CN2607223Y - Continuous casting and forging machine for spherulitic iron gear - Google Patents

Continuous casting and forging machine for spherulitic iron gear Download PDF

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Publication number
CN2607223Y
CN2607223Y CN 02206835 CN02206835U CN2607223Y CN 2607223 Y CN2607223 Y CN 2607223Y CN 02206835 CN02206835 CN 02206835 CN 02206835 U CN02206835 U CN 02206835U CN 2607223 Y CN2607223 Y CN 2607223Y
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CN
China
Prior art keywords
casting
gear
forging
cast
ductile iron
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Expired - Fee Related
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CN 02206835
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Chinese (zh)
Inventor
姜东生
姜淑君
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Individual
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Individual
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Abstract

The utility model discloses a continuous casting and forging machine of bulb iron gear, which comprises an oil hydraulic press. A worktable is provided with a lower casting and forging die, and one side of the lower casting and forging die is provided with a pin which is provided with a pivoted arm mechanism; one end of the pivoted arm mechanism is provided with a casting ladle and an upper mould which is arranged below the casting ladle, and the other end of the pivoted arm mechanism is provided with an upper mould. The utility model realizes the continuous casting and forging processing of the bulb iron gear, which can improves the quality of the gear, and decreases energy source consumption and quantities of machining, and reduces manufacturing cost.

Description

Ductile iron gear is cast the forging machine continuously
Technical field
The utility model relates to a kind of casting and forges equipment, and particularly a kind of ductile iron gear is cast the forging machine continuously.
Background technology
At present, known ductile iron gear process technology all is that at first to make the gear hair by casting bad, and then carries out machining, or carries out machining after forging, and makes finished product at last.Wherein, the forging process of ductile iron gear generally is to forge machine by hydraulic press or gas, finishes on its workbench.For the Gear Processing technology that does not have forging process, its ductile iron gear casting flaw of making generally is difficult to eliminate, and the intensity and the hardness of gear are lower, and follow-up machining complex procedures.For the Gear Processing technology that forging process is arranged, the magnesium iron casting is to be undertaken by different equipment respectively with forging two kinds of operation processes, and its equipment investment is bigger, complex technical process, and energy resource consumption is big.
Summary of the invention
Technical problem to be solved in the utility model is, provides a kind of ductile iron gear to cast the forging machine continuously, forges operation to be implemented in the casting that an equipment carries out gear continuously, thereby eliminates the defective that prior art exists.
The utility model is that to solve this technical problem the technical scheme of employing as follows.
A kind of ductile iron gear is cast the forging machine continuously, comprise a hydraulic press, on workbench, have and cast forging die, be provided with a pin in a side of casting forging die down, pin is provided with a whirling arm mechanism, one end of whirling arm mechanism is provided with a casting ladle and a trussell, and trussell is positioned at the below of casting ladle, and the other end of whirling arm mechanism is provided with forging die on.
Wherein, described ductile iron gear is cast the forging machine continuously and is also comprised an air cooling system, is arranged on a side of workbench, and its air outlet is towards the casting working position.
Wherein, described ductile iron gear is cast the forging machine continuously and is also comprised a water tank, an insulation chute and an insulation groove, and water tank is provided with a nozzle, in the insulation chute.
Wherein, described ductile iron gear is cast the forging machine continuously and is also comprised a land surface pyrometer, is arranged on workbench one side.
Wherein, described insulation groove is filled with rice-straw ash or perlite.
Wherein, the inner surface of described trussell, last forging die and following casting forging die is coated with insulation layer and lubricating layer respectively.
The utlity model has following beneficial effect.
One, the rotation by whirling arm mechanism, casting forging die can cooperate with trussell and last forging die respectively under it, and then utilize the forging and pressing mechanism of described casting ladle and hydraulic press respectively, and cast and forge processing respectively, forge processing thereby be implemented in the continuous casting of finishing gear on the equipment.
Two, by forging processing, eliminated casting flaw, improved the gear internal organizational structure, improved the intensity and the hardness of gear, and and then can prolong service life of gear.
Three, forge processing continuously owing to realized casting, compare so forge the technology of carrying out separately respectively with traditional casting, forging process does not need independent heating, energy savings greatly.
Four, by adjusting mould and die accuracy and size, more mold exchange can produce the ductile iron gear that precision is higher relatively, can directly use, also can make medium accuracy, roughing tooth base when being equivalent to cut the system tooth carries out accurate gear hobbing on this basis again, finishes the processing of system tooth.Therefore, the utility model can reduce machining amount greatly, thereby reduces cost.
Five, simple in structure, easy to manufacture, be convenient to promote.
Description of drawings
Below in conjunction with accompanying drawing, describe the specific embodiment of the present utility model in detail.
Fig. 1 is the structural representation of a kind of embodiment of the utility model;
Among the figure, the 1-workbench; The 2-trussell; Casting forging die under the 3-; The 4-casting ladle; The 5-cast gate; The 6-thermometer; The 7-molten iron; 8-gear foundry goods; 8 '-gear forgings; The 9-whirling arm mechanism; The last forging die of 10-; The 11-pin; The 12-air cooling system; 13-is incubated chute; The 14-water tank; The 15-nozzle; 16-is incubated groove.
The specific embodiment
As shown in Figure 1.Casting forging machine described in the utility model comprises a hydraulic press, on hydraulic press workbench 1, have and cast forging die 3, be provided with a pin 11 in a side of casting forging die 3 down, pin 11 is provided with a whirling arm mechanism 9, one end of whirling arm mechanism 9 is provided with a casting ladle 4 and a trussell 2, trussell 2 is positioned at the below of casting ladle 4, and the other end of whirling arm mechanism 9 is provided with forging die 10 on.
It is that magnesium iron with liquid state is cast in the metal die die cavity on the casting forging machine that this ductile iron gear is cast the forging machine continuously, when being cooled to austenitizing temperature rapidly, by whirling arm mechanism 9 the first half of mold cavity is replaced by identical shaped die cavity by the trussell that has cast gate 2 of casting usefulness but height less than the last forging die 10 of the forging usefulness of trussell 2, then by the hydraulic press (not shown), the high temperature austenite magnesium iron matrix of crystallization just applies~fixed pressure in the casting forging die 3 downwards, after process short time pressurize, the lower impressions of mould, the following casting forging die 3 that promptly has the spill of the form of gear tooth is full of by the magnesium iron alloy of complete compact crystallization, thereby it is smooth to produce the flank of tooth, the precision height, the ductile iron gear of the high strength deformation that intensity is suitable with the high duty alloy pinion steel.
Casting ladle 4 wherein can be meter ladle or switching regulator bottom pour ladle, in order to cast high temperature molten ductile iron 7 in cast gate 5.The temperature of molten iron 7 should be more than 1450 ℃, to check chemical composition to meet the requirements through the stokehold before the cast and nodularization good.If casting ladle 4 is a meter ladle, it was poured into a mould in cast gate 5 with certain incline outflow and time, make liquid molten ductile iron be full of the die cavity space of 3 in trussell 2 and following casting forging die.
In addition, this is cast the forging machine continuously and also comprises an air cooling system 12, is arranged on a side of workbench 1, and its air outlet is towards the casting working position.Side at workbench also has a water tank 14 and an insulation groove 13, and the insulation groove is filled with rice-straw ash or perlite.Water tank 14 is provided with a nozzle 15, in the insulation chute.Best, this ductile iron gear is cast the forging machine continuously and is also comprised a land surface pyrometer 6, can be placed on the side of workbench.
The magnesium iron chemical composition that this special plane uses is the magnesium iron of carbon equivalent as hypoeutectic and eutectic structure, molten steel pouring temperature can adopt 1460 ℃, pour into a mould front mold first and should be preheating to 450 ℃ earlier, the continuous pouring casting can make mould keep 450 ℃~520 ℃ temperature when forging gear.
Since the fireballing chilling action of thin-walled metal mould cavity radiating, the refinement of graphite precipitate, the graphite sphere diameter is less than 20 μ m, and grain refinement is obvious.
Because a certain amount of tiny molten iron can cool off by nature in casting process, when speed is suitable, just shows the pressure head feeding that needs common casting.The gear foundry goods 8 that the cast gate of the of no help contractive pressure head of this employing waters is organized some expansion slightly, and proportion is near 7.2~7.3g/cm 3
As shown in fig. 1, through 15~30 seconds, duricrust was formed on the surface of die cavity middle gear foundry goods 8 after molten iron 7 cast, and most of matrix finishes in 1040 ℃ of crystallizations.By being positioned at the air cooling system 12 of workbench one side, compressed air is blowed to the casting position, make the temperature of gear foundry goods 8 be cooled to 960 ℃~980 ℃.Then,, trussell 2 is shifted to the left side side of hydraulic press workbench 1, and the last forging die IO that will be positioned at whirling arm mechanism 9 other ends moves on to down casting forging die 3 tops, aim at the center of mold cavity up and down by rotational positioning pin 11 by whirling arm mechanism 9.Last forging die 10 can be up and down, in order to forging rolling gear foundry goods 8.In 120~200 seconds subsequently time, by hydraulic press, with the pressure of the speed 80KPa of 0.04~0.06 millimeter of per second, to lower compression gear foundry goods 8, when the upper limb of the lower edge of last forging die 10 and following casting forging die 3 is closed, end, and ask when looking the height adjustment pressurize of isothermal temperature.10%~20% of the vertical height that all effective compression travel is a gear foundry goods 8.This compression process promptly is to implement the process of forging rolling.
It is simple in structure that this ductile iron gear is cast the forging machine continuously, easy to manufacture, and the pressure of hydraulic press did not need very highly when the isothermal forge hot of casting back was rolled, and both can use the product oil press, can make the hydraulic press of special use yet.The ductile iron gear and the forged steel gear of the general gravity-assist pouring casting of ductile iron gear that produces on casting forging machine have more tangible excellent in performance.Pass through 10%~20% volume compression in deformation process, the proportion of magnesium iron obviously increases, and the compactness of material increases significantly.
Wherein, the inner surface of described trussell 2, last forging die 10 and following casting forging die 3 can be coated with insulation layer and lubricating layer respectively, to prevent liquid magnesium iron sticking to mould.The prescription of this coating is silica flour 80 grams, waterglass 30 grams, 1 liter in water, 0.1~0.6 millimeter of coating thickness.Lubricating layer is 1 liter in a water, and carbon black 7 grams are brushed 20 times.
Owing to be liquid metal continuous pouring and forging rolling, whole technological processes is that time very compact to solidifying the back with isothermal forging rolling subsequently, the feature of waste heat isothermal heat treatment process from cast iron solution, a heating energy source utilization rate height, when saving a large amount of worker and electric power, be to realize that gear begins to the special mechanical equipment of finishing quick manufacturing from raw material.Ductile iron gear cast continuously the forging machine change on the hydraulic press workbench 1 different trussells 2, on the die cavity of forging die 10 and following casting forging die 3, can make the circular cone or the roller gear of various difformities and modulus.Precision and the dimensional parameters of adjusting mould can produce the directly ductile iron gear of operable high-precision gear teeth shape, also can make medium accuracy, the tooth base of rough lumber precision when being equivalent to cut the system tooth, and then carry out accurate rolling cut profile of tooth, finish the work of system tooth.
Gear is forged in casting for these two kinds of precision, the available machining of the manufacturing of its mould, model casting, the two sand system shell moulded casting method precision casting moulds of phenolic resins.
The material of mould can adopt heat-resisting high strength magnesium iron manufacturing.Specifically can be that chemical composition is the ferroalloy of multiple elements such as carbon containing 2.6%, silicon 8.3%, sulphur 0.3%, phosphorus 0.07%, manganese 0.55%, chromium 2.6%, nickel 2%.The mould of this material manufacturing can be worked in the high temperature of I000oC for a long time, and is indeformable, do not grow, do not produce during hot operation oxide skin, and generally be can cast to forge 600~1000 gears die life.The consumption of metal die only is 3~5 kilograms/ton.The feature that the design casts the mould of the smart casting of the high silicon magnesium iron of this heat-resisting high chromium that the forging machine uses is that the cost than high alloy high-quality mould steel such as 3Cr2W8 steel significantly reduces, implement easily, very convenient when remodeling is changed the mould of different product, standing charges are low, making this casting forge machine can normally move enduringly.
Thisly use earlier die cast, and then through the ductile iron gear of forging rolling, the lattice generation dislocation of its crystal inside is overlapping, has increased the compactness of material greatly and improved the intensity of magnesium iron material.Utilize casting described in the utility model to forge mach ductile iron gear, mechanical property is good, and is suitable with the gear performance of high-quality gear alloy steel forging machining cutting, and particularly tensile strength is higher than superior alloy steel, and fatigue strength increases more than 30%.In the actual use of gear since ductile iron gear through isothermal hardening, matrix is the austenite lower bainite, the hardness heart portion of whole gear and surface are in full accord, dark about 1~2 millimeter high rigidity district that gear surface is only arranged unlike steel gear, centre hardness is then lower, in case the outer surface of sclerosis peels off in using, just can cause big rapidly and long-pending breakage and make whole gear failure.And ductile iron gear can be damaged in flank of tooth part or be the requirement that can satisfy harsh working environment during even defectiveness, even still can satisfy instructions for use when big step appears in the long term wear tooth root.Deflection is also less than steel gear during heat treatment, and noise is little during use, the level of suitable high class gear, and long service life, noise-less pollution, manufacturing cost and use cost significantly reduce.
The method of forging the isothermal heat treatment acquisition austempered ductile iron of gear about casting has dual mode available, the first makes gear forgings 8 ' naturally cool to room temperature after finishing forging and pressing, send into saline solution or air-heating furnace again, be heated to 880 ℃~910 ℃, be incubated in 260 ℃~350 ℃ the isothermal nitrate groove quenched after 30~45 minutes isothermal 60~90 minutes; The method of another kind of energy savings is to utilize at the insulation chute 13 shown in Fig. 1, with the nozzle on the cooling fluid water tank 14 15 to gear forgings 8 ' the rapidly cooling of spraying, the temperature of use land surface pyrometer 6 prototype gear foundry goods 8 ' pushes when dropping to 260 ℃~350 ℃ insulation in the perlitic insulation groove 17 is housed, carry out isothermal hardening 2~4 hours, and finished the austenite bainite transformation.The utility model is very tangible from gravity-assist pouring to finishing the heat treated whole technical process saving energy of isothermal, and excellent magnesium iron quality also is that general casting method is incomparable.
This is a large amount of special use casting forging hot-working plant equipment that suit of producing of modern industry of an economic benefit and obvious social benefit in a word, and applying this special plane has wide space.

Claims (6)

1, a kind of ductile iron gear is cast the forging machine continuously, it is characterized in that, comprise a hydraulic press, on workbench, have and cast forging die, be provided with a pin in a side of casting forging die down, pin is provided with a whirling arm mechanism, and an end of whirling arm mechanism is provided with a casting ladle and a trussell, trussell is positioned at the below of casting ladle, and the other end of whirling arm mechanism is provided with forging die on.
2, ductile iron gear as claimed in claim 1 is cast the forging machine continuously, it is characterized in that, also comprises an air cooling system, is arranged on a side of workbench, and its air outlet is towards the casting working position.
3, ductile iron gear as claimed in claim 1 is cast the forging machine continuously, it is characterized in that, also comprises a water tank, an insulation chute and an insulation groove, and water tank is provided with a nozzle, in the insulation chute.
4, ductile iron gear as claimed in claim 3 is cast the forging machine continuously, it is characterized in that, also comprises a land surface pyrometer, is arranged on workbench one side.
5, ductile iron gear as claimed in claim 3 is cast the forging machine continuously, it is characterized in that, described insulation groove is filled with rice-straw ash or perlite.
6, ductile iron gear as claimed in claim 1 is cast the forging machine continuously, it is characterized in that, the inner surface of described trussell, last forging die and following casting forging die is coated with insulation layer and lubricating layer respectively.
CN 02206835 2002-02-08 2002-02-08 Continuous casting and forging machine for spherulitic iron gear Expired - Fee Related CN2607223Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 02206835 CN2607223Y (en) 2002-02-08 2002-02-08 Continuous casting and forging machine for spherulitic iron gear

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 02206835 CN2607223Y (en) 2002-02-08 2002-02-08 Continuous casting and forging machine for spherulitic iron gear

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CN2607223Y true CN2607223Y (en) 2004-03-24

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101006189B (en) * 2004-08-18 2011-05-18 毕晓普创新有限公司 Method of manufacturing a hardened forged steel component
CN104139169A (en) * 2013-10-31 2014-11-12 国家电网公司 Casting and forging method and casting and forging device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101006189B (en) * 2004-08-18 2011-05-18 毕晓普创新有限公司 Method of manufacturing a hardened forged steel component
CN104139169A (en) * 2013-10-31 2014-11-12 国家电网公司 Casting and forging method and casting and forging device
CN104139169B (en) * 2013-10-31 2017-01-11 国家电网公司 Casting and forging method and casting and forging device

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C19 Lapse of patent right due to non-payment of the annual fee
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