CN1333104A - Method for producing cast iron cylinder jacket of diesel engine - Google Patents
Method for producing cast iron cylinder jacket of diesel engine Download PDFInfo
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- CN1333104A CN1333104A CN 00111206 CN00111206A CN1333104A CN 1333104 A CN1333104 A CN 1333104A CN 00111206 CN00111206 CN 00111206 CN 00111206 A CN00111206 A CN 00111206A CN 1333104 A CN1333104 A CN 1333104A
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Abstract
The production method of cast-iron diesel engine cylinder jacket includes the processes of making blank, machining-forming and plasma beam scanning and quenching, and is characterized by adopting polystyrene foam plastics and making it foam in cylinder jacket mould to form a dissolvable mould with cylinder jacket shape, applying alloy penetrating agent and fire-proof coating, embedding it into molding box, sealing and evacuating, pouring molten iton while evacuating and condensing so as to obtain the invented blank. As compared with the centrifugal casting process, the cylinder jacket blank produced by said invented method is light in weight, has no casting inner stress, its internal and external structure is compact and uniform, its production cost is low and wear-resisting property is good.
Description
The present invention relates to a kind of production method of cast iron cylinder jacket of diesel engine, belong to mechanical manufacturing field.Diesel engine is more and more higher to the requirement of oil consumption, noise, service life, exhaust emission, reliability and deadweight, and manufacturing cost constantly descends, and plays a part crucial as the cylinder jacket of diesel engine heart component.
The general manufacture method of cast iron cylinder cover is at present: cast out blank with centrifugal casting, stress relief annealing, machining moulding.The defective of said method is: 1.. because action of centrifugal force causes cylinder liner blank interior thin outer close, cylinder sleeve bore has casting flaws such as a large amount of pores, loose, slag inclusion, foundary loss rate height, in order thoroughly to excise these defectives, certainly will increase the wall thickness of cylinder sleeve, waste material, increased machining amount and processing percent defective; 2.. the cooling velocity difference of cylinder sleeve bore and outer wall is big during owing to casting, cause cast sturcture inhomogeneous, the casting internal stress is big, must eliminate internal stress annealing, further increased cost, and easily produce the spoken parts in traditional operas waste product, be restricted improving cylinder sleeve intensity and the favourable anti-graphitization alloying element of wearability for fear of producing spoken parts in traditional operas, make to add; 3.. can not cast out the periphery of step, need to process the cylindrical step of cylinder sleeve, further increase the cutting cost, and lose fine grain structure layer the favourable cylinder sleeve extexine densification of intensity and corrosion resistance with the method for machining; 4.. because the machining amount is big, stock utilization is low, makes heavy alloyed high-strength, high-anti-friction cylinder jacket cost is sharply raise.
The patent No. is the utility model patent " cylinder jacket of diesel engine of beam-plasma sclerosis " of ZL97020313.5, the cylinder jacket that a kind of internal layer contains the beam-plasma hardened layer of thickness＞0～0.16mm has been proposed, its hardened layer is an atmospheric plasma quenching beam hardened layer, it perhaps is atmospheric plasma bundle fusing hardening layer, it perhaps is atmospheric plasma bundle multicomponent thermochemical treatment alloy hardened layer, improve the wearability of cylinder jacket, but do not related to cylinder sleeve casting and machining moulding method.
The objective of the invention is to overcome the deficiency of above-mentioned method for manufacturing cylinder jacket, propose a kind of production method of cast iron cylinder jacket of diesel engine.
Implementation step of the present invention is:
1, use styrofoam as disappearance mould raw material in the cylinder jacket mould, foaming is produced polystyrene cylinder jacket disappearance mould, and is stained with running channel and cast gate at suitable position;
2, evenly apply the alloy casting penetration enhancer that a layer thickness is 0.5～2mm at disappearance mould bore area, and then the whole aluminium vanadine fireproof coating that applies a layer thickness＞0～2mm, above-mentioned alloy casting penetration enhancer can be the ferrochrome powder, also can be by percentage by weight be respectively 80～100% ferrochrome powder, 1～10% rare earth powder, 1～10% copper powder does not add glue and evenly mixes;
3, above-mentioned disappearance mould is imbedded in the dried quartz sand of casting in the sandbox, sandbox all will seal except that cast gate, vacuumizes after the sealing, the pouring molten iron while bleeding, the cylinder sleeve mould runs into red-hot molten iron moment gasification and disappears, and molten iron occupies the space of cylinder sleeve mould, forms the Cast iron liner blank after the condensation;
4, cylinder liner blank removes machining moulding behind the cast gate;
5, the process for quenching cure process is scanned with beam-plasma in moulding cylinder sleeve bore surface.
The cast iron cylinder jacket of diesel engine of producing with aforementioned production method produces following good effect:
1, do not have the casting internal stress, inside and outside dense structure is even, close defective outside interior the dredging of no centrifugal casting, and the foundary loss rate is low, does not have the casting internal stress, and the elimination internal stress annealing after need not to cast can or not installed and not used in processing and be produced stress deformation in the process;
2, endoporus oozes the high alloy layer for casting, effectively utilized valuable alloying element, after quenching, beam-plasma scanning forms the wear resistant friction reducing layer that one deck contains a large amount of alloy martensites, alloy carbide, the high temperature resistance high speed polishing machine of cylinder jacket, anticorrosive polishing machine and wear-resistant grain polishing machine are had clear improvement, and significantly improve the service life of cylinder jacket.
3, cylinder sleeve is the hot investment casting moulding, and the stock utilization height cooperates fitting surface allowance little, has improved working (machining) efficiency and processed finished products rate, has reduced processing cost, and non-cooperation fitting surface has kept the casting thin crystal layer, has improved the intensity and the corrosion resistance of cylinder sleeve;
4, the cylinder sleeve total cost of production reduces more than 30%, and improve 0.5 times or more than the cylinder sleeve that classical production process adds the beam-plasma processing service life.
Embodiment: use styrofoam as disappearance mould raw material in 95 diesel engine cylinder jacket moulds, foaming is produced 95 type polystyrene cylinder jacket disappearance moulds, is stained with the running channel and the cast gate of polyrod making at an end of disappearance mould.In upper port 60mm scope, evenly apply the alloy casting penetration enhancer that a layer thickness is about 1mm at cylinder sleeve disappearance mould bore area, consisting of of alloy casting penetration enhancer: the ferrochrome powder of 90% (percentage by weight), 5% rare earth powder, 5% copper powder evenly are not in harmonious proportion with glue.Treat that whole after the alloy casting penetration enhancer layer drying to apply a layer thickness be the aluminium vanadine fireproof coating of 1mm, in 50～60 ℃ drying box, dry, disappearance mould and running channel integral body are imbedded in the interior dried quartz sand of 40 purposes of sandbox, only expose the cast gate upper surface on the sand face, whole sand face is laid layer of plastic film, and place and waters cup at the cast gate place of appearing on plastic sheeting.Start vavuum pump sandbox is vacuumized, pour into molten iron expires until watering while vacuumizing, and treats after the condensation Cast iron liner to be poured out, and carries out the machining moulding, on cylinder jacket beam-plasma quenching machine cylinder sleeve bore is carried out beam-plasma scanning at last and quenches.The cylinder sleeve of producing with said method reduces by 30% than the centrifugal casting cylinder sleeve production cost of same model, through the cylinder sleeve of said method production be installed on the 4-95 diesel engine with without with oppose than test through the centrifugal casting boron cast iron cylinder sleeve of beam-plasma sclerosis, improve 1.5 times and 0.5 times service life respectively.
Claims (2)
1. the production method of a cast iron cylinder jacket of diesel engine, it comprises cast blank, machining moulding, bore area with beam-plasma scanning quench hardening operation, its feature also is: adopt following method during cast blank:
1.1. at first using the styrofoam foaming in the cylinder jacket mould is the disappearance mould identical with the cylinder jacket shape, and is stained with running channel and cast gate at suitable position;
1.2. evenly apply one deck alloy casting penetration enhancer at disappearance mould bore area, apply one deck fireproof coating again at integral surface;
1.3. the disappearance mould is imbedded in the interior dried quartz sand of casting sandbox, vacuumize after the sealing, the pouring molten iron while vacuumizing, the disappearance mould is met the molten iron gasification and is disappeared, and molten iron occupies the space of disappearance mould, forms blank after the condensation.
2. the alloy casting penetration enhancer that uses in the method according to claim 1, it is characterized in that evenly mixing the back by the ferrochrome powder of weight ratio 80～100%, 1～10% rare earth powder, 1～10% copper powder is in harmonious proportion by glue and forms, the optimization proportioning is: ferrochrome powder 90%, rare earth powder 5%, copper powder not 5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001112066A CN1160173C (en) | 2000-07-12 | 2000-07-12 | Method for producing cast iron cylinder jacket of diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001112066A CN1160173C (en) | 2000-07-12 | 2000-07-12 | Method for producing cast iron cylinder jacket of diesel engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1333104A true CN1333104A (en) | 2002-01-30 |
| CN1160173C CN1160173C (en) | 2004-08-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001112066A Expired - Fee Related CN1160173C (en) | 2000-07-12 | 2000-07-12 | Method for producing cast iron cylinder jacket of diesel engine |
Country Status (1)
| Country | Link |
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| CN (1) | CN1160173C (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1295049C (en) * | 2005-07-01 | 2007-01-17 | 沪东重机股份有限公司 | Marine large-diameter cylinder liner casting method |
| CN100348854C (en) * | 2004-12-11 | 2007-11-14 | 董宽志 | Manufacturing method of laminated gradient composite ceramic cylinder jacket |
| CN100439033C (en) * | 2007-01-09 | 2008-12-03 | 沪东重机有限公司 | Method of casting thin wall water chamber for high power diesel engine |
| CN100446893C (en) * | 2003-12-15 | 2008-12-31 | 李自明 | Lost foam foundry method for engine cylinder |
| CN101698219B (en) * | 2009-10-23 | 2011-04-27 | 湖北省缸套厂 | Method for casting negative pressure solid cylinder sleeve |
| CN102059527A (en) * | 2010-12-15 | 2011-05-18 | 罗勇 | Method for manufacturing hollow shaft of vehicle rear axle reducer |
| CN102328025A (en) * | 2011-08-25 | 2012-01-25 | 陕西理工学院 | Lost foam casting method of balance shaft housing |
| CN102476165A (en) * | 2010-11-23 | 2012-05-30 | 广西玉柴机器股份有限公司 | Method for manufacturing manually moulded special-shaped exhaust holes in sand mould casting |
| CN105772635A (en) * | 2016-03-14 | 2016-07-20 | 扬州华铁铁路配件有限公司 | Cylinder sleeve producing method |
| CN105838984A (en) * | 2016-05-23 | 2016-08-10 | 安徽鑫宏机械有限公司 | Titanium boride whisk reinforcement cast-infiltration composite wear-resistant hammerhead of mining-purpose crusher and production method thereof |
-
2000
- 2000-07-12 CN CNB001112066A patent/CN1160173C/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100446893C (en) * | 2003-12-15 | 2008-12-31 | 李自明 | Lost foam foundry method for engine cylinder |
| CN100348854C (en) * | 2004-12-11 | 2007-11-14 | 董宽志 | Manufacturing method of laminated gradient composite ceramic cylinder jacket |
| CN1295049C (en) * | 2005-07-01 | 2007-01-17 | 沪东重机股份有限公司 | Marine large-diameter cylinder liner casting method |
| CN100439033C (en) * | 2007-01-09 | 2008-12-03 | 沪东重机有限公司 | Method of casting thin wall water chamber for high power diesel engine |
| CN101698219B (en) * | 2009-10-23 | 2011-04-27 | 湖北省缸套厂 | Method for casting negative pressure solid cylinder sleeve |
| CN102476165A (en) * | 2010-11-23 | 2012-05-30 | 广西玉柴机器股份有限公司 | Method for manufacturing manually moulded special-shaped exhaust holes in sand mould casting |
| CN102059527A (en) * | 2010-12-15 | 2011-05-18 | 罗勇 | Method for manufacturing hollow shaft of vehicle rear axle reducer |
| CN102328025A (en) * | 2011-08-25 | 2012-01-25 | 陕西理工学院 | Lost foam casting method of balance shaft housing |
| CN105772635A (en) * | 2016-03-14 | 2016-07-20 | 扬州华铁铁路配件有限公司 | Cylinder sleeve producing method |
| CN105772635B (en) * | 2016-03-14 | 2018-05-15 | 扬州华铁铁路配件有限公司 | A kind of production method of cylinder jacket |
| CN108273964A (en) * | 2016-03-14 | 2018-07-13 | 扬州华铁铁路配件有限公司 | A kind of production method for the cylinder jacket improving surface quality |
| CN108273964B (en) * | 2016-03-14 | 2019-07-26 | 扬州华铁铁路配件有限公司 | A kind of production method for the cylinder jacket improving surface quality |
| CN105838984A (en) * | 2016-05-23 | 2016-08-10 | 安徽鑫宏机械有限公司 | Titanium boride whisk reinforcement cast-infiltration composite wear-resistant hammerhead of mining-purpose crusher and production method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1160173C (en) | 2004-08-04 |
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