CN107626925A - A kind of laser gain material manufacture method of variable cross-section closed cell structure - Google Patents
A kind of laser gain material manufacture method of variable cross-section closed cell structure Download PDFInfo
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- CN107626925A CN107626925A CN201711060918.5A CN201711060918A CN107626925A CN 107626925 A CN107626925 A CN 107626925A CN 201711060918 A CN201711060918 A CN 201711060918A CN 107626925 A CN107626925 A CN 107626925A
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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 provides a kind of laser gain material manufacture method of variable cross-section closed cell structure, including step：First, three-dimensional part model is established, and hierarchy slicing discrete processes are carried out to three-dimensional part model with cutting software, according to every layer of slice information, planning obtains the scanning pattern of laser；2nd, substrate is fixed on the moulding cylinder of selective laser fusing former, metal dust is put into powder cylinder；3rd, forming cavity is cleaned using inert gas, layer of metal powder is laid on base material；The 4th, technological parameter is set, rotation sweep is carried out to the powder on base material according to current layer laser beam scan path；5th, formation cylinder declines the distance of a thickness, is repeated up to whole part completion of processing；6th, repeat step four, five, until whole part completion of processing；7th, prepare after terminating, cool down 30 minutes, remove unformed powder, then take out substrate, using wire cutting method, obtain variable cross-section closed cell structure part.
Description
Technical field
The invention belongs to metal-forming techniques field, specifically a kind of laser gain material manufacturer of variable cross-section closed cell structure
Method.
Background technology
The conventional method of domestic manufacture variable cross-section closed cell structure part is is welded at present after component parts processing, i.e.,：
Variable section structure and cover plate are final real then by cover plate and variable section structure welding using the processing of the traditional approach such as turning, milling
The manufacturing of existing variable cross-section closed cell structure part.But in this way there are shortcomings in manufacture：
（1）Variable cross-section closed cell structure is often processed under traditional processing mode for big cutting ratio, and local wall thickness is less than 0.1mm, pole
Inside parts stress concentration is easily caused, and thin-walled portion is easily deformed in machining process or local phenomena such as punching,
Seepage easily occurs during subsequently suppressing, causes part rejection；
（2）For cover plate with variable section structure to be welded to connect, welding heat affected zone inner tissue is thick, and welding stress is concentrated, often
Crack；
（3）The closed cell structure of conventional two-piece design, its overall sealing performance ensures mainly by special processes such as welding, causes zero
The global reliability of part is relatively low.
Causing classical production process for these reasons, not only production efficiency is low, and product qualification rate is low, causes zero
The part production cycle is grown, and manufacturing cost is high, seriously restricts the engineering application of such part.
The content of the invention
The present invention is for above shortcomings in the prior art, there is provided a kind of technique is simply controllable, properties of product are full
The laser gain material manufacture method of the variable cross-section closed cell structure of sufficient requirement.The present invention is achieved by the following technical solutions.
According to a kind of laser gain material manufacture method of variable cross-section closed cell structure provided by the invention, comprise the following steps：
Step 1：Three-dimensional part model is established according to formation of parts, and hierarchy slicing is carried out to three-dimensional part model with cutting software
Discrete processes, according to every layer of slice information, planning obtains the scanning pattern of laser；
Step 2：Substrate is fixed on the moulding cylinder of selective laser fusing former, metal dust is put into powder cylinder；
Step 3：Forming cavity is cleaned using inert gas, starts power spreading device, layer of metal powder is laid on base material；
Step 4：Start selective laser fusing former, technological parameter is set, and the laser beam that laser is sent is according to current layer
Laser beam scan path carries out rotation sweep to the powder on base material, processes current layer, and current layer outline is repeated
Scanning；
Step 5：Formation cylinder declines the distance of a thickness, and metal dust is delivered to power spreading device by dust feeder, meanwhile, powdering dress
Put the laying layer of metal powder on manufactured current layer；
Step 6：Repeat step 4 ~ 5, until whole part completion of processing；
Step 7：Open working chamber, remove powder, take out the part through step 6 completion of processing, using wire cutting method by part with
Substrate is separated, and part is made annealing treatment, and final variable cross-section closed cell structure is made.
Preferably, the granularity of the metal dust selected in step 2 is 20~50 μm.
Preferably, the material of the substrate selected in step 2 is identical with the material of selected metal dust.
Preferably, the metal dust is high temperature alloy, titanium alloy or stainless steel.
Preferably, the 3 d modeling software is Pro/E softwares, Magics softwares or 3-matic softwares, and cutting software is
Magics softwares.
Preferably, in step 3, oxygen content concentration in forming cavity is controlled to be not higher than 10ppm；The inert atmosphere is high-purity pressure
（≥99.999%）, throughput 5mL/min.
Preferably, the technological parameter described in step 4 is：300~500W of power output, 0.1~0.2mm of spot diameter, sweeps
Retouch 500~1000mm/min of speed, overlapping rate 10%~30%.
Compared with prior art, the present invention has following beneficial effect：
1st, the laser gain material manufacture method of a kind of variable cross-section closed cell structure of the invention, can solve in traditional processing mode such zero
Part part internal stress is concentrated, and thin-walled portion easily deforms or local phenomena such as punching.
2nd, Quick-forming is realized by using selective laser fusing former, type, core during without casting and follow-up
Welding, improves stock utilization, reduces process, shorten the part manufacturing cycle.
3rd, solving under conventionally manufactured mode that closed cell structure overall sealing performance is low, product qualification rate is low etc. seriously restricts such
The bottleneck problem of piecemeal engineeringization application.
4th, by using the metal dust of specific components content, with reference to fast shaping technology and prior heat treatment process, obtain
The part obtained has high intensity, high-ductility simultaneously, and comprehensive mechanical property reaches forging level.
Embodiment
With reference to specific embodiment, the present invention is described in detail.Following examples will be helpful to the technology of this area
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill to this area
For personnel, without departing from the inventive concept of the premise, some changes and improvements can also be made.These belong to the present invention
Protection domain.
According to a kind of laser gain material manufacture method of variable cross-section closed cell structure provided by the invention, comprise the following steps：
Step 1, three-dimensional part model is established according to formation of parts, and hierarchy slicing is carried out to three-dimensional part model with cutting software
Discrete processes, according to every layer of slice information, planning obtains the scanning pattern of laser；
Step 2, substrate is fixed on the moulding cylinder of selective laser fusing former, metal dust is put into powder cylinder；
Step 3, using inert gas forming cavity is cleaned, control oxygen content concentration in forming cavity to be not higher than 10ppm；Start
Power spreading device, layer of metal powder is laid on base material；
Step 4, start selective laser fusing former, technological parameter is set, and the laser beam that laser is sent is according to current layer
Laser beam scan path carries out rotation sweep to the powder on base material, processes current layer, and current layer outline is repeated
Scanning；
Step 5, formation cylinder decline the distance of a thickness, and metal dust is delivered to power spreading device by dust feeder, meanwhile, powdering dress
Put the laying layer of metal powder on manufactured current layer；
Step 6, repeat step 4 ~ 5, until whole part completion of processing；
Step 7, open working chamber, remove powder, take out the part through step 6 completion of processing, using wire cutting method by part with
Substrate is separated, and part is made annealing treatment, and final variable cross-section closed cell structure is made.
Preferably, the metal dust is high temperature alloy, titanium alloy or stainless steel.
Preferably, the 3 d modeling software is Pro/E softwares, Magics softwares or 3-matic softwares.
Preferably, the Slice Software is Magics softwares.
Preferably, the granularity of the metal dust selected in step 2 is 20~50 μm.
Preferably, the material of the substrate selected in step 2 is identical with the material of selected metal dust.
Preferably, inert atmosphere described in step 3 is high-purity pressure（≥99.999%）, throughput 5mL/min.
Preferably, the technological parameter described in step 4 is：300~500W of power output, 0.1~0.2mm of spot diameter, sweeps
Retouch 500~1000mm/min of speed, overlapping rate 10%~30%.
The specific embodiment of the present invention is described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make a variety of changes or change within the scope of the claims, this not shadow
Ring the substantive content of the present invention.
Claims (8)
1. a kind of laser gain material manufacture method of variable cross-section closed cell structure, it is characterised in that comprise the following steps：
Step 1, three-dimensional part model is established according to formation of parts, and hierarchy slicing is carried out to three-dimensional part model with cutting software
Discrete processes, according to every layer of slice information, planning obtains the scanning pattern of laser；
Step 2, substrate is fixed on the moulding cylinder of selective laser fusing former, metal dust is put into powder cylinder；
Step 3, using inert gas forming cavity is cleaned, start power spreading device, layer of metal powder is laid on base material；
Step 4, start selective laser fusing former, technological parameter is set, and the laser beam that laser is sent is according to current layer
Laser beam scan path carries out rotation sweep to the powder on base material, processes current layer, and current layer outline is repeated
Scanning.
Step 5, formation cylinder decline the distance of a thickness, and metal dust is delivered to power spreading device by dust feeder, meanwhile, powdering dress
Put the laying layer of metal powder on manufactured current layer；
Step 6, repeat step 4 ~ 5, until whole part completion of processing；
Step 7, open working chamber, remove powder, take out the part through step 6 completion of processing, using wire cutting method by part with
Substrate is separated, and part is made annealing treatment, and final variable cross-section closed cell structure is made.
2. the laser gain material manufacture method of a kind of variable cross-section closed cell structure according to claim 1, it is characterised in that described
In step 2, metal dust is high temperature alloy, titanium alloy or stainless steel.
3. the laser gain material manufacture method of a kind of variable cross-section closed cell structure according to claim 1, it is characterised in that described
In step 2, the granularity of selected metal dust is 20~50 μm.
4. the laser gain material manufacture method of a kind of variable cross-section closed cell structure according to claim 1, it is characterised in that described
In step 2, the material of the substrate of selection is identical with the material of selected metal dust.
5. the laser gain material manufacture method of a kind of variable cross-section closed cell structure according to claim 1, it is characterised in that described
In step 3, oxygen content concentration≤10ppm in forming cavity is controlled.
6. the laser gain material manufacture method of a kind of variable cross-section closed cell structure according to claim 1, it is characterised in that described
The software of three-dimensional modeling is Pro/E softwares, Magics softwares or 3-matic softwares, and cutting software is Magics softwares.
7. the laser gain material manufacture method of a kind of variable cross-section closed cell structure according to claim 1, it is characterised in that described
In step 3, inert atmosphere is high-purity pressure, purity >=99.999%, throughput 5mL/min.
8. the laser gain material manufacture method of a kind of variable cross-section closed cell structure according to claim 1, it is characterised in that described
In step 4, technological parameter is：300~500W of power output, 0.1~0.2mm of spot diameter, 500~1000mm/ of sweep speed
Min, overlapping rate 10%~30%.
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Cited By (7)
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| CN108526824A (en) * | 2018-04-18 | 2018-09-14 | 中国工程物理研究院机械制造工艺研究所 | A kind of micropore combined machining method |
| CN109036590A (en) * | 2018-08-02 | 2018-12-18 | 中国地质大学（武汉） | A kind of sandwich structure divertor module and its integrally formed manufacturing method |
| CN110329551A (en) * | 2019-07-18 | 2019-10-15 | 南京航空航天大学 | A kind of multifunctional bionic thermal protection structure and its manufacturing process |
| CN112077305A (en) * | 2020-07-28 | 2020-12-15 | 北京卫星制造厂有限公司 | Process method for laser additive manufacturing of high-strength aluminum alloy structure |
| CN112265271A (en) * | 2020-09-08 | 2021-01-26 | 同济大学 | 3D printing path generation method with modeling and slicing parallel |
| CN113500209A (en) * | 2021-07-15 | 2021-10-15 | 鑫精合激光科技发展（北京）有限公司 | Additive manufacturing forming method and system and terminal equipment |
| CN114378309A (en) * | 2021-12-29 | 2022-04-22 | 天翼物联科技有限公司 | Flexible manufacturing system and flexible manufacturing method for complex component |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108526824A (en) * | 2018-04-18 | 2018-09-14 | 中国工程物理研究院机械制造工艺研究所 | A kind of micropore combined machining method |
| CN109036590A (en) * | 2018-08-02 | 2018-12-18 | 中国地质大学（武汉） | A kind of sandwich structure divertor module and its integrally formed manufacturing method |
| CN110329551A (en) * | 2019-07-18 | 2019-10-15 | 南京航空航天大学 | A kind of multifunctional bionic thermal protection structure and its manufacturing process |
| CN112077305A (en) * | 2020-07-28 | 2020-12-15 | 北京卫星制造厂有限公司 | Process method for laser additive manufacturing of high-strength aluminum alloy structure |
| CN112265271A (en) * | 2020-09-08 | 2021-01-26 | 同济大学 | 3D printing path generation method with modeling and slicing parallel |
| CN112265271B (en) * | 2020-09-08 | 2021-10-08 | 同济大学 | 3D printing path generation method with modeling and slicing parallel |
| CN113500209A (en) * | 2021-07-15 | 2021-10-15 | 鑫精合激光科技发展（北京）有限公司 | Additive manufacturing forming method and system and terminal equipment |
| CN114378309A (en) * | 2021-12-29 | 2022-04-22 | 天翼物联科技有限公司 | Flexible manufacturing system and flexible manufacturing method for complex component |
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