CN102407292A - Process for casting piston-ring blanks - Google Patents
Process for casting piston-ring blanks Download PDFInfo
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- CN102407292A CN102407292A CN2011104024887A CN201110402488A CN102407292A CN 102407292 A CN102407292 A CN 102407292A CN 2011104024887 A CN2011104024887 A CN 2011104024887A CN 201110402488 A CN201110402488 A CN 201110402488A CN 102407292 A CN102407292 A CN 102407292A
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Abstract
The invention discloses a process for casting piston-ring blanks. The process mainly comprises the steps of template manufacturing, sand mulling, modeling, smelting, casting, sand shakeout, blank sorting, cleaning and blank finishing; and a template used in the step of modeling is of a lantern ring structure, and a gas-ring model loop and an oil-ring model loop (the section modulus of a blank of the gas-ring model loop is close to that of the oil-ring model loop) are selected and bonded in one baseplate to carry out casting, therefore, on the basis of ensuring the stable product quality, the product yield and working efficiency of the casting process for piston-ring blanks can be significantly improved, and the production cost can be reduced.
Description
Technical field
The invention belongs to the casting technique in internal combustion engine and parts manufacturing technology field, particularly a kind of piston ring blank.
Background technology
Internal combustion engine is a kind of dynamic power machine, and it is through fuel is burnt at machine intimate, and directly converts its heat energy of emitting the Thermal Motor of power into.Internal combustion engine is a kind of broad-spectrum plant equipment, and piston ring is one of parts the most key in the I. C. engine.Piston ring divides by effect and mainly comprises compression ring and oil ring; Compression ring is used for mainly preventing that gas from leaking, and generally is made up of 2 to 3 road rings, and compression ring can be divided into flat ring, conical ring, twist type ring etc. according to section configuration; Oil ring has spill port or equivalent structure, can scrape machine oil from casing wall, and general oil ring adopts a kind of in common oil ring, steel band compound oil ring or the helical supporting spring compound oil ring.Piston ring has three effects greatly in Diesel engine, it passes to combustion chamber and crankcase seals on the cylinder wall with the heat energy on the piston, the controller oil consumption.Wherein, the main effect of helical supporting spring compound oil ring is cloth oil (preventing dry friction between piston ring and the cylinder sleeve) and controller oil consumption.Piston ring is the part of three direction motions of unique do in the Diesel engine, and its condition of work is quite abominable, should bear the effect of high temperature, high pressure, bears violent wearing and tearing and bigger impact load power again.The service life of engine, fuel economy and toxic emission will meet the environmental regulation requirement, and a lot of aspects all depend on structure, material and the quality bills of materials of piston ring.The quality of material depends on the quality of piston ring blank, and the manufacturing of existing piston ring blank is folded molding sand mold casting, and the template that is used to make sand mold has a down gate; In succession 2 again according to the size of model loop, 4 or 6 ingates, an ingate is connected with a model loop more then; With the sand mold that such plate moulding obtains, the blank quantity that after molten iron pouring, obtains is that an ingate can only be produced a piston ring blank, and the shortcoming of this casting method is; Rising head accounts for to such an extent that proportion is bigger; The casting technique yield rate is low, and cost is big, and operating efficiency is low.
Summary of the invention
The technical issues that need to address of the present invention provide and a kind ofly can improve piston ring blank yield rate and staff's operating efficiency, and the piston ring blank casting technique that can reduce production costs.
For solving the problems of the technologies described above, the technical scheme that the present invention adopted is.
The piston ring blank casting technique mainly comprises and makes template, mulling, moulding, cast and product technical process, and each technical process is operated by following method:
A. make template: according to piston ring cylinder diameter and piston model loop section factor, the needed collar template of design model; Said collar template comprises base plate; The compression ring model loop that base plate is provided with a down gate and is communicated with down gate through ingate; Said compression ring model loop is nested with and is provided with the oil ring model loop that diameter is complementary less than compression ring model loop, section factor and compression ring model loop; Be provided with the transition cast gate between compression ring model loop and the oil ring model loop, be provided with rising head on said compression ring model loop and the oil ring model loop;
B. mulling: be mixed and made into molding sand with quartz sand and bentonite;
C. moulding: the collar template that steps A is made is installed on the moulding machine, adopts the mixed molding sand of step B to make sand mold;
D. melting: the raw material that will make piston ring blank are placed on and carry out melting in the smelting furnace, form molten iron; The chemical composition of piston ring blank percentage composition is by weight counted: C:3.45 ~ 3.9%, and Si:2.25 ~ 2.65%, Mn:0.70 ~ 0.95%, P:0.30 ~ 0.50%, S≤0.05%, Cr:0.20 ~ 0.40%, Cu:0.20 ~ 0.50%, all the other are Fe and unavoidable impurities;
E. cast: in casting ladle, add the inovulant that casting ladle holds molten iron gross weight 0.3 ~ 0.6%; When the molten iron temperature in the smelting furnace reaches 1520 ~ 1540 ℃; Molten iron poured into molten iron is fully mixed with inovulant; The temperature of said cast is controlled to be 1380 ~ 1440 ℃, and the time that the cast of coming out of the stove finishes is controlled in the 5min;
F. knockout: when treating the foundry goods cool to room temperature in the sand mold, sand mold and blank are placed in the vibrating shakeout machine together, sand mold and foundry goods are separated, and the taking-up foundry goods;
G. produce: the foundry goods to from sand mold, taking out is distinguished by diameter, gets final product the oil ring blank of large diameter compression ring blank of output and minor diameter.
The performance requirement of molding sand adopts single molding sand among the step B according to the invention, and green compression strength is 1.5-1.8Kg/cm
2, green tensile strength is 160-200g/cm
2, hot green tensile strength is 10-12g/cm
2, compact rate of molding is 25-40%, gas permeability>=50, water content 3.5-4.5%, clay content≤13%; SiO2 in the described quartz sand>=98%, the granularity of quartz sand are 100 ~ 200 orders, refractoriness>=1700 ℃, clay content≤2%; Bentonitic granularity requirements 95% is crossed 200 mesh sieves, inhales per 100 grams of blue amount greater than 30 grams.
Make among the step C of the present invention behind the sand mold and stacked type cast form to be set with every group of sand mold is range upon range of.
Piston ring blank composition described in the step D of the present invention is divided into two types by the section factor of model loop:
When the section factor of model loop greater than 1.0 and belong to II class piston ring less than 1.2 the time, its blank composition is C:3.45 ~ 3.8%, Si:2.45 ~ 2.65%; Mn:0.75 ~ 0.95%; P:0.30 ~ 0.50%, S≤0.05%, Cr:0.20 ~ 0.40%; Cu:0.20-~ 0.50%, all the other are Fe and unavoidable impurities;
When the section factor of model loop belongs to I class piston ring greater than 1.2 the time, its blank composition is C:3.45-3.70%, Si:2.4-2.6%; Mn:0.70-0.90%, P:0.30-0.50%, S≤0.05%; Cr:0.20-0.40%, Cu:0.20-0.5%, all the other are Fe and unavoidable impurities.
The concrete control mode of the component content of fusion process is among the above-mentioned steps D: the fusion process described in the step D adopts the content of each composition of stokehold chemical examination means control; And the scaling loss amount according to 1% increases C content when raw material ratio; In the stove in the molten iron C content be controlled to be 3.55 ~ 4.0%, be adjusted to more than 3.55% when C content adds carbon dust less than 3.55% the time, be adjusted to below 4.0% when C content adds steel scrap greater than 4.0% the time;
In the stove in the molten iron Si content be controlled at 2.25-2.65%, in stove, add silicon metal or No. 75 ferrosilicon when Si content less than 2.25% the time, make Si content greater than 2.25%, in stove, add the Q10 pig iron or steel scrap when Si content greater than 2.65% the time, make Si content less than 2.65%.
Step G according to the invention comprises following operation:
A. blank sorting: with the foundry goods that separates in the step F, distinguish, be divided into the oil ring blank of large diameter compression ring blank and minor diameter according to diameter;
B. cleaning: the compression ring blank and the oil ring blank of output among the step a are put into shot-blast cleaning machine, the sand on blank surface is cleaned out;
C. hair is whole: detect the outward appearance of blank, the underproof piston ring blank of outward appearance is rejected.
Because the technological progress of having adopted technique scheme, the present invention to obtain is.
The template that uses in the moulding operation among the present invention adopts the big ring sleeve duvet structure of nested type; The blank raw material are segmentation control component content in fusion process; The blank quantity that the cast back is obtained has increased by one times before improving; Improve the casting technique yield rate greatly, reduced production cost.It is nested to adopt compression ring model loop that section factor is close and oil ring model loop to carry out in the template, is to use the molten iron of casting parameter with a kind of in order to pour into a mould, with acquisition metallographic structure and the qualified blank of mechanical performance.Piston ring blank metallographic structure accord with Q C/T 555-2000 " motorcycle, the metal lographic examination of the automobile engine inblock cast piston ring " standard that adopts the present invention to produce; Its mechanical performance all can reach GBT1149.3-2010 " internal-combustion engine piston ring MAT'L specification "; The blank that adopts invention to produce is made the piston ring constant product quality, satisfies the various performance indications of internal-combustion engine piston ring.
Description of drawings
Fig. 1 is the structural representation of collar template in the embodiment of the invention 1;
Fig. 2 is the metallographic structure figure of embodiment 1 φ 160 flat ring graphite;
Fig. 3 is the metallographic structure figure of embodiment 1 φ 160 flat cyclic group bodies;
Fig. 4 is the metallographic structure figure of embodiment 1 φ 102 oil ring graphite;
Fig. 5 is the metallographic structure figure of embodiment 1 φ 102 oil ring matrixes;
Fig. 6 is the structural representation of collar template in the embodiment of the invention 2;
Fig. 7 is the metallographic structure figure of embodiment 2 φ 130 flat ring graphite;
Fig. 8 is the metallographic structure figure of embodiment 2 φ 130 flat cyclic group bodies;
Fig. 9 is the metallographic structure figure of embodiment 2 φ 90 oil ring graphite;
Figure 10 is the metallographic structure figure of embodiment 2 φ 90 oil ring matrixes.
Wherein: 1. down gate, 2. transition cast gate, 3. compression ring model loop, 4. rising head, 5. oil ring model loop, 6. base plate, 7. ingate.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is explained further details.
Present embodiment is used to produce piston ring blank and the φ 102 oil ring blanks that cylinder diameter is 160mm, and each technical process is by following method operation.
A. make template: according to piston ring cylinder diameter and piston model loop section factor, the needed collar template of design model, described section factor are the ratio of the cross-sectional area and the section girth of piston ring.In the present embodiment because will produce the piston ring that cylinder diameter is 160mm; And according to the demand of embodiment, the compression ring of present embodiment adopts flat ring, so the one of the main divisions of the male role in traditional opera produces the flat ring model ring blank that diameter is 160mm; The principle that is complementary according to piston model loop section factor; The section factor of φ 160 flat ring model rings is 1.14, and the section factor of φ 102 oil ring model loops is 1.08, comparatively matees with it; Therefore when making collar template, the nested diameter of flat ring model ring blank of confirming to be employed in diameter and be 160mm is the oil ring model loop of 102mm.
The molten iron mold-filling capacity that forms in conjunction with the blank composition with solidify characteristics design present embodiment needed collar template in modeling process, and definite transition cast gate and the placement position of rising head in collar template, molten iron rationally fills type when guaranteeing to pour into a mould.
Collar template in the present embodiment comprises base plate 6, and base plate is provided with a down gate 1, and two flat ring model rings that are communicated with down gate 1 through ingate 7, all nested in each flat ring model ring an oil ring model loop 5 is set.The diameter of parallel model ring is than the big 58mm of diameter of oil ring model loop, between the every pair of flat ring model ring and the oil ring model loop transition cast gate 2 is set all, is provided with rising head 4 on flat ring model ring and the oil ring model loop.Be one group of casting mold unit with oil ring model loop of suit in the flat ring model ring on the collar template that relates among the present invention, two groups of casting mold unit are set in the present embodiment altogether, as shown in Figure 1.
B. mulling: be mixed and made into molding sand with quartz sand and bentonite.
The composition of molding sand and part by weight thereof do in the present embodiment.
Quartz sand all adopts new quartz sand, and new quartz sand is got 100 parts, and bentonite is got 15 parts.The content of SiO2>=98% in the quartz sand wherein, the granularity of quartz sand between 100 ~ 200 orders, refractoriness>=1700 ℃, clay content≤2%; Bentonitic granularity requirements 95% is crossed 200 mesh sieves, inhales per 100 grams of blue amount greater than 30 grams.
The molding sand component of above-mentioned requirements is put into puddle mixer carry out mulling, at first dried mixing after 1 ~ 2 minute added the water wet mixing 3 ~ 5 minutes again, in time adjusted the addition of bentonite and moisture then according to the performance of molding sand.Make the moulding-sand property that makes be: green compression strength is 1.6Kg/cm
2Green tensile strength is 160-200g/cm
2Hot green tensile strength is 10-12g/cm
2Compact rate of molding is 25-40%; Gas permeability>=50; Water content is 4.0%; Clay content is 13%.
Certainly the molding sand component that is adopted among the present invention can also adopt old quartz sand and bentonitic combination, also can be to adopt new quartz sand, old quartz sand and bentonitic combination.When adopting old quartz sand and bentonitic combination, old quartz sand is got 100 parts, and bentonite is got 0.5 ~ 1.5 part; When adopting new quartz sand, old quartz sand and bentonite combination, old quartz sand is got 90 ~ 98 parts, and new quartz sand is got 2 ~ 10 parts, and bentonite is got 1.5 ~ 8 parts.
C. moulding: the collar template that steps A is made is installed on the moulding machine, adopts the mixed molding sand of step B to make sand mold, make accomplish one case sand mold after, be placed on the sand mold of having made this case sand mold respective layer is folded, stacked type cast form is set.
D. melting: because the section factor of φ 160 flat ring model rings is 1.14 in the present embodiment, the section factor of φ 102 oil ring model loops is 1.08; The section factor of its model loop is all greater than 1.0 and less than 1.2, so model loop belongs to II class piston ring, and the Composition Control of piston ring blank is: C:3.45 ~ 3.8%; Si:2.45 ~ 2.65%, Mn:0.75 ~ 0.95%, P:0.30 ~ 0.50%; S≤0.05%; Cr:0.20 ~ 0.40%, Cu:0.20-~ 0.50%, all the other are Fe and unavoidable impurities.
According to the part by weight preparation raw material of above-mentioned chemical composition, before wherein the control of C, Si content is arranged on and gets into smelting furnace, and the scaling loss amount according to 1% increases C content when raw material ratio; Raw material is placed on carries out melting in the smelting furnace, form molten iron.
Fusion process adopts the content of each composition of stokehold chemical examination means control; In the stove in the molten iron C content be controlled to be 3.55 ~ 3.9%, be adjusted to more than 3.55% when C content adds carbon dust less than 3.55% the time, be adjusted to below 3.9% when C content adds steel scrap greater than 3.9% the time.In the stove in the molten iron Si content be controlled at 2.45-2.65%, in stove, add silicon metal or 75 ferrosilicon when Si content less than 2.45% the time, make Si content greater than 2.45%, in stove, add the Q10 pig iron or steel scrap when Si content greater than 2.65% the time, make Si content less than 2.65%.When adjusting Si content needs in smelting furnace, add the Q10 pig iron or steel scrap, must carry out preheating to the Q10 pig iron or steel scrap earlier, to satisfy the melting requirement of smelting furnace.
E. cast: in casting ladle, add the inovulant that casting ladle holds molten iron gross weight 0.4%; When the molten iron temperature in the smelting furnace reaches 1520 ~ 1540 ℃, molten iron is poured in the casting ladle, pour in the sand mold that stacks after making molten iron and inovulant fully mixing and pour into a mould; Pouring temperature is 1380 ~ 1440 ℃; The time that the cast of coming out of the stove finishes is controlled in the 5min, promptly in 5min, pours into a mould to finish, otherwise will make the metallographic structure of piston ring and performance not reach requirement.The inovulant that adopts in the present embodiment is a silicon strontium inovulant, and granularity is 1 ~ 3mm.
F. knockout: when treating the foundry goods cool to room temperature in the sand mold, sand mold and blank are placed in the vibrating shakeout machine together, sand mold and foundry goods are separated, and the taking-up foundry goods.
G. produce and comprise following operation.
A. blank sorting: the foundry goods to from sand mold, taking out is distinguished by diameter, can the output diameter be the flat ring blank of 160mm and the oil ring blank that diameter is 102mm.
B. cleaning: the flat ring blank and the oil ring blank of output among the step a are put into shot-blast cleaning machine, the sand on blank surface is cleaned out.
C. hair is whole: detect the outward appearance of blank, the underproof piston ring blank of outward appearance is rejected.
The flat ring blank of the φ 160mm of present embodiment institute output and the oil ring blank of φ 102mm, the metallographic structure of its graphite and matrix such as Fig. 2 ~ shown in Figure 5, its performance is as shown in table 1.
Table 1
Adopt conventional casting to produce the flat ring blank of 160mm cylinder diameter, its casting technique yield rate 37% like 1 ton of molten iron of melting, can be produced blank 370Kg, about 2300.And the collar template of the little ring of employing big ring sleeve in the present embodiment modeling process, in conjunction with the casting technique of present embodiment, 1 ton of molten iron of melting, but output φ 160 flat ring blank 297Kg; φ 102 oil ring blanks 169 Kg, each about 1870.Present embodiment is compared with existing casting technique, and the casting technique yield rate can bring up to 46.6%, and the molten iron effective rate of utilization improves 9.6%.Produce 100,000 φ, 160 flat ring blanks and 100,000 φ 102 oil ring blanks on year-on-year basis, utilize technology of the present invention, can save 9.86 tons of melting molten iron.Calculate with the required 1050 degree electricity of one ton of molten iron of every melting, but about 5694 yuan of conservation of power cost, and the stove consumption practices thrift 5%, reduces the stove consume and loses 900 yuan, adds up to and practices thrift 6594 yuan of costs.
Casting technique yield rate described in the present invention is the ratio of spray weight and spray weight and dead head weight sum.
Embodiment 2.
Present embodiment is used to produce piston ring blank and the φ 90 oil ring blanks that cylinder diameter is 130mm, and its compression ring model loop still adopts flat ring model ring, and processing step is identical with embodiment 1, and difference is.
Steps A: when making collar template, because the section factor 1.30 of φ 130 flat ring model rings in the present embodiment is got 90mm with the oil ring model loop diameter that φ 130 flat ring model ring section factors are complementary, the ring section factor of φ 90 oil ring model loops is 1.317.Therefore when making collar template, the nested diameter of flat ring model ring blank of confirming to be employed in diameter and be 130mm is the oil ring model loop of 90mm.
The collar template structure of present embodiment is different with embodiment 1; Present embodiment collar template comprises base plate; Base plate is provided with a down gate, and passes through four flat ring model rings that ingate 7 is communicated with down gate 1, and each flat ring model ring is nested with and is provided with an oil ring model loop 5.The diameter of parallel model ring is than the big 40mm of diameter of oil ring model loop, between the every pair of flat ring model ring and the oil ring model loop transition cast gate 2 is set all, is provided with rising head 4 on flat ring model ring and the oil ring model loop.Four groups of casting mold unit are set in the present embodiment altogether, as shown in Figure 2.
Step D: the section factor 1.30 of φ 130 flat ring model rings in present embodiment, φ 90 oil ring model loop section factors are 1.317, the section factor of its model loop is all greater than 1.2; Therefore belong to I class piston ring, the piston ring blank Composition Control is C:3.45-3.70%, Si:2.4-2.6%; Mn:0.70-0.90%, P:0.30-0.50%, S≤0.05%; Cr:0.20-0.40%, Cu:0.20-0.5%, all the other are Fe and unavoidable impurities.
According to the part by weight preparation raw material of above-mentioned chemical composition, before wherein the control of C, Si content is arranged on and gets into smelting furnace, and the scaling loss amount according to 1% increases C content when raw material ratio; Raw material is placed on carries out melting in the smelting furnace, form molten iron.
Fusion process adopts the content of each composition of stokehold chemical examination means control; In the stove in the molten iron C content be controlled to be 3.55 ~ 3.80%, be adjusted to more than 3.55% when C content adds carbon dust less than 3.55% the time, be adjusted to below 3.80% when C content adds steel scrap greater than 3.80% the time.In the stove in the molten iron Si content be controlled at 2.40-2.60%, in stove, add silicon metal or 75 ferrosilicon when Si content less than 2.4% the time, make Si content greater than 2.4%, in stove, add the Q10 pig iron or steel scrap when Si content greater than 2.60% the time, make Si content less than 2.60%.When adjusting Si content needs in smelting furnace, add the Q10 pig iron or steel scrap, must carry out preheating to the Q10 pig iron or steel scrap earlier, to satisfy the melting requirement of smelting furnace.
Step G: after the foundry goods that from sand mold, takes out is distinguished, but the output diameter is the flat ring blank of 130mm and the oil ring blank that diameter is 90mm.
The flat ring blank of the φ 130mm of present embodiment institute output and the oil ring blank of φ 90mm, the metallographic structure of its graphite and matrix such as Fig. 7 ~ shown in Figure 10, its performance is as shown in table 2.
Table 2
Adopt conventional casting to produce the flat ring blank of 130mm cylinder diameter, its casting technique yield rate 47% like 1 ton of molten iron of melting, can be produced blank 460Kg, about 4740.And the collar template of the little ring of employing big ring sleeve in the present embodiment modeling process, in conjunction with the casting technique of present embodiment, 1 ton of molten iron of melting, but output φ 130 flat ring blank 338Kg; φ 90 oil ring blank 262Kg, each about 3480.Present embodiment is compared with existing casting technique, and the casting technique yield rate can bring up to 60%, and the molten iron effective rate of utilization improves 14%.Produce 100,000 φ, 130 flat ring blanks and 100,000 φ 90 oil ring blanks on year-on-year basis, can save 11.2 tons of melting molten iron tonnages.Calculate with the required 1050 degree electricity of one ton of molten iron of every melting, but about 6468 yuan of conservation of power cost, and the stove consumption practices thrift 5%, reduces the stove consume and loses 1022 yuan, adds up to and practices thrift 7490 yuan of costs.
And the employing conventional casting is produced 100,000 φ, 130 flat ring blanks respectively and 100,000 φ 90 oil ring blanks needed for 64 man-hours; And after adopting technology of the present invention, produce above-mentioned blank and only use 46 hours, increase work efficiency 28.1%.
Claims (6)
1. piston ring blank casting technique mainly comprises and makes template, mulling, moulding, cast and product technical process, it is characterized in that each technical process operates by following method:
A. make template: according to piston ring cylinder diameter and piston model loop section factor, the needed collar template of design model; Said collar template comprises base plate (6); The compression ring model loop (3) that base plate is provided with a down gate (1) and is communicated with down gate (1) through ingate (7); Said compression ring model loop (3) is nested with and is provided with the oil ring model loop (5) that diameter is complementary less than compression ring model loop, section factor and compression ring model loop; Be provided with transition cast gate (2) between compression ring model loop and the oil ring model loop, be provided with rising head (4) on said compression ring model loop and the oil ring model loop;
B. mulling: be mixed and made into molding sand with quartz sand and bentonite;
C. moulding: the collar template that steps A is made is installed on the moulding machine, adopts the mixed molding sand of step B to make sand mold;
D. melting: the raw material that will make piston ring blank are placed on and carry out melting in the smelting furnace, form molten iron; The chemical composition of piston ring blank percentage composition is by weight counted: C:3.45 ~ 3.9%, and Si:2.25 ~ 2.65%, Mn:0.70 ~ 0.95%, P:0.30 ~ 0.50%, S≤0.05%, Cr:0.20 ~ 0.40%, Cu:0.20 ~ 0.50%, all the other are Fe and unavoidable impurities;
E. cast: in casting ladle, add the inovulant that casting ladle holds molten iron gross weight 0.3 ~ 0.6%; When the molten iron temperature in the smelting furnace reaches 1520 ~ 1540 ℃; Molten iron poured into molten iron is fully mixed with inovulant; The temperature of said cast is controlled to be 1380 ~ 1440 ℃, and the time that the cast of coming out of the stove finishes is controlled in the 5min;
F. knockout: when treating the foundry goods cool to room temperature in the sand mold, sand mold and blank are placed in the vibrating shakeout machine together, sand mold and foundry goods are separated, and the taking-up foundry goods;
G. produce: the foundry goods to from sand mold, taking out is distinguished by diameter, gets final product the oil ring blank of large diameter compression ring blank of output and minor diameter.
2. piston ring blank casting technique according to claim 1 is characterized in that: the performance requirement of molding sand adopts single molding sand among the said step B, and green compression strength is 1.5-1.8Kg/cm
2, green tensile strength is 160-200g/cm
2, hot green tensile strength is 10-12g/cm
2, compact rate of molding is 25-40%, gas permeability>=50, water content 3.5-4.5%, clay content≤13%; SiO2 in the described quartz sand>=98%, the granularity of quartz sand are 100 ~ 200 orders, refractoriness>=1700 ℃, clay content≤2%; Bentonitic granularity requirements 95% is crossed 200 mesh sieves, inhales per 100 grams of blue amount greater than 30 grams.
3. piston ring blank casting technique according to claim 1 is characterized in that: make among the step C behind the sand mold and stacked type cast form to be set with every group of sand mold is range upon range of.
4. piston ring blank casting technique according to claim 1, the composition that it is characterized in that piston ring blank described in the step D is divided into two types by the section factor of model loop:
When the section factor of model loop greater than 1.0 and belong to II class piston ring less than 1.2 the time, its blank composition is C:3.45 ~ 3.8%, Si:2.45 ~ 2.65%; Mn:0.75 ~ 0.95%; P:0.30 ~ 0.50%, S≤0.05%, Cr:0.20 ~ 0.40%; Cu:0.20-~ 0.50%, all the other are Fe and unavoidable impurities;
When the section factor of model loop belongs to I class piston ring greater than 1.2 the time, its blank composition is C:3.45-3.70%, Si:2.4-2.6%; Mn:0.70-0.90%, P:0.30-0.50%, S≤0.05%; Cr:0.20-0.40%, Cu:0.20-0.5%, all the other are Fe and unavoidable impurities.
5. according to claim 1 or 4 described piston ring blank casting techniques, it is characterized in that: the fusion process described in the step D adopts the content of each composition of stokehold chemical examination means control; And the scaling loss amount according to 1% increases C content when raw material ratio; In the stove in the molten iron C content be controlled to be 3.55 ~ 4.0%, be adjusted to more than 3.55% when C content adds carbon dust less than 3.55% the time, be adjusted to below 4.0% when C content adds steel scrap greater than 4.0% the time;
In the stove in the molten iron Si content be controlled at 2.25-2.65%, in stove, add silicon metal or No. 75 ferrosilicon when Si content less than 2.25% the time, make Si content greater than 2.25%, in stove, add the Q10 pig iron or steel scrap when Si content greater than 2.65% the time, make Si content less than 2.65%.
6. piston ring blank casting technique according to claim 1 is characterized in that said step G comprises following operation:
A. blank sorting: with the foundry goods that separates in the step F, distinguish, be divided into the oil ring blank of large diameter compression ring blank and minor diameter according to diameter;
B. cleaning: the compression ring blank and the oil ring blank of output among the step a are put into shot-blast cleaning machine, the sand on blank surface is cleaned out;
C. hair is whole: detect the outward appearance of blank, the underproof piston ring blank of outward appearance is rejected.
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| CN103451510A (en) * | 2013-08-21 | 2013-12-18 | 石家庄金刚凯源动力科技有限公司 | Manufacturing method of vermicular cast iron piston ring |
| CN104439209A (en) * | 2014-10-30 | 2015-03-25 | 山东恒圆精工部件股份有限公司 | Top box demolding mechanism and demolding method of piston ring elliptic cylinder workblank sand mold |
| CN115478207A (en) * | 2022-08-18 | 2022-12-16 | 南京飞燕活塞环股份有限公司 | Casting method of gray cast iron four-piece piston ring |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB484930A (en) * | 1936-11-19 | 1938-05-12 | William Arthur Oubridge | Improvements in and connected with the casting of piston and like metal packing rings |
| US20070039709A1 (en) * | 2005-08-19 | 2007-02-22 | Aikoku Alpha Corporation | Manufacturing method of titanium compressor wheel |
| CN101579722A (en) * | 2009-06-23 | 2009-11-18 | 鲍璐华 | Piston ring cylindrical shell cast pattern die machine and method for manufacturing pattern die |
| CN201470828U (en) * | 2009-07-02 | 2010-05-19 | 张永炤 | Disc form core for manufacturing air valve seat ring and casting die by adopting the disc form core |
-
2011
- 2011-12-07 CN CN 201110402488 patent/CN102407292B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB484930A (en) * | 1936-11-19 | 1938-05-12 | William Arthur Oubridge | Improvements in and connected with the casting of piston and like metal packing rings |
| US20070039709A1 (en) * | 2005-08-19 | 2007-02-22 | Aikoku Alpha Corporation | Manufacturing method of titanium compressor wheel |
| CN101579722A (en) * | 2009-06-23 | 2009-11-18 | 鲍璐华 | Piston ring cylindrical shell cast pattern die machine and method for manufacturing pattern die |
| CN201470828U (en) * | 2009-07-02 | 2010-05-19 | 张永炤 | Disc form core for manufacturing air valve seat ring and casting die by adopting the disc form core |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102699280A (en) * | 2012-06-30 | 2012-10-03 | 南车戚墅堰机车车辆工艺研究所有限公司 | Sand mould of precoated sand for casting single piston ring and manufacturing method of sand mould |
| CN102699280B (en) * | 2012-06-30 | 2013-11-27 | 南车戚墅堰机车车辆工艺研究所有限公司 | Sand mould of precoated sand for casting single piston ring and manufacturing method of sand mould |
| CN103451510A (en) * | 2013-08-21 | 2013-12-18 | 石家庄金刚凯源动力科技有限公司 | Manufacturing method of vermicular cast iron piston ring |
| CN103451510B (en) * | 2013-08-21 | 2015-08-12 | 石家庄金刚凯源动力科技有限公司 | The manufacture method of vermicular cast iron piston ring |
| CN104439209A (en) * | 2014-10-30 | 2015-03-25 | 山东恒圆精工部件股份有限公司 | Top box demolding mechanism and demolding method of piston ring elliptic cylinder workblank sand mold |
| CN104439209B (en) * | 2014-10-30 | 2016-08-17 | 山东恒圆精工部件股份有限公司 | The top case mould emptier of piston ring elliptical cylinder blank sand mold and release method thereof |
| CN115478207A (en) * | 2022-08-18 | 2022-12-16 | 南京飞燕活塞环股份有限公司 | Casting method of gray cast iron four-piece piston ring |
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| CN102407292B (en) | 2013-06-05 |
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