CN106513582B - A kind of running gate system of half bend pipe - Google Patents
A kind of running gate system of half bend pipe Download PDFInfo
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- CN106513582B CN106513582B CN201611268900.XA CN201611268900A CN106513582B CN 106513582 B CN106513582 B CN 106513582B CN 201611268900 A CN201611268900 A CN 201611268900A CN 106513582 B CN106513582 B CN 106513582B
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- bend pipe
- die cavity
- half bend
- ingate
- pipe die
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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
-
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention discloses a kind of running gate system of half bend pipe, belong to the manufacturing field of transporting elbow structure.In the present invention, half bend pipe is the half that a bend pipe is cut vertically, and half bend pipe is half of the bend pipe close to wrap direction side；Half bend pipe is designed as thickening thickening to middle D with both sides C from ends A to middle B；In the present invention, sand mold is made by clay, the sand mold is parallel to each other including several and half horizontal positioned bend pipe die cavity, and the half bend pipe die cavity is according to the structure fabrication of half bend pipe, and the opening of half bend pipe die cavity is downward；Same ingate is connected with the respective side of two neighboring half bend pipe die cavity, the ingate is connected by the cross gate above it with sprue, and sprue connects with the sprue cup above it.Large-tonnage product defect be present in casting process it is an object of the invention to overcome the shortcomings of existing half bend pipe, there is provided a kind of running gate system of half bend pipe, its half bend pipe product defects cast out substantially reduce.
Description
Technical field
The present invention relates to a kind of transporting elbow of the industries such as building, mine, metallurgy, electric power, oil, coal, grain processing
The manufacture of structure, more specifically to a kind of running gate system of half bend pipe.
Background technology
The forming technique of bend pipe mainly has casting, compression molding etc., and they are all to rely on mould, pass through cast
Or hot cold-press process profiling generation；Either any machinery equipment and pipeline, it is most of all to use bend pipe, mainly to
Convey various materials；The material of bend pipe has the materials such as cast iron, stainless steel, steel alloy, malleable cast iron, carbon steel, non-ferrous metal and plastics
Matter；In the industries such as building, mine, metallurgy, electric power, oil, coal, grain processing, the conveying of material is to pass through pipeline pressure
Conveying, delivery pipe is by larger pressure and serious abrasion.Therefore there is higher synthesis to delivery pipe, particularly bridge piece
Performance requirement, the service life of bend pipe is improved, it is difficult the problem captured to have turned into.
It is individual layer Technique of High Magnesium Bend Pipe that bend pipe is the most widely used at present, also has and uses double-deck rich chromium cast iron bend pipe on a small quantity.
Individual layer Technique of High Magnesium Bend Pipe anti-wear performance is poor, and hardness is low, and security is low；Double-layer wear-resistant bend pipe cost is high, and quality is preferable, anti-wear performance
Excellent, hardness is high, safe, but cost performance is not high；Developing the abrasion-proof bent tube that a kind of excellent performance, cost are low, security is good is
Whole industry is there is an urgent need to the work of development, under the mechanism and different working condition by grasping pipe wear, the stream of material
Flowing mode, pipeline region most easy to wear is simulated, and the region can be improved wearing layer thickness or improve the region material
Anti-wear performance, to reach the overall purpose for improving the bend pipe life-span, it is that client is cost-effective, is economized on resources for society.
Disclosed in the prior art on the existing related art scheme of wear resistant and impact resistant bend pipe, such as patent publication No.：CN
204717206U, publication date：On October 21st, 2015, invention and created name are：A kind of outer overall, interior two points of two-layer equations are wear-resisting anti-
Bend pipe is impacted, this application case discloses a kind of outer overall, interior two points of two-layer equations wear resistant and impact resistant bend pipe, and it is by two points in outer entirety
Double-deck bend pipe, two wear-resisting adpting flanges, seam flange composition；This outer overall, interior two points of two-layer equation wear resistant and impact resistants bend pipe is used
In the adverse circumstances of the industries such as building, mine, metallurgy, electric power, oil, coal, grain processing, it is designed as outer overall, interior two points
Double-deck unique texture, is divided into protective layer and wearing layer, and anti-wear performance is good, service life length, cost-effective, easily realizes large quantities of
Amount production, steady quality is reliable, and security performance is high.
But technical problem existing for above-mentioned application case is：The structure of wherein half bend pipe belongs to the abnormity of casting field
Part, large-tonnage product defect be present in its casting process, how to overcome large-tonnage product defect present in above-mentioned casting process, be existing
There is the technical problem of urgent need to resolve in technology.
The content of the invention
1. invention technical problems to be solved
Large-tonnage product defect be present in casting process it is an object of the invention to overcome the shortcomings of existing half bend pipe, there is provided
A kind of running gate system of half bend pipe, its half bend pipe product defects cast out substantially reduce.
2. technical scheme
To reach above-mentioned purpose, technical scheme provided by the invention is：
The running gate system of half bend pipe of the present invention, half bend pipe are the half cut vertically of a bend pipe, and this is half curved
Manage the half close to wrap direction side for the bend pipe；The wrap direction is direction of the bend pipe by Inside To Outside；It is described
Half bend pipe is designed as thickening thickening to middle D with both sides C from ends A to middle B.
As further improvement of the present invention, sand mold is made by clay, the sand mold be parallel to each other including several and
Half horizontal positioned bend pipe die cavity, the half bend pipe die cavity is according to the structure fabrication of half bend pipe, and the half bend pipe die cavity
Opening is downward；Same ingate is connected with the respective side of two neighboring half bend pipe die cavity, the ingate passes through its top
Cross gate connected with sprue, sprue connects with the sprue cup above it.
As further improvement of the present invention, the ingate be one along half bend pipe die cavity side camber bar shaped square
Shape chamber.
As further improvement of the present invention, the cross gate its upside be on half bent tube type cavity length direction in
Between to both sides extend two inclined-planes, the cross gate its downside be with the ingate on the upside of coordinate arcwall face.
As further improvement of the present invention, each ingate includes some sections, is filled between adjacent two sections of ingates
There is clay layer.
As further improvement of the present invention, the cross gate is provided with the contraction mouth to contract, the contraction mouth
Lateral cross section is zigzag, and contraction mouth is close to the connectivity part of cross gate and ingate.
As further improvement of the present invention, the centre on the upside of the half bend pipe die cavity is provided with rising head, the rising head and half
Bend pipe die cavity connectivity part is up big and down small trapezoidal chamber.
3. beneficial effect
Using technical scheme provided by the invention, compared with prior art, there is following remarkable result：
(1) according to incompletely statistics, the market of domestic and international plumbing installations is more than 100,000,000,000 yuan, and the bend pipe of concrete mixer disappears
Consumption also has tens yuan, consumes steel hundreds of thousands ton.The service life of conventional pumps car Technique of High Magnesium Bend Pipe in 10,000 sides or so, and
Using half bend pipe produced by the present invention, its service life is verified more than 40,000 sides, therefore, the present embodiment system by actual production
Half bend pipe made has wide market prospects, while also complies with national energy-saving emission reduction, clean and effective, the production of green circulatory development
Industry policy.
(2) present invention in, ingate be one along half bend pipe die cavity side camber bar shaped rectangular cavity, cross gate its upside
For two inclined-planes extended on half bent tube type cavity length direction from centre to both sides, its downside of cross gate is and ingate upside
The arcwall face of cooperation, designed by the special construction of ingate and cross gate, it is curved can make it that molten iron uniformly gently flows into half
In tubular cavity, so as to significantly improve the final castability of half bend pipe, large-tonnage product defect is avoided.
(3) in the present invention, the thickness of two sides of half bend pipe is relatively thin, easily deforms after casting herein, and in the present invention
Half bend pipe of manufacture is used cooperatively with miscellaneous part, therefore the requirement to size is very strict, based on this, in the present invention,
Set each ingate to include some sections, clay layer is filled between adjacent two sections of ingates, because ingate is using point at interval
Segmentation structure so that the respective side of two neighboring half bend pipe die cavity is not easy that small change occurs because of the overall solidification of ingate
Shape, so as to greatly improve the dimensional accuracy of half bend pipe casting.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below by embodiment it is required use it is attached
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, therefore be not construed as pair
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other related accompanying drawings.
Fig. 1 is the structural representation of half bend pipe in embodiment 1；
Fig. 2 is the cross section structure schematic diagram of half bend pipe in embodiment 1；
Fig. 3 is the vertical section structure schematic diagram of half bend pipe in embodiment 1；
Fig. 4 is the main structure diagram of sand mold in embodiment 1；
Fig. 5 is the overlooking the structure diagram (being not drawn into sprue cup and sprue) of sand mold in embodiment 1；
Fig. 6 is along the structural representation (being not drawn into half bend pipe die cavity) of Z-direction in Fig. 5；
Fig. 7 is the structural representation at X along Y-direction in Fig. 5；
Fig. 8 is the flow chart of the manufacture method of half bend pipe of embodiment 1.
Label declaration in schematic diagram：1st, half bend pipe；2nd, half bend pipe die cavity；201st, rising head；202nd, sprue cup；203rd, it is horizontal to pour
Road；2031st, contraction mouth；204th, ingate.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, rather than whole embodiments.Therefore, embodiments of the invention to providing in the accompanying drawings below
Detailed description be not intended to limit the scope of claimed invention, but be merely representative of the present invention selected embodiment.
Based on the embodiment in the present invention, those of ordinary skill in the art are obtained all under the premise of creative work is not made
Other embodiment, belong to the scope of protection of the invention.
To further appreciate that present disclosure, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.
Embodiment 1
With reference to figure 1~8, the manufacture method of half bend pipe of the present embodiment, wherein, half bend pipe 1 is that a bend pipe is cut vertically
Half, and half bend pipe 1 be bend pipe close to wrap direction side half；Wrap direction is side of the bend pipe by Inside To Outside
To in specific the present embodiment, half bend pipe 1 is designed as thickening thickening to middle D with both sides C from ends A to middle B.The present embodiment
Specifically include following steps：Step A, raw material configures；Step B, running gate system makes；Step C, raw material melting；Step D, pour into a mould
Shaping；Step E, it is heat-treated.
Wherein, in step A, starting material element includes following by mass percentage：C：3.6-3.8%, Cr：26~28%, Mo：
0.3~0.5%, Cu：0.4~0.5%, Ni：0.6~0.8%, V：0.3~0.5%, Si, Mn≤0.8%, P, S≤
0.04%, the raw material of above-mentioned mass percent cooperates, and is verified through actual production, the wear resistance of high-chromium iron that it casts out is big
Big to improve, service life is more than 3 times of common high-manganese steel, and product hardness can reach HRC：63~65.
In step B：Sand mold is made by clay, the sand mold is parallel to each other including several and half horizontal positioned bent tube type
Chamber 2, the half bend pipe die cavity 2 is according to the structure fabrication of half bend pipe 1, and the opening of half bend pipe die cavity 2 is downward；Two neighboring half is curved
Same ingate 204 is connected with the respective side of tubular cavity 2, the ingate 204 is poured by the cross gate 203 above it with perpendicular
Road connects, and sprue connects with the sprue cup 202 above it.
Ingate 204 be one along the side camber of half bend pipe die cavity 2 bar shaped rectangular cavity, cross gate 203 its upside be
Two inclined-planes extended on the length direction of half bend pipe die cavity 2 from centre to both sides, its downside of cross gate 203 are and ingate 204
The arcwall face that upside coordinates, each ingate 204 include some sections, clay layer are filled between adjacent two sections of ingates 204；It is horizontal
Running channel 203 is provided with the contraction mouth 2031 to contract, and the lateral cross section of the contraction mouth 2031 is zigzag, and contraction mouth 2031
Close to the connectivity part of cross gate 203 and ingate 204；The centre of the upside of half bend pipe die cavity 2 is provided with rising head 201, the rising head 201 and
The connectivity part of half bend pipe die cavity 2 is up big and down small trapezoidal chamber.
Half bend pipe 1 is mainly used in cement pump truck delivery pipe junction in the present embodiment, for conveying cement, due in
Specific position, it is easier to wear, past material therefor is stamping steel plate, high manganese steel material etc., is easy to abrasion, service life is not
It is long, consider that anti-wear performance will get well, so using high chromium cast iron material in the present embodiment, produced with casting method.In the present embodiment
Half bend pipe 1 of manufacture, analyzed from product structure, the product wall unevenness is even, and wall thickness is very thin (thick middle, four sides are thin), most thick
Position dimension is 18mm, and most thin position dimension is only 5mm (both sides for being located at half bend pipe 1), wall thickness difference ﹥ 1/2, can be included in casting
Special-shaped thin wall part in industry, the product of difficult and complicated cases is belonged in casting industry.Inventor is curved in propose the present embodiment half
Before the manufacture method of pipe, lot of experiments is carried out, but because half bend pipe 1 belongs to thin-wall special-shaped pipe, wall unevenness is even, installation
It is required that harsh, occur large-tonnage product defect during foundry trial, scrappage remain high always (scrappage up to 50% with
On), its experiment process substantially is as follows：Because hardness requirement is high, casting rich chromium cast iron production is used instead by original steel plate punched, it is raw
Production. art is lost foam process, and the difficult point of evaporative pattern production technology because product structure belongs to tubulose, and carries just in moulding
Angle, the moulding sand degree of packing of shaking can not reach requirement, and product wall thickness is thin, thinnest part 5mm so that and moulding intensity can not reach,
Easily routed case and deformation, and also easily there is the phenomenon of misrun in product wall thickness thin location, therefore, lost foam process mainly lacks
Fall into is burst case, misrun and deformation；The production of varying level moulding line and the production of vertical moulding line are attempted afterwards, but
The different product defectses for being difficult to overcome are brought, such as the problems such as cold shut, core are loose, shrinkage cavity.By summarizing failure experiment
Experience, inventor are had found, it is desirable to which the step for avoiding product defects most critical is taken into full account in the manufacturing process of running gate system
Various factors, and existing sand mold is improved, verified by follow-up test of many times：Using the sand mould structure in the present embodiment, energy
It is enough effectively to avoid the large-tonnage product defect that half bend pipe 1 occurs in casting process so that the defect rate control of product 10% with
Under, achieve significant manufacturing effect.
Concrete analysis is as follows：In the present embodiment, ingate 204 be one along the side camber of half bend pipe die cavity 2 bar shaped square
Shape chamber, its upside of cross gate 203 is two inclined-planes extended on the length direction of half bend pipe die cavity 2 from centre to both sides, horizontal to pour
Its downside of road 203 is the arcwall face coordinated with the upside of ingate 204, is set by the special construction of ingate 204 and cross gate 203
Meter, can cause molten iron uniformly gently to flow into half bend pipe die cavity 2, so as to significantly improve the final castability of half bend pipe 1,
Avoid large-tonnage product defect；Wherein, the thickness of two sides of half bend pipe 1 is relatively thin, easily deforms after casting herein, and this reality
Apply half bend pipe 1 manufactured in example to be used cooperatively with miscellaneous part, therefore the requirement to size is very strict, based on this, this
In embodiment, set each ingate 204 to include some sections, fill clay layer between adjacent two sections of ingates 204, poured due to interior
Road 204 is using the segmentation structure being spaced so that the respective side of two neighboring half bend pipe die cavity 2 is not easy because of ingate 204
Entirety solidifies and micro-strain occurs, so as to greatly improve the dimensional accuracy of half bend pipe 1 casting；Wherein, cross gate 203 is provided with
To the contraction mouth 2031 of contract, the lateral cross section of the contraction mouth 2031 is zigzag, and contraction mouth 2031 is close to cross gate 203
With the connectivity part of ingate 204, the structure setting of above-mentioned contraction mouth 2031 so that molten iron, can be gently in close flowed
Side corresponding to half bend pipe die cavity 2 is entered by ingate 204, so that the side edge of half bend pipe 1 of casting is not easy to form punching
Sand, it is ensured that its dimensional accuracy；Wherein, the centre of the upside of half bend pipe die cavity 2 is provided with rising head 201, the bend pipe die cavity of rising head 201 and half
2 connectivity parts are up big and down small trapezoidal chamber, and by the setting of trapezoidal chamber, molten iron can be efficiently entering the upside of half bend pipe die cavity 2
Centre, the effect of riser feeding is given full play to, the problem of avoiding product core loose.
According to incompletely statistics, the market of domestic and international plumbing installations is more than 100,000,000,000 yuan, and the bend pipe of concrete mixer consumes
Amount also has tens yuan, consumes steel hundreds of thousands ton.The service life (pump concrete amount) of conventional pumps car Technique of High Magnesium Bend Pipe is 1
Left and right incomparably, and half bend pipe 1 of the present embodiment manufacture is used, its service life is verified more than 40,000 sides by actual production, because
This, half bend pipe 1 of the present embodiment manufacture has wide market prospects, while also complies with national energy-saving emission reduction, clean and effective, green
The industrial policy of color cycle development.
Schematically the present invention and embodiments thereof are described above, this describes no restricted, institute in accompanying drawing
What is shown is also one of embodiments of the present invention, and actual structure is not limited thereto.So if common skill of this area
Art personnel are enlightened by it, without departing from the spirit of the invention, without designing and the technical scheme for creativeness
Similar frame mode and embodiment, protection scope of the present invention all should be belonged to.
Claims (1)
1. a kind of running gate system of half bend pipe, the half that half bend pipe (1) is cut vertically for a bend pipe, and half bend pipe
(1) half for the bend pipe close to wrap direction side；The wrap direction is direction of the bend pipe by Inside To Outside；It is special
Sign is：Half bend pipe (1) is designed as thickening thickening to middle D with both sides C from ends A to middle B；
Sand mold is made by clay, the sand mold is parallel to each other including several and half horizontal positioned bend pipe die cavity (2), and this is half curved
Tubular cavity (2) is according to the structure fabrication of half bend pipe (1), and the opening of the half bend pipe die cavity (2) is downward；It is two neighboring
Same ingate (204) is connected with the respective side of half bend pipe die cavity (2), the ingate (204) is poured by horizontal above it
Road (203) connects with sprue, and sprue connects with the sprue cup (202) above it；
The ingate (204) be one along half bend pipe die cavity (2) side camber bar shaped rectangular cavity；
Its upside of the cross gate (203) is oblique for extend on half bend pipe die cavity (2) length direction from centre to both sides two
Face, its downside of the cross gate (203) are the arcwall face with coordinating on the upside of the ingate (204)；
Each ingate (204) includes some sections, and clay layer is filled between adjacent two sections of ingates (204)；
The cross gate (203) is provided with the contraction mouth (2031) to contract, and the lateral cross section of the contraction mouth (2031) is saw
Tooth form, and contraction mouth (2031) is close to the connectivity part of cross gate (203) and ingate (204)；
Centre on the upside of the half bend pipe die cavity (2) is provided with rising head (201), the rising head (201) and half bend pipe die cavity (2) connectivity part
For up big and down small trapezoidal chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201611268900.XA CN106513582B (en) | 2016-12-31 | 2016-12-31 | A kind of running gate system of half bend pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611268900.XA CN106513582B (en) | 2016-12-31 | 2016-12-31 | A kind of running gate system of half bend pipe |
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| CN106513582A CN106513582A (en) | 2017-03-22 |
| CN106513582B true CN106513582B (en) | 2018-01-12 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107695304A (en) * | 2017-10-10 | 2018-02-16 | 桐城市文才管业有限公司 | A kind of method for manufacturing bent pipe |
| CN109676111A (en) * | 2019-01-23 | 2019-04-26 | 马鞍山市海天重工科技发展有限公司 | The running gate system of half bend pipe of fibre reinforced |
| CN109648049B (en) * | 2019-01-23 | 2020-05-12 | 马鞍山市海天重工科技发展有限公司 | Manufacturing method of carbon fiber reinforced half-bent pipe |
| CN113828735B (en) * | 2021-09-18 | 2023-06-16 | 江苏金诺炉辊有限公司 | Pouring system and investment casting process of high-temperature alloy elbow |
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| Publication number | Publication date |
|---|---|
| CN106513582A (en) | 2017-03-22 |
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