CN105127426A - Three-dimensional structure combined sintering processing method - Google Patents
Three-dimensional structure combined sintering processing method Download PDFInfo
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- CN105127426A CN105127426A CN201510634965.0A CN201510634965A CN105127426A CN 105127426 A CN105127426 A CN 105127426A CN 201510634965 A CN201510634965 A CN 201510634965A CN 105127426 A CN105127426 A CN 105127426A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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Abstract
The invention relates to a three-dimensional structure combined sintering processing method. The three-dimensional structure combined sintering processing method comprises the following steps: firstly, designing a stereotyped structure and a powder material structure according to structure of a structural component, wherein the powder material structure is contained in a cavity formed by the stereotyped structure; secondly, spreading powder and sintering layer by layer by adopting a selective laser sintering technology for completing preparation of the stereotyped structure and moulding of the powder material structure, wherein the preparation of the stereotyped structure is realized by virtue of the selective laser sintering technology; and thirdly, further sintering the stereotyped structure with the powder material structure for realizing integral curing of the powder material structure. The three-dimensional structure combined sintering processing method provided by the invention is applicable to processing of three-dimensional structures with various complex models, and compared with the traditional laser sintering technology, the three-dimensional structure combined sintering processing method has the advantages that processing volume of a workpiece is obviously reduced and working efficiency is obviously improved.
Description
Technical field
The present invention relates to a kind of three-dimensional structure processing method, particularly relate to the combinational processing method of a kind of selective laser sintering and other sintering methods.
Background technology
Selective laser sintering (SLS) is the one of rapid prototype manufacturing, laser instrument is adopted to make the energy, its course of work is: the 3D solid cad model setting up part first in a computer, slicing treatment is carried out by delamination software, obtain the information of each processing aspect, and be converted into the signal of telecommunication to control laser scanning system.The rapidoprint powder that uniform spreading last layer is very thin on the table, laser beam sinters selectively according to part layering profile under the control of the computer, be bonded together in cooling procedure subsequently by the rapidoprint powder smelting of laser beam irradiation, just complete the processing of an aspect; Successively spread powder, successively scan sintering, until complete the processing of last one deck, produce three-dimensional entity model.Remove unnecessary rapidoprint powder after whole sintering is complete, then carry out polishing, the subsequent treatment such as oven dry just obtains parts.This technology have rapidoprint range of choice extensively, excess stock is easy to the advantages such as cleaning, applied range, is applicable to the manufacture of prototype and function part.
As everyone knows, along with the increase of structural member size, structural member volume will increase with more significant multiple (cube of size ratio).At present, during the large part adopting Selective Laser Sintering processing dimension larger, during the metalwork that especially processing dimension is large, comparatively large owing to totally sintering volume, there will be long processing time, the problems such as processing cost is high.
Summary of the invention
The present invention is in order to solve in selective laser sintering technique, along with the increase of workpiece size, workpiece volume enlarges markedly, and then causes and just increase process time, the problem that processing cost improves, and propose a kind of three-dimensional structure combined sintering processing method of improvement.
Three-dimensional structure combined sintering processing method of the present invention comprises following steps:
Step one, according to structural member structural design stereotyped structure and dusty material structure, described dusty material structure be included in described stereotyped structure formed cavity in.
Step 2, use Selective Laser Sintering, successively spread powder, successively sinter, complete the preparation of described stereotyped structure and the shaping of described dusty material structure, the preparation of described stereotyped structure is realized by Selective Laser Sintering.
Step 3, described stereotyped structure to be sintered further together with described dusty material structure, realize the integrally curing of described dusty material structure.
Further, in described step one, described stereotyped structure and described dusty material structure are by CAD software design tool complete design.
Further, in described step 2, the shaping of described dusty material structure be by described paving powder operation and complete described stereotyped structure preparation after self-assembling formation.
In described step 3, the method for described further sintering is including but not limited to sintering processings such as high temperature furnace sintering, discharge plasma sinterings.
Further, in described step 2, for the material of described paving powder including but not limited to the metal alloy powders such as titanium alloy powder, iron-based powder.
Three-dimensional structure processing method provided by the invention have employed layering form processing, can process the workpiece of various complex model in theory.Component shaping method adopts laser sintering process, and machining accuracy is higher, and crudy is better.Compared with existing laser sintering process, laser sintered machining area is confined to stereotyped structure, but not whole workpiece, significantly reduce processing capacity.To process the square that the length of side is 100mm, traditional laser sintered processing capacity is 1000000 cubic millimeters, adopt processing technology of the present invention, setting stereotyped structure thickness is 1.5mm, can show that laser sintered processing capacity of the present invention is about 100*100*1.5*6=90000 cubic millimeter, both processing capacities differ 11.1 times.Can find out, compared with traditional laser sintering technology, the present invention has a clear superiority in reduction work pieces process amount, raising working (machining) efficiency.
Accompanying drawing explanation
Fig. 1 is processing process figure of the present invention.
Fig. 2 is the contour structures schematic diagram of the workpiece in the embodiment of the present invention 1.
Fig. 3 is the machining sketch chart adopting selective laser sintering in the embodiment of the present invention 1.
Fig. 4 adopts the tomograph at a certain time point workpiece in selective laser sintering process in the embodiment of the present invention 1.
Fig. 5 is the contour structures schematic diagram of the workpiece in the embodiment of the present invention 2.
Fig. 6 is the machining sketch chart adopting selective laser sintering in the embodiment of the present invention 2.
Fig. 7 adopts the tomograph at a certain time point workpiece in selective laser sintering process in the embodiment of the present invention 2.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the invention is described further.
Embodiment 1:
According to reference Fig. 2, in this example, workpiece shape is a cuboid, and its key dimension is as follows: long 25mm, wide 25mm, high 50mm.
First, set up the 3D solid cad model of workpiece in a computer, setting stereotyped structure and dusty material structure, wherein the thickness of stereotyped structure is set as 0.2mm, namely stereotyped structure is the housing that a 0.2mm is thick, its outer surface is consistent with the outer surface of workpiece, and dusty material structure is for removing the part (stereotyped structure is shown in Fig. 3 (d) shown in label 1, and dusty material structure is shown in that in Fig. 3 (d), label 2 is shown) of stereotyped structure in workpiece.Carry out slicing treatment by delamination software, obtain the information of each processing aspect, and be converted to signal of telecommunication control laser sintering system.
Then, the titanium alloy powder that uniform spreading one deck 0.2mm is thick on the table, uses selective laser sintering to be processed to form the stereotyped structure of this layer, completes the processing of an aspect.
Again, successively spread titanium alloy powder, successively scan sintering (every layer thickness 0.2mm), until complete the processing of last one deck, obtain selective laser sintering semi-finished product.Fig. 3 is process schematic diagram, and Fig. 4 is the workpiece schematic three dimensional views that in process, a certain time point is formed, and can see and define stereotyped structure and dusty material structure composition after selective laser sintering completes.
Finally, the stereotyped structure of laser sintered rear formation and the dusty material structure that comprises thereof are sintered further, obtains workpiece finished product.
Embodiment 2:
According to reference Fig. 5, in this example, workpiece shape is " returning " shape extrusion, and its key dimension is as follows: high 1000mm, the outer square length of side 700mm of " returning " shape, interior square length of side 300mm.
First, set up the 3D solid cad model of workpiece in a computer, setting stereotyped structure and dusty material structure, wherein the thickness of stereotyped structure is set as 50mm, namely stereotyped structure is the housing that a 50mm is thick, its outer surface is consistent with the outer surface of workpiece, and dusty material structure is for removing the part (stereotyped structure is shown in Fig. 6 (d) shown in label 1, and dusty material structure is shown in that in Fig. 6 (d), label 2 is shown) of stereotyped structure in workpiece.Carry out slicing treatment by delamination software, obtain the information of each processing aspect, and be converted to signal of telecommunication control laser sintering system.
Then, the ferroalloy powder that uniform spreading one deck 10mm is thick on the table, uses selective laser sintering to be processed to form the stereotyped structure of this layer, completes the processing of an aspect.
Again, successively spread titanium alloy powder, successively scan sintering (every layer thickness 10mm), until complete the processing of last one deck, obtain selective laser sintering semi-finished product.Fig. 6 is process schematic diagram, and Fig. 7 is the workpiece schematic three dimensional views that in process, a certain time point is formed, and can see that selective laser sintering semi-finished product are made up of stereotyped structure and dusty material structure.
Finally, the stereotyped structure of laser sintered rear formation and the dusty material structure that comprises thereof are sintered further, obtains workpiece finished product.
More than show and describe general principle of the present invention and principal character.The technical staff of the industry should understand the present invention not by the restriction of above-mentioned using method; what describe in above-mentioned using method and description just says principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall into application claims protection domain in the claimed scope of the invention and defined by appending claims and equivalent thereof.
Claims (5)
1. a three-dimensional structure combined sintering processing method, it is characterized in that: described processing method comprises following steps: step one, according to structural member structural design stereotyped structure and dusty material structure, described dusty material structure is included in the cavity that described stereotyped structure formed; Step 2, use Selective Laser Sintering, successively spread powder, successively sinter, complete the preparation of described stereotyped structure and the shaping of described dusty material structure, the preparation of described stereotyped structure is realized by Selective Laser Sintering; Step 3, described stereotyped structure to be sintered further together with described dusty material structure, realize the integrally curing of described dusty material structure.
2. three-dimensional structure combined sintering processing method according to claim 1, is characterized in that: in described step one, and described stereotyped structure and described dusty material structure are by CAD software design tool complete design.
3. three-dimensional structure combined sintering processing method according to claim 1, is characterized in that: in described step 2, the shaping of described dusty material structure be by described paving powder operation and complete described stereotyped structure preparation after self-assembling formation.
4. three-dimensional structure combined sintering processing method according to claim 1, is characterized in that: in described step 3 kind, the method for described further sintering comprises the sintering processings such as high temperature furnace sintering, discharge plasma sintering.
5. three-dimensional structure combined sintering processing method according to claim 1, is characterized in that: described dusty material is the metal alloy powders such as titanium alloy powder, iron-based powder.
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Cited By (6)
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|---|---|---|---|---|
| CN106003363A (en) * | 2016-05-20 | 2016-10-12 | 西安工业大学 | 3D printing method for biological ceramic green body |
| CN106449423A (en) * | 2016-09-18 | 2017-02-22 | 南京航空航天大学 | Method for preparing structural part with conductive channel based on selective laser sintering technology |
| CN106623924A (en) * | 2016-12-07 | 2017-05-10 | 中北大学 | Method for forming functionally graded material on basis of selection laser melted powder metallurgy |
| EP3299098A1 (en) * | 2016-09-21 | 2018-03-28 | BAE Systems PLC | Improved additive layer manufacturing |
| WO2018055345A1 (en) * | 2016-09-21 | 2018-03-29 | Bae Systems Plc | Improved additive layer manufacturing |
| CN111036917A (en) * | 2019-10-30 | 2020-04-21 | 临沂迈得新材料有限公司 | Post-processing method for 3D printing of cobalt-chromium alloy |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106003363A (en) * | 2016-05-20 | 2016-10-12 | 西安工业大学 | 3D printing method for biological ceramic green body |
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| CN106449423A (en) * | 2016-09-18 | 2017-02-22 | 南京航空航天大学 | Method for preparing structural part with conductive channel based on selective laser sintering technology |
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| EP3299098A1 (en) * | 2016-09-21 | 2018-03-28 | BAE Systems PLC | Improved additive layer manufacturing |
| WO2018055345A1 (en) * | 2016-09-21 | 2018-03-29 | Bae Systems Plc | Improved additive layer manufacturing |
| CN106623924A (en) * | 2016-12-07 | 2017-05-10 | 中北大学 | Method for forming functionally graded material on basis of selection laser melted powder metallurgy |
| CN111036917A (en) * | 2019-10-30 | 2020-04-21 | 临沂迈得新材料有限公司 | Post-processing method for 3D printing of cobalt-chromium alloy |
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