CN106583649A - Casting process for casting motorcycle engine cylinder block - Google Patents
Casting process for casting motorcycle engine cylinder block Download PDFInfo
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- CN106583649A CN106583649A CN201611190166.XA CN201611190166A CN106583649A CN 106583649 A CN106583649 A CN 106583649A CN 201611190166 A CN201611190166 A CN 201611190166A CN 106583649 A CN106583649 A CN 106583649A
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- casting
- engine cylinder
- aluminium alloy
- motorcycle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
- B22C9/046—Use of patterns which are eliminated by the liquid metal in the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention discloses a casting process for casting a motorcycle engine cylinder block. The evaporative pattern casting process is adopted for casting the motorcycle engine cylinder block, so that the traditional sand shakeout and decoring procedures are omitted thoroughly, treatment cost is lowered, mold cost is lowered, high-precision castings are produced repeatedly one hundred percent, and the wall thickness error is controlled within +/- 0.5 mm. The casting process includes the following specific steps that a foam plastic gasifiable pattern is manufactured; the motorcycle engine cylinder block pattern is subjected to foam plastic gasification, and then the foam plastic gasifiable pattern is combined and dried; fireproof paint is brushed or sprayed on the surface of the foam plastic gasifiable pattern, and then the foam plastic gasifiable pattern is dried again; a special sand box for containing the motorcycle engine cylinder block is placed on a three-dimensional vibration compacting table and filled with bottom sand, and then vibration compacting and strike-off are carried out; the dried foam plastic gasifiable pattern is placed on the bottom sand, layer-by-layer sand filling is carried out according to process requirements, and strike-off is carried out on the opening of the box after automatic vibration compacting; and the opening of the sand box is covered with a plastic thin film, a sprue cup is placed, and an evaporative pattern is obtained and connected with a negative pressure system.
Description
Technical field
The present invention relates to the field such as Casting Technology, specifically, is that one kind is used to cast engine cylinder of motorcycle
Casting technique.
Background technology
Casting-smelting metal, manufactures casting mold, and motlten metal is poured into casting mold, obtain after solidification with definite shape,
The forming method of size and function metals part blank.
Casting is into meeting necessarily required liquid and pour enter in casting mold, Jing cooled and solidified, to level process by Metal Melting
The technical process of the foundry goods of reservation shape, size and performance is obtained afterwards.Cast blank is because of almost shaping, and reaches and exempt from mechanical adding
The purpose of work or a small amount of processing reduces cost and reduces Production Time to a certain extent. and casting is modem devices manufacture work
One of fundamental technology of industry.
Casting is that the mankind grasp a kind of ratio metal heat processing technique earlier, the history of about 6000.China about exists
The heyday of bronze casting is had been enter between B.C. 1700～first 1000, at a relatively high level in technique, has been reached.Casting
Refer to and solid metallic is molten into into the casting mold that liquid pours given shape into, treat the processing mode of its solidification forming.Had by ingot metal：
Copper, ferrum, aluminum, stannum, lead etc., the material of common casting mold is roughing sand, clay, waterglass, resin and other auxiliary materials.Special Processes of Metal Castings
Casting mold include：Model casting, lost foam casting, permanent mold casting, ceramic mold casting etc..(roughing sand includes：Quartz sand, magnesia,
Zircon sand, chromite sand, forsterite sand, aquamarine stone sand, graphite sand, iron ore etc.).
Department's penta side's ancient cooking vessel of mother of 875 kilograms of the weight of the Chinese Shang Dynasty, the Zeng Houyi honor disks of the Warring States Period, the transmissive mirror of the Western Han Dynastry, all
It is the representative productss of ancient times casting.The foundry goods of early stage is the instrument or apparatus of the aspects such as agricultural production, religion, life mostly, skill
Art color is dense.Casting technique at that time is and pottery Parallel Development to be affected very big by pottery.
China has cast out the ironcasting-Shanxi state casting mold ancient cooking vessel for seeing literature record in the world earliest at B.C. 513 years, weight
About 270 kilograms.Europe also began to produce ironcasting around century in Christian era eight.The appearance of ironcasting, expands the application of foundry goods
Scope.For example in 15～the 17th century, moral, Fa Deng states have successively laid many cast-iron pipes to resident's supplying drinking water.18th century
The industrial revolution after, steam engine, weaving loom and railway etc. industry rise, foundry goods enter for big industrial service the new period, casting
The technology of making has begun with big development.
Into 20th century, quickly, one of its key factor is the progress of product technology to the development speed of casting, it is desirable to foundry goods
Various mechanical and physical performances are more preferable, while still having good machining property；Another reason be mechanical industry itself and
The development of other industry such as chemical industry, instrument etc., creates favourable material conditions to foundry industry.Such as the development of detection meanss, protect
The raising of casting quality has been demonstrate,proved and has stablized, and condition has been provided to the theoretical development of casting；The invention of ultramicroscope etc., helps
People are deep into the microcosmoss of metal, detect the secret of metallic crystal, study the theory of metal freezing, instruct Foundry Production.
Casting classification：
Mainly there is 2 big class of sand casting and Special Processes of Metal Castings.
1st, ordinary sand casting, by the use of sand as molding material, casts also known as sand, founding, including greensand mold, dry sand mold and change
3 class of hardening sand mold is learned, but and not all sand may be used to casting.Benefit is that cost is relatively low, because the Sha Kechong used by mold
It is multiple to use；Have the disadvantage that mold makes time-consuming, mold itself can not be reused, finished product must could be obtained after destruction.
1.1 sand molds (core) casting method：Wet type sand mold, resin self-setting sand type, waterglass sand mold, dry type and skin drying mould, reality
Mold casting, vacuum moulding.
1.2 core manufacture methods：It is that selection is carried out according to core size, shape, production lot and concrete working condition.
Aborning, manual core making and machine coremaking can be divided on the whole.
2nd, Special Processes of Metal Castings, can be divided into by Modeling Material again with Special Processes of Metal Castings that natural mineral products sandstone is main Modeling Material
(such as model casting, loam moulding, shell moulded casting, negative pressure casting, cavityless casting, ceramic mold casting etc.) and with metal as main casting
Special Processes of Metal Castings (such as permanent mold casting, compression casting, continuously casting, low pressure casting, centrifugal casting etc.) two classes of section bar material.
2.1 die cast methods
Mold is made using the fusing point metal high compared with raw material.Gravitation casting method, low pressure casting method and high pressure are subdivided into wherein
Casting.
The fusing point of mold is limited by, the metal that can be cast also has been limited.
2.2 lost wax casting methods
This method can be adventitia casting and solid casting.
The object of casting required for first being replicated with wax, in being then immersed in the pond containing ceramic (or Ludox) and waits to do, make with
Waxed copy covers last layer outer ceramic, and repeat step be enough to support (about 1/4 cun to 1/ of casting process until adventitia always
8 cun), the wax in mould is then melted, and detaches mold.Thereafter mold needs repeatedly in addition high temperature, strengthens hardness rear and may be used to
Casting.
The method has good accuracy, more can be used as the casting of refractory metal (such as titanium).But due to ceramic price
It is quite high, and making needs heating for multiple times and complexity, therefore cost is rather expensive.
Moulding process
1. gravity casting：Sand is cast, diecasting.Molten metal bath is poured into into die cavity by metal self gravitation.
2. compression casting：Low-pressure casting, high-pressure casting.The press-in of molten metal bath moment is cast by extra increased pressure
Moulding chamber.
Casting technique is generally included
1. casting mold (making liquid metal become the container of solid-state foundry goods) prepares, and casting mold can be divided into sand mold, gold by material therefor
Genotype, ceramic mould, chamotte mould, graphite mould etc., can be divided into disposable type, semi-permanent mould and permanent type by access times, and casting mold prepares
Quality be affect casting quality principal element；
2. the fusing and cast of metal are cast, casting metal (casting alloy) mainly has all kinds of cast irons, cast steel and is cast with
Non-ferrous metal and alloy；
3. foundry goods is processed and is checked, and foundry goods process includes removing core and cast(ing) surface foreign body, excision dead head, relief grinding hair
The ridge and heat treatment, shaping, antirust treatment and roughing etc. such as thorn and fash.
Casting technique can be divided into three essential parts, that is, cast metal preparation, casting mold and prepare and foundry goods process.Casting metal
The metal material for pouring cast part in Foundry Production is referred to, it is, with a kind of metallic element as main component, and to add other
Metal or nonmetalloid and the alloy that constitutes, traditionally referred to as casting alloy, mainly has cast iron, cast steel and casts coloured conjunction
Gold.
Metal Melting is not only simple fusing, also including smelting process, makes to pour the metal into casting mold, in temperature, is changed
Study point and degree of purity in terms of all meet the expected requirements.For this purpose, will carry out in fusion process each for the purpose of controlling quality
Plant and check test, liquid metal can allow cast after every prescription is reached.Sometimes, in order to reach requirements at the higher level, gold
Category liquid want also outside Jing stoves after coming out of the stove process, such as desulfurization, vacuum outgass, external refining, breed or Metamorphism treatment etc..Smelting metal
Conventional equipment has furnace cupola, electric arc furnace, induction furnace, resistance furnace, reverberatory furnace etc..
Advantage：1st, the blank of complex-shaped part, especially complicated inner cavity can be produced；
2nd, wide adaptability, the conventional metal material of industry may be cast as, and several grams are arrived hundreds of ton；
3rd, raw material sources are wide, cheap, such as steel scrap, useless part, chip etc.；
4th, the geomery and part of foundry goods closely, reduces cutting output, belongs to without machining；
5th, it is widely used, in agricultural machinery, in 40%～70%, lathe, 70%～80% weight is all foundry goods.
Shortcoming：1st, mechanical performance is not so good as forging, such as organizes thick, and defect is more etc.；
2nd, in sand casting, single-piece, small lot batch manufacture, labor strength are big；
3rd, casting quality is unstable, and operation is more, and influence factor is complicated, is also easy to produce many defects.
The defect of casting has important impact to casting quality, therefore, it is to select casting alloy and casting method to accomplish fluently
Basis, should start with from the quality of foundry goods, and the formation with reference to foundry goods major defect and preventing and treating.
With the progress of science and technology and flourishing for foundry industry, different casting methods has different casting mold preparing contents.
By taking most widely used sand casting as an example, casting mold prepares to include Modeling Material preparation and moulding, makes two sport of core work.Sand mold
It is used for moulding in casting, makes the various raw materials of core, such as foundry sands, moulding sand binder and other adjuvants, and is matched somebody with somebody by them
Made by molding sand, core sand, coating etc. be referred to as Modeling Material, the task that Modeling Material prepares is requirement, the metal according to foundry goods
Property, select suitable roughing sand, binding agent and adjuvant, then according to a certain percentage they be mixed into certain performance
Molding sand and core sand.Conventional sand blender has simpson mill, reverse-flow puddle mixer and continuous muller.The latter is to aim at
The design of mixed chemical self-hardening sand, continuous to mix, mulling speed is fast.
Moulding, make core be according to casting technique require, determining formative method, entering on the basis of getting out Modeling Material
Capable.The economic effect of the precision and overall production process of foundry goods, depends primarily on this procedure.In the casting of many modernizations
In workshop, moulding, make core and all realize mechanization or automatization.Conventional sand mold moulding core-making installation has high, medium and low voltage moulding
Machine, air impulse molding machine, box-less shoot squeeze molding machine of case, cold-box core making machine and hot box core-making machine, precoated sand core making machine etc..
After foundry goods is taken out from the casting mold for pouring into a mould cooling, with having cast gate, rising head, metallic bur power, fash, sand casting
Foundry goods also adhering to sand, it is therefore necessary to through cleaning process.The equipment for carrying out this work has polishing machine, shot-blasting machine, pour and emit
Mouth cutting machine etc..Sand-cast peeling is the poor one procedure of labor condition, so when formative method is selected, should use up
Amount facilitates condition in view of creating for peeling.Some foundry goods also want Jing foundry goods post processings because of particular/special requirement, such as heat treatment,
Shaping, antirust treatment, roughing etc..
Casting technique can be divided into three essential parts, that is, cast metal preparation, casting mold and prepare and foundry goods process.Casting metal
The metal material for pouring cast part in Foundry Production is referred to, it is, with a kind of metallic element as main component, and to add other
Metal or nonmetalloid and the alloy that constitutes, traditionally referred to as casting alloy, mainly has cast iron, cast steel and casts coloured conjunction
Gold.
After foundry goods is taken out from the casting mold for pouring into a mould cooling, there are cast gate, rising head and metallic bur power fash, the foundry goods of sand casting
Sand is adhering to also, it is therefore necessary to through cleaning process.The equipment for carrying out this work has shot-blasting machine, cast gate rising head cutting machine
Deng.Sand-cast peeling is the poor one procedure of labor condition, so when formative method is selected, should consider as far as possible
Create for peeling and facilitate condition.Some foundry goods also want Jing foundry goods post processings, such as heat treatment, shaping, antirust because of particular/special requirement
Process, roughing etc..
Casting is both economical blank forming method, for complex-shaped part can more show its economy.
Art work of cylinder body and cylinder cap, propeller for vessels and exquisiteness such as automobile engine etc..Some are difficult to the part for cutting, and such as fire
The nickel-base alloy part of steam turbine cannot be shaped without casting method.
In addition, the subject range of the accessory size and weight of casting is very wide, metal species are almost unrestricted；Part is in tool
While having common mechanical performance, also with the combination property such as wear-resisting, corrosion-resistant, shock-absorbing, be other metal forming methods as forged,
Roll, weld, rushing etc. what is do not accomplished.Therefore the blank part for being produced with casting method in machine-building, in quantity and tonnage
On be still most so far.
Foundry Production Jing material often has various metals, coke, timber, plastics, gas and liquid fuel, Modeling Materials
Material etc..Equipment needed thereby has the various stoves of metal smelting, the various puddle mixers for having mulling, has moulding to make the various of core and makes
Type machine, core making machine, have shakeout, shot-blasting machine of cleaning foundry goods etc..Machine and equipment also for Special Processes of Metal Castings and permitted
The equipment that many transports and material are processed.
The characteristics of Foundry Production has different from other techniques, mainly wide adaptability, need to it is many with material and facility, pollution ring
Border.Foundry Production can produce the pollution of dust, harmful gass and Noise upon Environment, come more tight compared with other manufacturing technologies
Weight, needs take measures to be controlled.
The trend of Castings Development is that requirement foundry goods has a more preferable combination property, higher precision, less surplus and
Brighter and cleaner surface.Additionally, the requirement of energy-conservation and the social cry to natural environment rehabilitation also more and more higher.Will to adapt to these
Ask, new casting alloy will be developed, novel process for smelting and new equipment accordingly will occur.
The automatic and mechanical degree of Foundry Production more will be sent out in terms of flexible production while improving constantly
Exhibition, to expand the adaptability to different batches and multi-item production.The new technique of energy saving and raw material will be obtained preferentially
Development, few new technology new equipment for producing or not producing pollution will be first subjected to pay attention to.Quality Control Technology is in each procedure
In terms of detection and nondestructive inspection, stress determination, there will be new development.
The content of the invention
It is an object of the invention to provide a kind of casting technique for casting engine cylinder of motorcycle, using evaporative pattern
Method casting technique carries out the casting of engine cylinder of motorcycle, compares with conventional cast, completely eliminates traditional knockout and goes out
Core operation, reduces reconditioning charge, and die cost declines, and high-precision foundry goods is produced in 100% repetition, and wall thickness deflection control exists
Between ± 0.5mm.
The present invention is achieved through the following technical solutions：A kind of casting technique for casting engine cylinder of motorcycle, bag
Include step in detail below：
1) bubble modeling gasification mould is made, lost foam casting, shape is adopted according to the cylinder structure of engine of motor-cycle figure of design
Into engine cylinder of motorcycle mould；
2) engine cylinder of motorcycle mould is carried out into bubble modeling gasification, then bubble modeling gasification die assembly post-drying；
3) Jing step 2) after, dried after bubble modeling gasification die surface brush or spray fireproof coating again；
4) three-dimensional vibrating-compaction table will be placed in for the special sandbox for loading engine cylinder of motorcycle, and inserts bed load and shaken
In fact, strike off；
5) by through step 3) bubble of post-drying modeling gasification mould is put on bed load, is layered back-up sand by technological requirement, automatically
Case mouth is struck off after jolt ramming；
6) with covered rearing with plastic film sandbox mouth, cup is put, evaporative pattern is obtained, and evaporative pattern is connect into negative pressure system；
7) using medium-frequency induction furnace smelting aluminium alloy liquid, part aluminium alloy is initially charged in medium-frequency induction furnace, is led to
Electricity adds remaining aluminium alloy after load melting, and sampling is done on-the-spot sample analysis, melts out qualified aluminium alloy liquid；
8) rare-earth silicon alloy of 0.6～0.8% aluminum water bag quality is put in aluminum water bag, rare-earth silicon alloy is broken into fritter
Shape, aluminium alloy liquid is poured aluminum water bag carries out Metamorphism treatment；
9) casting；Aluminium alloy liquid after Metamorphism treatment is poured into into lost foam casting molding motor by negative pressure system
Car engine cylinder block casting；
10) casting cleaning；Unpack after the solidification of aluminium alloy liquid and take out engine cylinder of motorcycle, quality inspection, early stage process, with
It is standby to carry out heat treatment；
11) heat treating castings：Through step 10) after, engine cylinder of motorcycle foundry goods is heated in cabinet-type electric furnace
, temperature retention time is determined by batch, then the isothermal 5-10 minutes in oil sump, obtain based on lower bainite by 350-500 DEG C
Matrix.
Further is that the present invention is better achieved, especially using following set-up modes：In the step 7) in, part aluminum
The weight of alloy is the 60～80% of total aluminium alloy weight, and the weight of remaining aluminium alloy is the 20～40% of total aluminium alloy weight.
Further is that the present invention is better achieved, especially using following set-up modes：In the step 7) in, part aluminum
The weight of alloy is the 70% of total aluminium alloy weight, and the weight of remaining aluminium alloy is the 30% of total aluminium alloy weight.
Further is that the present invention is better achieved, especially using following set-up modes：The step 7) in, Medium frequency induction
The fusion temperature of electric furnace is 650～800 DEG C.
Further is that the present invention is better achieved, especially using following set-up modes：The step 7) in, aluminum alloy melt
The tapping temperature of body is 700 DEG C.
Further is that the present invention is better achieved, especially using following set-up modes：In step 10) in, the quality inspection,
Early stage process is specially：Quality examination is carried out to engine cylinder of motorcycle first, chooses underproof engine cylinder of motorcycle
Again melt down, castings are cleared up；Method is knocked off with hammering or patterning method removes dead head, foundry goods table is removed with shot-blasting machine
The scab in face, list edge；Foundry goods after polishing cleaning is delivered and carries out heat treatment.
The present invention compared with prior art, with advantages below and beneficial effect：
The present invention carries out the casting of engine cylinder of motorcycle using lost foam casting technique, compares with conventional cast,
Completely eliminate traditional knockout and go out core operation, reduce reconditioning charge, die cost declines, and height is produced in 100% repetition
The foundry goods of precision, wall thickness deflection are controlled between ± 0.5mm.
The present invention is produced to have great advantage than traditional sand mold, and it not only saves the model expense of costliness, and is easy to behaviour
Make, shorten the cycle of producing, improve and produce efficiency, the advantage such as surface quality good high with dimensional accuracy.
The present invention has cancelled core and the coremaking Ministry of worker, has eradicated because coremaking, the casting shortcoming of lower core formation and waste product；Can
Mitigate casting weight, pattern draft can be cancelled.
The present invention compares with conventional cast, and die cost declines and can obtain shape design in a jumble and 100% repeatedly produces
High-precision foundry goods, wall thickness deflection are controlled between ± 0.5mm, are completely eliminated traditional knockout and are gone out core operation, reduce
Reconditioning charge.
Specific embodiment
The present invention is described in further detail with reference to embodiment, but embodiments of the present invention not limited to this.
Embodiment 1：
A kind of casting technique for casting engine cylinder of motorcycle, carries out motorcycle using lost foam casting technique
The casting of engine cylinder-body, is compared with conventional cast, is completely eliminated traditional knockout and is gone out core operation, reduces reconditioning fee
With die cost declines, and high-precision foundry goods is produced in 100% repetition, and wall thickness deflection is controlled between ± 0.5mm, especially adopted
Use following set-up modes：Including step in detail below：
1) bubble modeling gasification mould is made, lost foam casting, shape is adopted according to the cylinder structure of engine of motor-cycle figure of design
Into engine cylinder of motorcycle mould；
2) engine cylinder of motorcycle mould is carried out into bubble modeling gasification, then bubble modeling gasification die assembly post-drying；
3) Jing step 2) after, dried after bubble modeling gasification die surface brush or spray fireproof coating again；
4) three-dimensional vibrating-compaction table will be placed in for the special sandbox for loading engine cylinder of motorcycle, and inserts bed load and shaken
In fact, strike off；
5) by through step 3) bubble of post-drying modeling gasification mould is put on bed load, is layered back-up sand by technological requirement, automatically
Case mouth is struck off after jolt ramming；
6) with covered rearing with plastic film sandbox mouth, cup is put, evaporative pattern is obtained, and evaporative pattern is connect into negative pressure system；
7) using medium-frequency induction furnace smelting aluminium alloy liquid, part aluminium alloy is initially charged in medium-frequency induction furnace, is led to
Electricity adds remaining aluminium alloy after load melting, and sampling is done on-the-spot sample analysis, melts out qualified aluminium alloy liquid；
8) rare-earth silicon alloy of 0.6～0.8% aluminum water bag quality is put in aluminum water bag, rare-earth silicon alloy is broken into fritter
Shape, aluminium alloy liquid is poured aluminum water bag carries out Metamorphism treatment；
9) casting；Aluminium alloy liquid after Metamorphism treatment is poured into into lost foam casting molding motor by negative pressure system
Car engine cylinder block casting；
10) casting cleaning；Unpack after the solidification of aluminium alloy liquid and take out engine cylinder of motorcycle, quality inspection, early stage process, with
It is standby to carry out heat treatment；
11) heat treating castings：Through step 10) after, engine cylinder of motorcycle foundry goods is heated in cabinet-type electric furnace
, temperature retention time is determined by batch, then the isothermal 5-10 minutes in oil sump, obtain based on lower bainite by 350-500 DEG C
Matrix.
Embodiment 2：
The present embodiment is further optimized on the basis of above-described embodiment, further for the present invention is better achieved,
Following set-up modes are adopted especially：In the step 7) in, the weight of part aluminium alloy is the 60～80% of total aluminium alloy weight,
The weight of remaining aluminium alloy is the 20～40% of total aluminium alloy weight.
Embodiment 3：
The present embodiment is further optimized on the basis of any of the above-described embodiment, and further is that this is better achieved
It is bright, especially using following set-up modes：In the step 7) in, the weight of part aluminium alloy is the 70% of total aluminium alloy weight,
The weight of remaining aluminium alloy is the 30% of total aluminium alloy weight.
Embodiment 4：
The present embodiment is further optimized on the basis of any of the above-described embodiment, and further is that this is better achieved
It is bright, especially using following set-up modes：The step 7) in, the fusion temperature of medium-frequency induction furnace is 650～800 DEG C.
Embodiment 5：
The present embodiment is further optimized on the basis of any of the above-described embodiment, and further is that this is better achieved
It is bright, especially using following set-up modes：The step 7) in, the tapping temperature of aluminium alloy liquid is 700 DEG C.
Embodiment 6：
The present embodiment is further optimized on the basis of any of the above-described embodiment, and further is that this is better achieved
It is bright, especially using following set-up modes：In step 10) in, the quality inspection, early stage process are specially：First to motorcycle engine
Cylinder body carries out quality examination, chooses underproof engine cylinder of motorcycle and melts down again, castings are cleared up；With hammer
Hit the method for knocking off or patterning method removes dead head, the scab of cast(ing) surface, list edge are removed with shot-blasting machine；Foundry goods after polishing cleaning send
Friendship carries out heat treatment.
The present invention is produced and is had great advantage than traditional sand mold in practical application, and it not only saves the model expense of costliness
With, and it is easy to operation, shortens the cycle of producing, improve and produce efficiency, high with dimensional accuracy, it is excellent that surface quality is good etc.
Gesture.
The present invention has cancelled core and the coremaking Ministry of worker, has eradicated because coremaking, the casting shortcoming of lower core formation and waste product；Can
Mitigate casting weight, pattern draft can be cancelled.
The present invention compares with conventional cast, and die cost declines and can obtain shape design in a jumble and 100% repeatedly produces
High-precision foundry goods, wall thickness deflection are controlled between ± 0.5mm, are completely eliminated traditional knockout and are gone out core operation, reduce
Reconditioning charge.
The above, is only presently preferred embodiments of the present invention, not does any pro forma restriction to the present invention, it is every according to
According to the present invention technical spirit above example is made any simple modification, equivalent variations, each fall within the present invention protection
Within the scope of.
Claims (6)
1. a kind of casting technique for casting engine cylinder of motorcycle, it is characterised in that：Including step in detail below：
1) bubble modeling gasification mould is made, adopts lost foam casting, formation to rub according to the cylinder structure of engine of motor-cycle figure of design
Motorcycle engine cylinder mould；
2) engine cylinder of motorcycle mould is carried out into bubble modeling gasification, then bubble modeling gasification die assembly post-drying；
3) Jing step 2) after, dried after bubble modeling gasification die surface brush or spray fireproof coating again；
4) three-dimensional vibrating-compaction table will be placed in for the special sandbox for loading engine cylinder of motorcycle, and inserts bed load jolt ramming, scrapes
It is flat；
5) by through step 3) bubble of post-drying modeling gasification mould is put on bed load, is layered back-up sand, automatic jolt ramming by technological requirement
After strike off case mouth；
6) with covered rearing with plastic film sandbox mouth, cup is put, evaporative pattern is obtained, and evaporative pattern is connect into negative pressure system；
7) using medium-frequency induction furnace smelting aluminium alloy liquid, part aluminium alloy is initially charged in medium-frequency induction furnace, energization is treated
Remaining aluminium alloy is added after load melting, sampling is done on-the-spot sample analysis, melts out qualified aluminium alloy liquid；
8) rare-earth silicon alloy of 0.6～0.8% aluminum water bag quality is put in aluminum water bag, rare-earth silicon alloy crushes frustillatum,
Aluminium alloy liquid is poured aluminum water bag carries out Metamorphism treatment；
9) casting；The aluminium alloy liquid after Metamorphism treatment is poured into lost foam casting molding motorcycle by negative pressure system to send out
Motivation cylinder block casting；
10) casting cleaning；Unpack after the solidification of aluminium alloy liquid and take out engine cylinder of motorcycle, quality inspection, early stage process, in case entering
Row heat treatment；
11) heat treating castings：Through step 10) after, engine cylinder of motorcycle foundry goods is heated to into 350- in cabinet-type electric furnace
, temperature retention time is determined by batch, then the isothermal 5-10 minutes in oil sump, obtain the matrix based on lower bainite by 500 DEG C
Tissue.
2. a kind of casting technique for casting engine cylinder of motorcycle according to claim 1, it is characterised in that：
The step 7) in, the weight of part aluminium alloy is the 60～80% of total aluminium alloy weight, and the weight of remaining aluminium alloy is total aluminum
The 20～40% of weight alloy.
3. a kind of casting technique for casting engine cylinder of motorcycle according to claim 2, it is characterised in that：
The step 7) in, the weight of part aluminium alloy is the 70% of total aluminium alloy weight, and the weight of remaining aluminium alloy is total aluminium alloy
The 30% of weight.
4. a kind of casting technique for casting engine cylinder of motorcycle according to any one of claim 1-3, which is special
Levy and be：The step 7) in, the fusion temperature of medium-frequency induction furnace is 650～800 DEG C.
5. a kind of casting technique for casting engine cylinder of motorcycle according to any one of claim 1-3, which is special
Levy and be：The step 7) in, the tapping temperature of aluminium alloy liquid is 700 DEG C.
6. a kind of casting technique for casting engine cylinder of motorcycle according to any one of claim 1-3, which is special
Levy and be：In step 10) in, the quality inspection, early stage process are specially：Quality examination is carried out to engine cylinder of motorcycle first,
Choose underproof engine cylinder of motorcycle to melt down again, castings are cleared up；Method or patterning method are knocked off with hammering
Dead head is removed, and the scab of cast(ing) surface, list edge is removed with shot-blasting machine；Foundry goods after polishing cleaning is delivered and carries out heat treatment.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115592072A (en) * | 2022-12-13 | 2023-01-13 | 衡水中裕铁信装备工程有限公司（Cn） | Composite casting method of hinge beam casting |
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| JP2002178102A (en) * | 2000-12-13 | 2002-06-25 | Isuzu Motors Ltd | Core for casting and method for manufacturing core for casting cylinder head |
| CN101554644A (en) * | 2008-04-10 | 2009-10-14 | 上海大众汽车有限公司 | Lost foam casting process suitable for aluminum alloy materials |
| CN103212668A (en) * | 2012-01-18 | 2013-07-24 | 浙江派尼尔机电有限公司 | Method for manufacturing outboard engine cylinder |
| CN103752771A (en) * | 2014-01-16 | 2014-04-30 | 安徽星亚冶金科技有限公司 | Manufacturing method for lost foam casting of high-chrome agitator blade |
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| JP2002178102A (en) * | 2000-12-13 | 2002-06-25 | Isuzu Motors Ltd | Core for casting and method for manufacturing core for casting cylinder head |
| CN101554644A (en) * | 2008-04-10 | 2009-10-14 | 上海大众汽车有限公司 | Lost foam casting process suitable for aluminum alloy materials |
| CN103212668A (en) * | 2012-01-18 | 2013-07-24 | 浙江派尼尔机电有限公司 | Method for manufacturing outboard engine cylinder |
| CN103752771A (en) * | 2014-01-16 | 2014-04-30 | 安徽星亚冶金科技有限公司 | Manufacturing method for lost foam casting of high-chrome agitator blade |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107694809A (en) * | 2017-10-13 | 2018-02-16 | 江苏捷帝机器人股份有限公司 | A kind of paint-spray robot of paint-spray robot base and its processing technology |
| CN115592072A (en) * | 2022-12-13 | 2023-01-13 | 衡水中裕铁信装备工程有限公司（Cn） | Composite casting method of hinge beam casting |
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