CN102198487B - Fitting-structure-based dieless assembly molding method - Google Patents
Fitting-structure-based dieless assembly molding method Download PDFInfo
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- CN102198487B CN102198487B CN2010101506027A CN201010150602A CN102198487B CN 102198487 B CN102198487 B CN 102198487B CN 2010101506027 A CN2010101506027 A CN 2010101506027A CN 201010150602 A CN201010150602 A CN 201010150602A CN 102198487 B CN102198487 B CN 102198487B
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- sand
- piecemeal
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- sand lump
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- 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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- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
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Abstract
The invention discloses a fitting-structure-based dieless assembly molding method, and belongs to the technical field of casting and numerical control cutting, The method comprises the following steps of: performing block design on a computer-aided design (CAD) model according to the casting characteristics, designing a concave-convex fitting structure on the assembly surface according to the positioning characteristics of split sand blocks, and determining the assembly mode of the whole sand mold; preparing the sand blocks to be processed, and processing the sand blocks block by block; assembling the sand blocks, the assembly surfaces of which are provided with fitting structures, wherein the sand blocks can be connected by adopting mold core adhesive; and fixing the periphery of the whole sand mold, and applying a pre-tightening force to complete sand mold assembly. By the method, the traditional casting mold is saved, and the split sand blocks are assembled into a casting mold of a large casting according to the fitting principle. By the method, the assembly of the sand blocks can be quickly realized, and dislocation among the split sand blocks is prevented.
Description
Technical field
The present invention relates to a kind of mould forming method of large-scale sand-cast, belong to casting and numerical control cutting technical field.
Background technology
Make the important component part that had already developed into national economy, its industrial added value accounts for 36% of GDP, now occupies the 4th in the world.Foundry industry is that the manufacturing of manufacturing important component part, particularly heavy castings is bases of the pillar industries such as automobile, petrochemical industry, iron and steel, electric power, shipbuilding, weaving and equipment manufacturing, and its development level is to weigh the important symbol of a national overall national strength.Variation, personalization along with product, the demand of single-piece, small lot foundry goods is more and more, especially in the product development development stage, and require with short production cycle, renewal speed is fast, traditional Casting mold manufacturing method is difficult to satisfy the quick manufacturing of single and mini-batch production part.
In China, traditional manufacturing process is still continued to use in the manufacturing of single-piece, small lot heavy castings, and the crucial foundry goods of high-quality main dependence on import, particularly heavy castings production process is complicated, and quality requirement is high.Compare with industrially developed country, China exists production process many in the heavy castings production process, and the production cycle is long; Manual operations, labour intensity is large; The Mechanical processing of casting surplus is large, and raw materials consumption is many; Casting mold manufacturing technique falls behind, and casting yield is low; Shrinkage porosite, shrinkage cavity, defects i.e.cracks are many, the large problem of Repair Welding amount.Uncertainty and the complexity of tradition casting mold production method have restricted the especially heavy castings production of its foundry goods.
On the formative method of heavy castings, the domestic wooden model that generally utilizes carries out bedded-in moulding.This formative method not only the moulding time long, and the wooden model cost is high, recycling rate of waterused is low, casting accuracy is low, bad mechanical property can not be used for the moulding of complex profile.Usually the moudling cycle of wooden model is one month, and be to make at most 8 foundry goods (also once model repairing of centre) service life of a cover wooden model.When sometimes only needing one of manufacturing or two foundry goods, also must make a cover wooden model, so not only prolong the manufacturing cycle of foundry goods, also cause the waste of a large amount of high-quality timber.Also need it is carried out a large amount of finishing works after utilizing the casting pouring cooling of wood pattern molding production, increased cost, prolonged the manufacturing cycle of foundry goods, therefore being badly in need of new formative method improves present present situation.
Core assembly process also can be used for the shaping of heavy castings casting mold.The method makes behind the core its assembling by craft or machine core-making method, places sandpit to bury sand molding.This kind formative method has not only reduced the workload of frock Wooden Pattern Making, has improved security reliability, obviously lowers the difficulty of foundry goods open form, knockout.But the method moulding efficient is low, floor space is large, is suitable for the manufacturing of foundry goods in enormous quantities, and high to the molding sand quality requirement, and the fresh sand consumption is large, thereby causes its moulding high expensive, is unsuitable for the manufacturing of single-piece, small lot heavy castings.Simultaneously, in existing cored-up mould technology, the combination between the core is by the location of the anchor point between the core and uses adhesive bond, the location easily occurs inaccurate, bonding unstable phenomenon.Close-over is adopted in combination between sand lump and sand lump, and namely the version of convex-concave is simply located, and inconsistent phenomenon easily occurs.
Summary of the invention
Deficiency and defective for the prior art existence, the objective of the invention is provides a kind of fast method for the manufacturing of the heavy castings casting mold of single-piece, small lot, namely based on bank close structure without module dress formative method, be intended to improve manufacturing speed and the precision of heavy castings casting mold, prevent the sand lump dislocation, shorten the production cycle of foundry goods, save cost, realize heavy castings without the module process of assembling.
Technical scheme of the present invention is as follows:
A kind of based on bank close structure without module dress formative method, it is characterized in that, the method comprises the steps:
A) according to the casting mold characteristics, cad model is carried out the piecemeal design;
B) for the location characteristics of piecemeal sand lump, the concavo-convex bank of design piecemeal fitting surface closes structure and assembling mode;
C) the piecemeal sand lump is carried out virtual assembly, carry out the whole related three dimensional design of casting mold, group type, lower core process are carried out virtual assembly;
D) prepare processed sand lump, Superimposed fastener in sand lump;
E) carry out the processing that piecemeal sand lump shape and surperficial bank close structure;
F) the piecemeal sand lump is assembled, closed structure by the bank of processing between sand lump relatively fixing, and adopt as required the core bonding agent to connect;
G) pretightning force is fixed and applied in the periphery of whole sand mold, finishes the sand mold assembling.
Described bank closes structure and relates to multi-peaks structure, comprises the sawtooth forms such as rectangle, triangle, and the width of shape is 5-10mm, and the machining accuracy error that bank closes structure is ± 0.5mm.
The mode of pretightning force is fixed and applied in described periphery, can adopt flat board to compress in many aspects, and the thrust size utilizes the bolt that bolt is regulated or is embedded in the sand mold between plate to regulate, and also can provide pressure for flat board by the cylinder that adds.
Described piecemeal design, the CAD design of described casting mold is different from traditional casting Technology Design, as simplifying core, core and sand mold is designed as a whole; Die joint between the sand lump of piecemeal can be horizontal plane, vertical plane, cascaded surface or arc surface etc.
The present invention compared with prior art has the following advantages:
1) realizes the integrated of the Design of digital of casting mold and processing and manufacturing, improved the precision of casting mold.
2) in the method, casting mold is directly processed by Digit Control Machine Tool, has saved apperance manufacturing process, has shortened the production cycle of whole foundry goods, has improved production efficiency.A large amount of timber that apperance is made that are used for have been saved simultaneously.
3) compare with the conventional cast Process Planning, the casting mold piecemeal is more flexible, and machine-finish allowance is little, has saved large quantitative metal liquid.
Description of drawings
Below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated:
Fig. 1 is for being used for the chucking device of fixing assembling sand mold
Fig. 2 is that leg-of-mutton sawtooth bank closes structure
Fig. 3 is that rectangular-shaped bank closes structure
Fig. 4 is the schematic diagram of assembling sand mold
Reference numeral
1-peripheral fishbolt 2-surrounding lock jack panel 3-adjustable locating piece
The locking nut 5 of 4-locating piece-adjustment pressing plate 1-adjustment pressing plate two
The specific embodiment
According to the casting structure characteristics, carry out the design of the casting technique aspects such as running gate system, rising head, steam vent, chill, set up the cad model of casting mold, and according to the casting mold characteristics cad model is carried out the piecemeal design, determine the quantity of piecemeal sand lump and the form of piecemeal etc.Faying face between the piecemeal sand lump can be that horizontal direction also can be vertical direction.
For the location characteristics of piecemeal sand lump, whole sand mold is divided into 4 parts (such as Fig. 4), wherein, being connected between sand lump and the sand lump adopts concavo-convex bank to close version, such as the I among Fig. 4 and II enlarged drawing; All the other two joint faces adopt respectively the assembling form of inclined-plane and ladder.And the assembling of definite whole casting mold.
The piecemeal sand lump is carried out virtual assembly, carry out the whole related three dimensional design of casting mold, group type, lower core process are carried out virtual assembly.If in the virtual assembling, interference occurs, need to readjust piecemeal and the assembling mode of casting mold, repeatedly carry out again the CAE simulated experiment of casting technique, finally determine the structure of suitable casting mold macroblock mode and positioning form and casting mold, core.
According to the foundry goods characteristics, mixed monolithic sand lump processed also can Superimposed fastener in mixed process processed, as monolithic sand lump assembling use.
According to the design feature of piecemeal sand lump, for the simple sand mold of contour structure, adopt the dedicated numerical control cutting apparatus to process; The sand mold (core) that shape is complicated adopts the method for rapid prototyping to carry out the two combination of processing and manufacturing or its.
The piecemeal sand lump is carried out in the process of overall package, assemble according to the sand lump that original cad model piecemeal design processes, and close structure by the bank between fitting surface and relatively fix.Simultaneously, adopt chucking device to apply pretightning force shown in Fig. 4 direction of arrow in the whole sand mold periphery that combines, further prevent the relative changing of the relative positions between sand lump, finish the assembling of whole casting mold; According to the characteristics of assembling casting mold, can adopt binding agent that the local location of some cooperation or bank are closed face and carry out bonding.
Above description to the present invention and embodiment thereof is schematically, does not have restricted.So, if those of ordinary skill in the art is enlightened by it, in the situation that do not break away from the invention aim, carry out other embodiment, all should belong to protection scope of the present invention.
Claims (4)
- One kind based on bank close structure without module dress formative method, it is characterized in that, the method comprises the steps:A) according to the casting mold characteristics, cad model is carried out the piecemeal design;B) for the location characteristics of piecemeal sand lump, the concavo-convex bank of design piecemeal fitting surface closes structure and assembling mode;C) the piecemeal sand lump is carried out virtual assembly, carry out the whole related three dimensional design of casting mold, group type, lower core process are carried out virtual assembly;D) prepare processed sand lump, Superimposed fastener in sand lump;E) carry out the processing that piecemeal sand lump shape and surperficial bank close structure;F) the piecemeal sand lump is assembled, closed structure by the bank of processing between sand lump relatively fixing, and adopt as required the core bonding agent to connect;G) pretightning force is fixed and applied in the periphery of whole sand mold, finishes the sand mold assembling.
- According to claim 1 a kind of based on bank close structure without module dress formative method, it is characterized in that, described bank closes structure and relates to multi-peaks structure, comprises rectangle, leg-of-mutton sawtooth form, the width of shape is 5-10mm, and the machining accuracy error that bank closes structure is ± 0.5mm.
- 3. According to claim 1 a kind of based on bank close structure without module dress formative method, it is characterized in that, the mode of pretightning force is fixed and applied in described periphery, adopt flat board to compress in many aspects, the thrust size utilizes the bolt that bolt is regulated or is embedded in the sand mold between plate to regulate, and perhaps provides pressure by the cylinder that adds for flat board.
- 4. According to claim 1 a kind of based on bank close structure without module dress formative method, it is characterized in that, the die joint between the sand lump of piecemeal is horizontal plane, vertical plane, cascaded surface or arc surface.?
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101506027A CN102198487B (en) | 2010-04-20 | 2010-04-20 | Fitting-structure-based dieless assembly molding method |
| PCT/CN2011/072161 WO2011131074A1 (en) | 2010-04-20 | 2011-03-25 | Molding method for patternless casting assembly based on bumpy ridge structure |
| DE112011101382.5T DE112011101382B4 (en) | 2010-04-20 | 2011-03-25 | Molding process without a model for a split sand casting mold with an uneven rib structure to assemble |
| AU2011242313A AU2011242313B2 (en) | 2010-04-20 | 2011-03-25 | Molding method for patternless casting assembly based on bumpy ridge structure |
| ZA2012/08509A ZA201208509B (en) | 2010-04-20 | 2012-11-12 | Molding method for patternless casting assembly based on bumpy ridge structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101506027A CN102198487B (en) | 2010-04-20 | 2010-04-20 | Fitting-structure-based dieless assembly molding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102198487A CN102198487A (en) | 2011-09-28 |
| CN102198487B true CN102198487B (en) | 2013-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101506027A Active CN102198487B (en) | 2010-04-20 | 2010-04-20 | Fitting-structure-based dieless assembly molding method |
Country Status (5)
| Country | Link |
|---|---|
| CN (1) | CN102198487B (en) |
| AU (1) | AU2011242313B2 (en) |
| DE (1) | DE112011101382B4 (en) |
| WO (1) | WO2011131074A1 (en) |
| ZA (1) | ZA201208509B (en) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102198487B (en) | 2010-04-20 | 2013-01-09 | 机械科学研究总院先进制造技术研究中心 | Fitting-structure-based dieless assembly molding method |
| CN102773411B (en) * | 2012-08-20 | 2016-01-20 | 机械科学研究总院先进制造技术研究中心 | A kind of digitlization non-model sand mold extrusion forming method |
| CN103658520B (en) * | 2012-09-17 | 2016-12-21 | 机械科学研究总院先进制造技术研究中心 | A kind of metalwork casting mold subdivision method |
| CN102873272B (en) * | 2012-10-08 | 2015-01-21 | 机械科学研究总院先进制造技术研究中心 | Patternless sand mould numerical-control machining method by coating sand in iron mould |
| CN103157764A (en) * | 2013-04-12 | 2013-06-19 | 机械科学研究总院江苏分院 | Patternless casting digital partition machining method |
| CN104588581A (en) * | 2015-01-20 | 2015-05-06 | 江西弘旺汽车制动器制造有限公司 | Manufacturing method of brake drum |
| CN104801676B (en) * | 2015-03-03 | 2017-01-18 | 共享铸钢有限公司 | Combined sand mold structure convenient to fix and manufacturing method of combined sand mold |
| DE102015111418A1 (en) | 2015-07-14 | 2017-01-19 | Nemak, S.A.B. De C.V. | Method for producing a casting core and casting core |
| CN105108892A (en) * | 2015-09-21 | 2015-12-02 | 郑州远东耐火材料有限公司 | Manufacturing method for overall arch brick sand mold |
| CN105328121B (en) * | 2015-11-13 | 2017-05-24 | 顺德职业技术学院 | Die-free fast casting method based on fused deposition technology |
| CN105665636B (en) * | 2016-02-01 | 2017-12-01 | 唐山东方华盛优耐高科股份有限公司 | A kind of production technology of simple casting |
| CN105750496B (en) * | 2016-04-08 | 2018-01-12 | 宁夏共享模具有限公司 | A kind of method of modular manufacturing saddle sand mold |
| CN106001432B (en) * | 2016-07-18 | 2018-01-12 | 宁夏共享模具有限公司 | A kind of group core position detecting system of 3D printing core |
| CN107745083A (en) * | 2017-09-22 | 2018-03-02 | 芜湖市鸿坤汽车零部件有限公司 | A kind of Engine cylinder body sand core combination structure |
| CN107598096B (en) * | 2017-09-26 | 2020-02-11 | 常州中车汽车零部件有限公司 | Fastening sand mould frock and turbine shell casting system |
| CN110102711B (en) * | 2019-04-11 | 2020-12-25 | 兰州兰石集团有限公司铸锻分公司 | Method for manufacturing casting mould of steel casting forming process |
| CN112074358A (en) * | 2019-07-19 | 2020-12-11 | 苏州明志科技股份有限公司 | Sand core manufacturing device and manufacturing process |
| CN110576152A (en) * | 2019-09-20 | 2019-12-17 | 六丰金属科技（昆山）有限公司 | Aluminum alloy casting mould with fitting surface |
| CN117086264B (en) * | 2023-10-19 | 2023-12-19 | 中北大学 | Casting method combining frozen sand mold and gypsum mold |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1769723A (en) * | 2005-09-06 | 2006-05-10 | 清华大学 | Prestress fitting connection method |
| CN200981098Y (en) * | 2006-09-26 | 2007-11-28 | 河北科技大学 | Equal height splitting composite type casting module sample |
| CN101259526A (en) * | 2007-07-31 | 2008-09-10 | 机械科学研究总院先进制造技术研究中心 | Non die-casting type digitalization fast manufacturing method |
| CN101439390A (en) * | 2008-12-30 | 2009-05-27 | 机械科学研究总院先进制造技术研究中心 | Digitalization processing method of gypsum mould |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5584249A (en) * | 1978-12-16 | 1980-06-25 | Nippon Sanso Kk | Production of mold |
| JP3114159B2 (en) * | 1995-11-29 | 2000-12-04 | 株式会社荏原製作所 | Mold manufacturing method |
| DE19825448C2 (en) * | 1998-06-06 | 2000-07-13 | Actech Gmbh Adv Casting Tech | Method and device for the direct production of a lost casting mold for metal castings |
| US6286581B1 (en) * | 1999-07-28 | 2001-09-11 | Ronald Gustafson | Method for machining sand block into sand molding elements including sand molds and sand cores for metal casting foundry operations |
| CN100556579C (en) * | 2006-11-09 | 2009-11-04 | 南京蓝捷德科技有限公司 | Combined type casting mold and manufacture method thereof |
| CN101279357A (en) * | 2008-06-03 | 2008-10-08 | 机械科学研究总院先进制造技术研究中心 | Sand mold milling method based on industrial robot |
| CN102198487B (en) | 2010-04-20 | 2013-01-09 | 机械科学研究总院先进制造技术研究中心 | Fitting-structure-based dieless assembly molding method |
-
2010
- 2010-04-20 CN CN2010101506027A patent/CN102198487B/en active Active
-
2011
- 2011-03-25 AU AU2011242313A patent/AU2011242313B2/en active Active
- 2011-03-25 DE DE112011101382.5T patent/DE112011101382B4/en active Active
- 2011-03-25 WO PCT/CN2011/072161 patent/WO2011131074A1/en active Application Filing
-
2012
- 2012-11-12 ZA ZA2012/08509A patent/ZA201208509B/en unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1769723A (en) * | 2005-09-06 | 2006-05-10 | 清华大学 | Prestress fitting connection method |
| CN200981098Y (en) * | 2006-09-26 | 2007-11-28 | 河北科技大学 | Equal height splitting composite type casting module sample |
| CN101259526A (en) * | 2007-07-31 | 2008-09-10 | 机械科学研究总院先进制造技术研究中心 | Non die-casting type digitalization fast manufacturing method |
| CN101439390A (en) * | 2008-12-30 | 2009-05-27 | 机械科学研究总院先进制造技术研究中心 | Digitalization processing method of gypsum mould |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2011242313B2 (en) | 2013-08-08 |
| DE112011101382B4 (en) | 2021-02-04 |
| ZA201208509B (en) | 2013-09-25 |
| CN102198487A (en) | 2011-09-28 |
| DE112011101382T5 (en) | 2013-01-31 |
| WO2011131074A1 (en) | 2011-10-27 |
| AU2011242313A1 (en) | 2012-11-29 |
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