CN102198487A - Fitting-structure-based dieless assembly molding method - Google Patents

Fitting-structure-based dieless assembly molding method Download PDF

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Publication number
CN102198487A
CN102198487A CN2010101506027A CN201010150602A CN102198487A CN 102198487 A CN102198487 A CN 102198487A CN 2010101506027 A CN2010101506027 A CN 2010101506027A CN 201010150602 A CN201010150602 A CN 201010150602A CN 102198487 A CN102198487 A CN 102198487A
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China
Prior art keywords
sand
bank
piecemeal
mold
closes
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CN2010101506027A
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Chinese (zh)
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CN102198487B (en
Inventor
单忠德
刘丰
董晓丽
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机械科学研究总院先进制造技术研究中心
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Priority to CN2010101506027A priority Critical patent/CN102198487B/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/02Sand moulds or like moulds for shaped castings

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

A kind of no module dress formative method that closes structure based on bank

Technical field

The present invention relates to a kind of casting mold manufacturing process of large-scale sand-cast, belong to casting and numerical control cutting technical field.

Background technology

Make the important component part that had developed into national economy already, 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 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 manufacture 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, high-quality crucial foundry goods main dependence on import, particularly heavy castings production process complexity, quality requirement height.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 big; Foundry goods allowance is big, and raw materials consumption is many; The casting mold manufacturing process falls behind, and casting yield is low; Defectives such as shrinkage porosite, shrinkage cavity, crackle are many, the big problem of Repair Welding amount.The 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 wooden model cost height, 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 8 foundry goods (also once model repairing of centre) at most the service life of a cover wooden model.When only needing one of manufacturing or two foundry goods sometimes, 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.This 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 this method moulding efficient is low, floor space is big, is suitable for the manufacturing of foundry goods in enormous quantities, and molding sand quality is required height, and the fresh sand consumption is big, thereby causes its moulding cost higher, 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 that it is inaccurate to occur the location easily, bonding unstable phenomenon.Close-over is adopted in combination between sand lump and sand lump, and promptly the version of convex-concave is simply located, and occurs inconsistent phenomenon easily.

Summary of the invention

Deficiency and defective at the prior art existence, the objective of the invention is provides a kind of method fast for the manufacturing of the heavy castings casting mold of single-piece, small lot, promptly close the no module dress formative method of structure based on bank, be intended to improve the 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 the no module process of assembling of heavy castings.

Technical scheme of the present invention is as follows:

A kind ofly close the no module dress formative method of structure, it is characterized in that this method comprises the steps: based on bank

A), cad model is carried out the piecemeal design according to the casting mold characteristics;

B) at the location characteristics of piecemeal sand lump, the concavo-convex bank of design piecemeal fitting surface closes structure and assembling mode;

C) prepare processed sand lump, can be in sand lump pre-buried securing member;

D) carry out the processing that piecemeal sand lump shape and surperficial bank close structure;

E) the piecemeal sand lump is assembled, the bank by processing between sand lump closes the structure relative fixed, and can adopt the core bonding agent to connect as required;

F) 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 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 is characterized in that, 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.Saved simultaneously and be used for the timber that apperance is made in a large number.

3) compare with conventional cast technological design process, 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 used for fixing the chucking device of assembling sand mold

Fig. 2 closes structure for leg-of-mutton sawtooth bank

Fig. 3 closes structure for rectangular-shaped bank

Fig. 4 is the schematic diagram of assembling sand mold

Reference numeral

The adjustable locating piece of the peripheral fishbolt 2-surrounding lock jack panel 3-of 1-

The locking nut 5-of 4-locating piece adjusts pressing plate one 6-and adjusts pressing plate two

The specific embodiment

According to the casting structure characteristics, carry out the design of casting technique aspects such as running gate system, rising head, steam vent, chill, set up the cad model of casting mold, and cad model is carried out the piecemeal design according to the casting mold characteristics, 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 a vertical direction.

At the location characteristics of piecemeal sand lump, whole sand mold is divided into 4 parts (as Fig. 4), wherein, being connected between sand lump and the sand lump adopts concavo-convex bank to close version, as I among Fig. 4 and II enlarged drawing; All the other two joint faces adopt the assembling form of inclined-plane and ladder respectively.And the assembling of definite whole casting mold.

The piecemeal sand lump is carried out virtual assembling, carry out the whole related three dimensional design of casting mold, group type, following core process are carried out virtual assembling.If in the virtual assembling, interference occurs, need readjust the piecemeal and the assembling mode of casting mold, carry out the CAE simulated experiment of casting technique more repeatedly, determine that finally suitable casting mold divides the structure of block mode and positioning form and casting mold, core.

According to the foundry goods characteristics, mix system monolithic sand lump and can pre-buried securing member in mixed system process, as monolithic sand lump assembling use.

According to the design feature of piecemeal sand lump,, adopt the dedicated numerical control cutting apparatus to process for the simple sand mold of contour structure; 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, the sand lump assembling that design processes according to original C AD model piecemeal, and close structure by the bank between fitting surface and carry out relative fixed.Simultaneously, adopt chucking device to apply pretightning force shown in Fig. 4 direction of arrow, further prevent the relative changing of the relative positions between sand lump, finish the assembling of whole casting mold in the whole sand mold periphery that combines; 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.

More than be schematically to the description of the present invention and embodiment thereof, do not have restricted.So, if those of ordinary skill in the art is enlightened by it, under the situation that does not break away from the invention aim, carry out other embodiment, all should belong to protection scope of the present invention.

Claims (4)

1. one kind is closed the no module dress formative method of structure based on bank, it is characterized in that this method comprises the steps:
A), cad model is carried out the piecemeal design according to the casting mold characteristics;
B) at the location characteristics of piecemeal sand lump, the concavo-convex bank of design piecemeal fitting surface closes structure and assembling mode;
C) prepare processed sand lump, can be in sand lump pre-buried securing member;
D) carry out the processing that piecemeal sand lump shape and surperficial bank close structure;
E) the piecemeal sand lump is assembled, the bank by processing between sand lump closes the structure relative fixed, and can adopt the core bonding agent to connect as required;
F) pretightning force is fixed and applied in the periphery of whole sand mold, finishes the sand mold assembling.
2. a kind of no module dress formative method that closes structure based on bank according to claim 1, it is characterized in that described bank closes structure and relates to multi-peaks structure, comprises sawtooth forms such as rectangle, triangle, the width of shape is 5-10mm, and the machining accuracy error that bank closes structure is ± 0.5mm.
3. a kind of no module dress formative method that closes structure based on bank according to claim 1, it is characterized in that, the mode of pretightning force is fixed and applied in described periphery, can 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 also can provide pressure for flat board by the cylinder that adds.
4. according to claim 1ly a kind ofly close the no module dress formative method of structure, it is characterized in that described piecemeal design based on bank, it is characterized in that, 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.
CN2010101506027A 2010-04-20 2010-04-20 Fitting-structure-based dieless assembly molding method CN102198487B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (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
AU2011242313A AU2011242313B2 (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
ZA2012/08509A ZA201208509B (en) 2010-04-20 2012-11-12 Molding method for patternless casting assembly based on bumpy ridge structure

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CN102198487A true CN102198487A (en) 2011-09-28
CN102198487B CN102198487B (en) 2013-01-09

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WO (1) WO2011131074A1 (en)
ZA (1) ZA201208509B (en)

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CN102773411A (en) * 2012-08-20 2012-11-14 机械科学研究总院先进制造技术研究中心 Digital die-free sand mould extrusion forming method
CN102873272A (en) * 2012-10-08 2013-01-16 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
DE112011101382T5 (en) 2010-04-20 2013-01-31 Advanced Manufacture Technology Center China Academy Of Machinery Science & Technology A molding method for assembling cast pieces without a model based on an uneven rib structure
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
CN103658520A (en) * 2012-09-17 2014-03-26 机械科学研究总院先进制造技术研究中心 Metal part casting mold splitting 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
CN104801676A (en) * 2015-03-03 2015-07-29 共享铸钢有限公司 Combined sand mold structure convenient to fix and manufacturing method of combined sand mold
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
CN105328121A (en) * 2015-11-13 2016-02-17 顺德职业技术学院 Die-free fast casting method based on fused deposition technology
CN105665636A (en) * 2016-02-01 2016-06-15 唐山东方华盛优耐高科股份有限公司 Single casting production technology
CN105750496A (en) * 2016-04-08 2016-07-13 宁夏共享模具有限公司 Method for modularizing saddle sand mold
CN106001432A (en) * 2016-07-18 2016-10-12 宁夏共享模具有限公司 Core assembly positioning detection system of 3D printing sand cores
CN107598096A (en) * 2017-09-26 2018-01-19 常州中车汽车零部件有限公司 Fasten sand mold frock and turbine case casting system
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
CN110102711A (en) * 2019-04-11 2019-08-09 兰州兰石集团有限公司铸锻分公司 The manufacturing method of steel-casting moulding process casting mold
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
WO2021012103A1 (en) * 2019-07-19 2021-01-28 苏州明志科技股份有限公司 Sand core manufacturing device and manufacturing process

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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
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DE112011101382T5 (en) 2010-04-20 2013-01-31 Advanced Manufacture Technology Center China Academy Of Machinery Science & Technology A molding method for assembling cast pieces without a model based on an uneven rib structure
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
CN102773411A (en) * 2012-08-20 2012-11-14 机械科学研究总院先进制造技术研究中心 Digital die-free sand mould 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
CN103658520A (en) * 2012-09-17 2014-03-26 机械科学研究总院先进制造技术研究中心 Metal part casting mold splitting 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
CN102873272A (en) * 2012-10-08 2013-01-16 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
CN104801676A (en) * 2015-03-03 2015-07-29 共享铸钢有限公司 Combined sand mold structure convenient to fix and manufacturing method of combined sand mold
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
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
CN105328121A (en) * 2015-11-13 2016-02-17 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
CN105665636A (en) * 2016-02-01 2016-06-15 唐山东方华盛优耐高科股份有限公司 Single casting production technology
CN105750496A (en) * 2016-04-08 2016-07-13 宁夏共享模具有限公司 Method for modularizing saddle sand mold
CN106001432A (en) * 2016-07-18 2016-10-12 宁夏共享模具有限公司 Core assembly positioning detection system of 3D printing sand cores
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
CN107598096A (en) * 2017-09-26 2018-01-19 常州中车汽车零部件有限公司 Fasten sand mold frock and turbine case casting system
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
CN110102711A (en) * 2019-04-11 2019-08-09 兰州兰石集团有限公司铸锻分公司 The manufacturing method of steel-casting moulding process casting mold
WO2021012103A1 (en) * 2019-07-19 2021-01-28 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

Also Published As

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ZA201208509B (en) 2013-09-25
DE112011101382B4 (en) 2021-02-04
AU2011242313B2 (en) 2013-08-08
WO2011131074A1 (en) 2011-10-27
DE112011101382T5 (en) 2013-01-31
AU2011242313A1 (en) 2012-11-29
CN102198487B (en) 2013-01-09

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