CN210789230U - Four-laser four-vibrating-mirror selective laser melting forming device - Google Patents
Four-laser four-vibrating-mirror selective laser melting forming device Download PDFInfo
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- CN210789230U CN210789230U CN201921646604.8U CN201921646604U CN210789230U CN 210789230 U CN210789230 U CN 210789230U CN 201921646604 U CN201921646604 U CN 201921646604U CN 210789230 U CN210789230 U CN 210789230U
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Abstract
The utility model discloses a four-laser four-vibrating mirror laser selective melting forming device, which comprises a four-laser four-vibrating mirror system, a gas circulation purification system and a bidirectional powder feeding system; the four-laser four-galvanometer system comprises four paths of laser galvanometer light paths, each path of laser galvanometer light path comprises a laser, a beam expander, a variable beam expanding collimating lens unit and a scanning galvanometer which are sequentially connected, and four paths of laser beams are all irradiated onto a powder bed of a part to be processed; the gas circulation purification system comprises an air inlet and an air outlet, wherein the air inlet is a hidden curved surface filled with a plurality of holes, and the air outlet is funnel-shaped. The utility model discloses utilize implicit expression curved surface porous structure to optimize the wind gap, the inside circulating gas of homogenization cavity greatly improves laser election district melting shaping efficiency, reduces the internal stress, improves shaping product quality.
Description
Technical Field
The utility model relates to a vibration material disk technical field, concretely relates to four laser four galvanometer laser selective melting forming device.
Background
The laser selective melting forming technology is one of additive manufacturing technologies, selective melting processing is carried out by laser through powder laying layer by layer, a complex space part structure can be formed, the precision of the formed part is higher than that of other additive manufacturing technologies, and the laser selective melting forming technology is one of the processing technologies with the most industrialized application prospect in the metal additive manufacturing technology. However, the existing selective laser melting and forming equipment has the common problems that the processing efficiency is low, and the fastest forming efficiency of the general selective single-laser-galvanometer selective laser melting and forming equipment is 20cm3And h, greatly limiting the industrial application and popularization of the equipment.
SUMMERY OF THE UTILITY MODEL
In order to overcome the lower problem of laser election district melting forming efficiency among the prior art, the utility model provides a four laser four galvanometer laser election district melting forming device.
The utility model adopts the following technical scheme:
a four-laser four-vibrating mirror laser selective melting forming device comprises a sealed forming cavity and an industrial personal computer, wherein a processing forming platform is arranged in the sealed forming cavity, the processing forming platform is provided with a part to be processed, and the four-laser four-vibrating mirror laser selective melting forming device further comprises a four-laser four-vibrating mirror system, a gas circulation purification system and a two-way powder feeding system;
the four-laser four-galvanometer system comprises four paths of laser galvanometer light paths, each path of laser galvanometer light path comprises a laser, a beam expander, a variable beam expanding collimating lens unit and a scanning galvanometer which are sequentially connected, and four paths of laser beams are all irradiated onto a powder bed of a part to be processed;
the gas circulation purification system comprises an air inlet and an air outlet, wherein the air inlet is a hidden curved surface filled with a plurality of holes, and the air outlet is funnel-shaped.
The four scanning galvanometers of the utility model are arranged in parallel by 2 multiplied by 2.
The implicit curved surface is a Gyroid implicit curved surface.
The bidirectional powder feeding system is of an upper powder feeding structure.
The opening of the hidden curved surface is 3mm-10 mm.
A method for a four-laser four-galvanometer laser selective melting forming device comprises the following steps:
turning on a power supply, uniformly spreading the metal powder by the bidirectional powder feeding system, and scraping redundant powder into a powder recovery tank;
the industrial personal computer sends a signal to four laser galvanometer light paths, so that a laser beam is shot onto a powder bed of a part to be processed, and processing is carried out according to four region division;
when four beams of laser are focused and printed on a powder bed of a part to be processed, generated splash particles and black smoke are extracted from an air pump, and argon is conveyed to an air outlet through an air inlet to realize the purification of a gas environment;
the utility model carries out the lap joint scanning of the allowance of 0.1-0.5mm at the junction of the areas.
The utility model has the advantages that:
(1) because the forming speed is high, impurities such as splash, black smoke and the like generated by the forming speed are increased by times, and a common circulating purification system cannot meet the requirement of the forming quality;
(2) the utility model adopts four lasers and four vibrating mirrors to process four parts of the same part, which is more than four times of the forming and processing efficiency of a single laser and a single vibrating mirror;
(3) the utility model discloses choose 2X 2 array form for use, every galvanometer all has the dynamic focus function, controls laser beam's facula size, can realize that the facula is by the change of 30 microns to 100 microns, can realize carrying out the quick laser beam machining shaping of big facula in the position of shaping area broad.
Drawings
FIG. 1 is a schematic diagram of the apparatus of the present invention;
fig. 2 is a schematic view of the forming platform of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following examples and drawings, but the present invention is not limited thereto.
Examples
As shown in fig. 1-2, a four-laser four-galvanometer laser selective melting and forming device comprises a sealed forming cavity and an industrial personal computer, wherein a processing and forming platform is arranged in the sealed forming cavity, a part 25 to be processed is arranged on the processing and forming platform, the cavity is a processing cavity of equipment, and a gas circulation purification system, a two-way powder feeding system and a powder recovery system are further arranged in the cavity.
The processing and forming platform is 250mm multiplied by 300mm, and the up-and-down movement of the forming cylinder is controlled by a precise motor, so that the layer-by-layer processing of the sample is realized.
The four-laser four-galvanometer system comprises four paths of laser galvanometer light paths, each path of laser galvanometer light path comprises a laser, a beam expander, a variable beam expanding collimating lens unit and a scanning galvanometer which are sequentially connected, and four paths of laser beams are all irradiated onto a powder bed of a part to be processed; the four scanning galvanometers are positioned right above a processing forming surface and arranged in a 2 x 2 array form, each galvanometer has a dynamic focusing function, the size of a light spot is controlled by a control system of dynamic focusing, the light spot can be changed from 30 micrometers to 100 micrometers, the scanning path dynamic focusing planning is utilized, the large light spot rapid laser processing forming can be realized at the position with a wider forming area, and the small light spot can be precisely processed and formed in fine structures such as porous structures, thin rods, small holes and the like.
By adopting the array form, the maximum area division processing can be carried out on the part to be processed.
The four lasers pass through light paths such as a beam expander and dynamic focusing, light sources are excited to a galvanometer system by the lasers, four galvanometer groups deflect through a galvanometer control system, the deflection path planning can be four parts of the same part, namely, a large-size part is divided into four areas on the same plane through path planning, and the four laser four galvanometers work simultaneously to realize the simultaneous processing of the four areas of the same part.
The four-laser four-vibration mirror forming efficiency can reach more than four times of the single-laser single-vibration mirror forming efficiency, namely 80cm3More than h. Because the forming speed is high, the generated impurities such as splash, black smoke and the like are increased by times, and the common circulating purification system cannot meet the requirement of the forming quality. In order to solve the problems, an air inlet and an air outlet of a circulating purification system are optimally designed, so that the performance difference of different parts of the same component caused by the non-uniform air output and air speed is avoided.
The gas circulation purification system comprises an air inlet and an air outlet which are arranged on the side face of a sealed chamber, the air inlet is a hidden curved surface filled with a plurality of holes, the hidden curved surface is a Gyroid hidden curved surface, the structure is generated by parameterization through Matlab, the size of an opening of the hidden curved surface is adjusted through adjusting equation parameters, and the size of a unit body can be changed from 3mm to 10 mm.
The air outlet is funnel-shaped.
The gas circulation purification system generally uses argon, the argon is pumped out from a gas pump, flows and is homogenized after flowing of the air outlet through a Gyroid type implicit curved surface porous air inlet, the air outlet flows through a printing sample in the forming process, substances such as splashing, black smoke and the like generated by large-size metal parts during simultaneous machining of four-laser four-vibrating mirrors are conveyed to the other end of the forming cylinder, namely the position of an air outlet, and tiny particles generated in the printing process are conveyed to a filter screen through a circulation pipeline, so that the gas environment of a sealed chamber can be purified.
The bidirectional powder feeding system comprises a powder feeding funnel, a powder paving device and a powder paving guide rail. Whether metal powder leaks down through sending powder funnel to control powder, detect the position of shop's powder module through displacement sensor, when shop's powder module moves to sending powder funnel below, send the powder funnel to open, the powder ration leaks down, then shop's powder module moves to the shaping platform position, leaks the limit and paves the quick even shop that realizes the powder and put down.
The utility model discloses a working process does:
the power supply of the industrial personal computer 1 is turned on, the power supply of the display controller 2 is turned on, the power supply of the laser 3, the power supply of the laser 4, the power supply of the laser 5 and the power supply of the laser 6 are turned on. The power supply of the scanning galvanometer 15, the power supply of the scanning galvanometer 16, the power supply of the scanning galvanometer 17 and the power supply of the scanning galvanometer 18 are turned on.
Send powder funnel switch to open, carry the powder to spread on powder device 27, spread powder device 27 and begin work, spread powder functioning speed through its control software control, slide along guide rail 26 and guide rail 29, spread powder device 27 and include powder silo, software scraper, leak whitewashed mouth and leak whitewashed switch, when spreading powder device through processing base plate platform 19, leak whitewashed switch and open, leak whitewashed volume and software scraper cooperation through control, realize metal powder's even shop powder.
The powder spreading device 27 runs to the position above the powder recovery groove 21 at the left end of the forming cavity through a guide rail, and scrapes the redundant powder spread and the powder with splashed and polluted surfaces into the powder recovery groove 21.
The industrial personal computer sends a signal to the laser 3, a laser beam emitted by the laser passes through the beam expander 7, enters the variable beam expanding collimating lens unit 11, enters the scanning galvanometer 15 with a dynamic focusing function through the variable beam expanding collimating lens unit, and the scanning galvanometer 15 performs dynamic focusing and path scanning on the laser beam, so that the laser beam 22 is irradiated on a powder bed of the part 15 being processed.
The industrial personal computer sends a signal to the laser 4, a laser beam emitted by the laser 4 enters the variable beam expanding collimating lens unit 12 through the beam expander 8, enters the scanning galvanometer 17 with a dynamic focusing function through the variable beam expanding collimating lens unit, and the scanning galvanometer 17 performs dynamic focusing and path scanning on the laser beam so that the laser beam 20 is irradiated onto a powder bed of the part 15 being processed.
The industrial personal computer sends a signal to the laser 5, a laser beam emitted by the laser 5 enters the variable beam expanding collimating lens unit 13 through the beam expander 9, enters the scanning galvanometer 16 with a dynamic focusing function through the variable beam expanding collimating lens unit, and the scanning galvanometer 16 performs dynamic focusing and path scanning on the laser beam, so that the laser beam 24 is irradiated on a powder bed of the part 15 being processed.
The industrial personal computer sends a signal to the laser 6, a laser beam emitted by the laser passes through the beam expander 10, enters the variable beam expanding and collimating lens unit 14, enters the scanning galvanometer 18 with a dynamic focusing function through the variable beam expanding and collimating lens unit, and the scanning galvanometer 18 performs dynamic focusing and path scanning on the laser beam, so that the laser beam 28 is irradiated on a powder bed of the part 15 being processed.
The laser beam 22, the laser beam 20, the laser beam 24 and the laser beam 28 are printed in areas, the area division is determined by path planning of control software, and lap scanning with a margin of 0.1-0.5mm is performed at the area boundary.
When four laser beams are focused and printed on a powder bed of a part 15 to be processed, splash particles, metal compound black smoke and argon gas generated by interaction of the laser and metal material powder are pumped out from an air pump, pass through a Gyroid type implicit curved surface porous air inlet 30, flow of the air is homogenized, and then pass through a printing sample in the forming process, substances such as splash, black smoke and the like generated when a large-size metal part is simultaneously processed by a four-laser four-vibrating mirror are conveyed to the other end of a forming cylinder, namely the air outlet position, and tiny particles generated in the printing process are quickly and uniformly conveyed into a filter screen through a circulating pipeline, so that the gas environment of a sealed chamber can be purified. Wherein, the air outlet 23 is funnel-shaped.
After the four laser beams finish the processing breadth of the Nth layer, the powder spreading device 27 stopped at the left end of the forming chamber scrapes back towards the direction of the powder feeding groove at the right end, simultaneously leaks powder and spreads powder, and powder with a preset layer thickness is spread on the plane of the Nth layer. And when the powder spreading device stays at the powder leaking groove again, the four-laser four-vibrating mirror starts to work again to process the (N + 1) th layer of processing breadth.
And circulating the steps until the workpiece is subjected to selective laser melting molding.
The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited by the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.
Claims (5)
1. A four-laser four-vibrating mirror laser selective melting forming device comprises a sealed forming cavity and an industrial personal computer, wherein a processing forming platform is arranged in the sealed forming cavity, and the processing forming platform is provided with a part to be processed;
the four-laser four-galvanometer system comprises four paths of laser galvanometer light paths, each path of laser galvanometer light path comprises a laser, a beam expander, a variable beam expanding collimating lens unit and a scanning galvanometer which are sequentially connected, and four paths of laser beams are all irradiated onto a powder bed of a part to be processed;
the gas circulation purification system comprises an air inlet and an air outlet, wherein the air inlet is a hidden curved surface filled with a plurality of holes, and the air outlet is funnel-shaped.
2. The selective laser melting and forming device with four laser four vibrating mirrors according to claim 1, wherein the four scanning vibrating mirrors are arranged in parallel by 2 x 2.
3. The four-laser four-vibrating-mirror selective laser melting forming device as claimed in claim 1, wherein the implicit curved surface is a Gyroid implicit curved surface.
4. The four-laser four-vibrating-mirror selective laser melting and forming device as claimed in claim 1, wherein the bidirectional powder feeding system is an upper powder feeding structure.
5. The four-laser four-vibrating-mirror selective laser melting and forming device according to claim 1, wherein the opening of the hidden curved surface is 3mm-10 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921646604.8U CN210789230U (en) | 2019-09-29 | 2019-09-29 | Four-laser four-vibrating-mirror selective laser melting forming device |
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| CN201921646604.8U CN210789230U (en) | 2019-09-29 | 2019-09-29 | Four-laser four-vibrating-mirror selective laser melting forming device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110523989A (en) * | 2019-09-29 | 2019-12-03 | 华南理工大学 | One kind four laser, four galvanometer selective laser melting forming device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110523989A (en) * | 2019-09-29 | 2019-12-03 | 华南理工大学 | One kind four laser, four galvanometer selective laser melting forming device and method |
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