CN106623793A - Running and feeding system on DISA line for producing annular thin-wall gray iron castings and design method of running and feeding system - Google Patents
Running and feeding system on DISA line for producing annular thin-wall gray iron castings and design method of running and feeding system Download PDFInfo
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- CN106623793A CN106623793A CN201611125819.6A CN201611125819A CN106623793A CN 106623793 A CN106623793 A CN 106623793A CN 201611125819 A CN201611125819 A CN 201611125819A CN 106623793 A CN106623793 A CN 106623793A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/082—Sprues, pouring cups
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/088—Feeder heads
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- 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
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Abstract
The invention relates to a running and feeding system on a DISA line for producing annular thin-wall gray iron castings and a design method of the running and feeding system. The running and feeding system comprises feeder heads and a pouring system, wherein the pouring system adopts a bottom pouring mode and comprises inner runners, a straight runner and transverse runners; two castings are distributed in each template; the two castings are symmetrically distributed by using the straight runner as an axis; the inner runners are arranged under each casting; the running and feeding is characterized in that the number of the runner under each casting is one, and the connecting position of the straight runner and the transverse runners is provided with a first buffer zone; the two inner runners are respectively communicated with the two transverse runners; a second buffer zone is arranged at one end, which is far away from the first buffer zone, of each transverse runner; the feeder heads are respectively arranged right above each casting.
Description
Technical field
The present invention relates to Casting Technology field, more particularly to a kind of annular thin wall gray iron casting running and feeding system and its
Method for designing.The running and feeding system is applied on the DISA lines of production annular thin wall gray iron casting, can greatly improve annular thin
Product yield of the wall gray iron casting on DISA lines, and the casting defect frequently occurred under its current working condition can be eliminated
Problem.
Background technology
Often a variety of casting flaws in ironcasting, particularly some thin-wall parts there are, and thin-walled position pasty state is simultaneously
Solidification tendency is big, and the Feeding channel of cast top rising head is easily blocked by these regions, therefore shrinkage porosite, shrinkage cavity are this kind of foundry goods
The casting flaw for often occurring.Shrinkage defect is a kind of important casting flaw.Area due to reducing loading end, it
Presence can seriously undermine the intensity and hardness of foundry goods.How to prevent these defects from producing and be always asking for castings production factory concern
Topic.On the basis of defect is reduced as far as possible, how to improve product yield, the rate of reducing the number of rejects and seconds is also that solution is badly in need of in castings production factory
Problem certainly.
Rising head and running gate system that existing such annular gray iron casting is adopted are the DISA lines according to DISA companies of Denmark
What the method in design instruction was designed.DISA production lines adopt compressed air extrusion moduling, and sand mold compactability is good, production
Efficiency high, is suitable to produce the medium complexity of structure, the high magnesium iron of precise requirements and gray iron casting.Therefore DISA lines are castings now
The common equipment of the small-sized foundry goods of enterprise's production high-volume.But DISA lines equipment limit casting technique can only vertical-parting, and only
There is a die joint, gate location is fixed on an a small range.The characteristics of DISA line equipment, determines the spy of its casting technique
Different property.
The foundry enterprise of currently employed DISA lines is usually that the method for designing be given according to DISA companies carries out running gate system
Design, using similar cast iron Feeder Design empirical method design rising head, lacks strict science, as shown in Figure 3, it is shown that existing
There is the foundary methods drawing that such foundry goods is produced in technology, it can be seen that produce the cast that such foundry goods is adopted on current DISA lines
System and rising head have the disadvantage that：First, rising head is placed on the oblique upper of foundry goods, and feeding pressure in foundry goods top can be caused to reduce, and holds
It is easily caused feeding not enough；2nd, running gate system adopts bottom filling, and is provided with two ingates, casts under this kind of technique
Foundry goods is easily cracked in the middle part of two ingates, so as to cause percent defective to raise；3rd, in the design of sprue,
Designer in order that from cup enter molten metal have a buffering, on sprue and sprue and cross gate junction it is equal
Very big buffer area is devised, the two buffer areas continuously can radiate in process of setting to around, make foundry goods
Some regions produce thermal center, it is final to produce the defects such as Shrinkage cavity.Because such annular gray iron casting wall thickness is relatively thin, annular is thin
Some little projections are also dispersed with wall, these little projections can become the thermal center of foundry goods in solidification engineering, and thin-walled position
Preferential solidification can cut off the Feeding channel of thermal center, and these kick positions will form shrinkage porosite after the completion of solidification；4th, big rising head and
Thick running channel causes product yield reduction, and cannot solve to produce the root problem of shrinkage porosite.
The content of the invention
The defect of the annular thin wall gray iron casting for producing under existence conditionses on DISA lines, the technology that the present invention is intended to solve
Problem is to provide a kind of new the annular thin wall gray iron casting running and feeding system and its method for designing that are applied to DISA lines.This is poured
Runner system can be prevented effectively from drawbacks described above, and can significantly improve its product yield.
The present invention solves the technical scheme of the technical problem employing：
A kind of running and feeding system on DISA lines for producing annular thin wall gray iron casting, including rising head and running gate system, institute
State running gate system and take bottom filling, including ingate, sprue and cross gate, two foundry goods, two castings are arranged in each template
Part is respectively provided with ingate, it is characterised in that each foundry goods is just with sprue as axial symmetry arrangement immediately below each foundry goods
The quantity of lower section ingate is one, and in the junction of sprue and cross gate first buffering area domain is arranged；Two ingates point
Not with Liang Ge cross gates UNICOM, second buffering area domain is set away from the one end in first buffering area domain in each cross gate；At each
Rising head is provided with directly over foundry goods.
Running and feeding system on the DISA lines of above-mentioned production annular thin wall gray iron casting, the rising head is cylindrically shaped
Without riser base rising head.
Running and feeding system on the DISA lines of above-mentioned production annular thin wall gray iron casting, the sectional area of cross gate is interior pouring
1.2 times of road sectional area, the sectional area of sprue increases 30% on the basis of two cross gate sectional area sums.
Running and feeding system on the DISA lines of above-mentioned production annular thin wall gray iron casting, the cross sectional shape of the ingate
For rectangle, cross gate and sprue cross sectional shape be it is trapezoidal.
The method for designing of the running and feeding system on a kind of above-mentioned DISA lines, in Feeder Design, by the graphite of casting pig
Change expansion to take into account, rising head size and shape are calculated using Proportional Solidification Theory；In Design of Runner System, will adopt first
The single rising head quality calculated with Proportional Solidification Theory is summed up with the quality of corresponding foundry goods, then according to flows such as constant pressures
Process design method calculates respectively the sectional area of ingate, cross gate and sprue, then debugs out through simulation softward and respectively pour
The optimal cross section shape and size in road.
The step of method for designing of the running and feeding system on the DISA lines of above-mentioned production annular thin wall gray iron casting, the method
It is：
The selection of the first step, casting technique equipment
For annular thin wall gray iron casting own characteristic and DISA line working conditions, sand casting, vertical-parting is selected to emit
Mouth and running gate system are arranged on die joint；
Second step, Feeder Design
1) setting of foundry goods basic parameter and the calculating of fundamental quantity
Known castings material is HT250, and foundry goods volume is VC, casting surface area is SC, casting density is ρ, and foundry goods is highly
h；
Quality m of foundry goods is calculated according to quality calculation formulaC=ρ VC；
The geometry modulus of foundry goods is calculated according to the definition of geometry modulus：
2) quality Perimeter quotient, gray iron casting contraction time fraction are calculated, modulus factor is shunk
Quality Perimeter quotient：
Gray iron casting contraction time fraction：
Shrink modulus factor：
3) the contraction modulus of foundry goods is calculated：MS=f2·MC；
4) rising head position is determined
Rising head position is arranged on into the surface of each foundry goods, according to Proportional Solidification Theory, using formula：
Be calculated rising head positional distance foundry goods edge apart from δ, and then determine rising head position；
5) calculate feeder modulus and determine rising head shape and size
Calculate feeder modulus：Mr=MC·f1·f2·f3；
Wherein f1It is rising head equilibrium factor, f1Value be 1.3；f3For riser pressure factor, f3With the quality circumference of foundry goods
Business is relevant, and concrete numerical value is according to step 2) the quality Perimeter quotient Q that obtainsmTable look-up acquisition；
According to above-mentioned feeder modulus, cylinder is taken without riser base rising head, the H/D=1.2 of empirically determined rising head, and then
Being tabled look-up by feeder modulus and H/D can obtain Riser Dimensions；
6) calculate riser neck modulus and determine riser neck shape and size
Calculate riser neck modulus：Mn=MC·fP·f2·f4, cuboid riser neck is chosen,
Wherein, f4For riser distance factor, f4Value is 0.8；fPBe circulation effect factor, fPValue is 0.5；
Riser neck thickness：E=(2～2.5) Mn,
Riser neck width：W >=5e,
Riser distance：L ＜=3e,
Riser neck size is determined according to the principle of riser neck " short, thin, width "；
3rd step, Design of Runner System
1) cup design
According to the requirement of the quality sum and product yield of single foundry goods and rising head, corresponding cup is chosen, and adopted
Use automatic modeling；
2) running channel design
Ingate sectional area S is calculated using the flow such as constant pressure process design method1：
Wherein, G is the quality of molten metal for flowing through ingate sectional area；μ is discharge coefficient, and μ values are 0.35；τ is metal
Liquid flows through the time of sectional area；G is acceleration of gravity；HPFor actual ram, i.e. height between cup vertex distance ingate
Degree；
Each cross gate sectional area S2For corresponding ingate sectional area S11.2 times, cross gate sectional area S2For：S2=
1.2S1；
The sectional area S of sprue3Than two cross gate sectional area S2Plus and big by 30%, sprue sectional area S3=2*S2*
(1+30%)；
Determine that ingate cross sectional shape is rectangle through simulation softward debugging, cross gate cross sectional shape is isosceles trapezoid, directly
Running channel cross sectional shape is isosceles trapezoid, so far completes the design of running gate system.
Compared with prior art, the invention has the beneficial effects as follows：
The prominent substantive distinguishing features of the present invention are：
(1) original running gate system adopts bottom filling, there is two ingates, and the present invention is changed to two ingates in single
Running channel, can effectively improve the crackle that foundry goods is produced at transition joint under double ingate techniques, obtain quality more
Excellent foundry goods.
(2) rising head position is located at the oblique upper of foundry goods, rising head is arranged on foundry goods by the present invention in existing running and feeding system
Surface, and design rising head when, take into full account graphitization expansion, using Proportional Solidification Theory design rising head, subtract significantly
Little rising head volume, is not only wholly absent original shrinkage defect, also improves product yield.
(3) running gate system is designed using the flow such as constant pressure process design method, reduces the sectional area of running channel, poured original
The big region that cushioning effect is played on injection system is removed, in sprue and cross gate link position and cross gate away from the one of sprue
End is respectively provided with less relief area, improves product yield, eliminates the original accumulation of heat of foundry goods, eliminates shrinkage defect.
(4) method for designing of Feeder Design and running gate system cooperates, and is simulated repeatedly by simulation softward, using this
The foundry goods that bright running and feeding system is obtained is without shrinkage porosite phenomenon, and product yield is high.
The present invention marked improvement be：
(1) on the basis of original DISA lines running gate system and rising head, graphitization expansion is taken into full account, substantially reduces and emit
The size of mouth and running gate system, makes product yield improve 15%-25%；
(2) poured using the present invention and emitted because the presence of heat energy-saving position can make foundry goods produce shrinkage porosite in original running and feeding system
The method for designing design rising head of port system and running gate system, can effectively reduce the size of running gate system and rising head, make whole casting
Part uniformly and quickly completes process of setting, and shrinkage defect is wholly absent.
Description of the drawings
Fig. 1 is the template layout of the running and feeding system on the DISA lines of present invention production annular thin wall gray iron casting；
Fig. 2 is each running channel cross sectional shape of the running and feeding system on the DISA lines of present invention production annular thin wall gray iron casting
Schematic diagram, wherein Fig. 2 (a) are the cross sectional shape of ingate, and Fig. 2 (b) is the cross sectional shape of sprue, and Fig. 2 (c) is cross gate
Cross sectional shape；
Fig. 3 is the template layout of former running and feeding system and corresponding Shrinkage cavity schematic diagram；Wherein Fig. 3 (a) is poured for original
The template layout of runner system, Fig. 3 (b) is the corresponding shrinkage porosite schematic diagram that foundry goods is produced under former running and feeding system；Fig. 3 (c)
For the corresponding shrinkage cavity schematic diagram produced under former running and feeding system；
Fig. 4 is the corresponding Shrinkage cavity schematic diagram that foundry goods is produced under running and feeding system of the present invention；Wherein Fig. 4 (a) is this
The corresponding shrinkage porosite schematic diagram of foundry goods is produced under invention running and feeding system；Fig. 4 (b) is to produce foundry goods under running and feeding system of the present invention
Corresponding shrinkage cavity schematic diagram；
In figure, 1 foundry goods, 2 rising heads, 3 ingates, 4 sprues, 5 cross gates, 6 first buffering area domains, 7 second buffering area domains.
Specific embodiment
The present invention is further discussed below with reference to embodiment and accompanying drawing, but not in this, as to the application claim guarantor
The restriction of shield scope.
The present invention production annular thin wall gray iron casting DISA lines on running and feeding system (abbreviation running and feeding system, referring to
Fig. 1), the running and feeding system includes rising head and running gate system, and the running gate system takes bottom filling, including single ingate 3, straight
Running channel 4 and cross gate 5, in the junction of sprue 4 and cross gate 5 first buffering area domain 6 is arranged；Two are arranged in each template
Foundry goods 1, two foundry goods 1 are respectively provided with ingate 3 with sprue 4 as axial symmetry arrangement immediately below each foundry goods, pour in two
Road 3 respectively with two UNICOMs of cross gate 5, second buffering area domain is set away from the one end in first buffering area domain 6 in each cross gate 5
7；Rising head 2 is provided with directly over each foundry goods.
The rising head 2 takes into account the graphitization expansion of casting pig when designing, and using Proportional Solidification Theory rising head is calculated
Size, and it is cylindrically shaped without riser base rising head to choose rising head；The area of section of the ingate 3 is using flow works such as constant pressures
Skill method for designing is calculated, and cross sectional shape is rectangle；The sectional area of cross gate 5 is 1.2 times of ingate sectional area, section shape
Shape is trapezoidal, and the sectional area of sprue 6 increases 30% on the basis of two cross gate sectional area sums, and cross sectional shape is ladder
Shape.
Heretofore described section each means the cross section of corresponding running channel.
The method for designing of running and feeding system of the present invention is：
The selection of the first step, casting technique equipment
For annular thin wall gray iron casting (abbreviation foundry goods) own characteristic and DISA line working conditions, sand casting is selected,
Vertical-parting, rising head and running gate system are arranged on die joint；
Second step, Feeder Design
1) setting of foundry goods basic parameter and the calculating of fundamental quantity
Known castings material is HT250, and foundry goods volume is VC, casting surface area is SC, casting density is ρ, and foundry goods is highly
h；
Quality m of foundry goods is calculated according to quality calculation formulaC=ρ VC；
The geometry modulus of foundry goods is calculated according to the definition of geometry modulus：
2) quality Perimeter quotient, gray iron casting contraction time fraction are calculated, modulus factor is shunk
Quality Perimeter quotient：
Gray iron casting contraction time fraction：
Shrink modulus factor：
3) the contraction modulus of foundry goods is calculated：MS=f2·MC；
4) rising head position is determined
Rising head position is arranged on into the surface of each foundry goods, according to Proportional Solidification Theory, the position of rising head should deviate heat
Section position, but can not be away from too far away；Using formula：By foundry goods height h substitute into, be calculated rising head position away from
From foundry goods edge distance δ, and then determine rising head position；
5) calculate feeder modulus and determine rising head shape and size
Calculate feeder modulus：Mr=MC·f1·f2·f3；
Wherein f1It is rising head equilibrium factor, f1Value be 1.3；f3For riser pressure factor, f3With the quality circumference of foundry goods
Business is relevant, and concrete numerical value is according to step 2) the quality Perimeter quotient Q that obtainsmTable look-up acquisition；
According to above-mentioned feeder modulus, cylinder is taken without riser base rising head, because rising head be that feeding is acted on, rule of thumb
Determine the H/D=1.2 of rising head, and then tabled look-up by feeder modulus and H/D and can obtain Riser Dimensions；
6) calculate riser neck modulus and determine riser neck shape and size
Calculate riser neck modulus：Mn=MC·fP·f2·f4, cuboid riser neck is chosen,
Wherein, f4For riser distance factor, f4Value is 0.8；fPBe circulation effect factor, fPValue is 0.5；
Riser neck thickness：E=(2～2.5) Mn,
Riser neck width：W >=5e,
Riser distance：L ＜=3e,
Riser neck size is determined according to the principle of riser neck " short, thin, width "；
3rd step, Design of Runner System
1) cup design
According to the requirement of the quality sum and product yield of single foundry goods and rising head, corresponding cup is chosen, and adopted
Use automatic modeling；
2) running channel design
Ingate sectional area S is calculated using the flow such as constant pressure process design method1：
Wherein, G is the quality of molten metal for flowing through ingate sectional area, and a rising head and a foundry goods institute are in the present invention
Account for the quality sum of molten metal；μ is discharge coefficient, and μ values are 0.35；τ flows through the time of sectional area for molten metal, according to foundry goods
The factors such as setting time determine；G is acceleration of gravity；HPFor actual ram, i.e. height between cup vertex distance ingate
Degree.
Each cross gate sectional area S2For corresponding ingate sectional area S11.2 times, cross gate sectional area S2：S2=1.2S1；
The sectional area S of sprue3Than two cross gate sectional area S2Plus and big by 30%, sprue sectional area S3=2*S2*
(1+30%)；
It is rectangle through the final determination ingate section optimum shape of debugging, cross gate cross sectional shape is isosceles trapezoid, directly
Running channel cross sectional shape is isosceles trapezoid, and each sectional dimension is calculated according to above-mentioned formula, so far completes the design of running gate system.
Embodiment 1
Running and feeding system on the DISA lines of the present embodiment production annular thin wall gray iron casting includes rising head and running gate system,
The running gate system takes bottom filling, including single ingate 3, sprue 4 and cross gate 5, in sprue 4 and cross gate 5
Junction arranges first buffering area domain 6；Two foundry goods 1 are arranged in each template, two foundry goods 1 are with sprue 4 as axial symmetry cloth
Put, be respectively provided with ingate 3 immediately below each foundry goods, two ingates 3 respectively with two UNICOMs of cross gate 5, it is horizontal at each
Running channel 5 arranges second buffering area domain 7 away from the one end in first buffering area domain 6；Rising head is provided with directly over each foundry goods
2, the rising head 2 takes into account the graphitization expansion of casting pig when designing, and using Proportional Solidification Theory rising head size is calculated, and
Choose rising head cylindrically shaped without riser base rising head；The area of section of the ingate 3 is using flow technological designs such as constant pressures
Method is calculated, and cross sectional shape is rectangle；The sectional area of cross gate 5 is 1.2 times of ingate sectional area, and cross sectional shape is ladder
Shape, the sectional area of sprue 6 increases 30% on the basis of two cross gate sectional area sums, and cross sectional shape is trapezoidal.
The basic parameter of the present embodiment foundry goods is：Castings material is HT250, foundry goods volume VC=344185.8763mm3, casting
Part surface area SC=69874.7043mm2, casting density ρ=6.45*10-6kg/mm3,
The specific design step of the running and feeding system is as follows：
The selection of the first step, casting technique equipment
What is chosen in the present embodiment is certain small-sized machine rotating disk, belongs to annular thin wall gray iron casting, and production line is
DISA lines, sand casting, vertical-parting, rising head and running gate system are arranged on die joint；
Second step, Feeder Design
1) setting of foundry goods basic parameter and the calculating of fundamental quantity
Castings material is：HT250, foundry goods volume：VC=344185.8763mm3, casting surface area：SC=
69874.7043mm2, casting density：ρ=6.45*10-6kg/mm3, foundry goods height h=263mm；
The quality of foundry goods is calculated according to quality calculation formula：mC=ρ VC=6.45*10-6* 344185.8763=
2.22kg；
The geometry modulus of foundry goods is calculated according to the definition of geometry modulus：
2) quality Perimeter quotient, gray iron casting contraction time fraction are calculated, modulus factor, gray iron casting feeding rate quality is shunk
Perimeter quotient：
Gray iron casting contraction time fraction：
Shrink modulus factor:
3) the contraction modulus of foundry goods is calculated
MS=f2·MC=0.8*0.493=0.394cm
4) rising head position is determined
Rising head position is arranged on into the surface of each foundry goods, according to the theory of Equilibrium Solidification principle, the position of rising head should
Deviate heat energy-saving position, but can not be away from too far away, using formula：Foundry goods height h=263mm is substituted into can obtain δ
=4mm, i.e. rising head positional distance foundry goods edge are 4mm.
5) calculate feeder modulus and determine rising head shape and size
Feeder modulus：Mr=MC·f1·f2·f3=0.493*1.3*0.8*1.4=0.718cm
Wherein f1It is rising head equilibrium factor, takes f1=1.3；f3For riser pressure factor, according to Qm=18.53kg/mm3Table look-up
Can obtain：f3=1.4.
Cylinder is chosen without riser base rising head, empirically determined H/D=1.2, and due to Mr=0.718cm, tabling look-up can
It is Φ 45mm × 54mm to obtain Riser Dimensions.
6) calculate riser neck modulus and determine riser neck shape and size
Riser neck modulus：Mn=MC·fP·f2·f4=0.493*0.5*0.8*0.8=0.158cm
Wherein, f4=0.8, fP=0.5
Riser neck thickness：E=(2～2.5) Mn3.2～4.0mm of ≈, take e for 4mm；
Riser neck width：W >=5e=20mm；
Riser distance：L ＜=3e=12mm；
According to the principle and rising head position δ of riser neck " short, thin, width ", riser neck size is taken for 4mm × 20mm × 5mm.
3rd step, Design of Runner System
1) cup design
Every foundry goods and rising head quality sum are G, G=2.375kg, and per type two pieces, it is 65% to fix tentatively product yield, is adopted
With automatic modeling, No. 1 cup is selected.
2) running channel design
Using the flow process design method such as constant pressure, ingate sectional area S is calculated1：
Wherein, G is foundry goods and rising head quality sum；
μ is discharge coefficient, and value is 0.35；
ρ is the density of casting material, and its value is 6.45*10-3g/mm3；
τ flows through the time of ingate sectional area for molten metal, determines that value is 1 according to factors such as casting solidification times；
G is acceleration of gravity；
HPFor actual ram, i.e. height of the cup fixed point between ingate, value is 350mm.
Cross gate sectional area S2For ingate sectional area S11.2 times, cross gate sectional area：
S2=1.2S1=1.2*402=482mm2,
The sectional area S of sprue3Than two cross gate areas plus and big by 30%, sprue sectional area：
S3=1.3*2*S2=1.3*2*482=1254mm2,
It is rectangle through the final determination ingate cross sectional shape of debugging, ingate area of section is 402mm2；Cross gate cuts
Face is shaped as trapezoidal, and area of section is 482mm2；Sprue Section is trapezoidal, and area of section is 1254mm2；Each section shape
Shape and size are as shown in Fig. 2 so far complete the design of running gate system.
The rising head obtained according to above-mentioned design and running gate system, arrangement template layout is 2, a type, as shown in Figure 1.
The running and feeding system designed using the present embodiment, using being simulated with numerical simulation software, as a result such as Fig. 3 and
Shown in Fig. 4, it can be seen that position the pouring in the present embodiment of shrinkage porosite is easily produced under the corresponding technique of original running and feeding system
It is wholly absent under runner system technique, i.e., the foundry goods that the present embodiment is obtained is produced without any shrinkage defect.By calculating, this reality
The craft rate of production of a foundry goods is applied by original 43.1% liter a height of 62%, its product yield is significantly improved.
The present invention does not address part and is applied to prior art.
Claims (6)
1. the running and feeding system on a kind of DISA lines for producing annular thin wall gray iron casting, including rising head and running gate system, it is described
Running gate system takes bottom filling, including ingate, sprue and cross gate, and two foundry goods, two foundry goods are arranged in each template
With sprue as axial symmetry arrange, be respectively provided with ingate immediately below each foundry goods, it is characterised in that each foundry goods just under
The quantity of square running channel is one, and in the junction of sprue and cross gate first buffering area domain is arranged；Two ingates respectively with
Liang Ge cross gates UNICOM, second buffering area domain is arranged in each cross gate away from the one end in first buffering area domain；In each foundry goods
Surface be provided with rising head.
2. the running and feeding system on DISA lines according to claim 1, it is characterised in that the rising head is cylindrically shaped
Without riser base rising head.
3. the running and feeding system on DISA lines according to claim 1, it is characterised in that the sectional area of cross gate is interior pouring
1.2 times of road sectional area, the sectional area of sprue increases 30% on the basis of two cross gate sectional area sums.
4. the running and feeding system on DISA lines according to claim 1, it is characterised in that the cross sectional shape of the ingate
For rectangle, cross gate and sprue cross sectional shape be it is trapezoidal.
5. the method for designing of the running and feeding system on a kind of arbitrary described DISA lines of claim 1-4, it is characterised in that emitting
During mouth design, the graphitization expansion of casting pig is taken into account, rising head size and shape are calculated using Proportional Solidification Theory；
During Design of Runner System, the single rising head quality calculated using Proportional Solidification Theory and the quality of corresponding foundry goods are carried out first
Plus and, then calculate the sectional area of ingate, cross gate and sprue respectively according to the flow such as constant pressure process design method, then
The optimal cross section shape and size of each running channel are debugged out through simulation softward.
6. the step of method for designing according to claim 5, the method is：
The selection of the first step, casting technique equipment
For annular thin wall gray iron casting own characteristic and DISA line working conditions, select sand casting, vertical-parting, rising head and
Running gate system is arranged on die joint；
Second step, Feeder Design
1) setting of foundry goods basic parameter and the calculating of fundamental quantity
Known castings material is HT250, and foundry goods volume is VC, casting surface area is SC, casting density is ρ, and foundry goods is highly h；
Quality m of foundry goods is calculated according to quality calculation formulaC=ρ VC；
The geometry modulus of foundry goods is calculated according to the definition of geometry modulus：
2) quality Perimeter quotient, gray iron casting contraction time fraction are calculated, modulus factor is shunk
Quality Perimeter quotient：
Gray iron casting contraction time fraction：
Shrink modulus factor：
3) the contraction modulus of foundry goods is calculated：MS=f2·MC；
4) rising head position is determined
Rising head position is arranged on into the surface of each foundry goods, according to Proportional Solidification Theory, using formula：Calculate
Obtain rising head positional distance foundry goods edge apart from δ, and then determine rising head position；
5) calculate feeder modulus and determine rising head shape and size
Calculate feeder modulus：Mr=MC·f1·f2·f3；
Wherein f1It is rising head equilibrium factor, f1Value be 1.3；f3For riser pressure factor, f3Have with the quality Perimeter quotient of foundry goods
Close, concrete numerical value is according to step 2) the quality Perimeter quotient Q that obtainsmTable look-up acquisition；
According to above-mentioned feeder modulus, cylinder is taken without riser base rising head, the H/D=1.2 of empirically determined rising head, and then pass through
Feeder modulus and H/D table look-up can obtain Riser Dimensions；
6) calculate riser neck modulus and determine riser neck shape and size
Calculate riser neck modulus：Mn=MC·fP·f2·f4, cuboid riser neck is chosen,
Wherein, f4For riser distance factor, f4Value is 0.8；fPBe circulation effect factor, fPValue is 0.5；
Riser neck thickness：E=(2～2.5) Mn,
Riser neck width：W >=5e,
Riser distance：L ＜=3e,
Riser neck size is determined according to the principle of riser neck " short, thin, width "；
3rd step, Design of Runner System
1) cup design
According to the requirement of the quality sum and product yield of single foundry goods and rising head, corresponding cup is chosen, and using certainly
Dynamic moulding；
2) running channel design
Ingate sectional area S is calculated using the flow such as constant pressure process design method1：
Wherein, G is the quality of molten metal for flowing through ingate sectional area；μ is discharge coefficient, and μ values are 0.35；τ is molten metal stream
The time of Jing sectional areas；G is acceleration of gravity；HPFor actual ram, i.e. height between cup vertex distance ingate；
Each cross gate sectional area S2For corresponding ingate sectional area S11.2 times, cross gate sectional area S2For：S2=1.2S1；
The sectional area S of sprue3Than two cross gate sectional area S2Plus and big by 30%, sprue sectional area S3=2*S2*(1+
30%)；
Determine that ingate cross sectional shape is rectangle through debugging, cross gate cross sectional shape is isosceles trapezoid, Sprue Section
For isosceles trapezoid, the design of running gate system is so far completed.
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| CN110899630A (en) * | 2019-11-28 | 2020-03-24 | 阿路米（无锡）有限公司 | Aluminum alloy casting mold capable of improving casting defects |
| CN110991093A (en) * | 2020-01-07 | 2020-04-10 | 大连远景铸造有限公司 | Casting simulation method for replacing heat-insulating riser with riser model |
| CN112548079A (en) * | 2020-08-18 | 2021-03-26 | 东风汽车有限公司 | Aluminum alloy support local extrusion method and device based on gravity casting |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110899630A (en) * | 2019-11-28 | 2020-03-24 | 阿路米（无锡）有限公司 | Aluminum alloy casting mold capable of improving casting defects |
| CN110899630B (en) * | 2019-11-28 | 2021-01-01 | 阿路米（无锡）有限公司 | Aluminum alloy casting mold capable of improving casting defects |
| CN110991093A (en) * | 2020-01-07 | 2020-04-10 | 大连远景铸造有限公司 | Casting simulation method for replacing heat-insulating riser with riser model |
| CN112548079A (en) * | 2020-08-18 | 2021-03-26 | 东风汽车有限公司 | Aluminum alloy support local extrusion method and device based on gravity casting |
| CN113182496A (en) * | 2021-04-29 | 2021-07-30 | 广西玉柴机器股份有限公司 | Casting process design method of high-grade vermicular graphite cast iron cylinder cover |
| CN115415482A (en) * | 2022-08-08 | 2022-12-02 | 沈阳铸研科技有限公司 | Aluminum alloy bottom pouring type pouring system |
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