CN104439080A - Accurate forming metal mold casting method adopting porous steel and non-occupying coating - Google Patents
Accurate forming metal mold casting method adopting porous steel and non-occupying coating Download PDFInfo
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- CN104439080A CN104439080A CN201410648197.XA CN201410648197A CN104439080A CN 104439080 A CN104439080 A CN 104439080A CN 201410648197 A CN201410648197 A CN 201410648197A CN 104439080 A CN104439080 A CN 104439080A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/06—Permanent 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
- B22C9/06—Permanent moulds for shaped castings
- B22C9/061—Materials which make up the mould
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention relates to an accurate forming metal mold casting method adopting porous steel and non-occupying coating. The technical scheme is as follows: the method comprises the steps of manufacturing a mould base body, wherein a mold cavity of the mould base body is larger than a workpiece to be cast by a certain size; then, manufacturing a ceramic mold core, wherein the appearance of the ceramic mold core is smaller than the workpiece; fixing the ceramic mold core, and forming a gap between the mould base body and the ceramic mold core; injecting the foamed foam aluminum-steel material into the gap, and molding in the gap; after molding, processing the porous steel to enable the size of the porous steel to be accurately matched with that of the workpiece to be cast; filling and coating the pores and the surface of the porous steel by the coating used for casting uniformly to form a non-occupying coating layer, and carrying out casting operation.
Description
Technical field:
The invention belongs to materials processing technology field, particularly a kind of precise forming metal mould cast method adopting blister steel and non-occupy-place coating.
Background technology:
Foam metal finger-hole porosity [in porous body the volume of all holes and the ratio of porous body cumulative volume] reaches more than more than certain proportion, has the porous metals of some strength and rigidity.This kind of metal aperture porosity is high, and pore diameter can reach to grade.Its gas permeability is very high, is nearly all intercommunicating pore, and void ratio surface area is large, and material unit weight is very little.Powder metallurgic method manufactures foam metal, is add blowing agent (as NH4Cl) in the powder, and during sintering, blowing agent volatilization, leaves hole.With electrochemical deposition method can obtain regular shape hole, porosity up to 95% foam metal, comprising with the metals such as Cu, Ni, NiCrFe, ZnCu, NiCu, NiCrW, NiFe and alloy is the foamed material of skeleton.To be electrochemically-deposited in the metal on porous body, make deposition component connect into entirety through sintering, intensity meets the requirements of high celled foam metal, and porosity is high, can fill more material, as catalyst, electrolyte etc. in using.
Metal material containing foam-like pore is compared with general sintered porous metal, and the porosity of foam metal is higher, and aperture size is comparatively large, can reach 7 millimeters.Due to the two-phase composite material that foam metal is made up of metallic matrix skeleton continuous phase and pore decentralized photo or continuous phase, therefore its character depends on metallic matrix used, the porosity and air hole structure, and by the impact of preparation technology.Usually, the mechanical property of foam metal reduces with the increase of the porosity, and its electric conductivity, thermal conductivity also corresponding exponentially relation reduce.When foam metal bears pressure, because the subside lifting surface area that causes of pore increases and material strain hardening effect, foam metal is made to have the absorption ability for impact energy of excellence.
Practical foam metal has aluminium, nickel and alloy thereof.Foam Aluminum-aluminum alloy light weight; there is sound-absorbing, heat insulation, the characteristic such as vibration damping, absorption impact energy and electromagnetic wave, be applicable to the surge protection layer of guided missile, aircraft and its recovery part, automobile buffer; electric mechanical vibration absorber, pulse power electro-magnetic wave shield etc.Nickel foam, owing to having the air hole structure of connection and the high porosity, therefore has high aeration, high-ratio surface sum capillary force, how as functional material, for making fluid filter, atomizer, catalyst converter, battery electrode plate and heat exchanger etc.
Non-occupy-place coating is also known as transfer coatings, relative with occupy-place coating.General coating applies after making type, core, and coating curing under retraining without apperance, coating layer thickness occupies die cavity useful space position, and the brush mark, trickling, accumulation etc. of coating surface all can be replicated on cast(ing) surface, affect surface quality of continuous castings and dimensional accuracy.The appearance of Non-occupying coating process can fundamentally solve the problem.Its general principle first coating is directly sprayed onto box surface, then back-up sand consolidation, and dope layer and core solidify under the constraint of core box simultaneously, and during molding, coating can transfer to core surface thus the obtained accurate core with coating from box surface.Because dope layer does not occupy die cavity active position, thus casting dimension accuracy can not be affected.
Summary of the invention:
In view of the deficiency of above technology, the present invention is directed to the unmanageable large-scale workpiece of general NC machining center, a kind of precise forming permanent mold casting adopting blister steel and non-occupy-place coating is proposed, its technical scheme be make die cavity certain size larger than the workpiece of required casting die matrix, then the profile ceramic core less than workpiece is made, ceramic core is fixed, between die matrix and ceramic core, forms certain space; The foamed aluminium Steel material foamed is injected space, and shaping in space; After shaping, blister steel is processed, make the workpiece size exact matching of its size and required casting; By casting coating uniform filling used, the pore spreading upon blister steel and surface, namely form the dope layer of non-occupy-place, can pouring operation be carried out.
One or more in die matrix employing mould steel, high-speed steel, structural steel are made, and intrinsic silicon cavity dimension outwardly goes out 1 ~ 10mm greatly than the workpiece size of required casting.
Ceramic core adopts one or more in oxide ceramics, nitride ceramics, carbide ceramics, boride ceramics, silicide ceramics, fluoride pottery, sulfide ceramic, size 1 ~ 10mm less of the workpiece size of required casting.
Blister steel adopts the one in powder densification method, filler-port-creating method, THROUGH METHOD to make, and air vent aperture is between 0.5 ~ 2mm, and porosity is between 60 ~ 95%.
Beneficial effect:
A kind of precise forming metal mould cast method adopting blister steel and non-occupy-place coating proposed by the invention, improve in conventional metals mold casting, cannot the defect of precise forming because thickness of coating layer is difficult to control, significantly improve the formed precision of permanent mold casting, because this reducing post-production cost, the foundry goods straight forming that some are difficult to process, cannot process more can be applied to.Meanwhile, relative to traditional non-occupy-place coating methods, this method has expanded its range of application, is no longer only applicable to traditional sand casting, and can be applied to the permanent mold casting of applicable automated production in enormous quantities, is more suitable for the demand of following casting.
Accompanying drawing illustrates:
Fig. 1 is the precise forming metal mould cast method schematic diagram adopting blister steel and non-occupy-place coating
Reference numeral: 1. die matrix, the 2. non-machining area of blister steel, 3. blister steel machining area, 4. pottery
Detailed description of the invention:
For better the present invention being described, be convenient to understand technical scheme of the present invention, typical but non-limiting embodiment of the present invention is as follows.Composition graphs illustrates a kind of circular orbit industrial robot for extreme large and heavy workpiece mentioned by content of the present invention, for the processing of Large Aluminium Casting.
Die matrix adopts mould steel to make, and intrinsic silicon cavity dimension outwardly goes out 10mm greatly than the workpiece size of required casting.
Ceramic core adopts oxide ceramics, size 10mm less of the workpiece size of required casting.
Blister steel adopts powder densification method to make, air vent aperture at 1mm, porosity 80%.
After blister steel is made, shown in Fig. 1, machining area blister steel is machined away, be formed at the inner chamber of casting dimension coupling.
By casting coating uniform filling used, the pore spreading upon blister steel and surface, namely form the dope layer of non-occupy-place, can pouring operation be carried out.
Applicant states, above content is in conjunction with concrete preferred embodiment further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (4)
1. one kind adopts the precise forming metal mould cast method of blister steel and non-occupy-place coating, it is characterized in that: make die cavity certain size larger than the workpiece of required casting die matrix, then the profile ceramic core less than workpiece is made, ceramic core is fixed, between die matrix and ceramic core, forms certain space; The foamed aluminium Steel material foamed is injected space, and shaping in space; After shaping, blister steel is processed, make the workpiece size exact matching of its size and required casting; By casting coating uniform filling used, the pore spreading upon blister steel and surface, namely form the dope layer of non-occupy-place, can pouring operation be carried out.
2. the precise forming metal mould cast method according to right 1, it is characterized in that: one or more in die matrix employing mould steel, high-speed steel, structural steel are made, and intrinsic silicon cavity dimension outwardly goes out 1 ~ 10mm greatly than the workpiece size of required casting.
3. the precise forming metal mould cast method according to right 1, it is characterized in that: ceramic core adopts one or more in oxide ceramics, nitride ceramics, carbide ceramics, boride ceramics, silicide ceramics, fluoride pottery, sulfide ceramic, size 1 ~ 10mm less of the workpiece size of required casting.
4. the precise forming metal mould cast method according to right 1, is characterized in that: blister steel adopts the one in powder densification method, filler-port-creating method, THROUGH METHOD to make, and air vent aperture is between 0.5 ~ 2mm, and porosity is between 60 ~ 95%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410648197.XA CN104439080A (en) | 2014-11-15 | 2014-11-15 | Accurate forming metal mold casting method adopting porous steel and non-occupying coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410648197.XA CN104439080A (en) | 2014-11-15 | 2014-11-15 | Accurate forming metal mold casting method adopting porous steel and non-occupying coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104439080A true CN104439080A (en) | 2015-03-25 |
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| CN201410648197.XA Pending CN104439080A (en) | 2014-11-15 | 2014-11-15 | Accurate forming metal mold casting method adopting porous steel and non-occupying coating |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114505457A (en) * | 2020-11-16 | 2022-05-17 | 鞍钢股份有限公司 | Horizontal continuous casting system for foam steel and preparation process of foam steel |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0472004A (en) * | 1990-04-13 | 1992-03-06 | Daido Steel Co Ltd | Manufacture of porous metallic mold |
| CN1065612A (en) * | 1991-04-09 | 1992-10-28 | 机械电子工业部沈阳铸造研究所 | Self-hardening coating transfer method |
| JPH0633112A (en) * | 1992-07-17 | 1994-02-08 | Sintokogio Ltd | Production of porous mold material |
| CN1153688A (en) * | 1995-09-22 | 1997-07-09 | 新东工业株式会社 | Porous mold material for casting and method of producing the same |
| CN101569920A (en) * | 2009-06-09 | 2009-11-04 | 华中科技大学 | Transfer paint for foaming mould |
| CN102825211A (en) * | 2012-09-19 | 2012-12-19 | 中北大学 | Non-occupying coating and application thereof |
| CN102974753A (en) * | 2012-12-06 | 2013-03-20 | 上海应用技术学院 | Non-occupying coating and using method thereof |
-
2014
- 2014-11-15 CN CN201410648197.XA patent/CN104439080A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0472004A (en) * | 1990-04-13 | 1992-03-06 | Daido Steel Co Ltd | Manufacture of porous metallic mold |
| CN1065612A (en) * | 1991-04-09 | 1992-10-28 | 机械电子工业部沈阳铸造研究所 | Self-hardening coating transfer method |
| JPH0633112A (en) * | 1992-07-17 | 1994-02-08 | Sintokogio Ltd | Production of porous mold material |
| CN1153688A (en) * | 1995-09-22 | 1997-07-09 | 新东工业株式会社 | Porous mold material for casting and method of producing the same |
| CN101569920A (en) * | 2009-06-09 | 2009-11-04 | 华中科技大学 | Transfer paint for foaming mould |
| CN102825211A (en) * | 2012-09-19 | 2012-12-19 | 中北大学 | Non-occupying coating and application thereof |
| CN102974753A (en) * | 2012-12-06 | 2013-03-20 | 上海应用技术学院 | Non-occupying coating and using method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114505457A (en) * | 2020-11-16 | 2022-05-17 | 鞍钢股份有限公司 | Horizontal continuous casting system for foam steel and preparation process of foam steel |
| CN114505457B (en) * | 2020-11-16 | 2023-08-18 | 鞍钢股份有限公司 | Horizontal continuous casting system of foam steel and foam steel preparation process |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150325 |
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