copper tube (303) along at 50~60mm；
G. thrust wheel support groove portion cooling stage：Operation lathe workpiece continues to move up, make the first support raceway shaft shoulder (115) with
Along 20~80mm on thrust wheel support raceway quenching water spray quenching apparatus (2), stop movement；Then surveyed using far infrared temperature measurement instrument
It is rapid to open thrust wheel support raceway quenching water spray chilling when determining chamfering intersection (118) place's surface temperature to 790~810 DEG C
The valve of device (2), quick refrigeration is carried out to workpiece, it is desirable to which 0.2~0.3MPa of hydraulic pressure, workpiece is in thrust wheel support raceway quenching
The middle cooling of quenching apparatus (2) of spraying water 12~13 minutes, closes valve, stops cooling, and workpiece surface temperature is 40~50 after cooling
DEG C when, stop the rotation；
H. lower workpiece is hung, workpiece is turned around, repeats above-mentioned action, completes the quenching process of thrust wheel support groove portion.
5. a kind of technique of quenching unit quenching for super-huge excavator support groove portion as claimed in claim 2, its
It is 58~60HRC to be characterized in case hardness of the workpiece after quenching technical is heat-treated.
6. a kind of technique of quenching unit quenching for super-huge excavator support groove portion as claimed in claim 2, its
It is characterized in the workpiece after quenching technical is heat-treated, more than quench-hardened case 17mm.
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| CN201610600008.0A CN106011440B (en) | 2016-07-28 | 2016-07-28 | A kind of quenching unit and its technique for super-huge excavator support groove portion |
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| CN201610600008.0A CN106011440B (en) | 2016-07-28 | 2016-07-28 | A kind of quenching unit and its technique for super-huge excavator support groove portion |
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| CN106011441A (en) * | 2016-07-28 | 2016-10-12 | 石家庄新莱特机械轧辊有限公司 | Quenching equipment for support roller path part of oversized excavator |
| CN106755832A (en) * | 2016-12-16 | 2017-05-31 | 大连圣洁真空技术开发有限公司开发区分公司 | A kind of hardening apparatus by high frequency current |
| CN108870963B (en) * | 2018-07-12 | 2019-08-02 | 青岛泰家金属制品有限公司 | A kind of electromagnet smelting furnace |
| CN114672629B (en) * | 2022-04-21 | 2024-01-23 | 大连海洋大学 | Bearing raceway surface quenching device and method thereof |
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