CN101700568A - Low pressure casting method for lattice sandwich plate - Google Patents
Low pressure casting method for lattice sandwich plate Download PDFInfo
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- CN101700568A CN101700568A CN200910309848A CN200910309848A CN101700568A CN 101700568 A CN101700568 A CN 101700568A CN 200910309848 A CN200910309848 A CN 200910309848A CN 200910309848 A CN200910309848 A CN 200910309848A CN 101700568 A CN101700568 A CN 101700568A
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Abstract
The invention discloses a low pressure casting method for a lattice sandwich plate and relates to a method for manufacturing the lattice sandwich plate. The invention solves the problems, such as difficult complete formation and high defect rate of the lattice sandwich plate resulted from the current manufacturing methods. The method according to the invention comprises the steps: producing a wax pattern, pasting and drying the surface, the adjacent surface and the back of the wax pattern; heating and demoulding the wax pattern to obtain the profile shell of the lattice sandwich plate; and in the end, obtaining the lattice sandwich plate by lifting, filling and pressure maintaining with a low pressure casting machine. The method combines investment pattern precision casing technique, rapid prototyping manufacturing technique with low pressure casing technique so as to result in the lattice sandwich plate with complete formation and low defect rate.
Description
Technical field
The present invention relates to a kind of preparation method of dot-matrix sandwich panel.
Background technology
In recent years, along with the develop rapidly of Aero-Space cause, use the quality and the aspect of performance of material to propose more and more higher requirement to it.At present, lightweight structural materials such as cellular sandwich material, foamed material and porosu solid obtain common attention and favor owing to have comprehensive function such as lightweight, high specific strength, high specific stiffness, impact resistance in the aerospace flight vehicle design, but the bearing structure purposes of open celled foam metal material is subjected to the restriction of its elastic modelling quantity and intensity simultaneously, its intensity and density are the index law relation, this makes it be inferior to cellular material with density greatly, and the structure of cellular material is difficult to realize its multifunction.Comprehensive above both advantage, truss core structure are considered to the superpower tough structure of novel advanced lightweight of current in the world tool prospect with its its specific structure characteristics.
Because the labyrinth of truss core structural material causes complete difficult forming in preparation process, the ratio of defects height of the truss core structural material that obtains.
Summary of the invention
The objective of the invention is to the invention provides a kind of low-pressure casting method of dot-matrix sandwich panel in order to solve the complete difficult forming of dot-matrix sandwich panel that has the preparation method now and obtain, the problem that ratio of defects is high.
The low-pressure casting method of a kind of dot-matrix sandwich panel of the present invention is realized by following steps: one, adopt the fusion sediment rapid forming equipment to prepare the wax-pattern of dot-matrix sandwich panel; Two, evenly smear ceramic size at the surface layer of wax-pattern, behind 18～22 ℃ of down dry 20～24h, evenly spread one deck titanium dioxide zircon sand then, on the proximal surface layer of wax-pattern, evenly smear ceramic size again, then at 18～22 ℃ of down dry 20～24h, evenly spread one deck titanium dioxide zircon sand again, the ceramic size that surface layer is smeared is to be that 4.5: 1 ratio is evenly mixed and being obtained by zirconium dioxide and Ludox in mass ratio, and the ceramic size that the proximal surface layer is smeared is to be 4.0: 1 ratio even mix obtaining with Ludox in mass ratio by zirconium dioxide; Three, evenly smear ceramic size at the backing layer of wax-pattern, at 18～22 ℃ of down dry 3～8h, evenly spread the layer of aluminum alumina particle more then, described ceramic size is to be 2.6～3.0: 1 obtain even mixing of ratio by bauxite and Ludox in mass ratio; Four, being coated with of backing layer repeating step three of wax-pattern hung operation 5～7 times; Five, will be placed on through the wax-pattern that above-mentioned steps four obtains in 200～250 ℃ the drying oven and be incubated 1～1.5h, dewax, be incubated 1～2h after then temperature being increased to 900～1000 ℃, obtain the dot-matrix sandwich panel shell with the stove cooling again; Six, behind the aluminum alloy melting with stalk, dot-matrix sandwich panel shell and low differential pressure stove are fixed and are kept sealing, set the cast parameter of air injection machine then: rising hydraulic coupling is 10～15mbar/s, mold filling pressure is 15mbar/s, boost pressure is 20mbar/s, dwell pressure is 400mbar, dwell time is 120s, carry out rising liquid, fill type, pressurize gets dot-matrix sandwich panel, wherein, the temperature of aluminium alloy melt is at 740～750 ℃, the stalk temperature is at 750～760 ℃, and the dot-matrix sandwich panel shell carries out preheating at 250～260 ℃ of insulation 0.5～1h before fixing with low differential pressure stove.
The present invention combines melted module precise casting technology, rapid shaping manufacturing with low pressure casting, 3D-Kagome lattice core and panel global formation have been realized, improve the bond strength of panel and core body greatly, and can realize the manufacturing of complexity, curve form 3D-Kagome dot matrix cored structure plate.
Method of the present invention obtains that the truss core sheet metal forming is complete, and ratio of defects is low, and integral casting forming is good.
Description of drawings
Fig. 1 is the specific embodiment one a step 6 mesolow casting and pouring curve map; Fig. 2 is dot-matrix sandwich panel that the specific embodiment 20 the obtains picture when not removing running gate system; Fig. 3 is the picture of the perfect lattice battenboard that obtains of the specific embodiment 20.
The specific embodiment
Technical solution of the present invention is not limited to the following cited specific embodiment, also comprises any combination between each specific embodiment.
The specific embodiment one: the low-pressure casting method of present embodiment dot-matrix sandwich panel is realized by following steps: one, adopt the fusion sediment rapid forming equipment to prepare the wax-pattern of dot-matrix sandwich panel; Two, evenly smear ceramic size at the surface layer of wax-pattern, behind 18～22 ℃ of down dry 20～24h, evenly spread one deck titanium dioxide zircon sand then, on the proximal surface layer of wax-pattern, evenly smear ceramic size again, then at 18～22 ℃ of down dry 20～24h, evenly spread one deck titanium dioxide zircon sand again, the ceramic size that surface layer is smeared is to be that 4.5: 1 ratio is evenly mixed and being obtained by zirconium dioxide and Ludox in mass ratio, and the ceramic size that the proximal surface layer is smeared is to be 4.0: 1 ratio even mix obtaining with Ludox in mass ratio by zirconium dioxide; Three, evenly smear ceramic size at the backing layer of wax-pattern, at 18～22 ℃ of down dry 3～8h, evenly spread the layer of aluminum alumina particle more then, described ceramic size is to be 2.6～3.0: 1 obtain even mixing of ratio by bauxite and Ludox in mass ratio; Four, being coated with of backing layer repeating step three of wax-pattern hung operation 5～7 times; Five, will be placed on through the wax-pattern that above-mentioned steps four obtains in 200～250 ℃ the drying oven and be incubated 1～1.5h, dewax, be incubated 1～2h after then temperature being increased to 900～1000 ℃, obtain the dot-matrix sandwich panel shell with the stove cooling again; Six, behind the aluminum alloy melting with stalk, dot-matrix sandwich panel shell and low differential pressure stove are fixed and are kept sealing, set the cast parameter of air injection machine then: rising hydraulic coupling is 10～15mbar/s, mold filling pressure is 15mbar/s, boost pressure is 20mbar/s, dwell pressure is 400mbar, dwell time is 120s, carry out rising liquid, fill type, pressurize gets dot-matrix sandwich panel, wherein, the temperature of aluminium alloy melt is at 740～750 ℃, the stalk temperature is at 750～760 ℃, and the dot-matrix sandwich panel shell carries out preheating at 250～260 ℃ of insulation 0.5～1h before fixing with low differential pressure stove.
It is complete that present embodiment obtains the truss core sheet metal forming, and ratio of defects is low.
Present embodiment step 6 mesolow casting and pouring curve as shown in fig. 1.
The specific embodiment two: present embodiment and the specific embodiment one are different is that the model of fusion sediment rapid forming equipment in the step 1 is FDM3000.Other step and parameter are identical with the specific embodiment one.
The specific embodiment three: what present embodiment was different with the specific embodiment one or two is that the surface layer at wax-pattern is evenly smeared ceramic size in the step 2, evenly spreads one deck titanium dioxide zircon sand behind the dry 22h down at 20 ℃ then.Other step and parameter are identical with the specific embodiment one or two.
The specific embodiment four: what present embodiment and the specific embodiment one, two or three were different is evenly to smear ceramic size again on the proximal surface layer of wax-pattern in the step 2, then at 20 ℃ of dry 22h down.Other step and parameter are identical with the specific embodiment one, two or three.
The specific embodiment five: present embodiment and the specific embodiment one to four are different is that the granularity of zirconium dioxide in the ceramic size that surface layer and proximal surface layer are smeared in the step 2 is 325 orders.Other step and parameter are identical with the specific embodiment one to four.
The specific embodiment six: present embodiment and the specific embodiment one to five are different is that the granularity of the titanium dioxide zircon sand that surface layer and proximal surface layer spread in the step 2 is 80～120 orders.Other step and parameter are identical with the specific embodiment one to five.
The specific embodiment seven: present embodiment and the specific embodiment one to five are different is that the granularity of the titanium dioxide zircon sand that surface layer and proximal surface layer spread in the step 2 is 100 orders.Other step and parameter are identical with the specific embodiment one to five.
The specific embodiment eight: what present embodiment and the specific embodiment one to seven were different is that the backing layer at wax-pattern is evenly smeared ceramic size in the step 3, then at 20 ℃ of dry 5h down.Other step and parameter are identical with the specific embodiment one to seven.
The specific embodiment nine: present embodiment and the specific embodiment one to eight are different is that the granularity of the bauxite in the ceramic size in the step 3 is 325 orders.Other step and parameter are identical with the specific embodiment one to eight.
The specific embodiment ten: present embodiment and the specific embodiment one to nine are different is that the granularity of the bauxite particle that backing layer spreads in the step 3 is 20～60 orders.Other step and parameter are identical with the specific embodiment one to nine.
The granularity of the bauxite particle that in the present embodiment the different numbers of plies of wax-pattern backing layer is spread reduces with the increase of the backing layer number of plies.
The specific embodiment 11: what present embodiment and the specific embodiment one to ten were different is that being coated with of backing layer repeating step three to wax-pattern hung operation 6 times in the step 4.Other step and parameter are identical with the specific embodiment one to ten.
The specific embodiment 12: present embodiment and the specific embodiment one to 11 are different is will be placed on through the wax-pattern that above-mentioned steps four obtains in the step 5 in 220～240 ℃ the drying oven to be incubated 1.2～1.4h.Other step and parameter are identical with the specific embodiment one to 11.
The specific embodiment 13: present embodiment and the specific embodiment one to 11 are different is will be placed on through the wax-pattern that above-mentioned steps four obtains in the step 5 in 230 ℃ the drying oven to be incubated 1.3h.Other step and parameter are identical with the specific embodiment one to 11.
The specific embodiment 14: what present embodiment and the specific embodiment one to 13 were different is to be incubated 1.2～1.8h after then temperature being increased to 920～980 ℃ in the step 5.Other step and parameter are identical with the specific embodiment one to 13.
The specific embodiment 15: what present embodiment and the specific embodiment one to 13 were different is to be incubated 1.5h after then temperature being increased to 950 ℃ in the step 5.Other step and parameter are identical with the specific embodiment one to 13.
The specific embodiment 16: what present embodiment and the specific embodiment one to 15 were different is that aluminium alloy is that Al-7Si alloy, Al-12Si alloy or other step of Al-5Cu alloy and parameter are identical with the specific embodiment one to 15 in the step 6.
The specific embodiment 17: present embodiment and the specific embodiment one to 16 are different be the temperature of aluminium alloy melt in the step 6 at 745 ℃, the stalk temperature is at 755 ℃.Other step and parameter are identical with the specific embodiment one to 16.
The specific embodiment 18: present embodiment and the specific embodiment one to 17 are different is that the dot-matrix sandwich panel shell is incubated 0.6～0.9h at 252～258 ℃ and carries out preheating in the step 6 before fixing with low differential pressure stove.Other step and parameter are identical with the specific embodiment one to 17.
The specific embodiment 19: present embodiment and the specific embodiment one to 17 are different is that the dot-matrix sandwich panel shell is incubated 0.8h at 255 ℃ and carries out preheating in the step 6 before fixing with low differential pressure stove.Other step and parameter are identical with the specific embodiment one to 17.
The specific embodiment 20: the low-pressure casting method of present embodiment dot-matrix sandwich panel is realized by following steps: one, adopt FDM3000 fusion sediment rapid forming equipment to prepare the dot-matrix sandwich panel wax-pattern; Two, evenly smear ceramic size at the surface layer of wax-pattern, evenly spread one deck titanium dioxide zircon sand behind the dry 24h down at 20 ℃ then, on the proximal surface layer of wax-pattern, evenly smear ceramic size again, then at 20 ℃ of following dry 24h, evenly spread one deck titanium dioxide zircon sand again, the ceramic size that surface layer is smeared is to be that 4.5: 1 ratio is evenly mixed and being obtained by zirconium dioxide and Ludox in mass ratio, and the ceramic size that the proximal surface layer is smeared is to be 4.0: 1 ratio even mix obtaining with Ludox in mass ratio by zirconium dioxide; Three, evenly smear ceramic size at the backing layer of wax-pattern, at 20 ℃ of following dry 5h, evenly spread the layer of aluminum alumina particle more then, described ceramic size is to be 2.6～3.0: 1 obtain even mixing of ratio by bauxite and Ludox in mass ratio; Four, being coated with of backing layer repeating step three of wax-pattern hung operation 6 times; Five, will be placed on through the wax-pattern that above-mentioned steps four obtains in 200 ℃ the drying oven and be incubated 1.5h, dewax, be incubated 1.5h after then temperature being increased to 950 ℃, obtain the dot-matrix sandwich panel shell with the stove cooling again; Six, behind the Al-7Si alloy melting stalk, dot-matrix sandwich panel shell and low differential pressure stove fixed and keep sealing, set the cast parameter of air injection machine then: rise hydraulic coupling 15mbar/s, mold filling pressure 15mbar/s, boost pressure 20mbar/s, dwell pressure 400mbar, dwell time 120s, carry out rising liquid, fill type, pressurize gets dot-matrix sandwich panel, wherein, the temperature of aluminium alloy melt is at 745 ℃, the stalk temperature is at 760 ℃, and the dot-matrix sandwich panel shell carries out preheating at 260 ℃ of insulation 0.8h before fixing with low differential pressure stove.
The granularity of zirconium dioxide is 325 orders in the ceramic size that surface layer and proximal surface layer are smeared in the present embodiment step 2, and the granularity of the titanium dioxide zircon sand that surface layer and proximal surface layer spread is 100 orders.The granularity of bauxite is 325 orders in the ceramic size that backing layer is smeared in step 3 and the step 4, and the granularity of the ratio of bauxite and Ludox and the bauxite that spreads is as shown in table 1 in the ceramic size that the different numbers of plies are smeared.
Table 1 is the granularity of the mass ratio (powder liquid mass ratio) of bauxite and Ludox in the ceramic size that the different backing layer numbers of plies are smeared in the present embodiment step 4 and the bauxite that spreads.
Table 1
| The number of plies | Powder liquid mass ratio | The bauxite granularity |
| ??1 | ??3.0∶1 | 60 orders |
| ??2 | ??3.0∶1 | 60 orders |
| ??3 | ??2.8∶1 | 40 orders |
| ??4 | ??2.8∶1 | 40 orders |
| ??5 | ??2.6∶1 | 20 orders |
| ??6 | ??2.6∶1 | 20 orders |
The dot-matrix sandwich panel that present embodiment obtains is complete, and ratio of defects is low.The dot-matrix sandwich panel of not removing running gate system as shown in Figure 2, complete dot-matrix sandwich panel is as shown in Figure 3.By Fig. 2 and shown in Figure 3, the dot-matrix sandwich panel that obtains is perfect, and ratio of defects is low.
Claims (10)
1. the low-pressure casting method of a dot-matrix sandwich panel is characterized in that the low-pressure casting method of dot-matrix sandwich panel is realized by following steps: one, adopt the fusion sediment rapid forming equipment to prepare the wax-pattern of dot-matrix sandwich panel; Two, evenly smear ceramic size at the surface layer of wax-pattern, behind 18～22 ℃ of down dry 20～24h, evenly spread one deck titanium dioxide zircon sand then, on the proximal surface layer of wax-pattern, evenly smear ceramic size again, then at 18～22 ℃ of down dry 20～24h, evenly spread one deck titanium dioxide zircon sand again, the ceramic size that surface layer is smeared is to be that 4.5: 1 ratio is evenly mixed and being obtained by zirconium dioxide and Ludox in mass ratio, and the ceramic size that the proximal surface layer is smeared is to be 4.0: 1 ratio even mix obtaining with Ludox in mass ratio by zirconium dioxide; Three, evenly smear ceramic size at the backing layer of wax-pattern, at 18～22 ℃ of down dry 3～8h, evenly spread the layer of aluminum alumina particle more then, described ceramic size is to be 2.6～3.0: 1 obtain even mixing of ratio by bauxite and Ludox in mass ratio; Four, being coated with of backing layer repeating step three of wax-pattern hung operation 5～7 times; Five, will be placed on through the wax-pattern that above-mentioned steps four obtains in 200～250 ℃ the drying oven and be incubated 1～1.5h, dewax, be incubated 1～2h after then temperature being increased to 900～1000 ℃, obtain the dot-matrix sandwich panel shell with the stove cooling again; Six, behind the aluminum alloy melting with stalk, dot-matrix sandwich panel shell and low differential pressure stove are fixed and are kept sealing, set the cast parameter of air injection machine then: rising hydraulic coupling is 10～15mbar/s, mold filling pressure is 15mbar/s, boost pressure is 20mbar/s, dwell pressure is 400mbar, dwell time is 120s, carry out rising liquid, fill type, pressurize gets dot-matrix sandwich panel, wherein, the temperature of aluminium alloy melt is at 740～750 ℃, the stalk temperature is at 750～760 ℃, and the dot-matrix sandwich panel shell carries out preheating at 250～260 ℃ of insulation 0.5～1h before fixing with low differential pressure stove.
2. the low-pressure casting method of a kind of dot-matrix sandwich panel according to claim 1, the model that it is characterized in that fusion sediment rapid forming equipment in the step 1 is FDM3000.
3. the low-pressure casting method of a kind of dot-matrix sandwich panel according to claim 1 and 2 is characterized in that the granularity of the titanium dioxide zircon sand that surface layer and proximal surface layer spread in the step 2 is 80～120 orders.
4. the low-pressure casting method of a kind of dot-matrix sandwich panel according to claim 3, the granularity that it is characterized in that the bauxite particle that backing layer spreads in the step 3 is 20～60 orders.
5. according to the low-pressure casting method of claim 1,2 or 4 described a kind of dot-matrix sandwich panels, it is characterized in that being coated with of backing layer repeating step three to wax-pattern hung operation 6 times in the step 4.
6. the low-pressure casting method of a kind of dot-matrix sandwich panel according to claim 5 is incubated 1.5h after it is characterized in that then temperature being increased to 950 ℃ in the step 5.
7. according to the low-pressure casting method of claim 1,2,4 or 6 described a kind of dot-matrix sandwich panels, it is characterized in that aluminium alloy is Al-7Si alloy, Al-12Si alloy or Al-5Cu alloy in the step 6.
8. the low-pressure casting method of a kind of dot-matrix sandwich panel according to claim 7, the temperature that it is characterized in that aluminium alloy melt in the step 6 is at 745 ℃, and the stalk temperature is at 755 ℃.
9. according to the low-pressure casting method of claim 1,2,4,6 or 8 described a kind of dot-matrix sandwich panels, it is characterized in that the dot-matrix sandwich panel shell carries out preheating at 252～258 ℃ of insulation 0.6～0.9h in the step 6 before fixing with low differential pressure stove.
10. the low-pressure casting method of a kind of dot-matrix sandwich panel according to claim 9 is characterized in that the dot-matrix sandwich panel shell carries out preheating at 255 ℃ of insulation 0.8h in the step 6 before fixing with low differential pressure stove.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102019346A (en) * | 2010-12-30 | 2011-04-20 | 沈阳黎明航空发动机(集团)有限责任公司 | Making method of rapid forming wax pattern of diffuser |
| CN104550729A (en) * | 2014-07-28 | 2015-04-29 | 霍山瑞精铸业有限公司 | Sand mold forming casting process |
| CN105033188A (en) * | 2015-05-22 | 2015-11-11 | 中国科学院固体物理研究所 | Aluminum-based dot matrix material based on 3D printing technology and preparation method thereof |
| CN105689643A (en) * | 2016-01-27 | 2016-06-22 | 北京科技大学 | Fast casting preparation method for steel-based abrasion-resistant and corrosion-resistant coating based on 3D printing |
| CN108326237A (en) * | 2017-11-28 | 2018-07-27 | 中国科学院金属研究所 | A kind of casting flaw control method of truss core structural member and application |
| CN112453325A (en) * | 2020-11-03 | 2021-03-09 | 哈尔滨工业大学 | Casting forming method of wing rudder with high-temperature alloy dot matrix sandwich structure |
| CN117840387A (en) * | 2024-03-08 | 2024-04-09 | 苏州美迈快速制造技术有限公司 | Precision casting die of skin lattice structure and production method |
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2009
- 2009-11-17 CN CN2009103098481A patent/CN101700568B/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102019346A (en) * | 2010-12-30 | 2011-04-20 | 沈阳黎明航空发动机(集团)有限责任公司 | Making method of rapid forming wax pattern of diffuser |
| CN102019346B (en) * | 2010-12-30 | 2012-11-07 | 沈阳黎明航空发动机(集团)有限责任公司 | Making method of rapid forming wax pattern of diffuser |
| CN104550729A (en) * | 2014-07-28 | 2015-04-29 | 霍山瑞精铸业有限公司 | Sand mold forming casting process |
| CN105033188A (en) * | 2015-05-22 | 2015-11-11 | 中国科学院固体物理研究所 | Aluminum-based dot matrix material based on 3D printing technology and preparation method thereof |
| CN105689643A (en) * | 2016-01-27 | 2016-06-22 | 北京科技大学 | Fast casting preparation method for steel-based abrasion-resistant and corrosion-resistant coating based on 3D printing |
| CN105689643B (en) * | 2016-01-27 | 2018-07-13 | 北京科技大学 | A kind of base steel abrasion-proof anti-corrosion coating quick cast preparation method based on 3D printing |
| CN108326237A (en) * | 2017-11-28 | 2018-07-27 | 中国科学院金属研究所 | A kind of casting flaw control method of truss core structural member and application |
| CN112453325A (en) * | 2020-11-03 | 2021-03-09 | 哈尔滨工业大学 | Casting forming method of wing rudder with high-temperature alloy dot matrix sandwich structure |
| CN117840387A (en) * | 2024-03-08 | 2024-04-09 | 苏州美迈快速制造技术有限公司 | Precision casting die of skin lattice structure and production method |
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