CN101858272B - Diesel engine cylinder block of sedan and casting method thereof - Google Patents
Diesel engine cylinder block of sedan and casting method thereof Download PDFInfo
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- CN101858272B CN101858272B CN2009101139843A CN200910113984A CN101858272B CN 101858272 B CN101858272 B CN 101858272B CN 2009101139843 A CN2009101139843 A CN 2009101139843A CN 200910113984 A CN200910113984 A CN 200910113984A CN 101858272 B CN101858272 B CN 101858272B
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Abstract
The invention discloses a diesel engine cylinder block of a sedan and a casting method thereof. The diesel engine cylinder block of the sedan adopts vermicular cast iron materials; the thickness of the wall is 3mm, and the cylinder core distance is 86mm; the front end of the cylinder block is provided with an injection pump mounting flange and a gear chamber or a chain wheel chamber in the manner of directly casting; the rear end of the cylinder block is provided with a gear box connecting flange and a cranking motor mounting flange in the manner of directly casting. The targets of light-weight design and high strength of the thin-wall are realized by adjusting the formula of a vermiculizer and controlling the smelting and pouring techniques; a water jacket sand core adopts an integral structure; the pouring manufacturability is favorable; the casting mode with a gadarene cylinder top is adopted to ensure the precision of water jacket casting; the casting mould of a full-cold core is adopted; the casting mould can be painted with high-temperature resistant coatings; a sand mould has high strength and rigidity and high precision; and the casting mould has little gas evolution, thus ensuring the precision of thin-walled cylinder block castings and effectively reducing casting defects.
Description
Technical field
The present invention relates to cylinder of diesel engine and casting method thereof, relate in particular to a kind of diesel engine cylinder block of sedan and casting method thereof.
Background technique
In order to reduce fuel consume and to reduce CO2 emission, the lightweight of automobile has become one of many focuses of being paid close attention to.Lightweight especially improves the effective way of vehicle fuel economy, there are some researches show, and the every minimizing 10% of automobile unladen mass, fuel economy can improve 3%-5%, reduces discharging about 10% simultaneously.Simultaneously, lightweight can also improve the power character of car load, saves material, reduces cost.
As the motor of automobile core parts, with the volume maximum of cylinder block, weight is the heaviest in its component, and it is with each mechanism of motor, each system assembles all-in-one-piece basic element of character.The light-weight design exploitation of cylinder block has become an important problem naturally.
As one of most important parts in the motor, the cylinder block size is bigger, complex structure, wall thickness is thin and often inhomogeneous, and it is bad and have under solid particle and the aggressive medium working condition and do the high speed relative movement in high temperature, high pressure and lubricating condition, very big mechanical stress and the thermal stress of its inner generation born strong fretting wear simultaneously.Therefore, require the cylinder block material to have good comprehensive performances, comprise good obdurability, thermal conductivity, wear resistance, corrosion resistance, process industrial art performance and Economy.In addition, along with the specific power of motor is increasing, cause the operating temperature of engine cylinder more and more higher, a lot of positions temperature surpasses 200 ℃, and this just requires cylinder block that enough intensity must be arranged, and can bear high mechanical load and heat load.
The performance of aluminum alloy has reached light weight, intensity height, corrosion resistant requirement, but the intensity temperature influence of aluminum alloy is bigger, and its intensity descends rapidly when operating temperature surpasses 200 ℃, is not enough to bear high mechanical load.Along with the raising of motor specific power and reinforcing degree, aluminum alloy is used as the cylinder block material and is restricted.
Traditional gray cast iron, alloy cast iron material are owing to have good casting technique performance and mechanical property, and superior wear resistance, vibration damping and thermal conductivity are widely used as the cylinder block material.But along with the raising of car load lightweight development and motor specific power, its application limit is increasing, main cause be present technical merit make thin-walled thick only for this body section difference of hardness＜40HBS of 3-5mm, organize and fine and closely wovenly evenly be difficult to; The existence of flake graphite simultaneously makes that continuing to improve intensity, toughness and wear resistance in order to satisfy higher usage requirement becomes very difficult, is difficult to realize thin-wall high intensity, lightweight cylinder block.
For passenger car diesel, the cylinder block technology especially needs to consider the raising of lightweight and structural strength.The graphite form of vermicular cast iron is compared with flake graphite, and length is shorter and thick, and the end is round, slenderness ratio is (gray cast iron is generally 50～100) below 10, and rough surface, the end of circle can suppress the generation and the expansion of crackle, the disengaging of coarse surface energy restriction graphite.The graphite form of this uniqueness can improve performances such as tensile strength, fatigue strength, Young's modulus and wear resistance greatly.In addition, the metallographic structure of vermicular cast iron has a basket network structure, the basket network structure-reinforced the tissue of vermicular cast iron, make vermicular cast iron have the favorable mechanical performance, when bearing lubrication friction, magnesium iron basket network projection, recessed and the oil storage of the black eutectic cell of wriggling, thus make vermicular cast iron have good abrasion resistance.These characteristics have determined that vermicular cast iron is a kind of desirable cylinder block material, and it has the intensity of spheroidal graphite cast iron, compare with gray cast iron and similar vibrationproof, the capacity of heat transmission and castability are arranged, and than gray cast iron better plasticity and fatigue performance are arranged; Simultaneously can realize thin-wall light-weighted target.
In addition, traditional small diesel engine cylinder block forging type generally adopts the gravity-assist pouring mode of cylinder level, and comparatively speaking, the material density at cylinder block top and cylinder position is poor, and casting defect is more, thereby yield rate is low, the manufacture cost height; While, the requirement of strength of foundry goods was more and more higher along with the passenger car diesel specific power improves constantly, and this traditional pouring type more and more can not satisfy high-intensity requirement.In addition, the hot core of the general employing of traditional casting mold, its distortion is big, cause energy consumption big simultaneously, and manufacturing efficiency is low relatively.
Summary of the invention
At the deficiencies in the prior art, the invention provides a kind of diesel engine cylinder block of sedan, this cylinder block has characteristics such as thin-walled light weight, intensity height.Simultaneously, the present invention also provides a kind of diesel engine cylinder block of sedan casting method, and this method can cast out high-quality thin-walled light weight diesel engine cylinder block of sedan.
Diesel engine cylinder block of sedan of the present invention adopts vermicular graphite iron material, and by using two kinds of vermiculizers of rare earth ferrosilicomagnesium and rare earth ferrosilicon simultaneously, wherein rare earth ferrosilicomagnesium vermiculizer consumption is 0.2%～0.3% of an iron liquid mass fraction; Rare earth ferrosilicon vermiculizer consumption is 0.3%～0.5% (according to the sulfur content of hot metal adjustment) of iron liquid mass fraction, and the main position of foundry goods nodulizing rate is controlled between 80%～95%.
Diesel engine cylinder block of sedan of the present invention, wall thickness are 3mm, and cylinder core distance is 86mm, and the length of cylinder block * wide * height (mm) is: 413.4 * 464.2 * 225.6, and thin-walled, overall dimension are little, in light weight, and the car load suitability is good relatively.
Diesel engine cylinder block of sedan of the present invention is arranged required oil duct, water channel, reinforcing rib structure, and the structural rigidity of cylinder block, intensity satisfy the high specific power requirement of realization.
In the diesel engine cylinder block of sedan casting technique of the present invention, realized thin-wall light-weighted, high-intensity target by consumption, the control pouring technology of adjusting two kinds of vermiculizers.Cylinder block casting adopts cylinder top gravity-assist pouring mode down to pour into a mould, wherein, adopt sand core of water jacket to adopt monolithic construction, pouring technology is good, guarantee the consistency of casting accuracy and the cylinder block top and the cylinder part material of water jacket, thereby can satisfy the high strength requirement; Adopt full cold core casting mold in addition, this casting mold can spray high-temperature resistant coating, sand mold intensity hardness height, precision height, and the casting mold gas forming amount is little, thereby guarantees the precision of thin cylinder body foundry goods, and has controlled casting defect to greatest extent.
In the diesel engine cylinder block of sedan casting technique of the present invention, the cylinder block front end directly casts out the mounting flange of Injection Pump, and directly casts out gear chamber or sprocket wheel chamber; The rear end directly casts out the mounting flange of gearbox adpting flange and actuating motor, the general structure compactness, and assembly process process is good.
In the diesel engine cylinder block of sedan casting technique of the present invention, the hardness of working position, cylinder hole is further improved by plasma quenching in position, cylinder hole, realizes no cylinder sleeve manufacturing, has further reduced the complete machine cost.
Because adopt above-mentioned technological scheme, the present invention has following beneficial effect:
1, the cylinder block overall dimension is little, compact structure, and wall is thin, has realized the lightweight target, and the car load suitability is good relatively;
2, adopt vermicular graphite iron material, use by two kinds of vermiculizer allotments, the main position of foundry goods nodulizing rate reaches 80%～95%, has realized high-strength thin-walled casting.And by adopt the cylinder top down, the pouring technology of integral water jacket core and full cold core casting mold, improved tensile strength, fatigue strength, Young's modulus and the wear-resisting property of cylinder block greatly;
3, thin-walled, lightweight casting, and adopt cylinder hole plasma quenching to realize that no cylinder sleeve manufacturing has reduced the complete machine manufacture cost effectively;
4, Cheng Shu wriggling, pouring technology can be applied to the manufacturing of high-power type cylinder block and cylinder head.
Description of drawings
Fig. 1 is the front end axis side view of diesel engine cylinder block of sedan of the present invention;
Fig. 2 is the plan view of diesel engine cylinder block of sedan of the present invention;
Fig. 3 is the A-A generalized section of Fig. 2;
Fig. 4 is the B-B generalized section of Fig. 2;
Fig. 5 is the worm's eye view of diesel engine cylinder block of sedan of the present invention;
Fig. 6 is the rear end axis side view of diesel engine cylinder block of sedan of the present invention.
Wherein: 11-gear chamber or sprocket wheel chamber, 12-Injection Pump mounting flange, the mounting flange of 13-gearbox adpting flange and actuating motor, 3-cylinder block wall thickness (being 3mm).
Embodiment
The invention discloses a kind of diesel engine cylinder block of sedan, adopt vermicular graphite iron material, by using two kinds of vermiculizers of rare earth ferrosilicomagnesium and rare earth ferrosilicon simultaneously, wherein rare earth ferrosilicomagnesium vermiculizer consumption is 0.2%～0.3% of an iron liquid mass fraction; Rare earth ferrosilicon vermiculizer consumption is (according to the sulfur content of hot metal adjustment) of 0.3%～0.5% iron liquid mass fraction, and the main position of foundry goods nodulizing rate is controlled between 80%～95%.The prescription of two kinds of vermiculizers can be determined by related domain knowledge.
Realized thin-wall light-weighted, high-intensity target by the control pouring technology simultaneously, the cylinder block wall thickness is 3mm.Cylinder block casting adopts cylinder top gravity-assist pouring mode down to pour into a mould, wherein, adopt sand core of water jacket to adopt monolithic construction, pouring technology is good, guarantee the consistency of casting accuracy and the cylinder block top and the cylinder part material of water jacket, thereby satisfied the high strength requirement; Adopt full cold core casting mold in addition, this casting mold can spray high-temperature resistant coating, sand mold intensity hardness height, precision height, and the casting mold gas forming amount is little, thereby guarantees the precision of thin cylinder body foundry goods, and has controlled casting defect to greatest extent.The cylinder block front end directly casts out the mounting flange of Injection Pump, and directly casts out gear chamber or sprocket wheel chamber; The rear end directly casts out the mounting flange of actuating motor, the general structure compactness, and assembly process process is good.The various oil ducts of reasonable Arrangement, water channel, stiffening rib, structural rigidity, intensity satisfy realizes high specific power requirement.Simultaneously, the hardness of working position, cylinder hole is further improved by plasma quenching in position, cylinder hole, realizes no cylinder sleeve manufacturing, has further reduced the complete machine cost.
The present invention is described in detail below in conjunction with accompanying drawing.
To shown in Figure 6, the diesel engine cylinder block of sedan of the embodiment of the invention, wall thickness are 3mm as Fig. 1; Cylinder core distance only is 86, and overall dimension is little, in light weight, and long * wide * high (mm) is 413.4 * 464.2 * 225.6.
The cylinder block front end directly casts out the mounting flange 12 of Injection Pump, and directly casts out gear chamber or sprocket wheel chamber 11; The rear end directly casts out the mounting flange 13 of gearbox adpting flange and actuating motor, the general structure compactness, and assembly process process is good.
The various oil ducts of reasonable Arrangement, water channel, stiffening rib, the structural strength of cylinder block satisfy realizes high specific power requirement.
Diesel engine cylinder block of sedan of the present invention, realized thin-wall light-weighted, reach the superior targets of combination property such as intensity, rigidity, toughness, wear resistance, meet the auto trend that reduces discharging, reduction oil consumption, improves power and increase travelling comfort, simultaneously manufacture cost is low relatively, can wide popularization and application in the manufacturing of diesel engine cylinder block of sedan and high-power type cylinder block and head.
It should be noted that at last: above embodiment only in order to the explanation the present invention and and unrestricted technological scheme described in the invention; Therefore, although this specification has been described in detail the present invention with reference to each above-mentioned embodiment,, those of ordinary skill in the art should be appreciated that still and can make amendment or be equal to replacement the present invention; And all do not break away from the technological scheme and the improvement thereof of the spirit and scope of the present invention, and it all should be encompassed in the claim scope of the present invention.
Claims (6)
1. diesel engine cylinder block of sedan, it is characterized in that: described diesel engine cylinder block of sedan adopts vermicular graphite iron material, use two kinds of vermiculizers of rare earth ferrosilicomagnesium and rare earth ferrosilicon simultaneously, wherein rare earth ferrosilicomagnesium vermiculizer consumption is 0.2%～0.3% of an iron liquid mass fraction; Rare earth ferrosilicon vermiculizer consumption is 0.3%～0.5% of an iron liquid mass fraction, and the foundry goods nodulizing rate is controlled between 80%～95%.
2. according to the described diesel engine cylinder block of sedan of claim 1, it is characterized in that: described diesel engine cylinder block of sedan wall thickness is 3mm, and cylinder core distance is 86mm; The length of cylinder block * wide * height is that unit is of a size of with mm: 413.4 * 464.2 * 225.6.
3. according to claim 1 and 2 described diesel engine cylinder block of sedan, it is characterized in that: described diesel engine cylinder block of sedan is arranged required oil duct, water channel, reinforcing rib structure.
4. according to the described diesel engine cylinder block of sedan casting method of claim 1, it is characterized in that: described diesel engine cylinder block of sedan foundry goods adopts cylinder top gravity casting mode down to pour into a mould, and adopts the integral water jacket core, full cold core casting mold.
5. according to the described casting method of claim 4, it is characterized in that: the cylinder block front end directly casts out the mounting flange of Injection Pump, and directly casts out gear chamber or sprocket wheel chamber; The rear end directly casts out the mounting flange of gearbox adpting flange and actuating motor.
6. according to the described casting method of claim 4, it is characterized in that: the position, cylinder hole of described diesel engine cylinder block of sedan is carried out plasma quenching and is handled.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101139843A CN101858272B (en) | 2009-04-07 | 2009-04-07 | Diesel engine cylinder block of sedan and casting method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101139843A CN101858272B (en) | 2009-04-07 | 2009-04-07 | Diesel engine cylinder block of sedan and casting method thereof |
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| CN101858272A CN101858272A (en) | 2010-10-13 |
| CN101858272B true CN101858272B (en) | 2011-10-19 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103600021B (en) * | 2013-11-13 | 2015-07-01 | 中国石油集团济柴动力总厂成都压缩机厂 | Manufacturing technology for natural aerodynamic cylinder |
| CN104368762B (en) * | 2014-09-22 | 2016-04-27 | 广西玉柴机器股份有限公司 | The casting method of aluminum alloy diesel engine cylinder cap |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3485683A (en) * | 1966-12-15 | 1969-12-23 | Int Nickel Co | Method of heat treating a ductile austenitic ductile iron casting including refrigeration treatment and article produced thereby |
| CN85107725A (en) * | 1985-10-17 | 1986-07-23 | 陕西机械学院 | Make the vermicular cast iron of mould for glass bottle |
| CN87104138A (en) * | 1987-06-15 | 1988-10-12 | 北京工业大学 | A kind of vermiculizer and manufacture method thereof that is used to produce vermicular cast iron |
| CN101381838A (en) * | 2008-10-17 | 2009-03-11 | 河南省中原内配股份有限公司 | Vermicular cast iron cylinder liner and preparation method thereof |
-
2009
- 2009-04-07 CN CN2009101139843A patent/CN101858272B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3485683A (en) * | 1966-12-15 | 1969-12-23 | Int Nickel Co | Method of heat treating a ductile austenitic ductile iron casting including refrigeration treatment and article produced thereby |
| CN85107725A (en) * | 1985-10-17 | 1986-07-23 | 陕西机械学院 | Make the vermicular cast iron of mould for glass bottle |
| CN87104138A (en) * | 1987-06-15 | 1988-10-12 | 北京工业大学 | A kind of vermiculizer and manufacture method thereof that is used to produce vermicular cast iron |
| CN101381838A (en) * | 2008-10-17 | 2009-03-11 | 河南省中原内配股份有限公司 | Vermicular cast iron cylinder liner and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| JP昭60-247037A 1985.12.06 |
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