CN104057024B - A kind of combined shaping manufacture method of metalwork - Google Patents

A kind of combined shaping manufacture method of metalwork Download PDF

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Publication number
CN104057024B
CN104057024B CN201410207626.XA CN201410207626A CN104057024B CN 104057024 B CN104057024 B CN 104057024B CN 201410207626 A CN201410207626 A CN 201410207626A CN 104057024 B CN104057024 B CN 104057024B
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China
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casting mold
casting
sand
mold
block
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CN201410207626.XA
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Chinese (zh)
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CN104057024A (en
Inventor
单忠德
张志权
刘丰
战丽
王祥磊
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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 CN201410207626.XA priority Critical patent/CN104057024B/en
Publication of CN104057024A publication Critical patent/CN104057024A/en
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Abstract

The inventive method discloses the combined shaping manufacture method of a kind of metalwork, belongs to lost foam casting, sand shaped cast makes the interleaving techniques field with digital control processing.First the present invention carries out particular analysis to cast model, casting mold is divided into different piece, then sand mo(u)ld and the different piece of evaporative pattern making casting mold it are utilized respectively, finally it is assembled into composite mould, it gives full play to sand casting and the respective advantage of lost foam casting, on the basis of ensureing casting accuracy and surface quality, the two being combined neatly, quick Fabrication goes out high accuracy labyrinth metal casting.

Description

A kind of combined shaping manufacture method of metalwork
Technical field
The present invention relates to the casting preparation method of a kind of metallic element, particularly to a kind of method of combined shaping quick Fabrication casting mold, belong to the interleaving techniques field of sand casting, lost foam casting and numerical control cutting.
Background technology
Non-model sand mold casting technique spans many obstacles of conventional casting techniques, there is precise treatment and flexibility feature, can directly process complexity, accurate structure, but owing to molding sand is mixed by sand grains, curing agent etc., surface quality after molding sand cutting is mainly determined by sand grains diameter, therefore surface quality of continuous castings is poor, and when making the casting mold of large piece, labour intensity is big.
Lost foam casting can realize the casting of the part complicated containing internal cavity and contour structures, surface quality is high, but owing to foam stiffness is little, oppressing because of the impact of jolt ramming loose sand momentum and weight in modeling process, casting mold is yielding, particularly thin-wall part or the marginal portion of complex structural member.
At present, complex precise foundry goods gets more and more in the application of the aspect such as space flight and aviation, vehicle motor, Production requirement is urgent, it is badly in need of researching and developing the cast form process technology of a kind of fast and low-cost, to solve the existing defective workmanship grinding mold casting and lost foam casting, and then obtain high-quality complex precise foundry goods.
Summary of the invention
A kind of method that it is an object of the invention to provide quick manufacture precision casting mold, particularly large-scale precision casting mold.The method comprehensive utilization non-model sand mold casting and lost foam casting process, improve making qualification rate and casting accuracy, the surface quality of casting mold, meet the demand of client's high-accuracy foundry goods the most large-scale to high-accuracy foundry goods.
The metalwork combined shaping manufacture method that the present invention provides, step is as follows:
1. according to finished machine, the threedimensional model of structure foundry goods, determine the precision of each geometric properties of foundry goods, and establish the face of key, hole, size;
2. block model and casting mold select;According to the analysis of the first step, by block model, select casting mold principle as follows for every piece
A. required precision is high, including closing keyboard, hole, the block of size, uses sand mold to do casting mold,
B. the block having internal cavity structure or big abundant body uses evaporative pattern to do casting mold,
When dividing casting mold, improve sand mo(u)ld and evaporative pattern fiting effect as far as possible, time as bigger in evaporative pattern outer surface, cooperating therewith sand mo(u)ld Substitute For Partial loose sand (sand mo(u)ld as box in opening) can be used, so can reduce during jolt ramming, lost pattern is impacted and the squeezing action superposition to lost pattern of the weight own by loose sand motion momentum, causes lost pattern to produce Dish deformation internally, thus foundry goods also has identical Dish deformation;
During evaporative pattern internal cavity space structure complexity, sand mo(u)ld can be used to do corresponding matching core, solve loose sand fill less than, or fill unreal, the protruding deformation that during cast, foundry goods expands outwardly;
C. without a, other block of feature in b, casting mold can be selected according to technique convenience;
3. piecemeal casting mold makes;After the 2nd step divides, build the threedimensional model of casting mold, process each casting mold
A. sand mold can be obtained by sand lump is processed, it is possible to is obtained by metal casting overmolded,
B. evaporative pattern is obtained by foam-plastic blocks processing, it is possible to obtained by foaming machine foaming,
Before processing each point of casting mold, the location of each piecemeal casting mold, assembling supplementary structure are designed, and casting mold is together processed;
4. arrange and detect each piecemeal casting mold;
5. group type, obtains required casting mold, i.e. composite mould;
6. coating, back-up sand, jolt ramming, cast, the demoulding, obtain foundry goods.
Accompanying drawing explanation
Fig. 1 is part prose drawing.
Fig. 2 is piecemeal casting mold schematic diagram, and in Fig. 2, a is loose sand, and b is casting mold inner chamber, and c is evaporative pattern casting mold, and d is to be processed, by molding sand, the peripheral casting mold obtained.
Fig. 3 is process chart 。
Detailed description of the invention
Below by an embodiment, the present invention is described in detail, but not as a limitation of the invention.
1., according to art work sheet, if the axiality of Fig. 1, boss outer surface A Yu the vertical inner surface B of band hook blind hole channel inner chamber is the preferential precision ensured, and boss outer surface A is for closing keyboard.
2. according to the analysis in detailed description of the invention 1, by block model:
A. band hook blind hole channel is the structure containing internal cavity, selects sand mo(u)ld to make model;For ensureing axiality and the precision of boss outer surface A, boss periphery uses sand mo(u)ld to do casting mold;
B. remaining all uses evaporative pattern to do casting mold.
3. piecemeal casting mold makes.Concrete outcome such as Fig. 2:
Wherein a is loose sand;
B is casting mold inner chamber, can by forming machine processing sand lump obtain, can five axle forming machines once-forming, it is possible to again piecemeal so that three axle forming machines processing;
C is evaporative pattern casting mold, drawing know, this model 120 symmetrized in turn, therefore model is divided into three pieces of symmetry, and the anchor point that assembles of three pieces may be designed to the easy structure that convex-concave post holes coordinates, quantity more than 2, is repeated in processing and obtains three block casting types;
D is the peripheral casting mold processed by molding sand, though structure is relatively big, but very simple, it is easily worked;
The structure of b, c, d is for automatically assembling location, therefore need not again design this structure.
4. arrange and detect each piecemeal casting mold, if processing correctly occurs without disrepair phenomenon such as process, and casting mold is intact.Re-work if you have questions, qualified after carry out next step.
5. b, c, d group type.
6. evaporative pattern top coat, then loose sand is covered in evaporative pattern apperance, jolt ramming, cast, the demoulding, obtain foundry goods.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.

Claims (2)

1. the combined shaping manufacture method of a metalwork, it is characterised in that:
Comprise the following steps:
A. according to finished machine, structure foundry goods and the threedimensional model of casting mold, determine the precision of each geometric properties of foundry goods, and establish the face of key, hole, size;
B. block model and casting mold select, according to the analysis of step a, according to casting mold selection principle by block model;
C. piecemeal casting mold makes, and after step b divides, each sectional pattern is processed casting mold;
D. arrange and detect each piecemeal casting mold;
E. group type, obtains required casting mold, i.e. composite mould;
F. coating, back-up sand, jolt ramming, cast, the demoulding, obtain foundry goods;
Wherein, casting mold selection principle is:
a1. required precision is high, including closing keyboard, hole, the block of size, uses sand mold to do casting mold;
b1. there is the block of internal cavity structure or big abundant body to use evaporative pattern to do casting mold;
c1. without a1、b1Other block of middle feature, can select casting mold according to technique convenience.
The combined shaping manufacture method of a kind of metalwork the most according to claim 1, it is characterised in that each piecemeal casting mold adds man-hour:
a2. sand mold can be obtained by sand lump is processed, it is possible to is obtained by metal casting overmolded;
b2. evaporative pattern is obtained by foam-plastic blocks processing, it is possible to obtained by foaming machine foaming;
Before processing each point of casting mold, the location of each piecemeal casting mold, assembling supplementary structure are designed, and casting mold is together processed.
CN201410207626.XA 2014-05-16 2014-05-16 A kind of combined shaping manufacture method of metalwork CN104057024B (en)

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Publication number Priority date Publication date Assignee Title
CN104368763B (en) * 2014-10-17 2016-09-21 山东浩信机械有限公司 The casting technique of ring muscle brake drum
CN104707937B (en) * 2015-02-13 2017-01-11 广东峰华卓立科技股份有限公司 Method for preparing sand mold by using reverse mold and sand mold preparation method

Citations (4)

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Publication number Priority date Publication date Assignee Title
CN102218505A (en) * 2011-07-08 2011-10-19 嘉禾县众合铸业有限公司 Precise casting technology for green sand vacuum sealing model
CN102451882A (en) * 2011-02-24 2012-05-16 机械科学研究总院先进制造技术研究中心 Rapid composite precision manufacturing method for a metal part
CN103600028A (en) * 2012-12-31 2014-02-26 机械科学研究总院先进制造技术研究中心 Sand mold composite molding 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

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002066723A (en) * 2000-08-29 2002-03-05 Toyoda Mach Works Ltd Casting of wear resistant compound material and manufacturing method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102451882A (en) * 2011-02-24 2012-05-16 机械科学研究总院先进制造技术研究中心 Rapid composite precision manufacturing method for a metal part
CN102218505A (en) * 2011-07-08 2011-10-19 嘉禾县众合铸业有限公司 Precise casting technology for green sand vacuum sealing model
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
CN103600028A (en) * 2012-12-31 2014-02-26 机械科学研究总院先进制造技术研究中心 Sand mold composite molding method

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