CN103611920A - Casting-in method of steel pipe in casting - Google Patents
Casting-in method of steel pipe in casting Download PDFInfo
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- CN103611920A CN103611920A CN201310548609.8A CN201310548609A CN103611920A CN 103611920 A CN103611920 A CN 103611920A CN 201310548609 A CN201310548609 A CN 201310548609A CN 103611920 A CN103611920 A CN 103611920A
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Abstract
The invention relates to a casting-in method of a steel pipe in a casting. According to the method, the steel pipe is subjected to surface electroplating, the steel pipe is filled with sand and compacted, two ends of the steel pipe are plugged with resin sand, the steel pipe is pre-embedded in a sand box, one end of the steel pipe is inserted and fixed in a core, the other end of the steel pipe is extended out of the sand box, and free telescoping is allowed. The surrounding of the steel pipe is avoided during casting, and directly scouring the steel pipe with molten metal is avoided. Deformation of the steel pipe can be reduced greatly, and bending degree is controlled in an allowable range. The inner wall of the steel pipe is easy to clean; after cleaning, the inner wall is smooth and free of sticking sand; waste is avoided, and quality is improved.
Description
Technical field
The present invention relates to steel pipe embedding method in a kind of foundry goods, belong to casting technology field.
Background technology
The casting frame of middle diesel engine, main lubrication hole diameter, in φ 100mm left and right, between length 3m～4m, requires aperture even, and inner wall smooth, axially can not have too large bending, fold, and slotted hole must seal completely, and in work, lubricating oil supply is abundant.Because grease way slotted hole must seal completely, so that the core in when casting must link up is as a whole, can not disconnect.Core moulding greatest problem is because length is long, causes intensity low, easily fracture.After fracture, form iron burnt-in sand, be difficult to cleaning, and even scrap.Another reverse side, sand mold inwall is smooth not, must use specific purpose tool (extension bar emery wheel), and polishing, just can reach requirement for a long time.Axially can not there be too large bending, fold.Interlude must support with stud, and stud is included in molten iron, if merge badly, will cause seepage.If main grease way does not cast out, but by being processed to form, one is that difficulty of processing is larger, and the thermojunction that the casting of the high ，Er Shi of equipment requirement center is formed, easily produces shrinkage defect, causes seepage.Therefore just there is the scheme of a pre-buried seamless steel pipe.But can cause frame to scrap due to steel pipe fusing and internal diameter bending in casting process.Some problems can could be found after machining cylinder block finishes.
Summary of the invention
Object of the present invention overcomes the deficiency of above-mentioned prior art exactly, and steel pipe embedding method in a kind of foundry goods is provided, and prevents that main grease way is crooked, ensures steel pipe and body parent good knitting, inner wall smooth free from admixture.Guarantee main grease way size, the requirement of serviceability coincidence pattern.
The object of the present invention is achieved like this: steel pipe embedding method in a kind of foundry goods, is characterized in that taking the following step:
A. steel pipe is carried out to electroplating surface processing;
B. after real to back-up sand Chong in steel pipe, with resin sand shutoff two ends;
C. steel pipe is embedded into sandbox, one end is inserted in core fixing, and the other end extends to sandbox outside, can free shrink;
While D. pouring into a mould, avoid around steel pipe, do not make molten metal directly wash away steel pipe.
In order to realize better object of the present invention, in steps A, thickness of coating is 0.03～0.05mm.
In order to realize better object of the present invention, in step B, back-up sand is the silica sand of 12 order granularities;
In order to realize better object of the present invention, step B medial end portions shutoff length is about 80mm.
The solution of the present invention, can make pipe deformation amount greatly reduce, and degree of crook is controlled within the range of permission.Steel pipe inner wall is easy to cleaning, smooth without scab after cleaning.Stop waste product, improve quality.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the interior steel pipe embedding method of foundry goods of the embodiment of the present invention.
The specific embodiment
For making object, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
In the foundry goods of the present embodiment, steel pipe embedding method is divided into four steps.
First steel pipe is carried out to electroplating surface processing.Steel pipe material selection 20# seamless hot steel pipe, the steel pipe of purchasing is due to autoxidation, and there is iron rust in surface, iron rust composition is Fe2O3, when high temperature, can decomposite a large amount of gas, and while causing pouring into a mould, gas forming amount is large, easily near oil duct, produce gas hole defect, cause the rear oil duct leakage of oil of processing.Therefore, carry out electroplating surface processing (coating material can be the not easy oxidation metal such as chromium (Cr), nickel (Ni), tin (Sn), zinc (Zn)) to steel pipe.This coating plays stable metal liquid and flows, and promotes molten metal and steel pipe fused, completely cuts off the effect of returning rust of adhering to of die cavity steam simultaneously.Before plating, should remove the subsidiary fifth wheel of surperficial oil sealing, greasy dirt, paint, metal fillings and machining.Part machinery-free deformation and damage to be plated, the defects such as non-scale, spot, pit, exoncoma, burr.All outer surfaces Du Chrome, thickness of coating is 0.03～0.05mm.Between the coating layer after plating and parent metal, in conjunction with firmly, through frustrating each interlayer of the skill in using a kitchen knife in cookery, do not answer peeling, bubble or be full of cracks.With organic solution (alcohol or acetone) wiping, do not come off.
After real to back-up sand Chong in steel pipe, with resin sand shutoff two ends.Steel pipe is subject to molten iron buoyancy when cast, and steel pipe will float, and buoyancy is excessive, produces the floating internal diameter that makes crooked, or transdermal.Constancy of volume, antagonism buoyancy will be gained in weight.So back-up sand in steel pipe.But also can balance the pressure of molten iron to steel duct during casting.In the inside of steel pipe, put into granularity and be 12 objects " silica sand " as filler, and Chong is real, at two ends with resin sand shutoff (length is about 80mm).Can improve so the counter-bending ability of steel pipe, the inside and outside pressure of steel pipe during all right balance feeding is avoided forming scab at steel pipe inner wall simultaneously, affects fineness.
Steel pipe is embedded into sandbox, and one end is inserted in core fixing, and the other end extends to sandbox outside, can free shrink.In casting cycle, steel pipe is under the encirclement of high temperature iron liquid liquation, and steel pipe will expand naturally.Deflection after cannot determining and control steel pipe and being heated, can only just omit estimation.Inflation table now radially with axial both direction.Radial dimension is less negligible.On length direction, the line expansion factor of steel is 0.000011, and the long elongation of 4000m is 2.5mm left and right so, can make the center of steel pipe arch upward, and causes bending even to appear foundry goods.Maximum point departs from die 50mm, but actual conditions often occur in the mode of positive and negative deviation, i.e. actual axis, left and right skew upper and lower around raw steel tube hub, and middle maximum, successively decrease in two ends.Steel pipe embedded part one end is extended to sandbox outside, can free shrink.The other end inserts in core fixing, guarantees the rigidity of steel pipe location, thereby steel pipe is located accurately.
Cast.The design of running gate system position, avoid around steel pipe, does not make molten metal directly wash away steel pipe.
Finally it should be noted that: above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (4)
1. a steel pipe embedding method in foundry goods, is characterized in that taking the following step:
A. steel pipe is carried out to electroplating surface processing;
B. after real to back-up sand Chong in steel pipe, with resin sand shutoff two ends;
C. steel pipe is embedded into sandbox, one end is inserted in core fixing, and the other end extends to sandbox outside, can free shrink;
While D. pouring into a mould, avoid around steel pipe, do not make molten metal directly wash away steel pipe.
2. steel pipe embedding method in foundry goods according to claim 1, is characterized in that in steps A, thickness of coating is 0.03～0.05mm.
3. steel pipe embedding method in foundry goods according to claim 1, is characterized in that in step B, back-up sand is the silica sand of 12 order granularities.
4. steel pipe embedding method in foundry goods according to claim 1, is characterized in that step B medial end portions shutoff length is about 80mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310548609.8A CN103611920A (en) | 2013-11-06 | 2013-11-06 | Casting-in method of steel pipe in casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310548609.8A CN103611920A (en) | 2013-11-06 | 2013-11-06 | Casting-in method of steel pipe in casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103611920A true CN103611920A (en) | 2014-03-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201310548609.8A Pending CN103611920A (en) | 2013-11-06 | 2013-11-06 | Casting-in method of steel pipe in casting |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106735092A (en) * | 2017-01-13 | 2017-05-31 | 共享装备股份有限公司 | One-armed pipe castingin forming method |
| CN107313831A (en) * | 2017-08-25 | 2017-11-03 | 扬州市邗江开元滤清器厂 | A kind of oil filter seat and its production technology that metal tube is buried in |
| CN107570689A (en) * | 2017-09-05 | 2018-01-12 | 合肥江淮铸造有限责任公司 | A kind of casting air flue processing method |
| CN108788095A (en) * | 2018-06-20 | 2018-11-13 | 四川共享铸造有限公司 | The casting method of castingin oil duct steel pipe |
| CN112872317A (en) * | 2021-01-07 | 2021-06-01 | 重庆联陆机械有限公司 | Production method of air compressor cylinder cover, soil piece for production, die-casting die and cylinder cover |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0466257A (en) * | 1990-07-02 | 1992-03-02 | Komoda:Kk | Method for casting metal pipe in consumable casting method |
| CN1107399A (en) * | 1994-03-28 | 1995-08-30 | 本溪钢铁公司 | Anti-oxidation method for inwall of steel pipe inlaid in casting |
| JPH11347708A (en) * | 1998-06-04 | 1999-12-21 | Nissan Diesel Motor Co Ltd | Shielding member of cast-in pipe, and casting method using it |
| CN101181742A (en) * | 2007-11-27 | 2008-05-21 | 宁夏共享集团有限责任公司 | Method for cooling pipe cast-in of machine tool guide |
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2013
- 2013-11-06 CN CN201310548609.8A patent/CN103611920A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0466257A (en) * | 1990-07-02 | 1992-03-02 | Komoda:Kk | Method for casting metal pipe in consumable casting method |
| CN1107399A (en) * | 1994-03-28 | 1995-08-30 | 本溪钢铁公司 | Anti-oxidation method for inwall of steel pipe inlaid in casting |
| JPH11347708A (en) * | 1998-06-04 | 1999-12-21 | Nissan Diesel Motor Co Ltd | Shielding member of cast-in pipe, and casting method using it |
| CN101181742A (en) * | 2007-11-27 | 2008-05-21 | 宁夏共享集团有限责任公司 | Method for cooling pipe cast-in of machine tool guide |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106735092A (en) * | 2017-01-13 | 2017-05-31 | 共享装备股份有限公司 | One-armed pipe castingin forming method |
| CN107313831A (en) * | 2017-08-25 | 2017-11-03 | 扬州市邗江开元滤清器厂 | A kind of oil filter seat and its production technology that metal tube is buried in |
| CN107313831B (en) * | 2017-08-25 | 2024-04-02 | 扬州市邗江开元滤清器厂 | Oil filter seat adopting embedded metal pipe and production process thereof |
| CN107570689A (en) * | 2017-09-05 | 2018-01-12 | 合肥江淮铸造有限责任公司 | A kind of casting air flue processing method |
| CN108788095A (en) * | 2018-06-20 | 2018-11-13 | 四川共享铸造有限公司 | The casting method of castingin oil duct steel pipe |
| CN112872317A (en) * | 2021-01-07 | 2021-06-01 | 重庆联陆机械有限公司 | Production method of air compressor cylinder cover, soil piece for production, die-casting die and cylinder cover |
| CN112872317B (en) * | 2021-01-07 | 2022-04-15 | 重庆联陆机械有限公司 | Production method of air compressor cylinder cover, insert for production, die-casting die and cylinder cover |
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Application publication date: 20140305 |