CN108296451A - The parting and its parting scheme of automobile engine exhaust manifold - Google Patents
The parting and its parting scheme of automobile engine exhaust manifold Download PDFInfo
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- CN108296451A CN108296451A CN201810063509.9A CN201810063509A CN108296451A CN 108296451 A CN108296451 A CN 108296451A CN 201810063509 A CN201810063509 A CN 201810063509A CN 108296451 A CN108296451 A CN 108296451A
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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
- B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
-
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/103—Multipart cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/108—Installation of cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/20—Stack moulds, i.e. arrangement of multiple moulds or flasks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y80/00—Products made by additive manufacturing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Exhaust Silencers (AREA)
Abstract
The parting and its parting scheme of automobile engine exhaust manifold, by by the sand core of exhaust manifold and sand mold as a whole, it is three parts with horizontal cut exhaust pipe in the second cutting face along the first cutting face for being located at the first total air escape pipe center and along branch pipe flange face center, enable most complicated manifold configuration one-pass molding on intermediate sand mold 2# sand molds, so as to avoid branch pipe independence coremaking, the problem of group core difficulty and low precision that group core ribbon is come, by improving a group type efficiency in upper sand mold 3# sand molds setting sprue cup fixed seat and riser positioning seat, also positioning and supporting point are provided for later stage cast, in order to which group type positioning is convenient and places the sliding between sand mold, mutual location structure is respectively equipped on three parts sand mold.Technical solution of the present invention provides a kind of new casting and divides core, classifying method, from the angle parting of core one, avoids group core and core assembling process, reduces a group core difficulty, improve production efficiency and product quality.
Description
Technical field
Casting technology field of the present invention, the more particularly to typing method of exhaust manifold.
Background technology
Automobile engine exhaust manifold as shown in Figure 1 is mainly used for focusing on the discharge gas of each cylinder always
In exhaust pipe.The operating temperature of the exhaust manifold is 750 ~ 1000 DEG C, pipe thickness 5mm-7mm；And the exhaust manifold
It is made of multichannel branch pipe, each branch pipe is finally imported at one outlet at bending structure, the outlet and total exhaust
Pipe is connected.
In existing production method, mainly use wooden model hand moulding cast, by assembly of sand core it is integral after, pouring molten iron
Exhaust manifold blank is obtained after cooling.During this group of core, generally controlled by the way of special fixture combination hand dipping
Group core precision.The sand core that such coremaking, formative technology are made is various, and group core mode is complicated, and process control requirements are cumbersome,
The grade of skill of field worker is required high.Meanwhile product size is difficult to control, and causes scale error big.Due to these because
The influence of element, can cause casting to be scrapped due to off-dimension etc., high rejection rate is also drastically influenced up to 35% often
The service life of exhaust manifold and the comprehensive performance of automobile.Meanwhile if when manufacturing experimently new product using the technique, due to needing
Mold is made, trial production is of high cost, and production proving period is long, is unfavorable for the research and development of new product.Therefore, it is necessary to by means of 3D
Printing technique designs a set of cored-up mould technique suitable for such casting, above-mentioned some to solve the problems, such as, reaches and produces
The purpose of high quality and low rejection rate casting.
Invention content
The present invention overcomes what production exhaust manifold in the prior art was brought to criticize more seam, group core hardly possible, the defect of high rejection rate,
Under the premise of based on 3D printing technique, a kind of parting and its parting scheme of automobile engine exhaust manifold are provided, and
Technical solution of the present invention is built upon completed exhaust manifold three-dimensional modeling on the basis of.
The parting scheme of automobile engine exhaust manifold of the present invention：
The exhaust manifold threedimensional model that modeling is completed is put into the quadrangle box of setting, and makes the exhaust manifold by the first step
Threedimensional model is located at the centre position in the quadrangle box space；After arrangement completes the exhaust manifold, again in the side
Arrangement of pouring system and runner system in shape box body；So that the surrounding of entire exhaust manifold threedimensional model has enough mold thickness i.e.
It can；Exhaust manifold and the running gate system and the quadrangle box of riser of accommodating is core body.
Second step carries out cutting to the core body, is three by two plane cuttings of the core body specifically
Point, the first cutting face is located at the central axes of the first total air escape pipe flange face, and the second cutting face is located at branch pipe flange face central axes
It is upper and parallel with the first cutting face；The first cutting face and the second cutting face by the core body successively cutting be 1# cores,
2# cores and 3# cores.
The 1# cores one side is plane, and face is located as bottom core；Another face is equipped with other than the first cutting face
The external form of partial exhaust manifold structure and first cuts face with the side blind riser of outer portion, namely for forming the first cutting face
The external form of the first total air escape pipe central axes above section structure in addition and the second total air escape pipe part other than the first cutting face
The external form of structure and the first cutting face are with the side blind riser of outer portion.
The 2# cores are equipped with the sand of portion discharge manifold other than the first cutting face relative to the one side in the first cutting face
Side blind riser within cored structure and the first cutting face；The 2# cores are equipped with branch pipe sand relative to the one side in the second cutting face
The buffering nest of core, manifold sand cores, one half structure of cross gate, one half structure of ingate and sprue.To realize exhaust manifold
Sand core structure be integrated on 2# cores, the appearance structure of exhaust manifold is separately positioned on 1# cores and 3# cores, not only
The printing for facilitating core has been also convenient for the group type of core.
The 3# cores relative to the second cutting face one side be equipped with the second cutting face other than branch pipe and manifold external form,
One half structure of cross gate, a half structure of ingate, the structure of sprue and feeding head, and sprue and feeding head pass through
Lead to the 3# cores.The bottom of the feeding head is located on the second cutting face.
As further limiting for the present invention, the first cutting face is additionally provided on the on-plane surface face of the 1# cores with outer portion
The structure of side blind riser, the 2# cores, which correspond on the face in the first cutting face, to be additionally provided with the first cutting face and is secretly emitted with inside points side
The structure of mouth.
It is further limited as of the invention, it is accurately and secured for convenience of coordinating between each core, in three cores
Mating surface on snap fastener can be set, on the one hand the snap fastener plays the role of positioning, on the other hand can play fixed
Effect.
As further limiting for the present invention, it can also be arranged in the both sides on three core length directions and be used for blocking
Tight structure, the clamping structure can be the U-shaped structures of open type, can also silent through mode circular configuration.The card
Tight part can be the screwed screw rod in both ends, can also be that one end sets threaded screw rod with plug, one end.Wherein, institute
State the U-shaped structure of the preferred open type of clamping structure.
As further limiting for the present invention, sprue cup fixed seat is also provided on the 3# cores.
As further limiting for the present invention, the exhaust manifold casting technique is：
1）For the exhaust manifold using one case four one case more than one piece technique, arrangement mode is that manifold inlet flange face is right two-by-two
The horizontal position of title arrangement, four that two circular distributions are formed in one case namely manifold inlet flange face is vented higher than total
Pipe；
2）Using unchoked running system, sprue is set in the docking region centre position of four casting, cross gate is located at four
On a casting docking channel, the flange face central hot section place of setting between each branch pipe arranges ingate；
3）Feeding hot riser is set in ingate and cross gate lap-joint, to improve the feeding efficiency of riser, while promoting casting
Quality and product yield.
The parting and its parting scheme of automobile engine exhaust manifold of the present invention are by making sand core and core
It is handled for an entirety, according to the sand core that separate components are integrated on one piece of sand mold to be done to whole thinking as far as possible, first
Two horizontal cutting faces are set on total air escape pipe and branch pipe flange face 19, the labyrinth of branch pipe is all integrated in intermediate sand mold 2#
On sand mold, branch pipe group core is avoided, to reduce a group core difficulty, the less fash of casting improves the accuracy of manufacture, realizes
The efficient production of exhaust manifold, such as improving productivity, product yield are promoted, rejection rate reduces.
Description of the drawings
Fig. 1 is exhaust manifold structure schematic diagram.
Fig. 2 is exhaust manifold sand core structure schematic diagram.
Fig. 3 is 1# core structure schematic diagrames.
Fig. 4 is 2# cores two sides structural schematic diagram.
Fig. 5 is 3# cores two sides structural schematic diagram.
Fig. 6 is design sketch after of the present invention group of type.
Fig. 7 is exhaust manifold casting technique.
In figure, 1- exhaust manifold threedimensional models；The sides 2- blind riser；3- feeding heads；4- sprues；5- cross gates；In 6-
Cast gate；7-1# cores；8- snap fasteners；9- clamping structures；The first die joints of 10-；11- hangs handle；12- branch pipes and total tube cavity sand
Core；13- riser export；14- sprue cup fixed seats；The first total air escape pipes of 15-；The the first cutting faces 16-；The the second cutting faces 17-；
The second total air escape pipes of 18-；19- branch pipe flange faces.
Specific implementation mode
In order to illustrate more clearly of technical scheme of the present invention, will be described in detail according to attached drawing embodiment, it is aobvious and easy
Insight, drawings in the following description are some embodiments of the invention, for those of ordinary skill in the art, is not paying
Under the premise of creative work, other drawings may also be obtained based on these drawings.
It is the three-dimensional model structure schematic diagram of a automobile engine exhaust manifold as shown in Figure 1, wherein the exhaust
Manifold includes four exhaust branch pipes and two total air escape pipes, and one end of four exhaust branch pipes is arranged side by side in branch pipe flange
On face 19, the other end is discharged after being pooled to manifold by the first total air escape pipe 15 and the second total air escape pipe 18, and first total exhaust
The central axes of pipe 15 are higher than the central axes of the second total air escape pipe 18.It is illustrated in figure 2 the sand core structure signal of the exhaust manifold
Figure, as can be seen from the figure the junction of each branch pipe sand core connects for radian, and the group core of single branch pipe sand core is extremely difficult, each
The alignment in face is difficult to control and measurement.
It is illustrated in figure 7 exhaust manifold casting technique and arranges situation, because of the exhaust manifold small volume, in order to reduce placer iron ratio
With improve production efficiency, now use one case four casting process scheme, specific process layout to be：
1）The total air escape pipe of exhaust manifold is placed in the lower section of babinet while making the branch pipe flange of exhaust manifold threedimensional model 1
Face 19 is in plumbness, and exhaust manifold threedimensional model 1 is arranged two-by-two in such a way that branch pipe flange face 19 is aligned, and forms two
The layout of a similar circular configuration；
2）Using unchoked running system, the cross gate 5 of running gate system is arranged among two opposite branch pipe flange faces 19,
And the median plane of cross gate 5 and the median plane of branch pipe flange face 19 are in the same face, and sprue 4 is arranged in two similar circles
The centre of shape topology layout, between ingate 6 is arranged on branch pipe flange face 19 branch pipe nozzle two-by-two, or it may be said that will be interior
Running channel 6 is arranged on the thermal center position of branch pipe flange face 19；It is respectively equipped with two in the layout of described two similar circular configurations
Point independent cross gate 5 and ingate 6, the entrance of two cross gates 5 is positioned opposite, and by sprue 4 by two cross
Running channel is connected as a complete running gate system；
3）In the lap-joint of ingate 6 and cross gate 5, feeding head 3, the setting side at 15 flange face of the first total air escape pipe are set
Blind riser 2 to improve the feeding efficiency of riser, while promoting the quality and product yield of casting.
Another saying is, using the casting technique as cutter, shown core body to be cut into the core of structural integrity
The exhaust manifold threedimensional model 1 is placed in quadrangle box, and makes the row by technical solution according to the invention first
Gas manifold threedimensional model 1 is located at the centre position in the quadrangle box space；The exhaust manifold threedimensional model 1 is completed in arrangement
Afterwards, arrangement of pouring system and runner system in the quadrangle box again, and make the four of entire exhaust manifold threedimensional model 1
There are enough mold thickness week；Exhaust manifold threedimensional model 1 and the running gate system and the quadrangle box of riser of accommodating is type
Core.Secondly, cutting is carried out to the core body, with two horizontal cutting facet cuttings is three parts by the core body, first
Cutting face 16 is located on the axis of 15 flange face of the first total air escape pipe, and the second cutting face 17 is located at 19 central axes of branch pipe flange face
It is upper and parallel with the first cutting face 16；The core body successively cutting is by the first cutting face, 16 and second cutting face 17
1# cores, 2# cores and 3# cores.It can also be useful for fastening the 1# cores, 2# types on the face of the core body length direction
The U-shaped card locking structure 9 of core and 3# cores, the U-shaped card locking structure 9 are divided into pair by the first cutting face 16 and the second cutting face 17
Three sections answered are located on 1# cores, 2# cores and 3# cores, after by the 1# cores, 2# cores and 3# core group types
It can be one by three parts core clamping fastener by placing the screwed screw rod in both ends in the U-shaped card locking structure 9
It is whole.The positioning knot of 8 formula of snap fastener of concaveconvex structure is additionally provided in the mating surface of the 1# cores, 2# cores and 3# cores
Structure.
Face of the 1# cores with exhaust manifold structure is the first die joint 10, the cavity on first die joint 10
Structure is the first total air escape pipe 15 for exhaust manifold other than the first cutting face along a half structure of central axes and the
Two total air escape pipes 18 are located at the structure other than the first cutting face 16 and side blind riser 2 is located at the part other than the first cutting face 16.
Simultaneously for convenient in carrying, it is additionally provided with and is hung 11 in the centre position on the both sides of the 1# cores length direction.The 1# cores
Another side relative to the first die joint 10 is planar structure, easily the 1# cores to be positioned on teeming stage, is made
For bottom core.
The two sides of the 2# cores all carries the sand core structure of exhaust manifold, wherein being set on the face of 1# cores cooperation
There are the first total air escape pipe 15, the second total air escape pipe 18 along the first cutting face 16 with the sand core structure of outer portion and the first cutting face 16
With the side blind riser 2 of inside points, the first total air escape pipe of exhaust manifold 15 and can be formed after 1# cores and 2# core group types
Two total air escape pipes 18 are along the first cutting face with the structure of outer portion and side blind riser 2.The another side of the 2# cores is equipped with branch pipe
With total tube cavity sand core 12, the buffering nest of the half cavity of cross gate 5, the half cavity of ingate 6 and sprue 4, the 3#
The one side of core is equipped with and the branch pipe and 12 mutually matched branch pipe of total tube cavity sand core and manifold external forms, cross gate 5
The structure of the other half cavity, the other half cavity of ingate 6, sprue 4 and feeding head 3, when the 2# cores and 3# cores
The branch pipe of exhaust manifold can be formed after group type and the structure of total tube portion, ingate 6, cross gate 5, sprue 4 and feeding emit
Mouth 3.Simultaneously for convenient in carrying, it is additionally provided with and is hung 11 in the centre position on the both sides of the 1# cores length direction.It is described to hang
The end face of 11 and the part U-shaped card locking structure on 2# cores is in the same face, to form the placed side of 2# cores.
Feeding head 3 is drawn out to outside core body through the 3# cores and forms emitting for feeding head 3 by the feeding head 3
Mouth outlet 13；The sprue 4 is through the 3# cores and is drawn out to outside core body, and is equipped at the outlet of sprue 4
Sprue cup fixed seat 14.
The group type of the core body of the exhaust manifold be cast for：
S1：By being placed on one side on the teeming stage in cast region for the plane of the 1# cores, and in the 1# cores in 2#
Fluid sealant is smeared in the mating surface of core；
S2：2# cores are located according to snap fastener 8 on 1# cores, and smears and seals in the mating surface of 2# cores and 3# cores
Glue；
S3：3# cores are located according to snap fastener on 2# cores, after size, gap meet the requirements between confirmation type, use screw rod
By the core body clamping；
S4：After completing described group of type, the core body is positioned over to smooth cast scene, sand is laid in the core body bottom
Bed takes other to prevent due to can be into after the overflow of casting process molten iron and/or the measure for leading to damage work-yard of splashing
Row cast.
The smearing width of the fluid sealant can be the width from the inside 20mm ~ 30mm in die joint outer.
The above disclosure is only the preferred embodiments of the present invention, and of course, the scope of rights of the present invention cannot be limited by this,
Those skilled in the art can understand all or part of the processes for realizing the above embodiment, and according to the claims in the present invention institute
The equivalent variations of work, still belong to the scope covered by the invention.
Claims (10)
1. a kind of parting scheme of automobile engine exhaust manifold, which is characterized in that as a whole by sand core and sand mold
Cutting is carried out, specific cutting method is：
The threedimensional model of exhaust manifold is put according to casting technique, and running gate system and runner system is arranged by the first step；
The exhaust manifold threedimensional model according to casting technique arrangement equipped with running gate system and runner system is placed in phase by second step
In quadrangle box in sandbox, and the exhaust manifold threedimensional model is made to be located at the centre position in the quadrangle box space,
The size of quadrangle box is determined by the minimum mold thickness of exhaust manifold threedimensional model periphery, forms exhaust manifold core body；
Third walks, and cutting is carried out to the core body, and two horizontal cutting faces is used to cut the core body for three parts, the
One cutting face is located at the central axes of the first total air escape pipe flange face, and the second cutting face is located at the central axes of branch pipe flange face,
And first cutting face it is parallel with the second cutting face, core body cutting is 1# types by the first cutting face and the second cutting face
Core, 2# cores and 3# cores.
2. the parting scheme of automobile engine exhaust manifold according to claim 1, which is characterized in that the founder
Skill is one case four more than one piece technique using unchoked running system, the arrangement mode of four exhaust manifold threedimensional models
It is aligned for branch pipe flange face two-by-two and so that the first cutting face is located at the second cutting face or less in vertical direction and be in water
Square to；The setting cross gate at the docking region of the exhaust manifold threedimensional model branch pipe flange face in pairs, and
Ingate is set at the thermal center position of branch pipe flange face, sprue is set at the docking of two cross gates, and by the sprue
Two cross gates and each ingate are connected as a complete running gate system；It is arranged in the junction of cross gate and ingate
Feeding head.
3. the parting scheme of automobile engine exhaust manifold according to claim 2, which is characterized in that institute's casting technique
In side blind riser can also be set at the first total air escape pipe flange face.
4. the parting scheme of automobile engine exhaust manifold according to claim 3, which is characterized in that the 1# cores
One side be plane, be located face as bottom core；The another side of the 1# cores is equipped with the first cutting face with outer portion
The external form of exhaust manifold structure and the first cutting face are with the side blind riser of outer portion.
5. the parting scheme of automobile engine exhaust manifold according to claim 3, which is characterized in that the 2# cores
One side relative to the first cutting face is equipped with the sand core structure of portion discharge manifold and the first cutting face other than the first cutting face
Within side blind riser；The 2# cores are equipped with branch pipe sand core, manifold sand cores, cross gate relative to the one side in the second cutting face
The buffering nest of one half structure, one half structure of ingate and sprue.
6. the parting scheme of automobile engine exhaust manifold according to claim 3, which is characterized in that the 3# cores
One side relative to the second cutting face is equipped with branch pipe external form, manifold external forms, another half structure of cross gate, another half hitch of ingate
Structure and sprue, the sprue penetrate through the 3# cores, and the feeding head of perforation is additionally provided on the 3# cores, described directly to pour
Road and the feeding head are drawn in the another side of 3# cores.
7. the parting scheme of automobile engine exhaust manifold according to claim 6, which is characterized in that the 3# cores
Another side be additionally provided with sprue cup fixed seat.
8. the parting scheme of automobile engine exhaust manifold according to claim 1, which is characterized in that the core body
It is additionally provided with clamping structure on two faces of length direction.
9. the parting scheme of automobile engine exhaust manifold according to claim 1, which is characterized in that the 1# types
The snap fastener for positioning and fixing is additionally provided in the mating surface of core, 2# cores and 3# cores.
10. the parting scheme of automobile engine exhaust manifold according to claim 1, which is characterized in that core body
Organizing type-pouring procedure is：
S1：The plane face of the 1# cores is placed on the platform to be cast in cast region, and in the 1# cores and 2# types
Fluid sealant is smeared in the mating surface of core；
S2：2# cores are located according to snap fastener on 1# cores, and smears and seals in the mating surface of 2# cores and 3# cores
Glue；
S3：3# cores are located according to snap fastener on 2# cores, after size, gap meet the requirements between confirmation type, pass through clamping
Structure is by the core body clamping；
S4：Region laying type core bed load is poured into a mould in exhaust manifold or other is taken to prevent due to casting process molten iron overflow
And/or after the measure for leading to damage work-yard of splashing, the core body that group type is completed is placed in ready exhaust manifold and is poured
It is poured into a mould in note region.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810063509.9A CN108296451A (en) | 2018-01-26 | 2018-01-26 | The parting and its parting scheme of automobile engine exhaust manifold |
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| CN201810063509.9A CN108296451A (en) | 2018-01-26 | 2018-01-26 | The parting and its parting scheme of automobile engine exhaust manifold |
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| CN108296451A true CN108296451A (en) | 2018-07-20 |
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| CN111822658A (en) * | 2020-06-28 | 2020-10-27 | 江阴宏创动能科技有限公司 | Forming die of automobile exhaust manifold and implementation method thereof |
| CN112808941A (en) * | 2020-12-30 | 2021-05-18 | 四川共享铸造有限公司 | Sand core of exhaust pipe casting and casting method thereof |
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| CN109047657A (en) * | 2018-10-22 | 2018-12-21 | 太仓黑龙智能工业科技有限公司 | A kind of 3 D-printing pressure shell sand mould and its manufacture craft |
| CN111822658A (en) * | 2020-06-28 | 2020-10-27 | 江阴宏创动能科技有限公司 | Forming die of automobile exhaust manifold and implementation method thereof |
| CN111822658B (en) * | 2020-06-28 | 2022-04-15 | 江阴宏创动能科技有限公司 | Forming die of automobile exhaust manifold and implementation method thereof |
| CN112808941A (en) * | 2020-12-30 | 2021-05-18 | 四川共享铸造有限公司 | Sand core of exhaust pipe casting and casting method thereof |
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Application publication date: 20180720 |